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1.
对固体铝电解电容器结构性能特点、技术水平、市场现状和未来发展前景进行了概述,提出了我国固体铝电解电容器技术开发的紧迫性和必要性。  相似文献   

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电容器作为电器设备的重要电子元件,在日常电器中应用非常广泛,在电器设备中主要负责信息的传递以及能量的储存,下文详细说明电容器的作用、特点以及电容器的表征指标,阐述了金属化膜电容器的内外界影响因素,提高了金属化薄膜电容器质量的具体方法。  相似文献   

3.
介绍了采用水蒸汽下热分解硝酸锰的方法制取固体钽电容器致密MnO_2阴极层的工艺特点和MnO_2层的特征,以及用此法得到的固体钽电容器的性能。用正交设计研究了电容器工艺条件对电容器性能的影响并建立了相应的数学模型。  相似文献   

4.
欧阳军 《铝镁通讯》2003,(2):47-48,42
简要介绍了并联电容器的用途、结构和原理,着重阐速了并联电容器的常见故障,以及所采取的措施和方法.  相似文献   

5.
介绍了自愈式电容器的原理及技术特点、自愈式电容器在安钢西区110kV变电站的应用情况。并阐述了其保护、补偿效益和操作注意事项。  相似文献   

6.
本文介绍了用五氧化二铌制造CT_4低频独石陶瓷电容器的电性能、阐明了独石陶瓷电容器具有小型化、实用化的特点。  相似文献   

7.
邱向东  汪丽都 《稀有金属》1996,20(6):444-450
对90年代世界电容器级钽粉生产与使用中围绕钽电容器片型化、钽粉超高比容化形成的发展特点及变化趋势作了初步探讨  相似文献   

8.
结合对钽、铌电解电容器性能特点的介绍,综述了近年来国内外钽、铌电解电容器研究、生产方面的进展以及市场动态。  相似文献   

9.
钽、铌电解电容器工艺研究进展   总被引:2,自引:1,他引:1  
结合对钽、铌电解电容器性性能特点的介绍,综述了近年来国内外钽、铌电解电容器研究、生产方面的进展以及市场动态。  相似文献   

10.
石墨烯具有特殊的二维碳原子结构,因此具有比表面积大、电导率高等特点,在超级电容器中可作为电极材料。本文主要综述了石墨烯超级电容器研究进展,包括超级电容器的原理、石墨烯的制备技术、石墨烯电极材料及复合、石墨烯超级电容器的生产及应用等。结合石墨烯的研发及产业化进展和现阶段新能源产业的发展和背景,阐述了石墨烯超级电容器有望成为石墨烯最具突破性的应用。  相似文献   

11.
转炉炉壳热应力分析   总被引:5,自引:1,他引:4  
任学平  郭志强  邹家祥 《炼钢》2001,17(6):47-49
根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。  相似文献   

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通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。  相似文献   

14.
Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.  相似文献   

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Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

17.
The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.  相似文献   

18.
Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.  相似文献   

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