中小型海水淡化装置及其能量回收技术的开发和应用          下载免费PDF全文

宋代旺  初喜章  王生辉  邱冠华  王海涛  蒋立冬  殷尉 《海洋开发与管理》2018,35(4):93-97

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。  相似文献   

A CASE STUDY ON CONCENTRATION AND DECENTRALIZATION：BEHAVIOR AND DYNAMIC MECHANISM OF SPATIAL EVOLUTION IN METROPOLITAN AREA，NANJING，CHINA   总被引：1，自引：1，他引：0  

ZHUXi－gang  ZHANGJing－xiang 《中国地理科学(英文版)》2002,12(3):212-217

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.  相似文献   

GPS海啸信诞生     

新洲 《海洋世界》2004,(5):11-11

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

ZHOUChangjiu MENGQingchun GUOZhongwen QUWeifen YINBo 《青岛海洋大学学报(英文版)》2002,1(1):93-100

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.  相似文献   

痕旺铀钍的极谱连续测定     

毛怀安 《地质实验室》1991,7(1):28-30

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激电偶极—偶极装置在撒岱沟门的找矿效果     

朱永余 《地质与勘探》1993,29(12):49-52

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。  相似文献   

变磁化方向化磁极理论     

刘晓华  邹新民 《长春地质学院学报》1993,23(1):87-93

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近区瞬变测深法中发射源AB和接收回线的非偶极影响及校正     

李吉松  朴化荣 《长春地质学院学报》1993,23(2):191-196,211

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丽江高美古的二期选址——望远镜地面高度的确定     

钱铜铃汪从云  岑学奋王建成 《云南天文台台刊》2003,(2):75-81

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。  相似文献   

信号流图求解部分分式展开     

马洪明  杨玲 《成都信息工程学院学报》1996,(4)

含有多重极点的有理真分式展开为部分分式，不需要计算低阶导数。列出被求函数的各阶导数的关系式，画出各阶导数作为节点的信号流图。该图无环路，既直观表现出各高阶导数的相互关系及影响的单向性，也使求节点增益的梅森公式特别简便。该方法将求高阶导数问题简化为代数运算，特别适合于编制成计算机程序  相似文献