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According to the scheme in chapter 3, experimental investigations are conducted on the single-axis air-bearing test bed. The effects of both rotating speed and air damping on the vibration frequencies of the beam are discussed. The phenomenon of dynamic stiffening is verified by the results of experiment.

最后我们还按照第三章中设计好的实验方案来对非惯性系下的结构动力学问题进行了实验研究,从实验的角度验证了本文一次近似模型在处理这类非惯性系下的结构动力学问题的正确性和有效性,说明了传统零次近似模型对某些高速旋转梁的数值仿真存在严重的偏差。

The reference domain is assumed to be a bounded open set of R~N with boundary Γ of class C~2. We investigate in this paper the null controllability for the semilinear parabolic equations in non-cylindrical domains. The fixed point method is used in the proof.

本文讨论了定义在上述非柱形区域中的半线性抛物方程零能控性,我们使用的方法主要是通过同胚映射将非柱形区域中的抛物方程转化为柱形区域中的抛物方程,再利用不动点方法得到半线性抛物方程的有关结果。

This wave direction may depend on the ratio of length to width of the structure. Therefore, it is necessary to make wave search to decide the most dangerous wave direction. In addition, the vertical displacement and wave bending moment of transverse section in long zero upcrossing period are larger than that in short zero upcrossing period.

另外,平均跨零周期较大时的垂向位移和横剖面波浪弯矩值大于平均跨零周期较小时的值,这时结构谐振峰值对响应的贡献不大,且垂向位移和横剖面弯矩沿浮体长度方向的分布呈现明显的非对称特性。

In Chapter 2, starting from a generalization of Hensel's Lemma to non-commutative case, we introduce the Brauer characters and the generalized decomposition numbers, and construct a kind of maximal semisimple algebras; then, similarly to Puig's methods, we prove Brauer's Second Main Theorem over arbitrary fields; applying it to blocks with nilpotent coefficient extensions, a formula on characters of such blocks is given; the formula of characters of nilpotent blocks is just an easy consequence of the fomula.

在第二章中,我们将Hensel的引理推广到非交换的情况,以此为起点,定义了Brauer特征标和广义分解数,构造了一类极大的半单的代数,类似于Puig的方法,给出了任意域上Brauer的第二主要定理;作为该定理的应用,我们给出了具有幂零系数扩张的块的特征标公式,幂零块的特征标公式只是它的一个简单的推论。

The state of a body or physical system at rest or in unaccelerated motion in which the resultant of all forces acting on it is zero and the sum of all torques about any axis is zero.

平衡条件物体或体系静止或处于非加速运动的状态,在这种状态下所有力的和为零,所有轴上的力矩和为零

Physics The state of a body or physical system at rest or in unaccelerated motion in which the resultant of all forces acting on it is zero and the sum of all torques about any axis is zero.

平衡条件:物体或体系静止或处于非加速运动的状态,在这种状态下所有力的和为零,所有轴上的力矩和为零

This paper analyses affecting factor on zero degree clearance angle woodworking saws cutting force decreasing and increasing in same cutting condition.

文章从理论方面分析了在相同的切削条件下影响零锯料角木工锯子的切削力减小或增加的因素及其作用程度,得出了零锯料角木工锯子的切削力小于非零度锯料角木工锯子这一结论。

We proposed that the non-adiabatic passage at zero-crossings of quadrupole splitting would not lead to the great loss of the spin locking signals, and the second-order quadrupolar interaction had significant effects on triple-quantum coherences, which was responsible for the fast decay of the signals; the both experiments and numerical simulations supported this point of view.

另外,在该谱仪上还进行了四极核钠-23的自旋锁定效率的研究;从含时Shr〓dinger方程出发,提出了一个更为确切的四极分裂过零处的绝热通过判据,并指出四极分裂过零处的非绝热通过不会导致锁定信号的快速消失,四极相互作用的二阶项对三量子相干的影响不能忽略,它是引起锁定信号快速消失的原因;实验和数字模拟的结果证实了这个理论。

On 18 May 2003, over 60 alumni, students, and friends of the CUMBA programme participated in the 'Round-the-CU Walkathon' to raise donations for the 'Business Community Relief Fund for Victims of SARS'.

逾六十名工商管理硕士课程的校友、学生和友好,於二零零三年五月十八日参加在中大校园举行的环校步行筹款,为受非典型肺炎影响的家庭筹得善款逾六万三千元。

It is not enough if we just only depend on static yield curve of zero-coupon bond which reflects the current term structure of interest rate and make it the lever for financial products with uncertain cash flow, especially the measurement of interest rate risk on financial products with random cash flow which is related to interest rate, but need to set yield curve of zero-coupon bond as dynamic models.

对非确定性现金流金融产品,特别是与利率相关的随机现金流的金融产品进行利率风险度量,单纯依赖反映现行利率期限结构的静态零息票债券收益率曲线作杠杆是不够的,而是需要把零息票债券收益率曲线建成动态模型。

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推荐网络例句

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性,但我大喊,并在他们的方向扔石头让他们过的线索,远离我,以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。

Store this product in a sealed, lightproof, dry and cool place.

密封,遮光,置阴凉干燥处。