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It can be concluded that, when only elastic impact is considered, the coefficient of restitution is determined by not only the material property of the target, but also the mass ratio of the colliding body to the target, and the boundary condition of the target.

结论如下：只考虑弹性碰撞时，恢复系数不仅与靶体的材料性质有关，还与碰撞物体质量比、靶体的支承条件有关，但与碰撞的初始速度无关。

Some basic properties of σ- LFSR over F4 are studied, such as nonlinearity, cycle structure distribution of state graph, the largest period and counting problem related. The conclusions are as follows:The coefficient ring of σ-LFSR is isomorphic to the matrix ring over F,. The cycle structure of σ- LFSR is consistent with that of the determinant of the corresponding polynomial matrix if and only if the feedback polynomial of - LFSR does not contain nontrivial factor over F2,. The counting formula of the number of σ- LFSR with inconsistent cycle structure is also showed in that part. The period of σ-LFSR with degree n is maximum if and only if the determinant of the corresponding polynomial matrix is the primitive polynomial with order 2n over F2,.

本文研究了有限域F_4上的σ-LFSR的一些基本性质，如非奇异性、状态图的圈结构的分布、最大圈的充要条件及相关的计数问题等，得到以下结论：σ-LFSR的系数环同构于F_2上的矩阵环；σ-LFSR的状态图的圈结构与对应的多项式矩阵的行列式的圈结构一致的充要条件为σ-LFSR的反馈多项式不含有非平凡的F_2上的因式，给出了圈结构不一致的σ-LFSR的计数公式； n次σ-LFSR周期达到最大，当且仅当对应多项式矩阵的行列式为F_2上的2n次本原多项式。

It is the only coin you have, and only you can determine how it will be spent.

这是你唯一拥有的，而且只有你才能决定如何来花费它。

Compared sterilization only under the microwave irradiation with that only with formaldehyde, the remaining colon bacillus is monitored. It is proved that the microwave can work in coordination with formaldehyde for sterilization.

只用微波辐照或只用甲醛消毒和在微波辐照下甲醛消毒的对照实验中，通过考察残余大肠杆菌量，证明了微波对甲醛消毒有协同作用。

II abradability, scratches, the surface, colorfast, water, oil, and very welcome, particularly yanhe confidein, in speeds up to 300-500 package/minute high speeds, the cigarette brand are subjected to enormous mechanical loads, so business card printing and membership card making products not only need polishing, but also to have a very strong resistance to abrasion, and water is not only fulfill this requirement, and both the gravure printing or offsctdruckereien no cigarette packets are retained wash after wash.

耐磨性强，抗划痕，被印物表面耐磨、不掉色、斥水、斥油，深受用户的欢迎和信赖，尤其是烟盒，在速度高达300-500包/分钟的高速运转中，烟标要承受很大的机械负荷，为此制卡和会员卡制作品不仅需要上光，而且要有很强的耐磨性，水性上光油不仅能完全满足这一要求，而且无论是凹印还是胶印均无发现烟包掉色的现象。

There were only five humans aboard the entire fleet he commanded, and he was the only combatant.

他指挥的整个舰队只有五个人，战斗人员只有他一人。

These are very utilitarian art commercial idea, only for your reference, a smile only.

以上都是非常功利的艺术商业化的想法，仅供大家参考，一笑而已。

We will prove that the only compact dual Toeplitz operator is the zero operator, and that a densely defined dual Toeplitz operator with square integrable symbol is bounded if and only if its symbol is essentially bounded.

首先，我们证明了只有零算子是紧的对偶Toeplitz算子，同时给出了以平方可积函数为符号稠定义的对偶Toeplitz算子有界当且仅当它的符号函数是本性有界的。

P. vulgaris: 30℃: The compages of SA 150 mg·L~(-1 and CaCl_2 1500 mg·L~(-1 can increase plant"s heat-resistance observably.32℃: Using SA only 200 mg·L~(-1 can increase plant"s heat-resistance observably.34℃: Using SA only 150 mg·L~(-1 can increase plant"s heat-resistance observably. 36℃: The compages of SA 150 mg·L~(-1 and CaCl_2 500 mg·L~(-1 can increase plant"s heat-resistance observably. 38℃: The compages of SA 150 mg·L~(-1 and CaCl_ 1000 mg·L~(-1 can increase plants heat-resistance observably.

欧报春：30℃：150 mg·L~(-1)的SA和1500mg·L~(-1)的CaCl_2的组合对于提高欧报春的耐热性最好；32℃：单一施用200 mg·L~(-1)的SA达到的效果最好，效果最弱的是单一施用500 mg·L~(-1)的CaCl_2；34℃：单一施用150mg·L~(-1)的SA的效果最强，混合施用200 mg·L~(-1)的SA和500 mg·L~(-1)的CaCl_2的效果次之，单一施用1000 mg·L~(-1)的CaCl_2的效果最弱；36℃：混合施用150 mg·L~(-1)的SA和500 mg·L~(-1)的CaCl_2对于欧报春耐热性的提高效果最好，而单一施用100 mg·L~(-1)的SA的效果最弱；38℃：150 mg·L~(-1)的SA和1000 mg·L~(-1)的CaCl_2混合施用能有效提高欧报春的耐热性，单一施用50 mg·L~(-1)的SA的效果最较弱。

The aim of the dissertation is to try to give a substantial evidence for the opinions of history comparative linguistics at language variation providing the individual cases and to try to make the elucidation: The main reason that language variation produce is to not only and only is a mutation of inner part system because of the language with regulation,...

力图为历史比较语言学在语言变异方面的论题提供一个可资佐证的个案，试图说明：语言变异产生的主要原因不仅仅是由于语言系统内部的突变和调节，一些外部因素诸如人们的民族语言心理态度、性别、年龄、经济的向心力等等也能在语言的变异中产生相当大的作用。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。