Results 81 to 90 of about 1,226,577 (254)
Zhongguo shiyan zhenduanxue, 2017 目前处于分娩期的女性和妇产科的医生们都把重心放在围生期女性盆底功能状态的研究上,尤其是怎么样才能快捷有效的对盆底功能障碍性疾病进行诊断[1]。盆底功能障碍性疾病主要包括压力性尿失禁、大便失禁、盆腔器官脱垂、性功能异常、便秘及慢性盆腔疼痛等。多种因素如肥胖、年龄、妊娠等都能导致女性盆底功能异常,其中妊娠和分娩造成的肛提肌组织破坏是最主要的因素[2]。
薛丹 +4 more
doaj
, 2004 在中国国家自然科学基金重大项目《支持产品创新的先进制造技术中的若干基础研究》子课题《面向敏捷制造的分布自治生产系统协调控制理论研究》的资助下，开展企业性能建模研究，对企业性能建模研究成果进行学术总结。 提出基于过程模型的企业性能建模方法与实施协调控制的总体思路，提出活动属性(activity attribute)和过程属性(process attribute)的概念，将与企业性能有关的参数作为属性赋予活动和过程，在活动属性的基础上，分析计算过程属性，得到企业性能(属性 ...
朱云龙 +4 more
core
Risks of concealing environmental degradation
Conservation Biology, EarlyView.Abstract Current practice seeks to conceal the visual impact of land‐use change (i.e., development). Six percent of development impact assessments in Australia and 14% of the World Bank's assessments recommend visual impact mitigation. This mitigation results in, for example, vegetated buffer strips alongside cleared agricultural areas and earthen ...
Matt W. Hayward +8 more
wiley +1 more source
Dianci bileiqi, 2022 由于复合绝缘子出现鸟啄、异常发热、酥朽断裂等运行问题，研究人员尝试采用新型脂环族环氧树脂材料代替常用的硅橡胶。为了评估脂环族环氧树脂的综合性能，通过脂环族环氧树脂和硅橡胶的憎水性、憎水迁移性、耐漏电起痕、介电常数、介电损耗、平均断裂能量等试验数据对比研究了二者的运行性能。研究结果表明相比于硅橡胶材料，脂环族环氧树脂材料同样具有优良的憎水性、憎水迁移性和介电性能，且脂环族环氧树脂的耐漏电起痕性能和缺陷扩展性能优于硅橡胶。
曾向君 +5 more
doaj
, 2017 有机太阳能电池由于轻质、柔性、低成本、可溶液加工等优点持续受到研究者的广泛关注。目前,提高器件的光电转换效率和稳定性能(寿命)仍然是有机太阳能电池的研究重点,也是目前制约其走向实际应用的关键因素。要获得高效稳定的有机太阳能电池,除了活性层材料之外,界面也将起到至关重要的作用。ZnO作为电子器件中常用的阴极界面材料,具有制备方法简单、稳定性好、光透过率高、合适的能级以及良好的电荷传输特性等特点。但是,在光伏器件中,基于溶液方法制备的ZnO界面仍存在一些问题。一方面,溶液法制备的纳米粒子ZnO表面缺陷多 ...
张文俊 +4 more
core
Changes in the transformative potential of action proposals in Finnish Red Lists from 1986 to 2019
Conservation Biology, EarlyView.Abstract Red lists provide critical knowledge regarding biodiversity decline, especially in Finland, where broad assessments have been made regularly since the 1980s. They deliver information on the threat status of species and ecosystems, propose actions to guide conservation policy, and have the potential to spur transformative change.
Anni Arponen +4 more
wiley +1 more source
Gongye shui chuli, 1996 在对三相流化床除二氧化碳器小型模拟设备（Φ100mm）进行流体力学性能和传质、传热性能研究的基础上，将其放大到用于工程的三相流化床除二氧化碳器（Φ650mm），通过试验，对其进行了流体力学性能和传质性能的研究。用数理统计的方法得出各流体力学性能和传质性能的数学模型。
董学德, 李绍箕
doaj
How identity bias affects perceptions of conservation messages on social media
Conservation Biology, EarlyView.Abstract Public support is essential for conservation, as public opinion can influence decision‐making and policy. Therefore, understanding whether bias toward conservationists due to their identity (identity bias) affects their perceived credibility and support for their recommendations is important.
Lauren F. Rudd +4 more
wiley +1 more source
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source