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在我国煤矿企业矿井建设不断发展的大背景下,煤矿的生产机械化水平以及各类机电装备的自动化程度也取得了大幅度的提升,在井下胶带输送机中,比较典型的就是钢丝绳芯带式输送机。与此同时,在许多煤矿企业,钢丝绳芯高强度带式输送机的应用非常广泛,所以,高强度带式输送机的启动特性引起了煤矿企业以及许多专家和学者的重视,启动特性的好坏,会使钢丝绳芯高强胶带的强度等级和使用寿命受到直接的影响。而CST(可控传输系统)具备非常良好的启动特性,有利于节约煤矿企业的成本,有利于节省煤矿企业后期的维护费用,有利于延长设备的使用寿命,但是,在实际应用的过程中,故障的发生也是不可避免的。基于此,本文探索了CST在井下胶带输送机中的应用与故障处理。 相似文献
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应用BPJA-1200/6K防爆高压变频器设计了煤矿井下带式输送机变频调速系统介绍了BIgA-1200/6K矿用防爆兼本质安全型高压变频器的组成结构以及应用该变频器构成的皮带机调速控制系统,叙述了调速控制方案及系统功能,应用结果表明该变频调速系统适用于井下大功率高压设备的变频调速、 相似文献
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运10研制的历程充分说明,运10飞机设计的主要技术亮点、运10飞机的许多关键性突破,都是在马凤山总设计师的主持下决策实现的,叫做请马总“拍板”。在当时,拍扳不仅是做一个技术决策,而且是承担了政治责任和技术风险。即使多半处在“文化大革命”这个特珠的历史时期,运10飞机的研制,从前期论证到试飞上天,仍然前后不到10年时间.这在我国航空工业史上是比较快的。 相似文献
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苏鲁两省历来存在水利纠纷。民国初年,为了应付山东方面不断增强的治水压力和借款合治计划,苏北沿运之地方士绅运作特派江苏运河督办。由于张謇的影响力,地方士绅推举其为督办。但双方在治运策略上存在分歧,张謇主张导淮,而地方士绅主张治运以为治标之策。与此同时,北京政府出于平衡苏皖关系的考虑,不愿将导淮交由张謇督办。新治运机构的组建一度陷入停滞。有鉴于此,地方士绅提出“先规沂运”的设想并获得张謇认可,北京政府因财政紧张最终裁决先从治运入手。在地方士绅的推动下,督办江苏运河工程总局于1920年4月1日正式成立。 相似文献
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煤矿刮板输送机在生产实践中经常出现掉道、卡链事故,经过对事故原因进行详细分析,对煤矿井下工作面及顺槽刮板输送机事故多发的研究,笔者提出了一些粗浅的看法和处理方案。从理论和实践两方面进行了研究分析,对减少此类事故具有一定性的推广价值。 相似文献
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《Journal of Media Economics》2013,26(3):169-187
This article sheds light on the adaptive strategies of global media companies that have recently entered India, with special emphasis on their collaborative alliances with local companies. The evidence points to the tendency for collaborative alliances to serve as conveyor belts for the one-way transmission inwards of global industrial practices and structures. This article suggests that Indian television has begun its journey down the path leading toward its integration into the global television system. 相似文献
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Marilyn S. Estes 《期刊图书馆员》2013,64(2):267-274
In recent years book publishers have begun a gradual trend towards providing academic libraries with USB flash drives as content bearers of their products and services. This article reviews the current uses of the USB flash drive in academic libraries as well as the updates and changes to the USB flash drive. These updates and changes to the USB flash drive make it more appealing as the conveyor of the digital book; therefore giving librarians' flashbacks of old issues associated with a new trend. 相似文献
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Communication openness,satisfaction, and length of employment in Japanese organizations 总被引:1,自引:0,他引:1
Hiroko Koike William B. Gudykunst Lea P. Stewart Stella Ting‐Toomey Tsukasa Nishida 《Communication Research Reports》2013,30(2):97-102
Hypotheses were generated regarding the relationship among communication openness, satisfaction, and length of employment in Japanese organizations. A questionnaire was administered to employees of Japanese organizations in the Tokyo area. The data revealed that upward, downward, and lateral communication openness were associated positively with both relational and organizational satisfaction. Length of employment also was associated with downward and lateral communication openness and with both relational and organizational satisfaction. The relationships between length of employment and satisfaction differed for employees in large and small‐to‐moderate sized organizations. Lateral communication openness was associated positively with satisfaction variables and there was a relatively small association between length of employment and satisfaction. 相似文献
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H. J. Ayres Vera R. Brand Donald F. Faules 《Journal of Applied Communication Research》2013,41(2):75-90
An urban hospital is the scene for studying the formal communication in nursing teams. Conclusions are drawn concerning upward and downward communication flow. 相似文献
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Francis L. F. Lee 《Mass Communication and Society》2013,16(1):87-110
This study ties the third-person effect phenomenon to social comparison research by positing that a downward comparison is made when people regard “others” as more influenced than themselves by persuasive messages. A likely consequence of the downward comparison is prevention behavior, which refers to the attempt to avoid undesirable outcomes. Hence we can expect a negative relationship between perceived influence of messages on others and actual influence of the messages on self. This negative relationship should be particularly likely to exist among less efficacious individuals. Utilizing a survey experiment (N = 800), which examined both the perceived and actual influence of opinion poll findings on people's issue opinions, this study shows that the prevention effect does not exist across the board, but there is enough evidence showing its existence among less efficacious people on certain issues. 相似文献
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[目的/意义] 调查和分析"一带一路"专题数据库建设情况,为构建"一带一路"多语种、共享型数据库提供借鉴。[方法/过程] 通过文献和网络调研法,选择30余种数据库作为分析对象,从资源组织体系、资源类型和内容、数据库建设方式以及多语言处理问题等维度进行系统分析,指出数据库建设具有资源组织方式不一、资源类型和内容多样、合作建设方式不同、页面语言较为单一的特点。[结果/结论] 针对数据库建设存在的问题,提出采用多维度资源组织方式,注重资源内容的深度加工,加强国内外合作机制研究,及重视小语种资源采集和跨语种检索研究等方面启发性建议,为"一带一路"专题库建设提供参考。 相似文献
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本文对2010年188起中国网络门事件进行系统分析发现:网络门事件的发生率在3月达到顶峰后呈波浪状下降趋势;发生重心将逐渐向中西部地区迁移;所涉对象在平民化与大众化的同时,也在女性化与年轻化;所涉内容上最突出的问题是性爱与色情问题;传播方式上,他人传播是最主要的传播方式;传播效应上,平均放大效应是24万倍,越往中西部地区网络放大效应越大。文章通过揭示门事件的传播特征与规律,力图为社会及政府的引导提供有效参考。 相似文献
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随着科学技术的发展, 汽车主动安全技术在交通安全中起着越来越大的作用。但尽管如此, 仍然不可避免地发生意外情况, 此时, 汽车的被动安全技术将是避免乘员受伤的唯一保障。汽车的被动安全技术主要包括安全带、安全气囊、安全转向柱及安全座椅等几个方面。 相似文献
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