Vertical rotation effect on turbulence characteristics in an open channel flow

This paper solves the three-dimensional Navier-Stokes equation by a fractional-step method with the Reynolds number Reτ=194 and the rotation number Nτ=0-0.12. When Nτ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When Nτ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.     

中外物理教育研究与发展的初步比较

教学期刊论文的情况是教学情况的一种反映．国内外的物理教育研究期刊分别为《物理教学》、《大学物理》、Physics Education，The Physics Teacher和American Journal of Physics．文章利用物理教学期刊论文，分别从论文的形式(前言、摘要和参考文献)和内容两方面对中国与国际的物理教育研究与发展开展了初步的比较研究，通过利用教育理论对统计资料的解释初步揭示了国内外物理教育研究的差距，为它们的进一步发展提供了启发性和指导性的建议．     

Simulation of Experiment on Measurement of Neutron Lifetime Using the Big Gravitational Trap of Ultracold Neutrons with the Absorber

Technical Physics - At present, the experiment on measuring neutron lifetime using a big gravitational trap is being performed at Petersburg Nuclear Physics Institute. It is planned to achieve a...     

基于大学物理实验第二层次教学的学生创新能力培养探讨

从第二层次大学物理实验教学、全国大学生物理学术竞赛和大学生创新能力培养之间关系的角度,分析了大学物理实验第二层次教学和大学生物理学术竞赛中存在的学生能力培养不足的问题.提出了在大学物理第二层次实验教学中,通过深挖学生创新能力培养的内涵,并与全国大学生物理学术竞赛成果相融合来提高学生创新能力培养的途径.     

Symmetry in physics

The role of symmetry in Physics, especially in Nuclear Physics, is briefly reviewed.Received: 31 January 2003, Published online: 17 February 2004PACS: 02.20.Sv Lie algebras and Lie groups - 21.60.Fw Models based on group theory     

我国医学物理工作者的任务

医学中的物理学问题涉及把物理学的概念、理论和方法应用于人类疾病的预防、诊断、治疗和康复的全过程．因此，由物理学和医学结合而形成的医学物理学科必须按照一个一级学科规范要求做出定义，使得这个专业的学生能够在与其他学科大体相当的时间内完成学业，成为这方面的专门人才．世界上50多年来形成并快速发展的医学物理学科已经定义了自己的学科范围和内容，人们可以从中获得启发．现在世界医学物理学的主流仍然是医学影像物理学和肿瘤放疗物理学，但是物理学的各个分支学科都已经和正在形成与医学结合的新的发展方向．很多新技术，例如超声技术、激光技术、纳米材料技术、电磁波技术、磁共振技术、同位素技术、光源和射线探测技术等等，也都是医学物理学科中广泛使用的关键技术．文章从医学的需求角度，把医学中的物理问题归纳为诊断、治疗、医疗装置和医学软件四个方面，并由此分析了医学物理工作的任务．     

《物理学》与汉语物理名词术语——饭盛挺造《物理学》对我国近代物理教育的影响

近代物理学在我国的本土化过程中，由饭盛挺造编纂、藤田丰八翻译、王季烈重编的《物理学》产生过很大的作用和影响．本文通过对《物理学》的版本、收藏情况的调查及清末物理学术语使用情况的研究，探讨了该书对我国近代物理学教育和物理学教科书编写的影响，说明了其对近代汉语物理学名词的形成和确立产生的促进作用．     

开放性大学物理实验与大学生创新项目

开放性大学物理实验作为大学物理实验的改革方向及当代大学物理实验的重要组成部分,在我国大部分高校正在开展,也得到了各高校的重视。大学生创新项目作为高校科技处或者教务处组织的大学生活动,在培养大学生的创新能力方面起到非常重要的作用。本文介绍了开放性大学物理实验的作用与特点、大学生创新项目的人才培养作用,结合我院实际情况,提出了开放性大学物理实验与大学生创新项目的相辅相成作用。本文认为开放性大学物理实验与大学生创新项目结合,可以对两者的发展都起到非常好的促进作用。     

水火箭的制作与发射——初中物理教学课外活动拓展

物理课外实验能让学生真正动手操作、体验,从而提高学生的物理核心素养.水火箭的制作与发射,蕴含知识面广,发射效果震撼,能让学生对物理与科技的联系有直观深刻的认识.     

Holographic registration of a one-dimensional optical signal using a nonstationary reference wave,and its analysis

We consider a method of holographic registration of laser emission modulated by interaction with an object or a medium whose optical properties vary with time and along one of the coordinates. A reference wave whose frequency varies linearly along a coordinate and with time in the registration plane is used. The method makes feasible the implementation of two-exposure holographic interferometry. Information on the temporal, spectral, and phase characteristics as functions of the coordinate can be obtained during the reconstruction stage.Physics and Spectroscopy Division, Lebedev Physics Institute. Translated from Preprint 131, Lebedev Physics Institute of the USSR Academy of Sciences, Moscow, 1989.     

Review of Investigations of Muon Bundles Generated by Very-High-Energy Cosmic Rays

Physics of Atomic Nuclei - In autumn 2018, the Working group on Hadronic Interactions and Shower Physics (WHISP) had compiled the results of various experiments in which cosmic ray muon bundles...     

INTERNATIONAL CONFERENCE ON COMPUTATIONAL PHYSICS

It will be held during 1-5 June, 1988 in Beijing that Dexel University and Institute of Applied Physics and Computational Mathematics sponson and organize The International Conference on Computational Physics which is also supported by World Scientific Publications in Singapore, National Center for Supercomputing Applications and Sun Microsystems Inc.in the USA, and in Cooperation:with China Association for Science and Technology.     

一流课程建设背景下大学物理线上线下混合课程的建设与实践

大学物理课程是高校理工科专业学生非常重要的一门必修公共基础课,一流本科课程建设对大学物理教学提出了新的要求.本文从教学内容、教学方法、教学手段、考核方式等方面探索了实施大学物理混合式教学较为有效的策略和方法,以期为物理学科一流课程建设助力.     

Selective laser spectroscopy of molecules in matrices. Experiments with porphyrins

A review is presented of experiments on selective laser excitation of luminescence and hole burning in the absorption spectra of porphyrins in amorphous matrices at liquid helium temperatures.Division of Quantum Radiophysics, Lebedev Physics Institute, Academy ofSciences of the USSR, Moscow. Translated from Preprint No. 165 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

低能实验核物理及其应用

简要地介绍了北京大学技术物理系和重离子物理研究所近年来在低能实验核物理及其应用方面的部分研究工作.Some recent studies on the low energy experimental nuclear physics and its applications at the Department of Technicsal Physics and the Institute of Heavy Ion Physics of Peking University are beiefly introduced in this paper.     

基于面向现代工程教育的大学物理实验教学的调查研究

在现代工程教育改革的大背景下,如何对《大学物理实验》进行教学改革以适应新形势下的工程教育是亟需解决的问题。为此,以工程类各领域的专家为调查对象,采用问卷调查方式研究了《大学物理实验》在各工科专业中的具体作用。分析了各领域的专家对物理实验教学、以及物理实验对学生综合素质的影响等方面的意见。该调查结果为深化大学物理实验课程教学改革提供了参考。     

原子分子物理学研究课题的分析

根据近期召开的几届国际加速器和原子分子物理专题会议内容和物理摘耍（ＰｈｙｓｉｃｓＡｂｓｔｒａｃｔ）,分析了原子分子物理学的研究现状和发展趋势,归纳了目前研究的一些课题和今后的研究方向． According to the abstracts of recent international conference on accelerator and atomic-molecular Physics,the author analyses the current of studying situation for the atomic-molecular Physics,futhermore points out its direction in the study of some atomicmolecularphysics.     

A b initio calculation of the growth of Te nanorods and Bi2Te3 nanoplatelets

In this paper the growth mechanism of a Te/Bi2Te3 novel structure is studied by ab-initio calculations. The results show that the growth of Te nanorods is determined by the adsorption energy of Te atoms on different crystalline Te surfaces. The adsorption energy of Te on the Te （001） surface is 3.29 eV, which is about 0.25 eV higher than that of Te on the Te （110）. This energy difference makes the preferential growth direction along the 〈 001 〉 direction. In addition, the higher surface energy of Bi2Te3 （110） and the lattice misfit between crystalline Bi2We3 and Te along 〈 001 〉 direction are considered to explain the growth of the Bi2Te3 nanoplatelets, in which Volmer-Weber model is used. The theoretical results are in agreement with experimental observation.     

The center of nuclear physics data at the All-Russia Research Institute of Experimental Physics

The Center of Nuclear Physics Data (All-Russia Research Institute of Experimental Physics) is a member of the International Nuclear Reaction Data Center Network, operating under the aegis of the International Atomic Energy Agency and founded to coordinate the collection, compilation, and dissemination of data among the world community. The Center of Nuclear Physics Data (CNPD) focuses on the compilation of experimental data on the interaction of charged particles with nuclei for the EXFOR international library. The center’s personnel are currently developing a software package that will make it possible to enter, edit, and record the data in the EXFOR format. The package includes all of the procedures for processing experimental data and ensuring compliance with the specified format.     

The dynamics of polarization

Long-standing problems concerning the structure of the energy-momentum tensor and the thermodynamics of a polarized medium are reexamined in the light of an exact, fully relativistic kinetic model.This article is dedicated to Achille Papapetrou on the occasion of his retirement and forms a part of the Papapetrou Festschrift.On leave of absence from the Theoretical Physics Institute, Physics Department, University of Alberta, Edmonton, Canada.