Results 21 to 30 of about 32,470 (201)

Parametric modeling of 3D fish body(三维鱼体参数化建模)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2022
因水下环境复杂,鱼类三维模型获取非常困难,基于三维鱼类数据驱动的很多自动化研究工作无法开展。为此,提出一种三维鱼体参数化建模方法。首先,用专业建模师构建的标准鱼体模板注册扫描仪采集三维鱼体数据,构建拓扑结构一致的三维鱼体网格数据集;其次,用主成分分析法对数据集中的三维鱼体网格模型进行建模分析,建立鱼体的参数化表示模型;最后,采集草鱼数据进行相关实验。实验结果表明,注册得到的三维鱼体模型与真实扫描鱼体模型顶点之间的平均均方根误差仅为0.691 3 mm,在可接受范围 ...
HUHaitao(胡海涛)   +4 more
doaj   +1 more source

The Influence Mechanism of Family-Supportive Supervision on Employee Turnover Intention and Job Performance —Based on the Social Exchange Theory [PDF]

open access: yes, 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
core  

Effects of political identity activation and inaccurate metaperceptions on attitudes toward wolves

open access: yesConservation Biology, EarlyView.
Abstract Polarization between groups can undermine durable conservation outcomes. Activating group identities (i.e., an individual's sense of self derived from membership in a group) can exacerbate differences, especially when people hold inaccurate perceptions of their peers and rivals.
Alexander L. Metcalf, Justin W. Angle
wiley   +1 more source

端对端平行无人矿山系统及其关键技术

open access: yes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  

The clone, prokaryotic expression of cry2Ab30 gene and its insecticidal mechanism against Plutella xylostella L. [PDF]

open access: yes, 2015
Cry毒素是苏云金芽胞杆菌(Bt)产生的δ内毒素之一,其特征是对多种农业害虫均具有杀虫毒性,被广泛应用于微生物农药及转基因植物中。 本研究以福建省农科院分离保存的高毒力Bt菌株FJAT-12为模板,克隆得到一个新的cry2Ab基因,多序列比对结果显示该cry2Ab基因有2个保守性位点发生突变,为第四类新基因,并被命名为cry2Ab30。构建pET30a-cry2Ab30原核表达载体,表达Cry2Ab30蛋白并利用WesternBlot进行验证;分别从诱导剂IPTG浓度 ...
许炼
core  

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

open access: yesConservation Biology, EarlyView.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li   +8 more
wiley   +1 more source

A Study of the External Supervision & Constraint [PDF]

open access: yes, 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
core  

An experimental approach to assess the combined effects of multiple stressors on a large vertebrate species

open access: yesConservation Biology, EarlyView.
Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta   +24 more
wiley   +1 more source

A Research on the Performance Management System for Regional General Manager in A Logistics company [PDF]

open access: yes, 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
core  

Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities

open access: yesConservation Biology, EarlyView.
Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner   +10 more
wiley   +1 more source

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