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Estimation of vegetation biophysical parameters by remote sensing using radial basis function neural network

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第6期8卷 883-895页

作者： YANG Xiao-hua HUANG Jing-feng wang jian-wen wang Xiu-zhen LIU Zhan-yu Institute of Agricultural Remote Sensing ＆ Information Application Zhejiang University Hangzhou 310029 China Key Laboratory of Agricultural Remote Sensing ＆ Information System Hangzhou 310029 China Communication Training Base of General Staff Headquarters Beijing 102400 China Zhejiang Meteorological Institute Hangzhou 310004 China

Hyperspectral reflectance (350~2500 nm) data were recorded at two different sites of rice in two experiment fields including two cultivars, and three levels of nitrogen (N) application. Twenty-five Vegetation Indices (VIs) were used to predict the rice agronomic parameters including Leaf Area Index (LAI, m2 green leaf/m2 soil) and Green Leaf Chlorophyll Density (GLCD, mg chlorophyll/m2 soil) by the traditional regression models and Radial Basis Function Neural Network (RBF). RBF emerged as a variant of Artificial Neural Networks (ANNs) in the late 1980’s. A large variety of training algorithms has been tested for training RBF networks. In this study, Original RBF (ORBF), Gradient Descent RBF (GDRBF), and Generalized Regression Neural Network (GRNN) were employed. Results showed that green waveband Normalized Difference Vegetation Index (NDVIgreen) and TCARI/OSAVI have the best prediction power for LAI by exponent model and ORBF respectively, and that TCARI/OSAVI has the best prediction power for GLCD by exponent model and GDRBF. The best performances of RBF are compared with the traditional models, showing that the relationship between VIs and agronomic variables are further improved when RBF is used. Compared with the best traditional models, ORBF using TCARI/OSAVI improves the prediction power for LAI by lowering the Root Mean Square Error (RMSE) for 0.1119, and GDRBF using TCARI/OSAVI improves the prediction power for GLCD by lowering the RMSE for 26.7853. It is concluded that RBF provides a useful exploratory and predictive tool when applied to the sensitive VIs.

关键词： Artificial neural network (ANN) Radial basis function (RBF) Remote sensing Rice Vegetation index (VI)

Comparison Between Radial Basis Function Neural Network and Regression Model for Estimation of Rice Biophysical Parameters Using Remote Sensing

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Pedosphere 2009年第2期19卷 176-188页

作者： YANG Xiao-Hua wang Fu-Min HUANG Jing-Feng wang jian-wen wang Ren-Chao SHEN Zhang-Quan wang Xiu-Zhen Institute of Agricultural Remote Sensing ＆ Information Application Zhejiang University Hangzhou 310029 China Meteorological and Hydrographic Department of General Staff Headquarters Beijing 100081 China Zhejiang Meteorological Institute Hangzhou 310004 China

The radial basis function （RBF） emerged as a variant of artificial neural network. Generalized regression neural network （GRNN） is one type of RBF, and its principal advantages are that it can quickly learn and rapidly converge to the optimal regression surface with large number of data sets. Hyperspectral reflectance （350 to 2500 nm） data were recorded at two different rice sites in two experiment fields with two cultivars, three nitrogen treatments and one plant density （45 plants m^-2）. Stepwise multivariable regression model （SMR） and RBF were used to compare their predictability for the leaf area index （LAI） and green leaf chlorophyll density （GLCD） of rice based on reflectance （R） and its three different transformations, the first derivative reflectance （D1）, the second derivative reflectance （D2） and the log-transformed reflectance （LOG）. GRNN based on D1 was the best model for the prediction of rice LAI and CLCD. The relationships between different transformations of reflectance and rice parameters could be further improved when RBF was employed. Owing to its strong capacity for nonlinear mapping and good robustness, GRNN could maximize the sensitivity to chlorophyll content using D1. It is concluded that RBF may provide a useful exploratory and predictive tool for the estimation of rice biophysical parameters.

关键词： biophysical parameters radial basis function regression model remote sensing rice

A General Introduction of HIV/AIDS Treatment with Traditional Chinese Medicine in China

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Virologica Sinica 2007年第6期22卷 471-475页

作者： jian wang wen ZOU Traditional Chinese Medicine Center for AIDS Prevention and Treatment China Academy of Chinese Medicine Sciences Beijing 100700 China

This paper gives a general introduction of HIV/AIDS treatment with Traditional Chinese Medicine (TCM) in China during the past 20 years. Although the role of TCM in treatment of HIV/AIDS is promising,there is still a ... 详细信息

关键词： HIV/AIDS Traditional Chinese Medicine (TCM) General introduction

An entirely new approach based on remote sensing data to calculate the nitrogen nutrition index of winter wheat

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Journal of Integrative Agriculture 2021年第9期20卷 2535-2551页

作者： ZHAO Yu wang jian-wen CHEN Li-ping FU Yuan-yuan ZHU Hong-chun FENG Hai-kuan XU Xin-gang LI Zhen-hai Key Laboratory of Quantitative Remote Sensing in Ministry of Agriculture and Rural Affairs/Beijing Research Center for Information Technology in Agriculture Beijing 100097P.R.China National Engineering Research Center for Information Technology in Agriculture Beijing 100097P.R.China College of Geomatics Shandong University of Science and TechnologyQingdao 266590P.R.China

The nitrogen nutrition index(NNI)is a reliable indicator for diagnosing crop nitrogen(N)***,there is currently no specific vegetation index for the NNI inversion across multiple growth *** overcome the limitations of the traditional direct NNI inversion method(NNI_(T1))of the vegetation index and traditional indirect NNI inversion method(NNI_(T2))by inverting intermediate variables including the aboveground dry biomass(AGB)and plant N concentration(PNC),this study proposed a new NNI remote sensing index(NNI_(RS)).A remote-sensing-based critical N dilution curve(Nc_(_RS))was set up directly from two vegetation indices and then used to calculate NNI_(RS).Field data including AGB,PNC,and canopy hyperspectral data were collected over four growing seasons(2012–2013(Exp.1),2013–2014(Exp.2),2014–2015(Exp.3),2015–2016(Exp.4))in Beijing,*** experimental datasets were cross-validated to each of the NNI models(NNI_(T1),NNI_(T2)and NNI_(RS)).The results showed that:(1)the NNI_(RS)models were represented by the standardized leaf area index determining index(sLAIDI)and the red-edge chlorophyll index(CI_(red edge))in the form of NNI_(RS)=CI_(red edge)/(a×sLAIDI~b),where"a"equals 2.06,2.10,2.08 and 2.02 and"b"equals 0.66,0.73,0.67 and 0.62 when the modeling set data came from Exp.1/2/4,Exp.1/2/3,Exp.1/3/4,and Exp.2/3/4,respectively;(2)the NNI_(RS)models achieved better performance than the other two NNI revised methods,and the ranges of R2 and RMSE were 0.50–0.82 and 0.12–0.14,respectively;(3)when the remaining data were used for verification,the NNI_(RS)models also showed good stability,with RMSE values of 0.09,0.18,0.13 and 0.10,***,it is concluded that the NNI_(RS)method is promising for the remote assessment of crop N status.

关键词： nitrogen nutrition index(NNI) critical nitrogen dilution curve standardized leaf area index determining index(s LAIDI) the red-edge chlorophyll index(CI_(red edge))

Pulmonary embolism presenting as recurrent transient loss of consciousness： syncope and seizure

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Chinese Medical Journal 2013年第1期126卷 193-194页

作者： wang jian-wen XU Ming-wei LUO Ben-yan Department of Neurology First Affiliated Hospital ZhejiangUniversity School of Medicine Hangzhou Zheiiang 310003China

Puhnonary embolism （PE） is a potentially lethal disease. Syncope or seizure as a presenting symptomof＇ PE is very difficult to diagnose. We report a patient with PI~ presenting recurrent transient loss of conscious... 详细信息

关键词： pulmonary embolism syncope seizure

Stratified pain management counseling and implementation improving patient satisfaction:a prospective,pilot study

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Chinese Medical Journal 2019年第23期132卷 2812-2819页

作者： Li-Hua Peng Su Min Ju-Ying Jin wen-jian wang Department of Anesthesiology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

Background:Post-operative pain is unpleasant for patients and may worsen surgical ***-operative multimodal analgesia has been used for many years;however,its efficacy still needs *** the present study,a thorough peri-operative pain counseling and stratified management program based on risk assessment was implemented,with the goal of improving postoperative analgesia and patient ***:This prospective,controlled,pilot study included 361 patients who underwent elective *** these 361 patients,187 received peri-operative pain risk assessment and stratified analgesia and counseling(stratified analgesia group),while 174 received conventional multimodal analgesia(conventional group).The two groups were compared regarding the post-operative pain intensity,rescue analgesia administration,post-operative quality of recovery as assessed via the quality of recovery 40 questionnaire,total dosage of peri-operative opioids,analgesic satisfaction,and analgesic ***:Compared with the conventional group,the stratified analgesia group reported decreased pain intensity during motion at 24 h post-operatively and required lower dosages of rescue analgesia(P=0.03).The total quality of recovery 40 questionnaire score and the scores for physical wellbeing and pain were significantly better in the stratified analgesia group than the conventional group(P=0.04);the stratified analgesia group also reported better scores for analgesic satisfaction(P=0.03)and received lower dosages of opioids(P=0.03).Analgesic costs were lower in the stratified analgesia group than the conventional group;the cost-effective ratio was 109 in the conventional group and 62 in the stratified analgesia ***:The analgesic efficacy was improved by the implementation of stratified analgesia based on surgical pain risk assessment and *** stratified analgesia protocol increased the patients5 analgesic satisfaction and improved the quality of recover

关键词： Acute surgical pain Risk assessment Stratified counseling Multimodal analgesia

NON-CONTACT MEASUREMENT SYSTEM OF FREEFORM SURFACE AND NURBS RECONSTRUCTION OF MEASUREMENT POINTS

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Chinese Journal of Mechanical Engineering 2002年第4期15卷 366-371页

作者： Li jian wang wen Chen Zichen Institute of Advanced Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China Institute of Advanced Manufacturing Engineering Zhejiang University Hangzhou 310027 China

Based on the development of the non-contact measurement system of free-formsurface, NURBS reconstruction of measurement points of freeform surface is effectively realized bymodifying the objective function and recursive procedure and calculating the optimum number ofcontrol points. The reconstruction precision is evaluated through Ja-cobi's transformation *** feasibility of the measurement system and effectiveness of the reconstruction algorithm aboveare proved by experiment.

关键词： freeform surface non-contact measurement NURBS precision evaluation

Anatomy of the lateral ligaments of the rectum: A controversial point of view

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World Journal of Gastroenterology 2010年第43期16卷 5411-5415页

作者： Guo-Jun wang, Chun-Fang Gao, Dong Wei, Cun wang, wen-jian Meng, Institute of Digestive Surgery and Department of General Surgery, 150 Hospital of PLA, Gaoxin District, Luoyang 471031, Henan Province, China Institute of Digestive Surgery and Department of General Surgery 150 Hospital of PLA Gaoxin District Luoyang 471031 Henan Province China. cchunfang@***

The existence and composition of the lateral ligaments of the rectum (LLR) are still the subjects of anatomical confusion and surgical misconception up to now. Since Miles proposed abdominoperineal excision as radical surgery for rectal cancer, the identification by "hooking them on the finger" has been accepted by many surgeons with no doubt; clamping, dividing and ligating are considered to be essential procedures in mobilization of the rectum in many surgical textbooks. But in cadaveric studies, many anatomists could not find LLR described by the textbooks, and more and more surgeons also failed to find LLR during the proctectomy according to the principle of total mesorectal excision. The anatomy of LLR has diverse descriptions in literatures. According to our clinical observations, the traditional anatomical structures of LLR do exist; LLR are constant dense connective bundles which are located in either lateral side of the lower part of the rectum, run between rectal visceral fascia and pelvic parietal fascia above the levator ani, and covered by superior fascia of pelvic diaphragm. They are pathways of blood vessels and nerve fibers toward the rectum and lymphatic vessels from the lower rectum toward the iliac lymph nodes.

关键词： The lateral ligaments of the rectum Anatomy Total mesorectal excision Abdominoperineal excision Fascia

Idebenone Maintains Survival of Mutant Myocilin Cells by Inhibiting Apoptosis

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Chinese Medical Journal 2016年第16期129卷 2001-2004页

作者： Yue Guan Juan Li Tao Zhan jian-wen wang jian-Bo Yu Lan Yang Department of Ophthalmology Affiliated Hongqi Hospital Mudanjiang Medical University Mudanjiang Heilongjiang 157011 China Department of Endocrinology Affiliated Hongqi Hospital Mudanjiang Medical University Mudanjiang Heilongjiang 157011 China Department of Pathology Affiliated Hongqi Hospital Mudanjiang Medical University Mudanjiang Heilongjiang 157011 China

INTRODUCTION Glaucoma is a chronic progressive neurodegenerative disease and exhibits heterogeneity, polygenic inheritance, and incomplete penetrance. Primary open-angle glaucoma （POAG） is the most common form of glaucoma. Although the underlying etiology of POAG is unknown, there is evidence that genetic mutations are closely associated with this disease, Among myocilin （MYOC） mutations, Pro370Leu （P370L） is responsible for one of the most severe glaucoma phenotypes, However, the function of MYOC protein is still not well understood.

关键词： Apoptosis CHOP Glaucoma ldebenone Myocilin