Results 21 to 30 of about 32,158 (231)
Analysis on the Impact and the Transmission Mechanism of the Global Oil Price Fluctuations on Chinese Agricultural Products Market [PDF]
, 2016 本文是在当前国际政治经济形势复杂多变，国际石油市场激烈震荡，而我国石油对外依存度持续攀升的形势下展开的一项全新的、富有战略意义的研究。长期以来，我国现行的成品油定价机制难以与国际油价保持一致，导致国内成品油价涨快跌慢、涨多跌少。国内大部分农产品价格难以形成市场化的自动调节机制，国际油价与农产品价格之间的传导滞后，国内资本市场的投机和套利行为也因此增多。随着我国农产品期货市场逐渐成熟，商品价格指数体系的建立与不断完善为本文研究国际油价波动对我国农产品市场的影响与传导机制提供了有力的条件 ...
曲旭芹
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo +8 more
wiley +1 more source
The Influence Mechanism of Family-Supportive Supervision on Employee Turnover Intention and Job Performance —Based on the Social Exchange Theory [PDF]
, 2016 现代组织成员既在组织中身居要职，同时要照顾家里的老人和小孩，工作、家庭的重担压得他们心力交瘁，导致员工工作效率低下、对工作失去热情、身心处于亚健康状态和家庭关系恶化等问题层出不穷。为解决这些问题，组织为员工提供家庭友好支持(familyfriendlybenefits)，协助员工减轻因工作-家庭冲突产生的困扰。但现实情况往往是员工有需求、企业有制度，但落实不到位，员工上级成为制度落实的关键。 上级家庭支持是指上级同情、理解员工在平衡工作与家庭方面的困难，并提供相应的支持和帮助 ...
陈晓雯
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Studies have shown that organisms may adjust metabolic rates in response to thermal variability, highlighting metabolic plasticity as a key adaptive mechanism. Understanding the extent of metabolic plasticity of an organism is key to predicting its adaptation to climate
Qian Hu +6 more
wiley +1 more source
智能科学与技术学报, 2019 针对矿山无人化的迫切需求与研究现状，提出了基于 ACP 方法的端对端平行无人矿山系统解决方案。首先分析了无人矿山运输系统的研究现状；设计了平行无人矿山的基本框架；提出了平行无人矿山运输系统的主要模块，包括：无人矿山管控中心、无人矿卡运输平台、半自主挖掘/铲运平台和远程接管平台4部分；并探讨了实现平行无人矿山系统的7个关键技术，即虚拟端平行矿山构建、矿山环境感知与定位、矿山设备的单机无人控制、多设备之间的协同作业、平行矿山管控、平行接管决策以及矿山网络通信 ...
杨超 +6 more
doaj
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
A Study of the External Supervision & Constraint [PDF]
, 2005 内容摘要检察权是我国权力体系的一个重要组成部分，但近年来中国司法改革的显著特征之一就是检察权不断被弱化,其中一个原因是理论界和实践界认为检察权缺少有效的外部监督制约机制。正是基于对这一严峻现实的不安，笔者作为检察机关的实务工作者，涉足这一领域的研究，以期引起更多人士对这一问题的关注和争鸣。笔者在分析比较了相关资料和诸多学者研究成果的基础上，在指导老师的启发下，形成了本文的整体思路和框架，试从理论和实践两个方面探讨检察权外部监督制约机制，运用比较、实证等分析方法，揭示当前检察权外部监督制约机制存在的问题 ...
王爱瑞
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Hobbyist preferences for pet freshwater turtles
Conservation Biology, EarlyView.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
A Research on the Performance Management System for Regional General Manager in A Logistics company [PDF]
, 2016 摘要 伴随经济的快速发展，全球物流行业蓬勃发展。物流行业发展迅速，竞争也越 来越激烈；企业之间的竞争归根到底是人才的竞争；如何激励和留住核心人才，绩 效管理是关键。本文以A物流公司为例，研究区域总经理的绩效管理机制，分析绩 效管理存在的问题，探索绩效改进相应的措施。 本文针对A物流公司绩效管理机制现状，重点从绩效计划、绩效执行、绩效评 价和绩效反馈方面，了解区域总经理月度和年度绩效管理机制现状，分析区域总经 理绩效考核机制存在问题，并对造成这些问题的成因进行研究。针对区域总经理绩 效管理机制存在的问题 ...
尹昌碧
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Evaluating past and future contributions of conservation programs to species recovery
Conservation Biology, EarlyView.Abstract Impact evaluation of conservation actions is a crucial step in global efforts to curb the biodiversity crisis. Through robust impact evaluation, practitioners can assess the effectiveness of conservation strategies and optimize the use of limited resources.
Rebeca E. Young +10 more
wiley +1 more source