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| 1 | Late Paleozoic Fluid Systems and Their Ore-forming Effects in the Yuebei Basin,Northern Guangdong,China显示文摘Based on detailed and systematic researches of the geology of ore deposits, fluid inclusions and isotope geochemistry etc., and regarding the Late Paleozoic fluid system of the Yuebei Basin as an integrated object in this paper, we have revealed the temporo-spatial evolution law of the basin’s fluid system and discussed its ore-forming effects by simulating and analyzing the distribution of ore-forming elements, the fluid thermodynamics and dynamics of evolution processes of this basin. The results show that Late Paleozoic ore-forming fluid systems of the Yuebei Basin include four basic types as follows. (1) The sea floor volcanic-exhalation system developed during the rapid basin slip-extension stage in the Mid-Late Devonian, which affected the Dabaoshan region. It thus formed the Dabaoshan-type Cu-Pb-Zn-Fe sea floor volcanic-exhalation sedimentary deposits. (2) The compaction fluid system developed during the stable spreading and thermal subsidence-compression stage of the basin in the Mid-Late Devonian. The range of its effects extended all over the whole basin. It resulted in filling-metasomatic deposits, such as the Hongyan-type pyrite deposits and pyrite sheet within the Fankou-type Cu-Pb-Zn-S deposits. (3) The hot water circulation system of sea floor developed during the stage of basin uplifting and micro-aulacogen from the late Late Carboniferous to Middle Carboniferous. The range of its effects covered the Fankou region. It thus formed MVT deposits, such as the main orebody of the Fankou-type Pb-Zn-S deposits. (4) The gravity fluid system developed during the stage of fold uplifting and the basin closed from Middle Triassic to Jurassic, forming groundwater hydrothermal deposits, e.g. the veinlet Pb-Zn-calcite orebodies of the Fankou-type Pb-Zn-S deposits. Migration and concentration of the ore-forming fluids were constrained by the state of temporo-spatial distribution of its fluid potential. Growth faults not only converged the fluids and drove them to move upwards, but also the fluids often crossed the faults to the edges of the basin at the bottom of these faults and the lithologic interfaces, and even migrated to the basin’s edges from top to bottom along the faults, which may be one of the basic reasons for the stratabound deposits to cluster mainly along the contemporaneous faults on the inner border of the basin. The superposed mineralization resulting from the multi-stage activity of contemporaneous faults and ore-forming fluid systems in the basin may be one of the key factors for forming superlarge ore deposits. | DENG Jun YANG Liqiang SUN Zhongshi WANG Jianping WANG Qingfei CHENG Xueming ZHOU Yinghua | 2005 | Acta Geologica Sinica(English Edition)2005，79，5： | 6 |
| 2 | Responses of CO2 efflux from an alpine meadow soil on the Qinghai Tibetan Plateau to multi-form and low-level N addition显示文摘 | Huajun Fang Shulan Cheng Guirui Yu Jiaojiao Zheng Peilei Zhang Minjie Xu Yingnian Li Xueming Yang | 2012 | Plant and Soil (-)2012，，1： | 1 |
| 3 | PLBP:An effective local binary patterns texture descriptor with pyr-amid representation显示文摘 | Qian Xueming Hua Xian-sheng Cheng Ping | 2011 | Pattern Recognition2011，44，1011： | 1 |
| 4 | An Ideal Multi-secret Sharing Scheme Based on MSP 显示文摘 | Hsu Changfang Qi Cheng Tang Xueming | 2011 | International Journal of Information Sciences2011，181，7： | 1 |
| 5 | Low temperature synthesis of SiCN nanostructures显示文摘Silicon carbon nitride (SiCN) nanowires, nanorods and nanotubes have gained much attention due to their excellent field emission and photoluminescence properties. These nanostructures were usually grown using catalysts at high temperature (800―1000℃). In this paper, synthesis of SiCN nanostruc-tures at a temperature less than 500℃ is reported. Various kinds of SiCN nanostructures were synthe-sized using microwave plasma chemical vapor deposition method. Gas mixtures of CH4, H2 and N2 were used as precursors and Si chips were inserted in the sample holder at symmetrical positions around the specimen as additional Si sources. Metallic gallium was used as the liquid medium in a mechanism similar to vapor-liquid-solid. Morphologies of the resultant were characterized by field emission scan-ning electron microscopy. Energy dispersive spectrometry and X-ray photoelectron spectroscopy were used to characterize their compositions and bonding states. | CHENG WenJuan MA XueMing | 2009 | Science China(Technological Sciences)2009，52，1： | 1 |
| 6 | Wind-induced vibration a- nalysis of a cable-stayed bridge during erection by a modified time-domain method 显示文摘 | Cheng Su Xueming Fan Tao He | 2007 | Journal of Sound and Vibration2007，，： | 1 |
| 7 | Multipartite matroids and secret sharing显示文摘In a secret-sharing scheme,a secret value is distributed among a set of participants by giving each participant a share.The requirement is that only predefined subsets of participants can recover the secret from their shares.The family of the predefined authorized subsets is called the access structure.An access structure is ideal if there exists a secret-sharing scheme realizing it in which the shares have optimal length,that is,in which the shares are taken from the same domain as the secrets.Brickell and Davenport proved that ideal access structures are induced by matroids.Subsequently,ideal access structures and access structures induced by matroids have received a lot of attention.Seymour gave the first example of an access structure induced by a matroid namely the Vamos matroid,that is non-ideal.Since every matroid is multipartite and has the associated discrete polymatroid,in this paper,by dealing with the rank functions of discrete polymatroids,we obtain a sufficient condition for a multipartite access structure to be ideal.Furthermore,we give a new proof that all access structures related to bipartite and tripartite matroids coincide with the ideal ones.Our results give new contributions to the open problem,that is,which matroids induce ideal access structures. | HSU ChingFang TANG XueMing CHENG Qi XIAO HaiJun | 2010 | Chinese Science Bulletin2010，55，29： | 1 |
| 8 | An Ideal Multi-secret Sharing Scheme Based on MSP显示文摘 | Hsu Chang-Fang Qi Cheng Tang Xueming | 2011 | International Journal of Information Sciences2011，181，7： | 1 |
| 9 | An Ideal Multi-secret Sharing Scheme Based on MSP显示文摘 | Hsu Ching-Fang Qi Cheng Tang Xueming | 2011 | Information Sciences2011，181，7： | 1 |
| 10 | Wind- Induced Vibration Analysis of a Cable-Stayed Bridge During Erection by a Modified Time- Domain Method显示文摘 | Cheng Su Xueming Fan Tao He | 2007 | Journal of Sound and Vibration2007，303，： | 1 |
| 11 | Prevalence of Alzheimer's disease and other dementing disorders in an urban community of Beijing,China显示文摘 | WENZHI WANG SHENGPING WU XUEMING CHENG | 2000 | Neuroepidemiology2000，19，： | 1 |
| 12 | An Ideal Multi-secret Sharing Scheme Based on MSP显示文摘 | Hsu Ching-Fang Qi Cheng Tang Xueming | | 0，，07： | 1 |
| 13 | Ball Tips of Micro/Nano Probing Systems:A Review显示文摘To satisfy the measuring demands for the micro components of the industry, micro/nano probing systems with various ball tips have been developed. However, most of them cannot be used to measure the real micro geometrical features high precisely because the parameters of the ball tips are not appropriate. The ball tips with a diameter of less than 100 μm, a sphericity and eccentricity of far less than 1 μm are required urgently. A review on the state-of-the-art of ball tips of micro/nano probing systems is presented. The material characteristics and geometric parameters of now available ball tips are introduced separately. The existing fabrication methods for the ball tips are demonstrated and summarized. The ball tips' future trends,which are smaller diameter, better sphericity and smaller eccentricity, are proposed in view of the practical requirements of high-precision measurement for micro geometrical features. Some challenges have to be faced in future, such as the promotion and high-precision measurement for the small ball tip's sphericity and eccentricity.Fusion method without the gravity effect when the molten ball tip solidifying is a more suitable way to fabricate a small diameter ball tip together with a shaft. | Ruijun LI Chen CHEN Dandong LI Kuang-Chao FAN Zhenying CHENG Qiangxian HUANG Xueming DANG | 2017 | Chinese Journal of Mechanical Engineering2017，30，2： | 0 |
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