中轴

Basing on electromagnetism theory characteristic of light wave, the formula of the relation of refringence e light is inferred under any axis location and any angle, when it is refracting.

基于平面光波在晶体中传播的电磁理论特性，推导了光波在晶体表面折射时，双折射光波中e光线透过晶体出射点的位置受到任意光轴取向、任意入射角影响的关系式；利用MATLAB对关系式进行了数值计算分析，绘出双折射e光与任意光轴取向、任意入射角关系曲线，并给出了对应的定量关系式；实验验证了该公式是正确的。

For the capacity of propeller turbine is often small, people pay little importance on the transformation of reducing capacity under specified conditions. So, nowadays little research mentioned above has been developed.For the particularity of the designed factors, the author has improved the traditional theory, and has fined an available Method of singular point distribution. At present, no one has developed CAD hydraulic design software of lower specific speed axial flow runner in our country.

由于设计条件的特殊性，在研究设计方法过程中，论文基于传统设计理论，对引用的一些基本规律做了一定改进，在具体设计过程中，对经验参数的选择方法做了一定探索，研究与探索运用奇点分布法设计低比转速轴流式转轮叶片；传统的设计工作全部由人工完成，无法满足当今社会科技生产发展的需要，因此论文开发了一套具有人机对话界面良好特点的低比转速轴流式转轮CAD软件。

Regarding the frequent occurrence of speed stalling of boiler axial flow primary fan in the operation of 600 mw unit in china,the cause of speed stalling was analyzed based on the actual measured data.the problem is mainly caused by primary air pipe resistance property variation,which caused the excessive opening of movable blades,the primary fan is working on the condition of higher wind pressure and lower flow.the approaches to reduce the speed stalling of primary fan and preventive measures are put forwa...

针对目前国内600 mw大容量机组锅炉轴流式一次风机运行中失速事故频繁发生的问题，在了解造成轴流式一次风机失速原理的基础上，根据实测数据对一次风机失速原因进行分析。主要原因为一次风管阻力特性的变化，使一次风机动叶开度过大，一次风机工作点处在高风压区低流量的工况点，是造成一次风机失速的主要原因，提出了运行中减少一次风机失速机率的处理方法及预防措施。

In the practical power system operation,the powers of generators and loads are changing constantly,and the state variables e.

实际电力系统运行中，发电机和负荷的功率随时都在变化，发电机中各状态变量和代数变量(交轴、直轴的电压和电流等)分布在一定范围内。

A heavy duty tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, the bead core with an aspect ratio (HC 1 /WC) of from 0.43 to 0.58, and a carcass comprising a carcass ply of cords extending between the bead portions and turned up around a bead core in each bead portion from the inside to outside of the tire so as to form a pair of turnup portions and a main portion therebetween, the turnup portion comprising a turnup main-part extending along an axially inner surface, a radially inner surface and an axially outer surface of the bead core smoothly, and a turnup sub-part extending from the turnup main-part toward the main portion near the radially outer surface of the bead core.

本发明公开一种重载轮胎，包括：胎圈部分；一对胎侧部分；一对胎圈部分，每个胎圈部分中具有一胎圈芯，所述胎圈芯的高宽比(HC1/WC)在0.43到0.58范围内；以及胎体，其包括胎体帘布层，该胎体帘布层的帘线在胎圈部分之间延伸并且绕每个胎圈部分中的胎圈芯从轮胎内侧卷绕到轮胎外侧，而形成一对卷起部分以及位于该对卷起部分之间的主体部分，卷起部分包括沿胎圈芯的轴向内表面、径向内表面以及轴向外表面平滑延伸的卷起主部以及邻近胎圈芯的径向外表面而从卷起主部朝主体部分延伸的卷起子部。

Results: IVUS revealed that the cross-section views of coronary artery IMH appeared as a homogeneous, hyperechoic, crescent-shaped or circular area within media or between media or EEM, and the long axis views of IMH presented unbent or tortuous homogeneous space-occupying lesions with varied length.

结果：IVUS显示不冠状动脉壁内血肿的短轴观呈新月形或环形，呈等于或稍强于血液的斑点状回声，长轴观显示为中膜内或中膜与外膜之间长度不等的占位，形态或直或扭曲，呈接近血液回声或稍强回声。

The rebuilding of universal joint for 3200mm four-high roughing mill is introduced and analyzed in this paper.

本文介绍了中厚板厂3200mm四辊粗轧机万向联轴器的改造过程，并对其进行分析，这对于提高中厚板轧机万向联轴器的承载能力具有重要意义。

The distribution of gear's contact stress, root stress, and contact engagement line in the engagement situation of gear pairs, were obtained on the base of explicit integration method. 3. Adopting the method of system matrix, the torsional vibration differential equation of general shafting was gained. The simple harmonic forms of excitation torque under the normal combustion or piston flameout of in-line engine and v-type engine were analysed. The decoupled algorithm of free vibration and forced vibration and the solution to the vibration damper's energy of resistance and the off-resonance calculation were studied. The sensitivity formulations of the natural frequency and vibration mode to physical parameters of system were derived by solving the eigenvalue problem. These sensitivity formulations provided the theoretical base for the dynamic modification of structure.

运用系统矩阵法建立了轴系的扭振微分方程，并对直列和V型发动机在正常发火和气缸熄火工况下的激振力矩进行了详细的简谐分析；基于精确方法推导了自由振动和强迫振动的解耦算法，给出了能量法计算中的减振器阻尼功求解和非共振计算方法；并研究了曲轴系扭振非线性分析中的变惯量问题，得到了单缸转动惯量的精确求解公式以及变惯量和固有频率的关系式；最后，从特征方程和振型正交性出发，推导了固有频率和振型对轴系转动惯量和刚度等物理参数的灵敏度，为扭振系统的结构动力学修改提供了理论基础。

This paper is also concerned with the nonlinearity measure of the PKM, which depend upon differential geometry curvature. The nonlinearity can be reflected by the curving of the solution loci and the equal interval input of joints mapping into inequable interval output of the end-effector.

从而解决了PKM设计中根据进给能力需求优化结构参数、确定关节伺服轴极限转速，以及在数控编程中由机床结构参数、关节伺服轴极限转速和加速度评价刀具进给能力的软极限的两类互逆问题。

Orebodies occur in a fault near the axial region in the southern limb of the Jinjinghe-Hujiamiao inverted secondary anticline in the southern limb of the Hongyansi-Heishan composite syncline. Host rocks are dolomitic rocks in the middle and upper parts of the Devonian Qingshiya Formation. Their spatial distribution is obviously controlled by an interlayer fracture-fissure zone near the axial region in the steeply dipping southern limb of an anticline. Ores are dominantly of nodular and stockwork types and the feature of epigenetic mineralization is very pronounced.

矿体产于红岩寺—黑山复式向斜南翼金井河—胡家沟次级背斜南翼近轴部断裂中，赋矿岩石为泥盆系青石垭组中上部白云质岩，其空间展布明显受背斜陡倾南翼近轴部的层间断裂-裂隙带构造控制，矿石主要有团块状和网脉状，其后生成矿现象非常明显。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。