ANSYS在索道线路计算分析中的应用

本文采用ANSYS有限元计算软件对某架空索道线路的钢丝绳在各受力状态下拉力和挠度结果进行计算,并与理论计算结果对比分析。对索道支架进行分析计算,并提出了设计建议,为同类型工程提供参考。     

索道线路单筒支架的有限元分析

使用有限元分析软件ANSYS,通过合理简化,建立了某索道线路单筒支架的三维有限元模型;对其在各种载荷作用下的应力强度进行计算;根据分析设计标准,进行应力评定,对类似索道支架的设计和计算有一定借鉴和参考价值。     

基于Inventor的往复式索道客车优化设计

分析往复式索道客车在运行中出现的运行不平稳、与线路设备产生干涉等问题,指出设计方法的局限是引起故障的重要原因。利用Inventor软件进行优化设计,可以对重要零件进行应力分析和刚度分析,对零部件进行干涉检查,在虚拟装配的基础上,对整车进行外形验证和偏摆实验。并通过例证,说明Inventor软件能够很好地克服传统设计方法的不足,亦可扩展到其它索道设备设计中,以便获得更好的设计质量。     

架空索道线路格构式塔架有限元分析

利用有限元分析软件对某索道线路支架进行了建模计算分析,建立了不同钢管截面尺寸、不同柱脚间距的多个塔架模型。通过计算得到了模型在各种工况下的应力和位移的计算结果,分析得出了最优设计方案。     

单线脉动循环吊厢组式客运索道MATLAB自动计算程序的开发及应用

根据单线脉动循环吊厢组式客运索道工作原理及线路计算特点,在MATLAB软件平台上编写该类型索道的计算程序,自动完成计算过程,提高了设计效率和设计参数的准确性。     

往复式客运索道液压缓冲阻力器原理及性能分析

本文介绍往复式管运索道应用的几种缓冲阻力器，着重分析了液压缓冲器的性能和工作原理，对理想缓冲速度曲线及缓冲质量的选取进行了探讨。     

连铸坯矫直变形阻力

目前,关于弧形连铸拉矫机对铸坯运行所产生的阻力存在着两种不同观点的算法,其计算结果相差较大。本文通过模拟实验及理论分析得出的计算方法与实验结果比较吻合。     

风险评价方法在客运索道中的应用研究

本文将风险评价方法引入索道的安全管理,在索道设计、施工、运营中首先对风险因素进行识别与归类,然后根据风险程度对各因素进行科学排列,进而有针对性地采取风险规避措施为索道的安全运行保驾护航。在简单叙述了风险评价的方法后,采用半定量分析法对索道中易存在重大事故隐患的重要零部件、易造成伤亡事故的关键零部件进行风险评价。     

干熄焦工艺系统阻力的计算和改善方法

对干熄焦工艺系统中工业装置管网的循环气体阻力计算方法进行研究,分别介绍了干熄炉、一次除尘器、锅炉、二次除尘器、热管换热器和连接管道内气流阻力计算方法,并讨论了干熄焦工艺系统各装置阻力计算方式的特点。结合干熄焦运行中的系统压力不稳定、局部焦炭漂浮、排焦温度高和风机效率低等问题,介绍了几种改善方法,如设计上的料钟布料、斜道区域优化和生产上调节布风和放散情况等。将理论计算与实际问题的处理相结合,以阻力计算指导风机的选型和现场问题的调控,确保干熄焦工艺系统的稳定运行和节能环保绿色生产。     

客运索道设备的维护与保养

根据笔者对索道设备的设计和现场实践经验，总结了维护索道设备的方法，提出了维修对象及具体措施，以保证索道设备的安全运行。     

转炉炉壳热应力分析

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。     

焦炭热性能指标意义浅析

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。     

Results of treatment of cancer of the cardia

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.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

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.