Browsing by Issue Date, starting with "1973-02"

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中文輸入輸出系統的比較和歸類
(交大學刊編輯委員會, 1973-02)
張系國
本篇的內容，是將目前可能使用在計算機上作中國文字輸入輸出的機械做一分類，並依其使用之特性和各種處理中國文字的方法，價格等作一比較分析，以作為設計中文資料處理系統之參考。
Analysis of Low Frequency Fluctuations in an Arc Discharge Column
(交大學刊編輯委員會, 1973-02)
黃廣志
;
鄭珍利
;
K.C.Huang
;
J.L.Cheng
The main objectives of this paper are the theoretical and experimental investigations of low frequency fluctuations in a weakly turbulent plasma generated by a hollow cathode arc discharge. The dispersion characteristics of the weakly plasma turbulence caused by the electro-static ion cyclotron instability was derived. The derivation of the analysis is based on the kinetic model. The experimental observations were found to be in good agreement with our theoretical predictions.
Study on the Speed of Convergence of the Central Limit Theorem by a Simulation Program
(交大學刊編輯委員會, 1973-02)
蔡中川
;
Jong-Chuang Tsay
Although sufficient mathematical tools are available to prove the correctness of the central limit theorem, it is only proved in an infinite sense, while the speed of convergence of a sum (Sn) of n independent identically distributed random variables to a normal distributed random variable is not easy to find theoretically. This paper describesa simulation program which may be used to simulate the distribution of Sn for any given n. Then the speed of convergence of the central limit theorem can be studied.
Conductivity of an Anisothermal Magnetoplasma from a Quantum-Mechanical Convergent Kinetic Equation
(交大學刊編輯委員會, 1973-02)
賴漢明
;
Hon-Ming Lai
The quantum-mechanical convergent kinetic equation is used to calculate the collisional part of the ac electrical conductivity tensor of a multispecies, anisothermal magnetoplasma in the long wave-length limit. When th temperature ratio of electrons to ions is of the order or higher than 10^3 the usual Coulomb logarithmic contribution is no longer dominant.
Large-Signal Analysis of BARITT Diodes
(交大學刊編輯委員會, 1973-02)
褚冀良
;
施敏
;
J.L.Chu
;
S.M.Sze
Large-signal properties of p+νnp and associated BARITT (Barrier Injection Transit Time)diodes are analyzed. An accurate computer program(Sempak) is used which considers the space-charge balance, dependence of carrier mobilities on impurity concentration and electric field, and carrier generation and recombination. The static properties of BARITT diodes are also considered. General expressions for the flat-band voltage and the differential reactance are obtained. The results show that the p+νnp structure is the best choice which gives optimum performances both in static and microwave characteristics.
Magnetoacoustic Phenomena in SrTiO3
(交大學刊編輯委員會, 1973-02)
蔡建三
;
吳啟宗
;
Jensan Tsai
;
Chhi-Chong Wu
The effects of parabolic and nonparabolic band structures on the propagation of ultrasound in SrTiO3 in the presence of a dc magnetic field have been studied by using a quanium treatment which is valid at high frequencies and in strong magnetic fields. The major interaction between the ultrasound and conduction electrons is via deformation coupling. Results are shown that the absorption coefficient and sound velocity depend strongly on the sound frequency and longitudinal dc magnetic field. At the high field region, some oscillations in the absorption coefficient and sound velocity with the dc magnetic field occur at the high ultrasonic frequencies. These oscillations are interpreted as the so-called "giant quantum oscillations" which can be observed when the seperation between Landau levels is greater than their thermal broadenings in the region of high frequencies. It is also shown that some discontinuities in the absorption coefficient and change in sound velocity occur in the region of strong magnetic fields.
Radial Particle Loss in a Highly Ionized Cylindrical Plasma Column
(交大學刊編輯委員會, 1973-02)
黃廣志
;
K.C.Huang
;
K.Chung
;
E.Levi
The statistical properties of the plasma fluctuations in a long plasma column produced by a hollow cathode arc discharge show that there exist different states of weak plasma turbulence. The transition between these states occurs as a results of charges in the confining magnetic field, the background gas pressure, and the boundary conditions. Associated with such transitions are radial changes in the plasma confinement. A sudden jump in the radial particle loss rates is manifested by the increase of the current collected by Buchelnikova ring-collectors and by the change in the radial density profiles measured by electrostatic probes. A linear stability analysis identifies the weak turbulence with the unstable electrostatic ion-cyclotron mode. This mode appears to be unstable in the parameter regions where the inverse gradientlength, k,the perpendicular wave number k⊥ and the ion Larmor radius ρH at the sum temperature Te+Ti are related as1/ρH≧k≧ k⊥. The radial particles loss rate predicted by this analysis agrees with the observed one.
A New Sensitive Method for Measuring Photosensitive Gas Pollutants by Means of Concentration Modulation
(交大學刊編輯委員會, 1973-02)
胡家倫
;
Chia-lun Hu
In order to discriminate thr IR spectroscopic absorption lines of a certain pollutant from the IR absorption lines of the background molecules(H2O,CO2,etc.), it is proposed here that a flash light is applied to the sampled air such that the concentration of the pollutant under measuring is subject to a step change. This step modulation of concentration can be discriminatively detected from the background noise by a differentiator connected to the output of a spectroscopic IR detector. The final output can be calibrated to read directly the concentration of the pollutant. The improvement of signal to noise ratio due to the background molecular noise has been calculated to be six-order increase in magnitude over the conventional IR spectroscopic schemes. The physical reason for this large improvement is due to the fact that the imposed concentration modulation proposed here is spatially coherent, while the fluctuation of background molecular concentrations is not, therefore the"signal" is additive spatislly while the background noise is not. A practical scheme is described and signal to noise ratios due to background molecular noise as well as due to circuit noise are calculated in detail. Research in the related fields has been surveyed and evaluated.
A Hybrid Method for Solving Parabolic Partial Differential Equations
(交大學刊編輯委員會, 1973-02)
黃瑞龍
;
Lung-Rui Huang
The temperature distribution across an one-dimensional thermally conductive, uniform slab was found at discrete space points using continuous-time, discrete-space(CTDS) technique on the university of Cincinnate AD-4 hybrid computer facilities. In addition, a pure analog computer solution was also investigated, so that a comparison can be made between these two methods.The agreement between the analog and hybrid methods is satisfactorily good.
中文字根之分析
(交大學刊編輯委員會, 1973-02)
謝清俊
;
黃永文
;
林樹
本文討論之主要內容，為分析中文字形結構之方法，其目的在減省計算機輸出中文字型所需之字形儲存空間。此法係將中文視為由字根拼成之二度空間字形，進而提取其共通點，減少重複，並加系統之整理，以求得一類似語文模式(Linguistic Model)之結構。經統計結果，此模式可產生48,713個已有之中國字，若以九千通用字計，可將現用之字形儲存空間減少至二十分之一以下，且對於中文輸入計算機，提供一種新方法。
Some Notes on Uniform Distribution of Sequences of Integers
(交大學刊編輯委員會, 1973-02)
鄭希灝
;
Shi-Haw Cheng
In this paper we discuss the distribution property of any geometric progression ｛ar^n｝with a and r integers and we apply the result for the uniform distribution of sequences of real numbers mod 1.
A Study on Orbits of Artificial Stellites
(交大學刊編輯委員會, 1973-02)
陳煦
;
Chen,Hsu
Technological developments in the fields of rocket propulsion and guidance have made possible the launching of artificial satellites into one of the many possible space orbits. Once a body has been put into an orbit beyond the influence of the atmosphere, its total energy remains constant and equal to that at rocket burnout. The total energy establishes the class of orbit, which may vary from an ellipse to a hyperbola, the circle and the parabola being limiting cases. However, an infinite number of orbits of the same class are possible for a given total energy at a specified point in space, and the heading angle of the velocity vector at rocket burnout must spacify the particular orbit from the many possible orbits passing through this point.
Hankel Matrices and Realizations
(交大學刊編輯委員會, 1973-02)
陳啟宗
;
Chi-Tsong Chen
This paper studies the realization and the identification problems of linear time-invariant lumped systems. It is assumed that the systems to be identified can be reset to the zero states, and that the measured data are free of noise. The introduced method is based on Hankel matrices. The properties of Hankel matrices are first introduced. A new realization algorithm, which is believed to be the simplest possible, is presented. This result is then used in the identification. Both discrete-time and continuous-time systems are studied.
中文字根的貯存和中文字的合成
(交大學刊編輯委員會, 1973-02)
謝清俊
;
杜敏文
;
戚樹紅
在本篇中，主要討論的是中文字根的貯存，由中文字根合成中文字的軟體設計，以及提出一個使合成的字美觀的方法—定字根比重法。
管管作品四首
(1973-03-01)
管管
管管作品四首
(1973-03-01)
管管
管管作品四首
(1973-03-01)
管管
管管作品四首
(1973-03-01)
管管
涼拌
(1973-03-24)
管管
鼓之夜
(1973-06-01)
管管