400kA整流柜水冷装置控制部分的改进

以中孚实业的400 kA电解铝系列整流柜水冷装置为例,分析其控制回路的基本原理,对运行中存在的问题做出了改进,并给予验证,提高了对大功率硅整流柜冷却系统的控制精度.     

冰箱压缩机使用电工钢的状况及质量改进意见

调研了我国冰箱压缩机产销现状，指出了所使用的电工钢牌号、质量和数量，给出了武钢和日本电工钢研制状况，提出了冰箱压缩机用电工钢质量改进意见。     

Performance-focused Catalyst Design to Meet Diesel Quality Improvements—Part II

In this work, we present an experimental evaluation concerning the catalytic hydrocracking of gas oil (GO) feedstock. The study was carried out using five types of supported NiMo-based catalysts (100A, 100AP, 100AB, 100H-DY, and 30H-DY). Screening tests of the performance of these sulfided catalysts were carried out in a high-pressure batch autoclave at temperatures of 350°C-425°C, reaction time of 1-3 hr, catalyst/feed ratios of 5-10%, and initial hydrogen pressure of 6.0 MPa. This study clearly shows that the incorporation of H-DY zolite into aluminum borate (AB) matrix led to a greatly improved hydrocracking catalyst for production of lighter products, in addition to depressing the pour point of the diesel fuel product. In all experiments, the yield of gasoline and gaseous products increased dramatically by increasing the severity of the process variables. A high-pressure test unit was used to study the effect of different process variables as pressure (3.0-6.0 MPa), liquid hourly space velocity (1.5-3 hr^-1), hydrogen/ GO volumetric ratio (400 vol./vol.), and temperatures of 375°C, on the GO conversion to various products using 30H-DY catalyst, and to correlate the impact of process conditions on the yield and quality of diesel fuel and gasoline products to optimize the process     

井下运输机液力耦合器安全装置的改进措施

通过对某矿运输机的液力耦合器发生爆炸事故分析,发现其自身的保护系统设计不够完善,只有温度保护装置-易熔合金塞,没有过压保护装置,并提出井下运输机液力耦合器安全保护系统的改进措施。     

Home truths: Are housing-related events more important for residents’ health compared with other life events?

Moving home and home improvements are significant life events, but their health impacts are rarely studied in relation to other life events that occur relatively frequently in deprived populations. This article examines both housing and personal life events over a three year period among a study group living in deprived areas of Glasgow, in order to consider their impacts upon the health and well-being of residents. Housing-related events are the most frequently occurring life events, with relatively minor negative impacts upon physical and mental health and mental well-being; the effects of housing events are attenuated when other life events are taken into account. The largest negative effects on health are associated with serious health episodes, crime victimisation and relationship break-up, with the largest positive effects associated with getting a job. There is a case for holistic regeneration which offers personal support for life events and seeks positive interactive effects.     

聚乙烯缠绕结构壁管材B型结构的改进

本文介绍了聚乙烯缠绕结构壁管的常见结构,为了克服管材尤其是大口径管材在实际生产过程中出现的问题,对其B型结构进行改进,改变PP骨架管包覆结构,优化了产品结构,在减少原材料用量的同时,提高了产品的环刚度和质量。     

关于武汉厂降本增效的工艺改造

粉体物料在生产转运过程中,如果处理不好,在生产现场会产生一定的粉尘污染、噪音污染,甚至会增加企业的生产成本,而本文正式通过深入研究并进行工艺改造实践,达到了降低成本和减少污染排放的目的,效果明显,对其他工业生产具有良好的借鉴意义。     

100kt/a甲胺/DMF联产装置运行总结

介绍陕西兴化集团有限责任公司100kt/a甲胺/DMF联产装置的工艺路线、原料消耗定额情况及其环保措施,阐述生产中存在的问题及优化改造措施,并对我国甲胺行业现状作了分析。     

抗HIC及SSCC管线钢中氢含量的分析与控制

为提高管线钢在高硫化氢( H2S)环境下的抗HIC及SSCC的能力,避免腐蚀性气体造成的裂纹,对钢中w(H)进行了分析.通过采取减少电炉出钢及精炼过程渣料的加入量;合理控制电炉电极喷淋水的开启;优化VD过程Ar气流量控制等措施,使冶炼抗HIC及SSCC管线钢的精炼终点w(H)达到1.5×10-6以下.     

An investigation of Jones optimality and BTI-universal specializers

Jones optimality implies that a program specializer is strong enough to remove an entire level of self-interpretation. This paper argues that Jones optimality, which was originally devised as a criterion for self-applicable specializers, plays a fundamental role in the use of a binding-time improvement prepass prior to specialization. We establish that, regardless of the binding-time improvements applied to a subject program (no matter how extensively), a specializer that is not Jones-optimal is strictly weaker than a specializer that is Jones-optimal. We describe the main approaches that increase the strength of a specializer without requiring its modification, namely incremental specialization and the interpretive approach, and show that they are equally powerful when the specializer is bti-universal. Since this includes the generation of program specializers from interpreters, the theoretical possibility of bootstrapping powerful specializers is established.