相变点

The axially symmetric torsion of rigid circular shaft of varying diameter embedded in an elastic half space is studied by line-loaded integral equation method, where the problem is formulated by distributions of fictitions fundamental loads PRCHS (point ring couple in half space) along the axis of symmetry in interval of the shaft and is reduced to a one-dimensional and non-singular Fredholm integral equation of the first kind and is easily solved numerically.

弹性半空间；本文用线载荷积分方程法研究嵌在弹性半空间的刚性变直径圆轴的轴对称扭转。利用将"半空间的点环力偶"这一虚的基本载荷沿对称轴的圆轴区间中分布就能使本问题归结为一个一维的非奇异的Ferdholm第一种积分方程，且很易用数值求解。文中给出刚性圆锥，圆柱，圆锥柱嵌在弹性半空间的扭转的数值计算的例并和他人的已知结果相比较。

The Routh criterion of control system theory is applied to obtain the stability criterion.

通过对整流桥换相过程的分析，建立了系统在稳态运行点的微变稳定模型。

Considering the speciality of the principal reciprocal susceptibility in trigonal boracite, the experiment scheme on the measurement of the principal reciprocal susceptibility components is presented. On the basis of Curie principle, the order parameter of the antiferroelectric phase transition is investigated by taking crystal PZT, crystal SrTiO〓 and the antiferroelectric models of simple cubic lattice as examples.

针对五种特殊的具有铁电三方相的方硼盐，计算出了其铁电三方相的自发极化强度、居里温度和主倒极化率等，发现自发极化在居里点有跃变；沿极化方向的倒极化率分量是连续的，然而垂直于极化方向的倒极化率分量不连续，这是一个非常有趣的现象。

It is found that the overall heat transfer will be increased if there are more heat transfer area in the diagonal region starting from the crosspoint of two streams for crossflow heat exchanger.

在维持总传热面积不变的条件下，于叉流换热器冷热流体相交点区域，及由该点所在对角线从两侧往对角线中心区域增加局部传热面积，可改善温差场的均匀程度，从而提高效能。

Products have: NB-KR series, NBC series of carbon dioxide gas shielded welder, LGK8 Series air plasma arc cutting machine, WS Series DC argon arc welding machine, WS series IGBT inverter DC argon arc welding machine, WSE Series AC-DC pulse argon arc welding machine, ZX5 Series Thyristor rectifier arc welder, ZX6 series three-phase rectifier arc welder, ZX7 series IGBT inverter DC arc welding machine, ZXG Series rectifier arc welder, ZXE1 Series AC-DC dual-use arc welding machine, BX1 Series, BX3 series, BX6 Series AC arc welding machine, steel electroslag welding stress, pedal-style capacitor discharge spot welder, UN series of welding machine, DN Series AC Spot Welder foot, DNY Series mobile communicate spot welder, DN2 fixed pneumatic spot welding machine, D N2 fixed aerodynamic point of convex welder, CG series gas cutting machine, CNC cutting machine door, Intersection CNC EDM Series , flame brazing machine series, automatic welding machine series, MZ series automatic submerged arc welding machine, automobile manufacturing special welding equipment, robot applications, such as large family of more than 29 varieties.

生产的产品有：NB-KR系列、NBC系列二氧化碳气体保护焊机，LGK8系列空气等离子弧切割机，WS系列直流氩弧焊机，WS系列IGBT逆变直流氩弧焊机，WSE系列交直流脉冲氩弧焊机，ZX5系列晶闸管整流弧焊机，ZX6系列三相整流弧焊机，ZX7系列IGBT逆变直流弧焊机，ZXG系列硅整流弧焊机，ZXE1系列交直流两用弧焊机，BX1系列、BX3系列、BX6系列交流弧焊机，钢筋电渣压力焊机，脚踏式电容储能点焊机，UN系列对焊机，DN系列脚踏式交流点焊机，DNY系列移动式交流点焊机，DN2固定式气动点焊机，DN2固定式气动点凸焊机，CG系列气割机，门式数控切割机，数控相贯线切割机系列，火焰钎焊机系列，全自动堆焊机系列，MZ系列自动埋弧焊机，汽车制造专用焊接设备，机器人应用系统等二十九大系列百余个品种。

The phase conversion process has been discussed on the basis of three working ways of inductance loading in TEM-Ⅱtransmitter, and then several problems have been put forward.

分析了IGBT全桥变换电路实现功率变换时感性负载上电压、电流的瞬态变化规律及无功功率的释放回路，对TEM-Ⅱ型瞬变电磁法发射机阻感性负载三种工作方式的换相过程作了深入全面的讨论，进而提出几点注意事项。

Through this method,the integral gain varies with the average phase shift between tip speed ratio and power coefficient.

针对传统最大功率点追踪极值搜索法固定积分增益存在的不足，依据不同积分系数对系统的影响，提出了一种MPPT变增益极值搜索法，使积分增益随叶尖速比和功率系数之间平均相位移的变化而变化。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。