Results 31 to 40 of about 11,297 (118)
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 3, Page 303-310, March 2025.ABSTRACT Objective Globally, one in four pregnant women is classified as overweight or obese, based on their prepregnancy body mass index (BMI). Obese pregnant women are at increased risk of adverse pregnancy outcomes and long‐term cardiovascular disease that occurs earlier in life.
M. Charakida +6 more
wiley +1 more source
Dianci bileiqi, 1997 采用金相测定球墨面积率的方法，探讨了瓷质气孔形状与机械强度的对应关系。根据测试结果得出气孔形状、大小、含量直接影响着瓷的机械强度的结论，并通过对气孔形状、大小、含量的测试，可以大致估计出该瓷质的无釉试条压缩强度。
李心虹, 徐宝春
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Wildlife Letters, Volume 3, Issue 1, Page 22-29, March 2025.Human–wildlife conflict poses a major threat to conservation and livelihoods. Here, we outline two innovative approaches: one where local people monitor wildlife on their land using camera‐traps and receive tangible, significant benefits as a direct result of that recorded wildlife presence, and one where that approach is expanded into wider ...
Amy Dickman +8 more
wiley +1 more source
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Trade restrictions are often advocated and implemented as measures to protect wild species threatened by overexploitation. However, in some instances, their efficacy has been questioned, notably by governments in the southern African (SADC) region, which tend to favor a sustainable use approach to wildlife management. We conducted a systematic
Christina Hiller +1 more
wiley +1 more source
Dianci bileiqi, 2018 基于L-D（Liew and Darveniza）提出的土壤非线性击穿效应模型,根据电磁场理论开发了一套三维时域有限差分（3-D FDTD）算法,建立了垂直接地体仿真模型,利用该模型于时域内从电场强度,电导率分布,最大暂态地电位升和暂态冲击阻抗的角度来研究了不同接地体长度和不同电流幅值对垂直接地体冲击散流特性的影响,于频域内从电场强度和电导率分布的角度来研究了垂直接地体在不同正弦电流频率中的散流特性。研究表明:1)接地体长度越长,土壤横向击穿区域越小,纵向击穿区域越大,最大暂态地电位升越小 ...
陶玉郎 +6 more
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Engaging youth in biodiversity education through visual narrative
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Engaging youth in early and sustained conservation education has important implications for promoting positive attitudes and behaviors in those who will become the future of conservation and management. Toward this goal, visual narratives (comic books, graphic novels) are an increasingly popular method used by conservation scientists to ...
Kyra Ricci +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2014 高强度螺栓连接分为摩擦型和承压型两类,是依照受剪螺栓连接的两种不同极限状态划分的。《钢结构设计规范》(GB 50017—2003)(简称03规范)不恰当地把受拉螺栓连接也纳入这两种分类,造成混乱。对此进行讨论,并提出改变分类的建议。受拉螺栓连接中螺栓通常要承受撬力。03规范不直接计算撬力,而是采用降低螺栓抗拉承载力设计值的方法,计算不够精确。《钢结构高强度螺栓连接技术规程》(JGJ 82-2011)虽然给出撬力计算方法,但存在值得商榷之处。在分析的基础上推出撬力的简化计算公式,并提出梁 ...
陈绍蕃
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智能科学与技术学报, 2021 磁共振（MR）是一种被广泛使用的医学成像方式。针对某些序列的 MR 影像不易直接获得、需要由其他序列的MR影像转换的问题，提出一种基于细节增强的MR序列转换方法。该方法基于条件生成对抗网络构建了残差模板合成模块 ResGAN和细节增强合成模块 EnGAN，设计了一种端到端的网络结构。在一组配准过的神经纤维瘤T1序列影像和STIR序列影像上进行了测试，结果表明，相比于现有方法，提出的方法更好地还原了边界细节和信号强度细节。
严凡, 邸奕宁, 张建伟, 陈为
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Community perceptions of invasive species and environmental management in a US island territory
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Environmental managers struggle with communicating accurate and relevant information and with gaining trust from the communities they serve, problems that are especially pronounced in minority and colonized communities. An important step in developing successful management strategies is partnering directly with the communities involved, but ...
Ann Marie Gawel +2 more
wiley +1 more source
Guangtongxin yanjiu, 2016 为了控制自由空间光通信系统的成本、体积和功耗,便于系统的维护与运行,针对现有的自由空间光通信系统一般采用强度调制/直接解调的方式,提出了一种新型的基于K平均算法的接收机结构,并从执行复杂度、鲁棒性和差错性能等方面与经典算法进行比较分析。结果显示,当数据块长度达到1 000时,所提算法性能可以逼近理想接收机性能。
王强, 李笑歌
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