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Renovated water reuse for rapid infiltration system

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Journal of environmental Sciences 1993年第1期5卷 63-67页

作者： Li Ruqi, Duan Zhenbo Gao ErjingBeijing Municipal research institute of environmental Protection, Beijing 100037, ChinaWu XueqingBeijing Agronomy institute, Beijing 102208, China

The renovated water in the rapid infiltration system (RI) as area for fish and duck farming is feasible. The flesh of fish and duck is edible. The farming of fish for 5 months and duck for 120 - 130 days can be accepted. It is beneficial to environment and economy, especially in developing countries. The production of fish and duck can make up for the cost of wastewater treatment.

关键词： wastewater treatment rapid infiltration water reuse.

Chinese guidelines for diagnosis and treatment of prostate cancer 2018 (English version)

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Chinese Journal of Cancer research 2019年第1期31卷 67-83页

作者： national health Commission of the People’s Republic of China national health Commission of the People’s Republic of China

Contents1. Overview2. Risk factors of prostate cancer2.1 Age and genetic factors2.2 Exogenous factors3. Pathological classification and grading system4. Diagnostic evaluation4.1 Monitoring and screening for population with high-risk prostate cancer4.2 Genetic testing4.3 Digital rectal examination (DRE)4.4 Magnetic resonance examination4.5 Bone scan examination.

关键词： English version Chinese guidelines treatment

Strain-induced Microstructure Refinement in a Tool Steel Subjected to Surface Mechanical Attrition Treatment

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Journal of Materials Science & Technology 2010年第3期26卷 258-263页

作者： Shoudan Lu,Zhenbo Wang and Ke Lu Shenyang national Laboratory for Materials Science,institute of Metal research,Chinese Academy of Sciences,Shenyang 110016,China Shenyang national Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A nanostructured surface layer has been fabricated on an AISI H13 tool steel by means of surface mechanical attrition treatment （SMAT）.Strain-induced refinement processes of ferrite grains and carbide particles have been investigated by transmission electron microscopy （TEM） and scanning electron microscopy （SEM） in the SMAT surface *** refinement of ferrite is found to be dominated by dislocation activities and greatly facilitated by a large number of carbide particles at a depth 〉20 μ*** comparisons with microstructure refinement processes in other SMAT ferrite steels indicate that a larger volume fraction of carbide particles with a lower shear strength is expected to facilitate the refinement process of ferrite grains.

关键词： Nanostructured and nanocrystalline material AISI H13 tool steel Grain refinement Surface mechanical attrition treatment (SMAT) Carbides

Selenium and Cardiovascular Diseases-An Update

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Biomedical and environmental Sciences 1997年第2期10卷 220-226页

作者： JUSSI K. HUTTUNEN (national Public health institute, Mannerheimintie 166,FIN-00300 Helsinki, Finland) national Public health institute Helsinki Finland.

Dietary deficiency of seleniurn has been incriminated in the etiology of cardiovascular diseases. Thus, cardiomyopathy associated with low selenium intake has been described in areas of exceptionally low selenium intake and in patients receiving total parenteral nutrition. Epidemiological studies have provided some evidence for the role of selenium deficiency in the etiology of atherosclerotic disease. An inverse association between the incidence of ischaemic heart disease and selenium intake has been described in population comparisons. The results of longitudinal studies within populations are conflicting. While some investigations have observed a relationship between low serum-selenium levels and the risk of coronary disease, others have not. Final evidence for the role of selenium in preventing atherosclerotic disease can be obtained only from controlled prevention trials

关键词： Selenium and Cardiovascular Diseases-An Update CVB

Decrease trend of dust event frequency over the past 200 years recorded in the Malan ice core from the northern Tibetan Plateau

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Chinese Science Bulletin 2005年第24期50卷 2866-2871页

作者： WANG Ninglian Key Laboratory of Cryosphere and Environment, Cold and Arid Regions environmental and Engineering research institute, Chinese Academy of Sciences, Lanzhou 73000, China institute of Tibetan Plateau research, Chinese Academy of Sciences, Beijing 100085, China Key Laboratory of Cryosphere and Environment Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China institute of Tibetan Plateau research Chinese Academy of Sciences Beijing China

By analyses of the dust layers in the Malan ice core from the northern Tibetan Plateau, it was found that dirty ratio in this core might be a good proxy for dust event frequency. The variations in the dirty ratio displayed a de- crease trend over the past 200 years, which implies that dust events became less frequent during the study period. The decrease trend in the variations in dust event frequency might be caused mostly by the natural processes, including increasing precipitation and weakening westerly which might be related with global warming. Furthermore, significant negative correlation was found between the dirty ratio and δ 18O in the Malan ice core. This is highly important for studying the effect of atmospheric dust on climate change.

关键词：青藏高原马伦冰核气候变化扬尘事件发生频率

A Simulator for Producing of High Flux Atomic Oxygen Beam by Using ECR Plasma Source

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Journal of Materials Science & Technology 2004年第6期20卷 759-762页

作者： Shuwang DUO, Meishuan LI and Yaming ZHANGShenyang national Laboratory for Materials Science, institute of Metal research, Chinese Academy of Sciences, Shenyang 110016, China Shenyang Natl. Lab. for Mat. Sci. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

In order to study the atomic oxygen corrosion of spacecraft materials in low earth orbit environment, an atomic oxygen simulator was established. In the simulator, a 2.45 GHz microwave source with maximum power of 600 W was launched into the circular cavity to generate ECR (electron cyclotron resonance) plasma. The oxygen ion beam moved onto a negatively biased Mo plate under the condition of symmetry magnetic mirror field confine, then was neutralized and reflected to form oxygen atom beam. The properties of plasma density, electron temperature, plasma space potential and ion incident energy were characterized. The atomic oxygen beam flux was calibrated by measuring the mass loss rate of Kapton during the atomic oxygen exposure. The test results show that the atomic oxygen beam with flux of 1016-1017 atoms-cm-2·s-1 and energy of 5-30 eV and a cross section of φ80 mm could be obtained under the operating pressure of 10-1-10-3 Pa. Such a high flux source can provide accelerated simulation tests of materials and coatings for space applications.

关键词： Atomic oxygen Low earth orbit space environment ECR plasma Microwave

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广州白云站

建筑实践 2024年第4期 128-129页

作者： China Railway Siyuan Survey and Design Group Co.,Ltd. Architectural Design & research institute of SCUT Co.,Ltd. Guangzhou Urban Planning & Design Survey research institute Co.,Ltd. Nikken Sekkei Consortium 中铁第四勘察设计院集团有限公司华南理工大学建筑设计研究院广州市城市规划勘测设计研究院株式会社日建设计

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Preparation of Nickel Materials with Fractal Structure

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Journal of Materials Science & Technology 2003年第3期19卷 229-231页

作者： Ruichun WANG, Jingdong GUO Benlian ZHOUShenyang national Laboratory for Materials Science, institute of Metal research, Chinese Academy of Sciences, Shenyang 110016, China Lab. for Mat. Sci. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

A way of manufacturing nickel material with fractal structure has been studied. Some algae with natural fractal structure were used as the basic substrates. The nickel was coated on the substrates by both electroless deposition and electrodeposition. After elimination of the foundational algae by erosion, dissolution etc, the pure nickel materials with fractal structure were obtained. At last, the specific surface area was analyzed by BET analyses and the fractal dimension of the nickel material was calculated by means of box-counting technique. The comparison of fractal dimension between Ni structure and natural algae was also given.

关键词： Fractal Nickel Algae Box counting

First-Principles Study of the Polar TiC/Ti Interface

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Journal of Materials Science & Technology 2003年第6期19卷 540-544页

作者： Limin LIU, Shaoqing WANG and Hengqiang YEShenyang national Laboratory for Materials Science, institute of Metal research, Chinese Academy of Sciences, Shenyang 110016, China Lab. for Mat. Sci. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

The interface structure, work of adhesion, and bonding character of the polar TiC/Ti interface have been examined by the first-principles density functional plane-wave pseudopotential calculations. Both Ti- and C-terminated interfaces including six different interface structures were calculated, which present quite different features. For the Ti-terminated interface, the interfacial Ti-Ti bond has a strong metallic and weak covalent character; while for the C-terminated interface, the interfacial bond is a strong polar covalent interaction between the Ti-3d and C-2p orbital. The work of adhesion of C-terminated interface is nearly 9 J/m2 stronger than that of the Ti-terminated. It is found that each termination has relatively large work of adhesion, which is consistent with other polar interfaces.

关键词： First-principles Metal/ceramic interface Adhesion Carbides