中国电子学会应用声学学会1983年学术活动初步计划

为了便于学术交流,使学术会议开的更好,现将我会1983年的学术活动初步计划列表于下,可能有变动. 检测声学学术会及功率超声专题讨论会,分别于1982年6月和9月开了筹备会并发了征文通知,筹备会上就会议交流的内容、交流的方法及有关事项进行了充分讨论.     

共形不变标量场在Reissner-Nordsttr?m时空的Boulware 态中的重整化能动张量

利用Page-Zannias方法并借助微机和REDUCE语言计算了共形不变标量场在Reissner-Nordsttr?m(R-N)时空中Boulware态的重整化能动张量。 关键词：     

动态Rindler时空中Dirac旋量粒子的四分量波函数及Hawking—Unr…

在动态Ｒｉｎｄｌｅｒ时空中对Ｄｉｒａｃ旋量粒子的动力学行为进行了研究，得到Ｄｉｒａｃ粒子四分量波函数的显式表示。同时还发现，对于一个作变加速直线运动的Ｒｉｎｄｌｅｒ观察者存在一个随时间而变的视界，并将探测到随时间而变的热辐射，辐射温度正比于观察者的瞬时加速度，从而再一次证实了动态Ｒｉｎｄｌｅｒ效应的存在。     

Z→3γ和γγ→γγ极化张量的一般形式

在标准模型下,讨论了Z→3γ衰变和γ→γ散射过程的单圈极化张量的一般形式.利用S₃对称性和规范不变性对这种极化张量进行限制,从而得到一组约束方程.本文介绍了这种方法的主要步骤,并且将W玻色子圈的结果与费米子圈的结果作了比较.     

贷款需求量与利率关系的模糊曲线模型

利用模糊子集的方法,构造一个恰当的隶属度函数,用以分析“贷款需求量-利率”之间的关系。给出了如何调节利率,预测贷款需求量的模糊曲线模型。     

A new type of Lie symmetrical non-Noether conserved quantity for nonholonomic systems

For a nonholonomic system, a new type of Lie symmetrical non-Noether conserved quantity is given under general infinitesimal transformations of groups in which time is variable. On the basis of the invariance theory of differential equations of motion under infinitesimal transformations for t and q_s, we construct the Lie symmetrical determining equations, the constrained restriction equations and the additional restriction equations of the system. And a new type of Lie symmetrical non-Noether conserved quantity is directly obtained from the Lie symmetry of the system, which only depends on the variables t, q_s and \dot{q}_s. A series of deductions are inferred for a holonomic nonconservative system, Lagrangian system and other dynamical systems in the case of vanishing of time variation. An example is given to illustrate the application of the results.     

Crystallization Kinetics Study on Magnetron-Sputtered Amorphous TiA1 Alloy Thin Films

Crystallization kinetics of magnetron-sputtered amorphous TiAl ahoy thin films is investigated by differential scanning calorimetry through isothermal analysis and non-isotherm analysis. In non-isothermai analysis, the Kissinger method and the Ozawa method are used to calculate the apparent activation energy and local activation energy, respectively, in the crystallization processes of amorphous TiA1 thin films. Furthermore, the crystallization mechanism is discussed from the investigation of the A vrami exponent by isothermal analysis. In addition, x-ray diffraction is utilized to reveal the grain orientation and evolution during the crystallization of TiA1 thin fihns.     

交流源作用下介观RLC电路系统量子态随时间的演化

根据量子不变量理论，同时考虑介观电容器极板间电子波函数的耦合作用和电路的耗散,研究介观RLC电路系统在交流电流源作用下动力学的演化过程，并且得到描述系统量子态随时间的演化算符.进一步的分析结果表明，介观RLC电路系统的波函数将由任意的初态演化到一般的压缩态. 关键词： 介观RLC电路 交变电源 不变量理论 时间演化算符     

食品玻璃化转变温度测量方法的比较

利用差示扫描量热仪用经过退火处理的连续扫描法、不经过退火处理的连续扫描法和分步扫描法,对20％和50％蔗糖水溶液的玻璃化转变温度进行了测量。结果显示,退火处理的连续扫描法测量结果最好,测得蔗糖水溶液的玻璃化转变温度大致为-34．6℃,Tg'不受退火温度和溶液浓度的影响。三种方法测得20％蔗糖水溶液的Tg'的差别不大。退火方法和不退火方法测得50％蔗糖水溶液的Tg'差别很大。用两种不同的连续扫描方法做了几组测新鲜西瓜汁玻璃化转变温度的实验,结果在-42--44℃之间。     

Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter

The Neighbor Cell Deposited Energy Ratio （NCDER） is a new method that is proposed to reconstruct incidence position in a single layer for a 3-dimensional imaging electromagnetic calorimeter （ECAL）. This method was applied to reconstruct the ECAL test beam data for the Alpha Magnetic Spectrometer-02 （AMS-02）. The results show that this method can achieve an angular resolution of 7.36±0.08°/√E＋0.28±0.02° in the determination of the photon＇s direction, which is much more precise than that obtained with the commonly-adopted Center of Gravity （COG） method （8.4±0.1°/E＋0.8±0.3°）. Furthermore, since it uses only the properties of electromagnetic showers, this new method could also be used for other type of fine grain sampling calorimeters.