双气室油气悬架特性研究

为改善越野车辆的行驶平顺性,提出一种双气室油气悬架.对双气室油气悬架的结构进行了分析,阐述其工作原理,并建立其数学模型.基于某越野车的参数,建立1/4车辆振动模型,通过仿真分别研究双气室油气悬架的各个参数对其车身加速度、悬架动挠度及车轮相对动载的影响.结果表明,内置蓄能器对车轮相对动载影响大于外置蓄能器;外置阻尼器对平顺性的影响大于活塞上阻尼孔的影响.通过对结果的优化确定了双气室油气悬架的参数,分别在时域和频域内对装有双气室油气悬架、单气室油气悬架以及螺旋弹簧的车辆的平顺性进行了对比.仿真结果表明,与单气室油气悬架和被动悬架相比,采用双气室油气悬架可明显改善车辆的行驶平顺性,更适合于越野车辆.     

Coriolis mass flowmeters: Overview of the current state of the art and latest research

This paper is an update of the overview given by Baker RC [Coriolis flowmeters: Industrial practice and published information. Flow Meas Instrum 1994;5(4):229–46]. Overviews about mass flowmetering are also given in Baker RC [Flow measurement handbook. Cambridge University Press; 2000]. Furthermore, Drahm W and Linnartz H [Coriolis-massflowmeters: State of the art review and innovations. In: Proceedings FLUCOME 2003. 2003] reported about latest innovations in Coriolis technology.

The published information of the last decade is reviewed and the conclusions of the different papers are briefly described.     

130 t/h循环流化床锅炉耐火材料的性能要求

对蒸发量130t/h循环流化床锅炉的运行工况及其对各部位内衬的选材要求进行了综合分析，并提出了内衬结构的设计方案以及主要材料的性能要求。     

Experience-based mitigation of age-related performance declines: Evidence from air traffic control.

[Correction Notice: An erratum for this article was reported in Vol 15(2) of Journal of Experimental Psychology: Applied (see record 2009-09189-003). In the article, the URL published for the supplemental material was incorrect. The correct URL is http://dx.doi.org/10.1037/a0014947.supp] Previous research has found age-related deficits in a variety of cognitive processes. However, some studies have demonstrated age-related sparing on tasks where individuals have substantial experience, often attained over many decades. Here, the authors examined whether decades of experience in a fast-paced demanding profession, air traffic control (ATC), would enable older controllers to perform at high levels of proficiency. The authors also investigated whether older controllers would show diminished age-related decrements on domain-relevant cognitive abilities. Both young and old controllers and noncontrollers performed a battery of cognitive and ATC tasks. Results indicate that although high levels of experience can reduce the magnitude of age-related decline on the component processes that underlie complex task performance, this sparing is limited in scope. More important, however, the authors observed experience-based sparing on simulated ATC tasks, with the sparing being most evident on the more complex air traffic control tasks. These results suggest that given substantial experience, older adults may be quite capable of performing at high levels of proficiency on fast-paced demanding real-world tasks. The implications of these findings for global skilled labor shortages are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

用广义拟压力法确定产液气井流入动态

单相气体产能方程有其自身的局限性。广泛使用的压力和压力平方法是对气井在不同的压力区间通过简化而得到的;尽管单相气体拟压力产能方程采用了更严格的处理方法,但也不再适用于油、气、水多相渗流。为此,提出了广义的拟压力函数,从而导出适用于气井多相渗流的产能方程。通过实例计算证明该方法是正确、可行的。     

隔河岩大坝的初期运行

隔河岩大坝建于90年代，以其新颖的结构和有效的消能方式以及高速的建设速度为世人瞩目，文章简单介绍了其结构布置及初期运行状况，特别是拦洪泄洪的大坝工作性状。     

土坝漫顶后冲沟网形成模拟

根据土坝漫顶后冲沟网形成的特点,建立了能够模拟土坝漫顶后冲沟网形成的元胞自动机模型。在元胞自动机模型中采用坡降模式模拟水流运动,采用冲刷率公式模拟坡面冲刷,确定了坡面径流和坡面冲刷规则。在计算中考虑了地形随机起伏变化和坡面抗冲性能差异2个影响因素,得出不同因素对冲沟网形成的影响。结果表明:单一考虑地形随机起伏变化形成的冲沟网较顺直,综合考虑2个方面影响的计算结果比较合理。     

潜污泵的水力设计方法及应用

潜污泵的水力设计目前尚未有成熟的设计方法。这里介绍了一种半经验半理论的潜污泵水力设计方法,涉及叶轮入口直径、出口宽度、出口直径、叶片出口安放角等关键参数计算选取及叶轮、泵体的绘型;按此方法设计的潜污泵制造加工后进行了性能试验,泵的性能达到设计要求,表明该潜污泵设计方法具有一定的实用价值。     

转换板厚度对高层建筑板式转换结构抗震性能的影响分析

本文以实际工程为例,分析了转换板的厚度对高层建筑结构抗震性能的影响,研究了板式转换的高层结构的受力与变形特点,并且与梁式转换结构进行了比较。本文的研究可以让设计人员能更详细地了解高层建筑板式转换结构的力学性能,为日后的设计提供参考。     

建筑结构胶应用中的若干问题及建议

就建筑结构胶在工程应用中的分类及性能要求、长期性能、防火及耐高温要求、无机胶研发、锚固胶的作用机理,以及胶接加固的可靠性等问题,结合试验研究进行了分析。建议编制《结构胶性能检验标准》;胶的长期性能应考察更长的时间;高温环境应采取耐高温胶;可以积极开发无机胶;应对胶的作用性能、基材性状、锚固参数及其破坏形态进行综合分析;胶接加固应联合其他加固方式,保证加固的可靠性。