Results 31 to 40 of about 20,582 (174)
The Research on the Project Management of the Model Change Time Compression in Factory A [PDF]
, 2016 换线时间的压缩，主要是针对换线前的材料、治具准备及人力安排，换线中的步序优化，以及换线后的当机、品质管控，做消除浪费、减少变异的分析及改善，最终在保证流程输出稳定的同时，压缩流程时间。 本论文主要是在面板业整体市场需求旺盛，但利润率低下的大环境下，结合A厂实际面临的因综合机台利用率漏失严重，而导致产能不足的实际情况，运用精益六西格玛的管理方法，对综合机台利用率漏失最为严重的换线时间进行压缩。整个过程按照精益六西格玛要求的定义、测量、分析、改善、控制五大步骤循序渐进。通过对全流程做浪费分析 ...
朱小勇
core
How much biotic nativeness matters across human demographic groups
Conservation Biology, EarlyView.Abstract Many central concepts of conservation biology—such as nativeness—are structured by ecological and social factors. However, the social consequences of using these concepts to make conservation decisions remain inadequately understood. Some researchers argue that nativeness, rather than acting as an objective proxy for important ecological ...
Harold N. Eyster, Rachelle K. Gould
wiley +1 more source
基于系统动力学模型的电力系统等效惯量时空演变趋势研究 [PDF]
全球能源互联网随着风电、光伏等新能源发电渗透率的不断提高，电力系统等效惯量水平不断下降且空间分布不均的特性日益凸显。而电力系统维持频率稳定的能力与系统等效惯量水平息息相关，因此明确电力系统等效惯量时空演变趋势具有重要意义。基于系统动力学模型，对电力系统等效惯量的时空演变趋势进行了分析。首先，明确新能源电力系统等效惯量概念及有效惯量组成，并分析惯量响应过程；其次，基于系统动力学模型，在考虑地域、技术进步率、综合成本等多因素影响下，对中国各地区光伏、风电、火电、水电、核电2025—2060年间的装机容量进行预测；最后 ...
刘学成 +7 more
doaj +1 more source
The experimental design and analysis for wavefront characterizing of an expended laser beam [PDF]
, 2015 激光波面分析与检测是精密测量技术的一个研究方向，它是建立在干涉测量技术的基础上而发展起来的。在经典物理学中，杨氏双缝干涉是最经典的干涉现象，这种干涉是基于等倾干涉原理通过条纹的变化来检测相干光束的波面特性。另外，基于等厚干涉技术发展起来的准直光检验器，在高效方便化的准直技术检验方面展现出了巨大的发展潜力。本文以由一块平行平晶组成的准直光检验器为核心，利用扩束镜改变633nmHe-Ne激光器的波面特性，在扩束镜光路轴后方，利用准直光检验器检验扩束激光波面特性 ...
林坤生
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Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
Research of Opto-electronic Integrated Receiver in Industrial Control for POF Communication [PDF]
, 2015 随着经济的飞速发展，传统的手工生产方式正逐步被自动化的生产方式取代。工人仅操作控制面板，将生产指令经传输媒介传达至自动化设备末端进行生产的方式是大势所趋。作为传输指令的载体，采用传统的铜线进行传输已无法确保数据完整性及工业精准度。符合“光进铜退”环保政策的新兴材料——塑料光纤(PlasticOpticalFiber,POF)因具有优异的电磁抗扰性和易接续、低成本的特性，日渐广泛的应用在工业控制、车载网络、音频数据传输等各种短距离通信领域。工业控制中，POF的使用可以隔离共模电压 ...
范程程
core
Conservation Biology, EarlyView.Abstract Recognition and engagement of Indigenous Peoples and local communities (IP&LCs) and other traditional knowledge (TK) holders in formal biodiversity governance remain limited, despite their significant contribution to the conservation and sustainable use of biodiversity through their knowledge, innovations, practices, and land stewardship.
Kinga Öllerer +8 more
wiley +1 more source
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Gaoya dianqi, 2000 新国家标准GB T 1692 7.2 - 1997《高电压试验技术第二部分 :测量系统》不仅对高电压量值的溯源提出了具体要求 ,而且提出了溯源的方法 ,这就是和标准测量系统进行比对测量。本文根据新国标讨论高电压测量系统的量值溯源问题。
史志侠
doaj