Results 11 to 20 of about 573,855 (154)
Ultrasound in Obstetrics &Gynecology, Volume 60, Issue 3, Page 381-389, September 2022., 2022 ABSTRACT Objective To evaluate the performance of third‐trimester ultrasound for the diagnosis of clinically significant placenta accreta spectrum disorder (PAS) in women with low‐lying placenta or placenta previa. Methods This was a prospective multicenter study of pregnant women aged ≥ 18 years who were diagnosed with low‐lying placenta (< 20 mm from
N. Fratelli +42 more
wiley +1 more source
Review of Policy Research, Volume 39, Issue 3, Page 353-378, May 2022., 2022 Abstract How can agencies that have operational activities as a primary focus improve the procurement and transition of innovative technologies, particularly from the private sector? This study seeks to inform scholars and public‐sector managers about organizational design for innovation and technology acceleration using a systems approach. It examines
Patrick S. Roberts, Jon Schmid
wiley +1 more source
Computational Intelligence and Neuroscience, Volume 2022, Issue 1, 2022., 2022 Accidents of various types in the construction of hydropower engineering projects occur frequently, which leads to significant numbers of casualties and economic losses. Identifying and eliminating near misses are a significant means of preventing accidents.
Shu Chen +4 more
wiley +1 more source
Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Evidence-Based Complementary and Alternative Medicine, Volume 2012, Issue 1, 2012., 2012 Traditional Chinese Medicine (TCM) has many unique features. Thequality‐of‐life (QoL) instrument for lung cancer based on Traditional Chinese Medicine (QLASTCM‐Lu) was the first self‐reported instrument specifically developed to assess the quality of life from the perspective of TCM.
Chonghua Wan +7 more
wiley +1 more source
Gaoya dianqi, 2023 为有效解决临近高压线工程车辆升高、转运等施工作业时碰线问题，设计了一种基于多线激光雷达的临近高压线作业安全距离预警系统。利用安装于吊车顶端的激光雷达，测量吊线及高压线缆的点云坐标，使用DBSCAN聚类算法、最小二乘法和坐标变换等手段，建立吊车吊线与高压线缆的空间模型，计算最小净空距离与安全预警值比较，实现预警。系统硬件包含主控制装置、激光雷达测距装置和报警装置，利用激光雷达可实现广角空间障碍点阵测量的能力，实现空间范围、无瞄准的距离监测。测试结果表明，临近高压线缆时，在设置的报警距离内，均能有效报警 ...
彭红刚, 刘云勋, 周继勇
doaj
Influence of microclimate and forest management on bat species faced with global change
Conservation Biology, Volume 38, Issue 4, August 2024.Abstract Climate refugia, areas where climate is expected to remain relatively stable, can offer a near‐term safe haven for species sensitive to warming temperatures and drought. Understanding the influence of temperature, moisture, and disturbance on sensitive species is critical during this time of rapid climate change.
Chelsea L. Andreozzi +3 more
wiley +1 more source
, 2021 本发明公开了一种多星分离安全距离参数优化方法，以Adams软件为初始分离段分析工具，将各分离体真实外形下的质量特性、分离弹簧力、后效推力等输入参数的偏差工况，利用目标函数组合计算姿态干扰和两体最小间隙的单偏差叠加和偏差工况，以获取姿态偏差和易碰点组合，将Adams软件计算中获取的姿态偏差和易碰点组合作为六自由度运动学计算程序的输入参数，利用输入参数的偏差数据的概率分布建立随机数，开展随机打靶仿真计算，获取概率分布条件下的近场分离姿态偏差分布和星‑星、星‑箭安全距离分布 ...
朱永泉 +4 more
core
Gaoya dianqi, 2008 500 kV紧凑型线路带电作业的难点是确定最小安全距离。为了解决这个问题,对GB/T 19185-2003《交流线路带电作业安全距离计算方法》进行了研究,同时根据某具体线路的实际情况,通过计算和试验相结合的方式,用实际带电作业危险率来判断带电作业安全性,由危险率小于1×10-5的要求得出带电作业最小安全距离,校核出该500 kV紧凑型线路直线塔最小相地距离和相间距离分别为2.6 m和4.5 m,转角塔和终端塔最小相地距离和相间距离分别为2.7 m和4.5 m ...
李超 +7 more
doaj
Gaoya dianqi, 2017 中国相关规程标准中尚未对±200 kV电压等级直流换流站设备不停电时的安全距离做出说明,如果按照高一档电压等级±500 kV安全距离来选取±200 kV电压等级的安全距离,存在安全裕度明显偏大的现象。通过对±200 kV换流站5种典型电极对其它设施（接地）间隙进行正极性标准操作冲击试验,借鉴带电作业相关研究成果,计算得到±200 kV换流站内典型电极的最小安全距离和危险率,同时结合人体在换流站内的活动范围,确定了±200 kV换流站典型不同的设备不停电时的最小安全距离为2.8 m。研究结果可为±200 ...
邓慰 +4 more
doaj