振动型

In this paper, we discuss the oscillation and nonoscillation of the solutions of the neutral partial difference equations.

本文主要讨论了高阶非线性中立型偏差分方程正解的存在性问题和中立型椭圆偏差分方程的振动性问题。

According to the comparison analysis for the force-displacement relationship obtained from stets of earthquake simulation tests for 3 RC single story structures and the quasi-static test for one RC single story structure (identical with the former 3 models), as well as the analyses for the natural frequency change of the 3 RC single story structures with the increase of the excitation levels, it is found that the accumulated hysteretic energy-dissipation capacity is critical for the structural safety even after serious damage.

本文首先通过对近场破坏性地震动的特性分析，给出了脉冲型地震动的量化定义，并通过研究归一化反应谱变化规律的方法，分析了两类脉冲组合即：波前脉冲组合以及波后脉冲组合对于主脉冲作用效应的影响，总结归纳出波前脉冲与波后脉冲对主脉冲作用效应的不同贡献规律，并通过单层钢结构模型的地震模拟振动台试验验证了理论分析结果，为进一步研究揭示脉冲型地震动中主脉冲的破坏能力奠定了基础。

Geometric configurations of three heterocyclic organic compounds are optimized by B3LYP method at the level of 6-31G(superscript *) and there are no imaginary frequences in vibrational analyses.

采用密度泛函理论中的B3LYP方法，在6-31G水平上对三种五元杂环物质进行了构型优化，对优化后的构型做振动分析，均未出现虚频率。

Annual output of various specifications of more than 500 tons of metal wire; metal knitting net 500,000 m2, of which net square hole size 3 ~ 500 head / inch, mesh size of 8.00 ~ 0.025mm; dense network pattern specifications for 7 40 /~ 400 3200 Head / inch, mesh size of 315 ~ 3m; various filter components, filter 1.5 million, the smallest filtration precision of up to 1m; screener seized a (75mm, 200mm sieve sets of high precision electric molding and 200mm Screen test sets) is the national standard grinding found the Commission designated by a manufacturer; steel screw sets (with a high strength, corrosion resistance, impact resistance, high temperature, can be embedded in aluminum, magnesium and plastics such as low-intensity within the screw shell a new type of screw fasteners, specifications have an ordinary type, locking type and silver-plated type) and vibration screening equipment.

年产各种规格金属丝材500多吨；金属编织网50万m2，其中方孔网规格为3～500目/英寸，网孔尺寸8.00～0.025mm；密纹网规格为7×40/～400×3200目/英寸，网孔尺寸315～3μm；各种滤网组件、滤芯150万件，最小过滤精度可达1μm ；筛分检具（φ75mm、φ200mm高精度电成型套筛和Φ200mm试验套筛），是国家磨委会指定的标准检具生产厂家；钢丝螺套(具有高强度、抗腐蚀、耐冲击、耐高温，能嵌入铝、镁及塑料等低强度壳体螺孔内的新型螺纹紧固件，规格有普通型、锁紧型和镀银型)及振动筛分设备。

Multiple-paths hydrogen abstraction reactions of fluorine -with CH_3OH have been investigated at the MP2/6-311 ++ g level. The potential energy surfaces for H-abstraction reaction from carbon atom and oxygen atom were given respectively. The results indicate that there is only one minimum energy path for hydrogen abstraction from carbon atom, while multiple paths were found for hydrogen abstraction from oxygen atom. All the stationary structures, frequencies as well as PES sketch of all channels were given, in which the dominant channel is by a five-member ring transition state. The calculated heat of reaction is 170.62 kj/mol for channel 1, 119.41 kJ/ mol for branch channel 6. The results are in good agreement with experimental data.

以MP2/6-311 ++g水平上详细研究了氟原子与甲醇抽氢反应的多通道反应机理，得到了各条通道中涉及的驻点的构型和振动频率及其能量，给出了两张完整的反应势能面，结果表明，氟原子从C原子上抽氢时有一条明显的最低能量通道，而从氧原子上抽氢时要涉及多条分支通道和多个驻点构型，给出了各分支通道势能面示意图，结果表明以形成五元环状过渡态通道为优势通道，计算得到经途径1生成CH_2OH时反应放热170.62kJ/mol，经分支途径6生成CH_3O自由基时反应放热119.4 kJ/mol，此结果与实验值一致。

Apply to industrial worm gear lubrication. L-CKE compound for the worm oil, mainly for copper - a pair of steel-and two-cylinder, and other types of siege under light load, in a smooth drive without the impact of the worm, deputy. L-CKE / P worm extreme pressure for oil, mainly for copper - a pair of steel cylindrical heavy to bear, there is vibration in the transmission and impact of the worm, deputy.

适用于工业蜗轮蜗杆传动装置的润滑。L-CKE为复合型蜗轮蜗杆油，主要用于铜－钢配对的圆柱型和双包围等类型的承受轻负荷、传动中平稳无冲击的蜗轮蜗杆副。L-CKE/P为极压蜗轮蜗杆油，主要用于铜－钢配对的圆柱型承受重负荷，传动中有振动和冲击的蜗轮蜗杆副。

YXC Electric Contact Pressure Gauge is better than YX Standard Electric Contact Pressure Gauge on high power rating, reliable signal, long life, and to vibration-proof.

YXC 型电接点压力表同 YX 型电接点压力表相比具有额定功率大，发讯可靠，接点寿命长等特点，并有一定抗振动性能。

By means of the plating technology and the system designed and made ourselves, we call them as the direct-heat evaporating roll-pulled with vacuum piston and the helix evaporating of straight heat-wire with the negative thermal specific resistance , the align polishing ring films and the separating ones of pure gold have been plated directly at the inner wall of the capillary of Sealed-off CO〓 laser.

简便有效地使器件的输出功率、光束品质、稳定性和使用寿命都得以提高的作用效果；分析了放电驱动催化机理及催化效果与器件参数、工作状态及其中的等离子体过程的对应关系，建立了数学模型，编程数值计算了放电管内正柱区中等离子体参数分布及其与器件工作外参数的关系；利用我们设计开发的直热式真空活塞卷拖和负阻直热丝螺旋蒸镀工艺及制作的系统，在封离型CO〓激光器毛细管玻璃内壁上直接镀制出了单质金的镜面环膜和离散膜，经理论分析和实验检验，指出美国专利4756000号的环金方案将导致器件工作特性的改变和恶化，降低效率；肯定了正柱区边界部分场对建立良好的激光振荡的作用意义，明确提出了①作为高品质器件设计基础的弥散膜催化剂；②高斯管型弦驻波振动定型磨制、检测的新概念及相应的制备加工工艺；实际制出了管子，测定了其基本的工作特性和初期过程。

The flexible workpiece vibration modes are available for partitioning the distinct machining stages that denote the dynamic variation characteristics of the workpiece in the process and for selecting the high-order dynamic frequency modes that can produce the displacement at the tool-cutting position as the virtual vibration modes to predict the cutting stability.

根据薄壁零件的振型模态，划分表示工件在加工过程中动态特性变化的不同加工阶段、选取能够在刀具切削位置激起振动位移的高阶动态频响模型作为预测切削稳定性的有效振型。

A clearance-typed nonlinear torsional vibration model with multiple degree of freedom of star gear transmission being excited by errors of transmission and time varying meshing stiffness was established.

建立了受传递误差和时变啮合刚度激励的星型齿轮传动的间隙型多自由度非线性扭转振动模型，并用自适应变步长Gill数值积分方法进行了求解。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。