双抽机组工况图的画法分析

双抽机组热-电负荷关系非常复杂，运行人员难于分配。介绍一种较精确的工况图画法，可以为电厂运行人员提供可靠的基础。     

ε－拟可微规划的Fritz John型条件和Knhn－Tucker型条件

讨论了不等式约束下的ε－拟可微规划的局部最优解问题，给出了这一问题的ＦｒｉｔｚＪｏｈｎ型条件和Ｋｕｈｎ－Ｔｕｃｋｅｒ型条件，本文也是对Ｇｏｒｏｋｈｏｖｉｋ结果的推广     

LTN-72惯导设备在空间遥感器航空校飞中的应用

介绍了一种用于空间遥感器航空校飞的LTN-72惯导参数采集与传输装置。该装置能模拟星上数据管理系统(OBDH)传递包括校飞时间和全部LTN-72惯导参数在内的辅助数据,并具有输出检测信号和自检显示功能。装置经实际校飞使用,效果良好。     

Two years of operational use of Subpixel Automatic Navigation of AVHRR scheme: accuracy assessment and validation

Automated techniques for satellite imagery navigation and co-location are especially required for environmental monitoring activities intensively using satellite data. In this work are presented the results obtained after 2 years of operational use of the Subpixel Automatic Navigation of AVHRR (SANA) scheme. An automatic method for accuracy assessment of satellite navigation techniques, which permits a preliminary evaluation of their performances, dealing with a large collection of test images is also proposed. The navigation accuracy assessment, performed by using a selection of small islands as reference points, is discussed.Results achieved over more than 400 Advanced Very-High-Resolution Radiometer (AVHRR) scenes confirm that the SANA scheme is a very accurate one (computed mean navigation error is generally about one AVHRR pixel). Furthermore, because of its high processing speed, it can be considered a suitable tool for intensive satellite data processing in multitemporal analyses, especially required for environmental studies as well as for operational monitoring purposes.     

简述近期我国硬质合金工业发展趋势

介绍了2005年我国硬质合金行业基本情况,分析了近期行业发展趋势。     

CAL delivery selection criteria and authoring systems

Abstract  In the past, authoring systems have been used to generate computer-assisted learning materials that have often followed the rather restrictive programmed learning format. A number of innovative ways of using recently developed systems to develop CAL packages that include a wider range of learning activities (access to data bases, simulations, interactive video, etc.) are described. Analogous to the concept of a media selection model, a computer delivery mode selection model is presented as an aid to decision making for designers. This increase in flexibility should broaden the applicability of computerassisted learning (CAL) to a wider range of educational objectives and raise the level of the cognitive emphasis in learning packages, as well as facilitate the implementation of visually appealing materials. The paper also implies a standard of acceptability for authoring systems.     

Enhanced Oil Recovery: The Synthesis of Anthraquinone [1, 2-C] Alkylisoxazole

Anthraquinone [1, 2-C] methylisoxazole is synthesized from 2-ethylanthraquinone through nitration and treating with oleum. The different methods of 2-ethylanthraquinone nitrated were discussed. The optimum conditions were determined. The structure of the product was confirmed by MS and ¹H NMR.     

Influence of thermal boundary conditions on natural convection in a square enclosure partially heated from below

Natural convection in air-filled 2D square enclosure heated with a constant source from below and cooled from above is studied numerically for a variety of thermal boundary conditions at the top and sidewalls. Simulations are performed for two kinds of lengths of the heated source, i.e., a small and a large source corresponding to 20% and 80% of the total length of the bottom wall, respectively. The Rayleigh number varied from 10³ to 10⁷. Results are presented in the form of streamline and isotherm plots as well as the variation of the Nusselt number and maximum temperature at the heat source surface. Comparisons among the different thermal configurations considered are reported.     

万顷沙西十三涌油轮码头模型试验研究

华隆公司拟在万顷沙西十二涌与十三涌之间兴十三涌３０００Ｔ级油轮港口码头。本文分析了该河段水文泥沙的特性、河道演变趋势及河段稳定性，通过物理模型试验研究及对航道、港池的回淤计算分析，预测工程建成后引起局部水流流态的变化，对水道泄洪、潮排、潮灌的影响，以及港池、航道建成后的泥沙淤积情况。     

A new approach of formation navigation derived from multi-robots cooperative online FastSLAM

A new formation navigation approach derived from multi-robots cooperative online FastSLAM is proposed. In this approach,the leader and follower robots are defined.The posteriori estimation of the leader robot state is treated as a relative reference for all follower robots to correct their state priori estimations.The control volume of individual follower will be achieved from the results of the corrected estimation.All robots are observed as landmarks with known associations by the others and are considered in their landmarks updating.By the method,the errors of the robot posterior estimations are reduced and the formation is well kept.The simulation and physical experiment results show that the multi-robots relative localization accuracy is improved and the formation navigation control is more stable and efficient than normal leader-following strategy.The algorithm is easy in implementation.