焊接企业生产管理系统

通过对焊接企业的分析和总结,以 Oracle 为数据平台,运用面向对象的插件开发技术,设计、开发了焊接企业生产管理系统,以便对企业焊接生产线上所有物质、流程进行更精准的监控、管理,如对焊材、母材的管理等。同时,该系统集成了各种焊材的国家检验标准数据,并支持按企业特性进行修改,为质检人员制定标准提供便捷。     

面向大规模定制下的生产计划管控

现今大规模定制化生产的方案中成本、交期、个性化定制程度仍存在无法兼顾矛盾.相比传统的妥协方案,基于MTA和ATO的方案从系统整体的视角提出了可以同时满足几个需求的共赢解.引入了可得性生产和按单拼装的方法,提出一个从可得性和定制化生产兼顾的大规模定制化生产方案,并使用计算机技术设计并实现相应的生产计划管控系统并实际应用.该系统的可行性及有效性已得到实际验证.     

Maintenance Scheduling Optimization in a Multiple Production Line Considering Human Error

An analytical multiobjective maintenance planning model that maximizes reliability while minimizing cost and human error is proposed. In order to incorporate human error, the model minimizes the maximum human error over the planning horizon. Human Error Assessment and Reduction Technique (HEART) is used to quantify the human error. Maintenance activities include adjustment and replacement activities, in which each of them consumes a certain amount of human resource, spare parts, and budget and brings about a specified level of reliability and human error. Economic dependence is also considered, in which grouping maintenance activities reduces total cost. However, this may increase human error probability due to operator fatigue or time pressure. The main purpose is to investigate the relationship between human factors and maintenance activities to find the preferred maintenance plan. A multiple production line is considered as a case study. A sensitivity analysis is performed, and the effects of grouping and human factors on the preferred maintenance plan are discussed. It is shown how human proficiency may affect reliability and cost.     

高级氧化-IC-曝气工艺处理克林霉素生产废水实例

某药业股份有限公司克林霉素生产废水采用高级氧化-IC-曝气工艺处理,重点介绍了工程的调试启动。工程运行结果表明,出水水质稳定,COD为112mg/L,BOD5为23mg/L,SS为48mg/L,NH3-N为37.1mg/L,TN为49.6mg/L,硫化物为0.72mg/L,急性毒性(以HgCl2毒性当量计)为0.05mg/L,pH为8.22,处理后出水毒性和有机物浓度都大大降低,各项水质指标符合《化学合成类制药工业水污染物排放标准》(GB 21904-2008)的要求。     

浅谈煤矿过大陷落柱冒顶处理及预防措施

顶板冒落造成的人员伤亡、停产和设备损坏等事故,是煤矿生产的五大灾害之一。在我国煤矿的顶板事故中,掘进工作面冒顶事故占有较大的比例。以山西冀中某矿9102胶带顺槽掘进施工过陷落柱为例,在该事故中,出现大面积冒顶,导致无法正常施工,极大地影响了该矿工作面的安全生产。通过分析该冒顶事故,提出了相应的控制和处理方法,以确保工作面安全。     

Utilizing linguistically enhanced keystroke dynamics to predict typist cognition and demographics

Entering information on a computer keyboard is a ubiquitous mode of expression and communication. We investigate whether typing behavior is connected to two factors: the cognitive demands of a given task and the demographic features of the typist. We utilize features based on keystroke dynamics, stylometry, and “language production”, which are novel hybrid features that capture the dynamics of a typists linguistic choices. Our study takes advantage of a large data set (~350 subjects) made up of relatively short samples (~450 characters) of free text. Experiments show that these features can recognize the cognitive demands of task that an unseen typist is engaged in, and can classify his or her demographics with better than chance accuracy. We correctly distinguish High vs. Low cognitively demanding tasks with accuracy up to 72.39%. Detection of non-native speakers of English is achieved with F₁=0.462 over a baseline of 0.166, while detection of female typists reaches F₁=0.524 over a baseline of 0.442. Recognition of left-handed typists achieves F₁=0.223 over a baseline of 0.100. Further analyses reveal that novel relationships exist between language production as manifested through typing behavior, and both cognitive and demographic factors.     

Effect of photoaligning azo dye structure on liquid crystal anchoring energy

A method of controlling anchoring energy of surface interaction of liquid crystal photoaligning substances is considered to enhance the liquid crystal display performances. An important parameter of the dye's molecular structure that determines the ratio of polar and azimuthal anchoring energy is the ability to form dimers. The values of dimerization thermodynamic potentials have been found. The probability of the formation of dye molecules dimers is evaluated. The bonds conjugation transfer via intermolecular hydrogen bond is revealed, and anisotropy of polarizability of the hydrogen bond is evaluated. The effect of dimerization on polar and azimuthal anchoring energy of liquid crystal — azo dye system — is shown.     

Virtual-water content of agricultural production and food trade balance of Tunisia

This article is devoted to the assessment of Tunisian agricultural production and food trade balance water-equivalent. A linear regression model relating annual rainfall to crop yields is developed to estimate the agricultural production water-equivalent. Its implementation is based on national data for crop and animal production, leading to food demand water-equivalent quantification. Results highlight the relationship between agricultural and water policies and provide a picture of food security in the country in relation to local agricultural production, and to virtual water fluxes related to foodstuffs trade balance.     

基于超熵产生的河型稳定判别式

基于非平衡态热力学理论中的超熵产生研究河型的稳定性,对河型是否有可能转化做出定量判别分析。选择河流系统的广义力和广义流,构造出河流的超熵产生以及超能耗率,根据超能耗率推导出河型稳定判别式。应用该判别式分析了黄河下游5个河段3种不同河型的稳定性,计算结果表明这5个河段的河型是稳定的,近期没有发生河型转化的可能性,与实际情况相符。利用该河型稳定判别式,不仅可判别河型的稳定性,还可以预测河流调整方向,为河流整治工程提供科学依据。     

便携式多气体检测仪设计

介绍一种便携式多气体检测仪的设计方案,使用PIC18LF6620作为核心处理器,同时连续检测O2、CO、H2S、CH4四种气体的浓度。详细介绍了气体传感器工作原理及其信号处理电路。经过实际测试,该检测仪具有体积小、重量轻、灵敏度高、响应速度快、测量精确等优点。