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Farmers’precision pesticide technology adoption and its influencing factors:Evidence from apple production areas in China

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Journal of Integrative Agriculture 2023年第1期22卷 292-305页

作者： YUE Meng LI Wen-jing JIN Shan CHEN Jing CHANg Qian glyn JONES CAO Yi-ying YANg gui-jun LI zhen-hong Lynn JFREWER College of Economics and Management Huazhong Agricultural UniversityWuhan 430070P.R.China School of Natural and Environmental Sciences Newcastle UniversityNewcastle upon TyneNE17RUUK Institute for Agri-Food Research and Innovation Fera Science Ltd.York YO411LZUK Institute of Agricultural Economics and Development Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Information Technology Research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China RSK ADAS Ltd. Helsby WA60ARUK Key Laboratory of Quantitative Remote Sensing in Agriculture of Ministry of Agriculture and Rural Affairs Information Technology Research CenterBeijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China College of geological Engineering and geomatics Chang’an UniversityXi’an 710054P.R.China

The research aimed to understand farmers’willingness to adopt(WTA)and willingness to pay(WTP)for precision pesticide technologies and analyzed the determinants of farmers’*** used a two-stage approach to consider farmers’WTA and WTP for precision pesticide technologies.A survey of 545 apple farmers was administered in Bohai Bay and the Loess Plateau in *** data were analyzed using the double-hurdle *** results indicated that 78.72%of respondents were willing to apply precision pesticide technologies provided by service organizations such as cooperatives and dedicated enterprises,and 69.72%were willing to buy the equipment for using precision pesticide *** results of the determinant analysis indicated that farmers’perceived perceptions,farm scale,cooperative membership,access to digital information,and availability of financial services had significant and positive impacts on farmers’WTA precision pesticide *** membership,technical training,and adherence to environmental regulations increased farmers’WTP for precision pesticide ***,nonlinear relationships between age,agricultural experience,and farmers’WTA and WTP for precision pesticide technology services were found.

关键词： precision technologies apple production precision pesticides willingness to adopt willingness to pay

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L log L criterion for a class of multitype superdiffusions with non-local branching mechanisms

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Science China Mathematics 2019年第8期62卷 1439-1462页

作者： zhen-Qing Chen Yan-Xia Ren Renming Song Department of Mathematics University of Washington Seattle WA 98195 USA LMAM School of Mathematical Sciences & Center for Statistical SciencePeking University Beijing 100871 China Department of Mathematics University of Illinois Urbana IL 61801 USA

In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with nonlocal branching mechanisms under a martingale change of measure. As an application of this decomposition,we obtain a necessary and sufficient condition(called the L log L criterion) for the limit of the fundamental martingale to be non-degenerate. This result complements the related results obtained in Kyprianou et al.(2012),Kyprianou and Murillo-Salas(2013) and Liu et al.(2009) for superprocesses with purely local branching mechanisms and in Kyprianou and Palau(2018) for super Markov chains.

关键词： multitype superdiffusion non-local branching mechanism switched diffusion spine decomposition martingale

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塔里木盆地跃参地区YJ1X井超深层油藏演化

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石油勘探与开发 2022年第2期49卷 262-273页

作者：杨鹏刘可禹 LI zhen MCINNES Brent Ian Alexander 刘建良中国石油大学(华东)深层油气重点实验室山东青岛266580 海洋国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266071 John de Laeter Centre Faculty of Science and EngineeringCurtin UniversityPerth WA 6485Australia

基于原位方解石U-Pb定年、原油与储集岩烃类地球化学特征对比以及流体包裹体分析,恢复塔里木盆地塔北隆起西南部跃参地区YJ1X井奥陶系一间房组超深层油藏的充注与演化过程。研究结果表明:①原油、游离油以及包裹体油具有相似的地球化学... 详细信息

基于原位方解石U-Pb定年、原油与储集岩烃类地球化学特征对比以及流体包裹体分析,恢复塔里木盆地塔北隆起西南部跃参地区YJ1X井奥陶系一间房组超深层油藏的充注与演化过程。研究结果表明:①原油、游离油以及包裹体油具有相似的地球化学特征,其对应的烃源岩在相同的沉积环境中形成;②原油、游离油以及包裹体油具有相似的成熟度,计算得到的等效镜质体反射率值为0.80%~0.96%;③储集层中识别出两种不同类型的油包裹体组合,其中Ⅰ类代表充注过程中最初进入圈闭、气体相对饱和的原油,Ⅱ类代表油藏发生轻微轻烃泄漏后残留的欠饱和原油;④该油藏在距今约425 Ma的早泥盆世发生过1期油充注,尽管在中泥盆世发生过部分轻烃泄漏,但之后一直保存完好。该研究表明在盖层发育良好、构造相对稳定的含油气盆地超深层中存在潜在的古老油气藏,可为下步的超深层油气勘探提供借鉴。

关键词：油藏保存方解石U-Pb定年流体包裹体奥陶系超深层碳酸盐岩油藏塔里木盆地

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An L_2-theory for a class of SPDEs driven by Lévy processes

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Science China Mathematics 2012年第11期55卷 2233-2246页

作者： CHEN zhen-Qing KIM KyeongHun Department of Mathematics University of Washington Seattle WA 98195 USA School of Mathematics Beijing Institute of Technology Beijing 100081 China Department of Mathematics Korea University 1 Anam-dong Sungbuk-gu Seoul 136-701 Korea

In this paper we present an L 2-theory for a class of stochastic partial differential equations driven by Lévy *** coefficients of the equations are random functions depending on time and space variables,and no smoot... 详细信息

关键词：随机偏微分方程过程驱动随机函数空间变量光滑性时间

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Scaling limits of interacting diffusions in domains

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Frontiers of Mathematics in China 2014年第4期9卷 717-736页

作者： zhen-Qing CHEN wai-Tong (Louis) FAN Department of Mathematics University of Washington Seattle WA 98195 USA

We survey recent effort in establishing the hydrodynamic limits and the fluctuation limits for a class of interacting diffusions in domains. These systems are introduced to model the transport of positive and negative charges in solar cells. They are general microscopic models that can be used to describe macroscopic phenomena with coupled boundary conditions, such as the popula- tion dynamics of two segregated species under competition. Proving these two types of limits represents establishing the functional law of large numbers and the functional central limit theorem, respectively, for the empirical measures of the spatial positions of the particles. We show that the hydrodynamic limit is a pair of deterministic measures whose densities solve a coupled nonlinear heat equations, while the fluctuation limit can be described by a gaussian Markov process that solves a stochastic partial differential equation.

关键词： Hydrodynamic limit fluctuation interacting diffusion reflecteddiffusion Dirichlet form non-linear boundary condition coupled partiMdifferential equation martingales stochastic partial differential equation,guassian process

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On Heat Kernel Estimates and Parabolic Harnack Inequality for Jump Processes on Metric Measure Spaces

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Acta Mathematica Sinica,English Series 2009年第7期25卷 1067-1086页

作者： zhen-Qing CHEN Panki KIM Takashi KUMAgAI Department of Mathematics University of Washington Seattle WA 98195 USA and Beijing Institute of Technology Beijing 100081 P. R. China Department of Mathematics and Research Institute of Mathematics Seoul National University Seoul 151-742 South Korea Department of Mathematics Faculty of Science Kyoto University Kyoto 606-8502 Japan

In this paper, we discuss necessary and sufficient conditions on jumping kernels for a class of jump-type Markov processes on metric measure spaces to have scale-invariant finite range parabolic Harnack inequality.

关键词： Dirichlet form jump process jumping kernel parabolic Harnack inequality heat kernel estimates

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Nutrient uptake,physiological responses and growth of tobacco(Nicotiana tabacum L.)in soil under composite salt stress

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Pedosphere 2022年第6期32卷 893-904页

作者： Jian CUI Dongrui YAO Jing MA Xiefeng YE Ying PENg Jiaqian SONg Jinfeng LI Yajun CHANg John YANg zhen ZHANg Xueli LI Xiaojing LIU Khalil KARIMAN Institute of Botany Jiangsu Province and Chinese Academy of SciencesNanjing 210014(China) National Tobacco Cultivation and Physiology and Biochemistry Research Center Key Laboratory for Tobacco Cultivation of Tobacco IndustryCollege of Tobacco ScienceHenan Agricultural UniversityZhengzhou 450002(China) Shangluo Tobacco Company Luonan BranchShangluo 726000(China) School of Environmental Science Nanjing Xiaozhuang UniversityNanjing 211171(China) Department of Agriculture and Environmental Science Lincoln University of MissouriJefferson City MO 65201(USA) Staff Development Institute of China National Tobacco Corporation Zhengzhou 450000(China) School of Agriculture and Environment The University of Western AustraliaPerth WA 6009(Australia)

High soil salinity imposes osmotic stress and ion toxicity in plants,leading to substantial crop yield loss *** of the quantitative and dynamic physiological responses to composite soil salt stress is limited and needs to be *** this study,physiological,nutritional,and biomass yield parameters of tobacco(Nicotiana tabacum L.)grown in soil with five levels of composite soil salinity(CSS),basal CSS level(control,CK)and 3(T_(1)),6(T_(2)),9(T_(3)),and 12(T_(4))times the basal CSS level,under greenhouse were determined at days 30,60,and 90 after *** dry biomass significantly(Pgressively declined as the CSS level further *** leaf physiological and photosynthetic responses were more adversely affected by CSS at the early growth stage(day 30).A path coefficient analysis demonstrated that leaf proline content had the largest direct effect(-0.66),and leaf Cu content had the most significant indirect effect(0.49)on leaf dry biomass of *** results suggest that lower CSS levels(T_(1) and T_(2))could stimulate tobacco growth(leaf biomass yield,in particular),and higher leaf proline and Cu levels at the early growth stage may potentially increase the ability of tobacco plants to withstand the adverse effects of salinity,which could be considered for future research and development of salinity management strategies.

关键词： anti-adversity metabolite composite soil salinity hormone malondialdehyde proline translocation factor

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界面响应不可测的刚性耦合系统逆向子结构分析

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振动工程学报 2016年第4期29卷 603-608页

作者：王启利王军孙中振卢立新江南大学机械工程学院江苏无锡214122 江苏省食品先进制造装备技术重点实验室江苏无锡214122

获取产品运输系统的动态响应特性是进行缓冲包装设计的关键,逆子结构理论是一种在线预测部件频率响应函数的方法,大多数机电类产品的物流运输是通过螺栓等方式与货车、轮船等运载体直接刚性连接。由于耦合界面处物理空间的限制或者脆弱... 详细信息

获取产品运输系统的动态响应特性是进行缓冲包装设计的关键,逆子结构理论是一种在线预测部件频率响应函数的方法,大多数机电类产品的物流运输是通过螺栓等方式与货车、轮船等运载体直接刚性连接。由于耦合界面处物理空间的限制或者脆弱部件的干扰,难以在此同时进行激振和拾振,使得测量信息面临不完备的风险,传统的逆子结构理论是基于测量信息完备基础上的。提出利用虚拟质量法来获取耦合界面处难测频响函数的方法,建立基于虚拟质量法的界面响应不可测的刚性耦合逆子结构理论。然后利用集总参数模型对该理论进行了验证,结果显示预测值与计算值完全吻合,最后通过物理模型实验对该理论在实况条件下的有效性进一步验证。该方法为子结构解耦问题中的测量信息不完备问题提供了一种思路。

关键词：逆子结构频响函数刚性耦合虚拟质量法

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生物炭施加垄沟集雨种植对水土流失及紫花苜蓿草产量的影响

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草地学报 2024年第5期32卷 1314-1326页

作者：朱进辉赵武成 Erastus Mak-Mensah 王琦张登奎周旭姣赵晓乐戚文佳马文崔循臻李旭春刘冰甘肃农业大学草业学院甘肃兰州730070 甘肃省定西市水利科学研究所甘肃定西743000 甘肃省定西市水土保持科学研究所甘肃定西743000 中国科学院西北生态环境资源研究院临泽内陆河流域研究站/中国科学院内陆河流域生态水文重点实验室甘肃兰州730000

为缓解我国黄土高原区干旱胁迫和控制水土流失,本研究采用裂区设计,生物炭施加模式(生物炭施加和无生物炭施加)为主区,耕作模式(打结垄、开敞垄和平作)为副区,研究不同生物炭施加模式和耕作模式对土壤水分、径流、泥沙流失、养分流失、... 详细信息

为缓解我国黄土高原区干旱胁迫和控制水土流失,本研究采用裂区设计,生物炭施加模式(生物炭施加和无生物炭施加)为主区,耕作模式(打结垄、开敞垄和平作)为副区,研究不同生物炭施加模式和耕作模式对土壤水分、径流、泥沙流失、养分流失、紫花苜蓿(Medicago sativa L.)干草产量和水分利用效率的影响。试验结果表明,在2019和2020年紫花苜蓿生育期,与平作处理相比,开敞垄和打结垄处理的径流量、泥沙、全氮、全磷、有机质流失量分别减少20.1%~37.7%和60.1%~64.7%,54%~75.5%和77.1%~87.6%,44.4%~65.5%和49.0%~81.8%,36.7%~75.3%和48.6%~87.3%,48.2%~72.9%和58.6%~85.4%,土壤贮水量、紫花苜蓿干草产量和水分利用效率分别增加39.5~52.1和31.2~60.5 mm,26.2%~31.7%和26.5%~35.2%,10.07~14.86和12.14~16.55 kg·hm^(-2)·mm^(-1)。与无生物炭施加处理相比,生物炭施加处理的径流量、泥沙、全氮、全磷和有机质流失量分别减少48%~69%,94%~125%,12%~24%,28%~46%和35%~48%,土壤贮水量、紫花苜蓿干草产量和水分利用效率分别增加42.93~26.09 mm,106%~111%和1.96~6.90 kg·hm^(-2)·mm^(-1)。本研究表明,生物炭施加打结垄沟集雨种植是该区域适宜耕作模式。

关键词：生物炭添加模式耕作模式径流水土流失养分流失坡地

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Internal solitary waves in the East China Sea

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Acta Oceanologica Sinica 2008年第3期27卷 51-59页

作者： LI Xiaofeng ZHAO Zhongxiang HAN zhen XU Liuxiong Joint Center for Ocean Remote Sensing and Living Marine Resources Management Shanghai Fisheries University Shanghai 200090 China NOAA E/RA3 WWBG Camp Springs MD 20746 USA Applied Physics Laboratory University of Washington Seattle WA 98105 USA

A European Space Agency＇ s ENVISAT advanced synthetic aperture radar （ASAR） image covering Zhejiang coastal water in the East China Sea （ECS） was acquired on 1 August 2007. This image shows that there are about 20 coherent internal solitary wave （ISW） packets propagating southwestward toward Zhejiang coast. These ISW packets are separated by about 10 kin, suggesting that these ISWs are tide-generated waves. Each ISW packet contains 5-15 wave crests. The wavelengths of the wave crests within the ISW packets are about 300 m. The lengths of the leading wave crests are about 50 km. The ISW amplitude is estimated from solving KdV equation in an ideal two-layer ocean model. It is found that the ISW amplitudes is about 8 m. Further analysis of the ASAR image and ocean stratification profiles show that the observed ISWs are depression waves. Analyzing the tidal current finds that these waves are locally generated. The wavelength and amplitude of the ECS ISW are much smaller than their counter- parts in the South China Sea （SCS）. The propagation speed of the ECS ISW is also an order of magnitude smaller than that of the SCS ISW. The observed ISWs in the ECS happened during a spring tide period.

关键词： SAR Internal wave East China Sea

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