D'ALEMBERT PRINCIPLE IN THE VELOCITY SPACE

According to Newton's dynamical equation of the system of particles, the force is considered to be the function of the coordinate r, velocity and time t, and the various formulae for D'Alembert principle of the velocity space in both the holonomic and nonholonomic systems are deduced by introducing the concept of kinetic energy in the velocity space (i.e. the accelerated energy).

The Accelerated Expansion of the Universe in the Light of the Maximum Ordinality Principle

The main aim of the paper is to present (and at the same time offer) a differ-ent perspective for the analysis of the accelerated expansion of the Universe. A perspective that can surely be considered as being “in parallel” to the tradition-al ones, such as those based, for example, on the hypotheses of “Dark Matter” and “Dark Energy”, or better as a “com-possible” perspective, because it is not understood as being “exclusive”. In fact, it is an approach that, when con-firmed by experimental results, always keeps its validity from an “operative” point of view. This is because, in analogy to the traditional perspectives, on the basis of Popper’s Falsification Principle the corresponding “Generative” Logic on which it is based has not the property of the perfect induction. The basic difference then only consists in the fact that the Evolution of the Universe is now modeled by considering the Universe as a Self-Organizing System, which is thus analyzed in the light of the Maximum Ordinality Principle.

“校政校”协同育人视角下教师教育专业集群建设路径研究——以绥化学院为例

构建教师教育专业集群是深化应用型大学内涵建设和产教融合人才培养模式改革的重要举措。教师教育专业集群建设应遵循共通共联,共享共建;突出应用,强化对接;深化改革,提升质量的原则。搭建“校政校”协同育人平台是教师教育专业集群建设的主要路径,具体包括重构教师教育专业集群的人才培养模式,重组教师教育专业集群的课程体系,重整教师教育专业集群的实践教学条件,重建教师教育专业集群的师资队伍,重塑教师教育专业集群的质量保障体系,重立教师教育专业集群的组织和运行保障机制等。

政治学原理书写的普遍性与中国性

原理是指某一领域、部门或科学中具有普遍意义的最基本的规律或道理,是揭示事物现象背后理由的概念,具有普遍性、根本性、本源性。它为事物现象的解释提供基本框架和依据。政治是人类普遍的社会现象。政治学作为一门独立建制的学科,有其基本原理,并具有普遍性。马克思主义政治学说揭示了人类政治发展的基本规律,具有普遍性价值。政治学作为一门外来的学科,在引进时势必受西方学说的影响。其中的相当部分是基于西方事实现象或从西方的角度提出来的,并不具有普遍性。随着中国式现代化的推进,中国的事实现象要求更新原有的知识版图,从中国事实现象中抽象出一般原理,进而重新书写政治学原理。

党的二十大精神指引下的高校管理育人质量提升路径研究

党的二十大报告指出:“教育是国之大计、党之大计”。高校具有丰富的管理育人资源,但当前部分地方高校存在管理人员的人岗相适度不足、管理理念和育人模式不够先进、管理制度建设方面缺乏创新等问题,面临着社会变革、信息技术升级与价值观冲突带来的意识形态风险挑战。解决这些突出问题,需要在党的二十大精神的指引下不断探索符合新时代特点的管理育人有效路径,积极应对和适应不断变化的新态势、新要求,提升高校管理育人质量,响应党和国家对高等教育培育时代新人、“办好人民满意的教育”的要求。

变质量力学系统万有D'Alembert原理的普遍形式

1 引言万有D'Alembert 原理是建立高阶非完整力学系统运动方程的重要基础之一,由各种不同形式的万有D'Alembert 原理可导出各类高阶运动微分方程.文献[1]给出了万有D'Alembert 原理在常质量情况下的统一形式.

d'Alembert-Lagrange原理在位形空间的一般形式

本文通过坐标变换得到了分析力学中d'Alembert-Lagrange原理在任意位形空间中的简洁形式,并指出这种变换的关键是改变了位形空间的几何结构.

变质量系统相对论性万有 d'Alembert 原理的各种形式

研究了变质量力学系统在相对论情况下的万有ｄ′Ａｌｅｍｂｅｒｔ原理，给出了变质量力学系统相对论性万有ｄ′Ａｌｅｍｂｅｒｔ原理的各种形式。

力学系统的高阶万有D'Alembert原理

从质点系的牛顿动力学方程出发,建立高阶万有D A lem bert原理,并给出该原理的各种形式.

An Efficient Grid Service Discovery Mechanism Based on the Locality Principle

With the explosion of services in grid environment, it＇s necessary to develop a mechanism which has the ability of discovering suitable grid services efficiently. This paper attempts to establish a layered resource management model based on the locality principle which classifies services into different domains and virtual organizations （VOs） according to their shared purposes. We propose an ontologybased search method applying the ontology theory for characterizing semantic information. In addition, we extend the UD- D1 in querying, storing, and so on. Simulation experiments have shown that our mechanism achieves higher performance in precision, recall and query response time.

Classical Electromagnetic Fields of Moving Charges as a Vehicle to Probe the Connection between the Elementary Charge and Heisenberg’s Uncertainty Principle

The radiation fields generated when a charged particle is incident on or moving away from a perfectly conducting plane are obtained. These fields are known in the literature as transition radiation. The field equations derived thus are used to evaluate the energy, momentum and the action associated with the radiation. The results show that for a charged particle moving with speed ν, the longitudinal momentum associated with the transition radiation is approximately equal to ΔU/c for values of ?1- ν/c smaller than about 10-3 where ΔU is the total radiated energy dissipated during the interaction and cis the speed of light in free space. The action of the radiation, defined as the product of the total energy dissipated and the duration of the emission, increases as 1- ν/c decreases and, for an electron, it becomes equal to h/4π when ν = c - νm where νm is the speed pertinent to the lowest possible momentum associated with a particle confined inside the universe and?h is the Planck constant. Combining these results with Heisenberg’s uncertainty principle, an expression that predicts the value of the elementary charge is derived.

导数空间非完整力学系统的Appell型方程及广义的D'Alembert原理

本文引入了 m 阶导数空间及与之相应的广义坐标的概念,将原相对于3N维 Euclid 空间“E_(3N)”的 m 阶非完整系统变为 m 阶导数空间“中形式上的完整系统,导出了包含万有 D'Alembert——Lagrange 微分原理在内的任意阶非完整系统的新型 Appell 方程和广义的 D'Alembert 原理。

Emergence of Friedmann Equation of Cosmology of a Flat Universe from the Time-Energy Uncertainty Principle

Friedmann equation of cosmology is based on the field equations of general relativity. Its derivation is straight-forward once the Einstein’s field equations are given and the derivation is independent of quantum mechanics. In this paper, it is shown that the Friedmann equation pertinent to a homogeneous, isotropic and flat universe can also be obtained as a consequence of the energy balance in the expanding universe between the positive energy associated with vacuum and matter, and the negative gravitational energy. The results obtained here is a clear consequence of the fact that the surface area of the Hubble sphere is proportional to the total amount of information contained within it.

Mach’s Principle, Action at a Distance and Cosmology

Hoyle and Narlikar (HN) in the 1960’s [1] 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003400310031003900330036003000340034000000 -[3] 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003400310031003900330036003000340037000000 developed a theory of gravitation which was completely Machian and used both retarded and advanced waves to communicate gravitational influence between particles. The advanced waves, which travel backward in time, are difficult to visualize and although they are mathematically allowed by relativistic wave equations, they never really caught on. The HN theory reduced to Einstein’s theory of gravity in the smooth fluid approximation and a transformation into the rest frame of the fluid. Hawking [4] 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003400310031003900330036003000350030000000 in 1965 pointed out a possible flaw in the theory. This involved integrating out into the distant future to account for all the advanced waves which might influence the mass of a particle here and now. Hawking used infinity as his upper time limit and showed the integral was divergent. We point out that since the universe is known to be expanding, and accelerating, the upper limit in the advanced wave time integral should not be infinite but is bounded by the Cosmic Event Horizon. This event horizon He represents a barrier between future events that can be observed and those which cannot. We show that the advanced wave integral is finite when He/C, is used as the upper limit of the advanced wave integral. Hawking’s objection is no longer valid and the HN theory becomes a working theory once again.

The Absolute Certainty Principle (ACP) Revolutionizes Quantum Physics

When the ubiquitous quantum, acting as an active principle, generates meteons in the System of the World, the Absolute Certainty Principle (ACP) regulates the characteristics of their motion. This newly uncovered law of Nature suggests that the cosmos is filled with an “aether”, as Newton and others—even Einstein!—called it in their days, and explains quite simply why we stand erect vertically on the surface of the Earth and why the universe is in expansion.

Undergraduate Business English Course Goals and Teaching Principles in the New Period

With the continuous acceleration of the global informatization process, many universities in China have set up a businessEnglish course. However, because the positioning of this subject is not clear and accurate, and the corresponding teaching require-ments are also different, it has led to a variety of university courses for this subject, so the teaching strategies are also not the same.Due to the particularity and importance of university business English, this paper combines the actual conditions of contemporarystudent development and the development needs of the society to define the objectives of the business English curriculum, andgives teaching principles and curriculum objectives that some college business English education should be followed.

The Principle of Differentiation into Physical and Mathematical Theories

The article formulates the main principle of physics, which underlies this science. This principle has been called by the author of this article the Principle of differentiation into physical and mathematical theories. The article gives examples of the application of this principle in quantum mechanics and cosmology. A more detailed proof of the principle of equivalence of the electromagnetic field and the field of strong interaction to a free material particle is given. This principle, formulated in the article “Electrodynamics in Curvilinear Coordinates and the Equation of a Geodesic Line”, revealed the nature of the mass of elementary particles and became the basis for the formulation of the Principle of differentiation into physical and mathematical theories.

On the “Online and Offline Blended Teaching” Mode for Ideological and Political Theory Courses in Universities—A Case of “Introduction to Basic Principles of Marxism”

With the deepening development of educational informatization, online and offline blended teaching, as a new teaching mode, is increasingly receiving widespread attention from educators [1]. At present, the reform of the “online and offline blended teaching” of ideological and political education courses directly affects the quality of talent cultivation in universities. The article takes the course “Introduction to Basic Principles of Marxism” as an example to explore the reform mode of “online and offline blended teaching” in ideological and political theory courses in universities from the aspects of reasonable allocation of class hours, design of online teaching activities, how to deepen classroom teaching offline, and diversified assessment modes. Furthermore, the article summarizes the experience of mode reform and promotes the deep development of the people-oriented education concept in ideological and political courses in universities, so as to achieve the ultimate goal of moral education in ideological and political education in universities.

First-principles calculation of transport property in nano-devices under an external magnetic field

The mesoscopic quantum interference phenomenon （QIP） can be observed and behaves as the oscillation of conductance in nano-devices when the external magnetic field changes. Excluding the factor of impurities or defects, specific QIP is determined by the sample geometry. We have improved a first-principles method based on the matrix Green＇s function and the density functional theory to simulate the transport behaviour of such systems under a magnetic field. We have studied two kinds of QIP： universal conductance fluctuation （UCF） and Aharonov Bohm effect （A-B effect）. We find that the amplitude of UCF is much smaller than the previous theoretical prediction. We have discussed the origin of difference and concluded that due to the failure of ergodic hypothesis, the ensemble statistics is not applicable, and the conductance fluctuation is determined by the flux-dependent density of states （DOSs）. We have also studied the relation between the UCF and the structure of sample. For a specific structure, an atomic circle, the A-B effect is observed and the origin of the oscillation is also discussed.