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A NUMERICAL MODEL OF FAR-FIELD COD CONCENTRATION DISTRIBUTION FOR NATURAL RIVER

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Journal of Hydrodynamics 2000年第1期12卷 96-107页

作者： Hou Guo xiang, Li Qi, Shi Zhong kun, Chen Cai kan Faculty of Traffic Sci. & Eng., huazhong university of science and technology, wuhan 430074, P.R.china Ye Ming, Deng Lian mu Yangtze Water Resources Protection institute, wuhan 430051, P.R.china huazhong Univ of science and Technology Wuhan China

A far field numerical model is developed to simulate jet pollution into natural rivers. Its character is to compute the velocity and pollution concentration separately. The velocity is computed by SIMPLEC algorithm in boundary fitted coordinate systems. The pollution concentration distribution is computed by developed QUAL IIm and QAIIL 2D program. The present model was applied to the Xiantao section of the Hanjiang River a tributary of Yangtze River, and Xiangjiang River. The flow field and COD distribution are in good agreement with field data.

关键词： pollution convection dispersion concentration field depth averaged COD

Magnetic and mineralogical characteristics of reservoir rocks in the Yakela oil field, northern Tarim Basin and their implications for magnetic detection of oil and gas accumulations

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Chinese science Bulletin 1999年第2期44卷 174-177页

作者： LIU Qingsheng LIU ShugerDepartment of Applied geophysics, china university of Geosciences, wuhan 430074, china The State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation of china, Chengdu institute of technologyChengdu 610059, china Department of Applied geophysics China University of Geosciences Wuhan China The State Key Laboratory of Oil/Gas Reservoir Geology and Erploitation of china Chengdu Institute of Technology Chengdu China

The evidence about hydrocarbon migration within reservoir rocks in two wells has been obtained according to results of magnetic and mineralogical analysis of the Kapushaliang Group reservoir rocks from wells S15 and S4 located at the Yakela oil field, Tarim Basin. Results show that the secondary alteration associated with oil and gas accumulations above oil and gas field is predominantly magnetite mineralization, and that sulfur alteration occurs commonly at oil-water boundary and their products are generally pyrite and pyrrhotite, except for magnetite alteration which is closely related with hydrodynamical conditions in situ. The spherical magnetite grains of cauliflower microtexture on surface extracted from oil-bearing cores are secondary magnetite related with hydrocarbon microseepage and their diameters are usually less than 50 μm.

关键词： hydrocarbon microseepage magnetic mineralogy magnetic hysteresis loop thermal magnetic analysis reservoir petrophysics.

Energy Efficient Beacon Discovering Scheme for Node Localization in Wireless Sensor Networks

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wuhan university Journal of Natural sciences 2010年第4期15卷 303-307页

作者： LIU Xinxin1,2, ZHAO Erdun3, CHEN Kun2 1. School of Computer, wuhan university, wuhan 430072, Hubei, china 2. wuhan Digital Engineering Research institute, wuhan 430074, Hubei, china 3. Department of Computer science, huazhong Normal university, wuhan 430079, Hubei, china School of Computer Wuhan University Wuhan Hubei China wuhan Digital Engineering Research institute Wuhan Hubei China Department of Computer science Huazhong Normal University Wuhan Hubei China

Efficient sensor node localization is a crucial part of many location-dependent applications that utilize wireless sensor networks (WSNs). To cope with the problem of insufficient bea-con node for localization,we design a beacon discovery protocol in this paper that helps the blind node to find beacons nearby and present an energy efficient scheme for the beacon that receives the request from a blind node to adjust its radio range. We obtain the relationship between the mean energy consumption with adjust-ment number by the mathematical analysis. Numerical results show that great energy saving is achieved when the optimal ad-justment number is adopted.

关键词： localization wireless sensor networks energy- efficient radio range adjustment

Source mechanism of strong aftershocks (M_s≥5.6) of the 2008/05/12 Wenchuan earthquake and the implication for seismotectonics

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science china Earth sciences 2009年第6期52卷 739-753页

Dozens of >M5, hundreds of >M4, and much more >M3 aftershocks occurred after the 2008/05/12 Wenchuan earthquake, which were well recorded by permanent and portable seismic stations. After relocated with P arrival, the >M3 aftershocks show two trends of distribution, with most of the aftershocks located along the north-east strike consistent with Longmenshan fault system, yet there is a north-west trend around the epicenter. It seems that substantially more aftershocks occur in regions with crystalline bedrocks. Then we collected waveform data from National Digital Seismograph Network and regional seismograph network of china, and employed 'Cut and Paste' method to obtain focal mechanisms and depths of the big aftershocks (M≥5.6). While most of those aftershocks show thrust mechanism, there are some strike slip earthquakes in the northern-most end of the rupture. Focal mechanisms show that the events located on the southern part of central Beichuan-Yingxiu Fault (BY) are mainly thrust earthquakes, which is consistent with initial mechanism of the main shock rupture. In the north part the aftershocks along the BY are also dominated by thrust slip, which is quite different from the right slip rupture of the main shock. Around Qingchuan-Pingwu Fault, the focal mechanisms are dominated by right-slip rupture with large depths (~18 km). So we suspected that in the north part the main shock might rupture on two faults: Beichuan Fault and Qingchuan-Pingwu Fault. The complex pattern of aftershock mechanisms argues for presence of a complicated fault system in the Longmenshan area.

关键词： focal mechanism seismotectonics Wenchuan earthquake cut and paste.

A Review of the Policies on the Private Colleges of china

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Geo-Spatial Information science 2002年第3期5卷 65-70页

作者： SONG Qiurong SONG Qiurong,Ph.D candidate,the institute of Higher Education,huazhong university of science and technology,wuhan 430072,china. he institute of Higher Education Huazhong University of Science and Technology Wuhan China

One of the most important factors impacting the development of today’s private higher education in china is that there are not enough policies to support ***,the history of private higher education in Nanjing Nationa... 详细信息

关键词： Nanjing nationalist Government private higher education educational policy

Spectral anomalies and spectral switches of partially coherent and polychromatic light diffracted at an aperture

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science china(Physics,Mechanics & Astronomy) 2004年第1期47卷 24-35页

作者： Lü Baida1, 3 & PAN Liuzhan1, 2 1. institute of Laser Physics and Chemistry, Sichuan university, Chengdu 610064, china 2. Department of Physics, Luoyang Normal College, Luoyang 471022, china 3. State Key Laboratory of Laser technology, huazhong university of science and technology, wuhan 430074, china Correspondence should be addressed to L Baida (email: badalu@***) Received July 10, 2003 institute of Laser Physics and Chemistry Sichuan University Chengdu China State Key Laboratory of Laser technology Huazhong University of Science and Technology Wuhan China Department of Physics Luoyang Normal College Luoyang China

Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracted at an aperture are studied. It is shown that, as compared with spatially fully coherent and polychromatic light whose spectral anomalies are induced only by aperture diffraction, the spectral anomalies and spectral switches of partially coherent and polychromatic light depend on the aperture diffraction, spatial correlationβ and bandwidth of the original spectrum. Detailed numerical calculations are made to illustrate the behavior of spectral switches of partially coherent and polychromatic light, and the results for spatially fully coherent and polychromatic light are treated as a special case ofβ=1 and included in our theory.

关键词： spectral anomaly spectral switch partially coherent and polychromatic light far field aperture diffraction

In-situ TEM Study on Microstructural Evolution of Nanostructured TiO_2

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Journal of wuhan university of technology(Materials science) 2007年第2期22卷 209-213页

作者：邵艳群唐电 State Key Laboratory of Die&Mould technology Huazhong University of Science and Technology institute for Materials Research Fuzhou University

The effect of electron beam on the microstructures and phase transformation of nanostructured TiO2 heat treated at various temperatures for different time was studied by in-situ TEM and SAED. Anatase ex-situ heated at 250℃ and 360℃ transformed to rutile while irradiated by the electron beam. With the increasing sizes and distribution of the powders on the amorphous carbon, the process of phase transformation by the electron beam was encumbered. These evolutions may be due to the changes of vacuum atmosphere and the properties of powders.

关键词： electron beam sol-gel technique TiO2 phase transformation microstructure

Inhibiting Apoptosis of CTLL-2 Cells to Enhance Their GVL Effects via Anti-Fas Ribozyme

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Acta Biochimica et Biophysica Sinica 2004年第8期36卷 559-565页

作者： Min ZHANG, Fang LIU, Lin-Bo LIU, Yong YOU, Zhi-Chao CHEN, and Ping ZOUinstitute of Hematology, Union Hospital, Tongji Medical College, huazhong university of science & technology, wuhan 430022, china institute of Hematology Union Hospital Tongji Medical College Huazhong University of Science & TechnologyWuhan 430022 China

To investigate the inhibition role of anti-Fas hammerhead ribozyme on fas expression and Fas-mediated apoptosis of CTL cell line CTLL-2 cells, the cDNA of an anti-Fas hammerhead ribozyme was synthesized, its expression plasmid was constructed and transfected into CTLL-2 cells by electroporation. fas expression of CTLL-2 cells was detected by RT-PCR and Western blot. CTLL-2 cell viability was measured using MTT assay when co-cultured with mouse T cell leukemia cell line EL4 cells that highly expressed Fas ligand (FasL). Meanwhile, caspase-3 proteolytic activity was detected, and cell apoptosis was measured by flow cytometry and Hochest-PI double staining. Killing activity of CTLL-2 cells was detected by lactate dehydrogenase (LDH) releasing assay in vitro. Results showed that the expression of both Fas mRNA and protein in CTLL-2 cells were decreased after transfection of anti-Fas ribozyme. Compared with mock- transfected group and mutant ribozyme-transfected group, viability of CTLL-2 cells co-cultured with EL4 cells was increased significantly and cells killing activity was enhanced after transfected with anti-Fas ribozyme, while the caspase-3 activity and apoptosis rate was significantly decreased. The results demonstrated anti-Fas ribozyme could efficiently cleave Fas and inhibit Fas-mediated apoptosis of CTLL-2 cells to improve their viability. Our study made a basis for enhancing CTLL-2 cells anti-leukemia effect in DLI.

关键词： Hammerhead ribozyme anti-Fas CTLL-2 cells apoptosis tumor immunity

γ-hydroxybutyrate protects the liver from warm ischemia-reperfusion injury in rat

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Hepatobiliary & Pancreatic Diseases International 2004年第2期3卷 245-249页

作者： Zheng- Zhuan Wei and Sui-Sheng Xia wuhan, china institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, huazhong university of science and technology, wuhan 430030, china institute of Organ Transplantation Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China. weizhz@***

BACKGROUND: Ischemia-reperfusion (I/R) syndrome remains an important clinical consideration in hepatic sur- gery, hemorrhagic shock, and liver transplantation, -y-hy- droxybutyrate (GHB) has been reported to exert protective effects against ischemia-reperfusion injury to various or- gans. To investigate whether GHB protects the liver from warm ischemia-reperfusion injury, we performed this study in rats. METHODS: Thirty male Wistar rats were randomly divided into a sham-operation group, a control group, and three I/R groups pretreated with GHB, GHB plus naloxone or naloxone. After 30 minutes of partial ischemia, followed by 60 minutes of reperfusion in the liver, histomorphological and enzymological changes, lipid peroxidation, apoptosis, and the plasma level of endothelin-1 were observed. RESULTS: I/R increased the serum levels of alanine ami- notransferase, aspartate aminotransferase and lactate dehy- drogenase and the plasma level of endothelin-1 significantly (P<0.01), in addition to increase of apoptotic index (AI) from 0.28%±0.25% to 17.68%±1.91%. The levels of he- patic malondialdehyde were markedly increased, whereas the activities of superoxide dismutase were markedly de- creased. GHB pretreatment prevented the liver from warm ischemia-reperfusion injury significantly, but naloxone par- tially blocked this effect. CONCLUSION: GHB may significantly protect the liver from hepatic warm ischemia-reperfusion injury via several different mechanisms.

关键词： γ-hydroxybutyrate liver ischemia-reperfusion injury apoptosis