一道二组分相平衡系统计算题的解法

物理化学知识点繁多,公式多而难记,对典型习题采用不同方法解题可以有效的提升教学效果。对一道二组分相平衡系统的习题分别应用了杠杆规则和物质守恒原理两种方法进行解题,通过分析对比,总结了两种解题方法各自的优点。对同一题型采用不同方法进行解题,加深了学生对杠杆规则的理解,提高了学生灵活应用杠杆规则解题的能力,使学生进一步认识到物质守恒原理在相平衡中的重要性。     

杠杆规则在化学计算中的应用

文章是以具体的例题将物理学中的“杠杆规则”应用到化学计算中。     

塔里木YQ7井阳离子钻井液的研究与应用

根据塔里木YQ7井地层情况，在现有钻井液基础上引入阳离子处理剂，将传统聚合物钻井液、聚磺钻井液改良为新型阳离子钻井液。室内对阳离子钻井液进行了性能评价和配方优选，确定出了阳离子钻井液最佳配方。现场应用表明，阳离子钻井液性能稳定，抑制能力强，具有优良的流变性，较强的携带岩屑、防泥包钻头作用，提高了钻井速度；该配方防塌效果好，井壁稳定，井径规则，并与常规处理剂配伍性好，维护处理容易，满足离开YQ7井钻井施工要求。     

化妆品配方设计规则的探讨

化妆品配方设计是从事化妆品新产品开发和生产的首要环节,是化妆品市场、功能定位的关键。文中从各类化妆品配方设计一般方法出发,探讨化妆品配方设计的共性规则,可供同行在工作实践中参考。     

多组分精馏物料衡算分离指标的探讨

多组分精馏物料衡算的分离指标有20种,每种的计算方法均不同。浓度型用浓度杠杆规则求解直观快速。推导给出了20种指标下清晰分割假设物料衡算中采出流量的计算通式。分离指标间接地给出了精馏原料的分离因素。     

医院调剂室药品货位号的管理与应用

目的提高医院调剂室药品上架及调配效率。方法利用信息技术,结合药品使用频率、联合用药规则等条件,对每个规格的药品进行货位号编排。结果药品货位号的应用提高了药品上架的效率和调配的准确性,有效的缩短了药品的配方距离及科学的安排配方路线。结论对调剂室药品进行货位号管理,效果明显,值得推广。     

聚氨酯树脂及其涂料

日趋增长的环境意识导致涂料配方的变化，如依据VOC规则等实现更严格要求的一种方法是向更高固体或无溶剂体系改变。过去在许多涂料体系中已使用了聚氨酯型分散体来分散颜料，结果得到更低的研磨料黏度且改善了着色性，尤其是在高档应用（如汽车涂料）中，     

黄河水水质配方实验及其应用

该文通过水质调查和大量实验数据，对循环水改为黄河水质运行的配方进行了筛选，并提出了自然ｐＨ全有机配方的概念，通过监测数据，对黄河水配方运行情况进行了总结，该配方投用后，不但能节约地下水资源，而且经济效益显著。     

石灰窑窑顶杠杆及其支座改型

分析石灰窑杠杆突发断裂及其中间销轴频繁磨损的原因,针对其故障现象,对杠杆结构进行改型,避免杠杆突发断裂及中间销轴的磨损,阐述了新型杠杆整体加宽及将杠杆支座更换为轴承座,轴承座内安装型号为22315的双列调心滚子轴承的结构特点和使用效果。     

电动抗折机传动电动机的行程控制故障及改进

我公司2　500t/d生产线采用DKZ-5000型电动抗折试验机对水泥进行抗折强度检测。开始加荷后，大杠杆逐渐下沉落下，固定在大杠杆（标尺）末端的撞板下压限位开关，断开传动电动机电源，停止运转。     

Account of cullet composition in calculation of batch formulas

Methods for solving the problem of taking into account the oxide composition of cullet in calculating a glass batch formula are analyzed. An approach to solving this problem consistent with the program for batch formula calculation is described.     

玻璃配合料的均匀度

根据数理统计理论对玻璃配合料的均匀度作了分析并导出了计算公式，在此基础上对无槽平板玻璃配合料的均匀度作了测试，并对影响均匀度及其测定的因素作了分析。     

Automation of Batch Formula Calculation

Problems arising in automating the calculation of the glass batch formula and algorithms used to solve this problem are considered. A universal programs for automating the batch formula calculation is described.__________Translated from Steklo i Keramika, No. 4, pp. 27 – 30, April, 2005.     

SBR法处理丁二醇废水动力学研究

对高浓度丁二醇生产废水进行了SBR法小型模拟基质浓度降解动力学研究,求取了有关的动力学参数。结果表明Monod方程的修正式能很好地描述丁二醇的降解规律,试验温度下Monod方程的修正式为:v=0.044(S-100)/[5719+(S-100)]。试验数据还表明在停留时间达40h时,丁二醇废水的降解达到稳定。     

用夹紧区原理确定多元恒回流比分批精馏最小回流比

夹紧区是精馏塔内出现的浓度几乎不变的区域,对于三元物系来说,根据夹紧区在塔内出现的位置可分为：上、中和下加紧区.在无穷板数和任一瞬时釜浓下选择不同的回流比可使分批精馏处于不同夹紧区下操作.文中讨论了三元恒回流比分批精馏过程中夹紧区的演变,在Rayleigh方程的基础上建立了应用夹紧区原理确定多元恒回流比分批精馏最小回流比的方法.该方法并不要求相对挥发度为常数,并且能准确计算顶浓,克服了通常所采用的Underwood公式法的缺陷,为多元分批精馏的简捷设计奠定了基础.     

用于航空半导体电咀SnO_2半导体陶瓷的研究

本文研究了以ＳｎＯ２为基础的半导体陶瓷，论及了其配方范围、工艺方法、各组分的影响关系以及性能特点等，指出该材料能满足航空点火系统点火的性能要求。     

An approximate mathematical framework for resource-constrained multistage batch scheduling

A rigorous representation of the multistage batch scheduling problem is often useless to even provide a good feasible schedule for many real-world industrial facilities. In order to derive a much simpler scheduling methodology, some usual features of multistage batch plants should be exploited. A common observation in industry is that multistage processing structures usually present a bottleneck stage (BS) controlling the plant output level. Therefore, the quality of the production schedule heavily depends on the proper allocation and sequencing of the tasks performed at the stage BS. Every other part of the processing sequence should be properly aligned with the selected timetable for the bottleneck tasks. A closely related concept with an empirical basis is the usual existence of a common batch sequencing pattern along the entire processing structure that leads to define the constant-batch-ordering rule (CBOR). According to this rule, a single sequencing variable is sufficient to establish the relative ordering of two batches at every processing stage in which both have been allocated to the same resource item. This work introduces a CBOR-based global precedence formulation for the scheduling of order-driven multistage batch facilities. The proposed MILP approximate problem representation is able to handle sequence-dependent changeovers, delivery due dates and limited manufacturing resources other than equipment units. Optimal or near-optimal solutions to several large-scale examples were found at very competitive CPU times.     

A MODIFICATION OF THE EMPIRICAL FORMULA IN GLAZE AND ENAMEL CALCULATIONS1

Objections to the Usual Type of Molecular Formula .—The shortcomings, disadvantages and objections to the usual type of molecular formula are reviewed, and it is shown by calculation back to the batch mixture how the molecular formula may be misinterpreted. New Type of Molecular Formula Proposed .—The following type of an empirical formula is proposed. Advantages of New Type.—The advantages of this new type of formula are that (1) it presents its data in the usual simple and graphic manner; (2) it indicates the mineralogical and physical condition in which most of the important constituents are introduced into the batch; (3) it admits of but little danger of obtaining the wrong batch mixture upon calculation back to the raw materials; and (4) the conclusions to be drawn from it are quite fixed and definite.     

注塑模具中杠杆先复位机构设计

结合注塑模具设计实例,介绍杠杆先复位机构,并导出了杠杆先复位机构设计计算公式。