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TDS-1 GNSS reflectometry wind geophysical model function response to GPS block types 认领 引用 被引量：3
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作者 Fade Chen Xiaohong Zhang +3 位作者 Fei Guo Jiazhu Zheng Yang Nan Mohamed Freeshah 《Geo-Spatial Information Science》 SCIE EI CSCD 2022年第2期312-324,共13页
This paper presents the TDS-1 GNSS reflectometry wind Geophysical Model Function(GMF)response to GPS block types.The observables were extracted from Delay Doppler Maps(DDMs)after taking the receiver antenna gains effe... This paper presents the TDS-1 GNSS reflectometry wind Geophysical Model Function(GMF)response to GPS block types.The observables were extracted from Delay Doppler Maps(DDMs)after taking the receiver antenna gains effects and GNSS-R geometry effects into account.Since the DDM is affected by GPS EffectiveIsotropic Radiated Power(EIRP),we first investigate the sensitivity of observables to the GPS block.Additionally,the observables at high SNRs are more sensitive to wind speed,but the spatial coverage at high signal to noise ratios(SNRs)is lower,while DDMs at low SNRs have the opposite characteristics.To balance the accuracy and spatial coverage,the DDM datasets are divided into two parts:high SNR(>0 dB)and low SNR(>−10 dB and≤0 dB)to develop wind GMF.Then,the influences of GPS block on wind speed retrieval both at high and low SNR is analyzed.Results show that the block types have impacts on wind GMF and the use of a prior GPS block can contribute to a better wind speed retrieval both at high and low SNR.Compared with ASCAT,the Root Mean Square Error(RMSE)value of wind speed retrieval at high and low SNR are 2.19 m/s and 3.13 m/s,respectively,when all TDS data are processed without distinguishing GPS block types.However,if the TDS data are separately processed and used to develop wind GMF through different blocks,both the accuracy and correlation coefficient can be improved to some extent.Finally,the influence of significant height of the swell(Hs)on SNR observables is analyzed,and it is demonstrated that there is no obvious linear or nonlinear relationship between them. 展开更多
关键词 Global Navigation Satellite System-Reflectometry(GNSS-R) Delay-Doppler Map(DDM) wind speed Geophysical Model Function(GMF) TechDemoSat-1(TDS-1) GPS block
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The Roughness of Model Function to the Basis Functions 认领 引用 被引量：1
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作者 To Van Ban Nguyen Thi Quyen Phan Thu Ha 《Journal of Mathematics and System Science》 2013年第8期385-390,共6页
The roughness of the model function f（x） to the basis functions has been identified. When the model function is continuous segment, its roughness does not depend on the behavior of the first segment, but depends on ... The roughness of the model function f（x） to the basis functions has been identified. When the model function is continuous segment, its roughness does not depend on the behavior of the first segment, but depends on ＂h＂, the shift in the slope of two consecutive segments. If the distribution of design is uniform, f（x） is continuous segment function, and h is constant, then the maximum roughness is h2/192 obtained at the midpoint of the observations. Suppose that we have a sequence of designs {Pn（x）} then its corresponding distribution {Fn （x）} converges weakly to some distribution F（x）. Let D（f） be a set of discontinuous points off（x）, it is possible to take the limit of the roughness if D（f） has zero （dF）-measure. The behavior of maximum roughness of the discontinuous segment function has been studied by using grid points. 展开更多
关键词 The roughness segment function model function design converge.
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Functional generalized estimating equation model to detect glaucomatous visual field progression 认领 引用
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作者 Sanghun Jeong Hwayeong Kim +4 位作者 Sangwoo Moon EunAh Kim Hojin Yang Jiwoong Lee Kouros Nouri-Mahdavi 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第2期302-311,共10页
AIM:To build a functional generalized estimating equation(GEE)model to detect glaucomatous visual field progression and compare the performance of the proposed method with that of commonly employed algorithms.METHODS:... AIM:To build a functional generalized estimating equation(GEE)model to detect glaucomatous visual field progression and compare the performance of the proposed method with that of commonly employed algorithms.METHODS:Totally 716 eyes of 716 patients with primary open angle glaucoma(POAG)with at least 5 reliable 24-2 test results and 2y of follow-up were selected.The functional GEE model was used to detect perimetric progression in the training dataset(501 eyes).In the testing dataset(215 eyes),progression was evaluated the functional GEE model,mean deviation(MD)and visual field index(VFI)rates of change,Advanced Glaucoma Intervention Study(AGIS)and Collaborative Initial Glaucoma Treatment Study(CIGTS)scores,and pointwise linear regression(PLR).RESULTS:The proposed method showed the highest proportion of eyes detected as progression(54.4%),followed by the VFI rate(34.4%),PLR(23.3%),and MD rate(21.4%).The CIGTS and AGIS scores had a lower proportion of eyes detected as progression(7.9%and 5.1%,respectively).The time to detection of progression was significantly shorter for the proposed method than that of other algorithms(adjusted P≤0.019).The VFI rate displayed moderate pairwise agreement with the proposed method(k=0.47).CONCLUSION:The functional GEE model shows the highest proportion of eyes detected as perimetric progression and the shortest time to detect perimetric progression in patients with POAG. 展开更多
关键词 functional generalized estimating equation model primary open angle glaucoma perimetric progression
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Artificial hearing systems based on functional cochlea models 认领 引用 被引量：2
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作者 Jinke Chang Sita Tarini Clark +3 位作者 Iwan Roberts Filip Hrncirik Zhipeng Zhang Manohar Bance 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第1期73-94,共22页
The cochlea is one of the most complex organs in the human body,exhibiting a complex interplay of characteristics in acoustic,mechanical,electrical,and biological functions.Functional cochlea models are an essential p... The cochlea is one of the most complex organs in the human body,exhibiting a complex interplay of characteristics in acoustic,mechanical,electrical,and biological functions.Functional cochlea models are an essential platform for studying hearing mechanics and are crucial for developing next-generation auditory prostheses and artificial hearing systems for sensorineural hearing restoration.Recent advances in additive manufacturing,organ-on-a-chip models,drug delivery platforms,and artificial intelligence have provided valuable insights into how to manufacture artificial cochlea models that more accurately replicate the complex anatomy and physiology of the inner ear.This paper reviews recent advancements in the applications of advanced manufacturing techniques in reproducing the physical,biological,and intelligent functions of the cochlea.It also outlines the current challenges to developing mechanically,electrically,and anatomically accurate functional models of the inner ear.Finally,this review identifies the major requirements and outlook for impactful research in this field going forward.Through interdisciplinary collaboration and innovation,these functional cochlea models are poised to drive significant advancements in hearing treatments,and ultimately enhance the quality of life for individuals with hearing loss. 展开更多
关键词 functional cochlea model auditory system hearing loss advanced manufacturing artificial hearing
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Functional evidential reasoning model(FERM)-A new systematic approach for exploring hazardous chemical operational accidents under uncertainty 认领 引用 被引量：1
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作者 Qianlin Wang Jiaqi Han +6 位作者 Lei Cheng Feng Wang Yiming Chen Zhan Dou Bing Zhang Feng Chen Guoan Yang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第5期255-269,共15页
This paper proposed a new systematic approach-functional evidential reasoning model(FERM) for exploring hazardous chemical operational accidents under uncertainty. First, FERM was introduced to identify various causal... This paper proposed a new systematic approach-functional evidential reasoning model(FERM) for exploring hazardous chemical operational accidents under uncertainty. First, FERM was introduced to identify various causal factors and their performance changes in hazardous chemical operational accidents, along with determining the functional failure link relationships. Subsequently, FERM was employed to elucidate both qualitative and quantitative operational accident information within a unified framework, which could be regarded as the input of information fusion to obtain the fuzzy belief distribution of each cause factor. Finally, the derived risk values of the causal factors were ranked while constructing multi-level accident causation chains to unveil the weak links in system functionality and the primary roots of operational accidents. Using the specific case of the “1·15” major explosion and fire accident at Liaoning Panjin Haoye Chemical Co., Ltd., seven causal factors and their corresponding performance changes were identified. Additionally, five accident causation chains were uncovered based on the fuzzy joint distribution of the functional assessment level(FAL) and reliability distribution(RD),revealing an overall increase in risk along the accident evolution path. The research findings demonstrated that FERM enabled the effective characterization, rational quantification and accurate analysis of the inherent uncertainties in hazardous chemical operational accident risks from a systemic perspective. 展开更多
关键词 Functional evidential reasoning model (FERM) Accident causation analysis Operational accidents Hazardous chemical Uncertainty
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基于大语言模型Function-calling架构的中医舌象辅助问诊系统 认领 引用
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作者 施浩然 王月明 +3 位作者 石磊 王瑾 谷宇 李琦 《科学技术与工程》 EI 北大核心 2026年第13期5583-5593,共11页
针对大语言模型缺乏视觉能力及现有多模态大模型在中医舌象分析中准确率不足的问题,构建了一个中医舌象辅助问诊系统,实现舌象的自动分类与中医辅助诊疗方案的生成。在利用UNet进行舌象分割的基础上,使用TransNeXt主干网络构建舌象多标... 针对大语言模型缺乏视觉能力及现有多模态大模型在中医舌象分析中准确率不足的问题,构建了一个中医舌象辅助问诊系统,实现舌象的自动分类与中医辅助诊疗方案的生成。在利用UNet进行舌象分割的基础上,使用TransNeXt主干网络构建舌象多标签分类系统,实现舌体分割与舌象多标签分类。进一步,结合舌象多标签分类系统与大语言模型,并基于微调后的Function-calling架构,实现了中医舌象辅助问诊系统。在舌象多标签分类系统的有效性验证实验中,UNet模型在舌象分割的平均精确度、平均召回率和平均交并比指标上表现较好,分别达到97.58%,98.61%和96.25%;基于TransNeXt主干网络开发的舌象多标签分类模型在舌象识别的子集准确率、精确度、召回率、F1方面表现更佳,分别达到75.69%、91.18%、91.41%、91.28%。在中医辅助诊疗方案的生成实验中,甄选出的最佳大语言模型相较于多模态大模型在Bleu-4、Rouge-1、Rouge-2、Rouge-L同样表现更佳,分别达到79.03%、82.46%、76.00%、86.46%。结合舌象多标签分类系统以及大语言模型构建的中医舌象辅助问诊系统能够辅助中医进行舌诊,为中医辅助诊断方案的生成提供技术支持。 展开更多
关键词 大语言模型 Function-calling架构 舌象识别 中医知识问答
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Hybrid graded element model for transient heat conduction in functionally graded materials 认领 引用 被引量：4
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作者 Lei-Lei Cao Qing-Hua Qin Ning Zhao 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第1期128-139,共12页
This paper presents a hybrid graded element model for the transient heat conduction problem in functionally graded materials （FGMs）. First, a Laplace transform approach is used to handle the time variable. Then, a f... This paper presents a hybrid graded element model for the transient heat conduction problem in functionally graded materials （FGMs）. First, a Laplace transform approach is used to handle the time variable. Then, a fundamental solution in Laplace space for FGMs is constructed. Next, a hybrid graded element is formulated based on the obtained fundamental solution and a frame field. As a result, the graded properties of FGMs are naturally reflected by using the fundamental solution to interpolate the intra-element field. Further, Stefest＇s algorithm is employed to convert the results in Laplace space back into the time-space domain. Finally, the performance of the proposed method is assessed by several benchmark examples. The results demonstrate well the efficiency and accuracy of the proposed method. 展开更多
关键词 Graded element model Functionally graded materials Hybrid FEM Transient heat conduction
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Generalized functional model of maximum and minimum detectable deformation gradient for PALSAR interferometry 认领 引用 被引量：4
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作者 王琪洁 李志伟 +4 位作者 杜亚男 谢荣安 张杏清 蒋弥 朱建军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第3期824-832,共9页
Empirical functional models for the maximum and minimum detectable deformation gradient of PALSAR interferometry were established based on coherence and discrete look numbers. Then, a least square regression method wa... Empirical functional models for the maximum and minimum detectable deformation gradient of PALSAR interferometry were established based on coherence and discrete look numbers. Then, a least square regression method was used to fit the model coefficients and thus obtain the generalized functional models for both coherence and look numbers. The experimental results with ALOS PALSAR data of Wenchuan earthquake of China show that the new model works well for judging whether the deformation gradient can be detected by the D-InSAR technology or not. The results can help researchers to choose PALSAR data and to configure processing parameters, and also benefit the interpretation of the measured surface deformation. 展开更多
关键词 PALSAR D-InSAR deformation gradient coherence multilook number functional model
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Molecular properties and potential energy function model of BH under external electric field 认领 引用 被引量：12
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作者 伍冬兰 谭彬 +2 位作者 万慧军 张新琴 谢安东 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第12期194-198,共5页
Using the density functional B3P86/cc-PV5Z method, the geometric structure of BH molecule under different external electric fields is optimized, and the bond lengths, dipole moments, vibration frequencies, and other p... Using the density functional B3P86/cc-PV5Z method, the geometric structure of BH molecule under different external electric fields is optimized, and the bond lengths, dipole moments, vibration frequencies, and other physical properties parameters are obtained. On the basis of setting appropriate parameters, scanning single point energies are obtained by the same method and the potential energy curves under different external fields are also obtained. These results show that the physical property parameters and potential energy curves may change with external electric field, especially in the case of reverse direction electric field. The potential energy function without external electric field is fitted by Morse potential, and the fitting parameters are obtained which are in good agreement with experimental values. In order to obtain the critical dissociation electric parameter, the dipole approximation is adopted to construct a potential model fitting the corresponding potential energy curve of the external electric field. It is found that the fitted critical dissociation electric parameter is consistent with numerical calculation, so that the constructed model is reliable and accurate. These results will provide important theoretical and experimental reference for further studying the molecular spectrum, dynamics, and molecular cooling with Stark effect. 展开更多
关键词 BH molecule potential function model external electric field
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Time function of surface subsidence based on Harris model in mined-out area 认领 引用 被引量：10
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作者 Liu Xinrong Wang Junbao +2 位作者 Guo Jianqiang Yuan Hong Li Peng 《International Journal of Mining Science and Technology》 EI CAS 2013年第2期251-254,共4页
The surface subsidence is a common environmental hazard in mined-out area. Based on careful analysis of the regularity of surface subsidence in mined-out area, we proposed a new time function based on Harris curve mod... The surface subsidence is a common environmental hazard in mined-out area. Based on careful analysis of the regularity of surface subsidence in mined-out area, we proposed a new time function based on Harris curve model in consideration of the shortage of current surface subsidence time functions. By analyzing the characteristics of the new time function, we found that it could meet the dynamic process, the velocity change process and the acceleration change process during surface subsidence. Then its rationality had been verified through project cases. The results show that the proposed time function model can give a good reflection of the regularity of surface subsidence in mined-out area and can accurately predict surface subsidence. And the prediction data of the model are a little greater than measured data on condition of proper measured data quantity, which is safety in the engineering. This model provides a new method for the analysis of surface subsidence in mined-out area and reference for future prediction, and it is valuable to engineering application. 展开更多
关键词 Mined-out area Surface subsidence Time function Harris model Prediction
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A power function model for simulating creep mechanical properties of salt rock 认领 引用 被引量：2
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作者 LI Huan Ngaha Tiedeu WILLIAM +2 位作者 Jaak DAEMEN ZHOU Jun MA Chang-kun 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第2期578-591,共14页
In this paper,a new micro-creep model of salt rock is proposed based on a linear parallel bonded model(LPBM)using the two-dimensional particle flow code(PFC2D).The power function weakening form is assumed to describe ... In this paper,a new micro-creep model of salt rock is proposed based on a linear parallel bonded model(LPBM)using the two-dimensional particle flow code(PFC2D).The power function weakening form is assumed to describe the variation of the parallel bonded diameter(PBD)over time.By comparing with the parallel-bonded stress corrosion(PSC)model,a smaller stress fluctuation and smoother creep strain−time curves can be obtained by this power function model at the same stress level.The validity and adaptability of the model to simulate creep deformation of salt rock are verified through comparing the laboratory creep test curves and the Burgers model fitting result.The numerical results reveal that this model can be capable of capturing the creep deformation and damage behavior from the laboratory observations. 展开更多
关键词 salt rock creep damage particle flow code power function model
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Generic functional modelling of multi-pulse auto-transformer rectifier units for more-electric aircraft applications 认领 引用 被引量：1
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作者 Tao YANG Serhiy BOZHKO +2 位作者 Patrick WHEELER Shaoping WANG Shuai WU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2018年第5期883-891,共9页
The Auto-Transformer Rectifier Unit（ATRU） is one preferred solution for high-power AC/DC power conversion in aircraft. This is mainly due to its simple structure, high reliability and reduced k VA ratings. Indeed, t... The Auto-Transformer Rectifier Unit（ATRU） is one preferred solution for high-power AC/DC power conversion in aircraft. This is mainly due to its simple structure, high reliability and reduced k VA ratings. Indeed, the ATRU has become a preferred AC/DC solution to supply power to the electric environment control system on-board future aircraft. In this paper, a general modelling method for ATRUs is introduced. The developed model is based on the fact that the DC voltage and current are strongly related to the voltage and current vectors at the AC terminals of ATRUs. In this paper, we carry on our research in modelling symmetric 18-pulse ATRUs and develop a generic modelling technique. The developed generic model can study not only symmetric but also asymmetric ATRUs. An 18-pulse asymmetric ATRU is used to demonstrate the accuracy and efficiency of the developed model by comparing with corresponding detailed switching SABER models provided by our industrial partner. The functional models also allow accelerated and accurate simulations and thus enable whole-scale more-electric aircraft electrical power system studies in the future. 展开更多
关键词 Asymmetric transformer Functional modelling More-Electric Aircraft Multi-pulse rectifier Transformer rectifier unit
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Three-Component Model for Bidirectional Reflection Distribution Function of Thermal Coating Surfaces 认领 引用 被引量：4
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作者 刘宏 朱京平 +2 位作者 王凯 王秀红 徐蓉 《Chinese Physics Letters》 SCIE EI CAS CSCD 2016年第6期33-36,共4页
We present a bidirectional reflection distribution function （BRDF） model for thermal coating surfaces based on a three-component reflection assumption, in which the specular reflection is given according to the micr... We present a bidirectional reflection distribution function （BRDF） model for thermal coating surfaces based on a three-component reflection assumption, in which the specular reflection is given according to the microfacet theory and Snell＇s law, the multiple reflection is considered Nth cosine distributed, and the volume scattering is uniformly distributed in reflection angles according to the experimental results. This model describes the reflection characteristics of thermal coating surfaces more completely and reasonably. Simulation and measurement results of two thermal coating samples SR107 and S781 are given to validate that this three-component model significantly improves the modeling accuracy for thermal coating surfaces compared with the existing BRDF models. 展开更多
关键词 for in BRDF Three-Component Model for Bidirectional Reflection Distribution Function of Thermal Coating Surfaces of
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Research on Function Based Method for Bio-Inspiration Knowledge Modeling and Transformation 认领 引用 被引量：2
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作者 谷朝臣 胡洁 彭颖红 《Journal of Shanghai Jiaotong university(Science)》 EI 2014年第2期190-198,共9页
Biological inspirations are good design mimicry resources. This paper proposes a function based approach for modeling and transformation of bio-inspiration design knowledge. A general functional modeling method for bi... Biological inspirations are good design mimicry resources. This paper proposes a function based approach for modeling and transformation of bio-inspiration design knowledge. A general functional modeling method for biological domain and engineering domain design knowledge is introduced. Functional similarity based bio-inspiration transformation between biological domain and engineering domain is proposed. The biological function topology transfer and analog solution recomposition are also discussed in this paper. 展开更多
关键词 bio-inspired design functional modeling ontology functional reasoning knowledge transfer
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Physics-constrained deep-inverse point spread function model:toward non-line-of-sight imaging reconstruction 认领 引用 被引量：3
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作者 Su Wu Chan Huang +4 位作者 Jing Lin Tao Wang Shanshan Zheng Haisheng Feng Lei Yu 《Advanced Photonics Nexus》 2024年第2期90-99,共10页
Non-line-of-sight(NLOS)imaging has emerged as a prominent technique for reconstructing obscured objects from images that undergo multiple diffuse reflections.This imaging method has garnered significant attention in d... Non-line-of-sight(NLOS)imaging has emerged as a prominent technique for reconstructing obscured objects from images that undergo multiple diffuse reflections.This imaging method has garnered significant attention in diverse domains,including remote sensing,rescue operations,and intelligent driving,due to its wide-ranging potential applications.Nevertheless,accurately modeling the incident light direction,which carries energy and is captured by the detector amidst random diffuse reflection directions,poses a considerable challenge.This challenge hinders the acquisition of precise forward and inverse physical models for NLOS imaging,which are crucial for achieving high-quality reconstructions.In this study,we propose a point spread function(PSF)model for the NLOS imaging system utilizing ray tracing with random angles.Furthermore,we introduce a reconstruction method,termed the physics-constrained inverse network(PCIN),which establishes an accurate PSF model and inverse physical model by leveraging the interplay between PSF constraints and the optimization of a convolutional neural network.The PCIN approach initializes the parameters randomly,guided by the constraints of the forward PSF model,thereby obviating the need for extensive training data sets,as required by traditional deep-learning methods.Through alternating iteration and gradient descent algorithms,we iteratively optimize the diffuse reflection angles in the PSF model and the neural network parameters.The results demonstrate that PCIN achieves efficient data utilization by not necessitating a large number of actual ground data groups.Moreover,the experimental findings confirm that the proposed method effectively restores the hidden object features with high accuracy. 展开更多
关键词 non-line-of-sight imaging point spread function model deep learning
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Rainfall-runoff risk characteristics of urban function zones in Beijing using the SCS-CN model 认领 引用 被引量：5
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作者 姚磊 卫伟 +2 位作者 于洋 肖峻 陈利顶 《Journal of Geographical Sciences》 SCIE CSCD 2018年第5期656-668,共13页
Urbanization significantly increases the risk of urban flooding. Therefore, quantitative study of urban rainfall-runoff processes can provide a scientific basis for urban planning and management. In this paper, the bu... Urbanization significantly increases the risk of urban flooding. Therefore, quantitative study of urban rainfall-runoff processes can provide a scientific basis for urban planning and management. In this paper, the built-up region within the Fifth Ring Road of Beijing was selected as the study area. The details of land cover and urban function zones(UFZs) were identified using GIS and RS methods. On this basis, the SCS-CN model was adopted to analyze the rainfall-runoff risk characteristics of the study area. The results showed that:(1) UFZs within different levels of runoff risk varied under different rainfall conditions. The area ratio of the UFZs with high runoff risk increased from 18.90%(for rainfall return period of 1 a) to 54.74%(for period of 100 a). Specifically, urban commercial areas tended to have the highest runoff risk, while urban greening spaces had the lowest.(2) The spatial characteristics of the runoff risks showed an obvious circular distribution. Spatial cluster areas with high runoff risk were mainly concentrated in the center of the study area, while those with low runoff risk were mainly distributed between the fourth and fifth ring roads. The results indicated that the spatial clustering characteristic of urban runoff risk and runoff heterogeneity among different UFZs should be fully considered during urban rainwater management. 展开更多
关键词 SCS-CN model urban function zone spatial cluster runoff risk
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Coupling Modeling for Functional Surface of Electronic Equipment 认领 引用 被引量：1
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作者 Baoyan DUAN Congsi WANG Wei WANG 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第3期497-499,共3页
High performance electromechanical equipment is widely used in various fields, such as national defense, industry and so on [ 1]. In addition, the technical level of high performance electromechanical equipment is the... High performance electromechanical equipment is widely used in various fields, such as national defense, industry and so on [ 1]. In addition, the technical level of high performance electromechanical equipment is the embodiment of the national level of science and technology. 展开更多
关键词 TT Coupling Modeling for Functional Surface of Electronic Equipment
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Development of Mathematical Model on Preparation of Functionally Graded Material by Co-sedimentation 认领 引用 被引量：6
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作者 Zhongmin YANG, Lianmeng ZHANG and Qiang SHEN Institute of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第2期275-277,共3页
From the process of sedimentation the mathematical relationships among deposition Volume and powder properties as well as sedimentation parameters were deduced. Based on the formula a mathematical model was set up and... From the process of sedimentation the mathematical relationships among deposition Volume and powder properties as well as sedimentation parameters were deduced. Based on the formula a mathematical model was set up and simulated through the computer. At last the validity of mathematical model was supported by the representative experiment on Ti-Mo system FGM prepared by co-sedimentation. 展开更多
关键词 Co Mo Development of Mathematical Model on Preparation of Functionally Graded Material by Co-sedimentation
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Rough function model and rough membership function 认领 引用 被引量：1
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作者 Wang Yun Guan Yanyong Huang Zhiqin 《Journal of Systems Engineering and Electronics》 SCIE EI 2008年第3期522-528,共7页
Two pairs of approximation operators, which are the scale lower and upper approximations as well as the real line lower and upper approximations, are defined. Their properties and antithesis characteristics are analyz... Two pairs of approximation operators, which are the scale lower and upper approximations as well as the real line lower and upper approximations, are defined. Their properties and antithesis characteristics are analyzed. The rough function model is generalized based on rough set theory, and the scheme of rough function theory is made more distinct and complete. Therefore, the transformation of the real function analysis from real line to scale is achieved. A series of basic concepts in rough function model including rough numbers, rough intervals, and rough membership functions are defined in the new scheme of the rough function model. Operating properties of rough intervals similar to rough sets are obtained. The relationship of rough inclusion and rough equality of rough intervals is defined by two kinds of tools, known as the lower （upper） approximation operator in real numbers domain and rough membership functions. Their relative properties are analyzed and proved strictly, which provides necessary theoretical foundation and technical support for the further discussion of properties and practical application of the rough function model. 展开更多
关键词 rough set theory rough function model indiscernibility relation rough membership function roughnumber rough interval.
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Functional data analysis-based yield modeling in year-round crop cultivation 认领 引用 被引量：2
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作者 Hidetoshi Matsui Keiichi Mochida 《Horticulture Research》 SCIE CSCD 2024年第7期200-206,共7页
Crop yield prediction is essential for effective agricultural management.We introduce a methodology for modeling the relationship between environmental parameters and crop yield in longitudinal crop cultivation,exempl... Crop yield prediction is essential for effective agricultural management.We introduce a methodology for modeling the relationship between environmental parameters and crop yield in longitudinal crop cultivation,exemplified by strawberry and tomato production based on year-round cultivation.Employing functional data analysis(FDA),we developed a model to assess the impact of these factors on crop yield,particularly in the face of environmental fluctuation.Specifically,we demonstrated that a varying-coefficient functional regression model(VCFRM)is utilized to analyze time-series data,enabling to visualize seasonal shifts and the dynamic interplay between environmental conditions such as solar radiation and temperature and crop yield.The interpretability of our FDA-based model yields insights for optimizing growth parameters,thereby augmenting resource efficiency and sustainability.Our results demonstrate the feasibility of VCFRM-based yield modeling,offering strategies for stable,efficient crop production,pivotal in addressing the challenges of climate adaptability in plant factory-based horticulture. 展开更多
关键词 assess impact factors modeling relationship environmental parameters effective agricultural managementwe varying coefficient functional regression model environmental parameters functional data analysis crop yield prediction functional data analysis fda we
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