中小型海水淡化装置及其能量回收技术的开发和应用

海水淡化是解决沿海地区淡水资源短缺问题的重要途径,目前我国适用于海岛、舰船和钻井平台等工况的中小型海水淡化装置及其能量回收技术还不完善。文章分别介绍手持式、自增压式和撬装式(船用、岛用和风光油储一体化)中小型海水淡化装置系列的技术特点,并按类别分别介绍装置关键技术即能量回收技术的工作原理,提出研发中小型海水淡化装置与能量回收一体机的系列化产品可有效降低能耗、促进技术进步和满足国内需求。     

基于高斯烟羽模型的船舶尾气扩散研究

为有效对港区大气污染进行治理、分析船舶尾气,本文详细介绍了一种基于高斯烟羽模型,通过MATLAB模拟仿真模型,其包括实验仿真过程、技术原理及理论模型对船舶尾气扩散进行的研究。该模型是在传统的高斯烟羽模型的基础上,通过对实源像源进行加权选择输入参数;通过矢量合成确定了气体扩散的方向,利用合成后的"风速"进行计算仿真,有效模拟了船舶尾气在港区或者海洋环境中的气体扩散模型。其模型简单且可以有效模拟船舶尾气扩散。并且进一步对后续模型的精确优化进行分析。     

A CASE STUDY ON CONCENTRATION AND DECENTRALIZATION：BEHAVIOR AND DYNAMIC MECHANISM OF SPATIAL EVOLUTION IN METROPOLITAN AREA，NANJING，CHINA

In rapid socio-economic development,the process of concentration and dispersal of various elements tends to be more dramatic,tremendously influencing the shaping and transformation of the space in metropolitan area.Survey of spatial concentration and decentralization has thus become a basic method in examining metropolitan spatial evolution.In this research,three elements were selected as the essential indicators of the process:demographic density distribu-tion,employment density distribution and business office location.Performance of these elements in Nanjing City was exam-ined historically.As Nanjing City could be regarded as a representative of metropolitan areas in China,its situation large-ly suggestes the general characteristics in similar areas of China.Hence based on the investigation of Nanjing City,four general implications were highlighted.First ,metropolitan areas in China are in a violent process and shift of spatial concentra-tion and decentralization.Second,from now to at least the near future,concentration will continue to be the central fea-ture.Third,the landscape of metropolitan areas basically exhibits a dual structure character.The gap in environmental and ecological qualities among different districts will continue for a long time.Fourth,Central Business District (CBD) is playing an important role in helping to convert the traditionally single-centered city structure into a polycentric one.     

Incorporation of Perception-based Information in Robot Learning Using Fuzzy Reinforcement Learning Agents

Robot learning in unstructured environments has been proved to be an extremely challenging problem, mainly because of many uncertainties always present in the real world. Human beings, on the other hand, seem to cope very well with uncertain and unpredictable environments, often relying on perception-based information. Furthermore, humans beings can also utilize perceptions to guide their learning on those parts of the perception-action space that are actually relevant to the task. Therefore, we conduct a research aimed at improving robot learning through the incorporation of both perceptionbased and measurement-based information. For this reason, a fuzzy reinforcement learning (FRL) agent is proposed in this paper. Based on a neural-fuzzy architecture, different kinds of information can be incorporated into the FRL agent to initialise its action network, critic network and evaluation feedback module so as to accelerate its learning. By making use of the global optimisation capability of GAs (genetic algorithms), a GA-based FRL (GAFRL) agent is presented to solve the local minima problem in traditional actor-critic reinforcement learning. On the other hand, with the prediction capability of the critic network, GAs can perform a more effective global search. Different GAFRL agents are constructed and verified by using the simulation model of a physical biped robot. The simulation analysis shows that the biped learning rate for dynamic balance can be improved by incorporating perception-based information on biped balancing and walking evaluation. The biped robot can find its application in ocean exploration, detection or sea rescue activity, as well as military maritimeac tivity.     

BPM载频产生器的研制

介绍ＢＰＭ短波授时台新的载频产生器的设计与实现，该ＢＰＭ载频产生器以原子频标的５ＭＨｚ标频信号为参考，利用频率合成技术，产生出供发射机使用的２．５ＭＨｚ、５ＭＨｚ，１０ＭＨｚ、１５ＭＨｚ和２０ＭＨｚ五种高准确度的载频信号。这些信号既能单独输出，也可利用面板控制或遥控选择输出。为了保证系统的可靠性，采用了两冗余结构，并设置了必要的报警与指示。     

激电偶极—偶极装置在撒岱沟门的找矿效果

本介绍撒岱沟相矿区应用激电偶极－偶极装置的找矿效果。通过对其成果分析和钻探证实：利用该装置所获资料，不仅能从断面上直观地推测出极化体的分布及产状变化，还能从不同深度的ηｓ平面成果中分析出极化体在地下空间赋存状态的基本轮廓。     

丽江高美古的二期选址——望远镜地面高度的确定

在丽江高美古前期选址工作的基础上^[1-2]，二期选址的望远镜地面高度的确定工作于2000年11月3日至2000年12月16日进行，采用30m铁塔的温度脉动测量装置，对6#选址观测点的近地面大气湍流进行反复多次测量，得到近地面不同高度(4-30m和8-22m)上每夜温度结构系数CT^2的平均值，对观测取得的资料作进一步处理和分析，得到高美古6#观测点的望远镜地面高度为13～15m。     

恒星内部电荷屏蔽对β衰变率的影响

针对低能反应和共振跃迁,分析了在恒星内部电荷屏蔽对β衰变率的影响．对共振跃迁的分析是基于核的壳层模型．作为例子,详细计算了电荷屏蔽对56Cr的β衰变的影响．结果表明:在较低温度和高密度下,电荷屏蔽使β衰变率有明显的增加。这对恒星晚期演化和超新星爆发研究可能会有重要的影响。