摘要：AT-InSAR(Along Track Interferometric SAR) is a technique to detect slow-moving targets. However, the detection performance is greatly influenced by noise and clutter. In this paper, the influence of noise and clutter on the detecting performance is analyzed. By simulating different background clutter and noise, the performances of the phase threshold and dual-threshold methods are discussed in detail, and then the adaptive-threshold method is proposed which can greatly improve the detection performance.

摘要：The way of reform and development of Engineering Drawing education is explored. Such activities have been carried out for 5 years, and great progress in the update of course contents, teaching methods and other related aspects is achieved. A series of textbooks, multimedia CD and established a Web site for Engineering Drawing course have been published. The efforts to realize an advanced contemporary teaching mode are being made. With the support of multimedia software and resources over Internet, students become the real main body of study, the teaching qualities are supervised and controlled throughout, and the students?imagination and ability of design and drawing are greatly enhanced. All reform is built on digital technology.

摘要：This paper introduces the development and the related work of the assembly oriented computer aided *** a representation scheme of a compound-body to the computer and focuses on the research of computer aided graphic assembly technology for 3-D *** an example,the application of graphic assembly technology to robot modelling is *** shows great potentialities of the technology.

摘要：LT6654专门为在-40～＋125℃的温度范围内准确工作而设计。这个电压基准兼有0．05％初始准确度、10×10^6温度漂移和仅为1．6×10^6的低频噪声。LT6654可在比输出仅高100mV的电源上工作，而且在电源电压高达36V时保持仅为5×10^-6／V的电压调节误差。其他特性：1．6×10^-6PP噪声（0．1～10HZ）；±10mA吸收和供应能力；100mV压差电压；电源电压高达36V；负载调节：8×10^-6／mA（最大值）；电压调节：5×10^-6／V（最大值）；现已提供2．5V电压版本。

摘要：Key techniques to improve the quality of developing Web-based engineering drawing CAI software are discussed and some experience in applying commercial tools for generating vector drawing, concise representation of 3D solids, real-time interactive animation, data management etc. is illustrated. A Web-based Engineering Drawing CAI software 'Solid Projection' has been implemented by using these techniques.

摘要：采用D -近似最优设计法系统地研究了NaOH质量分数、碱处理时间及碱处理温度这三个主要因素对制备壳聚糖的影响 :当碱液质量分数增加时 ,壳聚糖的脱乙酰度增加 ,但其速度却在减小 ,当碱液质量分数达到 40 %时 ,脱乙酰度出现峰值 ,约为 90 % ,而后增加碱液质量分数时 ,脱乙酰度反而下降 ;随着反应温度的升高 ,其脱乙酰度几乎线性递增 ,当温度达到 2 0 0℃附近时 ,曲线趋于平直并且脱乙酰度达到最大 ;随着反应时间的增加 ,脱乙酰度开始呈线性增加 ,当反应时间超过 5 0min后 ,脱乙酰度有下降趋势 ;在一定碱液质量分数 (4 0 % )条件下 ,脱乙酰度随着温度的增加而增加 ,因此 ,若需获得较高质量的壳聚糖 。

摘要："创意源"是创意产业的核心,创意源的设计是整个创意产业体系中最为关键的环节,需要提前根据创意源的3个主要特点和人们的需求性、市场的迎合度来进行设计,使其形成一个可衍生的模式,从而用相似的题材通过相同的模式来取得最大的创意源附加值,在低消耗中实现创意产业的最大经济效益。

摘要：主要针对中国户外广告与城市环境这一问题,就如何控制城市户外广告的数量与质量展开讨论,提出导入DIS规划理念,通过系统处理、控制处理、创新处理等现代管理手段,使城市户外广告达到"相宜之美"、"亲善之美"、"科技之美"的审美标准。

摘要：一、2009年度文化科技工作的回顾2009年，文化部文化科技司全体同志在文化部党组和分管部长领导下，牢牢把握文化科教工作的基础作用、支撑作用、动力作用和提升作用，围绕文化创新、文化科技、艺术科研、艺术教育等四个方面积极缜密地开展工作，圆满完成了年度工作计划，并为下一年度工作的开展清晰了思路，垒高了起点。主要分为四个方面。

摘要：楼盘广告是房地产开发商加大房产销售的重要手段之一,有无好的广告创意则是楼盘广告设计过程中应考虑的核心内容之一。因此提高楼盘平面广告设计师的创意能力显得尤为重要。文章从现阶段我国楼盘平面广告创意中存在的普遍问题做出分析,探讨不足原因及改进措施等内容,给楼盘平面广告设计师以启示。