Evaluates and compares the workshop performance by velocity asymmetry coefficient ku , temperature asymmetry coefficient ki , the age of air , the temperature efficiency 77 and pmv - ppd index 厂房内的气流组织采用速度不均匀系数k _ u 、温度不均匀系数k _ t 、能量利用系数、空气龄、 pmv - ppd指标进行综合评价和对比。
The r esults demonstrated that sprinkler efficiency , defined in this article , varied i n a range of 0 . 64 0 . 86 , increasing with sprinkler uniformity but decreasing wit h wind speed 试验结果表明，在北京地区冬小麦生育期内，喷洒水利用系数的变化范围为0 . 64 0 . 86 ，利用系数随喷灌均匀系数的增大而增大，随风速的增大而降低。
The maximum transmission efficiency of two - stage three - ring gear reducer is 93 % , and the load distribution non - uniform coefficient is less than 1 . 1 , and its vibration acceleration is less than acceleration of ordinary three - ring gear reducer that has the same properties 该两级三环减速器的传动效率达93 %以上，载荷分配不均匀系数小于1 . 1 ，振动加速度值也小于同等传动能力的一般三环减速器。
Brings forward the basic network cell model of symmetrical blast vault and asymmetric blast vault . then studies and analyses airflow in vault of main voltage switchyard hall of xiluodu hydropower station which is far cry and large numbers of airflow conflux , brings forward concept of “ virtual embranchment ” and corresponding basic network cell model , regresses calculate expressions of flux uniformity coefficient and impedance of “ virtual embranchment ” of vault of main voltage switchyard hall of xiluodu hydropower station 而后又采用cfd数值模拟的方法对溪洛渡水电站主变洞排风拱顶这种多股气流汇流的长距离通道内的气流流动进行了分析,提出了“虚拟分支”的概念和相应的网络基元模型,并回归得到了溪洛渡水电站主变洞排风拱顶各个排风“虚拟分支”风量均匀系数以及阻抗的计算公式。
This dissertation ' s problem just comes from this engineering background exactly . for this two kinds of cores , which were taken from the engineering place , this dissertation draws sample by computer and analyses the weight distributions , getting the weight curves , the middle weights , asymmetry coefficients and other physics characteristic indexes of them , and makes up the model samples which are similar to the factual weight distributions 本文对施工现场采用的10 100kg和1 800kg重量范围的堤心石进行了随机抽样和重量级配分析，得到了描述这两种堤心石类别的重量级配曲线、中值重量、不均匀系数等物理特性指标，并由此制备重量级配相似的模型样本。
According to thermal state similitude model experiment of the langya mountain hydropower station , we adopt different velocity of air ventilation and exclude air proportion of upriver and downriver , this paper contrast the air distribution of the dynamo floor on each method , and educe the best projects of arch crest supply air that adapt to langya mountain hydropower station ’ s dynamo floor : g = 17 . 4 10 ~ 4m ~ 3 / h , 22 vents , d = 600mm , the scale of volume 1 : 3 , t0 = 16 . 9 . it ’ s also thought that improved any side of volume can reduce its temperature . when study on the air supply of langya mountain hydropower station ’ s underground dynamo floor by cfd software , it proved that cfd software is correct when compare with model experiment . when arrange the number of 5 kinds of vents , it concluded that the number of vents 14 to 22 , it can ’ t change velocity , in 36 to 40 can lead to reduction of velocity . when vent in 14 to 36 , the parameter kt doesn ’ t change , when the number is as large as 36 , kt reduces 在此基础上,模拟了5种风口布置方案和送风量的改变对发电机层温度场和速度场的影响,获得了些可供参考的结论:在风量和送风速度不变的条件下,风口个数在( 14 ~ 22 )小范围变化时,工作区平均风速基本不变,大幅度增加风口个数( 36 ~ 44 )就会导致工作区平均风速的降低,风口数在14 ~ 36之间对工作区的温度不均匀系数影响不大,当风口数> 36时,温度不均匀系数随着风口数的增多而变小,速度不均匀系数一直随着风口数的增加而减少;在风口布置和尺寸不变的情况下,送风量变化时,工作区平均温度随送风量增大而降低,平均温度的降低量逐渐趋于减少,能量利用系数先是随着送风量的增加而增大,后随送风量增加而减少。
Third according to the practice , over 300 g / m2 of the staple nonwoven geotechnical fabric is used in the bank project of the large rivers , its tensile strength is 600 n / 5cm . forth the filtration under the traffic load , normally , the traffic load is repeated load and fast movement . in this case , thick filtration is applied , such as sand and / or thick fabric , of which weight is over 700 g / m2 研究结果表明：对d _ ( 85 ) 0 . 074mm的土料，不宜采用土工织物作滤层；对级配极不均匀的土壤(不均匀系数cu 2或cu 6 ) ，在渗流作用下，很容易发生管涌，对土工织物的选用要慎重；一般大江大河的护坡工程至少应采用300g m ~ 2以上的短纤无纺土工布，其抗拉强度为600n 5cm左右。
Based on vibration principle , the paper establishes dynamics analysis model of output shaft with elastic support , according to fourer series spread principle of periodic function , the dynamic response formula is derived by separating complex vibration force into sum of many simple harmonic excitation function of whole number times frequency relations . the result shows that response of both sides support is synchronous when load distribution non - uniform coefficient is 1 依据振动理论建立了具有弹性支撑的输出轴的动力学分析模型，根据周期函数的傅里叶级数展开原理，将复杂的激振力分解成为多个频率成整倍数关系的简谐激励函数，导出了动态响应表达式，结果表明，当载荷分配不均匀系数为1 . 0时的输出轴两端支撑同步。
When the punched baffle is proper in length , the small holes are in staggered arrangement and the punched ratio gradually increases from the central axis to the boundary along the baffle length , the performance of flow distribution in the plate - fin heat exchanger is effectively improved by the optimum design of header configuration 从实验对比分析中得出，当挡板小孔呈错排分布、开孔率沿挡板的中轴线向两侧逐渐增加、且总开孔率达到50 %左右的时候，在相同的入口条件下，不均匀系数由原始封头的1 . 210降至0 . 209 ，最大流速与最小流速之比由23 . 163降至1 . 756 。
The results show that , compared with cwq coke , the properties of cdq coke is much better in mean grain size , grain size uniformity , mechanical strength , thermal properties etc . , the ash content , catalytic index ( mci ) , optical texture index ( oti ) etc . are unchanged basically , and its alkali absorptance is strong , alkali resistance is weak , but its thermal properties are still superior to cwq coke after alkali absorption , its boron absorptance is weak , passivetion effect is bad , thus its thermal propetties is somewhat inferior to cwq coke after boron absorption 研究结果表明：与湿法熄焦焦炭相比，干法熄焦焦炭在平均粒度、粒度均匀系数、机械强度、热性能等方面均有明显改善；灰成分催化指数mci 、光学组织指数oti基本不变；而吸碱能力强，抗碱能力弱，但是吸碱后的热性能仍优于湿法熄焦焦炭；吸硼能力弱、钝化效果差，钝化后干法熄焦焦炭的热性能稍低于湿法熄焦焦炭。
