栅压

The test finished in plan cascade wind tunnel in GTE got the frequency spectra of vortex shedding in all kinds of work condition, and realized unsteady cooperative flow type by method of sound excitation.

在中国燃气涡轮研究院完成了全部叶栅吹风实验，获得了某种扩压叶栅叶片表面旋涡脱落频谱随来流工况变化的规律，并通过声激励的手段在国际上首次捕捉到了新一代"非定常耦合流型"。

The compaction effect of geogrid with marlite method, soil bag with marlite method, replaced backfilling clay method, which were used in the swelling rock slope of the Luwangfen test Region of middle-route of South-to-North Water Transfer Project were studied on the different conditions.

比选、研究了在不同碾压机具、铺土层厚、碾压遍数等条件下，土工格栅＋泥灰岩开挖料、换填黏性土料、土工袋+泥灰岩开挖料等三种不同处理措施的压实效果。

The influence of tailboard on the exit flow fields of compressor cascades with normal straight, positive and negative curved blades were investigated at zero incidence.

进行了带尾板的常规直叶片、正弯曲叶片、反弯曲叶片组成的三种矩型压气机叶栅在低速风洞上的实验研究，测量了叶栅出口流场，分析了零冲角下尾板对叶栅出口能量损失分布情况和二次流速度矢量的影响。

The experiment was investigated on the exit flow fields of compressor cascades with normal straight, positive leaned, positive curved, negative curved, and S type curved blades with tailboard at zero incidence.

进行了带尾板的由常规直叶片、正倾斜叶片、正弯曲叶片、反弯曲叶片、S形叶片组成的 5种矩型压气机叶栅在低速风洞上的实验研究，测量了叶栅出口流场，分析了零冲角下不同叶片弯曲形式对叶栅出口总压损失分布情况和主流速度的影响。

Numerical simulation to three-dimensional turbulent flow in multistage axial compressor blade row is carried out, where high resolution third-order ENN scheme is adopted to catch the shockwave and simulate the turbulent flow correctly, and LU-SGS implicit method is chosen to improve computation rate. A nicety and high efficiency numerical simulating system is thus constructed.

对多级轴流压气机叶栅内三维紊流流场进行数值模拟，采用高精度高分辨率的三阶ENN格式以保证对激波的捕捉和对紊流特征的正确模拟，利用LU-SGS隐式解法提高了计算速度，从而构成了一种既准确又高效的多级跨声速轴流压气机紊流流动数值求解系统。

This paper develops a RF analog predistorter by utilizing the gate-voltage controlled variable resistance characteristic of FET when it biased in a variable resistance zone. The predistorter also offers certain gain while linearizes the amplifier.

本文利用场效应管偏置于可变电阻区时的栅压控制变阻特性构成模拟射频预失真器，在对放大器线性化的同时还可提供一定的增益。

Experimental investigation on strongly separated flow in an annular compressor cascade ;2. The structures of separated flow, especially, vortices, inside an annular compressor cascade at large incidences have been studied baized on the flow visualization images obtained by means of Laser-sheet method and 7-hole probe measurement.

本文采用激光片光层加示踪粒子流场显示技术，观察和摄取了环形压气机叶栅在约十14大攻角下的内部流动图像；采用七孔气动探针测量了叶栅出口截面上的速度分布S通过对流场实验结果的分析，并结合本文第一部分中得到的叶片近壁区分离流结构，得到了该环形压气机叶棚中严重分离流场的分离流形态和旋涡结构。

A high device linearity,high transconductance over a large gate voltage swing,high current drivability are found in DH-PHEMT.

因此，DH-PHEMT器件具有更好的线性度，在较大的栅压范围内具有高的跨导和更大的电流驱动能力。

Results show that the performance of this VCRT basically reaches the original objective,which indicates that a convergent-divergent blade passage in the high pressure rotor and a convergent-divergent meridian plane of the VCRT are suitable for the VCRT.

结果表明，对转涡轮各方面性能基本达到了设计目标，说明高压动叶采用收扩型叶栅通道且整个涡轮子午流道也采用收扩结构的设计可以获得满意性能；三排叶片仍有改进余地，即涡轮效率还有进一步提升的潜力；高压动叶出口沿整个叶高均为超声速，出口马赫数节距平均值在1.4~1.6之间；高压动叶尾缘斜激波强度以中展为中心向两侧递减；涡轮性能随出口背压的增加而下降；涡轮出口背压的变化对高压转子性能基本没有影响，但对低压转子性能的影响较大。

Cascade internal flow field is calculated and analysed based upon NACA series blade profile with different running incidence.

戴韧应用有限元方法求解不可压黏性流动N-S耦合方程，对NACA叶型的叶栅在不同冲角的条件下，叶栅内部的流动作了较为完整的计算分析。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。