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Abstract: Direct limit and inverse limit are the methods producing new algebra in universal algebra.In order to further study the production of the new algebra, authors define the family of duplicate set and duplicate limit,discuss the algebraic duplicate
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文摘:直极限和逆极限是泛代数中生成新代数的方法，为了进一步研究新代数的生成，笔者给出了重集族和重极限的定义，讨论了代数的重极限；其次研究了二重直集族和二重直极限及相应性质，讨论了二重直代数族和二重直代数族的极限. |
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Abstract: Discourse on the practical conditions of appling the large-powergas turbine and the problems of developing gas turbine in china, as well as the technical problems that need to break in designing and manufacturing large-power and perfect-performa
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文摘:论述了大功率燃气轮机在我国的应用条件及开发燃机所存在的问题，以及在设计及制造大功率、高性能燃气轮机方面需突破的技术难题和可行的解决方案。 |
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Abstract: Discrete Wavelet Transform (DWT) is widely used in the fields， such as graph, picture, audio processing,video processing and digital signal processing.Due to its excellent characteristics,it has achieved better effect.
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摘要:小波变换技术已广泛地应用于图形、图像处理，语音处理，视频处理以及数字信号处理等领域。 |
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Abstract: Discuss a technique of oil tube elevator,introduce the constrution,principle,and safety of the new oil tube elevator latcher,and analyse the economic benefit and the apply prospect of the oil tube elevator with the exchangeable erescent elevator
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文摘:介绍了新型吊卡销的结构和原理与安全性，剖析了可更换小月牙式油管吊卡的经济效益和推广应用前景。 |
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Abstract: Discusses legal status of delegated person in the use system of authorized trademarks,analyses defects of the use system of authorized trademarks on our Trade Mark Law from the contrast between Chinese law and foreign law,and puts forward a sugg
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文摘:讨论了商标授权使用制度中被授权人法律地位，从中外法律的比较中，分析我国《商标法》就商标授权法律规定之不足，并提出了相应的立法建议。 |
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Abstract: Discusses the principle and method of drawing in model space and paper space,analyses their characteristic,shows clearly the difference between the two and their application scope.
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文摘:讨论了模型空间与图纸空间中绘图的原理、方法，分析了它们各自的特点，指出了它们各自的适应场合，可供不同的绘图采用。 |
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Abstract: Displaying design,as a way of space communication,conveys information or disseminates some ideas by means of space and form design,visual images,color,illumination,sound and demonstration.Among its striking art features are the four-dimentional
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文摘:展示设计是以空间与形态设计、视觉形象、色彩、照明、声响与演示为手段，以传达信息或宣扬某种观念为目的的一种空间传播形式.它有着鲜明的艺术特质；四维设计；艺术与科技高度结合；设计程序与设计方法科学化；追求更高的艺术境界.当代展示设计发展趋势表现为：空间布局的灵活性；信息载体的多样性；展示形式的生活化、现代化；更强的开放性、透明性及参与性；强调对效果、效益、效率的追求. |
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Abstract: Does electronical computer based on microprocessors made of silicon chip come to an end?
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文摘:以硅片微处理器为核心的电子计算机要走到尽头了吗? |
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Abstract: Dongying movement in Bohai Bay Basin is an intensely regional tectonic movement occurred during late Paleogene.
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文摘:渤海湾盆地东营运动是一个范围广泛、强度较大的区域性构造运动，处在由盆地的裂陷阶段向坳陷阶段过渡时期。 |
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Abstract: Doppler navigation is a kind of independent navigational system, but its real-time speed measuring precision is comparatively low.
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文摘:多卜勒导航是一种自主式的导航系统，但其实时测速精度较低。 |
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Abstract: Double steel-ball extrusion deep hole solves the matching problem of steel-ball nucellus with workpiece axis, using this technology, extruding deep hole with smaudiameter is attained efficiently with high quality .It has been proved that the spe
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文摘:双珠式挤压深孔有效地解决了钢珠珠心与工件轴心重合的问题，高质高效地实现了较小直径深孔的挤压加工，实践证明，且能实现弯孔的高精加工。 |
