区时

There is important significance for guiding preventing and putting out fire and safety production that marking off danger zero of coal spontaneous combustion in goaf exactly and doping coal burning period and the distributing chart of high temperature spot.

准确的划出采空区浮煤自燃的危险区域，预测出回采时，煤自燃的发火期及高温点的分布，对指导煤矿防灭火和安全生产具有重要意义。

The molecular motion of amorphous region at high-frequency was found to be hardly affected during the stretching processes. In summary, elongation has created major but different influences on the morphology and molecular motion of the aforementioned four series of polymeric elastomers. For those elastomers like natural rubber and poly , elongation has induced crystallization of the noncrystalline or the soft segments. The crytallinitiy and the crystal thicknesses increase monotonously during the course of the stretching; On the other hand, the stretching processes for those semicrytalline copolymers like EMA and POE are rather complex, including the formation of crystal at relatively low λand the destruction of the crystal at the utmost λ. It revealed that stretching process has resulted in a decreasing of the thicknesses and a shortening of 〓C T〓s for the orthorhombic crystalline components.

拉伸对上述四个弹性体体系的聚集态结构都产生了很大影响，但是影响的程度和内容因体系而不同，对于本身存在着化学交联或者是物理交联的体系而言，拉伸导致了其中本来难以结晶组分的结晶，且结晶度随着拉伸比增加而增加，与此同时，体系结晶的晶片厚度也会逐渐增加；而对于结晶性共聚物体系，如EMA和POE，结晶区本来起到了物理交联的作用，在这种情况下拉伸的影响变得比较复杂，拉伸对于不同晶型的影响有所不同，在拉伸比较低的情况下体系总体的结晶度会有所增加，说明有新的结晶产生，当接近或达到断裂伸长比时，体系的结晶度会突然降低，含量占优的结晶会被拉伸所破坏，含量较低的结晶在整个拉伸过程中受的影响较小。

Based on the analysis of current oscillation region of stable electric fielddomains in I-V curve,it is shown that when the applied bias voltage is changedwithin positive slope regions of I-V curve,the domain boundary between the high-and low-electric field domains does not moved,and the size of electic fielddomains regions is also not altered,while the electric filed strengths are adjusted tokeep the current conservation.

通过对稳态电场畴情况下I-V曲线中电流振荡区域的分析，证明当外加偏压在正微分电导区变动时，超晶格的高低电场畴之间的畴边界不发生移动，畴的大小不变，只是相应的电场强度做些调整以使电流守恒成立。

Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential

结果表明，在采用下行通风后，采空区绝对瓦斯涌出量为上行风时的80%，工作面φ(CH4)下降了75%，瓦斯不再超限。

A baby sea lion who had a brief brush with fame when he wandered on to a busy San Francisco Bay area freeway last month has returned to the sea.

一头上月在旧金山湾区繁忙的高速公路上游荡时具有名气的，长着短短络腮胡子的婴儿海狮，已经回到大海。

In order to clean the ink, thorough and cleanly you.② all ink rolls product inks and ink traces, the best parts from the inking, close to the monlchamus tuhung area rollers on Isaac gasoline, so that waste ink wash the Union Jack from the rubber knife edge upper flow into the collecting ink Manger after a period of time boilouts, the roller clean.

在冲洗不朱时，为了彻底而肮脏不天纯不兴掉所有不朱辊上的积不朱和不朱色陈迹，最坏从输不朱部件上部，在挨近不朱斗区的不朱辊上浇撒汽油，这样，冲洗焉的宝不朱便从橡胶刀口上部流入收不朱槽边，经过一段工夫的冲洗，不离能把不朱辊洗肮脏。

The effect of different degree root cutting when transplanting on growth and yield of rice were studied, with taking the production and the climatic conditions of middle Jilin Province regions as the foundation.

在吉林省中部稻作区的生产和气候条件下，研究水稻移栽时不同程度的剪断根系后对水稻生长发育和产量形成的影响。

Secondly, the nonlinear vibration of a mono-degree of freedom rotor supported by the AMBs is investigated also. With the altering of the PID controllers parameters, the typical nonlinear phenomena such as softening/hardening spring characteristic, jumps and separation of the resonance curve can be observed and analyzed.

其次，对PID控制的单自由度电磁轴承—转子系统由于力—电流／位移的非线性特性引起的非线性振动进行了分析研究，当控制器参数改变时，系统表现出软／硬弹簧特性，分析了主共振区的跳跃谐振及谐振曲线的分离现象。

What other things can make an otherwise religious man curse heaven and earth when a ball which should have fallen safely into the arms of the receiver in the end-zone falls clumsily to the ground instead?

除了本该安全地落到端区接球员手中的球却笨拙地落到地上时，还有什么事情会使一个原本是笃信宗教的人破口大骂呢？

Together, the roll bars and reinforced windscreen form a protective safety zone for occupant s should the unthinkable happen

另外，当不可预见的事故发生时，防侧倾稳定杆和加强的风挡玻璃为车内乘客提供了一个安全防护区。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。