It indicates that the method is effective that the leakage loss of water in Douhe Reservoir distinctly decreases after the abutment is repaired. 根据计算对主要渗漏进行了进一步治理,水库漏水量明显减小,说明该方法是有效的。
In order to divide the space between rotating parts and quiescent parts in micro gas turbine, the labyrinth seals are used to decrease the leakage loss. 为了将旋转部件与静止部件之间不同压力的空间隔开,微燃机中采用了气封装置以减少泄流量。
Mixed flow compressor achieves better performance and lower tip leakage loss, and flow field at outlet is more uniform in mixed flow impeller than centrifugal impeller. 计算结果表明在高比转速情况下,斜流叶轮有利于减弱叶尖泄漏损失,改善叶轮出口均匀性,提高叶轮效率和级效率。
A Study on the Dynamics Characteristics of the Three-dimensional Flow Field and the Leakage Loss Features of a Centrifugal Fan 离心风机三维流场动力学特征和泄漏损失特性研究
The scroll height has a range that can decrease frictional loss power and leakage loss power. 在Ps、ε、Vs、n、t一定的条件下,涡旋齿高度h有一个使动涡盘上的摩擦损失功率和动、静涡盘间的泄漏损失功率均较小的取值范围。
Use of Auto-control Valve for Controlling Leakage Loss in Water Supply Network 应用自控阀控制给水管网漏损的研究
The power loss in barrel-plunger pair occurring on the upstroke of a subsurface pump is comprised of leakage loss and friction loss. 抽油泵上行程提液时柱塞副功率损失包括漏失损失和摩擦损失。
Based on the testing-hole experimentation, this paper studied on the transformation process, leakage loss of the rice field water nitrogen in Shanghai. 通过测坑试验和人工降雨试验,研究了上海地区稻田水中氮素的变化动态和渗漏、径流流失规律。
Study on the Friction Loss and the Leakage Loss of a Scroll Compressor 涡旋压缩机摩擦损耗和泄漏损耗研究
Change of phosphorus and nitrogen concentration in the leakage loss. 渗漏流失氮磷浓度的变化。
A new numerical method based on point-matching is presented to calculate leakage loss of cutoff fundamental mode in W-tunneling optical fibers. 给出了一种新的数值计算W型单模单偏振光纤截止基模能量损耗的方法&区域模场边界条件匹配法。
The leakage loss of methamidophos was more than that of fenvalerate. 渗漏流失甲胺磷大于氰戊菊酯。
Downstream rotor-stator interaction increases the unsteady fluctuating intensities of the rotor tip clearance flow and the tip leakage loss. 下游静叶干涉增加了动叶顶部间隙流的非定常波动强度和泄漏损失。
The results indicate that the nitrate-N leakage loss under the root zone caused by fertilizer irrigation could creat the pollution of shallow groundwater in Tangshan agricultural area. 计算结果表明,唐山农业区灌溉施肥引起根区以下硝态氮渗漏损失可造成浅层地下水的污染。
All irrational fertilization treatments facilitate leakage loss of N, P, and K nutrient. 不合理施肥措施均会促进河沙泥和红黄泥土壤氮素、磷素、钾素养分的渗漏损失,尤以化学肥料的不合理施用更甚。
Numerical Calculation and Analysis of Leakage Loss in a Scroll Expander 涡旋式膨胀机泄漏损失的数值计算与分析
Designer initiatively considers the way of buried long-distance water conveyance conduits, because it can be built in any geography without particular requirement for geology condition, and it has advantages in small water leakage loss, simple construction, lower cost, convenient for management and operation. 埋地长距离管道输水方式因其地质条件要求不高,可随一定地形铺设,输水渗漏损失小,施工简单,造价较低,管理运行方便等优点,为设计者优先考虑。
A Finite Difference Method with a PML Boundary Treatment and Its Application to the Calculation of the Leakage Loss of an Optical Waveguide 基于PML边界的有限差分法及其在光波导泄漏损耗计算中的应用
Increasing the application rates of organic fertilizers and reducing chemical fertilizers had no remarkable effects on yields of the rice but could reduce N leakage loss largely, which was an effective measure to abate agricultural non-point source pollution and protect the groundwater. 经测产,增施有机肥而减少化肥用量对水稻产量没有显著影响,但在很大程度上减少稻田氮素的渗漏流失,对减少农业氮素面源污染、保护地下水具有重要意义。
The result showed that the leakage loss and the friction loss were related to the pressure difference between, the size of gap, the circumference velocity, etc. 研究结果表明:压差、间隙宽度、进口圆周速度,间隙长度等因素均对容积损失与圆盘摩擦损失有影响。
Further analysis showed that the improvement comes from the reduction of friction loss and leakage loss. 分析结果表明,采用陶瓷-金属梯度功能材料可显著改善发动机的耐磨性、润滑性和密封性,从而明显降低发动机的摩擦损失、漏气损失和漏气量。
MFLA increased with the increase of planting density, but due to planting density much larger, transparent coefficient for radiation penetration was small, lead to light leakage loss in latter period. 随着密度增加平均叶倾角变大,株型紧凑,但密度过大,群体直射辐射系数小,冠层结构不良,造成生育后期漏光损失严重。
By solving the model, optimum open degree is attained to balance the pressure of water supply network and abate the probability of leakage loss and pipe burst, availably maintaining water supply safety. 通过求解上述模型,得到管网中各自控阀的最优开启度,从而均衡管网压力,减少管网漏损及发生爆管的几率,有效维护管网的供水安全。
With the strengthening of the internal combustion engine energy saving regulations, more and more attention has been paid to the leakage loss of an internal combustion engine. 随着内燃机节能减排法规的强化,内燃机的泄漏损失也越来越受到关注。
The reversing valve loss includes three parts: refrigerant leakage loss from high-pressure side to low-pressure side, pressure loss caused by the flow resistance of irregular flow passage, and heat transfer loss from high-temperature side to low-temperature side/ environment. 四通换向阀的损失包括四通阀内部高压侧制冷剂向低压侧制冷剂的泄漏损失、四通阀内部不规则流道产生的流动阻力压降损失、高温高压侧向低温低压侧及环境的传热损失三部分。
The main leakage channel and leakage model of working fluid was discussed. Then the friction loss model and leakage loss model was established. 讨论了常规工质双转子膨胀机的主要泄漏通道及泄漏模型,并建立了膨胀机的摩擦损失模型与泄漏损失模型。
Several different optimization methods was introduced for controlling corresponding loss including profile loss, tip leakage loss, corner separation loss and seal leakage loss. 对主流区二维叶型损失,叶顶间隙泄漏损失,角区分离损失以及气封间隙泄漏损失采用不同的方法进行有针对的优化。
Moreover, the modal birefringence increases greatly as compared with the original PCF, and the leakage loss is about 104 times smaller than that of original PCF because the modification gives rise to the strong confinement of modes. 此外,双折射度比起初的光子晶体光纤大了很多。并且由于改进后对模场的限制增强,光纤的损耗比起初光子晶体光纤小104倍。