Results 71 to 80 of about 35,429 (238)

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

open access: yesConservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando   +54 more
wiley   +1 more source

LCC-MMC型三端混合直流输电系统控制策略研究

open access: yesGaoya dianqi, 2018
整流侧采用电网换相型换流器(line commutated converter,LCC),逆变侧采用模块化多电平换流器(modular multilevel converter,MMC)的混合型直流输电系统,结合LCC和MMC的优点,尤其适用于特高压直流输电应用场合。为了确保正常状态和故障状态下的稳定运行,文中针对混合型直流输电系统的控制策略进行研究。文中首先针对一个LCC整流站,两个MMC逆变站构成的三端混合直流系统,介绍了数学模型和整个直流系统的基本控制策略。然后针对基本控制策略下 ...
陈凌云   +6 more
doaj  

Challenges and suggestions for exergaming program in exercise among older adults. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban, 2023
Ning H   +5 more
europepmc   +1 more source

Quantization Strategy Based on Financial Performance Events [PDF]

open access: yes, 2016
量化投资作为一种基于数量金融理论发展起来的投资方法在国外已经有几十年的发展历史,因其具备传统投资方法所不具备的优势,在市场上受到越来越广泛的认可,一举成为与基本面分析、技术面分析并称的三大主流投资方法。以美国文艺复兴科技公司为代表的对冲基金管理公司,在资本市场不断摄取令人瞠目结舌的巨额收益,让量化投资一再成为欧美资本市场发展的热点与焦点。 2004年国内第一只量化投资基金“光大保德信量化核心基金”的成立,标志着量化投资开始成为中国资本市场中又一股新鲜力量。2015年量化投资在中国发展迅猛 ...
吴挺
core  

Centering geospatial data uncertainty and the potential for injustice in pastoralist rangeland conservation prioritization

open access: yesConservation Biology, EarlyView.
Abstract Procedural, distributional, recognitional, and epistemic justice aspects of conservation interventions are well documented in contexts where pastoralism is a key livelihood and way of life. Geospatial analyses and representations of wildlife conservation and restoration that are increasingly applied in pastoralist rangeland socioecological ...
Ryan R. Unks
wiley   +1 more source

GIS中局部放电绝缘缺陷综合检测诊断技术分析及应用

open access: yesGaoya dianqi, 2013
基于对多种检测技术应用特点的分析,提出一种有无异常的快速巡检、电检测确认异常及部位、辅助检测分析印证异常的三步序综合判断GIS中局部放电缺陷的诊断策略。针对一起110 kV GIS的绝缘缺陷,遵循综合检测策略,进行了测试分析。测试结果验证了该综合诊断策略的有效性,为准确判断运行中的GIS绝缘缺陷提供了一种新的诊断策略。
王科
doaj  

Analysis and teaching strategies of confusion words learning among intermediate Chinese learners in Thailand [PDF]

open access: yes, 2016
2013我在泰国当汉语家教时,接触了大量的泰国学生写作,在修改这些作文的过程中,发现学生的词语误用是最明显的,远远高于语法的使用偏误。大部分词语误用的字会在学生的作文中反复出现。这表明学生无法辨析词语的意义和用法而发生了词语使用上的混淆,而且这种现象还是群体性的,值得去做一下具体分析。同时,通过对HSK动态作文语料库泰国学生书面语语料的分析,我发现中级阶段的泰国学生在对汉语词语的理解和使用方面存在着偏误最多,严重限制了泰国学生提高的汉语水平。由于汉语词汇的用法具有灵活性 ...
SIWAPORN SAELIANG(梁翠婷)
core  

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

open access: yesConservation Biology, EarlyView.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift   +8 more
wiley   +1 more source

Home - About - Disclaimer - Privacy