超声雾化性能的试验研究与回归分析

分析了煤矿井下呼吸性粉尘防治技术现状 ,重点介绍了水的超声雾化技术 ,并对其雾化性能进行了试验研究 ,最后应用回归分析建立了超声雾化性能的数学模型     

非稳态过滤除尘压力损失的研究

提出用于建立过滤层非稳态过滤压力损失模型的微观分析法和宏观分析法新概念，归纳出无论是纤维层过滤，还是颗粒层过滤，所反映的压力损失随过滤时间变化的规律是相同的，由此提出筇同观分析法和宏观分析法相结合的对纤维层过滤和颗粒层过滤均适用的非稳态过滤简化式，通过实验探讨了非稳态过滤压力损失比例常数的确定方法，并由此验证了该简化式的正确性。     

高压喷射注浆加固地基RJP工法及北京现场试验

为满足土木工程建设对大直径旋喷桩和超深基础防漏止水的需要，１９８８年ＲＪＰ（ＲｏｄｉｎＪｅｔＰｉｌｅ）工法应运而生。其旋喷桩直径达２４０～３２０厘米，固结体质量优良，工艺可靠，成本较低。１９９６年５月在旋喷发明人、本工法专利权拥有者中西涉博士的指导下，中日数公司在北京探矿机械厂内联合进行了ＲＪＰ工法现场试验。旋喷桩直径达３米，团结强度良好，施工工艺简单。试验结果表明，在拥有三重管旋喷设备和经验的中国有良好的推广应用价值和发展前景。     

生化需氧量的差压式测定方法的研究

本文研究了用差压式直读测定实验装置测定生化需氧量（ＢＯＤ５）的方法，验证了用该新技术测定ＢＯＤ５的可行性。该方法操作简单、直观性好，简化了大量烦琐操作并可连续测定。经对水样分析并用标准稀释法的分析结果加以比较，获得良好的效果。     

THE IMPACT OF PRESSURE SEWERS ON THE NATION'S WATER RESOURCES1

ABSTRACT. Over the last few years, several studies sponsored by both government and interested national engineering associations have evaluated the relative merits of pressure sewer systems. Surprisingly little data has been forthcoming, however, with regard to the effects of pressure sewers on both the economics of land development and the country's water resources. The intention of our paper is to detail the salutary effects of pressure sewers on water supply resources, the indirect effect on other resources by decreasing the contribution of sanitary sewage to their pollution, and to illustrate where, in some locations of the country, pressure sewers would benefit the economics of land development. As engineers from a large industrial firm that has built hardware that will allow the concepts stated above to become realities, we will present data to enforce our convictions. Some effects on municipal treatment plants, and emplacement costs of the system are described. Since the main thrust of our paper is to treat the effect of pressure sanitary sewers on the water resources of the country, specific peripheral data is not presented at length. The pressure sewer effects on lowering water usage in homes and the decrease in groundwater contamination by replacing septic tanks with pressure sewers in selected locations is presented. Advanced technology concepts such as energy assisted sewer systems should be considered as a favorable economic manner in which to preserve selected water resources. During the 1965 drought that affected the Northeastern section of the U.S., a federal government document reported that there was really no shortage of water, but that present water resources lacked management. Pressure sewers may be a water resources management tool and an effective one if not promulgated as a cure-all for the water pollution problems facing this nation.     

气瓶水压试验合格标准实验研究

水压试验是气瓶检验的主要项目,将容积残余变形率超过１０％ 作为气瓶报废的标准沿用至今。笔者通过实验,分析了气瓶水压试验现行评定标准存在的问题,并对采用容积弹性变形作为评定指标进行了探讨,以期为制订更合理的水压试验标准提供有益的启示。     

Predicting retail shrink from performance pressure,ethical leader behavior,and store‐level incivility

Retail shrink, a form of inventory loss due primarily to employee theft and shoplifting, is a growing concern for retailers. Prior work on shrink has taken primarily an individual‐level focus to understanding this problem but has yet to really explore how the business context impacts shrink. The current study addresses this need by delineating and testing a unit‐level (i.e., between‐stores) conceptual model, wherein we examine the influence of performance pressure, ethical leader behavior, and store‐level incivility on shrink in a field study of 111 U.S. retail stores. Results demonstrate that performance pressure and ethical leadership interact to influence store‐level incivility. Further, stores with higher incivility also had higher levels of shrink. A focus on the contextual predictors of shrink provides timely insights into the role of performance pressure and leadership on store‐level incivility and consequently on retail shrink. In light of increasingly thin margins in the retail industry, the evidence on how pressure to perform and ethical leadership influences retail shrink may offer a solution to retailers looking to stem financial losses by promoting civility in the workplace.     

人工煤气管道萘沉积量预测方法及影响因素研究

为了研究人工煤气管道内萘沉积量的预测方法及其影响因素,以昆明人工煤气输气干管为例,结合TGNET软件模拟输气干管的运行工况(选用BWRS状态方程,Colebrook-White流动方程)计算管内萘沉积量,通过改变模型参数(地温、输气温度及输送压力)分析萘沉积量的影响因素。结果表明:1)萘沉积量预测方法的计算结果与实际情况的相对误差仅为3.36%,方法可行;2)饱和萘含量随地温降低而降低,随管道输送压力降低而升高,随管道输送温度降低而降低,且管内外温差越大,萘沉积量越大;3)温度变化是造成人工煤气管道中萘沉积并堵塞管道的主要原因,建议在煤气进入城市管网前先对其作降温处理,冬季在弯管、调压器等易出现萘沉积的部位添加保温设施以维持管内温度。