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On the photoevaporation,dust polarization and kinematics of two nebulae in Sh2-236

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Research in Astronomy and Astrophysics 2021年第4期21卷 157-167页

作者： Archana Soam SOFIA Science center Universities Space Research AssociationNASA Ames Research CenterM.S.N232-12Moffett FieldCA 94035USA

In the work presented here,the impact of magnetic field on the dynamical evolution of cometary globules sim 129 and sim 130 in the Sh2-236 HⅡregion and the ionized gas streaming out of their surfaces is *** magnetic field morphology in the region associated with these globules is inferred using optical polarization measurements with the Sampurnanand Telescope at *** nebular emission is probed through radio continuum mapping at 1.4 GHz with the archival National Radio Astronomy Observatory(NRAO)Very Large Array(VLA)Sky Survey(NVSS)*** correlation of these measurements suggests that photoevaporated gas from the surfaces of sim 129 and sim 130 accumulates in clouds and starts streaming along the magnetic field *** ^(12)CO(J=1-0)molecular line observations are performed towards NGC 1893 from the 14-m single dish radio telescope in Taeduk Radio Astronomy Observatory(TRAO).The velocity dispersion in the ^(12)CO(J=1-0)molecular line and the dispersion in polarization angles are considered in the Davis-Chandrasekhar-Fermi formulation to estimate the magnetic field strength towards two sim *** average value of field strength is found to be~60μG with uncertainty of 0.5 times the estimated value.

关键词： ISM:general polarization:nebulae

simWall:a practical user-friendly stereo tiled display wall system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第4期8卷 596-604页

作者： XIE Li-jun ZHENG Yao YANG Ting-jun GAO Wen-xuan PAN Ning-he School of Computer Science and center for Engineering and Scientific Computation Zhejiang University Hangzhou 310027 China

simWall is a user-friendly, stereo tiled display wall system composed of 18 commodity projectors operated by a Linux graphics cluster. Collaborating together, these projectors work as a single logical display capable of giving a high-resolution show, large-scale, and passive stereo scene. In order to avoid tedious system setup and maintenance, software-based automatic geometry and photometric calibration are used. The software calibration is integrated to the system seamlessly by an on-card transform method and is transparent to users. To end-users, simWall works just as a common PC, but provides super computing, rendering and displaying ability. In addition, simWall has stereoscopic function that gives users a semi-immersive experience in polarized passive way. This paper presents system architecture, implementation, and other technical issues such as hardware constraints, projectors alignment, geometry and photometric calibration, implementation of passive stereo, and development of overall soft- ware environment.

关键词： Tiled display wall Stereoscopic display Multi-projectors display Parallel rendering Camera-based geometry and photometric calibration

simulating Eastern-and Central-Pacific Type ENSO Using a simple Coupled Model

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Advances in Atmospheric Sciences 2018年第6期35卷 671-681页

作者： Xianghui FANG Fei ZHENG Institute of Atmospheric Sciences Fudan University International center for Climate and Environment Science (ICCES) Institute of Atmospheric PhysicsChinese Academy of Sciences Collaborative Innovation center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology

Severe biases exist in state-of-the-art general circulation models（GCMs） in capturing realistic central-Pacific（CP） El Nino structures. At the same time, many observational analyses have emphasized that thermocline（TH） feedback and zonal advective（ZA） feedback play dominant roles in the development of eastern-Pacific（EP） and CP El Nino-Southern Oscillation（ENSO）, respectively. In this work, a simple linear air-sea coupled model, which can accurately depict the strength distribution of the TH and ZA feedbacks in the equatorial Pacific, is used to investigate these two types of El Nino. The results indicate that the model can reproduce the main characteristics of CP ENSO if the TH feedback is switched off and the ZA feedback is retained as the only positive feedback, confirming the dominant role played by ZA feedback in the development of CP ENSO. Further experiments indicate that, through a simple nonlinear control approach, many ENSO characteristics,including the existence of both CP and EP El Nino and the asymmetries between El Nino and La Nina, can be successfully captured using the simple linear air-sea coupled model. These analyses indicate that an accurate depiction of the climatological sea surface temperature distribution and the related ZA feedback, which are the subject of severe biases in GCMs, is very important in simulating a realistic CP El Nino.

关键词： central-Pacific El Nino eastern-Pacific El Nino simple coupled model simulation asymmetry

Intensified East Asian summer monsoon and associated precipitation mode shift under the 1.5 ℃ global warming target

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Advances in Climate Change Research 2018年第2期9卷 102-111页

作者： WANG Tao MIAO Jia-Peng SUN Jian-Qi FU Yuan-Hai Nansen-Zhu International Research center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Collaborative Innovation center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Nanjing 210044 China University of Chinese Academy of Sciences Beijing 100049 China Climate Change Research center Chinese Academy of Sciences Beijing 100029 China

In this study, the East Asian summer climate changes under the 1.5 ℃ global warming （1.5 GW） target in 30 simulations derived from 15 coupled models within the Coupled Model Intercomparison Program phase 5 （CMIP5） are examined. Compared with the current summer climate （1975-2005）, both surface air temperature and precipitation increase significantly over the East Asian continent during the 1.5 GW period （average period 2021-2051）. In northeastern China this is particularly pronounced with regional averaged precipitation increases of more than 7.2%, which is greater than that for the whole East Asian continent （approximately 4.2%）. Due to stronger enhancement of precipitation north of 40°N, the leading empirical orthogonal function （EOF） mode of summer precipitation over the East Asian continent changes from tripolar-like mode to dipole mode. As there is stronger surface warming over the East Asian continent than that over surrounding ocean, the land-sea thermal contrast is enhanced during the 1.5 GW period. As a result, the monsoon circulation in the lower troposphere is significantly strengthened, which causes the increased summer precipitation over the East Asian continent. In addition, larger interannual variabilities of East Asian summer monsoon circulation and associated precipitation are also suggested for the 1.5 GW period.

关键词： East Asian summer monsoon Precipitation 1.5 ℃ global warming target CMIP5

Reliable and Load Balance-Aware Multi-Controller Deployment in SDN

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China Communications 2018年第11期15卷 184-198页

作者： Tao Hu Peng Yi Jianhui Zhang Julong Lan National Digital Switching System Engineering & Technological R&D center Zhengzhou 450002 China

Software Defined Networking(SDN) provides flexible network management by decoupling control plane and data plane. However, such separation introduces the issues regarding the reliability of the control plane and controller load imbalance in the distributed SDN network, which will cause the low network stability and the poor controller performance. This paper proposes Reliable and Load balance-aware Multi-controller Deployment(RLMD) strategy to address the above problems. Firstly, we establish a multiple-controller network model and define the relevant parameters for RLMD. Then, we design the corresponding algorithms to implement this strategy. By weighing node efficiency and path quality, Controller Placement Selection(CPS) algorithm is introduced to explore the reliable deployments of the controllers. On this basis, we design Multiple Domain Partition(MDP) algorithm to allocate switches for controllers according to node attractability and controller load balancing rate, which could realize the reasonable domain planning. Finally, the simulations show that, compared with the typical strategies, RLMD has the better performance in improving the reliability of the control plane and balancing the distribution of the controller loads.

关键词： software defined networking controller reliability load balancing networkoptimization

Cohort studies of long-term exposure to outdoor particulate matter and risks of cancer: A systematic review and meta-analysis

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The Innovation 2021年第3期2卷 28-42页

作者： Pei Yu Suying Guo Rongbin Xu Tingting Ye Shanshan Li Malcolm R.sim Michael J.A.bramson Yuming Guo School of Public Health and Preventive Medicine Monash UniversityMelbourneVIC 3004Australia National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector Biology(National Institute of Parasitic DiseasesChinese Center for Disease Control and Prevention)Shanghai 200025China

Robust evidence is needed for the hazardous effects of outdoor particulate matter(PM)on mortality and morbidity from all types of *** summarize and meta-analyze the association between PM and cancer,published articles reporting associations between outdoor PM exposure and any type of cancer with individual outcome assessment that provided a risk estimate in cohort studies were identified via systematic *** 3,256 records,47 studies covering 13 cancer sites(30 for lung cancer,12 for breast cancer,11 for other cancers)were included in the quantitative *** pooled relative risks(RRs)for lung cancer incidence or mortality associated with every 10-mg/m^(3) PM2.5 or PM10 were 1.16(95%confidence interval[CI],1.10–1.23;I2=81%)or 1.22(95%CI,1.02–1.45;I2=96%),*** but non-significant risks were found for breast *** cancers were shown to be associated with PM exposure in some studies but not consistently and thus warrant further investigation.

关键词： mortality lung exposure

A comparative study of interface reconstruction algorithms in molten metal flow

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China Foundry 2013年第1期10卷 50-56页

作者： Young-sim Choi Jun-Ho Hong Ho-Young Hwang e-Design center Korea Institute of Industrial TechnologyIncheon 406-840Korea

In the present research,two numerical schemes for improving the accuracy of the solution in the flow simulation of molten metal were *** method is the Piecewise Linear Interface Calculation(PLIC) method and the other is the Donor-Acceptor(D-A) *** verify the module of the interface reconstruction algorithms,simple problems were *** these validations,the accuracy and efficiency of these two methods were compared by simulating various real *** the numerical simulation of free surface flow,it is possible for the PLIC method to track very accurately the interface between *** PLIC method,however,has the weak point in that a lot of computational time is required,though it shows the more accurate interface *** Donor-Acceptor method has enough effectiveness in the macro-observation of a mold filling sequence though it shows inferior ***,for the problems that need the accurate solution,PLIC is more appropriate than *** accuracy may cause less efficiency in numerical *** method between D-A method and PLIC method should be chosen depends on the product.

关键词： interface reconstruction DA PLIC molten metal flow accuracy volume of fluid method

Sperm hyaluronidase is critical to mammals'fertilization for its ability to disperse cumulus-oocyte complex layer

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Asian Journal of Andrology 2022年第4期24卷 411-415页

作者： Dong-Won Seol Sang Hoon Joo Young-Hyun Kim Bong-Seok Song Bo-Woong sim Sun-Uk Kim Soojin Park Gabbine Wee Ekyune Kim Laboratory Animal center Daegu-Gyeongbuk Medical Innovation Foundation(DGMIF)Daegu 41061Korea College of Pharmacy Catholic University of DaeguGyeongbuk 38430Korea National Primate Research center(NPCR) Korea Research Institute of Bioscience and BiotechnologyChungcheongbuk-do 28116Korea Futuristic Animal Resource and Research center Korea Research Institute of Bioscience and BiotechnologyChungcheongbuk-do 28116Korea Department of Biochemistry and Molecular Biology Melvin and Bren Simon Comprehensive Cancer CenterIndiana University School of MedicineIndianapolisIN 46202USA

Glycosylphosphatidylinositol-anchored sperm hyaluronidases have long been believed to assist in sperm penetration through the cumulus-oocyte complex(COC);however,their role in mammalian fertilization remains ***,we have shown that hyaluronidase 5(Hyal5)/Hyal7 double-knockout(dKO)mice produce significantly fewer offspring than their wild-type(WT)counterparts because of defective COC *** infertility is mainly caused by a low sperm *** can be further exacerbated by the deficiency of sperm hyaluronidase,which disperses the cumulus cells of the outer layer of the *** the current study,we evaluated the effects of a low count of Hyal-deficient sperm and conditions of ovulated oocytes on the fertilization rate using a mouse *** results demonstrated that a low sperm count further decreases the in vitro fertilization(IVF)rate of Hyal-deficient dKO *** addition,the dKO spermatozoa resulted in a fertilization rate of 12.5%upon fertilizing COCs with a thick cumulus layer,whereas the IVF rate was comparable to that of WT spermatozoa when oocytes with a thin or no cumulus layer were ***,we proved that the IVF rate of dKO spermatozoa could be recovered by adding rat spermatozoa as a source of sperm *** results suggest that a deficiency of proteins involved in fertilization,such as sperm hyal,has a vital role in fertilization.

关键词： HYAL5 HYAL7 cumulus-oocyte complex fertilization infertility sperm hyaluronidase

Longitudinal Magnetoresistance Effect at Low Temperature in Silver Telluride Thin Films

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Chinese Physics Letters 1999年第10期16卷 756-757页

作者： LIANG Bing-qing WANG Yin-jun State Key Laboratory for Magnetism Institute of Physics and Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080

Large longitudinal magnetoresistance(LMR)was observed in nonmagnetic silver telluride *** magnitude of the LMR is not simply dependent on T and H,for example,multi-peaks of p at low held and low temperature appear in the Ag-Te *** both of-△ρ/ρand a transition from-△ρ/ρto+△ρ/ρexist in Ag-Te sims,the magnetoresistance(MR)behavior of the Ag-Te sim does not like the bulk Ag-Te,but likes the doped ***-27%of LMR was observed at low Seld in the Ag-Te sims,while it could be negligible in the doped *** MR behavior in Ag-Te sims is discussed by means of a formation of impurity bands in the films.

关键词： resistance Silver silver