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Regression model to estimate flood impact on corn yield using MODIS NDVI and USDA cropland data layer

Journal of Integrative Agriculture 2017年第2期16卷 398-407页

作者： Ran jay Shrestha Liping Di Eugene G. Yu Lingjun kang SHAO Yuan-zhen BAI Yu-qi Center for Spatial Information Science and Systems (CSISS) George Mason University VA 22030 USA Department of Geography and Geoinformation Science George Mason University VA 22030 USA State key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 P. R. China key Laboratory for Earth System Modelling Ministry of Education/Department of Earth System Science (DESS) Tsinghua University Beijing 100084 P.R.China

Flood events and their impact on crops are extremely significant scientific research issues; however, flood monitoring is an exceedingly complicated process. Flood damages on crops are directly related to yield change, which requires accurate assessment to quantify the damages. Various remote sensing products and indices have been used in the past for this purpose. This paper utilizes the moderate resolution imaging spectroradiometer （MODIS） weekly normalized difference vegetation index （NDVI） product to detect and further quantify flood damages on corn within the major corn producing states in the Midwest region of the US. County-level analyses were performed by taking weighted average of all pure corn pixels （〉90%） masked by the United States Department of Agriculture （USDA） Cropland Data Layer （CDL）. The NDVI-based time-series difference between flood years and normal year （median of years 2000-2014） was used to detect flood occur- rences. To further measure the impact of the flood on corn yield, regression analysis between change in NDVI and change in corn yield as independent and dependent variables respectively was performed for 30 different flooding events within growing seasons of the corn. With the R2 value of 0.85, the model indicates statistically significant linear relation between the NDVI and corn yield. Testing the predictability of the model with 10 new cases, the average relative error of the model was only 4.47%. Furthermore, small error （4.8%） of leave-one-out cross validation （LOOCV） along with smaller statistical error indicators （root mean square error （RMSE）, mean absolute error （MAE）, and mean bias error （MBE））, further validated the accuracy of the model. Utilizing the linear regression approach, change in NDVI during the growing season of corn appeared to be a good indicator to quantify the yield loss due to flood. Additionally, with the 250 m MODIS-based NDVI, these yield losses can be estimated up to field level.

关键词： NDVI MODIS agriculture corn yield remote sensing regression

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ACL reconstruction with BPTB autograft and irradiated fresh frozen allograft

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第4期10卷 306-316页

作者： kang SUN Shao-qi TIAN Ji-hua ZHANG Chang-suo XIA Cai-long ZHANG Teng-bo YU Department of Orthopaedics Affiliated Hospital of Medical College Qingdao University Qingdao 266003 China Healthy Physical Examination Center Affiliated Hospital of Medical College Qingdao University Qingdao 266003 China

Objective： To analyze the clinical outcomes of arthroscopic anterior cruciate ligament （ACL） reconstruction with irradiated bone-patellar tendon-bone （BPTB） allograft compared with non-irradiated allograft and autograft. Methods： All BPTB allografts were obtained from a single tissue bank and the irradiated allografts were sterilized with 2.5 mrad of irradiation prior to distribution. A total of 68 patients undergoing arthroscopic ACL reconstruction were prospectively randomized consecutively into one of the two groups （autograft and irradiated allograft groups）. The same surgical technique was used in all operations done by the same senior surgeon. Before surgery and at the average of 31 months of follow-up （ranging from 24 to 47 months）, patients were evaluated by the same observer according to objective and subjective clinical evaluations. Results： Of these patients, 65 （autograft 33, irradiated allograft 32） were available for full evaluation. When the irradiated allografl group was compared to the autograft group at the 31 -month follow-up by the Lachman test, the anterior drawer test （ADT）, the pivot shift test, and KT-2000 arthrometer test, statistically significant differences were found. Most importantly, 87.8% of patients in the autograft group and just only 31.3% in the irradiated allograft group had a side-to-side difference of less than 3 mm according to KT-2000. The failure rate of the ACL reconstruction with irradiated allograft （34.4%） was higher than that with autograft （6.1%）. The anterior and rotational stabilities decreased significantly in the irradiated allograft group. According to the overall International Knee Documentation Committee （1KDC）, functional and subjective evaluations, and activity level testing, no statistically significant differences were found between the two groups. Besides, patients in the irradiated allograft group had a shorter operation time and a longer duration of postoperative fever. When the patients had a fever, the

关键词： Anterior cruciate ligament (ACE) reconstruction Patellar tendon Autograft Allograft Irradiation Prospectiverandomized study

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机械制图实践教学环节整合的研究

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装备制造技术 2017年第9期 220-221,226页

作者：康宝来南阳理工学院机械与汽车工程学院河南南阳473004

针对机械制图实践教学环节存在的问题,将制图测绘实训与三维CAD软件实训整合为机械测绘与先进成图技术,制定了课程的内容体系和考核方法,整合必要可行,符合现代设计理念。

关键词：机械测绘与先进成图技术内容体系考核方法

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Shuffled complex evolution coupled with stochastic ranking for reservoir scheduling problems

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Water Science and Engineering 2019年第4期12卷 307-318页

作者： Jing-qiao Mao Ming-ming Tian Teng-fei Hu kang Ji Ling-quan Dai Hui-chao Dai College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China Ningbo Hongtai Water Conservancy Information Technology Co. Ltd.Ningbo 315040China College of Hydraulic and Environmental Engineering Three Gorges UniversityYichang 443002China

This paper introduces an optimization method(SCE-SR)that combines shuffled complex evolution(SCE)and stochastic ranking(SR)to solve constrained reservoir scheduling problems,ranking individuals with both objectives and constrains considered.A specialized strategy is used in the evolution process to ensure that the optimal results are feasible *** method is suitable for handling multiple conflicting constraints,and is easy to implement,requiring little parameter *** search properties of the method are ensured through the combination of deterministic and probabilistic *** proposed SCE-SR was tested against hydropower scheduling problems of a single reservoir and a multi-reservoir system,and its performance is compared with that of two classical methods(the dynamic programming and genetic algorithm).The results show that the SCE-SR method is an effective and efficient method for optimizing hydropower generation and locating feasible regions quickly,with sufficient global convergence properties and *** operation schedules obtained satisfy the basic scheduling requirements of reservoirs.

关键词： Reservoir scheduling Optimization method Constraint handling Shuffled complex evolution Stochastic ranking

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Carbon armour with embedded carbon dots for building better supercapacitor electrodes

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Nano Research 2023年第5期16卷 6815-6824页

作者： Yuanyuan Cheng Yixian Liu Chen Chu Yunliang Liu Yaxi Li Ruqiang Wu Jianchun Wu Chunqiang Zhuang Zhenhui kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Institute of Nuclear Science and Technology Sichuan UniversityChengdu 610064China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

The microstructure design of electrode material is a crucial point to optimize the supercapacitor’s electrochemical *** this work,a Bi-based nanocomposite with a three-layer structure(Bi–Bi_(2)O_(3)@carbon armour(CA)/carbon dots(CDs))is synthesized and *** material inherits high capacitance and high activity from bismuth-based materials,the coated CA protects the structure from complete oxidization and improves surface ***,CDs in CA can enhance the ion conduction efficiency between the catalyst,carbon membrane,*** a consequence,the specific capacitance of the electrode reaches 973 F·g^(−1)under 1 A·g^(−1),the energy density achieves 32.5 Wh·kg^(−1)with a power density of 266.9 W·kg^(−1),with impressive electrochemical stability that Coulomb efficiency of the electrode remains about 100%after 5000 ***,in-situ Fourier transformation infrared(FT-IR)analyzes the structure evolvement of the material during synthesis and finds that the annealing process of the material removes a great number of oxygen-containing groups of CA and CDs,generating oxygen vacancies,defects,thus active sites,which enhance the capacitance of the material.

关键词： supercapacitor carbon armour Bi–Bi_(2)O_(3)interface carbon dots

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In Situ Deposition of Drug and Gene Nanoparticles on a Patterned Supramolecular Hydrogel to Construct a Directionally Osteochondral Plug

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Nano-Micro Letters 2024年第1期16卷 341-359页

作者： Jiawei kang Yaping Li Yating Qin Zhongming Huang Yifan Wu Long Sun Cong Wang Wei Wang Gang Feng Yiying Qi Department of Orthopaedic Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhou City 310009Zhejiang ProvincePeople’s Republic of China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215ZhejiangPeople’s Republic of China The Affiliated Nanhua Hospital Orthopedic Research CentreHengyang Medical SchoolUniversity of South ChinaHengyang 421001HunanPeople’s Republic of China Department of Radiology Jining No.1 People’s HospitalJining Medical UniversityJining 272000ShandongPeople’s Republic of China

The integrated repair of bone and cartilage boasts advantages for osteochondral restoration such as a long-term repair effect and less deterioration compared to repairing cartilage *** multifactorial,spatially oriented scaffolds to stimulate osteochondral regeneration,has immense ***,targeted drugs,namely kartogenin@polydopamine(KGN@PDA)nanoparticles for cartilage repair and miRNA@calcium phosphate(miRNA@CaP)NPs for bone regeneration,were in situ deposited on a patterned supramolecular-assembled 2-ureido-4[lH]-pyrimidinone(UPy)modified gelation hydrogel film,facilitated by the dynamic and responsive coordination and complexation of metal ions and their *** hydrogel film can be rolled into a cylindrical plug,mimicking the Haversian canal structure of natural *** resultant hydrogel demonstrates stable mechanical properties,a self-healing ability,a high capability for reactive oxygen species capture,and controlled release of KGN and *** vitro,KGN@PDA and miRNA@CaP promote chondrogenic and osteogenic differentiation of mesenchymal stem cells via the JNK/RUNX1 and GSK-3β/β-catenin pathways,*** vivo,the osteochondral plug exhibits optimal subchondral bone and cartilage regeneration,evidenced by a significant increase in glycosaminoglycan and collagen accumulation in specific zones,along with the successful integration of neocartilage with subchondral *** biomaterial delivery approach represents a significant toward improved osteochondral repair.

关键词： Osteochondral regeneration Oriented hydrogel Kartogenin miRNA-26a

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Flat Currents of Green-Schwarz Superstring in AdS2 × S^2 Background

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Communications in Theoretical Physics 2006年第4期45卷 663-668页

作者： WANG Xiao-Hui WANG Zhan-Yun CAI Xiao-Lin SONG Pei HOU Bo-Yu SHI kang-Jie Institute of Modern Physics Northwest University Xi＇an 710069 China

From the κ symmetric action of IIB string in AdS2 × S^2 background given by Zhou, we derive the equations of motion. By using the twisted dual transformation which was introduced by Hou, we construct the flat curren... 详细信息

关键词： Green-Schwarz superstring integrability AdS2 × S^2

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A proposal:a comprehensive platform to characterize tumors in Chinese and improve success in cancer drug discovery and development

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Chinese Journal of Cancer 2011年第6期30卷 363-367页

作者： Pearl S. Huang Peter T. Ho kang Zhang Beigene Ltd. Beijing 102206 P. R. China Molecular Medicine Center West China Hospital Sichuan University Chengdu SJchuan 610041 P. R. China Institute for Genomic Medicine and Shiley Eye Center University of California at San Diego La Jolla CA 92093 USA.

Cancer is a collection of complex diseases in which cell proliferation and apoptosis are dysregulated due to the acquisition of genetic changes in cancer *** genetic changes,combined with the interrelated physiologic adaptations of neo-angiogenesis,recruitment of stromal support tissues,and suppression of immune recognition,are measurable characteristics in tumor gene expression profiles and biochemical *** measures can lead to identification of disease drivers and,ultimately,can be used to assign *** advances in RNA sequencing technologies,the ability to simultaneously measure all genetic and gene expression changes with a single technology is now *** ability to create a comprehensive catalog of genotypic and phenotypic changes in a collection of histologically similar but otherwise distinct tumors should allow for a more precise positioning of existing targeted therapies and identification of new targets for intervention.

关键词：药物发现肿瘤基因表达谱开发抗癌中国平台基因变化

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High electrocatalytic hydrogen evolution activity on a coupled Ru and CoO hybrid electrocatalyst

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Journal of Energy Chemistry 2019年第10期28卷 143-147页

作者： Jia-Xin Guo Dong-Yang Yan kang-Wen Qiu Chuan Mu Dian Jiao Jing Mao Hui Wang Tao Ling key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

Hydrogen evolution reaction (HER) is an essential step in converting renewable energy to clean hydrogen fuel. Exploring highly efficient, stable and cost-effective electrocatalysts is of crucial significance for sustainable HER. Here, we report the design of a coupled ruthenium/cobalt oxide (Ru/CoO) hybrid electrocatalyst for alkaline HER. In this hybrid metal/oxide system, the complicated alkaline HER pathways are overall facilitated;oxygen (O)-vacancy-abundant oxide enhances water splitting and Ru promotes successive hydrogen intermediates to generate hydrogen. The resulting Ru/CoO hybrid electrocatalyst exhibits significantly promoted catalytic activity compared with benchmark Ru catalyst, displaying an overpotential of 55 mV to generate a HER current density of 10 mA cm^-2, comparable with the state-of-the-art Pt/C catalyst and the most efficient alkaline HER electrocatalysts. Furthermore, the strong interaction of Ru nanoparticles with oxide support and the in-situ growth of oxide support on conductive substrate guarantee the long-term stability of as-fabricated Ru/CoO hybrid electrocatalyst. This newly designed hybrid catalyst with abundant metal/oxide interfaces may pave a new pathway for exploring efficient and stable HER electrocatalysts.

关键词： Ruthenium Oxides Hybrid electrocatalyst Hydrogen evolution reaction

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THE CONSTRUCTION OF THE INTERFERENCE PLANE GRADIENTS IN LDA FOR INVESTIGATING THE CONDITIONAL HETERODYNE

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天津大学学报 1982年第2期 83-92页

作者： WANG SHI-kang

An experimental set-up of LDA with interference plane gradients is constructed to show the conditional heterodyne contribution. The separation factor （Sf） of two Doppler spectrum is calculated in the disc experiment We find that Sf has no maximum value, as one could be tempted to expect for the case Zv=Zmin. In a single lens set-up it is difficult to suppress the conditional heterodyne contribution Telescope-lens system can be used to obtain both the noncoherent detection for the conditional heterodyne and the larger separation factor Sf.

关键词： LDA THE CONSTRUCTION OF THE INTERFERENCE PLANE GRADIENTS IN LDA FOR INVESTIGATING THE CONDITIONAL HETERODYNE

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