Results 41 to 50 of about 9,644 (161)
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
doaj +2 more sources
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
doaj
用全染色体涂抹探针进行卵母细胞第一极体荧光原位杂交 [PDF]
, 2006 【目的】建立用全染色体涂抹探针（WCP）对卵子第一极体进行荧光原位杂交（FISH）检测染色体的方法。【方法】收集单精子卵胞浆内注射（ICSI）中不成熟卵母细胞经体外培养成熟和常规试管婴儿（IVF）中未能成功受精的成熟卵母细胞，活检第一极体，固定后行13、14号染色体的全染色体涂抹探针荧光原位杂交。活检后，一部分卵母细胞固定行FISH以分析卵子自身的13、14号染色体，其余行ICSI受精，观察受精和卵裂情况。【结果】共获得成熟母细胞93个，成功活检85个，成功固定78个，共29个第一极体处于分裂中期 ...
任秀莲 +5 more
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Objective: To investigate the correlation of the gestation period age and the GDM disease rate among the gestational women who are treated in our hospital.
Ge, Yue-ping, Liu, Li, Yan, Shu-ping
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Vanadium oxides are deemed competitive cathode candidates for aqueous zinc‐ion batteries (AZIBs), benefited from their high theoretical capacity and multiple crystalline structures. However, the sluggish reaction kinetics, poor reversibility, and high solubility have hindered the practical application.
Xiaoyu Fan +7 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 1, Page 163-175, January 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grazing by large herbivores is a critical factor shaping grassland biodiversity and ecosystem functioning worldwide, yet its consequences for soil communities remain poorly understood.
Quanhui Ma +12 more
wiley +1 more source
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
doaj
Integrative Conservation, Volume 4, Issue 4, Page 675-685, December 2025.We demonstrated that Anguilla japonica eDNA concentration was allometrically scaled with their body size in both the laboratory and riverine environments. Integrating body size allometry has the potential to improve population abundance estimates in the field, whereas further clarification is required for understanding eDNA production mechanisms ...
Toshiaki S. Jo +2 more
wiley +1 more source
, 2004 【目的】评价开腹卵巢楔形切除(OWR)和腹腔镜下双侧卵巢电灼开窗术(LOD)两种术式对多囊卵巢综合征(PCOS)的远期疗效?【方法】 1981至2001年在我院诊断为PCOS并接受手术治疗的妇女共151例,其中行OWR 61例?LOD 90例,追踪分析两组妇女术后妊娠率?术后妊娠时间的分布及术前后月经模式变化?【结果】 两组的临床特征具有可比性, OWR组累积妊娠率84%,LOD组累积妊娠率72%,两组间没有明显差异,绝大部分妊娠发生在术后18个月内;OWR组术后3个月?半年?1年?3年 ...
冯淑英, 陈勍
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Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 4, December 2025.ABSTRACT Background Hazardous levels of contaminants produced by anthropogenic activities are increasingly pervading residential environs and urban areas. Hazardous contamination can pose significant health risks for citizens dwelling in exposure pathways.
Rosina Johnson +3 more
wiley +1 more source