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| 1 | Geological Characteristics and Ore-forming Time of the Dexing Porphyry Copper Ore Mine in Jiangxi Province显示文摘The Dexing porphyry copper ore mine is located in the Qin-Hang metallogenic belt between the Yangtze block and the Cathaysia block. It is a giant porphyry copper mine in China, including 3 ore districts: Tongchang, Fujiawu and Zhushahong. Our analyses of Re in molybdenite indicate that the ore-forming material of the copper ore deposits in Dexing should be mainly mantle-derived. Our study fills in a gap in the study of formation time of the Dexing copper mine, and further proves that the copper ore deposits in the three ore districts should be formed simultaneously, about 170 Ma, belonging to the early Yanshan period, and that the formation time of the copper ore deposits should be consistent with the formation time of granodiorite porphyry in which the copper ore deposits are hosted. Promising areas for seeking porphyry copper ore deposits is predicated to be the west or southwest of Dexing. | GUO Shuo ZHAO Yuany QU Huanchun WU Dexin XU Hong LI Chao LIU Yan ZHU Xiaoyun WANG Zengke | 2012 | Acta Geologica Sinica(English Edition)2012，86，3： | 28 |
| 2 | Anoxic degradation of nitrogenous heterocyclic compounds by activated sludge and their active sites显示文摘The potential for degradation of five nitrogenous heterocyclic compounds(NHCs), i.e.,imidazole, pyridine, indole, quinoline, and carbazole, was investigated under anoxic conditions with acclimated activated sludge. Results showed that NHCs with initial concentration of 50 mg/L could be completely degraded within 60 hr. The degradation of five NHCs was dependent upon the chemical structures with the following sequence:imidazole > pyridine > indole > quinoline > carbazole in terms of their degradation rates.Quantitative structure–biodegradability relationship studies of the five NHCs showed that the anoxic degradation rates were correlated well with highest occupied molecular orbital.Additionally, the active sites of NHCs identified by calculation were confirmed by analysis of intermediates using gas chromatography and mass spectrometry. | Peng Xu Hongjun Han Haifeng Zhuang Baolin Hou Shengyong Jia Dexin Wang Kun Li Qian Zhao | 2015 | Journal of Environmental Sciences2015，27，5： | 5 |
| 3 | Serological Investigation of Laboratory-Confirmed and Suspected Ebola Virus Disease Patients During the Late Phase of the Ebola Outbreak in Sierra Leone显示文摘This study aimed to investigate the serological characteristics of Ebola virus(EBOV) infection during the late phase of the Ebola outbreak in Sierra Leone. In total, 877 blood samples from 694 suspected Ebola virus disease(EVD) cases assessed from March to December 2015, were analyzed via real-time reverse transcription polymerase chain reaction(RT-PCR) for viral RNA and enzyme-linked immunosorbent assay(ELISA) and Luminex to detect antibodies against EBOV. Viral load and EBOV-specific IgM/IgG titers displayed a declining trend during March to December 2015. Viral RNA load decreased rapidly at earlier stages after disease onset, while EBOV-specific IgM and IgG still persisted in 58.1%(18/31) and 93.5%(29/31) of the confirmed EVD patients and in 3.8%(25/663) and 17.8%(118/663) of the RNA-negative suspected patients in the later phase, respectively. Dynamic analysis of longitudinally collected samples from eight EVD patients revealed typically reversed trends of declining viral load and increasing IgM and/or IgG titers in response to the EBOV infection.The present results indicate that certain populations of Sierra Leone developed immunity to an EBOV infection in the late phase of the outbreak, providing novel insights into the risk assessment of EBOV infections among human populations. | Yang Liu YuLan Sun Wei Wu AQian Li XianDa Yang Shuo Zhang Chuan Li QiuDong Su ShaoJian Cai DaPeng Sun HaiYang Hu Zhe Zhang XiuXu Yang Idrissa Kamara Sheku Koroma Gerald Bangura Alie Tia Abdul Kamara Matt Lebby Brima Kargbo Jiandong Li Shiwen Wang XiaoPing Dong YueLong Shu WenBo Xu George F. Gao GuiZhen Wu DeXin Li William J. Liu MiFang Liang | 2018 | Virologica Sinica2018，33，4： | 2 |
| 4 | Random seismic noise attenuation by learning-type overcomplete dictionary based on K-singular value decomposition algorithm显示文摘The transformation of basic functions is one of the most commonly used techniques for seismic denoising,which employs sparse representation of seismic data in the transform domain. The choice of transform base functions has an influence on denoising results. We propose a learning-type overcomplete dictionary based on the K-singular value decomposition( K-SVD) algorithm. To construct the dictionary and use it for random seismic noise attenuation,we replace fixed transform base functions with an overcomplete redundancy function library. Owing to the adaptability to data characteristics,the learning-type dictionary describes essential data characteristics much better than conventional denoising methods. The sparsest representation of signals is obtained by the learning and training of seismic data. By comparing the same seismic data obtained using the learning-type overcomplete dictionary based on K-SVD and the data obtained using other denoising methods,we find that the learning-type overcomplete dictionary based on the K-SVD algorithm represents the seismic data more sparsely,effectively suppressing the random noise and improving the signal-to-noise ratio. | XU Dexin HAN Liguo LIU Dongyu WEI Yajie | 2016 | Global Geology2016，19，1： | 2 |
| 5 | The MMU Implementation of Unity-1 Microprocessor显示文摘Virtual memory management is always a very essential issue of the modern microprocessor design. A memory management unit (MMU) is designed to implement a virtual machine for user programs, and provides a management mechanism between the operating system and user programs. This paper analyzes the tradeoffs considered in the MMU design of Unity 11 CPU of Peking University, and introduces in detail the solution of pure hardware table walking with two level page table organization. The implementation takes care of required operations and high performances needed by modern operating systems and low costs needed by embedded systems. This solution has been silicon proven, and successfully porting the Linux 2.4.17 kernel, the XWindow system, GNOME and most application software onto the Unity platform. | 宋传华 Cheng Xu Zhu Dexin | 2003 | High Technology Letters2003，9，4： | 2 |
| 6 | A method to determine the periodic solution of the nonlinear dynamics system 显示文摘 | Li Dexin Xu Jianxue | 2004 | Journal of Soundand Vibration2004，275，12： | 1 |
| 7 | Studyon filler metal(Ni-Fe-C)during GTAW of WC-30Co to45″carbon steel显示文摘 | XU Peiquan ZHAO Xiujun YANG Dexin | 2005 | Journal of Materials Science2005，40，12： | 1 |
| 8 | Comparison of finite difference and pseudo-spectral methods in forward modelling based on metal ore model of random media显示文摘With more applications of seismic exploration in metal ore exploration,forward modelling of seismic wave has become more important in metal ore. Finite difference method and pseudo-spectral method are two important methods of wave-field simulation. Results of previous studies show that both methods have distinct advantages and disadvantages: Finite difference method has high precision but its dispersion is serious; pseudospectral method considers both computational efficiency and precision but has less precision than finite-difference. The authors consider the complex structural characteristics of the metal ore,furthermore add random media in order to simulate the complex effects produced by metal ore for wave field. First,the study introduced the theories of random media and two forward modelling methods. Second,it compared the simulation results of two methods on fault model. Then the authors established a complex metal ore model,added random media and compared computational efficiency and precision. As a result,it is found that finite difference method is better than pseudo-spectral method in precision and boundary treatment,but the computational efficiency of pseudospectral method is slightly higher than the finite difference method. | LIU Dongyu HAN Liguo ZHANG Pan XU Dexin | 2016 | Global Geology2016，19，2： | 1 |
| 9 | Urodynamic study in the neurogenic bladder dysfunction caused by in- tervertebral disk hernia 显示文摘 | Dong Dexin Xu Zhishun Shi Benkang | 2006 | Neurourol Urodyn2006，25，5： | 1 |
| 10 | A Method to Determine the Periodic Solution of the Non-linear Dynamics Sys- tem显示文摘 | Li Dexin Xu Jianxue | 2004 | Journal of Sound and Vibration2004，275，12： | 1 |
| 11 | An Adaptive Virtual Area Partition Clustering Routing Protocol Using Ant Colony Optimization for Wireless Sensor Network显示文摘 | Ma Dexin Ma Jian Xu Pengmin | 2014 | Advances in Wireless Sensor Networks2014，418，： | 1 |
| 12 | Juxtaglomerular cell tumor of the kidney—a new classification scheme显示文摘 | Dexin Dong Hanzhong Li Weigang Yan Weifeng Xu | 2010 | Urologic Oncology: Seminars and Original Investigations2010，，： | 1 |
| 13 | The diagnosis and surgical management of juxtaglomerular cell tumor of the kidney显示文摘 | Dexin Dong Hanzhong Li Weigang Yan Weifeng Xu Lin Lu Zhengpei Zeng | 2010 | Journal of Hypertension2010，，3： | 1 |
| 14 | Status and prospects of Chinese wind energy显示文摘 | Xu Jianzhong He Dexin Zhao Xiaolu | 2010 | Energy2010，35，11： | 1 |
| 15 | CFD simulation of hydrodynamics of valve tray显示文摘 | Li Xingang Liu Dexin Xu Shimin | 2009 | Chem Eng Pro2009，48，1： | 1 |
| 16 | A Pilot-scale Study on Coal Gasification Wastewater Reclamation Using Pretreatment Alternatives Combined with Ultrafiltration and Reverse Osmosis显示文摘Aims to investigate the performance of the pilot-scale reclamation plant for coal gasification wastewater( CGW) using ultrafiltration and reverse osmosis with appropriate pretreatment alternatives,different pre-treatment alternatives- coagulation,adsorption,and ozonation methods were employed to treat the secondary effluent of coal gasification wastewater( SECGW) in a pilot-scale pressurized membrane system. The performance was compared to choose the most suitable pre-treatment alternative for the SECGW reclamation.Ozone reaction achieved highest COD removal efficiency( 79.6%- 91.0%),resulting in the stable normalized parameters of the subsequent ultrafiltration and reverse osmoses. In contrast,the coagulation and adsorption processes achieved only 32. 8%- 45. 7% and 53. 1%- 64. 6% decreases in COD,respectively. The residual organic pollutants in the reverse osmosis feed water led to an increase in normalized pressure drop and a decrease in normalized permeability( or membrane transference coefficient). The hydrophobic fraction was the main constituent( approx. 70% of DOC) in pretreated SECGW, and the hydrophobic-neutral fraction contributed mostly to the UV absorbance( 53%). Fluorescence excitation emission matrices revealed that ozonation removed most of the hydrophobic and aromatic proteins such as tyrosine and tryptophan which dominated in raw wastewater. The recalcitrant compounds such as phenolic compounds, heterocyclic compounds,especially long-chain hydrocarbons,which were easily attached to the membrane surface and contributed to organic fouling,could be oxidized and mineralized by ozone. Among the three pretreatments,ozonation showed highest removal efficiencies of hydrophobic and aromatic proteins,therefore resulting in highest normalized permeability. | Qian Zhao Hongjun Han Fang Fang Peng Xu Kun Li Dexin Wang | 2015 | Journal of Harbin Institute of Technology(New Series)2015，22，6： | 1 |
| 17 | Status and prospects of Chinese wind energy显示文摘 | XU JIANZHONG HE DEXIN ZHAO XIAOLU | | 0，，11： | 1 |
| 18 | Uhrawide- band dispersion control of a metamaterial surface for per- fectly-matched-layer-likeabsorption 显示文摘 | Ye Dexin Wang Zhiyu Xu Kuiwen | 2013 | Physical Review Letters2013，111，18： | 1 |
| 19 | A new method to determine the periodic orbit of a nonlinear dynamic system and its period显示文摘 | Li Dexin Xu Jianxue | | 0，，： | 1 |
| 20 | Screening of High Virulent Isolate of Beauveria spp. against Helicoverpa assulta and Changes in Protective Enzymes Activities of Infected Larvae显示文摘Eleven isolates of Beauveria spp., including B. bassiana(Bb062) newly isolated from Helicoverpa assulta, and other seven B. bassiana isolates and three B. brongniartii isolates that were originally isolated from different geographic origins and various hosts, were tested against the 3^(rd) instar larvae of H. assulta. The protective enzyme activity in the 3^(rd) larvae of H. assulta infected by highly virulent isolate was also assayed. The results showed that the isolate Bb062 had the highest virulence to the 3^(rd) instar larvae among eleven isolates of Beauveria spp., with a corrected mortality reaching 91.07% within 10 d post treatment, and the LT_(50) was 4.67 d. After inoculated with three concentrations(1.0 ×10~6, 1.0 ×10~7 and 1.0×10~8 conidia/mL) of Bb062 conidial suspension, the accumulative mortality of H. assulta larvae increased with the increase of concentration and observation time, and the LC_(50) was 1.82×10~7 conidia/mL. Activities of superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT) in H. assulta larvae first increased rapidly then dropped sharply within 72 h. Bb062 showed high virulence to H. assulta and could inhibit activities of protective enzymes. Therefore, it will be a promising biocontrol agent against H. assulta. | Zhang Guochao Liu Mingke Zhou Jianyun Chen Dexin Yan Fangfang Xu Chuangtao Jiang Lianqiang Li Maoye | 2019 | Plant Diseases and Pests2019，10，2： | 0 |
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