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Characterizing the effects of climate change on short-term post-disturbance forest recovery in southern China from Landsat time-series observations(1988-2016)

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Frontiers of Earth Science 2020年第4期14卷 816-827页

作者： Fangyan Zhu heng wang Mingshi Li Jiaojiao Diao Wenjuan Shen Yali Zhang Hongji Wu College of Forestry Nanjing Forestry UniversityNanjing210037China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing210037China

Climate change,a recognized critical environmental issue,plays an important role in regulating the structure and function of forest ecosystems by altering forest disturbance and recovery *** research focused on exploring the statistical relationships between meteorological and topographic variables and the recovery characteristics following disturbance of plantation forests in southern *** used long-term Landsat images and the vegetation change tracker algorithm to map forest disturbance and recovery events in the study area from 1988 to *** multiple linear regression(MLR),random forest(RF)regression,and support vector machine(SVM)regression were used in conjunction with climate variables and topographic factors to model short-term forest recovery using the normalized difference vegetation index(NDVI).The results demonstrated that the regenerating forests were sensitive to the variation in *** fitted results suggested that the relationship between the NDVI values of the forest areas and the post-disturbance climatic and topographic factors differed in regression *** RF regression yielded the best performance with an R2 value of 0.7348 for the validation *** indicated that slope and temperature,especially high temperatures,had substantial effects on post-disturbance vegetation recovery in southern *** other mid-subtropical monsoon regions with intense light and heat and abundant rainfall,the information will also contribute to appropriate decisions for forest managers on forest recovery ***,it is essential to explore the relationships between forest recovery and climate change of different vegetation types or species for more accurate and targeted forest recovery strategies.

关键词： climate change forest disturbance forest recovery vegetation change tracker

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Comparative Proteomic Analysis of Cucumber Fruits Under Nitrogen Deficiency At the Fruiting Stage

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Horticultural Plant Journal 2021年第1期7卷 59-72页

作者： Jia Hao Qiang Li Hongjun Yu heng wang Lin Chai Tiantian Miao Weijie Jiang Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijing 100081China

Nitrogen deficiency is a major factor that affects the yield and quality of horticultural *** expressed proteins were identified in cucumber fruit under nitrogen deficiency treatment,and are expected to be highly useful for dissecting carbon,nitrogen and ascorbate metabolism in cucumber and for improving nitrogen fertilizer *** plants grown hydroponically in Hoagland solution were transferred to nitrogen-free conditions for 3 or 5 d after the blossom of female *** proteome profiles were assessed using twodimensional *** relative expression of the genes encoding 50 selected differentially expressed proteins and 4 key enzymes in carbon metabolism was analyzed by *** showed that most of the identified differentially expressed proteins were mainly associated with carbon metabolism,amino acid biosynthesis,ascorbate metabolism,and *** phosphorylation was enhanced,while the pentose phosphate pathway was *** metabolism and the synthesis of most amino acids was affected significantly,and ascorbate might be accumulated under nitrogen deficiency in cucumber fruit.

关键词： cucumber fruit nitrogen deficiency proteomics

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An effects analysis method for C4ISR system structure based on information flow 36

An effects analysis method for C4ISR system structure based ...

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第36届中国控制会议

作者： Zhang Jinfeng Zhu Chen Huang Songhua Yi Kan wang heng Information Systems Engineering Laboratory

ISBN: (纸本)9781538629185

Aiming at the impact of cyber attack threat on the performance of C4 ISR system,a structural effect modeling and simulation method of C4 ISR system based on information flow model is ***,the connotation of C4 ISR system structure effect is expounded,and two kinds of attack modes and three kinds of attack strategies are put *** structure information flow model is *** on this,the mathematical model of the damage degree for system structure based on the information flow and mathematical model of fallback effect for system structure based on the information flow delay are ***,the method of C4 ISR system structure effect simulation is validated by taking the simulation experiment of a regional command and control system as an example.

关键词： attack strategy information flow model damage effects fallback effect

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NONCONFORMING FINITE ELEMENT APPROXIMATIONS TO THE UNILATERAL PROBLEM

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Journal of Computational Mathematics 1999年第1期17卷 15-24页

作者： Lie-heng wang(State Key Laboratory of Scientific and Engeneering Computing, ICMSEC,Chinese Academy of Sciences, Beijing 100080, China) 中科院计算数学与科学工程计算所科学与工程计算国家重点实验室北京

The nonconforming finite element (two Crouzeix-Raviart linear elements and Wilson element) approximations to the unilateral problem are considered. The error bounds for these elements are obtained in the appropriate a... 详细信息

关键词： unilateral problem nonconforming finite element

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Principle of Hydrogen Isotope Geochemistry Paleo-altimeter and its Potential in Reconstructing Paleo-elevation of the Southeastern Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 1051-1063页

作者： CUI Fengzhen LIU-ZENG Jing LI Yunshuai XU Qiang TANG Maoyun wang heng SUN Zhaotong School of Earth System Science Tianjin UniversityTianjin 300072China State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China School of Earth Science and Technology Southwest Petroleum UniversityChengdu 610500China Chongqing Earthquake Agency Chongqing 401147China

The reconstruction of paleo-elevation serves a dual purpose to enhance our comprehension of geodynamic processes affecting terrestrial landforms and to contribute significantly to the interpretation of atmospheric circulation and *** oxygen(δ~(18)O_w)and deuterium(δD_w)isotopes in atmospheric precipitation are systematically depleted with the increase of altitude,which are typical and widely applicated *** utilization of hydrogen isotope of hydrous silicate minerals within the shear zone system,volcanic glass,and plant leaf wax alkanes offers valuable insights for addressing evaporation and *** this paper,we review the principle,application conditions,and influencing factors of the hydrogen isotope *** addition,we discuss the feasibility of utilizing this technique for quantitatively estimating the paleo-elevation of the southeastern Tibetan Plateau,where multiple shear zones extend over hundred kilometers parallel to the topographic gradient.

关键词： paleo-elevation hydrogen isotope hydrous silicate minerals volcanic glass Tibetan Plateau

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Spectral Properties of Anomalous X-ray Pulsars

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Chinese Journal of Astronomy and Astrophysics 2003年第6期3卷 543-550页

作者： Ye Lu, Wei wang and Yong-heng ZhaoNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 National Astronomical Observatories CAS NAOC Beijing 100012 China

We examine the spectra of the persistent emission from anomalous X-ray pulsars (AXPs) and their variation with the spin-down rate . Based on an accretion-powered model, the influences of both the magnetic field and the mass accretion rate on the spectral properties of AXPs are addressed. We then investigate the relation between the spectral property of AXPs and mass accretion rate . The result shows that there exists a linear correlation between the photon index and the mass accretion rate: the spectral hardness increases with increasing . A possible emission mechanism for the explanation of the spectral properties of AXPs is also discussed.

关键词： pulsars: general stars: neutron X-rays: stars accretion: accretion disks

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Endocrine Disruption of Cadmium in Rats Using the OECD Enhanced TG 407 Test System

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Biomedical and Environmental Sciences 2014年第12期27卷 950-959页

作者： wang heng Juan LIU Zhao Ping JIA Xu Dong CHEN Hao TAN Yan Jun Key Laboratory of China National Center for Food Safety Risk Assessment NHFPC

Objective To evaluate the endocrine disrupting effects of cadmium （Cd） using OECD enhanced TG407 test guideline. Methods Sprague-Dawley （SD） rats were randomly divided into six groups and accordingly administered with 0, 1, 2.5, 5, 10, 20 mg/***/day of Cd by gavage for 28 days. Body weight, food consumption, hematology, biochemistry, sex hormone levels, urinary β2-microglobulin, organ weights and histopathology and estrous cycle were detected. Results Cd could significantly decrease animals＇ body weight （P〈0.05）. Serum luteinizing hormone （LH） at 10-20 mg/*** groups and testosterone （T） at 2.5 and 10 mg/*** groups decreased significantly （P〈0.05）. However, no statistically significant change was found in urinary β2-microglobulin among Cd-treatment groups （P〉0.05）. Endpoints related to female reproduction including uterus weight and histopathological change at 10-20 mg/*** groups showed significant increase （P〈0.05）. While among male rats in 2.5, 10, 20 mg/*** groups, weight of prostate, thyroids, and seminal vesicle glands significantly decreased （P〈0.05）. Moreover, no histopathological change was observed in kidney. Conclusion Results suggested that Cd can cause endocrine disrupting effects in SD rats. Comparing with possible renal toxicity of Cd, its toxicity on endocrine system was more sensitive.

关键词： OECD Enhanced Test Guideline 407 Endocrine Disrupting Cadmium Renal toxicity

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Polymorphisms of potential drug resistant molecular markers in Plasmodium vivax from China-Myanmar border during 2008-2017

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Infectious Diseases of Poverty 2022年第2期11卷 93-94页

作者： Zhensheng wang Chunyan Wei Yunchun Pan Zhihua wang Xin Ji Qianqian Chen Lianhui Zhang Zenglei wang heng wang Department of Microbiology and Parasitology Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical College5#Dong Dan San TiaoBeijing 100005People’s Republic of China NHC Key Laboratory of Systems Biology of Pathogens Institute of Pathogen BiologyChinese Academy of Medical Sciences and Peking Union Medical College9#Dong Dan San TiaoBeijingPeople’s Republic of China 不详

Background:Plasmodium vivax remains the predominant species at the China–Myanmar border,imposing a major challenge to the recent gains in regional malaria *** closely supervise the emerging of drug resistance in this area,we surveyed the variations in genes potentially correlated with drug resistance in *** parasite and the possible drug selection with ***:A total of 235 *** samples were collected from patients sufering uncomplicated malaria at Yingjiang,Tengchong,and Longling counties,and Nabang port in China,Yunnan province,and Laiza sub-township in Myanmar,from 2008 to *** potential drug resistance genes were amplifed utilizing nested-PCR and analyzed,including pvdhfr,pvdhps,pvmdr1,pvcrt-o,and *** Pearson’s Chi-squared test or Fisher’s exact test were applied to determine the statistical frequency diferences of mutations between categorical ***:The pvdhfr F57I/L,S58R,T61M and S117T/N presented in 40.6%,56.7%,40.1%,and 56.0% of the sequenced *** isolates,and these mutations signifcantly decreased with *** haplotype formed by these quadruple mutations predominated in Yingjiang,Tengchong,Longling and *** a mutation H99S/R(56.6%)dominated in Laiza and increased with *** pvdhps,the A383G prevailed in 69.2% of the samples,which remained the most prevalent ***,a signifcant decrease of its occurrence was also noticed over the *** S382A/C and A553G existed in 8.4% and 30.8% of the isolates,*** pvmdr1,the mutation Y976F occurred at a low frequency in 5/232(2.2%),while T958M was fxed and F1076L was approaching fxed(72.4%).The K10 insertion was detected at an occurrence of 33.2% in pvcrt-o,whereas there was no signifcant diference among the sites or over the *** mutation was identifed in ***:Mutations related with resistance to antifolate drugs are prevalent in this area,while their frequencies decrease signifcantly with time,suggestive of increased suscep

关键词： Plasmodium vivax Antimalarial drug Drug resistance Molecular marker China-Myanmar border

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CmFTL2 is involved in the photoperiod- and sucrose-mediated control of flowering time in chrysanthemum

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Horticulture Research 2017年第1期4卷 374-379页

作者： Jing Sun heng wang Liping Ren Sumei Chen Fadi Chen Jiafu Jiang College of Horticulture Nanjing Agricultural UniversityNanjing210095China

The chrysanthemum genome harbors three FT-like genes:CmFTL1 and CmFTL3 are thought to act as regulators of floral induction under long-day(LD)and short-day(SD)conditions,respectively,whereas the function of CmFTL2 is currently *** objective of the present research was to explore the function of CmFTL2 in the determination of flowering time of the photo-insensitive chrysanthemum cultivar‘Floral Yuuka’,both in response to variation in the photoperiod and to the exogenous provision of *** leaves of‘Floral Yuuka’plants with 50 mM sucrose accelerated flowering and increased the level of CmFTL2 transcription in the leaf more strongly than either CmFTL1 or FTL3 under both long and SD *** profiling indicated that all three CmFTL genes were upregulated during floral *** relationship of the CmFTL2 sequence with that of other members of the PEBP family suggested that its product contributes to the florigen rather than to the anti-florigen *** heterologous expression of CmFTL2 in the Arabidopsis thaliana ft-10 mutant rescued the mutant phenotype,showing that CmFTL2 could compensate for the absence of *** results suggest that CmFTL2 acts as a regulator of floral transition and responds to both the photoperiod and sucrose.

关键词： photoperiod floral harbor

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Spatial Perception Reproduction of Sound Event Based on Sound Properties

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Wuhan University Journal of Natural Sciences 2015年第1期20卷 34-38页

作者： ZHANG Maosheng HU Ruimin CHEN Shihong wang Xiaochen JIANG Lin wang heng National Engineering Research Center for Multimedia Software Wuhan University

A new method for estimating gain factors in amplitude panning system is proposed. The method is based on particle ve- locity and balanced sound energy formulation. A scale factor is employed in amplitude panning system and thus, an overdeter- mined system of equation is derived in particle velocity equation. To obtain the analytic solution of the overdetermined equation, the sound energy identical formula is considered and then the unique gain factors are estimated. The proposed method is able to repro- duce sound source direction and control the distance perception in a flexible twoor three-dimension loudspeaker setup. Subjective evaluations show that the proposed technique in an aspheric loudspeaker setup maintains the sound direction and controls the distance perception at the listening point.

关键词： reproduction direction particle velocity perception

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