Dianci bileiqi, 1973 电力系统配电装置位于强烈雷电活动地区。以雷日和雷时表示的雷电强度列于表1。考虑强的雷电活动,所有的逐年增多的电力系统配电装置都用阀式避雷器来防护架空线路的大气过电压波。避雷器数量,正如图1所示,亦是逐年在增长。220、110和35仟伏避雷器通常装于变电站母线上和电力变压器与断路器之间。它们的动作数据如下:
汪仁根
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Dianci bileiqi, 1995 超高压直流线路中玻璃和瓷绝缘子意外事故分析详细列出１９７０～１９９２年间玻璃和瓷绝缘子在２５０ｋＶ、４５０ｋＶ、１５００ｋＶ直流线路中的运行数据。专门的实验结果说明了破坏机理，并测定了串中每一部件的电阻。讨论了污秽和腐蚀情况下绝缘子的击穿及其热电压图...
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Gaoya dianqi, 1973 PK型断路器是一种空气断路器。自132千伏至765千伏已形成完整的系列,并分别在美国电力网、加拿大魁北克电站投入运行。 断路器的基本部件是一个“开断单元”。它由主断口灭弧室与辅助断口灭孤室组成,是担负分、合输电线路的主要部分。目前,世界各国大多采用若干个“开断单元”串联以实现超高压输电。“开断单元”的主,辅灭孤室的剖视图见图1所示。
彭光军, 王力法
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Zhongguo cuzhong zazhi目的 探讨急性缺血性卒中（acute ischemic stroke，AIS）患者就医决策延迟的重要危险因素，构建列线图预测模型，为早期识别就医决策延迟高风险患者提供个体化评估工具。 方法 前瞻性纳入2024年9月—2025年4月深圳市3家医院的AIS患者，根据其症状出现或被识别至首次决定寻求医疗帮助的时间间隔分为延迟组（＞1 h）与未延迟组（≤1 h）。采用多因素logistic回归分析识别就医决策延迟的独立影响因素，并构建列线图预测模型。通过ROC曲线、Hosmer-Lemeshow拟合优度检验、
班悦，胡敏莉，李芝慧，邓丽萍，谢小华BAN Yue, HU Minli, LI Zhihui, DENG Liping, XIE Xiaohua
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[Establishment of a predictive nomogram model for predicting the death of very preterm infants during hospitalization]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2022 Jue ZZ +5 more
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Integrated single-cell and transcriptome sequencing to construct a prognostic model of M2 macrophage-related genes in prostate cancer [PDF]
ObjectiveTo explore the prognostic value of M2 macrophage-related genes in prostate cancer (PCa), aiming to predict tumor prognosis more accurately and enable personalized treatment.Methods·RNA sequencing (RNA-seq) data of PCa were downloaded from The ...
FENG Chengling, HAN Bangmin, TANG Kairan
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Construction of web-based prediction nomogram models for cancer-specific survival in patients at stage IV of hepatocellular carcinoma depending on SEER database. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Zhan G, Cao P, Peng H.
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Evaluation of machine learning prediction of altered inflammatory metabolic state after neoadjuvant therapy for breast cancer [PDF]
Objective·To develop a machine learning approach for early identification of metabolic syndromes associated with inflammatory metabolic state changes in breast cancer patients after neoadjuvant therapy, using common laboratory and transthoracic ...
CHAI Yezi +7 more
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Establishment of a prediction model for major adverse cardiovascular and cerebrovascular events in prehypertensive patients [PDF]
Objective To explore the predictive efficacy of logistic regression model based on carotid artery elastic ultrasound parameters for the occurrence of major adverse cardiovascular and cerebrovascular events（MACCE ）in patients with prehypertension ...
HE Zhi,an，LAI Jiangqiong，ZHENG Tao
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[Establishment of a nomogram model for predicting necrotizing enterocolitis in very preterm infants]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2022 Liu X, Liu LJ, Jiang HY, Zhao CL, He HY.
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