西方世界过去2000年间的噪声控制发展史

如果我们去问一个普通老百姓，噪声是什么时候开始成为你所关心的社会问题的，他或许     

我从事物理学研究的点滴体会

今年的"三·八"国际妇女节,<物理>杂志编辑部向我约稿,这使我作为一名女性科研人员,比男士们多了一个机会,可以说说自己想说的话.     

我从事物理学研究的点滴体会

我从事物理学研究的点滴体会     

我所知道的周光召先生——写在周光召先生从事物理工作55周年

周光召先生是我敬重的师长.上世纪50年代,周先生研究生刚毕业留北京大学任教不久,就成为我和其他4位同学的本科毕业论文导师.在他的指导下,我们研究了在轧钢过程中钢材内热应力的分布,他带领我们一起深入分析每一阶段的计算结果,通过这项研究,我们学会了微分方程的数值解法,锻炼了分析问题的能力,这在我毕业后的研究工作中起了积极作用.     

回忆我在南京大学物理系的时候

我是在１９５２年来到南京大学物理系的。建国初期,新中国遭到西方资本主义世界的敌视和全面封锁,只得向苏联学习,进行了全国高等院校的院系大调整。就是在此形势下,我从浙江大学调到了南京大学。浙江大学的理学院被调整掉了,成为工科性大学。实际上浙江大学的理学院在国内学术上有一定地位,所以对这次调整,浙江大学很有意见,但也没有办法。我到了南京大学物理系后参加了多次会议,?...     

回忆我们在电子偶素方面的研究工作——纪念赵忠尧先生诞辰120周年

1930年,赵忠尧实验观察到正电子湮没释放的辐射,测得一种能量约等于电子质量的特殊辐射。当年,这是精密的核物理实验。赵忠尧是正电子湮没现象的发现者,对正电子发现有重要贡献。两年后,安德逊（Anderson）在云雾室中观察到正电子的行迹,从狄拉克（Dirac）预言正电子至此约4年时间,人们确认第一个反粒子的存在,开启了粒子物理的时代。之后,结合加速器的进步及多个基本粒子的发现,走上高能物理发展的开阔行程。     

激光在医学中应用的回顾与展望

随着激光技术的发展,激光在医学中的应用越来越广泛.文章介绍了以强激光治疗、弱激光治疗、光动力学治疗为主体的临床治疗模式,以及常用的激光诊断技术并详细介绍了激光扫描共焦显微镜的原理和应用,对激光在医学中的应用进行了展望.     

回忆我在所图书馆的工作

中国科学院高能物理研究所是我国从事高能物理研究、先进加速器物理与技术研究及开发利用、先进射线技术与应用的综合性研究基地。其前身是创建于1950年的中国科学院近代物理研究所,后改称物理研究所、原子能研究所。1973年2月,在原子能研究所一部的基础上组建高能所。     

NOVA2000e氮吸附仪在本科实验教学的应用

将NOVA2000e氮吸附仪应用于本科生实验教学,发挥其大型精密仪器在培养学生实验技能和掌握研究方法与实验技术中的作用。阐述了NOVA2000e氮吸附仪在材料专业本科生实验课程"材料分析测试方法"中的实践及应用,包括实验内容的设置、意义及具体实施情况等,旨在促进大型精密仪器与本科实验教学的紧密结合,提升实验教学水平和人才培养质量。     

Physical theory of the competition that allows HIV to escape from the immune system

Competition within the immune system may degrade immune control of viral infections. We formalize the evolution that occurs in both HIV-1 and the immune system quasispecies. Inclusion of competition in the immune system leads to a novel balance between the immune response and HIV-1, in which the eventual outcome is HIV-1 escape rather than control. The analytical model reproduces the three stages of HIV-1 infection. We propose a vaccine regimen that may be able to reduce competition between T cells, potentially eliminating the third stage of HIV-1.     

Short analysis of rainfall trends in Friuli-Venezia Giulia from 1951 to 1986

Summary Annual and seasonal rainfall data taken in the period 1951–1986 have been spatially averaged over the region Friuli-Venezia Giulia and analysed with the aim of searching for the presence of trends. The results of the two rank tests recommended by the World Meteorological Organization (WMO) support the hypothesis of a decreasing trend in the autumn rainfall and, with less probability, an increasing trend in spring.     

Contribution From the Breakup-Fusion Mechanism to the Contin uum Spectra (Part I of Continuum Spectra Research)

Contribution from the breakup-fusion mechanism to continuum spectra of nuclear reaction is introduced.In this mechanism a two-step process is considered in which the projectile breaks up to two pieces in the field of target,and fusion of one piece with the target is followed.A method of finite range calculation is presented.The comparison of theoretical calculation with experimental data is shown for reactions on light and heavy targets bombarded by α-projectile.The results show that the breakup-fusion mechanism mainly contributes to continuum spectra.     

Algebraic approach to the theory of chronological products of currents: Part I

An algebra $\text{F}$ of generating functionals for sets of symmetric n-point functions is investigated. It contains a twosided ideal $\text{T}$ of functionals which vanish on mass-shell. Since scattering processes are described by on-mass-shell values of these functionals, it is proposed to formulate the physical conditions of unitarity, relativity and causality (locality) in terms of elements of the algebra $\text{U}\text{′ =}\text{F}\text{/}\text{T}$ of equivalence classes modulo $\text{T}$. In Part I the extended form of the unitarity and relativity condition is discussed. An example of the algebra of coherent functionals is considered. The causality condition will be treated in the second part of this paper.     

努力拓展物理教学的研究性空间

研究性学习是一种指导学生探索事物的真相、性质、规律的学习，它强调教学过程中师生的“积极互动、共同发展”，让学生学会用研究的眼光去看待学习对象．对于物理教学来说，可以从以下4个层面上做好工作．     

Simulation of the operation of a laminar-flow diffusion chamber to study homogeneous nucleation: Part I

A new mathematical model of the operation of a laminar-flow diffusion chamber that includes the homogeneous nucleation (condensation) and growth of new-phase particles (droplets) is studied qualitatively. It is shown that numerical simulation must correctly take into account the concentration and temperature dependences of transport coefficients in a vapor-gas mixture. The domains of applicability of the previous mathematical models of a laminar-flow diffusion chamber are found.     

Analysis of the CH3D Nonad from 2000 to 3300 cm

As part of the simultaneous analysis of line positions and intensities of the first two polyads of monodeuterated methane, the results achieved for the region 3-5 μm are reported. It involves the three highest fundamentals, (ν₁, ν₂, ν₄), overlapped by overtone (2ν₃, 2ν₅, 2ν₆) and combination (ν₃+ν₆, ν₃+ν₅, ν₅+ν₆) bands. The theoretical model was based on the global tensorial model implemented in the MIRS package. Some 10 000 line positions and 2400 line intensities have been modeled to ±0.000 88 cm⁻¹ and ±3.6% respectively, using measurements obtained at 0.0056 and 0.011 cm⁻¹ resolution with the Fourier transform spectrometer at National Solar Observatory located at Kitt Peak. The strongest band in this polyad is ν₄(E) at 3016.7 cm⁻¹ with a strength of 6.3×10⁻¹⁸ cm⁻¹/(molecule cm⁻²) at 296 K; the weakest band is 2ν₃(E) at 2597.7 cm⁻¹ with a strength of 1.9×10⁻²⁰ cm⁻¹/(molecule cm⁻²) at 296 K. The total calculated absorption arising from the CH₃D nonad is 8.95×10⁻¹⁸ cm⁻¹/(molecule cm⁻²) at 296 K.