动力学

In the meantime, the difference between a direct integration method and a modality superposition method in the nonlinear solution of large sized shaftings was also investigated. It can be shown that the use of a nonlinear method for solving the kinetics response of a higher dimensional rotor bearing system is both essential and feasible. With regard to the nonlinear kinetics problems of a rotor system the direct integration method is more effective than the modality superposition method. steam turbine, rotor, dynamics, nonlinearity

国内外先后采用非线性油膜力的数值积分方法对转子轴承系统的非线性动力学行为进行了一定研究，但主要集中在简单转子—轴承系统的研究上，在分析上主要采用的是简单离散方法，转子多被简化为刚性转子和Jeffcott转子模型，只能对简单转子—轴承系统的非线性动力学行为进行定性的分析，而对于象汽轮机组轴系这样的高

At first, the rought C〓F〓 mixed gases are obtained by pyrolysis process of R22. A experimental pyrolysis device is designed and made by ourself. The optimum operating conditions are offered in the paper. Secondly, the much efforts is on the synthesis of R134. After through the discussion of basic thermodynamics and kinetics, selecting and preparating catalyst, it is possible that the synthesis of R134 by pyrolyzed gases hydrogenation. Base on the character of catalytic process, the kinetics equation about C〓F〓 catalytic hydrogenation is established. The rate constant of the reaction is obtained through experiment data regression. In order to achieve higher yield of R134, some optimum technological conditions is determined.

论文首先对R22裂解制成四氟乙烯混合原料气的裂解过程进行了讨论，自行设计和制作裂解反应装置，并确定裂解反应的最佳操作条件；然后，重点对R134的合成进行基础研究，分别从热力学和动力学的角度探讨以含四氟乙烯的R22裂解混合气为原料合成R134这一全新工艺的可能性，选择和制备加氢催化剂，根据催化过程特点建立四氟乙烯催化加氢反应的总包动力学方程，并在此基础上自行设计和制作中试合成装置，获得了以裂解混合气为原料合成R134的最佳工艺条件，为R134的工业化生产提供了必要的理论依据和实验基础。

In order to investigate the profile of absorption, excretion and retainment of As〓S〓, and to estimate the influence of Semen platycladi and other excipient in As〓S〓 absorption, we studied the pharmacokinetics in humans and mice respectively.

为了了解As〓S〓复方胶囊在人体内吸收、排泄、蓄积等规律，我们进行了临床药代动力学研究，同时，为了比较复方制剂及不同赋形剂对As〓S〓吸收的影响，进行了动物药代动力学实验。

Fitting curves are in good agreement with the experimental results,the calculated kinetic parameters are in good agreement with those reported in term of modeling of the pyrolysis of the three components assuming hemicellulose,cellulose and lignin pyrolyzing independently and para...

采用非线性最小平方算法，按三组分独立平行一级反应热解动力学模型，模拟计算的曲线与实验结果吻合较好，求解的动力学参数与文献报道值吻合较好，且随着升温速率的加快，纤维素和木质素热解的活化能有增加的趋势，而半纤维素活化能有下降的趋势。

The digitized function prototype principle - polysome system dynamics concise course, hoped to the friend which studies the polysome dy...

数字化功能样机原理－多体系统动力学简明教程，希望对学习多体动力学的朋友有帮助。

The digitized function prototype principle - polysome system dynamics concise course, hoped to the friend which studies the polysome dyna...

数字化功能样机原理－多体系统动力学简明教程，希望对学习多体动力学的朋友有帮助。

The digitized function prototype principle - polysome system dynamics concise course, hoped to the friend which studies the polysome dynamics has the help.

详细说明：数字化功能样机原理－多体系统动力学简明教程，希望对学习多体动力学的朋友有帮助。

Topics discussed include ultrafast spectroscopic techniques; aspects of electron transfer reactions ranging from solvent effects; intermolecular and intramolecular systems, to dynamics at semiconductor surfaces; the dynamics of chemical systems using Raman spectroscopy; pericyclic photochemical rearrangements and photodissociation reactions; solvent--solute interaction dynamics; and chemical dynamics in clusters.

讨论的议题包括超快光谱技术，电子转移反应的溶剂效应等方面；分子间和分子系统，动力在半导体表面，使用的化学拉曼光谱系统动力学；周环重排和光化学解离反应；溶剂-溶质相互作用的动态以及在化学动力学组。

However, when AV interval was shorter than 80 msec and longer than 180msec, there was reduction of LVOTG, yet the CO was also reduced. The results showed that the hemodynamic improvement must depended on the state of pre-excitation of ventricle as well as the optimal left ventricular filling.

且在AV间期为100至120毫秒时出现最佳血液动力学效应，而AV间期在小于80毫秒、大于180毫秒时，虽有左室流出道压力阶差的降低，但心输出量均有下降，提示血液动力学的改善必须依赖右心室的提前激动状态及最佳的左心室充盈。

In order to improve the dynamic quality of the whole system, the dynamic balance precision of the high speed rotor should be improved. Dynamic behavior of geared rotor system was analyzed using modal synthesis method

应用模态综合法分析齿轮传动转子系统的动力学特性，结果表明模态综合法能有效地降低系统的自由度，提高计算速度，对于复杂的多转子-轴承系统的动力学研究具有广泛的应用前景。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。