Results 41 to 50 of about 20,854 (167)

Design and Implementation of the Online Vocal Music Teaching Assistant System [PDF]

open access: yes, 2015
当今社会,互联网已经深入到日常生活的方方面面,成为了人们生活中不可缺少的一部分。在声乐教学工作中,不断地有老师学生提出在教学工作中急需解决的问题。如由于教学时间不足,教师没有足够的课堂时间为学生进行全面的声乐技巧教授、教师布置的课后作业需要统一查看评分留底,工作量大、除课堂时间外,师生间缺乏沟通渠道等。 针对这些问题,设计实现一个声乐教学辅助系统变得极为必要。一方面要具有完整的管理概念,需要理顺教师、课程、班级、学生之间的相互关系。老师只需要按照课程安排把每一次课程所需教授的演唱技巧录制成视频并上传 ...
沈明春
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Strengthening community‐based fisheries monitoring programs with Indigenous perspectives

open access: yesConservation Biology, EarlyView.
Abstract Community‐based monitoring (CBM) programs are increasingly recognized as essential for adaptive environmental stewardship. Yet, the CBM literature often highlights successful cases and privileges evaluations by external experts over those of community members themselves.
Kanwaljeet Dewan   +2 more
wiley   +1 more source

高可靠性光纤接入网的设计

open access: yesGuangtongxin yanjiu, 1998
首先介绍接入网的概念及特点,然后着重论述了高可靠性光纤接入网设计的方法,阐述设计中用到的路由构造算法和可靠性计算方法,并与传统方法进行了比较。最后,得出新方法比传统方法经济、可靠。
马蕴颖, 马诗英
doaj  

Prioritizing bat roosts for conservation with a global multicriteria bat roost priority index based on community science

open access: yesConservation Biology, EarlyView.
Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch   +6 more
wiley   +1 more source

Design and Realization of Talent Resources Statistical System in Guizhou Province [PDF]

open access: yes, 2015
为了摸清贵州省人才资源家底,全面动态掌握贵州省人才资源发展、分布等情况,贵州省人才工作领导小组决定在全省范围内开展全口径人才资源统计。全口径人才资源统计涉及面广,包括全省党政机关、事业单位、公有制经济领域企业、非公有制经济领域企业和农村实用人才等人才队伍,覆盖贵州省9个市州和88个县区,统计工作量大,如采用纸质或Excel表格上报不现实,数据汇总分析难度较大,且误差也较大。因此,研究设计贵州省人才资源统计网络直报系统是完成全省人才资源统计的最好途径。 本论文主要研究贵州省人才资源统计网络直报系统需求分析、
邓书银
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Assessing the integration of social marketing principles in ivory demand management interventions in China and Southeast Asia

open access: yesConservation Biology, EarlyView.
Abstract Consumer demand for ivory perpetuates the unsustainable and illegal killing of African elephants and other wildlife species. Interventions that aim to change consumer behavior are increasingly recognized as a crucial element of demand management. However, poor design and implementation have limited their effectiveness.
Molly R. C. Brown   +2 more
wiley   +1 more source

内齿轮插齿刀优化设计及其通用程序

open access: yesJixie chuandong, 1989
插齿是目前应用最广泛的内齿轮加工方法之一,尤其是内齿轮的加工,一般都采船插齿。插齿刀的设计质量不仅影响齿轮的加工质量,而且决定了刀具的耐用度和使用寿命。传统的插齿刀设计方法不仅计算工作量大、设计效率较低,而且往往不能获得最隹设计方案。本文提出了一种设计渐开线直齿内齿轮插齿刀的优化方法,并介绍了一个通用程序。借助计算机不但能使设计效率大大提高,而且可以得到一个某种意义上的最佳设计方案,从面提高了插齿刀的设计质量。
董献坤
doaj  

Optical design of LED secondary lens [PDF]

open access: yes, 2016
在经历半个多世纪的技术变革后,目前以LED为首的半导体照明已进入高速发展的时代。LED照明具有节能环保、使用寿命长、高光效等优势,被广泛应用于新能源、室内外照明、汽车照明、投影显示和背光等众多领域,是21世纪最具价值的新型光源。 本文简要概述了非成像光学发展史及其在应用领域的大致情况。理论上介绍了非成像光学系统中能量收集率、光学扩展量和拉格朗日不变量的相关概念并分析了三者之间的关系,为自由曲面面型的设计奠定理论基础。 本文在实例中对LED配光器件进行分类并对各类配光器件的性质、性能、母线方程进行简单介绍,
王海丰
core  

Comprehensive framework for assessing and optimizing existing research networks

open access: yesConservation 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

Study on New Product Development Quality Management of A Company based on DFSS [PDF]

open access: yes, 2016
产品研制的合格率低、可靠性差以及用户体验感不好是很多企业的常见问题。研究发现:造成研发质量此类问题的主要原因为企业在产品设计过程对客户需求的理解有偏差,未能在研发阶段尽早发现潜在质量问题,导致产品设计不够稳健。研究一个适合研发型企业的开发管理体系,并寻找合适产品开发设计的控制方法和模式来保证产品开发设计的过程得到充分管控,保证产品研发质量成为一个迫切需求。特别在客户需求识别、产品的失效模式和关键质量控制点的识别等关键环节过程,以及在设计参数和容差上缺乏管控和优化的过程探索一个合适的管理方法 ...
钟嘉强
core  

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