Results 21 to 30 of about 803,141 (171)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To overcome the strength–ductility trade‐off in fabricated Ti‐2Al‐2.5Zr alloy tubes, we systematically investigated the microstructural evolution and mechanical behavior throughout thermomechanical processing, including hot working (forging and extrusion) and cold multi‐pass rolling.
Yanlong Xia +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Achieving a simultaneous enhancement in both tribological and mechanical properties of self‐lubricating composites has long been a challenge. In this study, we designed the composition based on first‐principles calculation and fabricated a copper‐based self‐lubricating composite with excellent tribological and mechanical properties via spark ...
Zhongbo Wang +4 more
wiley +1 more source
, 2005 高三同学面对决定人生命运的高考,一定承受很大的压力!这是很自然的事.不过,要知道,要想学习好,要想提高学习效率,要想激发人体潜在的心理能量,就必须有适当的压力.有压力才有动力.但是,我们说的减压指的是有些同学承受的压力过大,不仅没起到动力的作用,反而成为过大的心理负担,影响了人的智力因素的发挥,影响了人的生物节律,影响了学习效率的提高.所以,我们说,对压力过大的同学要进行减压,把潜在的心理能量发挥出来,提高学习效率,提高学习成绩.
王极盛
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 806-814, June 2026.ABSTRACT Objective To investigate the incidence of pre‐eclampsia (PE) and the predictive performance of the Fetal Medicine Foundation (FMF) first‐trimester PE screening algorithm across pregnancies conceived using assisted reproductive technology (ART), after ovulation induction (OI) and through spontaneous conception (SC).
A. S. L. Kjaer +23 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Managing diabetic wounds requires simultaneously addressing their infectious, oxidative, and regenerative impairments. To address this, this study integrates a piezoelectric BiOCl@CuSe heterojunction (PFM‐verified) into an injectable F127/HA hydrogel, creating an ultrasound‐responsive smart dressing.
Jiayan Guo +5 more
wiley +1 more source
Gaoya dianqi, 2017 为了提高特高压电容式电压互感器的瞬态性能,分析其在较宽频域内的分压特性,以某公司生产的1 000 kV特高压电容分压器为实验对象,进行了特高压电容分压器阻抗的测量,建立了特高压电容分压器的宽频等效电路模型。首先,测量特高压电容分压器的阻抗;其次,基于测量得到的数据结合矢量匹配法和电路综合理论,建立了特高压电容分压器的宽频等效电路模型,并利用模式搜索算法对等效电路进行无源修正;最后,利用所建立的模型,分析特高压电容分压器在不同频率下的分压特性,为合理设置均压装置以及改善特高压的制造工艺提供理论依据。
王平, 张广勇, 李慧奇, 李璿
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Gaoya dianqi, 2020 作为特高压交流变电站内的主要噪声源之一,运行中的特高压变压器的本体噪声、冷却装置噪声及环境噪声等相互混叠,给准确分析特高压变压器的噪声特性带来不利影响。文中依据某1 000 kV交流变电站特高压变压器的噪声测试结果,通过设计阻带滤波器和合理选取稀疏自动编码器的关键参数如隐层节点数、稀疏参数等,提出了一种综合阻带滤波器和稀疏自动编码器的特高压变压器本体噪声提取方法,对比分析了特高压变压器噪声信号分离前后的频谱瀑布图。结果表明:特高压变压器的本体噪声主要集中在100、200、300 Hz分量 ...
田昊洋 +5 more
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Zhongguo shiyan zhenduanxue, 2023 目的 探讨肾移植患者发生全麻苏醒期高血压危象的影响因素。方法 回顾性分析2019年9月—2021年9月期间吉林大学第一医院进行的98例急诊同种异体肾移植手术的临床资料。根据麻醉苏醒期的血压分为高血压危象组(49例)和血压稳定组(49例),对比两组的临床资料并分析肾移植患者发生全麻苏醒期高血压危象的影响因素。结果 高血压危象组与血压稳定组相比，前者平均年龄较大、BMI值较高、受体存在原发性高血压的比例较大、高血压脑出血供肾的比例较大、T1和T2时的收缩压较高 ...
段文燕 +3 more
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