对火电厂脱硫废水进行单独处理的必要性

根据脱硫废水中所含污染杂质特点和国内已有的标准、规定,对石灰石石膏法(湿式)脱硫废水单独处理的必要性进行了分析和讨论,认为无论从处理工艺还是从环保要求考虑,脱硫废水都应该单独处理。     

油浸鲣鱼罐头贮藏过程中挥发性成分的变化规律研究

运用电子鼻和顶空固相微萃取气质联用（headspace solid phase micro extraction gas chromatograph-mass spectrometer,HS-SPME-GC-MS）技术,分析不同贮藏时间的油浸鲣鱼罐头的挥发性成分的变化。结果表明:电子鼻能够快速、灵敏地检测到油浸鲣鱼罐头在贮藏过程中的气味变化。利用气质联用仪在油浸鲣鱼罐头贮藏过程共鉴定出47种可挥发性化合物,呋喃类化合物、含氮类化合物为主要挥发性成分,其中呋喃类化合物相对含量随着贮藏时间的延长,含量不断降低,从刚出厂罐头的51.42%减少到贮藏第4年的41.20%。电子鼻可以用来区分罐头的贮藏时间,超过保质期的罐头挥发性风味物质变化较大。      

一种瞬态高压条件下的密封设计

设计了一种新型的组合自紧式密封系统,该系统适用于瞬态高压冲击型气体密封。介绍了这种密封系统的结构,分析了其工作机制,并给出了密封材料及其关键尺寸选取的方法。实验证明该系统成功地为此类问题提供了解决方案。     

氮气保护在PP熔体流动速率测试中的作用

通过比较在有、无氮气保护的情况下聚丙烯(PP)熔体质量流动速率和熔体体积流动速率测试值的不同,探讨了PP熔体流动速率测试过程中氮气保护的作用。无氮气情况下PP在高温发生热氧化降解,分子链断裂,熔体变稀,致使测得的熔体流动速率值偏大;使用氮气吹扫可有效保护试样,更准确地测定熔体流动速率。     

基于多智能体系统的分布式智能控制系统框架与原型系统开发

针对复杂工业过程的控制需求,研究了一种基于多智能体系统的分布式集成智能控制系统框架,系统由人机集成单元、控制单元和虚拟仿真单元构成,每个单元由分层的Agent组构成。多个专业Agent和主管Agent组成功能Agent组,通过不同的Agent激活与后备构成Agent组的重构和控制模式的切换。采用基于PC和现场总线设备相结合的硬件结构,运用遵循职能物理代理基金会组织标准的开发工具Java智能体开发框架开发原型系统,并应用到焦炉集气管压力控制实践中。工程应用表明,所提出的集成控制系统能有效地解决焦炉集气管压力这类复杂工业对象的过程控制问题。     

Dried Blood Spots as Matrix for Evaluation of Valproate Levels and the Immediate and Delayed Metabolomic Changes Induced by Single Valproate Dose Treatment

The immediate and delayed metabolic changes in rats treated with valproate (VPA), a drug used for the treatment of epilepsy, were profiled. An established approach using dried blood spots (DBS) as sample matrices for gas chromatography/mass spectrometry-based metabolomics profiling was modified using double solvents in the extraction of analytes. With the modified method, some of the previously undetectable metabolites were recovered and subtle differences in the metabolic changes upon exposure to a single dose of VPA between males and female rats were identified. In male rats, changes in 2-hydroxybutyric acid, pipecolic acid, tetratriacontane and stearic acid were found between the control and treatment groups at various time points from 2.5 h up to 24 h. In contrast, such differences were not observed in female rats, which could be caused by the vast inter-individual variations in metabolite levels within the female group. Based on the measured DBS drug concentrations, clearance and apparent volume of distribution of VPA were estimated and the values were found to be comparable to those estimated previously from full blood drug concentrations. The current study indicated that DBS is a powerful tool to monitor drug levels and metabolic changes in response to drug treatment.     

WT615增压CNG电喷发动机燃烧特性数值分析

以WT615 CNG发动机为模拟研究对象,采用KIVA-3V软件建立了多维软件计算模型,并验证了模型的准确性。在此基础上研究了主要结构参数——燃烧室形状对燃烧特性和整机性能的影响。研究表明,直口形燃烧室的动力性、经济性能最好,更加适用于该天然气发动机,但排放性能有待提高;缩口形燃烧室的整机性能次之,碗形燃烧室的动力性和经济性则较差,后燃现象严重,不适用于天然气发动机。     

沿空掘巷小煤柱侧防瓦斯泄漏技术

针对赵庄煤业沿空掘巷存在的小煤柱侧瓦斯泄漏隐患,制定了"柔性薄喷+注浆"治理方案,采用柔性薄喷材料替代混凝土,喷涂厚度5 mm,有效解决了材料运输和开裂问题,采用高密度浅钻孔和快凝注浆材料,避免了浆液流入采空区。效果考察表明:柔性薄喷材料挂壁性和柔韧性良好,掘巷服务期间小煤柱侧未出现明显瓦斯泄漏。     

浅析带容器法兰中压储气罐的设计

本文介绍了中压储气罐的设计过程、设计参数的确定依据以及在设计过程中应注意的事项.     

Diagnosis of TIG welding based on ultraviolet radiation

Through collecting the radiation of tungsten inert gas (TIG) welding arc, the radiation distribution in ultraviolet zone is analyzed in order to study the variation rule of ultraviolet radiation versus welding condition. The explanation for the variation is also provided bused on spectral radiation theory of arc light. Furthermore, through analysis of disturbanee factors, the integral intensity signal of radiation in ultraviolet zone is applied for diagnosis of welding process. The spectral signal of ultraviolet radiation can reflect the disturbance factors and welding conditions, which can be used for online diagnosis of welding process.