| 1. | The cultivation of comprehensive quality in the teaching of chemical principles
化工原理教学与学生综合素质的培养 |
| 2. | Isolation and structure identification of chemical principles from paeonia lactiflora pall
赤芍化学成分的分离与结构鉴定 |
| 3. | The discussion of college student practice and creative ability on chemical principles
论化工原理课程教学中学生实践和创新能力的培养 |
| 4. | Understand the knowledge of chemical principle , environmental protection treatment facilities and monitoring analysis , etc
了解化工原理、环保处理设施、监测分析等知识。 |
| 5. | Objectives : the course is designed to make student understanding the physical and chemical principles of aerosol and instruments used to measure them
教学目的：本课程的目的是使学生了解有关气溶胶的物理和化学特性以及一些基本测量方法。 |
| 6. | The background leading to each incident will be presented , followed by an illustration of the chemical principles related to the interpretation of the unanticipated experimental results or observations
本科以具戏剧性的福至心灵化学发现为题，用简单科学语言讨论它们背后的动机及解释其中之所以出人意表的因由。 |
| 7. | The background leading to each incident will be presented , followed by an illustration of the chemical principles related to the interpretation of the unanticipated experimental results or observations
本科以具戏剧性的福至心灵化学发现为题，用简单科学语言讨论它们背后的动机及解释其中之所以出人意表的因由。 |
| 8. | In this thesis , the composition and chemical principle of the li - ion battery are presented firstly , which is followed by its characteristic and common charging approaches introduction . finally , the whole system is discussed where actual circuit design and realization are emphasized
文中首先对锂电池的组成及化学原理进行了简单介绍,接着介绍锂电池的特性及常用的充电方法,最后从芯片的整体结构开始,着重介绍芯片具体电路的设计与实现。 |
| 9. | Alkaline zinc - manganese battery is widely used all over the world it has good performance of storage ， low cost ， stable discharge and convenience of carrying the sealing of the battery is a crucial factor to the performance of the battery due to the disadvantages of present sealants ， leakage of electrolyte often happens what ’ s more ， the sealing capability affects the performance of the battery the way to raise the sealing capability is to search for a good additive ， which can improve the sealing capability through adding according to chemical principles ， this article picks out ptfe and nylon66 as additive adding ptfe or nylon66 into the pitch can improve the sealing capability of the pitch at the same time ， the temperature ， the time ， the amount of addictive ， the way to drop temperature and the time of churning all should be considered by testing the constitutions ， softening point ， moving degree and length of needle of various pitch samples ， we can compare the properties of different sealants can be studied by using of x - ray , the constitutions of the pitch can be indicated which can help us to explain these changes this article includes ： testing the constitutions ， soften point ， moving viscosity and needle penetration of various pitches ； raising the sealing capability by adding ptfe nylon66 into the pitches ； testing the constitutions ， soften point ， moving viscosity and needle penetration of raised samples ； analyzing and discussing the basic principles of this method it is showed that soften point ， moving viscosity and needle penetration of pitches are increased by adding ptfe nylon66 and the discharge time ， initial voltage ， capacity of battery with pitch raised by nylon66 are good and get to the requirement of gb t7 1 1 2 in a11 the method proposed in this article is available in practical industry use
通过测定改进沥青的软化点、运动粘度和针入度等指标参数来比较不同的添加剂及不同的添加条件对沥青封口性能的影响。本论文的主要研究结果为：系统测试了多种沥青样品的组成、软化点、运动粘度、针入度；对市售沥青分别添加聚四氟乙烯乳液、有机硅树脂和尼龙66进行改进，制备了改进产品；对改进沥青的组成、软化点、运动粘度、针入度进行了测试和比较；使用改进沥青组装成电池并对电池进行恒电流放电测试、短路电流测试和电池漏气、漏液性能的测试；对沥青改进的原理进行了分析和讨论。实验结果表明：在沥青中添加尼龙66和聚四氟乙烯乳液对沥青的封口性能有明显的提高；通过对工艺条件的不断改进，目前的工艺条件已完全可以用于实际生产操作；以添加尼龙66改进的沥青为封口剂组装成的电池完全满足碱锰电池生产的需要，且电池电容量、短路电流等指标均达到gb t7112标准要求；本文提出的改进方案，通过验证是一种效果好、实用性强的方法。 |
| 10. | Based on modern optimization theory and optimal control theory , this dissertation studies some questions as follows : 1 . the optimization model of parameter identification of three - dimensional geologic history numerical simulation , algorithm and its application geologic history numerical simulation is a basic content of basin numerical simulation , and the porosity is the major parameter in the evolution and development process of oil - bearing basin . according to the sedimentation and burial mechanism , the physical and chemical principles of oil geology , the mudstone porosity ' s non - linear parabolic partial differential equation has been established
本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1 、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。 |
