Results 31 to 40 of about 949,091 (156)
Zhongguo shiyan zhenduanxue, 2017 目的采用Meta分析方法评价封闭抗体与反复自然流产的相关性。方法通过计算机检索中国知网、万方、维普和Medline数据库,收集1994年4月到2016年8月中国公开发表的所有关于封闭抗体与反复自然流产相关性的病例-对照研究,根据纳入和排除标准筛选文献,提取资料和质量评价,以合并比值比（odds ratio,OR）及其95%CI为效应指标,运用STATA12.0软件,进行Meta分析。结果经严格筛选后共纳入13篇文献,合计反复自然流产组5364例,对照组4774例。经Meta回归分析显示 ...
石瑛 +5 more
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Functional Ecology, Volume 40, Issue 6, Page 1725-1739, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root exudates play a key role as signals and nutrients in mediating plant–microbe communication. However, critical knowledge gaps remain regarding how root exudates mediate soil–microbe–plant interactions to regulate crop yield under long‐term straw mulching combined ...
Jiajie Song +7 more
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Shuitu Baochi Xuebao, 1995 影响泥石流流域产沙的自然因素众多，在地面因素中起重要作用的主要有地形地貌特征、地表覆盖类型、地质背景条件、不良地质现象等。本文在地理信息系统技术支持下，应用模糊数学的理论和方法建立了泥石注域产沙分级评价模型，该模型能准确客观地反映流域内不同区域产沙的情况，并能自动编制流域产沙强度分级图，为流域内泥石流松散固体物质储量的计算提供依据。
徐弘
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A more‐than‐human political ecology of Indonesian songbird trade
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Since its inception, conservation science has considered wildlife trade a problem. In focusing on conservation outcomes, conservationists almost completely ignore the welfare of traded animals and plants and the harms they endure. We developed a political ecology approach that incorporates the interconnectedness of people with animals and ...
Sicily Fiennes +9 more
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Zhongguo shiyan zhenduanxue, 2011 近年来,早孕自然流产的发病率有持续上升的趋势,患者有可能发展为复发性流产。早期自然流产是发病原因非常复杂,涉及妇产科学及基础医学许多学科。微炎症状态是指患者无全身或局部显性感染征象,但存在低水平、持续的炎症状态。炎症学说成为产科领域近几年来的研究热点[1 ...
徐又先 +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The large‐scale application of titanium is limited by its high production costs, as well as its low utilization and recycling rates. Therefore, efficient recovery of titanium scrap offers a viable pathway to reduce its cost. Molten‐salt electrolysis offers a promising route for upcycling titanium scrap, but the conventional method, which ...
Haoyu Fang +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Nickel‐based superalloys (Ni‐based superalloys) have attracted extensive attention in laser additive manufacturing (LAM) due to their capability to directly fabricate complex and high‐performance structural components. However, the rapid melting and solidification inherent to LAM result in intense thermal cycling, which induces high residual ...
Tianxiang Lin +9 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalysis has garnered unprecedented research enthusiasm for applications in energy and environmental fields, as it can harvest the tiny vibration energy from the natural environment and convert it into electrical energy to drive catalytic reactions.
Feixue Gao +9 more
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, 2003 由厦门大学财政系提供的2003年国有资产监管体制与公共财政制度改革国际会议论文集06本报告以经营性国有资产为研究对象，对人们普遍关注的国有资产流失问题进行了系统分析。首先从现象入手，将社会经济生活中典型性的国有资产流失归纳为五种表现形式:合资过程中的国有资产流失、股份制改造过程中的国有资产流失、企业内部控制薄弱形成的流失、承包体制下造成的流失以及决策失误造成的流失。然后，从国有企业所有者缺位、人事制度缺失、监督机构和法制不健全、经营者诚信度下降等方面深入分析了国有资产流失的根源。最后 ...
《防治国有资产流失问题研究》课题组
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Shuitu Baochi Xuebao, 2016 为明确玉米全生育期自然降雨特征以及坡耕地产流产沙规律，以研究区自然降雨为基础，采用野外径流小区和室内分析相结合的方法，分别对横坡垄作、平作和顺坡垄作坡面玉米全生育期（苗期、拔节期、抽雄期和成熟期）的自然降雨、径流及侵蚀产沙量进行了测定。结果表明：研究区2015年玉米全生育期内雨量为676.71 mm，其中成熟期侵蚀性雨量达411.71 mm，占累计侵蚀性雨量的69.85%。玉米全生育期内，产流受雨量、玉米生育期显著影响，横坡垄作产沙受雨量、雨强的影响显著，而平作和顺坡垄作则受雨量、株高的影响显著 ...
杨, 尹, 郑子成, 李廷轩
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