Results 81 to 90 of about 1,579,839 (226)
Gaoya dianqi, 2012 到目前为止,已有大量文献介绍了各类绝缘子的人工污秽试验结果,少有文献涉及交直流人工污秽试验电源的特性试验研究。特高压交直流污秽试验电源电压高,电源特性实现难度大,因此需要对电源特性进行试验研究,探索交直流污秽电源的参数特性及其规律。昆明特高压实验室污秽实验室开展了一系列特高压交直流污秽电源的特性试验研究。研究成果一方面为人工污秽试验的理论研究和工程应用提供依据,同时为待建或已建交直流污秽试验电源的特性试验研究提供参考。文中说明了污秽交直流试验电源的工作原理和性能要求 ...
丁薇 +4 more
doaj
The obsolescence of protected area categories in a polycrisis world
Conservation Biology, EarlyView.Abstract Current global conservation models face significant limitations in addressing the global polycrisis, and the constraints of the International Union for Conservation of Nature protected area (PA) classification system are part of the issue. The principles of the new conservation paradigm—governance, equity, and interculturality—are not viable ...
Pamela Esther Degele
wiley +1 more source
, 1994 研究了体积容重为Ｃ＿ｖ＝０．０５７～０．４１连云港西墅地区淤泥的流变特性和弹性模量。在剪切率的变化范围２×１０￣（－２）ｓ￣（－１），淤泥具有三种不同的流变特性，在很低剪切率情况下，淤泥剪切力基本保持常值；在低剪切率范围，表现为宾汉流体性质，其屈服应力和宾汉动性系数以Ｃ＿ｖ指数增长；在高剪切率，淤泥流动体现出宾汉伪塑性特征，划分三个特征区的临界剪切率值是随淤泥含水量变化，最后指出，连云港淤泥弹性模量与高岭土结果很相近 ...
呼和敖德 +3 more
core +2 more sources
Early outcomes of England's new biodiversity offset market
Conservation Biology, EarlyView.Abstract Nature markets are being operationalized as a tool to address the biodiversity finance gap and achieve global biodiversity targets. However, there is limited understanding of how the outcomes of these markets align with biodiversity targets.
N. E. Duffus +3 more
wiley +1 more source
, 2008 本发明涉及分子标记方法，针对目前水稻育种中糯性基因不易识别的问题，本发明公开了一种通过特异性DNA片段识别水稻糯性基因的分子标记方法，以水稻糯性Wx基因的特异性片段为核心序列设计并合成引物，利用该引物对待测水稻样品的DNA进行PCR扩增，通过对扩增产物的检测，以扩增产物中是否含有全部或部分特异性片段来识别待测样品中是否含有水稻的糯性Wx基因，本方法能专一性的识别水稻糯性Wx基因，用于糯稻的新品种选育，可缩短糯稻新品种的育种周期 ...
孙华钦, 罗科, 田洁
core
Protected areas on international borders show uneven conservation outcomes
Conservation Biology, EarlyView.Abstract Border protected areas (BPAs) are national protected areas that are immediately adjacent to a country's border or span two or more countries; they are characterized by distinctive opportunities and pressures. They play a critical role in protecting carbon‐rich ecosystems, conserving endangered biodiversity, reducing cross‐border environmental ...
Rachakonda Sreekar +10 more
wiley +1 more source
, 2011 [[abstract]]本研究的目的在於探討特殊教育評量工具的需求狀況，以及特殊教育評量的相關問題。為達此目的，本研究採文獻分析法與問卷調查法，一方面分析測驗工具的基本特性（標準化常模建立的時間、地區，及信度、效度資料），以確定品質合格之測驗的數量；另一方面並徵詢特殊教育工作者（含專家學者及熟悉特殊教育評量事務的中小學老師）對測驗工具之需求狀況及評量特殊兒童相關的意見。在問卷的寄發上，429份問卷中，專家學者的部分寄出72份收回59份，回收率為81.9%；中小學老師的部分寄出357份收回286份 ...
周臺傑; 吳訓生 +1 more
core
Integrating biodiversity protection into emergency management
Conservation Biology, EarlyView.Abstract Megafires have emerged as a considerable threat to biodiversity conservation worldwide. The biodiversity‐focused response and recovery actions that occurred during Australia's 2019/2020 Black Summer bushfires demonstrate that it is possible to protect biodiversity alongside human life and property during disasters.
Jacey Roche Cerda +2 more
wiley +1 more source
A new place for stories in conservation
Conservation Biology, EarlyView.Abstract Michael Soule writes in his foundational article “What is Conservation Biology?” that “in crisis disciplines, one must act before knowing all the facts; crisis disciplines are thus a mixture of science and art, and their pursuit requires intuition as well as information.” Since this article was published three decades ago, conservation biology
Alex McInturff
wiley +1 more source
基于CT的影像组学列线图对布鲁氏菌性脊柱炎和脊柱结核的鉴别价值
Zhongguo shiyan zhenduanxue目的基于CT的影像组学列线图鉴别布鲁氏菌性脊柱炎（BS）和脊柱结核（TBS）。方法回顾性分析2018年1月至2023年3月94例布鲁氏菌性脊柱炎及脊柱结核患者的临床资料及CT图像，按照7∶3随机分为训练集和测试集。基于训练集数据，对临床及常规CT征象进行组间差异性分析，并采用多因素logistic回归构建临床模型。基于CT图像提取影像组学特征，并筛选出最优特征计算影像组学评分（Radscore）。联合Radscore、临床特征构建联合模型并绘制列线图。采用受试者工作特征曲线下面积（AUC）、特异性 ...
奇丽霞 +7 more
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