参数

The lift course of hanging device on wheat no-tillage planter was simulated by using the software of ADAMS. Some important parameters were obtained such as height of the working part relative to ground, the distance between the working part and the rear wheel of tractor, the angle of road pass and the force of hanging point, etc. The key parameters of the hanging device and its best working parameter of hanging device were found out through optimization simulation. Simulation results showed that suspension point had minimum force when variable DV_1 and DV_2 gained corresponding maximum and minimum at scope of structure limit.

应用ADAMS软件对小麦免耕播种机悬挂机构提升过程进行了动态仿真，得到了工作部件的位置高度、工作部件与拖拉机后轮之间的间距、路面通过角以及悬挂点的受力等参数，找到了悬挂机构的关键参数，通过优化仿真，得到了悬挂机构的最佳工作参数，仿真结果表明，设计变量DV_2、DV_3在结构受限范围内分别取其最大值和最小值，悬挂机构悬挂点受力最小。

By setting up the mathematical models of the regulating objects （combusting heat transfer, heat utilization and storage, superheater and main steam pipe line）, by combining heat transfer function of regulating system and by selecting method of setting PID accoding to set attenuation index object, the corrections among PID and pulverized coal＇s caloric values are found. Now the PID can be set according to caloric values of the pulverized coal burned in the unit and the automatic control can be put into operation.

通过建立调节对象四个环节（燃烧传热过程、热量的利用和储存过程、过热器、主蒸汽管道）的数学模型，结合调节系统的传递函数，选用按给定衰减指数设定PID参数的方法，找出PID参数与煤粉热值的关系式，最终达到在机组燃烧不同热值的煤粉时可依据该方法设定不同的PID参数、并都能投自动的目的，从而有利于提高机组的稳定性，并可节约煤粉。

Many test parameters proposed in these methods have widely accepted in the literature for sample pretreatment, tem-perature, enzyme dose, pH, and reaction time. This study used sodium arsenate (Na2HAsO4E7H2O) and NIST 2710 soil as the standards to investigate the effect of mixing intensity, liquid to solid ratio, extraction time, and extract pretreatment methods for the determination of bioavailability.

文献中对於体外试验操作参数与程序，如样品前处理、温度、酵素添加量、胃肠相pH值与反应时间等参数已渐趋一致，本研究针对尚未深入探讨之重要参数进行试验，以砷酸钠(Na2HAsO4.7H2O)与标准土让(NIST 2710 soil)，探讨蠕动强度、液固比、小肠相萃取时间以及萃取液前处理方式对生物有效性之影响。

This paper is a research on the calculation theories and methods of cable suspension bridge construction control. It focuses on the sensitivity analysis of two design parameters - elastic modulus of main cable and dead weig;ht of bridge slab, which are key factors to the suspended structure.

本文针对悬索桥施工监测与控制的计算理论和方法开展研究，重点讨论了影响悬索桥结构行为的设计参数，通过设计参数敏感性分析，确定了对悬索桥变形有较大影响的两个设计参数——主缆的弹性模量和桥道板自重集度。

Skid wooden box parametric design system was designed by using Visual Basic and Access, based on SolidWorks. The establishment of databases and standard model bases as well as parametric design procedures was introduced. The function of the system was illustrated by specific examples. The system can generate qualified skid wooden boxes by inputting basic parameters. Automatic wooden box design was realized.

利用Visual Basic语言，并结合Access数据库，对SolidWorks软件进行二次开发，开发了滑木箱参数化设计系统详细介绍了数据库、标准模型库的建立以及参数化设计过程并通过实例展示了系统的具体功能，用户只要输入基本参数，系统即可生成符合要求的木箱，实现了木箱设计的程序化、自动化。

According to the series -wound and shunt-wound principle of composite material and equivalent deformation,the calculation formulas for determining the viscoelastic parameters of the effect zones for RCC dam are derived.

根据复合材料力学的串并联理论和变形等效原理，推导了碾压混凝土坝层面影响带粘弹性参数的计算公式，并结合大坝整体粘弹性参数的反演以及相关的试验成果，提出了层面影响带的粘弹性参数的求解方法。

Analysis of ship parametric rolling in head sea;2. A numerical simulation method based on ITTC recommendation was used to investigate the occurrence and magnitude of parametric rolling in longitudinal regular waves.

基于ITTC推荐的参数横摇运动方程，采用估算方法确定方程中的阻尼系数和复原力矩系数，数值模拟出船舶在规则波中的参数横摇情况，将上述方法具体应用于一艘滚装船船模的参数横摇预报，并与试验数据进行对比，验证了所采用方法的有效性。

When proceeding pump testing, we collect a good many parameters, and figure out the pump gross head, pump shaft power, NPSH and other parameters. Different units of those parameters are used in different countries, and sometimes the customer asks for the test data of special media. Making a test of every medium of the same pump is not realistic, and the costs will be increase, so we convert the units of the data, and figure out the testing data according to different customer's special requirements. We reduced costs and got good remarks from the corporation through the application of unit conversion technology.

水泵试验时，要采集诸多参数，并且根据这些参数计算出扬程、轴功率、NPSH等数值，不同国家这些参数采用的单位不同，企业必须能够按照客户要求的单位提供试验数据；并且有时客户要求得到水泵在特殊介质下进行试验得出的试验数据，同一台泵在每种介质下都做一遍试验不太现实，而且会提高企业的生产成本，提出将采集的数据进行单位换算，根据不同国家或者客户的特殊要求求出泵的试验数据，在实际应用中节省了试验成本，得到了企业的好评。

Taking the items of"nominal frequency" and" adjustment coefficient " as a specification, this paper provides a practical calculation method for adjusting parameters of power frequency series resonance test equipment, which has been verified both in laboratory and on site.

引入&名义频率&和&调整系数&等参数作为量化依据，提出了一种现场调整工频串联谐振试验装置参数配合的工程计算方法，并已通过了实验室试验及现场参数配合示例的验证。

Comparing the preceding three methods with the conventional method of "zero-whirl exhaust"(i.e.condition of α2 = 90 °) and Mitrosm's method for sele...

把以上三种选参数的方法和传统的以&零涡排气&(α_2=90°的条件)选参数的方法与米氏选参数的方法用数字例子进行了比较。

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。