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We think that the coupling dynamical modeling offlexible multibody system should be established on continuum mediummechanics and analytic dynamics and making the coupling dynamicalmechanism between large overall motions and deformation motions clear.

本文认为柔性多体系统刚-柔耦合动力学建模应从连续介质力学和分析动力学出发，合理地描述柔性体的变形运动，才能探明大范围运动和变形运动之间的耦合动力学机理。

The fictive motions are complex, so they are further analyzed according to their inner situations. It is found that the fictive motions are the metaphor of the factive motions.

现实位移类的"向+NP"在不同句法条件下的变换问题讨论了作状语和作补语的"向+NP"的变换问题，简要分析了变换的一些限制条件。

Instantaneous motions of the end effector of the typical industrial serial 6-DOF and 5DOF robots are also studied using reciprocal screw theory, The constrained and permitted motions at special configurations are given. Furthermore, the satisfied conditions for the special configurations are discussed, and in the reference coordinate system general expressions of the reciprocal screw and existed motion screw and the subspaces of the permitted rotational axes are obtained under all circumstances at special configurations.

本文中还用反螺旋理论研究了六自由度和五自由度工业机器人的瞬时运动，给出了它们在正常位形和特殊位形下的受约束的运动和存在的运动，以及它们在所有运动参数的不同组合下的反螺旋及存在运动螺旋系的一般表达式和转动轴线存在的子空间。

Devise hand positions and motions that automatically increase speed; this topic is one of the major contributions of this book, and will be treated topic by topic later on as it is too big to be covered here; it involves such specific skills such as thumb over method, glissando motion, relaxation, flat finger positions, arm and wrist motions, etc., and the use of "post practice improvement".

设计最佳的手型与动作，来精确地控制相角（译注：即手指落下的时间差），这个位置也让你的手可以流畅地连接到下一个平行音组。如果在数分钟内都没有多大进步，那你或许有甚么地方做错了–这时候就要想另外的方法。

Stationary motions of the system were determined and periodic motions near them are conustructed using the Liapounov theorem of the holomorphic integral.

确认系统运动是稳定的，并通过Liapunov全纯积分定理，构建其近似的周期运动。

In this dissertation, periodic impact motions in vibro-impact systems are studied, and the existence and stability of superharmonic periodic impact motions are obtained. The critical bifurcation parameter intervals of superharmonic periodic impact motions are deduced, and numerical simulations are used to verify the results.

中文题名碰振或约束系统的全局分析及稳定性研究副题名外文题名 Studies on global analysis and stability in vibro-impact or constraint systems 论文作者张彦梅导师陆启韶教授学科专业一般力学与力学基础研究领域\研究方向学位级别博士学位授予单位北京航空航天大学学位授予日期2002 论文页码总数95页关键词碰振系统转子系统多体系统碰撞振动馆藏号BSLW /2003 /O322 /1 本论文讨论了碰撞振动系统的周期碰撞运动，得到了超谐周期碰撞运动的存在性和稳定性，推导出亚谐周期运动的临界分岔参数区间，并利用数值模拟进行验证。

The fictive motions are complex, so they are further analyzed according to their inner situations. It is found that the fictive motions are the metaphor of the factive motions.

现实位移类的&向+NP&在不同句法条件下的变换问题讨论了作状语和作补语的&向+NP&的变换问题，简要分析了变换的一些限制条件。

The ship motions have six degrees, if the motion of surge is ignored, it is believed pitch and heave motions are coupled, roll, sway and yaw motions are coupled. Because the lateral motion is more remarkable than longitudinal motion, and it is the main reason that governs the sink of vessels, it is most important to the study of seakeeping, it is studied and predict in this paper.

在船舶运动的六个自由度中，不考虑进退运动，可以认为纵摇和升沉是耦合的，横摇、横荡和摇艏是耦合的，由于横向运动较纵向运动显著，是决定船舶倾覆的主要因素，对整个耐波性的研究尤为重要，本文对其进行了研究和预报。

Besides, seakeeping motions in regular waves are calculated by nonlinear strip theory, and that in short-crested irregular waves are evaluated by applying the principle of linear superposition. Evaluated seakeeping motions then added into the simulated maneuvering motions in short-crested irregular waves.

耐航运动部分则是在前述操船引致的纵移、横移、平摆及横摇运动之外，利用非线性截片理论，计算在规则波中的运动反应函数，并依据线性叠加原理，计算其在短峰不规则波浪中的船体运动量，予以附加，以达成在短峰不规则波中的操纵运动模拟计算功能。

Plates of globular cluster M3, taken with the 40cm refractor at Sheshan station of Shanghai Astronomical Observatory, are used by this work. The difference of epoch of these plates is up to 81years. The positions and absolute proper motions of 24 stars in ACT catalogue, which links with the Hipparcos Catalogue based on the International Celestial Reference System, are used as the reference frame. Using the central overlapping principle, the absolute proper motions of 534 stars in the region of about 100'×100' around the cluster are determined. After the membership determination of the stars which based on the data of proper motions, average absolute proper motion components for the cluster of -0.3±0.3 mas/yr in R.A.

本文使用上海天文台佘山40厘米折射望远镜拍摄的14张最长时间跨度为81年的球状星团M3底片的PDS扫描结果，使用与 Hipparcos星表相联系的基于国际大球惯性参考系的ACT星表中的 24颗恒星的位置和绝对自行为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近100'×100'天区内534颗恒星的位置和绝对自行，并利用这些自行对成员概率进行了估算，得到这个星团的赤经方向绝对自行为- 0.3±0.3mas/yr，赤纬方向绝对自行为-3.1±0.3mas／yr。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。