优缺点

A comparison is made of advantages and defects among protective measures,including adopting advanced imported regulator ,installing fast isolating valve in front of regulator ,using two-circuit regulator plus fast isolating valve,installing excessive underpressure automatic isolating valve in front of domestic gas meter etc.

分析了中压燃气直接进入用户燃气表的危害，比较了采用先进的进口调压器、在调压器前安装快速切断阀、采用双回路调压器加快速切断阀、在家用燃气表前装设超欠压自动切断阀等预防措施的优缺点，提出了其适用场所。

Various automatic tuning principles for arc suppression coil are discussed and analyzed in this paper,the merit and shortcoming of various automatic tuning method are presented,and the problem which should be noticed is presented.

对消弧线圈的各种自动调谐原理进行了详细的分析和讨论，提出了各种调谐方法的优缺点和调谐时应注意的问题。

Some expanding structures of tube to tube -sheet used in HP heater have been described in the article.

文章介绍了高压加热器几种管子管板胀接结构，对不同胀接手段进行了比较，分析其优缺点；对液压胀接的原理和计算公式以及管子管板液压胀接试验过程进行了表述。

The tissue maintained the secretion activity under 72 h in roller tube culture, which was indicated by the MTT3-(4,5-dimethylthiazol-z-y1-2, 5-diphenyltetrazolium bro-mide value and oligonucleosomal fraction of cellular DNA.

通过台盼蓝染色观察、培养组织观察、测定 MTT 二甲基噻唑二苯基四唑嗅蓝活性和基因组 DNA 降解成为 1 000 bp 以下核苷酸片段量来比较两种方法的优缺点。

This article introduced one kind of use was mad-the solid two-phase flow related theory and the related heat transfer research trial result,establishes the process mathematical model,carries on the pa...

介绍一种利用气固两相流动有关理论及有关传热研究试验结果，建立过程数学模型，对气流干燥管进行分段，分区间逐次计算方法，其计算结果与实际情况吻合较好，并通过对直管与脉冲管的计算结果分析其优缺点，可以用于工程计算。

Mechanics method can only solve simple engineering problems,so this paper analyses the two common structure of the sealing of tail shaft through finite element method.

针对经典力学法只能求解较为简单的工程问题的缺陷，通过有限元法对舰船艉轴的两种常用密封形式进行了动力学分析，将计算结果通过数值方法加以整合，并从中找到与实际运行过程相符的计算结果进行分析，直观地展现了两种密封结构的优缺点。

In this paper,based on study of Fuzzy control algorithm and PID algorithm,and for the advantages and disadvantages of this tow algorithm,putting forward the Fuzzy-PID compound control for swivel table control system.

基于对模糊控制算法和PID控制算法的研究，和鉴于两种算法的优缺点，提出了模糊-PID复合控制算法用于转台控制系统中，这种控制算法将大大提高转台抗外部干扰和内部参数变化的鲁棒性能，改善了转台的动、静态特性。

Based on the existing work, we give the detailed introduction of factors, such as soil texture, wind velocity, vegetation, crop stubble mulch, soil moisture, terrain, artificial factors and so on. We also elaborate the quantitative relation between all related factors and wind erosion amount. At last, we summarize the exiting wind erosion controlling measures. The main purpose of this paper is to provide some references for experiment studys on wind erosion of soil and putting forward feasible controlling measures.

本文通过对前人所作研究工作的总结，详细的介绍了土壤质地、风速、植被、作物残茬、土壤湿度、地形、人为因素等影响土壤风蚀的因子，并阐述了各相关因素与风蚀量之间的数量关系；同时总结了当前几种能够有效防治风蚀的措施及其各自的优缺点，旨在为今后开展相关土壤风蚀影响因子的实验研究和提出合理的治理措施提供一定的参考作用。

The category and application of stop pin in punching die are discussed, and some typical structural form s are mainly introduced, as well as its advantage and applied situation are analyzed respectively.

讨论了冲模中挡料销的种类及其应用，着重介绍了几种典型的结构形式，分析了其优缺点及应用场合。

You will be helped to make a smooth transition from Impromptu tune blocks and pitch contour notation to conventional staff notation, while drawing out the differences along with the advantages and disadvantages of each.

当过程中引申出每一个的优缺点的不同时，你将有助于从Impromptu的曲调方块和音高线条的记谱到传统五线谱记号的记谱可以有一个顺畅的转变

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。