系数

The influence of excess air coefficient upon the thermal efficiency of heater has been discussed based on actual measurement and theoretical analysis on the relation between the excess air coefficient and flue gas loss, incomplete combustion loss and thermal efficiency of heater,the optimal excess air coefficient is given.

通过实际测试和理论分析过剩空气系数与排烟热损失、气体不完全燃烧热损失及加热炉热效率的关系，讨论了过剩空气系数对原油加热炉热效率的影响，给出了过剩空气系数的最佳范围。

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

Results show that the equivalent mass in normal direction depends on the modes of collision. In the case of reversed sliding and sticking, the coefficient of restitution varies as a result of the instantaneously changes of the equivalent mass during impacting process. The coefficient of restitution depends not only on the contact force, but also on the kinematical and dynamic parameters of the two rigid bodies. Moreover, a formula is proposed to calculate the coefficient of restitution.

指出法向等效质量依赖于碰撞状态，在反向滑动和停止滑动这两状态下的法向等效质量是变化的，因此导致其恢复系数是变化的，这样，恢复系数不仅与接触力有关，而且还与两刚体的运动和动力参数有关，同时给出各种碰撞状态下的恢复系数计算式。

Tested results and analysis show: seed condition has a significant effect on bulk density, a comparatively significant effect on drag coefficient, and little effect on particle density and restitution coefficient of rice seed; moisture content significantly affects bulk density, particle density and drag coefficient of coated rice seed; variety of seed has little effect on the properties of coated rice seed.

试验结果和分析表明：稻种状态对容积密度影响显著，对漂浮系数影响比较显著，对籽粒密度和恢复系数影响较小；含水率对包衣稻种的容积密度、业粒密度和漂浮系数影响显著；品种对包衣稻种的物理特性影响较小。

The parameter identification of viscosity coefficient for SiO_2 matrix composites;2. A method of obtaining the viscosity coefficient of material is based on the model of parallel arrangement of plastic component and viscous component.

以塑性元件和粘性元件并联的模型为基础，研究材料粘性系数的获取方法，给出了一些材料的粘性系数和影响因素之间的关系曲线，为模拟研究中粘性系数的获取提供一种方便有效的方法。

Measuring the coefficient of dynamic viscosity of 0-60g/l salt water under 10-30℃ by capillary tube viscosimeter, and performing the mathematical regression of coefficient of dynamic viscosity about temperature and concentration in order to realize the influence of temperature and concentration on dynamic viscosity of salt water.

2为了解温度和浓度对咸水粘滞系数的影响，使用品氏毛细管粘度计测定10—30℃下，浓度在0—60g/l之间的咸水的粘滞系数，并对咸水粘滞系数进行了浓度和温度的数学回归

This solution can solve problem by original coefficient matrix directly.

该方法不必一开始就去用新的系数矩阵代替原系数矩阵，而是可直接在原系数矩阵上进行求解，只是求解过程中的一些原则与最小化问题的求解原则有所不同。

This chapter also compare the beta coefficient of market index regression to beta coefficient of iron board index regression. Chapter three mainly discuss the current application of beta coefficient and problem when applied.

同时也做了钢铁板块上市公司β系数估计量的显著性检验以及用市场指数回归的β系数和钢铁指数回归的β系数的比较研究。

This text from 艾森斯坦 because of distinguishing the relevant conclusion between method and number theory inside gaved a few and whole coefficient polynomial can't invite of judge the method, discussed at the same time not higher than four times whole coefficient polynomial can invite sex problem, get some three times, four times whole coefficient polynomial can invite sexual and simple judging the method.

本文由艾森斯坦因判别法及数论中的有关结论给出了几个整系数多项式不可约的判定方法，同时讨论了不高于四次的整系数多项式的可约性问题，得到了某些三次，四次整系数多项式可约性的简易判定方法。

On the basis of analyzing the relationship between the coincidence coefficient and the gear bearing capacity in gear drives, the coincidence coefficient round number design method and the coincidence coefficient equation represented by the gear basic parameters.

对齿轮啮合传动中重迭系数与齿轮承载能力的关系进行了初步的探讨和分析，并推导出用齿轮基本参数直接表达的重迭系数方程和提出了"重迭系数圆整设计法"的概念。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。