最新刊期
卷 ， 期 3 ， 1985
- 摘要：Based on the vector computer’s vectorizers, the meaning of the recognition directors is explained, and a better method for its design is proposed.2|13|2更新时间：2025-12-08
- 摘要：The work of cause-selecting control charts is continuing since it’s proposing on 1979. The combination of cause-selecting charts with universal charts is a new breakthrough. In the case of normal distribution.the condition of keeping variance stationary and not varying with the level of noncontrollable causes is cancelled, thus the cause-selecting charts are generalized. In the case of binomial and Poisson distributions, a new type of realization method, i. e. the standard transformation method for pcs, pnCs, ccs and ucs charts is proposed. The angular transformation realization method for pncs chart and the root transformation realization method forucs chart are discussed. The methods have been checked by several practical examples.2|63|1更新时间：2025-12-08
- 摘要：An improved algorithm for finding the principal partition of a linear graph is presented. The concept of harmonious decomposition tree of a graph is introduced, then the methods for finding all harmonious decompositions and the optimal harmonious decomposition of a network graph are described. These methods will favour the application of diakoptics.2|13|2更新时间：2025-12-08
- 摘要：General stability criteria commonly used in the design of sampled phase-locked loops and delay sampled phase-locked loops are derived by using the stability theory for sam-pled-data control systems as well as the z-transform method and its modification. The important relationships of these criteria are also given.2|56|3更新时间：2025-12-08
- 摘要：Remarkable changes of physical and chemical properties are found in exposured 5-Nitroacenaphthene. which is usually used in negative photo-resists as a sensitizer. Analytical results demonstrate that 5-Nitroacenaphthene has undergone photo-reaction during the exposure. Its mainphoto-product is 8-Methy-4-Nitro-l-naphthealdehyde （C12H9NO3. or MNNA for short）. Using these changes of photo-induced properties of 5-Nitroacenaphthene. selective etching on SiO2 is realized and the mechamism of lithography without development is given satisfactory explanation.2|45|5更新时间：2025-12-08
- 摘要：A theoretical and experimental study is conducted for the compact resonance cavity for hydrogen maser. The mothed of variation is used to calculate the upper and lower limits of cut-off wave numbers in circular wave guides loaded with metallic sheets, yielding f0, Q0 and η’ of loaded circular cavities. The results of calculation are found well consistent with those of experiment, and hence are useful in cavity design. Some of the conclusions obtained are different from those of other authors.2|18|1更新时间：2025-12-08
- 摘要：Tantalum nitride field emitters are fabricated by nitrifying a tantalum tip, which give an electron emission current of 210μA at the tip voltage of 6.8 kV and the temperature of 1300℃. with a brightness of 2×108 A/cm2. str and an angular current density of 5× 103 μA/str. The current fluctuation is small at the pressure of 10-8Torr. Typical field emission patterns are presented with a dark region at the center and two symmetrical bright regions on both sides. The composition of tip surfaces is analysed by a scanning Auger mic-roprobe.2|25|1更新时间：2025-12-08
- 摘要：The effects of Si3N4 film on the current gain of npn and pnp transistors are investigated for different film thicknesses and deposition processes. The conditions for maximum current gain improvement are observed. Flatness measurements and the measurements of minority carrier lifetime show that the conditions for maximum current gain improvement correspond to the best stress compensation and the highest minority carrier lifetime.2|51|0更新时间：2025-12-08
- 摘要：In order to adapt the functional programming （FP） system to the environment of distributed processing, a communication functional form is introduced. On this basis a concept of concurrent software machine （CSM） is presented which is represented as a module （i. e. a function） in FP system. CSM as a function may be nested and recursive. They form a CSM network, communicating with one another via message-passing functions genepated by the communication functional forms.3|6|0更新时间：2025-12-08
- 摘要：A mathematical imaging model of ultrasonic holography, its best estimation model and algorithm are discussed. The influence of the background disturbance is analysed, and the way to remove it is explained. Using the models and algorithm, good results are obtained.2|42|1更新时间：2025-12-08
- 摘要：A new three-valued logic （TVL） threshold gate circuit simple in structure and suitable for IC manufacturing is described. A three-valued T gate IC for multiple purposes is designed. Their logic operating patterns are given and the transient response characteristics of the linear AND-OR gates operating in TVL are analyzed. The results show that the Mul-ticell- Type Logic （DYL） circuit structure proposed in China is also very promising for implementation of multi-valued IC’s.2|40|6更新时间：2025-12-08
- 摘要：The maximum likelihood envelope estimation method for extracting speech signals from noisy environment is briefly described. Some modifications are made. With regard to the statistical characteristics of speech, the extension of the method leads to an alternative method the Pseudo-Bayes envelope estimation method. Extensive testing shows that the noise can be made imperceptible for the background noise at S/N ratio of -5dB. The coherent coefficient is used for evaluating the quality of extracted speech.2|62|1更新时间：2025-12-08
- 摘要：A method of complex control of phase-locked loop is presented. Theoretical analysis shows some desirable properties. This method improves not only the working precision without affecting the loop stability, but also the acqusition properties. The possibility of using this kind of phase-locked loop under noise interference and the problems of filter design are discussed.2|58|2更新时间：2025-12-08
- 摘要：The geometrical theory of diffraction （GTD） is used to analyse the principal plane far-field radiation patterns of a shaped subreflector with a conical flange attachment fed by primary feed located at its caustic region. The nonaxial diffraction field and the diffraction field in its axial caustic region are evaluated. In addition to the geometrical optics field from the shaped subreflector and its flange, the diffractions from the wedge formed between the shaped subreflector and the conical flange as well as that of the flange edge are considered. The principal radius of the curvature of the subreflector surface is determined. The computational results show good agreement with experiments.2|11|0更新时间：2025-12-08
- 摘要：The progresses of the distributed processing are reviewed. The related aspects of the system architecture, the distributed database, task allocation, and the distributed software are analysed. And the problems and prospects are discussed.2|15|0更新时间：2025-12-08
- 摘要：The definition, applications of memristors and its realization are introduced briefly.2|346|6更新时间：2025-12-08
- 摘要：This note points out the following mistakes in Ref. [1]. （1） For making qualitative analysis of non-coherent fault trees, the minimal cut sets can not replace the prime implicant sets as failure modes; and （2） the search method proposed by Ref. [1] generally can not guarantee to obtain the prime implicant family or the irredundant prime implicant family for a non-coherent fault tree.2|17|0更新时间：2025-12-08
- 摘要：Some methods are proposed for reducing the internal stress of the ceramic electron tubes based on the experiments of sealing between a ceramic and several new alloys and measuring the stress during the sealing process.4|56|0更新时间：2025-12-08
- 摘要：A circuit for an all-digital frame synchronizing code recognizer, and it’s operation principle arc presented. It is noted that the recognizer is convenient for use in digital teletommunicalion and digital telemetering systems.2|44|2更新时间：2025-12-08
- 摘要：Two special cases of the Karhunen-Loeve transform for the first order Markov process are considered. It is proven in this paper that, the Karhuneti-Loeve transform reduces to the version I of the discrete sine transform as ρ→0, and to the version Ⅱ of the discrete sine transform as ρ→ -1 .2|71|2更新时间：2025-12-08
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