查询词典 fluid dynamics

The microbes dynamics rule during tobacco life cycle in various types of soil might be a new consideration to understand the development of especial features of flue-cured tobacco. soil type ; edaphon ; dynamics ; flue-cured tobacco

因此加强对土壤微生物种群与土壤类型之间在烟叶生长期的相关规律研究，可以丰富烤烟根际微生态方面的内容，并为研究烤烟根际微生物与优质烟叶生产之间的关系，以及这种关系对烤烟产量品质的影响提供理论基础。1材

The P. flagellaria clonal population distributing in the Songnen grassland was studied,and we observed the season dynamics of petiole length and the total stolon length as well as pattern of spacer length,compared the numbers of maternal ramets,daughter ramets and single ramets as well as the yearly dynamics of total biomass in 3 years (2003,2005,and 2006). Furthermore,we analyzed the correlation between population quantative character and the community's quantative character.

以松嫩草地羊草草甸内分布的蔓委陵菜无性系种群为研究对象，观测了叶柄长度、匍匐茎总长度的季节动态以及间隔子长度分布格局，比较了3个年份（2003、2005、2006年）的种群母株数、分株数、独立株数和总生物量年间动态，分析了种群数量特征与其所分布的群落的数量特征之间的相关关系。

With ADAMS,a kind of dynamics analysis software,a dynamics model of vehicle with leaf spring and another with hydropneumatic spring were set up.

利用动力学分析软件ADAMS，建立了钢板弹簧车辆和油气弹簧车辆的动力学模型，开展了整车在随机路面上的平顺性仿真，分析了两种悬架对车辆平顺性的影响，并通过仿真数据与试验数据的对比，验证了动力学模型的正确性

Operations are given and testified in this paper. The research methods of intrinsical linear nonholonomic dynamics are similar to those of holonomic dynamics.The rationality and equivalence of Chetaev model and Vacco model in the intrinsical linear nonholonomic system are testified from the mathematic and mechanical aspects. The essential reason is the nonlinear property of intrinsical nonlinear nonholonomic constrain that bring on Chetaev model and Vacco model inequivalent. Chetaev model is a linear approximate method in intrinsical nonlinear nonholonomic system. Vacco dynamical equations are not satisfied to the ideal constraint force conditions, but it gives a significative ponderation on the realizations of intrinsical nonlinear nonholonomic constrain.

本文比较研究了一般非完整系统的Chetaev模型和Vacco模型，首次从力学和数学的角度论证了这两种模型在完整系统和本质线性非完整系统中的合理性和等价性；同时给出了在本质非线性非完整系统中，Chetaev模型和Vacco模型不等价的根本原因，是由本质非线性非完整约束的不确定性非线性本质所导致的；指出在本质非线性非完整系统中，Chetaev模型是一种线性近似的结果，Vacco动力学方程虽然不满足约束力的理想性质，但是为我们研究本质非线性非完整约束的物理实现提供了有益的思考。

The principle of molecular dynamics, the progress in related finite difference technique and interatomic potentiak, the choice of initial and boundary conditions, the realization and control of equilibrium ensembles, the extraction of useful information, and the special use of molecular dynamics and its combination with other computational methods are summarized.

综述了分子动力学模拟技术的发展，介绍了分子动力学的基本原理、有关的有限差分技术、势函数的发展、初始条件和边界条件的选取、平衡态系综及其调控、感兴趣量的提取、分子动力学的特别用途以及与其他计算方法的结合。

This article discusses the principle of molecular dynamics, interatomic potentials (for example, Lennard-Jones potential), some common finite difference algorithms, several molecular dynamics simulation ensembles , and the extraction of useful information.

介绍了分子动力学模拟的基本原理及常用的原子间相互作用势，如Lennard-Jones势；论述了几种常用的有限差分算法，如Verlet算法；说明了分子动力学模拟的几种系综及感兴趣的宏观统计量的提取。

Dynamic neural network is used to approximate the dynamics nonlinear function and linearize the nonlinear dynamics model for rigid robots.

在刚性机器人控制方面，采用动态神经网络辨识动力学非线性函数，对机械臂动力学模型进行非线性补偿，使其线性化。

In the distillation column with a single reactor, the outer loop reactor is designed and applied. The reaction dynamics datas of photochlorination of acetic acid in the reactor were tested. According to parallel-consecutive reaction dynamics model, the parameters were fitted and the model result tallys experiment result well.

在背包式反应精馏装置中，采用了外环流反应器，实验测定了该反应器中乙酸光氯化的反应动力学数据，采用平行-连串反应动力学模型进行了参数拟合，所得模型计算值和和实验值吻合较好。

In order to solve the important and basic problem of the petrogenesis of "Tiantangzhai migmatitic granite" in the core of Dabie orogenic belt, the detailed 1∶50000 regional geological surveying and the big scale dissection of important region (metamorphic rocks, granites and structure), were operated in about 900km〓 area near Tiantangzhai peak. On the bases of the petrology, mineral chemistry, geochemistry of rare earth element and microelement, isotope geochemistry and chronology, physicochemistry, magmatic dynamics, geodynamics, diagenetic simulation, and regional geophysical data, the theory of cooling age and historical geochemistry and the viewpoint of tectonic evolution are applied to study the petrogenesis of Yanshan epoch granites of this region. On the bases of above studies, the process of tectonomagmatic dynamics after indo-Chinese epoch in Dabie orogenic belt is discussed. The important conclusions are gotten

本文针对大别造山带核部&天堂寨混合花岗岩&成因这一重大基础地质问题，在天堂寨一带近900km〓的面积上进行了详细的1∶5万区域地质调查和大比例尺重点区解剖，通过对区内燕山期花岗岩进行岩石学、矿物化学、稀土微量元素地球化学、同位素地球化学和年代学、物理化学、岩浆动力学、地球动力学和成岩计算机模拟等研究的基础上，结合区域地球物理学资料，应用冷却年龄、历史地球化学理论和构造演化观，阐明区内燕山期花岗岩成因，并以此为基础进一步讨论了大别造山带自印支期以来的构造—岩浆动力学过程，取得了如下的重要认识

Based on a systematic field investigation and laboratory experiments, the structures of arthropod communities and the evalution of dominant predatory enemies in cabbage fields of different seasons were studied. The main results were as follows:1 The structures and their dynamics of arthropod communities in cabbage fields1.1 Species composition and population dynamics of each species of the arthropodcommunities in the cabbage fieldsThe research results showed that the occurrence of Pieris rapae in spring cabbage fields was relatively grave.

本文在田间系统调查和室内试验的基础上，对不同季节甘蓝田节肢动物群落结构及捕食性天敌优势种的评价进行了研究，主要结果如下：1甘蓝田节肢动物群落结构及其动态1.1节肢动物群落物种构成和各种群数量动态研究结果表明，春甘蓝田菜青虫的发生比较严重，菜青虫在调查期间种群数量呈上升趋势，5月初高峰期平均每株甘蓝接近20头；菜蚜与小菜蛾的发生相对较轻，菜蚜在5月中旬有个明显高峰。

Connectors are lines that can be anchored to particular places, called glue points , on the graphic object.

连接符，可固定在图形对象的特定的地方的线条。

Another way of putting it, too many agents have a say in each other's work, and bureaucratic rigor mortis sets in.

另一种表达是，太多的作用物在彼此的工作里都有话语权，官僚的僵尸开始抬头。