查询词典 periodic law

Generalized Darcy's law was first derived from the study of fluid flow through a solid-fluid mixture,and the saturated permeability tensor of a preform could be predicted by studying its unit cell under periodic boundary conditions.

首先，采用均匀化理论分析了流体在多孔介质内的流动问题，推导出广义达西定律，证明以施加周期性边界条件的单胞为研究对象，可以预测预成型体的渗透率张量，并以单向纤维织物为例，对该方法进行了验证。

For demonstrating about free fall、horizontal cast、stant cast、the conservation law of mechanical energy、the rule of collision、the formula of Centripetal-Force、simple periodic vibration and the vibration graph.etc.

能完成自由落体、平抛、斜抛、机械能守恒、弹性碰撞、完全非弹性碰撞、向心力、简谐振动、振动图象等高中力学实验。

Based on a profound study of the variation law of phase difference between two periodic signals and the ordinary frequency measurement method, this paper presents a new method for comparing frequency standards, which is based on the Lissajous figure.

用传统的李沙育图形法是不能完成对高精度频标比对的，但将等效鉴相频率这一新概念引进，可以使得本来不能完成的高精度频率标准的比对变为可能。

The monodromy matrix of the closed-loop system is represented as a special form by which the periodic control law can be obtained via the solution to a time-inviant Sylvester matrix equation.

通过将闭环单值性矩阵进行一系列转化，周期输出反馈律的求解问题可以转化为一类Sylvester矩阵方程的求解问题。

Law is superior to administrative power, the constitution has the highest authority, and person or group should not outmatch the law; democratic legislation requires that the legislative body should be born of universal and periodic elections and its main tasks include setting up laws and supervising the administration; judicial branch is independent and has high position and authority, also practises judicial review to prevent arbitrary violation of the constitution; check and balance institutions among different branches of the government to prevent that a single branch has too much or monopolistic power.

现代法治虽无划一的模式，各国历史条件和文化传统也存在诸多差别，但所采取的基本原则和制度大体一致，主要是法律大于行政权力，宪法具有至高无上的权威，任何人和团体不得凌驾于法律之上；立法民主，由拥有广泛代表性和定期选举阐述的立法机构制定法律、监督行政；司法独立、拥有崇高地位和权威，并且实行防止随意违宪的司法审查制度；政府各权力机构间实行牵制与平衡，以防止单个机构权力过大。

A measuring system which mainly consists of a high precision motorized translation stage of one dimension, POINT GREY Flea2-14S3 CCD camera and LED light source was designed and constructed. Based on a detailed analysis for experiment results, the periodic changing law of system error of LED facula centroid location in this measuring system was found. The results indicate that based on Flea2-14S3 CCD camera, the random error of facula centroid location is about 0.018 pixels, the system error is about 0.06 pixels, and the total error is about 0.063 pixels (1/15 pixels).

利用高精度一维电动平移台、POINT GREY Flea2-14S3 CCD 相机和LED 光源构建了测试系统，对测试结果进行研究和讨论，发现了测试系统LED 光斑质心定位系统误差的周期性变化规律，计算得到了基于Flea2-14S3 CCD 相机的光斑质心定位随机误差为0.018 pixels，系统误差为0.06 pixels，总体误差为0.063 pixels(约1/15 pixels)，能够应用于以光斑质心检测为手段的测量系统中。

A measuring system which mainly consists of a high precision motorized translation stage of one dimension, POINT GREY Flea2-14S3 CCD camera and LED light source was designed and constructed. Based on a detailed analysis for experiment results, the periodic changing law of system error of LED facula centroid location in this measuring system was found. The results indicate that based on Flea2-l4S3 CCD camera, the random error of facula centroid location is about 0.018 pixels, the system error is about 0.06 pixels, and the total error is about 0.063 pixels (1/15 pixels). According to the total error above, this CCD imager can be widely used in many measuring systems which count on facula centroid subpixel detection.

利用高精度一维电动平移台、POINT GREY Flea2-14S3 CCD相机和LED光源构建了测试系统，对测试结果进行研究和讨论，发现了测试系统LED光斑质心定位系统误差的周期性变化规律，计算得到了基于Flea2-14S3 CCD相机的光斑质心定位随机误差为0.018pixels，系统误差为0.06pixels，总体误差为0.063pixels（约1/15pixels），能够应用于以光斑质心检测为手段的测量系统中。

The geochemical field of elements advanced in the recent years unraveled both the concentration_ dispersion trends of elements in endogenic process corresponding to the periodic law, and the spatial distribution patterns of elements in the Earth.

元素地球化学场揭示了与门捷列夫周期律相适应的、素在内生过程中的聚散趋势和空间分布规律。

Rise and fall periodic law" is historical bewildering trap that monarchy or "man ruling can't jump out.

"兴亡周期率"是君主政治或"人治"所不能跳出的历史怪圈。

The study of the course can make students to understand and grasp the basic theories about periodic law of elements, modern mass structure theory, thermodynamics, chemical kinetics, four kinds of equilibriums of acid-base, oxidation-reduction, precipitation- dissolution and coordination and so on. It can also help students grasp basic chemical experimental skills. It has being tried to cultivate students with correct methods of study and research, with favorable innovation consciousness and with scientific character. And it has being expected to greatly improve students' abilities of analyzing and resolving questions.

通过本课程的学习，使学生理解并掌握元素周期律、近代物质结构理论、化学热力学、化学动力学、溶液中的酸碱平衡、氧化还原平衡、沉淀平衡和配位平衡等基本理论并掌握基本的化学实验技能；培养学生正确的学习和研究方法、良好的创新意识和科学品质，训练学生分析、解决问题的能力。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。