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12相整流 1

交直流同时供电 1

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Structural optimization of filament wound composite pipes

Roham RAFIEE; Reza SHAHZADI; Hossein SPERESP

《结构与土木工程前沿（英文）》 2022年第16卷第8期页码 1056-1069 doi: 10.1007/s11709-022-0868-3

摘要： An optimization procedure is developed for obtaining optimal structural design of filament wound composite pipes with minimum cost utilized in pressurized water and waste-water pipelines. First, the short-term and long-term design constraints dictated by international standards are identified. Then, proper computational tools are developed for predicting the structural properties of the composite pipes based on the design architecture of layers. The developed computational tools are validated by relying on experimental analysis. Then, an integrated design-optimization process is developed to minimize the price as the main objective, taking into account design requirements and manufacturing limitations as the constraints and treating lay-up sequence, fiber volume fraction, winding angle, and the number of total layers as design variables. The developed method is implemented in various case studies, and the results are presented and discussed.

关键词： composite pipes optimization experimental validation computational modeling filament winding

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Fault-tolerant control of an open-winding brushless doubly-fed wind power generator system with dual

Shi JIN, Long SHI, Sul ADEMI, Yue ZHANG, Fengge ZHANG

《能源前沿（英文）》 2023年第17卷第1期页码 149-164 doi: 10.1007/s11708-020-0711-2

摘要： To improve the fault redundancy capability for the high reliability requirement of a brushless doubly-fed generation system applied to large offshore wind farms, the control winding of a brushless doubly-fed reluctance generator is designed as an open-winding structure. Consequently, the two ends of the control winding are connected via dual three-phase converters for the emerging open-winding structure. Therefore, a novel fault-tolerant control strategy based on the direct power control scheme is brought to focus in this paper. Based on the direct power control (DPC) strategy, the post-fault voltage vector selection method is explained in detail according to the fault types of the dual converters. The fault-tolerant control strategy proposed enables the open-winding brushless doubly-fed reluctance generator (BDFRG) system to operate normally in one, two, or three switches fault of the converter, simultaneously achieving power tracking control. The presented results verify the feasibility and validity of the scheme proposed.

关键词： open-winding brushless doubly-fed reluctance generator (BDFRG) direct power control fault-tolerant control multi-level converter wind power

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交直流电力集成技术

马伟明

《中国工程科学》 2002年第4卷第12期页码 53-59

摘要：

建立了新型电机的数学模型，为解决关键技术问题提供了理论基础。查明了发电机整流系统特有的低频功率振荡的机理，得出了稳定判据及解决稳定问题的技术措施；通过合理设计，可控制直流电压的浮动范围；综合治理整流过程引起的交流谐波和直流脉动，提高了系统的EMC性能；巧妙地处理了系统的强非线性，从而得出了直流短路和交直流同时短路的冲击电流解析式；提出了根据整流装置输入、输出电压波形进行实时在线故障诊断的原理和方法。在此基础上，将定子3相绕组、12相绕组、整流装置、励磁系统、励磁调节器等集于一体，功研制出性能优良的交直流发电机，能同时提供高品质交直流电源，为独立电力系统的集成化奠定了基础。

关键词：电力集成双绕组交直流发电机 12相整流交直流同时供电独立电力系统

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中国开创的抗爆钢复合材料压力容器技术

朱国辉

《中国工程科学》 2000年第2卷第6期页码 8-11

摘要：

压力容器是一种应用广泛的重要工程装置。大型压力贮罐、氨合成塔、尿素合成塔、石油加氢反应器、导弹壳体和液氢、液氧燃料压力容器，以及核堆压力壳等是国际上公认的高科技重大承压装备。纤维复合材料和普通钢制是当今世界压力容器技术的两大种类。作者开创了一种新的具有优良综合特性，已含国家发明奖励和18项中美专利成果的抗爆钢复合材料压力容器技术，使压力容器的使用安全性和制造经济性发生了极大的变革；其典型代表钢带缠绕式压力容器，已被美国机械工程师学会正式列入ASME标准，居国际领先水平，将为21世纪国际压力容器的设计、制造和安全保障技术的发展开创出新的局面。

关键词：压力容器技术纤维复合材料钢复合材料复合薄内筒交错缠绕全双层结构抑爆抗爆

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is essential for the integrity of stereociliary rootlet in cochlear hair cells in mice

Yuqin Men, Xiujuan Li, Hailong Tu, Aizhen Zhang, Xiaolong Fu, Zhishuo Wang, Yecheng Jin, Congzhe Hou, Tingting Zhang, Sen Zhang, Yichen Zhou, Boqin Li, Jianfeng Li, Xiaoyang Sun, Haibo Wang, Jiangang Gao

《医学前沿（英文）》 2019年第13卷第6期页码 690-704 doi: 10.1007/s11684-018-0638-8

摘要： encodes the taperin protein, which is concentrated in the tapered region of hair cell stereocilia in the inner ear. In humans, mutations cause autosomal recessive nonsyndromic deafness (DFNB79) by an unknown mechanism. To determine the role of in hearing, we generated -null mice by clustered regularly interspaced short palindromic repeat/Cas9 genome-editing technology from a CBA/CaJ background. We observed significant hearing loss and progressive degeneration of stereocilia in the outer hair cells of -null mice starting from postnatal day 30. Transmission electron microscopy images of stereociliary bundles in the mutant mice showed some stereociliary rootlets with curved shafts. The central cores of the stereociliary rootlets possessed hollow structures with surrounding loose peripheral dense rings. Radixin, a protein expressed at stereocilia tapering, was abnormally dispersed along the stereocilia shafts in null mice. The expression levels of radixin and -actin significantly decreased. We propose that is critical to the retention of the integrity of the stereociliary rootlet. Loss of in -null mice caused the disruption of the stereociliary rootlet, which resulted in damage to stereociliary bundles and hearing impairments. The generated -null mice are ideal models of human hereditary deafness DFNB79.

关键词： TPRN stereocilia stereociliary rootlet actin filament CRISPR/Cas9 hearing