截面线

Considered the inside and outside contour line was Archimedes spiral in the cold rolling, the forming law of rectangular cross sectional rings has been studied. And the more precise geometrical models and calculation models have been gained. The researches can be used as a theoretical and experimental foundation for the simulation of ring rolling process. At the same time, the results of theoretical analysis have a good agreement with the results of practical rolling production.

本文在考虑冷轧过程中环件的内外轮廓线均为阿基米德螺线的情况下，对矩形截面环件的轧制成形规律进行了研究，得到了较精确的几何模型和计算模型，为环件轧制过程的模拟提供了理论依据和实验依据，同时理论分析的结果与实际轧制生产过程中的结果有较好的吻合。

Enterprises to adopt advanced production equipment and testing equipment, has automatic variable cross-section mill CNC, automatic volume headphones, automatic CNC Control Step-by-step heat treatment furnace, hardening machine, stress shot peening machines, automatic assembly line, electrostatic spray lines, etc.; with professional Physicochemical room and laboratory, equipped with polishing machine, vertical metallographic microscope, spectrophotometer,¨furnace, carbon and sulfur analyzer United, fatigue tester, stiffness tester, high-arc machine Rockwell Hardness Tester and a full range of advanced testing equipment.

企业采用先进的生产设备和检测设备，有全自动数控变截面轧机、全自动卷耳机、全自动数控步进式热处理控制炉、淬火机、应力喷丸机、全自动组装线、静电喷漆线等；设有专业的理化室和试验室，配备抛光机、立式金相显微镜、分光光度计、定碳炉、碳硫联合分析仪、疲劳试验机、刚度试验机、弧高分选机和洛氏硬度计等先进齐全的检测设备。

Rinted-circuit board air-core coils designed by using CAD tools and fabricated by adopting advanced PCB manufacturing technology are good in measurement accuracy and consistence of products parameters. But the characteristics of limited turns-density and large magnetic induction intensity grads on coil cross-section make great influence on the continuous uniform distribution of coil turns along the coil circumference and cause its discrete distribution.

CB空心线圈采用CAD方法设计和先进的PCB加工工艺制造，具有很好的测量精度和参数一致性，但是，线匝密度较小，而且截面上磁感应强度梯度较大，从而影响了线匝沿圆周均匀分布的连续性，使其具有了离散分布特征。

This thread combined laevogyrate thread and dextral thread together in the same part of the thread.

发明了一种新型螺纹—唐氏螺纹，这种螺纹采用的是变截面非完整螺纹，并且将左旋和右旋螺旋线复合在同一段螺旋线上，具有左、右放螺纹的特点，可分别与左、右旋螺纹配合。

It is shown that although statistical distribution of relative velocity between two atoms has no impacts on the line shape of LICET spectrum, it has certain impacts on the peak value of collision cross section.

分析表明，两原子之间相对运动速度的统计分布虽然不影响激光感生碰撞截面的谱线线型，但对碰撞截面的峰值大小有一定的影响。

The coefficients of load distribution along the contact line of pitch position in axial middle section are obtained.

应用它计算了六对齿轮在不同接触线上的载荷分布，得出齿轮在轴向中间截面节点位置啮合时接触线上的载荷分布系数，分析了轮齿刚度的变化规律，给出轮齿刚度的简化计算公式。

The current capacity of Heat Resistance Aluminum Alloy Conductor is about 50% higher than that of ACSR in the same sectional area.

与同截面的普通钢芯铝绞线相比，耐热铝合金导线150℃时的载流量比普通钢芯铝绞线载流量提高50%以上。

In the region upstream of vortex breakdown, the sectional streamlines emanating from the leading edge spiral inward to primary vortex and in the region downstream of the breakdown, on the other hand, the streamlines separating from the leading edge are not entrained into the vortex core in the instantaneous sense. Along the axis, the topology of the primary vortex alters several times starting from stable focus near the apex to unstable focus, and lasts back to stable focus near wake edge, the stable hmit cycle and unstable limit cycle are shown in this evolution.

发现在截面流线谱中，即使奇点的类型、数目及位置相同，奇点的连接方式也有可能不同；旋涡破裂点前，主涡由来自前缘的力线卷绕而成，主涡焦点与前缘半鞍点相连，旋涡破裂后，来自前缘的力线不再卷入主涡，主涡焦点与对称面上的鞍点相连：在流体由翼尖流向后缘的过程中，截面流线谱的拓扑结构发生了多次变化，主涡焦点相继由稳定状态转变为不稳定状态，最后又转化为稳定状态，并先后出现了稳定的极限环及不稳定极限环。

During the research and fabrication, many problems encountered, especially principle tests, design of mechatronics system, synchronal control between press (cross-section correction) feeding and preforming/bending feeding and damped oscillation have been solved.

利用绕线机这套硬件设备和CICC超导磁体绕制技术的研究成果，发展了复杂截面铠装超导缆导体线圈的无张力绕制技术；确定了D形线圈的绕制工艺和NC控制程序，最终高质量地完成了复杂D形截面CICC纵场试验线圈的研制。

After carries on the load computation and the component section estimate, selected a pin frame to carry on the computation, the computation content including the frame beam column section size selection and the line rigidity computation; Dead load, live load, under earthquake function Liang Duan, column end moment, shearing force computation; Frame endogenic force combination; The frame beam column matches the muscle computation; The staircase matches the muscle computation and the foundation matches the muscle computation.

在进行荷载计算和构件截面估算后，选取了一榀框架进行计算，计算内容包括框架梁柱截面尺寸的选取及线刚度的计算；恒载、活载、地震作用下梁端、柱端弯矩、剪力的计算；框架内力组合；框架梁柱配筋计算；楼梯配筋计算及基础配筋计算。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。