压下的

The boundary conditions and the latent heat of heat transfer system have been treated by heat-enthalpy method.

在这样的充填条件下，虽然金属压铸模的导热性很高，蓄热能力很强，但要求在压铸模型腔内获得形状完整、轮廓清晰、尺寸精度高的铸件，必须得选用合理的模具结构和压铸工艺，而压铸模具的尺寸精度和使用寿命在很大程度上取决于其在压铸过程中热应力和其产生的变形。

The impact of the press displacement of the upper roller on the forming process of BBBR was studied and it was concluded that the lengthways curvature of the spherical part is very sensitive to the press displacement under fixed distance between two lower rollers. The effeet of friction condition on the forming process of BBBR was discussed. The springback behavior of the process was analyzed preliminarily. The simulated results were validated by experiments.

研究了上辊不同压下量对其成形过程的影响，结果表明：在一定的辊间距下，压下量的变化对球形件纵向曲率影响非常敏感，探讨了不同摩擦情况对成形过程的影响，对回弹进行了初步的分析，通过实验验证了模拟结果。

Among these three types of water locking damage, the water locking under underpressure condition has the minimal damage, the damage under overpressure condition is relatively maximal, and the damage under normal pressure is relatively medial pressure is relatively medial.

研究表明，低渗透砂岩气藏的水锁伤害具有普遍性和严重性，其中欠压作用下的水锁伤害最小，超压作用下的水锁伤害最大，常压作用下的水锁伤害居中。

And eliminates pulsing, pumping action of regulator when operating at high usually

卡司凯特轴式Horus 差压型导压计，确保主压阀在巨大起伏与高压状下的性

Normally open solenoid valve, coil power after the due role of suction, dynamic core down to the Deputy valve valve plug depressed, GLOBE VALVE vice valve closed, the main valve valve cup pressure rise, when the pressure rose to a certain value, the main valve valve cup Like the upper and lower pressure, due to the role of the electromagnetic force, moving to promote the main valve core valve cup, the clamping main valve seat, the valve closed.

常开电磁阀，线圈通电后由于吸力作用，动铁芯下移，把副阀阀塞压下，副阀关闭，主阀阀杯内压力上升，当压力升到一定值时，主阀阀杯的上下压差一样，由于电磁力作用，动铁芯推动主阀阀杯下，压紧主阀阀座，阀门关闭。

Results With respect to the numbers and lower levels of the interferences within the driving source when FIT was powered respectively by the three power sources, the battery output 6 interferences, the highest power of which achieved -78.25 dBm; the linear power source output 6 interferences, the highest power of which achieved -67.11 dBm; the switching power source output 15 interferences, the highest power of which achieved -35.83 dBm.

结果：就3种电源分别供电下的激励源中的干扰的个数和功率水平而言，电池供电下的激励源中存在6个干扰，功率高达－78.25dBm；线性稳压电源供电下的激励源中存在6个干扰，功率高达－67.11dBm；开关稳压电源供电下的激励源中存在15个干扰，功率高达－35.83dBm。

In this case, we can develop roll pass scheduling program in an exact fit to the steel plant, ranging from a simple tool to a large scale Level 2 model.

在这种情况下，我们可以开发准确适合某个特定轧钢厂的轧制压下规程软件，从简单的压下规程程序，到大规模的二级系统。

In the condition of non-manufacturing housing structure, the original electrical screw-down mechanism is replace by a long-stroke cylinder and the gauge automation control system is applied into rolling adjustment.

在对牌坊不进行加工的情况下，将机械式的电动压下改为长行程的液压压下，将C形钩换辊改为液压小车换辊，并对自动控制系统进行全面的升级改造。

The results show that:(1)the low-noise source-follower circuit can be effectively used to measure the output of PVDF thin film;(2)the piezoelectric coefficient D33 of the PVDF is very sensitive on temperatures;(3)the value of D33 intensively fluctuate in initial loading stage,this means that a pre-load is needed in practice application to keep a constant piezoelectric coefficient D33 of the PVDF;(4)when the compressive load is imposed on the surface of the PVDF along a incline direction,D33 value is obvious changed with changing incline angle,and(5)the frequency bandwidth of the PVDF thin film is very wide,it is more suitable to measure strike or impact loading at various loading conditions.

结果表明：(1)低噪声源跟随电路可有效测量PVDF 薄膜输出；(2)PVDF压电薄膜的压电系数D33对温度很敏感；(3)D33值在加载初始阶段波动很大，所以实际应用中应给PVDF提供一个预压载荷，以确保有一恒定的压电系数D33；(4)当压载荷沿倾斜方向作用在PVDF 表面时，由于有剪切力作用，D33 值会随着倾斜角的变化发生显著改变；(5)PVDF 薄膜具有很宽的频响，更适用于测定不同载荷条件下的侵彻或冲击等动态载荷。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通过对岩层移动的现场观测，建立了&两硬&条件综放采场台阶悬臂—悬臂梁组合的煤岩组合结构力学模型，并以此煤岩结构为基础，建立&两硬&条件综放采场顶煤压裂的有限元数值模型，分析了坚硬顶板不同来压步距对坚硬顶煤的压裂效应，并确定了合理的支架阻力，从而对坚硬顶板进行有效的控制，消除坚硬项板对采场的冲击隐患，同时保证采场矿压对坚硬顶煤的有效压裂，达到提高顶煤回收率之目的，由此形成了坚硬顶煤、坚硬顶板条件下综放采场围岩控制的基本理论和方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。