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分析了20 t桥式抓斗起重吊车常见故障及原因,采取了相应的解决措施,从根本上杜绝了吊车的常见故障、节约了备件、降低了生产成本、减轻了维修人员劳动强度及提高了企业的经济效益. 相似文献
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介绍了Access数据库的特点和优点,在采购管理中应用的意义.使用Access编写了<供应仓储管理系统>,论述了该系统的设计思想、程序结构及应用效果.该系统的应用,减轻了工作人员劳动强度、提高了工作效率、确保了物资及时供应、减少了资金的占压. 相似文献
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济钢中厚板厂3500线粗轧机改造主传动系统采用ACS6000SD变频驱动系统,系统的整流侧和逆变侧采用了对称结构,降低了维护难度;采用了IGCT技术,保证了系统的性能响应;使用了DTC技术,提高了系统的鲁棒性。这种交直交系统做到了对电网的最少谐波运行,既减少了对电网的污染,又省去了无功补偿系统的投资。 相似文献
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2012年1月9日,"智能巡点检仪开发与应用"项目通过了由首钢总公司组织的验收评估。该项目研发的设备智能巡点检仪使用可靠、运行稳定,各项功能和技术指标均达到设计要求,实现了与四级信息化系统的紧密集成和数据共享,提高了数据准确性和人力资源效率;优化了业务流程、加快了信息传递、深化了资源共享,有效减少了设备故障停机时间,提高了设备技术管理水平。 相似文献
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概要介绍了樟东坑矿区的主要地质特征,在前人工作的基础上,对矿床的基本特征(尤其是矿脉的变化特征)进行了分析、探讨和总结;利用这些特性及其变化规律,采用一些新的探矿方法不但找到了一些隐伏盲矿,增加了地质储量,延长了矿山的服务年限,而且降低了探矿费用,减少了采矿的盲目性,节约了成本,增加了经济效益。 相似文献
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通过对钛及钛合金标准中规定残余伸长应力表述的分析和探讨,从标准几次修订描述过程来探讨目前国家标准和国家军用标准中对规定残余伸长应力测试存在的问题,并对今后标准再次修订中的修改提出建议。 相似文献
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LR Kaiser 《Canadian Metallurgical Quarterly》1997,9(4):383-390
It can be safely stated that currently there exists no standard therapy for malignant mesothelioma. The "standard" methods of chemotherapy, radiation therapy, and surgery have all been used with little improvement in overall survival. Trimodality therapy that involves a combination of all three standard treatment modalities has been shown to improve survival in selected patients. New and innovative treatment strategies clearly are needed for a disease which, because of the disappointment with standard therapy, is most commonly approached with only palliative intent. The location of this malignancy and its tendency to remain localized make it an ideal target for intracavitary approaches using photodynamic therapy, targeted cytokines, and gene therapy. Strategies using modulation of the immune system in an attempt to elicit a specific response to the tumor have been combined with chemotherapy to optimize response. Lessons learned from treating this localized malignancy with novel therapies may have much broader implications for other tumors in which systemic disease predominates. 相似文献
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Rareearthionsposessomespecialfunctionsinbiologicalbody.Aminoacidsarethestructureunitofproteins.Imidazoleisheteroclycliccomp... 相似文献
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A. V. Sukhov A. S. Razumov Yu. A. Bazanov S. L. Shitkin A. S. Grinshpon A. A. Yandimirov 《Metallurgist》2007,51(11-12):670-676
Results obtained from extensometric and x-ray diffraction studies have shown that standard railcar wheels with a plane-conical web have a high concentration of stresses in the rim region under normal service loads. Fatigue cracks were found to be formed and grow within this region. Wheels with a curvilinear web have advantages over the standard wheels in terms of their stress state. On the average, the total stresses in them are 1.5 times smaller than in standard wheels. As a result, S-shaped wheels have greater fatigue strength and can withstand tests at loads above 100 ton-f without forming cracks. Based on the findings from laboratory and field tests, the new wheels have been certified and recommended for use on new-generation railcars with axial loads of 25 ton-f. 相似文献