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Anticipative Stochastic Differential Equations with Non-smooth Diffusion Coefficient

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1473-1480页

作者： zong Xia liang Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China

In this paper we prove the existence and uniqueness of the solutions to the one-dimensional linear stochastic differential equation with Skorohod integral Xt（ω）=η（w）＋∫^t 0 asXs（ω）dWs＋∫^t 0 bsXs（ω）ds, t∈[0,1] where （Ws） is the canonical Wiener process defined on the standard Wiener space （W,H,u）, a is non-smooth and adapted, but η and b may be anticipating to the filtration generated by （Ws）. The intention of the paper is to eliminate the regularity of the diffusion coefficient a in the Malliavin sense, in the existing literature. The idea is to approach the non-smooth diffusion coefficient a by smooth ones.

关键词： Non-smooth and anticipative stochastic differential equations Skorohod integral Malliavin derivative

Investigation of epididymal immunology

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Chinese Science Bulletin 2005年第18期50卷 1969-1974页

作者： CHANG zong-liang Institute for Biochemistry and Cell Biology Chinese Academy of Sciences Shanghai 200031 China

Immunology is the study of the structure and function of the immune system. The immune system consists of an earlier-stage innate immunity and a later-stage adap-tive immunity. The task of the immune system is to efficiently respond to non-self antigens and the invasion of pathogens, thereby protecting the host’s homeostasis. This review article discusses the structure and function of the epididymis, in-cluding the composition of the epithelial cells of the epidi-dymis and their relationship to the immune system, through the assessment of alterations in the immune cells of the epididymis. The review also shows the anti-inflammatory properties of rat epididymal defensin and the description of the blood-epididymis barrier, immune barrier, epididymitis and pathological mechanisms of infertility in males. Taken together, we see that the epididymis possesses a close link with immunology. Finally, this review discusses the future of studies involving epididymal immunology.

关键词：附睾免疫系统炎症男性不育症抗原细胞

Study of frame-rate up conversion based on H.264

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The Journal of China Universities of Posts and Telecommunications 2007年第1期14卷 106-110页

作者： GAN zong-liang ZHU Xiu-chang Province Key Laboratory on Image Processing and Image Communication Nanjing University of Posts and Telecommunications Nanjing 210003 China

In this study, a low complexity frame-rate up conversion method using compressed domain information for H.264 decoder is proposed. In the proposed scheme, the motion vectors （MVs） are estimated using constant acceleration motion model, and the MVs regarded as no credibility are corrected, and the interpolation method is applied on the basis of the macroblock （MB） coded types. Applied to the H.264 decoder, the proposed method provides high quality interpolation frames and an obvious decrease of the block artifacts.

关键词： video post processing H.264 motion compensated frame interpolation (MCFI) frame-rate up conversion (FRUC)

The effect of prophylactic antibiotics in acute upper gastrointestinal bleeding patients in the emergency department

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World Journal of Emergency Medicine 2023年第6期14卷 442-447页

作者： Miao Gan liang zong Xuezhong Yu Jun Xu Emergency Department State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100730China

BACKGROUND: Currently, prophylactic antibiotics are recommended only for cirrhotic patients with acute upper gastrointestinal bleeding(AUGIB);however, the benefit for other AUGIB patients remains undetermined. We aimed to compare the clinical outcomes between patients with AUGIB with and without prophylactic antibiotics to identify the population that requires this ***: Patients with AUGIB admitted between 1st January 2019 and 31st December 2021 in the Emergency Department of Peking Union Medical College Hospital were enrolled. Patients were divided into the antibiotic and non-antibiotic groups. The primary outcome was in-hospital mortality, and the secondary outcome was the onset of new infection. The risk factors for mortality and infection were analyzed, and stratification analysis of prophylactic antibiotics was performed. Continuous data were analyzed using the t-test or nonparametric rank sum test, and categorical data were analyzed using the Chi-square test or Fisher's exact test. Indicators with significant differences between the groups were included for logistic regression analysis. A P-value <0.05 was considered statistically significant. RESULTS: A total of 392 individuals were included, among them, 281 patients received prophylactic antibiotics, and 111 patients did not receive prophylactic antibiotics. The mortality rates were significantly lower in the antibiotic group than in the non-antibiotics group(6.41% vs. 17.12%, P=0.001). The risk factors for infection were varicose veins(P=0.045) and endotracheal intubation(P=0.005) in the prophylactic antibiotic group, and endoscopic treatment(P=0.010) in the non-prophylactic antibiotic group. Stratified analyses showed that patients with age ≥ 65 years, endotracheal intubation, endoscopic treatment, and AUGIB of variceal etiologies benefited from prophylactic ***: AUGIB patients may benefit from prophylactic antibiotics to decrease mortality, especially those aged ≥ 65 years a

关键词： Acute upper gastrointestinal bleeding Prophylactic antibiotics Stratification

Perspectives for Tibetan Plateau data assimilation

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National Science Review 2020年第3期7卷 495-499页

作者： zong-liang Yang Long Zhao Yujun He Bin Wang Department of Geological Sciences Jackson School of Geosciences (JSG) the University of Texas at Austin Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA) Institute of Atmospheric Physics Chinese Academy of Sciences School of Geographical Sciences Southwest University State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Department of Earth System Science Tsinghua University College of Ocean Sciences University of Chinese Academy of Sciences

Known as the Third Pole, the Tibetan Plateau (TP) exhibits profound impacts on weather and climate on regional and global scales. Due to complex terrains and harsh environments, conventional observations over the TP a... 详细信息

关键词： Filter Kalman SCF Perspectives for Tibetan Plateau data assimilation

Improving Land Surface Hydrological Simulations in China Using CLDAS Meteorological Forcing Data

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Journal of Meteorological Research 2019年第6期33卷 1194-1206页

作者： Jianguo LIU Chunxiang SHI Shuai SUN Jingjing liang zong-liang YANG School of Mathematics and Computational Science and Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan ProvinceHuaihua UniversityHuaihua 418008China National Meteorological Information Center China Meteorological AdministrationBeijing 100081China Key Laboratory of Regional Climate–Environment Research for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Geological Sciences The John A.and Katherine G.Jackson School of GeosciencesThe University of Texas at AustinAustinTX 78712USA

The accuracy of land surface hydrological simulations using an offline land surface model(LSM)depends largely on the quality of the atmospheric forcing *** this study,Global Land Data Assimilation System(GLDAS)forcing data and the newly developed China Meteorological Administration Land Data Assimilation System(CLDAS)forcing data are used to drive the Noah LSM with multiple parameterizations(Noah-MP)and to explore how the newly developed CLDAS forcing data improve land surface hydrological simulations over China's *** monthly soil moisture(SM)and evapotranspiration(ET)simulations are then compared and evaluated against *** results show that the Noah-MP driven by the CLDAS forcing data(referred to as CLDASNoah-MP)significantly improves the simulations in most cases over China's Mainland and its eight river *** increases the correlation coefficient(R)values from 0.451 to 0.534 for the SM simulations at a depth range of 0–10 cm in China's Mainland,especially in the eastern monsoon area such as the Huang–Huai–Hai Plain,the southern Yangtze River basin,and the Zhujiang River ***,the root-mean-square error is reduced from 0.078 to0.068 m3 m-3 for the SM simulations,and from 12.9 to 11.4 mm month-1 for the ET simulations over China's Mainland,especially in the southern Yangtze River basin and Zhujiang River *** study demonstrates that,by merging more in situ and remote sensing observations in regional atmospheric forcing data,offline LSM simulations can better simulate regional-scale land surface hydrological processes.

关键词： hydrological simulations Noah-MP atmospheric forcing China Meteorological Administration Land Data Assimilation System(CLDAS) Global Land Data Assimilation System(GLDAS)

Efficacy evaluation of imatinib treatment in patients with gastrointestinal stromal tumors:A meta-analysis

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World Journal of Gastroenterology 2010年第33期16卷 4227-4232页

作者： Ping Chen liang zong Wei Zhao Lei Shi Department of Gastrointestinal Surgery Subei People’s Hospital of Jiangsu ProvinceYangzhou 225001Jiangsu ProvinceChina

AIM:To perform a meta-analysis to derive a more precise estimation of imatinib treatment for different genotypes of gastrointestinal stromal tumors(GIST).METHODS:Studies were identified by searching PubMed and *** criteria were patients with exon 9-mutant,exon 11-mutant or wide type(WT) GIST,receiving chemotherapy of imatinib for clinical trial,and efficacy evaluation was cumulative response (CR)including complete response and partial *** odds ratios(OR)for CR in stem cell factor receptor (KIT)mutation patients vs WT genotype patients,KIT exon 11-mutant genotype patients vs KIT exon 9-mutant genotype patients and KIT exon 9-mutant genotype patients vs WT genotype patients were calculated with 95%confidence interval(CI)for each study as an estimation of the efficacy of ***:Five studies including 927 patients were involved in this *** overall OR(KIT group vs WT group)was 3.34(95%CI:2.30-4.86,P <0.00001,P heterogeneity=0.04).The overall OR in KIT exon 11 group vs KIT exon 9 group was 3.29(95%CI: 2.17-5.00,P<0.00001,P heterogeneity=0.33).The overall OR in KIT exon 9 group vs WT group was 1.23(95% CI:0.73-2.10,P=0.44,P heterogeneity=0.42).CONCLUSION:Most patients with different genotypes of GIST and KIT exon 11-mutant will benefit from the individualized treatment of imatinib.

关键词： Gastrointestinal stromal tumors Gene Ima- tinib Efficacy Meta-analysis

Laparoscopic surgery for trans-anal barotrauma: a case report

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World Journal of Emergency Medicine 2024年第5期15卷 425-427页

作者： Chengxi Liu liang zong Huadong Zhu Jun Xu Emergency Department Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Trans-anal barotrauma resulting from the use of air guns is rare in the emergency *** diagnosis and timely treatment can yield a good *** first published case of trans-anal barotrauma caused by a manually operated force pump was reported in 1904.[1]Colorectal injuries have the potential to progress to high-mortality complications,such as abdominal infection,peritonitis,and septic shock.[2,3]Herein,we report a case of trans-anal barotrauma in a man who presented with pneumoperitoneum,pneumomediastinum,and *** performed laparoscopic exploration and loop ileostomy on this patient.

关键词： trauma diagnosis Laparoscopic

Modeling the Impacts of Nitrogen Dynamics on Regional Terrestrial Carbon and Water Cycles over China with Noah-MP-CN

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Advances in Atmospheric Sciences 2020年第7期37卷 679-695页

作者： Jingjing liang zong-liang YANG Xitian CAI Peirong LIN Hui ZHENG Qingyun BIAN Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Jackson School of Geosciences University of Texas at AustinAustinTexas 78712USA Climate and Ecosystem Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

As an important part of biogeochemical cycling,the nitrogen cycle modulates terrestrial ecosystem carbon storage,water consumption,and environmental *** the complex interactions between nitrogen,carbon and water at a regional scale remains *** China as a testbed,this study presents the first application of the nitrogenaugmented community Noah land surface model with multi-parameterization options(Noah-MP-CN)at the regional ***-MP-CN parameterizes the constraints of nitrogen availability on photosynthesis based on the Fixation and Uptake of Nitrogen plant nitrogen model and the Soil and Water Assessment Tool soil nitrogen *** impacts of nitrogen dynamics on the terrestrial carbon and water cycles are investigated by comparing the simulations with those from the original *** results show that incorporating nitrogen dynamics improves the carbon cycle ***-CN outperforms Noah-MP in reproducing leaf area index(LAI)and gross primary productivity(GPP)for most of China,especially in the southern warm and humid regions,while the hydrological simulations only exhibit slight improvements in soil moisture and *** impacts of fertilizer application over cropland on carbon fixation,water consumption and nitrogen leaching are investigated through a trade-off *** to halved fertilizer use,the actual quantity of application increases GPP and water consumption by only 1.97%and 0.43%,respectively;however,the nitrogen leaching is increased by 5.35%.This indicates that the current level of fertilizer use is a potential concern for degrading the environment.

关键词： Noah terrestrial moisture