比较级

Main contributions and achievements are as follows:A general non-equilibrium rigorous model for RDP is developed in this thesis. Based on the pseudo-homogenous assumption, two main factors reaction and separation are de-coupled, and an RDP model with the same format as that for a traditional distillation process is established. To solve the model with a large number of algebraic equations, modified M-K equations with tri-diagonal matrix form are developed based on the improved Separation Efficiency Functions, which greatly increases the iteration efficiency. This thesis also develops a general reactive distillation dynamic model. Through splitting of the differential variables based on SEFS, large-scaled differential algebraic equations can be solved with the improved Gear's algorithm which makes the dynamic model suitable for the on-line application. A simulation platform for the control loop design and evaluation of RDP by introducing control system equations into the dynamic model is also developed.A lactic acid purification pilot-scale RDP is investigated.

论文对热点问题——反应精馏过程的建模与优化控制相关技术进行了深入的研究，取得了一系列成果：1、建立了反应精馏过程机理模型，基于拟均相假设，将反应和分离过程进行解耦，推导出反应精馏过程的非平衡级稳态模型和动态模型，通过引入推广的分离效率函数，对模型变量进行了合理划分，显著提高了模型求解效率；将动态模型和控制系统方程结合，建立了反应精馏过程控制系统研究的辅助工具。2、全面分析了乳酸提纯反应精馏新工艺试验装置，利用本文建立的过程机理模型，对该试验装置进行了稳态和动态性能分析及水力学核算；设计和分析了单边质量控制方案，比较了间接和直接物料平衡控制两种方案的控制性能。

Methods According to Balthazar CT imaging manifestations, 110 cases with acute pancreatitis were chosen and classified into five grades, then compared with corresponding serum, urine amylase and C-reaction protein.

选取急性胰腺炎病例110例，将其CT表现分为5级，各级分别与其相应的生化指标数值进行比较与分析。

Known ships used by the Empire were the Diadem and the Battler .

帝国海军中比较著名的该级战舰是王冠号和巴特勒尔号。

Comparison between lesions displayed by airway post processing and the results of fiberoptic broncho...

由专家对不同扫描参数的气管后处理所显示的病变与支气管镜检结果进行比较，按Ⅰ、Ⅱ和Ⅲ级图像等级评判图像质量，并进行统计学处理。

In this paper,the results obtained from the differential scanning calorimetric method for melting point determination of slice of bottle-grade polyester under different conditions are compared with those obtained by using the melting-point microscopic method .

通过采用熔点显微镜法和不同测试条件的差示扫描量热法对瓶级聚酯切片熔点测定结果进行比较，研究了不同方法测定结果间的规律及不同测试条件对结果的影响。

The analysis of lake experiment's data validate the supposing model of vector sensor and some theories, including the dropping noise-field analysis, the distance testing, the biasing phenomenon of bearing-time course and the spectrum comparison between acoustic intensity and pressure.

湖试数据的实验分析，验证了矢量传感器的模型假设及其部分理论和现象，包括"雨滴"噪声场分析、"拉距"实验分析、方位时间历程的有偏现象以及声强谱与声压谱的比较，其间提出的5种谱级信噪比的估计方法，适用于实验环境的评估。

The generic data matrix and database of adult morphology of Tenthredinoidea were set up. The polarization of each morphologic character was concluded based on the evolutionary morphology, the inner group comparision and fossils analysis. The generic cladogram of Tenthredinoidea was calculated by PC586 computer using Hennig86 program. A new classification system for Tenthredinoidea was proposed based on the analysis of the cladogram. The tribal cladistic biogeography of the superfamily was analyzed using Diva program.

以成虫外部形态为主体建立和完善了叶蜂总科属级形态特征矩阵和数据库；采用进化形态学—内群比较—化石比较分析方法推断了各个特征的演化极性；应用Hennig86程序以427个叶蜂属为终端分析单元，在PC586计算机上运算，得出了叶蜂总科属间关系支序图，解析支序图，建立形式分类，提出了新的叶蜂总科分类系统。

These five years saw an increase in graduates from sports colleges,and student disposable employment rate in teaching profession declined.The highest rate of sports majors in secondary and higher schools ranks like follows:Sports Education,Social Physical Cultural and Ethnic Traditional Sports;2.Employing units have unsatisfied evaluation on professional dedication in the process of evaluating morality of gradates from our university;also not satisfied with the fact that these graduates are not strict with themselves and be models for students,indicating that there being needs and room left for strengthening and improving students' ideological quality.3.Employing units' evaluations on knowledge structure of graduates from our college:an unanimous affirm of the solid professional skills,and professional skills should not be neglected but strengthened and it needs improvement and creativity;there is polarization in using computers,so we need to think about how to teach computer courses in future teaching process;units are not very satisfied with graduates' foreign language proficiency,the university should lay emphasis on this.4.Employing units' evaluations on graduates ranging from strong to weak:dissatisfaction on organizing and management ability,conducting teaching and training and solving emergent events,and also on demonstrating and explaining and scientific research,to be specific, gradates' acts and skills are not standard,their explanatiens don't seize the key points, demonstrating and explaining ability of athletic training majors are better than that of other majors,and the overall scientific research ability of our graduates are not high enough to meet the employing units' demands and there is still a gap between them.5.Graduate needs from the grass-roots level unitsThe most welcome sport of the grass-roots level includes football,basketball,track and field and aerobics;basic requirements for middle school in new era PE teachers in include finn professional skills,proficiency of computer and foreign language,profound knowledge of humanities and arts and relevant knowledge comprehensive quality of new era teachers is the guarantee whether quality-oriented education of middle schools can be undergone.

从事教学工作专业由高到低依次为：体育教育、运动训练、社会体育和民族传统体育。2用人单位对我院毕业生道德品质方面的评价的总体评价是较好的，其中对敬业精神的评价存在不满意的现象；严于律己，为人师表方面存在不满意的现象，说明对学生思想素质的培养方面仍有加强和提高的空间与必要。3用人单位对我院毕业生知识结构的评价为：毕业生的专业基础掌握比较好，得到了用人单位的一致肯定，学院对毕业生专业基础知识的教育不能掉以轻心，需再接再厉，不断创新；计算机的学习上出现了两级分化，所以在今后的教学过程中，对计算机知识这门课如何开展是我们需要解决的实际问题；外语知识的掌握满意度不是很高，需要学校方面引起一定重视。4用人单位对我院毕业生能力的评价：对组织管理能力，指导教学与训练能力和突发事件处理能力比较满意，然而在示范与讲解能力和科研能力上存在着不满意的现象，主要表现在动作技能不规范，讲解抓不住关键要素，通过调查显示往往运动训练专业毕业的学生在示范讲解这方面要好于其他专业，科研能力整体评价不算很高，与用人单位的需求存在一定的差距。5基层对毕业生的需求对专项的需求足球、篮球、田径、健美操是基层中学较受欢迎的项目；新世纪具备综合素质的教师受到用人单位欢迎，这是素质教育能否有效开展的保证，也是体育教师开展体育创新教学工作的基础。

Every sub-circuit is designed reasonably according to the principle and character of PWM switching converter, such as: bandgap, error amplifier, oscillator, narrow pulse generator, saw tooth generator, PWM comparator, PWM modulator, output stage, OCP circuit and low voltage comparator.

根据PWM开关电源的原理和特点，合理地设计了各个子电路，其中包括：带隙基准源、误差放大器、振荡器、窄波发生器、锯齿波发生器、PWM比较器、PWM脉冲调整器、输出级电路、过流保护电路和低压比较器等。

Methods:The formula of Cockcroft—Gaulta as the method of calculating GFR and fractionated was adopted according to the diagnostic criteria of K/DOQI;then we separated randomly 226 CKD patient...

结果：调查表明：CKD 3、4级检出率高达75.3％。结果：中医药治疗组治疗30d 后，与治疗前比较及与对照组比较，均有显著性差异(P＜0.01)。结论：60岁以上无肾损害 CKD 检出率较高；中医药临床治疗有效，而且无副作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。