儿童适宜型天然复合蔬菜澄清汁的研制

从天然蔬菜中精选出蕃茄、胡萝卜、蘑菇、苦瓜、芹菜、菠菜制取蔬菜单汁，根据一定的复制原则和复配工艺进行复配，并对复配后的复合蔬菜汁进行了澄清实验，最终得到一种儿童适宜型复合蔬菜汁。     

风光接入下储能系统双层优化模型

提出一种风光接入下储能系统的双层优化模型,综合考虑规划和运行2个不同时间尺度问题的相互影响。外层考虑储能系统配置下的全网总成本,用改进粒子群算法迭代求解;内层考虑储能参与下的电网运行成本,采用CPLEX进行求解。在改进的IEEE 10机39节点系统进行仿真验证,结果表明所提模型可得到合理的储能配置方案,在对比不同情景下的经济指标可得到双储能配置为仿真系统的最佳方案。     

基于塔筒添加螺旋线的风力机降噪性能优化研究

为降低风力机对周围居民的噪声污染,提出一种用于分布式风力机的塔架表面缠绕螺旋线的降噪方案。以S2030翼型风力机为计算模型,以螺旋线高度、螺距、螺头数、覆盖范围及旋向为因素,近尾迹辐射噪声总声压级为评价指标进行正交试验,在额定工况下利用ANSYS Fluent数值模拟平台LES/FWH方法进行数值计算。结果表明：螺旋线高度h为5.5 mm、螺距P/d为0.5、螺头数N为4、覆盖面积为全部、旋向为逆时针时为最优组合。各因素对总声压级影响的程度由大到小为螺距>高度>覆盖范围>螺头数>旋向。塔架缠绕螺旋线能有效降低200~2000 Hz中高频噪声声压级。降噪效果随轴向距离的增大而增大,最高可降低总声压级13.19 dB（A）。     

广东塘湾铀矿床地质特征及控矿因素

通过对塘湾矿床地质特征及控矿因素进行的分析,查明该区具有有利的铀成矿地质背景和成矿条件,通过进一步工作,有望扩大矿床规模,对周围地区的找矿也具有一定的借鉴意义。     

Leaching Kinetics of Willemite in Ammonia-Ammonium Chloride Solution

The leaching kinetics of willemite in ammonia-ammonium chloride solution was investigated. The effects of the ammonia-ammonium ratio, particle size, temperature, and total ammonia concentration on the leaching rate of willemite were determined. The results show that the optimum ammonia-ammonium ratio is 1:2 over the studied range. The zinc extraction increases with the reduction of particle size and with the increase of temperature and the total ammonia concentration. Leaching kinetics indicate that the grain pore model could be adopted to describe the leaching process, and diffusion is the main rate-controlling step. The apparent activation energy was determined to be 54.47 ± 6.39 kJ/mol and a reaction order with respect to NH₃(aq) was 3.16 ± 0.40, both of which are likely a result of the parallel nature of the chemical reaction and diffusion in porous solids, even if the chemical reaction is not the rate-controlling step.     

Mobility analysis of the typical gait of a radial symmetrical six-legged robot

Radial symmetrical hexapod robots have attracted the attention of the research community because of their flexibility. There is nonetheless still much to study on their kinematics, dynamics and locomotion. In this paper, initially, full body kinematics of a radial symmetrical six-legged robot with statically stable movements are reviewed. The kinematics analysis is made on cooperated swing legs over supporting legs. Using the robot screw theory and exponential product equations, the velocities and accelerations referring to the object reference frame of each robot part are presented in a compact form. This makes it easy to calculate kinetic energy and so to build the dynamics model using the Lagrangian method. Many ways of walking of six-legged robots have been introduced in specialized literature. However, mobility comparison is still open to research. Two main aspects of mobility are analyzed in detail in this paper. The first one concerns the mobility of three statically stable ways of walking (the insect-wave gait, mammal-kick gait and mixed gait) with the same duty factor on the same radial symmetrical hexapod robot. The stability, energy efficiency, turning flexibility, and terrain or environment adaptability among those gaits have been compared. The mixed gait presents important advantages over the other two, while those two are useful for some special terrain conditions where the mixed gait is limited. The second aspect that has been analyzed focuses on the mobility of the body. The body height, measured from the body bottom to the supporting surface, and the stride optimization factors are proposed according to the obstacles’ configuration and the energy optimization. The results of our study can be used for the intelligent locomotion control of some articulated multi-legged robots for walking statically-stably on a complicated surface.Most of our analyses have been successfully verified on the prototype which has been designed by Politecnico di Milano (POLIMI) and Beijing University of Astronautics and Aeronautics (BUAA) and developed by POLIMI in 2007.     

虚拟现实中的人机自然交互技术

虚拟现实技术是当前计算机技术领域发展的新方向，其指利用计算机技术、传感与测量技术、仿真技术和微电子技术等手段构建的一个模拟虚拟世界的技术类型。通过该技术，用户可以接受和响应模拟环境的各种感官刺激，从而与对应环境中的人或物进行交互，并产生身临其境的感受。若想使虚拟现实技术达到上述目标，则需重点关注相应的人机交互技术。文中从当前虚拟现实技术的概念及特征入手，对虚拟现实中的人机自然交互技术进行了探讨。     

基于基本素材及知识点的多媒体教学

在提取电工技术课程基本素材的基础上，制作课程的素材及知识点库，由此产生的辅教课件制作周期短、个性鲜明，便于与传统的教学方式进行协调和统一。     

皂市水利枢纽建设期的投资控制实践

水利工程的投资控制贯穿于工程建设的全过程,即包括建设工程的立项决策、招标投标、设计、实施、结算等五个阶段。经过项目建议书、可行性研究、初步设计三个阶段的审批,项目投资规模已经确定。皂市工程坚持“静态控制、动态管理”的投资控制理念,通过完善投资控制体系、认真执行以项目法人负责制为中心的项目管理体制,建立了一整套行之有效的投资控制工作模式,工程投资一直处于良好的受控状态。