Loading...
中文

Table of Content

    25 June 2010, Volume 32 Issue 3
    Previous Issue    Next Issue
    Invited Special Paper
    How to Originate and Evolve for Continental Crust of the Earth—Precambrian Geology: a Mysterious and Interesting Science
    Zhai Ming-Guo
    2010, 32(3):  125-129. 
    Asbtract ( 1803 )   PDF (732KB) ( 912 )  
    Related Articles | Metrics
    The Earth is ca. 4 600 Ma old up to now. 545 Ma is a key boundary mark. The epoch greater than 545 Ma is called Precambrian Era, time range of which is about 4 000 Ma long. The epoch of 545 Ma is termed Phanerozoic Era. Cambrian is the first geological period of Phanerozoic Era. The 80%~90 % volume of continental crust was formed in Precambrian. Oldage continent crust records complicated and supernatural geotectonic history, and contains abundant mineral resources with enormous reserves. Precambrian geology is a branch of Earth sciences that study geological process and ending in precambrian, including early continent forming and evolving.
    Preliminary Study on New Concept of Water Resources Management Under Dualistic Water Cycle Condition
    WANG Hao;YANG Gui-Yu
    2010, 32(3):  130-133. 
    Asbtract ( 1086 )   PDF (1028KB) ( 1371 )  
    Related Articles | Metrics


    Abstract〖WTB1]The main reasons leading to the questions including shortage of water resources, degradation of ecology and deterioration of water environment are the following two aspects: one is the lower natural water resources; the other is faulty of water resource management. Therefore, to the later, the authors preliminarily study a new concept of water resources under currency situation associating with “naturalartificial” dualistic water cycle process, and provide a new concept named core of water consumption and the constrains of the seven total amount controlling index. Meanwhile, the importance and feasibility of the new concept of water resources management are analyzed by comparing with the traditional water resources management and associating with the advantage technology.
    Review Article
    Silicon Solar Cells: New Achievements for Next Generation PV Industry
    SHEN Wenzhong
    2010, 32(3):  134-142. 
    Asbtract ( 1128 )  
    Related Articles | Metrics

    Both the first generation crystalline  Si and the second generation noncrystalline Si thin film solar cells dominate the current photovoltaic (PV) industry. The third generation nanotechnology approaches aim to decrease costs to well below 1.0 USD/W level of second generation PVs to 0.5 USD/W, potentially to 0.2 USD/W or better, by significantly increasing efficiencies but maintaining the economic and environmental cost advantages of thinfilm deposition techniques. In this paper,  we present a brief review on the recent achievements in Si nanocrystalline and nanowire solar cells as the future PV industry may belong to these nanostructured Si solar cells. The emphasis is on hydrogenated nanocrystalline silicon (ncSi:H) tandem thin film solar cells with the band gap tuned by the dot size, the preliminary application of Si nanowire arrays in planar Si solar cells and radial Si solar cell concept including single nanowire Si solar cells, and multiple exciton generation ncSi:H hot carrier solar cells.
    Development of Solar PV System Technology
    ZHAO Chunjiang
    2010, 32(3):  143-148. 
    Asbtract ( 1114 )  
    Related Articles | Metrics
    It has been over half century to apply solar PV system from military to civil, from offgrid to gridconnected. Its efficiency keeps increasing, technology improving, and cost cutting down. At present, there is a great tendency to put solar PV system into application. There are also great requirements for developing microgrid system, smartgrid system and global PV power supply system in order to integrate discrete PV power into the existing power grid.
    Solar Photovoltaic Power： Hope of LowCarbon Economy in China
    CUI Rongqiang
    2010, 32(3):  149-155. 
    Asbtract ( 1031 )   PDF (5005KB) ( 826 )  
    Related Articles | Metrics
    Status and Trends of Thin Film Solar Cells
    ZHAO Ying;DAI Songyuan;SUN Yun;FENG Lianghuan
    2010, 32(3):  156-160. 
    Asbtract ( 1049 )  
    Related Articles | Metrics
    Industrial Crystalline Silicon Solar Cell Technology
    MA Yue;WEI Qingzhu;XIA Zhengyue;YANG Lei;ZHANG Gaojie
    2010, 32(3):  161-165. 
    Asbtract ( 960 )  
    Related Articles | Metrics

    The crystalline silicon solar cell industry has been growing remarkably in the recent ten years, along with continuous improvement on the manufacturing technology. In this paper, we have briefly reviewed the history of solar cell development, the working principle of solar cell, and the process sequence on manufacturing crystalline silicon solar cell. We have introduced several industrialapplicable methods to improve the solar cell performance, such as wafer property optimization, uniform high sheet resistance emitter, advance metallization, and selective emitter. The impact of advance processing on the large scale manufacturing has also been addressed.
    Natural Forum
    Defending Planet Earth：NearEarth Object Surveys and Hazard Mitigation Strategies
    HU Zhongwei
    2010, 32(3):  166-171. 
    Asbtract ( 1231 )  
    Related Articles | Metrics

    The earth inhabits a hazardous environment. “Near Earth Objects（NEO）”，whose orbits approach Earth’s orbit, could pose potential hazard of striking Earth. In fact, since its birth, the earth is continually bombarded by these objects. The scarred countless impact craters from Moon and Mercury are the best evidence. Because of a serious evolution of the Earth and  the remains of the old impact craters being wiped out, only more than 170 impact structures are identified. Fortunately, the impacts from the objects at this stage are mostly in smallscale , their hazards are not too serious. However, an impact event is difficult to predict. Once the event  of a larger impact occurs, they will result in much more serious than the big earthquake hazards. The event of the comet colliding with Jupiter in 1994 shocked the whole world, and  enlightened people to pay more attention to the dangers of the earth by such impact. In fact, there are some recent examples：Tunguska explosion event in 1908; the Jilin meteorite shower in 1976; the asteroid 2008 TC3 fallen in Sudan in 2008. Earlier 2010, the U.S. Academy of Sciences announced, “defend the Earth: nearearth objects survey and mitigation of risk strategy for the final report”. Combined with relevant information，the real scientific knowledge and mitigation of risk strategy are introduced briefly to the public understanding and to avoid seriously misleading from the distorted video.
    Three Roots of Human Origin:Gene,Society and Culture
    LV Baozhong
    2010, 32(3):  172-175. 
    Asbtract ( 1206 )  
    Related Articles | Metrics
    History of Natural Science
    Intimate Contact of Chinese Science and World Exposition
    ZHANG Changfang;LIU Jiafu; ZHANG Juan
    2010, 32(3):  176-179. 
    Asbtract ( 950 )  
    Related Articles | Metrics
    Science Review
    Better Techonlogy Better Life
    XU Han
    2010, 32(3):  180-183. 
    Asbtract ( 926 )  
    Related Articles | Metrics
    Portraits
[an error occurred while processing this directive]