零件族遗传优化基因变型设计研究及其在焊接行业中的应用

将变型优化产品设计和基因遗传算法融合分析,提出了零件族遗传优化基因变型设计,给出了零件基因和零件族的定义,构建了零件族模型树状基因图、实例化图和存储文档,阐述了零件族遗传优化基因变型设计算法步骤、伪码描述及流程图,分析了算法的有效性,最后开发了基于基因遗传算法的优化变型设计焊接零件族库。     

机床超声检测附件产品族数据采集系统设计

为了使机床超声检测附件产品族实现在线超声检测功能,需要设计数据采集系统。数据采集系统的设计包括硬件设计和软件设计。其中硬件设计主要包括数据采集卡和超声波探伤仪的选择;软件部分设计以LabVIEW为平台,采用产品族模块化的设计思想开发了数据采集系统。最终设计出由CTS23型探伤仪和AC6684A/D卡为硬件、以LabVIEW为软件处理部分的数据采集系统。该数据采集系统可应用于机床,实现超声检测附件产品族的在线检测功能。     

Molecular Bases of Human Malformation Syndromes Involving the SHH Pathway: GLIA/R Balance and Cardinal Phenotypes

Human hereditary malformation syndromes are caused by mutations in the genes of the signal transduction molecules involved in fetal development. Among them, the Sonic hedgehog (SHH) signaling pathway is the most important, and many syndromes result from its disruption. In this review, we summarize the molecular mechanisms and role in embryonic morphogenesis of the SHH pathway, then classify the phenotype of each malformation syndrome associated with mutations of major molecules in the pathway. The output of the SHH pathway is shown as GLI activity, which is generated by SHH in a concentration-dependent manner, i.e., the sum of activating form of GLI (GLIA) and repressive form of GLI (GLIR). Which gene is mutated and whether the mutation is loss-of-function or gain-of-function determine in which concentration range of SHH the imbalance occurs. In human malformation syndromes, too much or too little GLI activity produces symmetric phenotypes affecting brain size, craniofacial (midface) dysmorphism, and orientation of polydactyly with respect to the axis of the limb. The symptoms of each syndrome can be explained by the GLIA/R balance model.     

镍系充油顺丁橡胶BR9073的应用

介绍了充油顺丁的发展情况、性能特点和用途,对齐鲁BR9073的应用开发状况进行了叙述,并提出几点建议。     

大石山区家庭水柜工程建设应用技术分析

结合广西大石山区家庭水柜工程建设中遇到的工程地质问题,从家庭水柜工程布置、蓄水池结构设计等方面,对大石山区家庭水柜建设应用技术进行了分析介绍,总结经验,为大石山区家庭水柜工程建设提供参考。     

关于未来供热技术潜在发展方向的思考

对未来供热技术潜在进展方向进行了论述。内容涉及供热与空调行业和融合、供热行业生产模式的变化,并介绍了几种典型的系统,比如多联产系统、分布式家庭能源中心、热泵技术的综合利用,提出了供热空调工程的个性化、精细化的构想。     

原油中C26－C28三芳甾烷相对含量计算方法及其应用

三芳甾烷（TAS）是规则甾烷芳构化产物,其中C₂₆-C₂₈三芳甾烷系列稳定分布于原油和烃源岩有机质中。在常规色谱-质谱分析得到的芳烃馏分（m/z231）质量色谱图上,由于C₂₆20R和C₂₇20STAS异构体共流出而不能确定3种不同碳数三芳甾烷的相对含量,无法建立类似于C₂₇-C₂₉规则甾烷的相对含量三角图,从而使三芳甾烷在油气地球化学中的应用受到限制。以塔里木盆地台盆区古生界代表性原油样品为例,建立了三芳甾烷相对含量三角图,并用北部湾盆地福山凹陷古近系原油进行了验证。结果表明：该区存在2种不同来源的原油,可以划分为2个不同的原油族群,而来自福山凹陷古近系的原油具有不同的C₂₆-C₂₈三芳甾烷组成特征,原油族群的划分也得到其他分子地球化学证据的支持。在高成熟的轻质油和凝析油中,规则甾烷系列由于浓度低而很难由常规的色谱-质谱分析技术进行检测和鉴定,三芳甾烷由于相对较高的热稳定性而稳定存在,因此可代替规则甾烷用于油-油对比和原油族群划分。     

FCC FAMILY TECHNOLOGY BRIDGING PETROLEUM REFINING WITH PETROCHEMICAL INDUSTRY

Since the demand of lightolefins as petrochemical raw feedstocks is increasing,FCC is being extend-ed to a lightolefin generator from conventional transportation fuel production.In recentyears,a seriesof FCC family technologies,such as DCC,MGG and CPP,have been developed by the Research Instituteof Petroleum Processing( RIPP,SINOPEC) for the production of lightolefins from the heavy hydrocar-bons.Up to now,several commercial DCC and MGG units have been puton stream inside and out…