Results 41 to 50 of about 181,676 (138)
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 256-269, August 2026.ABSTRACT Objectives The primary aims of this study were to validate externally the diagnostic performance of the Assessment of Different NEoplasias in the adneXa (ADNEX) model for distinguishing between malignant and benign adnexal masses, when used by non‐expert ultrasound examiners in general gynecological settings with a low prevalence of ovarian ...
I. M. Dueholm Hjorth +11 more
wiley +1 more source
Dianci bileiqi, 2011 金属氧化物避雷器比例单元与整只避雷器具有热等价性是动作负载试验和工频电压耐受时间特性试验可行和可信的关键,初步计算运行最大理论温升△Tzmax是检查瓷外套多元件金属氧化物避雷器是否进行热应力的人工污秽试验的前提,而验证热等价性和计算△Tzmax均需将试品加热到120℃。通过对标准内容及试验实例的分析和研究,指出了验证热等价性试验和人工污秽试验的预加热试验的异同点以及进行这两项试验时应注意的几个问题,给出了一些具有参考价值的试验数据和时间温度曲线。
桑建平
doaj
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source
, 2012 采用10°尖锥高超声速动态试验标模在JF-8A高超声速脉冲风洞中开展了轻模型悬线自由飞实验。采用高速摄像机记录模型的飞行姿态，由于模型的成功设计和制作，在28ms 的风洞准定常工作时间内得到了三个周期以上的角运动。采用最大似然法辨识得到了该模型的俯仰阻尼系数，其值与相近实验条件下从国内外其它设备所得结果相一致，从而验证了实验结果的可靠性，同时也表明了所发展的实验方法和测试系统切实可行 ...
苑朝凯 +3 more
core +2 more sources
±800 kV/6250 A换流阀MVU试验中模拟负载匹配性研究
Gaoya dianqi, 2017 为确保研制的±800 kV/6250 A换流阀绝缘试验的顺利进行,笔者对基于±800 kV/5000 A和±1100 kV/5 000 A大组件换流阀研制的模拟负载在±800 kV/6250 A小组件换流阀MVU绝缘试验中的可用性进行了研究;根据IEC 60700-1—2015标准,对换流阀在直流耐压试验、操作冲击电压试验和雷电冲击电压试验3项试验中呈现出的不同特性,从数值计算和建模仿真2个方面进行了研究,通过±800 kV/5000 A小组件换流阀MVU试验数据对所用方法和仿真模型进行验证 ...
马元社 +6 more
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Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19
Policy Studies Journal, Volume 54, Issue 3, August 2026.Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source
Methods in Ecology and Evolution, Volume 17, Issue 7, Page 2123-2134, July 2026.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
wiley +1 more source
, 2009 FlexRay是一种用于汽车的高速可确定性的，具备故障容错的总线系统，作下一代汽车网络协议，提供了充足的带宽、可靠性和实时响应能力，以实现线控应用，如节流阀、制动、转向和动态稳定性控制。该标准已经被越来越多的汽车制造商采用。目前国内尚未成功开发出相关产品，因此研究开发具有自主知识产权的IP具有十分重要的意义。随着芯片复杂度的快速增长，验证成为SoC开发过程中面临的最有挑战性的一个环节。验证要占整个设计开发60%-80%的工作量。对于千万门级的SoC，充分、全面的验证尤为复杂，需要耗费大量的人力以及时间 ...
林健
core
Gaoya dianqi, 2012 随着智能电网建设的快速发展,智能开关设备应用越来越广泛,其可靠性更加受到各方关注。为了对智能化GIS设备智能采集单元的可靠性进行试验验证,笔者通过隔离开关开合母线充电电流方式1以及方式3试验对其进行了相关研究。通过一例363 kV智能GIS在隔离开关开合母线充电电流方式1、方式3试验中TEV的测量分析,介绍试验回路及试验过程,并对测量得到的TEV数据进行了分析,通过试验数据总结了在此例试验中TEV电压的分布情况,并对产生此测量结果的原因进行了分析 ...
贾涛 +4 more
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