最新刊期
卷 15 ， 期 2 ， 1993
- 摘要：This paper analyses test data about the strength behavior of heavy plates collected recently. In this paper,their behavior parameters are obtained by the data. The statistical parameters not only serve as a supplement to the concerned standard but as scientific basis for further analysis.329|13|0更新时间：2023-11-28
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- 摘要：This paper suggests the formula about sky luminance distribution on pseudoovercast sky. After testing and verifying,it is a fact that this formula and actual measure about pseudo-overcast sky luminance distribution are nearly identical. This paper also suggests unified fornula expressing four types of sky luminance distributions(CIE clear sky,pseudo-clear sky,pseudoovercast sky and CIE orercast sky). As a result,it is of great advantage to the calculation of vertical illuminance.1131|11|0更新时间：2023-11-28
- 摘要：The hydration and hardening of the gypsum fluidized furnace slag cement is analysed by XRD and mercury pressure porosous meter combining with macroscopic experimental results. The additive, curing system affect material properties and why the water-tolerance is improved.522|7|0更新时间：2023-11-28
- 摘要：This paper discusses the filtration technique of PS filter-media. It is more systematic study on the fixed-bed filtration technique of PS filter-media, and researching influential factors on the filtration of fixed-bed (upflow and downflow).445|8|0更新时间：2023-11-28
- 摘要：本文对最优化问题分别就f是泛函、向量值函数时,在次似凸(subconvexlike)映射情况下得出了广义的鞍点定理和Kuhn-Tucker条件。580|7|0更新时间：2023-11-28
- 摘要：Displacement of stress-resultants computation technique of semi-rigidly connected steel frames inclucing stiffness matrix method,hand calculation method has been proposed. Hand calculation includes substitute rigid frame method under horizontal loads and moment distribution or decomposed storey method under vertical loads. Connection stiffness for five widely used type has systematically computed and practical values of beam stiffness to column stiffness has been summarized and issued.981|27|0更新时间：2023-11-28
- 摘要：The urbanizing environmental diruption seriously results from ignoring ecological factors by planners and designers. This paper discusses the important functions of ecological factors for improving the urban environment through ecological landscape design,and prensents the basic ecdogical principle of urban landscape design for the urban environment.694|599|0更新时间：2023-11-28
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- 摘要：This paper introduces the clarifying influence of the intertube spacing, the tube arrangement,the heat flux and the working fluid on boiling heat tra(?)sfer of smooth tube bundles. The tube bundles include the arrangements of twin tubes, triple tubes, seven tubes and thirteen tubes. The relative intertube spacing of the tube bundles is from 0. 9 to 3. 3. Experimental results show that the tube position and intertube spacting have no effect on boiling curves for the region of fully-devoloped boiling. And they considerably affect the heat transfer coefficient for the transition region between natural convection and nucleate boiling. In general,the heat transfer coefficient in the transition region for the upper tubes can be enhanced by 0. 5 to 1. 5 times.946|487|0更新时间：2023-11-28
- 摘要：Fractal geometry is a branch of applied mathmatics in 1975,and it is used to describe the surface character of irregular bodies. This paper applies fractal demension to study the micropores structures of lime sand concrete,and concludes that it can be used to describe the microp-ores. Their radii are less than 100A. The fractal demensions of lime sand concrete are measured by MlP(mean indicated pressure) technique. The results have shown that the stronger the autoclaving schedules,the less the fractal demensions of lime sand concrete;the larger the water solid ratio(W/S),the larger the fractal demensions,and the calcium silicate ratio(C/S) has the effect on the fractal demensions of lime sand concrete. A pore structure parameter, mean pore radius is also proposed.514|371|0更新时间：2023-11-28
- 摘要：This paper discusses a calculation method which can be used to increase the measuring speed of weihging system for products. The usual measuring method can only get exact value after the value has been stable, whereas the method discussed in this paper uses a limited number of transient value obtained during measuring time to calculate the stable value. Simulation result shows that the measuring time can be reduce to about one third.587|538|0更新时间：2023-11-28
- 摘要：This paper discusses the drawing approach arrow diagram. After repeated explorations and thinking,a simple and fast drawing approach for arrow diagram is formulated. The approach overcomes the drawback of existing drawing methods. Besides its fastness,it has the advantages of clear presentation of logical relations,easy access to correctness and it can be easily grasped by beginners.1425|667|0更新时间：2023-11-28
- 摘要：Since Graham R. L. and Sloan N. J. A. advanced the concept of the harmonious graph in 1980. Many such researching papers are published. This paper constructs a class of the graph-sieve graph S(n,t),and proves that the sieve graph S(2m+1,t) is harmonious when n=2m+1.478|579|0更新时间：2023-11-28
- 摘要：This paper reviews structure and acquired outcomes of eleven underground muon emulsion chambers constructed within seven years. This paper holds that thick type emulsion chambers haven't an advantage over thin type emulsion chambers on the basis of interaction between high energy muons and absorbent mediums,and detective efficiency of emulsion chambers.474|499|0更新时间：2023-11-28
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