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Computational Studies of Lobed Forced Mixer Flows

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Journal of Thermal Science 1998年第1期7卷 22-28页

作者： H.Hu S.C.M.Yu 等 JetPropulsionLaboratory BeijingUniversityofAeronauticsBeijingChina ThermalandFluidsEngingeeringDivis

Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the timedependent compressible Navier-Stokes equa tions and discretized in the finite-difference form. A simple two-layer eddy viscosity model has also been used to account for the turbulence. Computed results are compared with some of the velocity measurements using a laserDoppler anemometer (Yu and Yip (1997)). In general, good agreement can be obtained in the streamwise mean velocity distribution but the decay of the streamwise circulation is underpredicted. Some suggestions to the discrepancy are proposed.

关键词： lobed forced mixer flows eddy viscosity model velocity distribution

Flow Patterns and Thermal Drag in Supersonic Duct Flow with Heating

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Journal of Thermal Science 1994年第2期3卷 93-98页

作者： Zeng－YuanGuo Zhi－HongLiu DepartmentofEngineeringMechanics TsinghuaUnversityBeijingChina DepartmentofEngineeringMechanics Tsin

The supersonic duct flow with fixed back pressure to stagnation pressure ratio Pb/Po under heating is investigated analytically. A 'Flow Pattern Diagram' which consists of six pattern zones is *** this diagram the actual flow state in supersonic duct flow system can be determined conveniently when Pb/Po and heating intensity are known. It is impossible for flow with heavy heating to become supersonic, even though the pressure ratio is much smaller than the critical pressure ratio. Based on the analogy between viscous effect and heating effect a thermal drag factor has been defined, which can predict the flow property variation due to heating and the relative importance of viscous effect and heating effect.

关键词： supersonic flow heating effect.

Status, Prospect and Policy of Food Development in China

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Biomedical and Environmental Sciences 1996年第2期9卷 149-163页

作者： JIANGJIAN－PING WANGYAN－MING StateFoodandNutritionConsultationCommitteeofChina（SFNCC） 30BaishiqiaoRoad100081BeijingChina StateFo

Agricultural Production has entered into a new period since Chinese government implemented the Reform and Opening to the outside world. Food output rose rapidly,and food consumption and nutrition status of the Chinese people have improved remarkably. The Chinese government has formulated a series of development policies and timely programs to ensure food safety

关键词：中国食品生产现状发展前景食品开发政策

A Hybrid Approach for Selection in Service Community

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China Communications 2014年第A01期11卷 114-120页

作者： TANG Chaogang SchoolofComputerScienceandTechnology ChinaUniversityofMiningandTechnologyXuZhou221116China InformationSecurityCenter BeijingUniversityofPostsandTelecommunicationsBeijingChina NationalEngineeringLaboratoryforDisasterBackupandRecovery BeijingChina

Although there have been existing competitions among web service （WS） providers, they still have opportunities to cooperate together for common profits. WS community as a mean to provide an ontological organization of WSs that share the same domain of interest has realized this kind of fancy in the sense that providers can work together to compete against others outside the community. Service selection in WS community is different from the traditional service selection, since WS community should take into account its own benefits. Therefore, we propose a hybrid approach to make service selection in WS community. The approach considers the profits of both WS community and the services within it. The experimental evaluation shows that the approach has a great advantage over other approach without consideration of community＇s benefits.

关键词： Community service selection profits dominating top-k

Expression of Fas and Fas ligand in liver tissue infected with hepatitis B virus

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中华内科杂志 1998年第Z1期 46;F03-46;F03页

作者：郎振为王海舰孟忻李俊强张士杰 DepartmentofPathology YouanHospitalBeijingChina

Objective To study the paraffin-embedded liver tissue from 60 biopsied or autopsied cases, including 20 cases of acute mild hepatitis, chronic active hepatitis, and active cirrhosis. Methods Immunohistochemical double labelling technique was used by using polyclonal anti-Fas and anti-Fas ligand. The detection rates for Fas and Fas ligand were 76.7％ (46/60) and 70.0％ (42/60), respectively. Fas antigen was located in the cytoplasm of hepatocytes. Fas ligand was expressed mainly in infiltrating lymphocytes in portal or periportal areas (34/42, 80.9％), and also in some cytoplasm of hepatocytes (25/42, 59.5％). Results The distribution of Fas ligand-positive hepatocytes was similar to that of Fas-positive hepatocytes in liver *** positive cells were scattered in the intralobular in acute mild hepatitis, but they were more commonly aggregated in periportal areas, especially near the edges of the piecemeal necrosis region or in infiltrating mononucleocytes in chronic active hepatitis and active cirrhosis. Double labelling studies showed that both Fas and Fas ligand might be expressed in the same or different hepatocytes of the same area. Conclusion Fas-Fas ligand system may play an important role in liver cell injury due to hepatitis B virus infection.

关键词： Hepatitis B Fas Fas ligand

Sialin介导的唾液硝酸盐分泌提供紧急胃保护

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中华口腔医学杂志 2009年第Z1期44卷 86-86页

作者： Wang Song-ling Qin Li-zheng Xibao Liu Xia Deng-sheng SUN Qi-fei Shi Rui-tang Ding Gang Qi Sen-rong He Jun-qi Deng Da-jun Indu S. Ambudkar MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina MedicalUniversitySchoolofStomatology beijingchina

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Human group B rotavirus: adult diarrhea rotavirus

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CHINESE MEDICAL JOURNAL 1996年第1期109卷 12-12页

作者： Hong Tao InstituteofVirology ChineseAcademyofPreventiveMedicine beijingchina

Rotaviruses are the most important etilogic agent of severe diarrhea illness of human beings. Historically, rotaviruses were identified by their electron microscopic morphology and their genetic content of 11 double-s...

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Application of Integrated Seismic Data Processing and Interpretation to Subtle Reservoir Survey

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Applied Geophysics 2004年第2期1卷 95-102页

作者： ZhouJinming SinoGeophysicalCo.Ltd. 1515EpochCentreNo.31ZizhuyuanRoadHaidianDistrictBeijingChina100089

Nowadays, it becomes very urgent to find remain oil under the oil shortage ***, most of simple reservoirs have been discovered and those undiscovered are mostly complex structural, stratigraphic and lithologic ones. Summarized in this paper is the integrated seismic processing/interpretation technique established on the basis of pre-stack AVO processing and *** feedbacks occurred between the pre-stack and post-stack processes so as to improve the accuracy in utilization of data and avoid pitfalls in seismic attributes. Through the integration of seismic data with geologic data, parameters that were most essential to describing hydrocarbon characteristics were determined and comprehensively appraised, and regularities of reservoir generation and distribution were described so as to accurately appraise reservoirs, delineate favorite traps and pinpoint wells.

关键词： ubtle reservoir data processing interpretation attribute trap neural network

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牙源性囊性角化瘤中的PTCH-1基因突变

中华口腔医学杂志 2009年第Z1期44卷 103-103页

作者： SUN Li-sha Li Tie-jun DepartmentofOralPathology PekingUniversitySchoolandHospitalofStomatologyBeijingChina

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