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And it was divided into four groups at randomly (n=6),The vertical compression,bending and torsion intensity in without and with reduction of cortical fragment of plate fixated contra side, without and with reduction of cortical fragment of plate fixated sidewere measured.A11 results were analyzed with statistic method.2、animal experiment :The 12 adult goats were divided into two group at randomly,wedged cortical defect with 1 cm of long and conjugate diameter was created in the middle-part of the medial femur and plate was fixed in the defect side and as the experimental side,the other side was control.after operation 4、8、12 weeks,investigation of the fracture healing by means of gross observation,X-ray examination and histology in both sides.

测试各组的垂直压缩、三点弯曲及抗扭转的刚度。2、动物实验：12只健康成年山羊，雌雄不限，体重在20～25kg之间，在同一只羊双侧股骨中段内侧制造楔形骨皮质缺损，分实验组和对照组两组进行钢板内固定并植骨，于术后4、8、12周对实验组及对照组行X线正位片检查，观察骨折愈合过程中不同时间点的影像学特点。于4、8、12周各组处死4只动物行大体标本观察，并取缺损区骨组织行组织学检查。X线检查及组织学检查结果根据LaneX线评分标准及组织学评分标准进行评分。最后采用SPSS13.0进行统计学分析。

On the basis of the conclusion above, the nonlinear weak controllable vectors can be obtained, which compose the second class of weak controllable matrix, by means of matrix transfermations of the first class of weak controllable matrix. Furthmore the second criterion of weak controllability, accessibility and strong accessibility, which is more standard, more succinct and more practical, is obtained. On the basis of the first criterion and the second criterion, several important problems about nonlinear controllability are discussed, which include 1 local controllability; 2 three classes of local controllable decomposition, separately by means of local coordinate changes in the neighborhood of a nonsingular point, a point on a singular surface or a designated point x〓 with a designated input u〓; 3 the character of controllability of the ith state variable x〓 in different controllable areas and their boundaries.

在第一判别定理和第二判别定理的基础上，我们分析了非线性系统受控性质中的几个重要问题，所得到的结论包括i得到了非线性系统在可平衡点附近的能控性判别定理；ii分别给出了非线性系统在非奇异点、s阶奇面以及在状态空间内给定的一点x〓和输入u〓上的三种状态分解形式以及相应的求解方法；利用系统的Ⅰ型弱能控矩阵与Ⅱ型弱能控矩阵秩相等的条件，得到了只用系统的前n个弱能控向量来判断系统的弱能控性的判别定理；iii通过引入系统状态分量的三类受控区域边界的定义及相应的求解方法，初步探讨了非线性系统各个状态分量在不同的受控区域及其边界上的受控性质。

The value of the cosine function at argument x.

参数为x的情形下余弦（在原正弦函数中x取余角）函数的数值。

The required opeartion is called cross product, and it is represented by "x".

这个需要的运算叫做叉乘，我们把它表示为"X" v = v1 x v2

It is showed that in the X-ray diffraction patterns of the interlayer solid solution Ti3Si0.9Al0.3C1.93 and Ti3Si0.8Al0.4C1.93 bulk samples,which were in-situ reactively synthesized by hot-pressing the elemental Ti,Si,Al and C mixed powders,the diffraction peaks of [00L] crystal planes are very weak,there is only a small diffraction peak belonging to the [008],and the diffraction peaks belonging...

结果发现，用热压Ti、Si、Al和C混合粉末原位反应合成的Ti3Si0.9Al0.3C1.93和Ti3Si0.8Al0.4C1.93层间固溶体块体样品的X射线衍射谱中[00L]晶面的衍射峰极其微弱，只有[008]面有一个小的衍射峰，[002]、[004]和[006]面几乎没有衍射峰存在，而该块体样品的粉末的X射线衍射谱中所有[00L]晶面的衍射峰均存在。

However, Crick and Watson might not have been able to discover the DNA double helix as quickly as they had without the work of the x-ray crystallographer X Rosalind Franklin, who died before the Nobel Prize was awarded.

然而，如果没有 X 射线晶体学专家罗莎琳德·富兰克林的工作，克里克和沃森也许不会这么快就发现 DNA 的双螺旋结构。

External dimensions : 600 x 400 x 200 mm Two colour printing as indicated below: The following text must be in Univers 66 Bold, logo in cyan blue and text in black.

外部尺寸： 600乘四百x 200毫米两种颜色印刷，如下所示：以下文字必须在宇宙66大胆，标识青色蓝色和文字为黑色。

External dimensions : 600 x 400 x 200 mm Two colour printing as indicated below: The following text must be in Univers 65 Bold, logo in cyan blue and text in black.

外部尺寸： 600乘四百x 200毫米两色印刷，如下所示：以下文字必须在宇宙65大胆，标识青色蓝色和文字为黑色。

Radiation from X ray also can affect the developing embryo and fetus ,with the most dangerouse time bing the first several weeks after conception,when women do not yet know they are pregnant .it is important for women and their physicians to weigh the risk of an X ray when an actual or potential pregnancy is involvel.

在有了胎儿这个概念的前几个星期，有很多危险的时刻，因为女人们还不知道他们已经怀孕。X射线对于女人和她们的身体有致命的危害。当然也包括胚胎和胎儿在内。

The degree of a polynomial is equal to the highest power of x in it; here it is 2 because of the x2 term.

一个多项式的阶与其中x的最高次幂相等；这里是2因为x^2项。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。