压下的

It is an unilateralism-transforming device, which can dispart high import voltage when inputting and outputting by tums, and outputs low voltage of direct current.

直流分压器是一个单向传输的器件，在输入、输出交替进行的条件下，它能将输入的高电压实行分压，以直流低电压输出。

This paper analyzes the effect of gravity head on different forms of low temperature hot water heating system common riser, by using Kirchhoff s law analyzes downfeed and upfeed two-pipe system s hydraulic balance status.

本文分析了重力作用压头对低温热水计量采暖系统共用立管形式的影响，通过运用基尔霍夫定律分析了下分异程式双管系统和下分同程式双管系统的水力平衡状况，得出了下分异程式双管系统更适用于低温热水采暖系统的结论，并确定了立管经济比摩阻的范围和下分异程式双管可以负担的楼层数。

The molecular parameters for 18 refrigerants were obtained by fitting saturated vapor pressure and liquid molar volume data. The overall average deviations of saturated vapor pressure and liquid molar volume were only 1.11% and 0.92%, respectively.

通过关联不同温度下制冷剂的饱和蒸气压和液体体积得到了18种纯制冷剂的分子参数，新方程计算的饱和蒸气压和液体体积总的平均偏差分别为1.11％和0.92％。

The simulation results prove that the new structure can reduce the turn-off time by more than 75%compared with the normal one under the same breakdown voltage and on-state performance.

理论分析和模拟结果证明，该结构在击穿电压、导通损耗不变的情况下，能将关断时间减少75％以上。应用这样的结构只需增加两个分压比一定的分压电阻。

The trend of intranasal pressure drop at different airflows measured by CFD model was the same as that measured by rhinomanometry, while the transnasal pressure obtained by CFD model was lower than that recorded by rhinomanometry.

CFD模型计算各流量下鼻腔压降变化与鼻阻力计测量得到的压力-流量分布曲线的变化趋势一致，但压降值前者小于后者。

Methods: Under peridural anesthesia, the right rectus incision was adopted. First, the vessels in lesser curvative of stomach was amputated and ligated. Second, splenic artery was ligated to deflate spleen .Then ,splenic artery and renal vein were amputated and side-to-side anastanosised with each other. Result: Of the 36 cases,the portal free pressure decreased by different degree in 23 cases, unchanged in 10,and increased in 3 postoperatively. The follow-up ranged from 1 to 5 years.

在硬膜外麻醉下经右腹肌切口进腹、采用先作胃小弯的血管彻底离断，再结扎脾动脉、使脾脏缩小后，而后分离出脾静脉和肾静脉进行端侧吻合，结果：36例中23例病人吻合后测得门脉自由压均较分流前有不同程度的降低，10例门脉自由压未变化。3例高于分流前压力。

The intermediate frequency elbow piece formation technology basic technological process is: First welds a lateral section is the polygon many leng link shell or both sides seal many leng fan-shaped shells, after the interior flushes the full pressure medium, the serve intrinsic pressure, under the intrinsic pressure function the lateral section by the polygon gradually changes a full circle, ends in a circular link shell.

中频弯管成型技术基本工艺过程是：首先焊接一个横截面为多边形的多棱环壳或两端封闭的多棱扇形壳，内部冲满压力介质后，施以内压，在内压作用下横截面由多边形逐渐变成圆，最终成为一个圆形环壳。

Field trials on the effects of the convertional tillage, no-tillage and subsoiling methods, 4 residue coverages (0, 25 yc, 50%, 75 %) and tractor wheel compaction on water conservation are conducted for wheat crop yield by using rainfall simulation.

在模拟降雨条件下研究小麦地的传统、免耕和深松3种耕作措施和0，25％，50％和75％4种覆盖度以及拖拉机轮胎压实与非压实对土壤水分保护效果的影响。

LiNi0.95Mg0.05O2 could be formed with I(003)/I(104) ratio 1～1.1, R-factor I(006+I(102)/I(101) ratio 0.67～0.94, and (108)/(110) splitted peak, c/a ratio 4.914～4.925, in R3m space group under the conditions of 210~280 MPa pelletized powder, heating rate 2℃/min to precalcined temperature 600℃ for 9～15h,crushed and repelletized, heated till 600℃ in 5℃/min, then switched to 1℃/min till 750℃ isothermally for 15～20h all in oxygen flow.

发现以210～280 MPa对试样压片，在氧气气氛下经2℃/min升温速率升温至600℃，预烧9～15h后，再粉碎、压片以5℃/min升温至600℃之后以1℃/min升温至750℃恒温15~20h，可得I(003)/I(104)峰比值1~1.1，R-factor I(006+I(102)/I(101)峰比值0.67~0.94，并且有(108)与(110)的分裂峰，同时c/a比值4.914~4.925，属于R3m空间群的锂镍镁氧化合物。

Under the conditions that water is incompressible, the plate vibrates in small amplitude and the modal deflection in water equal approximately that in vacuo. The addes mass density due to water pressure is expressed using Rayleigh's integral.

在假定流体不可压、方板作小振幅振动、水中模态挠度近似为真空模态挠度的条件下，利用瑞利积分得到了因流体压而引起的附加质量密度。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。