Results 41 to 50 of about 13,073 (198)
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang +11 more
wiley +1 more source
Gaoya dianqi, 2017 直流分压器是特高压直流输电系统中不可缺少的主设备,其采集数据的准确性对电网的安全稳定运行至关重要。基于直流分压器的工作原理,分析致使直流分压器分压比变化的主要因素,通过数学公式直观的诠释分压比的不确定性,然后在研究分压比不确定性的基础上构建直流分压器校准分析计算模型,并试验证明了该模型对站用±800 kV直流分压器的校准水平高达10-510-6量级,大幅度提升了直流分压器量值测量的准确度。
王奇 +4 more
doaj
利用TMS320C54x数字信号处理器进行JPEG算法的彩色图像压缩 [PDF]
, 2000 作为水底勘探设备的一个重要组成部分，水下彩色图像采集与传输系统主要由图像采集、图像压缩和信道编码传输三大部分组成。它必须具有小型化、高速处理的特点。而数字信号处理器（DSP），由于其独特小巧的结构和快速实现各种数字信号处理算法的突出优点，理所当然的成为了该系统核心的最佳选择。 在水下彩色图像采集与传输系统中，压缩是其中一个必不可少的环节。这是因为相比于黑白图像而言，彩色原始图像的表示需要更大量的数据。因此在进行传输之前，需要对图像信息进行数据压缩编码，以减少传输的数据量，更好地满足系统传输速率的要求 ...
王一帆
core
Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
International Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
wiley +1 more source
Virtual channel model for distributed video coding accounting for quantization noise [PDF]
, 2012 Due to the inaccuracy model on describing the virtual channel with Laplacian,the rate-distortion performance of distributed video coding is relatively low.The quantization noise will be taken into account for online modeling at the decoder.Further,the ...
Ming YIN +3 more
core
, 2010 太阳活动指数中期预报一直是空间环境业务预报的难点之一.本文在自回归方法模型的基础上,利用太阳活动区面积、位置等参数与10.7cm辐射流量之间的定量关系,根据活动区面积衰减规律,建立了一个基于活动区参数及演化规律的改进型太阳活动指数中期预报模型.通过对预报测试实例分析发现,在日面出现较大活动区导致F_（10.7）迅速增长并超过历史数据峰值的情况,在日面活动区消亡导致指数突然出现平静期的情况,新模型的预报准确性相比自回归模型有很大提高,预报的平均相对误差下降约5%～9%.由此可见 ...
温靖, 钟秋珍, 刘四清
semanticscholar +1 more source
Clip Voice: Misogyny and the Renegotiation of a Gendered Vocal Style in Chinese Digital Discourse
Journal of Sociolinguistics, Volume 29, Issue 5, Page 348-359, November 2025.ABSTRACT The participatory culture of social media allows women's voices to be heard but also parodied and policed. On Chinese social media platforms, where performers rapidly adopt and transform vocal trends for engagement, discourse on gendered vocal styles has proliferated.
Zichuan Yu, Rebecca Lurie Starr
wiley +1 more source
Fault Characteristic Study Based on FLUX 2D for Large Synchronous Generators With Stator Winding Inter-turn Short Circuits Under Rated Operating Conditions [PDF]
, 2013 该文采用单一绕组分析和有限元分析相结合的方法,研究大型同步发电机在额定运行方式下定子绕组匝间短路故障特性。该方法同样适用于确定故障条件下的电流和转矩。对于内部故障情况的电磁瞬态仿真必须考虑到一些特殊措施,如单一绕组和电网之间正确的连接对于模拟内部故障是相当关键的。以往的结果表明,在内部磁场非对称的情况下,基于等效电路的经典算法是不适用的。该文通过对汽轮发电机匝间短路故障进行系统的研究,表明:其短路电流、相电流、转矩和径向力与短路的位置及匝数紧密相关。在一些短路情况下,发电机将产生很大的局部电流 ...
J.Rosendahl +3 more
core
Intrapulse modulation recognition of signals based on statistical test of energy focusing efficiency [PDF]
, 2013 A blind intrapulse modulation recognition based on energy focusing efficiency test was proposed, which can be used to estimate the modulation type under low signal to noise ratio (SNR) conditions.
Guo-bing HU +4 more
core +1 more source
People and Nature, Volume 7, Issue 7, Page 1749-1768, July 2025.Abstract Social‐ecological systems (SES) are coupled systems formed by the intricate interactions between humans and nature. Our movement towards sustainable lifestyles requires a robust understanding of these interactions. Achieving a sustainable win‐win situation for both social and ecological systems, therefore, necessitates a sound scientific ...
Na Sa +6 more
wiley +1 more source