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Morphological features of allogenic nerve segment in rats after subcutaneous embedment 认领 引用
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作者 Mingtang Gao Dianming Jiang 《Neural Regeneration Research》 CAS 2006年第1期50-52,共3页
BACKGROUND ： Some studies demonstrate that allogenic peripheral nerve segment embedded subcutaneously significantly reduce the infiltration of lymphocyte and decrease immunological reaction.OBJECTIVE ： To observe th... BACKGROUND ： Some studies demonstrate that allogenic peripheral nerve segment embedded subcutaneously significantly reduce the infiltration of lymphocyte and decrease immunological reaction.OBJECTIVE ： To observe the gross shape, optical and electron microscope results of allogenic nerve segment in rats 2 weeks after subcutaneous embedment, and compare with subcutaneous emdedment of autologous nerve segment. DESIGN ： A randomized and controlled experiment.SETTING ： Department of Orthopaedics of Fifth People＇s Hospital of Zhengzhou; Department of Orthopaedics,First Hospital Affiliated to Chongqing Medical University.MATERIALS ： Totally 30 adult healthy Wistar male rats, with body mass of （200±20） g, were enrolled. Ten rats were chosen as the donors of allogenic nerve transplantation. The other 20 rats were randomly divided into 2 groups： allogenic nerve embedment group and autologous nerve embedment group, with 10 rats in each one. JEM-1220 transmission electron microscope （Japan） and Olympus BX50 optical microscope （Japan） were used. METHODS ： This experiment was carried out at the laboratory of Orthopaedic Department, Chongqing Medical University from October 2000 to April 2002. ① Sciatic nerve of donor rats for allogenic nerve transplantation was cut off at 5 mm distant from pelvic strait.15 mm sciatic nerve segment was chosen from lateral part as graft, allogenic nerve embedment group： 15 mm sciatic nerve form the donor rats was embedded in the posterior part of right legs. Autologous nerve embedment group： 15 mm sciatic nerve segment of autologous left side was embedded in the posterior side of right legs. ② Nerve segment embedded subcutaneously was taken out at postoperative 2 weeks and performed gross observation; then 5 samples chosen randomly respectively from 2 groups and given haematoxylin-eosin staining and observation under optical microscope （×400）;The other 5 samples were made into ultrathin sections （0.5μm）and observed under transmission electron microscope（×17 000）. MAIN OUTCOME MEASURES ： Gross shape, optical and electron microscope results of nerve segments of rats between two groups at 2 weeks after subcutaneous embedment. RESULTS ： ① Results of gross observation： Appearance of nerve segment was similar between 2 groups. ② Results of optical observation： medullary sheath denaturation, axonotmesis, vascular engorgement, desmoplasia of adventitia and infiltration of inflammatory cells were all found in both 2 groups. Inflammatory reaction was a little more severe in the allogenic nerve embedment group than in the autologous nerve embedment groups.③Results of electron microscope ： Similar cataplasia and denaturation of medullary sheath and cataplasia of Schwann cell were all found in the 2 groups. CONCLUSION： Some inflammatory reaction occurs after allogenic nerve embedment, but the activity of Schwann cell is similar to that of peripheral nerve after autologous nerve embedment. 展开更多
关键词 Morphological features of allogenic nerve segment in rats after subcutaneous embedment
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Effect of Exposing Low-Frequency Electric Fields on the Proliferative Capacity and Morphological Features of Olfactory Ensheathing Cells in vitro 认领 引用
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作者 WANG Meng-hang LI Ping FAN Yu-bo 《Chinese Journal of Biomedical Engineering(English Edition)》 CAS 2014年第1期7-11,共5页
Olfactory ensheathing cells(OECs) transplanted into the damaged spinal cord may be considered as a valuable remedy explorations for spinal cord repair. The proliferation of transplanted olfactory ensheathing cells dep... Olfactory ensheathing cells(OECs) transplanted into the damaged spinal cord may be considered as a valuable remedy explorations for spinal cord repair. The proliferation of transplanted olfactory ensheathing cells depends on various environmental factors and effective cues, which may include electrical fields(EFs). In this study, we investigated the proliferative capacity, morphologic alterations of olfactory ensheathing cells derived from neonate rat that occurd when exposed to two EFs of 20 Hz, 50 mV and20 Hz, 100 mV for 6 h. For both EF treatments, the MTT results revealed that the cellular proliferation of exposed group during the last 6 h of the experiment was statistically higher than that of control group. Then, we investigated morphological structure changes in the cells stained by Coomassie brilliant blue. Compared with control group, most of cells were present at intensively proliferating appearance including the microfilaments were long and thick and the accumulated appearance of cells. It is conceivable that electrical fields as a new approach may promote the growth and proliferation of OECs and may be engineered to control the survival of transplanted OECs in injured spinal cord.Although our results have been suggesting that EFs may be non-chemical strategies for cell proliferation, the fundamental mechanisms remain to be elucidated. 展开更多
关键词 olfactory ensheating cells （OECs） electrical fields （EFs） proliferation,morphological features
THE MORPHOLOGICAL FEATURES AND ENVIRONMENTAL CONDITIONS OF ROCK GLACIERS IN TIANSHAN MOUNTAINS 认领 引用
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作者 Liu Gengnian Cui ZhijiuXiong Heigang 《Journal of Geographical Sciences》 1995年第1期41-51,共11页
-Rock glaciers are developed at permafrost areas of periglacial environment in Tianshan Mountains [7,17]. Based on field surveying andair-photo interprestation, the paper discusses the shape, characteristics of supply... -Rock glaciers are developed at permafrost areas of periglacial environment in Tianshan Mountains [7,17]. Based on field surveying andair-photo interprestation, the paper discusses the shape, characteristics of supply area, formation conditions and environmental differentiations of rockglaciers at head area of Urmqi River (43°05'-43°08' N, 86°48’-86°53E) inKalawuchen Range and the head areas of Toudao River and Danangou River (43°30’-43°50’N, 85°00-85°30’E) in Yilanhabierga Rangu at ShawanCounty. Formation conditions and morphological characteristics of rockglaciers are studies in terms of topographic conditions, climate, compositionand age. 展开更多
关键词 rock glaciers permafrost areas morphological features,Tianshan Mountains
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A Global Training Model for Beat Classification Using Basic Electrocardiogram Morphological Features 认领 引用
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作者 Shubha Sumesh John Yearwood +1 位作者 Shamsul Huda Shafiq Ahmad 《Computers, Materials & Continua》 SCIE EI 2022年第3期4503-4521,共19页
Clinical Study and automatic diagnosis of electrocardiogram(ECG)data always remain a challenge in diagnosing cardiovascular activities.The analysis of ECG data relies on various factors like morphological features,cla... Clinical Study and automatic diagnosis of electrocardiogram(ECG)data always remain a challenge in diagnosing cardiovascular activities.The analysis of ECG data relies on various factors like morphological features,classification techniques,methods or models used to diagnose and its performance improvement.Another crucial factor in themethodology is howto train the model for each patient.Existing approaches use standard training model which faces challenges when training data has variation due to individual patient characteristics resulting in a lower detection accuracy.This paper proposes an adaptive approach to identify performance improvement in building a training model that analyze global trainingmethodology against an individual training methodology and identifying a gap between them.We provide our investigation and comparative study on these methods and model with standard classification techniques with basic morphological features and Heart RateVariability(HRV)thatmay aid real time application.This approach helps in analyzing and evaluating the performance of different techniques and can suggests adoption of a best model identification with efficient technique and efficient attribute set for real-time systems. 展开更多
关键词 ECG morphological feature HRV global adaptive training multilayer perceptron(MLP) support vector machine(SVM) random forest(RF)
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Segmentation and measurement scheme for fish morphological features based on Mask R-CNN 认领 引用 被引量：14
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作者 Chuang Yu Xiang Fan +4 位作者 Zhuhua Hu Xin Xia Yaochi Zhao Ruoqing Li Yong Bai 《Information Processing in Agriculture》 EI 2020年第4期523-534,共12页
The morphological features of fish,such as the body length,the body width,the caudal peduncle length,the caudal peduncle width,the pupil diameter,and the eye diameter are very important indicators in smart mariculture... The morphological features of fish,such as the body length,the body width,the caudal peduncle length,the caudal peduncle width,the pupil diameter,and the eye diameter are very important indicators in smart mariculture.Therefore,the accurate measurement of the morphological features is of great significance.However,the existing measurement methods mainly rely on manual measurement,which is operationally complex,low efficiency,and high subjectivity.To address these issues,this paper proposes a scheme for segmenting fish image and measuring fish morphological features indicators based on Mask R-CNN.Firstly,the fish body images are acquired by a home-made image acquisition device.Then,the fish images are preprocessed and labeled,and fed into the Mask R-CNN for training.Finally,the trained model is used to segment fish image,thus the morphological features indicators of the fish can be obtained.The experimental results demonstrate that the proposed scheme can segment the fish body in pure and complex backgrounds with remarkable performance.In pure background,the average relative errors(AREs)of all indicators measured all are less than 2.8%,and the AREs of body length and body width are less than 0.8%.In complex background,the AREs of all indicators are less than 3%,and the AREs of body length and body width is less than 1.8%.2020 China Agricultural University.Production and hosting by Elsevier B.V.on behalf of KeAi.This is an open access article under the CC BY-NC-ND license(http://gffzzeb6f7f563f66445dh9nxnuop9x06v6ppc.ffgz.tsg.suse.edu.cn/licenses/by-nc-nd/4.0/).1.Introduction With the advancing of its scientific and technological capabilities,China has made great achievements in the mariculture.The production accounts for more than 70%of the world’s overall mariculture output[1].The measurement of body length,body width and other morphological features of fish have wide application prospects in smart mariculture.Due to the difference in the quality and feeding ability of the Juvenile fish,the growth of the fish in the same pond is significantly different after a period of growth.Then,the fish needs to be classified.Grading can make fish grow better and improve feed utilization[2].The fish body length and body width are closely related to the weight of the fish.In the mariculture,the fishermen judge the growth of the fish by collecting the morphological feature of the fish,and use the information as an important reference for feeding,fishing and classification[3].At present,most of the measurement methods of fish body morphological features are manual,the operator usesmeasuring ruler to measure manually.It requires high technical level,and has high labor intensity and low efficiency.Furthermore,https://doi. 展开更多
关键词 Mask R-CNN Fish morphological feature Image segmentation Feature measurement
Revealing the Landform Types and Morphologic Features of Lunar Surface 认领 引用 被引量：2
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作者 CHENG Weiming 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第4期1517-1518,共2页
A lunar geologic map at a scale of 1：5000000 was finished in the 1970s by the National Aeronautics and Space Administration, U.S U.S. Geological Survey. Department of the Interior, Till now, the landform classificati... A lunar geologic map at a scale of 1：5000000 was finished in the 1970s by the National Aeronautics and Space Administration, U.S U.S. Geological Survey. Department of the Interior, Till now, the landform classification system and lunar morphologic mapping have not been clarified. The work aims to put forward a new landform classification system and to obtain index and map in the Sheet H010. Some key morphologic features of lunar surface were compared with those of the Earth. This research is very important for whole lunar morphologic mapping and unraveling evolutionary progress. 展开更多
关键词 than Revealing the Landform Types and Morphologic Features of Lunar Surface
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Arrhythmia Prediction on Optimal Features Obtained from the ECG as Images 认领 引用
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作者 Fuad A.M.Al-Yarimi 《Computer Systems Science & Engineering》 SCIE EI 2023年第1期129-142,共14页
A critical component of dealing with heart disease is real-time identifi-cation,which triggers rapid action.The main challenge of real-time identification is illustrated here by the rare occurrence of cardiac arrhythm... A critical component of dealing with heart disease is real-time identifi-cation,which triggers rapid action.The main challenge of real-time identification is illustrated here by the rare occurrence of cardiac arrhythmias.Recent contribu-tions to cardiac arrhythmia prediction using supervised learning approaches gen-erally involve the use of demographic features(electronic health records),signal features(electrocardiogram features as signals),and temporal features.Since the signal of the electrical activity of the heartbeat is very sensitive to differences between high and low heartbeats,it is possible to detect some of the irregularities in the early stages of arrhythmia.This paper describes the training of supervised learning using features obtained from electrocardiogram(ECG)image to correct the limitations of arrhythmia prediction by using demographic and electrocardio-graphic signal features.An experimental study demonstrates the usefulness of the proposed Arrhythmia Prediction by Supervised Learning(APSL)method,whose features are obtained from the image formats of the electrocardiograms used as input. 展开更多
关键词 ECG records electrocardiogram morphological features(MF) empirical mode decomposition algorithm HOS
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Morphologic and texture features in classifying the malignant and benign breast nodules in ultrasonography 认领 引用
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作者 陈秋霞 Xiang Jun +1 位作者 Liu Qi Liu Jian 《重庆医学》 CAS CSCD 北大核心 2014年第30期4046-4049,共4页
Objective To develop a computer-aided diagnosis(CAD)system with automatic contouring and morphologic and textural analysis to aid on the classification of breast nodules on ultrasound images.Methods A modified Level S... Objective To develop a computer-aided diagnosis(CAD)system with automatic contouring and morphologic and textural analysis to aid on the classification of breast nodules on ultrasound images.Methods A modified Level Set method was proposed to automatically segment the breast nodules(46malignant and 60benign nodules).Following,16morphologic features and 17texture features from the extracted contour were calculated and principal component analysis(PCA)was applied to find the optimal feature vector dimensions.Fuzzy C-means classifier was utilized to identify the breast nodule as benign or malignant with selected principal vectors.Results The performance of morphologic features was 78.30%for accuracy,67.39%for sensitivity and 86.67%for specificity,while the latter was 72.64%,58.70%and 83.33%,respectively.After the combination of the two features,the result was exactly the same with the morphologic performance.Conclusion This system performs well in classifying the malignant breast nodule from the benign breast nodule. 展开更多
关键词 computer-aided diagnosis breast neoplasms morphologic feature texture feature
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Larval Instars and Division Features of Apriona germari 认领 引用
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作者 Le Baothanh Ji Baozhong +3 位作者 Liu Shuwen Wang Guoxing Zhang Kai Wu Hua 《Plant Diseases and Pests》 2014年第4期1-5,共5页
Apriona germari larvae were obtained via sample collection in woodland and indoor rearing. In this study, larval instars were divided by Dyar＇s law, and the results showed that the larval stage of A. germari comprise... Apriona germari larvae were obtained via sample collection in woodland and indoor rearing. In this study, larval instars were divided by Dyar＇s law, and the results showed that the larval stage of A. germari comprised six instars, while the width of head capsule was the best instar-dividing structure. On the basis of instar division, tubercle numbers on the transverse furrow downside of first abdominal dorsal ambulatory ampullae, seta numbers of abdominal telson and lateral seta numbers of mandible were observed and statistically calculated. The accuracy of instar-dividing was verified by comparing with the Dyar＇s law. The coincidence rate of two instar-dividing results was 90. 47%. It is approved that the above morphological features could be used in instar division ofA. germari larvae. 展开更多
关键词 Apriona gerrnari Larval instars Dyar＇s law Morphological features
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Letter to the Editor Population genetics and origin of horticultural germplasm in Clematis via genotyping-by-sequencing 认领 引用
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作者 Yaping Hu Qingdi Hu +2 位作者 Xiaohua Ma Xule Zhang Jian Zheng 《Horticulture Research》 SCIE CSCD 2025年第3期387-389,共3页
Dear editor,Genetic diversity serves as a cornerstone of the viability of a species within its natural habitat and constitutes the fundamental basis for genetic enhancement in cultivars[1,2].The genus Clematis,a membe... Dear editor,Genetic diversity serves as a cornerstone of the viability of a species within its natural habitat and constitutes the fundamental basis for genetic enhancement in cultivars[1,2].The genus Clematis,a member of the family Ranunculaceae,is a widely cultivated ornamental plant celebrated for its ornate flowers and varied morphological features. 展开更多
关键词 genetic diversity clematis horticultural germplasm genetic enhancement cultivars genetic enhancement ornamental plant morphological features genotyping sequencing
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Area and volume ratios for prediction of visual outcome in idiopathic macular hole 认领 引用 被引量：12
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作者 Xing-Yun Geng Hui-Qun Wu +5 位作者 Jie-Hui Jiang Kui Jiang Jun Zhu Yi Xu Jian-Cheng Dong Zhuang-Zhi Yan 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2017年第8期1255-1260,共6页
AIM： To predict the visual outcome in patients undergoing macular hole surgery by two novel three-dimensional morphological parameters on optical coherence tomography （OCT）： area ratio factor （ARF） and volume ra... AIM： To predict the visual outcome in patients undergoing macular hole surgery by two novel three-dimensional morphological parameters on optical coherence tomography （OCT）： area ratio factor （ARF） and volume ratio factor （VRF）. METHODS： A clinical case series was conducted, including 54 eyes of 54 patients with an idiopathic macular hole （IMH）. Each patient had an OCT examination before and after surgery. Morphological parameters of the macular hole, such as minimum diameter, base diameter, and height were measured. Then, the macular hole index （Mill）, tractional hole index （THI）, and hole form factor （HFF） were calculated. Meanwhile, novel postoperative macular hole （MH） factors, ARF and VRF were calculated by three-dimensional morphology. Bivariate correlations were performed to acquire asymptotic significance values between the steady best corrected visual acuity （BCVA） after surgery and 2D/3D arguments of MH by the Pearson method with two-tailed test. All significant factors were analyzed by the receiver operating characteristic （ROC） curve analysis of SPSS software which were responsible for vision recovery. ROC curves analyses were performed to further discuss the different parameters on the prediction of visual outcome. RESULTS： The mean and standard deviation values of patients＇ age, symptoms duration, and follow-up time were 64.8＋8.9y （range： 28-81）, 18.6＋11.5d （range： 2-60）, and 11.4＋0.4mo （range： 6-24）, respectively. Steady-post-BCVA analyzed with bivariate correlations was found to be significantly correlated with base diameter （r＇0.521, P〈0.001）, minimum diameter （r=0.514, P〈0.001）, MHI （r -0.531, P〈0.001）, THI （r=-0.386, P=-0.004）, HFF （r=-0.508, P〈0.001）, and ARF （r=-0.532, P〈0.001）. Other characteristic parameters such as age, duration of surgery, height, diameter hole index, and VRF were not statistically significant with steady-post-BCVA. According to area under the curve （AUC） values, values of ARF, MHI, HFF, minimum diameter, THI, and base diameter are 0.806, 0.772, 0.750, 0.705, 0.690, and 0.686, respectively. However, Steady-post-BCVA analysis with bivariate correlations for VRF was no statistical significance. Results of ROC curve analysis indicated that the MHI value, HFF, and ARF was greater than 0.427, 1.027 and 1.558 respectively which could correlate with better visual acuity. CONCLUSION： Compared with MHI and HFF, ARF could effectively express three-dimensional characteristics of macular hole and achieve better sensitivity and specificity. Thus, ARF could be the most effective parameter to predict the visual outcome in macular hole surgery. 展开更多
关键词 optical coherent imaging prognostic evaluation idiopathic macular hole morphological features
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Bridge deck disease detection and screening method based on point cloud Gaussian curvature field 认领 引用
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作者 Liang Tang Xiangyu Zhang +2 位作者 Tong Wu Yijun Liu Xinyu Li 《Journal of Highway and Transportation Research and Development(English Edition)》 2025年第3期43-51,共9页
In order to efficiently and automatically detect and classify bridge deck diseases,a method using Gaussian curvature to detect bridge deck surface diseases is proposed.When there is a defect in the bridge paving surfa... In order to efficiently and automatically detect and classify bridge deck diseases,a method using Gaussian curvature to detect bridge deck surface diseases is proposed.When there is a defect in the bridge paving surface,there is a high-order discontinuity in the common boundary between the defect area and the non-defect area,that is,the surface Gaussian curvature value at the common boundary is a discontinuous change.According to the location and extent of Gaussian curvature mutation,the disease was located and quantified,and the disease was classified and screened by the Gaussian curvature value distribution feature and Hu rectangular morphological feature.For a 3D point cloud model of a concrete continuous girder bridge,the distribution of Gaussian curvature values in the paved area of the bridge deck was analyzed.The results show that the distribution of Gaussian curvature can characterize surface diseases such as pavement pits and loose spalling of the bridge,and this method is consistent with the assessment results of disease degree by traditional detection methods,and has high implementability,which provides a new technical approach for bridge deck disease assessment. 展开更多
关键词 bridge engineering bridge deck pavement disease 3D laser point cloud Gaussian curvature morphological feature vector
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RESEARCH ON SATELLITE IMAGE PROCESSING AND RECOGNITION WITH PARALLEL ALGORITHM  认领 引用 被引量：1
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作者 刘正光 郭爱民 +1 位作者 程彦 刘勇 《Transactions of Tianjin University》 CAS 1999年第2期73-77,共5页
Using the method of mathematical morphology,this paper fulfills filtration,segmentation and extraction of morphological features of the satellite cloud image.It also gives out the relative algorithms,which is realized... Using the method of mathematical morphology,this paper fulfills filtration,segmentation and extraction of morphological features of the satellite cloud image.It also gives out the relative algorithms,which is realized by parallel C programming based on Transputer networks.It has been successfully used to process the typhoon and the low tornado cloud image.And it will be used in weather forecast. 展开更多
关键词 satellite cloud image extraction of morphological features mathematical morphology parallel processing
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SEXUAL DIMORPHISM IN SEXUALLY MATURE GLYPTOSTERNUM MACULATUM IN TIBET AUTONOMOUS REGION,CHINA 认领 引用 被引量：5
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作者 PAN Ying-Zi LIU Hai-Ping +1 位作者 ZHOU Jian-She CHEN Mei-Qun 《水生生物学报》 CAS CSCD 北大核心 2018年第6期1203-1209,共7页
Sexual dimorphism refers to the morphological differentiation between males and females in the same population,such as sizes,morphological features,and colors.Cold water fish Glyptosternum maculatum,is an endemic tele... Sexual dimorphism refers to the morphological differentiation between males and females in the same population,such as sizes,morphological features,and colors.Cold water fish Glyptosternum maculatum,is an endemic teleost species of notable economic importance and with high potential for controlled rearing of the species in Tibet Autonomous Region.In this study,morphological measurements and related analysis were conducted on sexually mature G.maculatum to investigate their morphological differences in Tibet Autonomous Region.Results indicated the sexually mature populations indeed display really displayed significant sexual dimorphism:males exhibited significantly greater body length,weight,and males also exhibited in addition to greater tail length while females exhibited significantly greater eye diameter,body depth,trunk length,and lengths of dorsal,pectoral,pelvic,anal,and caudal fins at a given body length.Principal components analysis on 16 morphological parameters showed that the differences were largely due to features of the body shape(including lengths of body parts and fins)and the head,and differences in the above features differences contributed 76.7%.The t-statistic test on the allometry index b in the total lengthweight function showed that during the breeding season,the total lengths and weights of G.maculatum females developed proportionally,while the male specimens were allometrical. 展开更多
关键词 Glyptosternum maculatum Morphological features Sexual dimorphism
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Genome-wide core sets of SNP markers and Fluidigm assays for rapid and effective genotypic identification of Korean cultivars of lettuce(Lactuca sativa L.) 认领 引用 被引量：2
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作者 Jee-Soo Park Min-Young Kang +10 位作者 Eun-Jo Shim JongHee Oh Kyoung-In Seo Kyung Seok Kim Sung-Chur Sim Sang-Min Chung Younghoon Park Gung Pyo Lee Won-Sik Lee Minkyung Kim Jin-Kee Jung 《Horticulture Research》 SCIE CSCD 2022年第1期2602-2616,共15页
Lettuce is one of the economically important leaf vegetables and is cultivatedmainly in temperate climate areas.Cultivar identification based on the distinctness,uniformity,and stability(DUS)test is a prerequisite for... Lettuce is one of the economically important leaf vegetables and is cultivatedmainly in temperate climate areas.Cultivar identification based on the distinctness,uniformity,and stability(DUS)test is a prerequisite for new cultivar registration.However,DUS testing based on morphological features is time-consuming,labor-intensive,and costly,and can also be influenced by environmental factors.Thus,molecular markers have also been used for the identification of genetic diversity as an effective,accurate,and stable method.Currently,genome-wide single nucleotide polymorphisms(SNPs)using next-generation sequencing technology are commonly applied in genetic research on diverse plant species.This study aimed to establish an effective and high-throughput cultivar identification system for lettuce using core sets of SNP markers developed by genotyping by sequencing(GBS).GBS identified 17877 high-quality SNPs for 90 commercial lettuce cultivars.Genetic differentiation analyses based on the selected SNPs classified the lettuce cultivars into three main groups.Core sets of 192,96,48,and 24 markers were further selected and validated using the Fluidigm platform.Phylogenetic analyses based on all core sets of SNPs successfully discriminated individual cultivars that have been currently recognized.These core sets of SNP markers will support the construction of a DNA database of lettuce that can be useful for cultivar identification and purity testing,as well as DUS testing in the plant variety protection system.Additionally,this work will facilitate genetic research to improve breeding in lettuce. 展开更多
关键词 leaf vegetables genetic diversity cultivar identification single nucleotide polymorphisms lettuce morphological features genotyping sequencing Fluidigm
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Robust Magnification Independent Colon Biopsy Grading System over Multiple Data Sources 认领 引用 被引量：1
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作者 Tina Babu Deepa Gupta +3 位作者 Tripty Singh Shahin Hameed Mohammed Zakariah Yousef Ajami Alotaibi 《Computers, Materials & Continua》 SCIE EI 2021年第10期99-128,共30页
Automated grading of colon biopsy images across all magnifications is challenging because of tailored segmentation and dependent features on each magnification.This work presents a novel approach of robust magnificati... Automated grading of colon biopsy images across all magnifications is challenging because of tailored segmentation and dependent features on each magnification.This work presents a novel approach of robust magnification-independent colon cancer grading framework to distinguish colon biopsy images into four classes:normal,well,moderate,and poor.The contribution of this research is to develop a magnification invariant hybrid feature set comprising cartoon feature,Gabor wavelet,wavelet moments,HSV histogram,color auto-correlogram,color moments,and morphological features that can be used to characterize different grades.Besides,the classifier is modeled as a multiclass structure with six binary class Bayesian optimized random forest(BO-RF)classifiers.This study uses four datasets(two collected from Indian hospitals—Ishita Pathology Center(IPC)of 4X,10X,and 40X and Aster Medcity(AMC)of 10X,20X,and 40X—two benchmark datasets—gland segmentation(GlaS)of 20X and IMEDIATREAT of 10X)comprising multiple microscope magnifications.Experimental results demonstrate that the proposed method outperforms the other methods used for colon cancer grading in terms of accuracy(97.25%-IPC,94.40%-AMC,97.58%-GlaS,99.16%-Imediatreat),sensitivity(0.9725-IPC,0.9440-AMC,0.9807-GlaS,0.9923-Imediatreat),specificity(0.9908-IPC,0.9813-AMC,0.9907-GlaS,0.9971-Imediatreat)and F-score(0.9725-IPC,0.9441-AMC,0.9780-GlaS,0.9923-Imediatreat).The generalizability of the model to any magnified input image is validated by training in one dataset and testing in another dataset,highlighting strong concordance in multiclass classification and evidencing its effective use in the first level of automatic biopsy grading and second opinion. 展开更多
关键词 Colon cancer grading texture features color features morphological features feature extraction Bayesian optimized random forest classifier
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Clustering-driven watershed adaptive segmentation of bubble image 认领 引用 被引量：12
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作者 周开军 阳春华 +1 位作者 桂卫华 许灿辉 《Journal of Central South University》 SCIE EI CAS 2010年第5期1049-1057,共9页
In order to extract froth morphological feature,a bubble image adaptive segmentation method was proposed.Considering the image's low contrast and weak froth edges,froth image was coarsely segmented by using fuzzy ... In order to extract froth morphological feature,a bubble image adaptive segmentation method was proposed.Considering the image's low contrast and weak froth edges,froth image was coarsely segmented by using fuzzy c means(FCM) algorithm. Through the attributes of size and shape pattern spectrum,the optimal morphological structuring element was determined.According to the optimal parameters,some image noises were removed with an improved area opening and closing by reconstruction operation,which consist of image regional markers,and the bubbles were finely separated from each other by watershed transform.The experimental results show that the structural element can be determined adaptively by shape and size pattern spectrum,and the froth image is segmented accurately.Compared with other froth image segmentation method,the proposed method achieves much high accuracy,based on which,the bubble size and shape features are extracted effectively. 展开更多
关键词 flotation froth image adaptive segmentation pattern spectrum morphological feature
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Formation and development of stream potholes in a gorge in Guangdong 认领 引用 被引量：6
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作者 王为 梁明珠 黄山 《Journal of Geographical Sciences》 SCIE 2009年第1期118-128,共11页
The goal of this study is to provide information on the process of pothole growth on a gorge streambed.Pothole geometries were measured in a reach of the Dabu river bed at the head of a gorge more than 200 m deeply in... The goal of this study is to provide information on the process of pothole growth on a gorge streambed.Pothole geometries were measured in a reach of the Dabu river bed at the head of a gorge more than 200 m deeply incising into a 650-750 m high planation surface formed in the middle Miocene in northern Guangdong,China.Geometric and derivative data of the potholes obtained from fieldwork were interpreted using standard statistical methodologies.Our study shows that the formation and development of a stream pothole were only related to local conditions of a stream reach where the pothole occurs;the weaknesses,which are usually intersect fractures,typically interconnected vertical joints,or triangular pits generated by hitting of rock fragments during floods,initiate the pothole development on a streambed;the geometrical dimensions of the potholes are controlled by tectonic joints developed in bedrock of the stream reach;the radius and the depth of potholes are strongly(log) positive correlated;the pothole shapes and the flow patterns are inconstant during pothole growth;a pothole can be formed within a short period,but cannot be fully developed and maintained for a long time in a strong incision streambed.The finding in our study can improve the understanding of Quaternary environment in Guangdong. 展开更多
关键词 Guangdong gorge stream pothole morphological feature
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Magnetic resonance imaging findings of carcinoma arising from anal fistula: A retrospective study in a single institution 认领 引用 被引量：3
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作者 Xin Zhu Tian-Shu Zhu +1 位作者 Dan-Dan Ye Shao-Wei Liu 《World Journal of Clinical Cases》 SCIE 2020年第21期5159-5171,共13页
BACKGROUND Magnetic resonance imaging(MRI)is currently the standard investigation for suspected perianal diseases.Carcinoma arising from anal fistula is very rare,and early diagnosis is often difficult.AIM To describe... BACKGROUND Magnetic resonance imaging(MRI)is currently the standard investigation for suspected perianal diseases.Carcinoma arising from anal fistula is very rare,and early diagnosis is often difficult.AIM To describe and summarize the MRI findings of carcinoma arising from anal fistula.METHODS In this retrospective study,records of ten patients diagnosed with carcinoma arising from anal fistula and confirmed by surgery(n=7)or biopsy(n=3)between June 2006 and August 2018 were analyzed.All patients underwent preoperative pelvic MRI.Morphologic features,signal characteristics,fistula between the mass and the anus,contrast enhancement of mass,signal and enhancement of peritumoral areas,and regional lymphadenopathy were assessed.RESULTS All ten tumors were solitary(8 mucinous adenocarcinomas and 2 adenocarcinomas).The maximum diameter of the tumors ranged from 3.4 cm to 12.4 cm(median:4.15 cm;mean:5.68 cm).Eight patients had a fistula between the mass and the anus.Contrast enhancement of the peritumoral areas was noted in three(3/5)patients.Perirectal or inguinal lymphadenopathy was noted in seven patients.Most lesions of mucinous adenocarcinoma were multiloculated and cauliflower-like,with a thin capsule and focally unclear boundary.They were markedly hyperintense on fat-suppressed T2WI,slightly hyperintense with focal hyperintensity on diffusion-weighted imaging(DWI),and hyperintense with focal hypointensity on apparent diffusion coefficient(ADC)map,with progressive mesh-like contrast enhancement.Adenocarcinomas had an infiltrative margin without a capsule and appeared heterogeneously hyperintense or slightly hyperintense on fat-suppressed T2WI,hyperintense on DWI,and hypointense on ADC map,with persistent heterogeneous enhancement.CONCLUSION Our study highlighted several characteristic and potentially helpful MRI findings to diagnose carcinomas arising from anal fistula. 展开更多
关键词 Anal fistula Carcinoma Magnetic resonance imaging Morphologic features Signal characteristics Differential diagnosis
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Dynamic changes of a typical linear dune in the Tengger Desert 认领 引用 被引量：2
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作者 Zhang, KeCun Kai, KenJi +2 位作者 Qu, JianJun Ling, YuQuan Niu, QingHe 《Journal of Arid Land》 SCIE 2010年第4期272-278,共7页
The dynamical processes of a typical linear dune including morphological features, dune ridge swing range and crest height were investigated at different monitoring periods in the hinterland of Tengger Desert. The res... The dynamical processes of a typical linear dune including morphological features, dune ridge swing range and crest height were investigated at different monitoring periods in the hinterland of Tengger Desert. The results indicated that the development of linear dune depends on not only the northwesterly prevailing wind, but also the winds from northeast and southwest. The dune ridge swayed along its fundamental strike and took on an eastward movement gradually. The original dune strike was NW70° on August 3, 1994, and then changed to NE15° on April 21, 2001. The dune crest increased by 1.8 m longitudinally, which manifested strong wind-blown sand activities in this region. Wind erosion frequently occured at the bottom of sand dune, while sand accumulation appeared on its mid-upper section. The mean wind erosion depth was 25 cm on the bottom of linear dune and the height difference of the control points on the dune’s ridge was 1.13 m. Although the linear dune swayed laterally, the horizontal displacement of its ridge moved eastward 5.8 m averagely. The swing range of the dune crest line is very distinct, with a maximum value of 13.2 m. The highest site on the K-profile swayed on both sides of the dune ridge and the heights were 19.88 m at the control point K5, 19.61 m at K6 and 19.05 m at K7, respectively. The results indicated that the lateral swing of the linear dune was distinct under the northwesterly wind and it moved toward east gradually. 展开更多
关键词 linear sand dune dynamic change morphological feature Tengger Desert
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