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Construction of Conflict-Free and Efficient Cross-Organization Emergency Response Processes:A Petri Net-Based Approach 认领 引用
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作者 Qi Mo Shichao Wei +3 位作者 Yuhang Zuo Chengting Jiang Fei Dai Cong Liu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第6期1492-1511,共20页
Usually,the disposal of the emergency is organized as a cross-organization emergency response process(CERP),where various resources are involved.The lack of these resources may cause resource conflicts that can delay ... Usually,the disposal of the emergency is organized as a cross-organization emergency response process(CERP),where various resources are involved.The lack of these resources may cause resource conflicts that can delay or even suspend the CERP,thereby increasing the risk imposed on life,property,and the environment.In this paper,we propose a novel approach to construct conflict-free and efficient CERPs.This approach first presents a branching place-based method to decompose a CERP into a set of execution paths.In essence,an execution path refers to a process fragment without choice structures corresponding to some kind of process instance in the CERP.In practice,each execution of the CERP can only follow such an execution path.Next,it determines whether each execution path contains resource conflicts.If not,then the execution path is considered conflict-free;otherwise,it will be resolved using a delay-based strategy.Lastly,it introduces an execution path-oriented strategy to merge all originally conflict-free and resolved execution paths to form a resolved CERP,in which each execution of it is conflict-free and efficient.The proposed approach is implemented in the tool RCTool,and a group of experiments conducted on actual CERPs demonstrates that it is more effective in constructing conflict-free and efficient CERPs compared to existing proposals,and its computation overhead is also acceptable in practice. 展开更多
关键词 Conflict-free cross-organization emergency response processes Petri net efficient construction
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Multi-waveform transfer learning for predicting electromagnetic sensitivity of integrated modular avionics power modules in complex environment 认领 引用
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作者 Yuntao JIN Fei DAI +2 位作者 Xingye CHEN Lingnan SONG Aixin CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第4期494-510,共17页
Understanding the electromagnetic compatibility of power modules in complex electromagnetic environments is critical for the safety of integrated modular avionics.However,fully testing the module against various Elect... Understanding the electromagnetic compatibility of power modules in complex electromagnetic environments is critical for the safety of integrated modular avionics.However,fully testing the module against various Electro Magnetic Interference(EMI)waveforms is time-consuming and labor-intensive.To address this challenge,we propose a deep-learning-based approach,termed Multi-waveform Transfer Learning(MWTL),building a unified model to predict module responses across multiple interference waveforms.MWTL utilizes a Convolutional Neural Network-Long Short-Term Memory(CNN-LSTM)architecture to effectively extract the temporal features and build the relation between the interference signals and the response signals.In addition,by leveraging shared features across different scenarios,a Transfer Learning(TL)strategy is applied,generalizing the model into unseen interference waveforms,thereby reducing the need for extensive training data in new tasks.The experimental results show that the proposed method delivers excellent predictive performance across various types of interference,maintaining high accuracy even with limited data.In particular,by transferring shared features from multitask learning to new tasks,the approach significantly reduces data requirements for new scenarios while preserving prediction accuracy. 展开更多
关键词 Electromagnetic compatibility Integrated modular avionics Power module Deep learning Transfer learning
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Self-supervised denoising strategies for multimodality light-field microscopy 认领 引用
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作者 Xuyu Zeng Xingye Chen +2 位作者 Zhifeng Zhao Yuanlong Zhang Fei Dai 《Advanced Photonics Nexus》 CSCD 2026年第5期57-68,共12页
Light-field fluorescence microscopy(LFM)enables high-speed volumetric imaging by capturing 3D information in a single snapshot.However,its reconstruction quality is severely degraded by detection noise.We propose SSD-... Light-field fluorescence microscopy(LFM)enables high-speed volumetric imaging by capturing 3D information in a single snapshot.However,its reconstruction quality is severely degraded by detection noise.We propose SSD-LFM,a self-supervised denoising framework that incorporates physical models,to substantially remove noise-induced artifacts in multimodality LFM.The SSD-LFM model is trained exclusively on low-signal-to-noise ratio(SNR)data,bypassing the need for paired noisy-clean datasets for network training.The denoising performance of SSD-LFM is validated on conventional LFM,scanning LFM(sLFM),and two-photon excitation LFM(TP-LFM).Comprehensive evaluations on both simulated and experimental data demonstrate that SSD-LFM achieves artifact-free 3D reconstruction with over 5-fold fewer photons.For time-lapse imaging,the self-supervised architecture further enables SSD-LFM to operate only on the collected noisy raw data,overcoming generalization constraints inherent in supervised methods.Due to the significantly improved quality under low-SNR excitation,SSD-LFM enables long-term volumetric observation of phototoxicity-vulnerable bioprocesses. 展开更多
关键词 light-field microscopy imaging denoising self-supervised learning
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Distortion-Free Zeeman Torque Sampling for Detecting Terahertz Magnetic Field Pulse 认领 引用
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作者 Chun-yan Geng Yi-chen Su +3 位作者 De-yin Kong Fei Dai Cheng-song Xiao-jun Wu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第11期383-392,共10页
Strong-field terahertz(THz) radiation holds significant potential in non-equilibrium state manipulation, electron acceleration, and biomedical effects. However, distortion-free detection of strong-field THz waveforms ... Strong-field terahertz(THz) radiation holds significant potential in non-equilibrium state manipulation, electron acceleration, and biomedical effects. However, distortion-free detection of strong-field THz waveforms remains an essential challenge in THz science and technology. To address this issue, we propose a ferromagnetic detection scheme based on Zeeman torque sampling, achieving distortion-free strong-field THz waveform detection in Py films. Thickness-dependent characterization(3–21 nm) identifies peak detection performance at 21 nm within the investigated range. Furthermore, by structurally engineering the Py ferromagnetic layer, we demonstrate strong-field THz detection in symmetric Ta(3 nm)/Py(9 nm)/Ta(3 nm) heterostructure while simultaneously resolving Zeeman torque responses and collective spin-wave dynamics in asymmetric W(4 nm)/Py(9 nm)/Pt(2 nm)heterostructure. We calculated spin wave excitations and spin orbit torque distributions in asymmetric heterostructures, along with spin wave excitations in symmetric modes. This approach overcomes the sensitivity limitations of conventional techniques in strong-field conditions. 展开更多
关键词 distortion free detection terahertz magnetic field ferromagnetic detection scheme py films strong field terahertz radiation zeeman torque sampling biomedical effects electron acceleration
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Alcohol consumption and metabolic syndrome among Shanghai adults: A randomized multistage stratified cluster sampling investigation 认领 引用 被引量：14
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作者 Jian-Gao Fan Xiao-Bu Cai +3 位作者 Lui Li Xing-Jian Li Fei Dai Jun Zhu 《World Journal of Gastroenterology》 SCIE CAS 2008年第15期2418-2424,共7页
AIM: To examine the relations of alcohol consumption to the prevalence of metabolic syndrome in Shanghai adults. METHODS: We performed a cross-sectional analysis of data from the randomized multistage stratified clust... AIM: To examine the relations of alcohol consumption to the prevalence of metabolic syndrome in Shanghai adults. METHODS: We performed a cross-sectional analysis of data from the randomized multistage stratified cluster sampling of Shanghai adults, who were evaluated for alcohol consumption and each component of metabolic syndrome, using the adapted U.S. National Cholesterol Education Program criteria. Current alcohol consumption was defined as more than once of alcohol drinking per month. RESULTS: The study population consisted of 3953 participants (1524 men) with a mean age of 54.3 ± 12.1 years. Among them, 448 subjects (11.3%) were current alcohol drinkers, including 405 males and 43 females. After adjustment for age and sex, the prevalence of current alcohol drinking and metabolic syndrome in the general population of Shanghai was 13.0% and 15.3%, respectively. Compared with nondrinkers, the prevalence of hypertriglyceridemia and hypertension was higher while the prevalence of abdominal obesity, low serum high-density-lipoprotein cholesterol (HDL-C) and diabetes mellitus was lower in subjects who consumed alcohol twice or more per month, with a trend toward reducing the prevalence of metabolic syndrome. Among the current alcohol drinkers, systolic blood pressure, HDL-C, fastingplasma glucose, and prevalence of hypertriglyceridemia tended to increase with increased alcohol consumption. However, low-density-lipoprotein cholesterol concentration, prevalence of abdominal obesity, low serum HDL-C and metabolic syndrome showed the tendency to decrease. Moreover, these statistically significant differences were independent of gender and age.CONCLUSION: Current alcohol consumption is associated with a lower prevalence of metabolic syndrome irrespe- ctive of alcohol intake (g/d), and has a favorable influence on HDL-C, waist circumference, and possible diabetes mellitus. However, alcohol intake increases the likelihood of hypertension, hypertriglyceridemia and hyperglycemia. The clinical significance of these findings needs further investigation. 展开更多
关键词 Alcohol Metabolic syndrome Obesity Type2 diabetes Epidemiology Chinese
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Design of scale model of plate-shaped absorber in a wide frequency range 认领 引用 被引量：1
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作者 Li-Ming Yuan Yong-Gang Xu +2 位作者 Wei Gao Fei Dai Qi-Lin Wu 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第4期299-304,共6页
In order to design the scale model in a wide frequency range,a method based on the reflective loss is proposed according to the high-frequency approximation algorithm,and an example of designing the scale model of a p... In order to design the scale model in a wide frequency range,a method based on the reflective loss is proposed according to the high-frequency approximation algorithm,and an example of designing the scale model of a plate-shaped absorber is given in this paper.In the example,the frequency of the full-size measurement ranges from 2.0 GHz to 2.4 GHz,the thickness of the full-size absorber is 1 mm and the scale ratio is 1/5.A two-layer scale absorber is obtained by the proposed method.The thickness values of the bottom and top layer are 0.4 mm and 0.5 mm,respectively.Furthermore,the scattering properties of a plate model and an SLICY model are studied by FEKO to verify the effectiveness of the designed scale absorber.Compared with the corresponding values from the theoretical scale model,the average values of the absolute deviations in 10 GHz～12 GHz are 0.53 d Bm^2,0.65 d Bm^2,0.76 d Bm^2 for the plate model and 0.20 d Bm^2,0.95 d Bm^2,0.77 d Bm^2 for the SLICY model while the incident angles are 0°,30°,and 60°,respectively.These deviations fall within the Radar cross section（RCS） measurement tolerance.Thus,the work in this paper has important theoretical and practical significance. 展开更多
关键词 scale model plate-shaped absorber wide frequency range RCS
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基于图像和飞行时间的基础设施三维重建技术比较 认领 引用 被引量：2
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作者 蔡建国 Fei Dai +1 位作者 Abbas Rashidi loannis Brilakis 《四川建材》 2021年第2期39-45,共7页
竣工空间数据在众多与建筑相关的应用方面颇为实用,例如质量控制和进度监控。这些数据可以通过使用多种基于图像和基于飞行时间的(例如激光扫描)传感器法来收集。每种应用都对数据的精度和质量水平有特定要求,但几乎没有什么信息可以帮... 竣工空间数据在众多与建筑相关的应用方面颇为实用,例如质量控制和进度监控。这些数据可以通过使用多种基于图像和基于飞行时间的(例如激光扫描)传感器法来收集。每种应用都对数据的精度和质量水平有特定要求,但几乎没有什么信息可以帮助工程师选择最具成本效益的数据收集方法。本文对摄影测量法、摄像测量法和基于飞行时间法在精度、质量、时间效率和成本方面进行了分析和定量比较。为此,对具有代表性的基于图像的三维重建软件和商用硬件(两台相机和一台飞行时间激光扫描仪)进行了评价。使用不同的设置收集了典型基础设施(2座桥梁和1栋楼)的空间数据。实验参数包括成像传感器的相机类型、分辨率和拍摄距离。通过将这些数据与全站仪收集的地面实况进行比较,发现摄像/摄影测量可以产生中等精度和质量的结果,但成本比激光扫描低得多。所获得的信息有助于工程师做出具有成本效益的决策,并帮助研究人员更好地了解这些设置对传感器技术的性能影响。 展开更多
关键词 三维重建 空间数据收集 激光扫描 摄影测量 摄像测量 测量精度 比较研究
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Detection and mitigation of RFI in SBRS observation data 认领 引用
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作者 Zhen-Ping Qiang Jun Cheng +3 位作者 Zhen-Hong Shang Kai-Fan Ji Fei Dai Hui Liu 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2021年第8期111-123,共13页
In view of the inconsistency of channel gains and a large amount of interference noise in Solar Broadband Radio Spectrometer(SBRS) observation data,they will seriously affect the analysis of SBRS data.In this paper,a ... In view of the inconsistency of channel gains and a large amount of interference noise in Solar Broadband Radio Spectrometer(SBRS) observation data,they will seriously affect the analysis of SBRS data.In this paper,a method of Radio Frequency Interference(RFI) detection and mitigation for SBRS observation data is reported.Firstly,the SBRS observation data are preprocessed,a part of the observation data was selected to calculate the mean and variance to achieve the normalization of the entire observation data,which can avoid the influence of strong noise on the normalization result.Furthermore,we proposed an adaptive threshold RFI detection method based on fusion wavelet transform reconstruction and an RFI elimination method based on neighborhood weighted filling.It is worth mentioning that to detect RFI interference signals of different magnitudes,we adopted an iterative approach to the RFI detection and mitigation process.Through qualitative analysis of real observation data and quantitative analysis of simulated data,it is shown that the method proposed in this paper can effectively eliminate RFI in SBRS observation data,and improve the quality of observation data for further scientific analysis. 展开更多
关键词 spectrographs:SBRS techniques:image processing and spectroscopic Sun:radio radiation
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Data Masking for Chinese Electronic Medical Records with Named Entity Recognition 认领 引用 被引量：1
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作者 Tianyu He Xiaolong Xu +3 位作者 Zhichen Hu Qingzhan Zhao Jianguo Dai Fei Dai 《Intelligent Automation & Soft Computing》 SCIE 2023年第6期3657-3673,共17页
With the rapid development of information technology,the electronifi-cation of medical records has gradually become a trend.In China,the population base is huge and the supporting medical institutions are numerous,so ... With the rapid development of information technology,the electronifi-cation of medical records has gradually become a trend.In China,the population base is huge and the supporting medical institutions are numerous,so this reality drives the conversion of paper medical records to electronic medical records.Electronic medical records are the basis for establishing a smart hospital and an important guarantee for achieving medical intelligence,and the massive amount of electronic medical record data is also an important data set for conducting research in the medical field.However,electronic medical records contain a large amount of private patient information,which must be desensitized before they are used as open resources.Therefore,to solve the above problems,data masking for Chinese electronic medical records with named entity recognition is proposed in this paper.Firstly,the text is vectorized to satisfy the required format of the model input.Secondly,since the input sentences may have a long or short length and the relationship between sentences in context is not negligible.To this end,a neural network model for named entity recognition based on bidirectional long short-term memory(BiLSTM)with conditional random fields(CRF)is constructed.Finally,the data masking operation is performed based on the named entity recog-nition results,mainly using regular expression filtering encryption and principal component analysis(PCA)word vector compression and replacement.In addi-tion,comparison experiments with the hidden markov model(HMM)model,LSTM-CRF model,and BiLSTM model are conducted in this paper.The experi-mental results show that the method used in this paper achieves 92.72%Accuracy,92.30%Recall,and 92.51%F1_score,which has higher accuracy compared with other models. 展开更多
关键词 Named entity recognition Chinese electronic medical records data masking principal component analysis regular expression
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Analyzing and relieving the thermal issues caused by fabrication details of a deuterium cryogenic target 认领 引用 被引量：1
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作者 Hong Yang Shasha Gao +8 位作者 Baibin Jiang Jun Xie Juxi Liang Xiaobo Qi Kai Wang Chaoyou Tao Fei Dai Wei Lin Juan Zhang 《Matter and Radiation at Extremes》 SCIE EI CSCD 2021年第5期39-53,共15页
In inertial confinement fusion experiments,fuel quality is determined mainly by the thermal environment of the capsule in the layering procedure.Owing to the absence of a radial thermal gradient,formed deuterium–deut... In inertial confinement fusion experiments,fuel quality is determined mainly by the thermal environment of the capsule in the layering procedure.Owing to the absence of a radial thermal gradient,formed deuterium–deuterium(DD)ice shells in the capsule are thermally instable.To obtain a solid DD layer with good quality and long lifetime,stringent demands must be placed on the thermal performance of cryogenic targets.In DD cryogenic target preparation,two issues arise,even after the capsule’s temperature uniformity has been improved by the use of thick aluminized films.The first is the inconsistent ice shape,which is related to the capsule’s thermal field.In this article,some typical fabrication details are investigated,including adhesive penetration during assembly,the presence of the fill tube,the optical properties of the hohlraum and film surfaces,the jacket–hohlraum connection,deviations in capsule location,and asymmetrical contact at the arm–jacket interfaces.Detailed comparisons of the thermal effects of these factors provide guidance for target optimization.The second issue is the instability of seeding crystals in the fill tube due to unsteadiness of the direction of the thermal gradient in the fill tube assembly.An additional thermal controller is proposed,analyzed,and optimized to provide robust controllability of tube temperature.The analysis results and optimization methods presented in this article should not only help in dealing with thermal issues associated with DD cryogenic targets,but also provide important references for engineering design of other cryogenic targets. 展开更多
关键词 temperature field thermal
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Person Re-Identification with Model-Contrastive Federated Learning in Edge-Cloud Environment 认领 引用 被引量：1
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作者 Baixuan Tang Xiaolong Xu +1 位作者 Fei Dai Song Wang 《Intelligent Automation & Soft Computing》 SCIE 2023年第10期35-55,共21页
Person re-identification(ReID)aims to recognize the same person in multiple images from different camera views.Training person ReID models are time-consuming and resource-intensive;thus,cloud computing is an appropria... Person re-identification(ReID)aims to recognize the same person in multiple images from different camera views.Training person ReID models are time-consuming and resource-intensive;thus,cloud computing is an appropriate model training solution.However,the required massive personal data for training contain private information with a significant risk of data leakage in cloud environments,leading to significant communication overheads.This paper proposes a federated person ReID method with model-contrastive learning(MOON)in an edge-cloud environment,named FRM.Specifically,based on federated partial averaging,MOON warmup is added to correct the local training of individual edge servers and improve the model’s effectiveness by calculating and back-propagating a model-contrastive loss,which represents the similarity between local and global models.In addition,we propose a lightweight person ReID network,named multi-branch combined depth space network(MB-CDNet),to reduce the computing resource usage of the edge device when training and testing the person ReID model.MB-CDNet is a multi-branch version of combined depth space network(CDNet).We add a part branch and a global branch on the basis of CDNet and introduce an attention pyramid to improve the performance of the model.The experimental results on open-access person ReID datasets demonstrate that FRM achieves better performance than existing baseline. 展开更多
关键词 Person re-identification federated learning contrastive learning
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Toxicity Test of Different Pesticides on Tobacco Root-knot Nematodes 认领 引用 被引量：2
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作者 Fei DAI Peibo LI +1 位作者 Quan ZHANG Enfa CHEN 《Agricultural Biotechnology》 2020年第5期86-89,共4页
[Objectives]This study was conducted to quickly screen out effective and safe agents for controlling tobacco root knot nematode disease.[Methods]Six pesticides were tested and screened indoors at five different concen... [Objectives]This study was conducted to quickly screen out effective and safe agents for controlling tobacco root knot nematode disease.[Methods]Six pesticides were tested and screened indoors at five different concentrations.[Results]The six pesticides all had toxic effects on the second-instar larvae of tobacco root-knot nematode,and the corrected mortality was positively correlated with the concentration and time of the pesticides,with the correlation coefficients above 0.8.From the perspective of inhibitory activity,the order was fosthiazate>abamectin>emamectin benzoate>cadusafos>ethoprophos>carbosulfan.Four pesticides that can be used in the field were selected.[Conclusions]This study provides a theoretical basis for field pesticide selection. 展开更多
关键词 Tobacco Root-knot nematode Medicament Virulence determination Screening
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Impacts of Different Weeding Methods on Weeds Control in Tobacco Fields in Anshun City 认领 引用 被引量：1
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作者 Fei Dai Hongbo Wan +3 位作者 Huijuan Dai Xiquan Li Yuan Xue Quan Zhang 《Plant Diseases and Pests》 2021年第3期4-8,共5页
[Objective] The paper was to explore weed control measures in tobacco fields in Anshun City. [Method] Different treatments on weed control were conducted in tobacco fields in Anshun City, Guizhou Province, from 2017 t... [Objective] The paper was to explore weed control measures in tobacco fields in Anshun City. [Method] Different treatments on weed control were conducted in tobacco fields in Anshun City, Guizhou Province, from 2017 to 2019. [Result] Various treatments had no negative effect on tobacco plant growth in the field, and had different degrees of control effects on five dominant weeds, including Digitaria sanguinalis, Setaria viridis, Fagopyrum dibotrys, Commelina communis and Chenopodium album. White mulching film and 50% butralin·clomazone EC 160 m L/667 m2 + white mulching film had the worst performance, which had extremely significant or significant differences with other treatments. There was no sig-nificant difference among most treatments, and the overall effects were comprehensive(multi-factor) treatment > double factor treatment > single factor treatment. [Conclusion] Combination control is recommended in practical tobacco production. 展开更多
关键词 Tobacco field Weed Control effect Impact
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丘陵山地胡麻联合收割机作业参数优化与试验 认领 引用 被引量：8
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作者 史瑞杰 戴飞 +3 位作者 赵武云 刘小龙 瞿江飞 张锋伟 《吉林大学学报（工学版）》 EI CAS CSCD 北大核心 2022年第11期2746-2755,共10页
为提高丘陵山地胡麻联合收割机工作效率,该研究以作业机前进速度、脱粒滚筒转速和吸杂风机转速为自变量,以脱净率、总损失率和籽粒含杂率为响应值,依照Box-Behnken试验设计原理,采用三因素三水平响应面分析方法分别建立各因素与响应值... 为提高丘陵山地胡麻联合收割机工作效率,该研究以作业机前进速度、脱粒滚筒转速和吸杂风机转速为自变量,以脱净率、总损失率和籽粒含杂率为响应值,依照Box-Behnken试验设计原理,采用三因素三水平响应面分析方法分别建立各因素与响应值间的数学模型,并对各因素及其交互作用进行分析。结果表明:3个因素对脱净率影响的主次顺序为脱粒滚筒转速、前进速度和吸杂风机转速,对总损失率影响的主次顺序为前进速度、吸杂风机转速和脱粒滚筒转速,对籽粒含杂率影响的主次顺序为吸杂风机转速、脱粒滚筒转速和前进速度;作业机最佳工作参数如下:前进速度为0.65 m/s、脱粒滚筒转速为830.3 r/min、吸杂风机转速为1154.39 r/min。在最优工作参数下作业机脱净率、总损失率和籽粒含杂率均值分别为96.33%、1.87%和3.24%,说明在该作业参数下作业机能够降低收获总损失和籽粒含杂率。 展开更多
关键词 农业机械 联合收割机 胡麻 丘陵山地 参数优化
Effects of Different Analog Water-soluble Fertilizers on Flue-cured Tobacco 认领 引用 被引量：3
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作者 Fei DAI Xiquan LI +1 位作者 Yuan XUE Xingping YANG 《Agricultural Science & Technology》 CAS 2017年第10期1904-1907,1920,共4页
This study aimed to investigate the application effect of analog water-soluble fertilizer as an alternative of flue-cured tobacco-specific topdressing fertilizer. A field experiment was conducted, and the dry matter a... This study aimed to investigate the application effect of analog water-soluble fertilizer as an alternative of flue-cured tobacco-specific topdressing fertilizer. A field experiment was conducted, and the dry matter accumulation, intrinsic chemical composition, smoking quality and economic benefit of flue-cured tobacco were compared between analog water-soluble fertilizer and conventional fertilizer, The results showed compared with conventional fertilizer, analog water-soluble fertilizer increased the dry matter accumulation in flue-cured tobacco by 4.90%-16.70%, increased the yield of flue-cured tobacco by 6%-15%, and increased the output of flue-cured tobacco by 5%-14%. In terms of chemical composition, the flue-cured tobacco applied with analog water-soluble fertilizer was better than that applied with conventional fertilizer, except the nicotine content in the upper leaves, the potassium content in the middle leaves and the reducing sugar content. The smoking quality of both the upper and middle leaves of flue-cured tobacco in the analog water-soluble fertilizer treatment groups was better than that in the conventional fertilizer treatment group. In short, analog water-soluble fertilizer was better than conventional fertilizer, with advantages of lower cost （reduced by 381.60 yuan/hm2）, lower application amount （reduced by 165 kg/hm2） and higher utilization efficiency. 展开更多
关键词 Analog water-soluble fertilizer Flue-cured tobacco Effect Study
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Effect of Trap Space Layout on Trapped Number of Spodoptera litura in Tobacco Field 认领 引用
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作者 Fei DAI Xiquan LI +2 位作者 Xingping YANG Hao QIN Rui ZUO 《Agricultural Biotechnology》 2019年第1期93-96,共4页
[Objectives] This study was to find out the effect of trap space layout on the trapped number of Spodoptera litura in tobacco field. [Methods]From2015 to 2017,investigations were made using different hanging heights,d... [Objectives] This study was to find out the effect of trap space layout on the trapped number of Spodoptera litura in tobacco field. [Methods]From2015 to 2017,investigations were made using different hanging heights,distances( densities) and equidistant plane layout in the tobacco planting area in central Guizhou Province. [Results] The trapped number of S. litura was different at different hanging heights of the trap,and some had the difference reached the5% significant level in the trapped number. The optimum hanging height was 1. 5-2. 0 m. The trapping effect was the best at the field layout distance of20. 0-30. 0 m( density of 5-8 traps/hm^2). Under the conditions of even distribution at the equal distance between traps of 40.0 m in the field,the accumulated trapped number of S. litura from April to August was in the order of outer ring > central ring > inner ring,presenting the zonal distribution. The difference in the trapped numbers was significant among different rings,reaching the 5% significant level. [Conclusions]This study provided theoretical bases for the physiochemical control of S. litura in tobacco field. 展开更多
关键词 Trap Tobacco field Space layout Spodoptera litura Trapped number Effect
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基于全基因组测序对双重耐药幽门螺杆菌外排泵基因变异的研究 认领 引用
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作者 叶淑芳 张剑美 +5 位作者 代飞 蓝陈菊 章小君 周丽珍 汤清清 孟飞 《世界华人消化杂志》 CAS 2021年第9期455-460,共6页
背景世界上50%以上的人口感染幽门螺杆菌(Helicobacter pylori,H.pylori).随着抗生素的广泛使用,抗生素耐药成为H.pylori感染患者根除失败的主要原因.目前有不少研究报道外排泵基因过表达和耐药的产生相关.目的为了未来的H.pylori感染... 背景世界上50%以上的人口感染幽门螺杆菌(Helicobacter pylori,H.pylori).随着抗生素的广泛使用,抗生素耐药成为H.pylori感染患者根除失败的主要原因.目前有不少研究报道外排泵基因过表达和耐药的产生相关.目的为了未来的H.pylori感染治疗有更多方法,探索外排泵基因的变异与双重耐药菌株耐药性产生的内在联系.方法使用13C呼气试验及药物敏感试验进行双重耐药菌株及敏感菌株的筛选,用特异性PCR的常规方法进行耐药基因突变位点的验证,基于MiSeq平台,对10例临床菌株进行全基因组测序,以鉴定双重耐药表型与敏感表型的外排泵基因的单核苷酸变体(single nucleotide variants,SNV)并分析,参考菌株使用ATCC26695.结果H.pylori药敏试验结果显示,丽水地区H.pylori对克拉霉素及左氧氟沙星都具有较高的耐药率.采用特异性PCR法在5株临床双重耐药菌株中检测到23S rRNA基因及gyrA的点突变,在5株临床敏感菌株中未检测到.全基因测序检测了涉及多耐药性的TolC同源物的四个基因簇(HP0605-HP0607,HP0971-HP0969,HP1327-HP1329和HP1489-HP1487)的遗传变异.在双重耐药性H.pylori菌株中发现一个突变的SNV.结论丽水地区抗生素使用应严格监控,避免滥用.TolC同源基因的基因簇与H.pylori菌株的抗生素耐药性相关.全基因组测序对基因型与表型的关系有了新的认识. 展开更多
关键词 双重耐药菌株 幽门螺杆菌 全基因组测序 耐药性 外排泵基因
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The lack and construction of teaching communication in Physical Education in Colleges and universities 认领 引用
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作者 Fei Dai Beilei Chen 《International Journal of Technology Management》 2016年第12期45-47,共3页
Teachers and students are the two main subjects which are indispensable in the teaching activities. Their communication is the most basic activity in the whole teaching activities. The social economy in our country is... Teachers and students are the two main subjects which are indispensable in the teaching activities. Their communication is the most basic activity in the whole teaching activities. The social economy in our country is developing and changing constantly, and the teaching reform has been changed, and it has been well developed. Physical education is a very important component in the teaching structure of colleges and universities, and the teaching of physical education has been highly concerned by people. But in the sports teaching practice, in？ uenced by traditional teaching ideas and teaching skills, communication of PE Teaching in Colleges and universities appeared unilateral and simple phenomenon, directly affect the quality and efficiency of teaching. We should figure out how to avoid the lack of teaching communication in college physical education, in order to make the relationship between teachers and students, students and students more harmonious, and promote the improvement of the efficiency of sports teaching. This article mainly focus on the teaching concept, we discuss and analyze the problems and reasons in the teaching of physical education in Colleges and Universities and put forward a new sports teaching communication construction strategy, the purpose is to provide some support and help to the university physical education teaching activities. 展开更多
关键词 Physical education in Universities Teaching communication deficiency Construction strategy
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Calibration of DEM parameters for coated sunflower seeds based on dynamic stacking angle 认领 引用
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作者 Changji Liu Wuyun Zhao +4 位作者 Bin Feng Linrong Shi Bugong Sun Fei Dai Hui Li 《International Journal of Agricultural and Biological Engineering》 SCIE 2026年第1期283-294,共12页
To address the errors associated with the application of existing Discrete Element Method simulation parameters in roller-type precision seeders,this study focused on calibrating the key contact parameters of the‘Xin... To address the errors associated with the application of existing Discrete Element Method simulation parameters in roller-type precision seeders,this study focused on calibrating the key contact parameters of the‘Xinhe No.1’coated confectionary sunflower seeds,so as to provide a reliable simulation foundation for the optimization of the seeders.Through dynamic stacking angle experiments and comparative trials involving confectionary sunflowers(including Xinhe No.1)and oil sunflowers with significantly different physical properties,the optimal working conditions for the rotating drum were determined as a rotation speed of 10 r/min,304 Stainless Steel as the inner wall material,and a filling ratio of 30%.The study also clarified the variation patterns of the dynamic stacking angle.Physical experiments were conducted to measure the static friction coefficients,restitution coefficients,and inter-seed restitution coefficients between Xinhe No.1 seeds and three materials:304 Stainless Steel,Q235 Steel,and ABS Plastic.The physical dynamic stacking angle was obtained via a rotating drum experiment.A single-factor experiment was used to determine the range of simulation parameters,and a second-order orthogonal experiment was conducted using Design-Expert software to optimize contact parameters with the physical dynamic stacking angle as the target.The parameters were subsequently validated using the Discrete Element Method(DEM)simulation software EDEM 2022.3,hereinafter abbreviated as EDEM simulations.Finally,rolling friction coefficients between seeds and Q235 Steel and ABS Plastic were obtained through both simulation and physical experiments using alternative contact materials.The results showed that the static friction coefficients between Xinhe No.1 and 304 Stainless Steel,Q235 Steel,and ABS Plastic were 0.32,0.36,and 0.25,respectively;the restitution coefficients were 0.42,0.39,and 0.32;and the rolling friction coefficients were 0.012,0.011,and 0.010.The measured values of the inter-seed static friction coefficient,restitution coefficient,and rolling friction coefficient were 0.31,0.43,and 0.010,respectively.The relative error between simulated and physical stacking angles was<1.5%.Calibrated DEM parameters for Xinhe No.1 coated sunflower seeds provide a theoretical basis for optimizing the design of sunflower precision seeders. 展开更多
关键词 sunflower seed DEM parameter calibration dynamic stacking angle hill-drop planter
肱二头肌长头腱固定术对50岁以上Neer 3/4部分肱骨近端骨折术后功能的影响 认领 引用
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作者 郑金文 向明 +4 位作者 张立 李一平 代飞 张清 杨金松 《中华肩肘外科电子杂志》 2025年第4期232-237,共6页
目的评估50岁以上患者采用锁定钢板固定联合肱二头肌长头腱(long head of the biceps tendon,LHBT)固定术治疗Neer3/4部分肱骨近端骨折的临床效果,重点关注肩关节功能及肱二头肌腱相关症状改善。方法回顾性分析2022年1月至2024年3月接... 目的评估50岁以上患者采用锁定钢板固定联合肱二头肌长头腱(long head of the biceps tendon,LHBT)固定术治疗Neer3/4部分肱骨近端骨折的临床效果,重点关注肩关节功能及肱二头肌腱相关症状改善。方法回顾性分析2022年1月至2024年3月接受锁定钢板内固定手术的50岁以上Neer 3/4部分肱骨近端骨折患者,排除开放性骨折、合并神经损伤、多发骨折的病例,以及术后出现骨坏死、骨折吸收、肱骨头塌陷、内固定失效等并发症的病例。最终75例患者被纳入分析,其中LHBT固定术组31例(Neer 3部分21例、4部分10例),对照组44例(Neer 3部分31例、4部分13例)。术后采用Constant-Murley评分评估肩关节功能,Speed试验检测肱二头肌腱病变。结果固定术组的Constant-Murley评分显著优于对照组[(84.9±4.9)分vs(81.8±6.3)分,P=0.024],主要体现在固定术组的疼痛评分[(12.2±1.9)分vs(11.1±1.8)分,P=0.015]子项中表现更优,而日常生活能力、活动度和肌力改善不显著(P>0.05)。肱二头肌腱症状方面,固定术组Speed试验阳性率显著低于对照组(5/31 vs 20/44,P=0.008)。结论对于50岁以上Neer 3/4部分肱骨近端骨折患者,术中同期实施LHBT固定术,能缓解肩关节疼痛、减轻LHBT病变相关症状,并在一定程度上间接促进肩关节功能恢复。 展开更多
关键词 肱骨近端骨折 肱二头肌长头腱 固定术 肩关节功能
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