不变化

It was found that the pemeability of the dust core was almost a constant in the frequency range from 1KHz to 100KHz,and the quality factor Q of dust core increased with increasing frequency.It was also found that Q became higher at the frequency over 50KHz in comparison with that of permalloy in higher frequency.

结果表明，在测量的频率范围内(1KHz-100KHz)，该粉芯的磁导率几乎不随频率变化而变化；粉芯的品质因数Q随频率的增加而增加，在较高频率时有着比坡莫合金粉芯还要高的值，具有应用价值。

In the second section,the effect of the changes of chain architecture on the boundary of the phase is studied.

当链长(N=61)保持不变，l从10减少到6时，微涨落相边界的变化和增加链长时的变化基本相似，但同时l的降到也促进了胞结构的出现，这与链长增加的影响是不同的。

One important characteristic of standing wave is that its phase keeps constant in different points of the network.

驻波的一个重要的特点就是相位不因位置的变化而变化，这个特性可以减少信号偏斜。

It was shown that the 3D deformation in the tunnel at soft rock was obvious at F7 fault and phyllite section, with the characteristics of large deformation and longitudinal displacement developing in the opposite direction of work face and being stable at a distance about 2.0 times of tunnel diameter from the work face. And the 3D displacement of tunnels at F7 fault zone developed in an uneven symmetrical way, while there was good consistency for 3D deformation at slate section. Furthermore, there was a mutally verifying relationship between 3D deformation and ground stress distribution of tunnel region.

结果表明，F7断层和千枚岩地段软岩隧道三维位移十分明显，具有隧道大变形特性，其纵向位移背离开挖面方向发展并在相距开挖面约2.0倍洞径时趋于稳定状态；F7断层地段隧道三维位移呈不均匀对称地发展变化，而板岩地段三维位移变化的一致性较好；隧道三维变形规律与隧道区域地应力场的分布存在相互印证关系。

Poikilotherm; allotherm; heterothermic animal; poikilothermal animal

不能依靠自身代谢产热维持恒定的体温，体温随环境温度的变化而变化的动物。

Through a plenty of data of compressal tests with a lot of samples which are different in moisture content and voids ratio , the relation between pressure,moisture content, cavity ratio and pressural modulus is disclosed in the paper,a table that is suitable for xian district is also made based on the data .

增湿变形是在压力作用下变形达到稳定后由于含水量增大而产生的附加变形，黄土地基可因水管漏水、建筑物排水不畅、地下水位上升等原因引起地基土的增湿，计算增湿变形的关键是研究土体含水量变化后引起的模量变化。

The calculating results which predict that the tip undercooling decreases continuously with an increase of the primary spacing and no minimum undercooling exists have lent an obvious evidence to the above theoretical analyses. The tip undercooling changes sharply for the low primary spacings but slowly for the large spacings.

本文提出的数值模型表明，Peclet数较小时，可以将强制性枝晶生长处理成自适应边界条件进行数值计算；计算结果充分证实了上述的理论分析，并指出顶部过冷随一次间距的增大而连续减小，不存在最小过冷值；一次间距较小时顶部过冷变化显著，较大时变化缓慢。

Considering the effect of the angle of internal friction on the inclination of sliding plane of soils behind retaining wall, circular and catenary, the two shapes of minor principal stress arch are theoretically analyzed. According to the shapes of minor principal stress arch, the coefficients of earth pressure corresponding to different angle of internal friction and that of wall friction are gained.

为克服现有考虑土拱效应的土压力计算方法不能考虑墙土摩擦角变化对挡土墙后土体滑裂面的影响的不足，考虑墙土摩擦角变化对挡土墙后上体滑裂面倾角的影响，对圆弧和悬链线两种拱形分别进行了分析，并与现有方法计算结果进行了比较。

Pearson product moment correlation coefficients were used to analyze the effect of the age, cranial length and maxillary length on the molar's location in the maxilla.

但是后续的实验研究表明，上颌第一恒磨牙的位置并不是固定不变的，它会随着牙弓内、外因素的变化而发生位置的变化，影响错畸形的形成[1]。

Barrel is the key part of artillery. In shot process, propellent gas of high pressure and high temperature flows in the tube at a high rate of speed, which brings an upheaval to the temperature field of the composite barrel. As to the composite barrel with metal inner, its poor thermal conductivity is more likely to cause uneven temperature distribution and bigger temperature gradient, to produce improper deformation and to make the work temperature of metal inner rise, all of which will affect the life span of barrel.

身管是火炮的关键部件，在火炮发射过程中，高温、高压的火药燃气在身管内成脉冲式高速流动，使身管受到急剧的加热，引起身管壁内的温度急剧变化，而对于带金属内衬复合材料身管，由于复合材料导热性能较差，更容易引起非均匀温度分布以及较大的温度梯度，产生不合适的变形，也会使身管的金属内衬的工作温度升高，从而使得身管的寿命降低，同时身管的发热会引起其刚度的变化，增大射弹散布。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。