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Asymptotic Behavior of Solutions to a Class of Systems of Delay Differential Equations

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1375-1384页

作者： Tai shan YI Li hong HUANG College of Mathematics and Econometrics. Hu'nan University Changsha Hu'nan 410082 P. R. China

The authors investigate the asymptotic behavior of solutions to a class of systems of delay differential equations. It is shown that every bounded solution of such a class of systems tends to a constant vector as t→... 详细信息

关键词： asymptotic behavior delay differential equation ω-limit set

A Novel Biomass Supported Na_2CO_3 System for Flue Gas Desulfurization

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Chinese Chemical Letters 2002年第9期13卷 903-906页

作者： hong shan shanG Yuan KOU Fan YANG College of Chemistry&Molecular Engineering Peking UniversityBeijing 100871.

The breakthrough and stoichiometric SO2 adsorption efficiencies of a biomass supported Na2CO3 system (80 wt %Na2CO3/straw) have reached 48.9 % and 80.6 % respectively at a desulfurization temperature of 80C.

关键词： Straw adsorption efficiency SO2.

Instability of Waves in Magnetized Vortex-Like Ion Distribution Dusty Plasmas

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Communications in Theoretical Physics 2007年第1期47卷 149-154页

作者： DUAN Wen-shan CHEN Jian-hong hong Xue-Ren WAN Gui-Xin Department of Physics Northwest Normal University Lanzhou 730070 China

A modified Zakharov-Kuznetsov equation for small but finite dustic waces in a magnetized votex-like ion distribution dusty plasma is obtained in this *** seems that there are instability for a soliton under higher-order transverse perturbations in this system. There is a certain critical value 4λ0. If the ratio of the wave length of the higher-order perturbations to the width of the soliton is larger than this critical value, the solitary wave is unstable, otherwise it is stable.

关键词： equationdust size distribution soliton modified Zakharov-Kuznetsov

Effects of transjugular intrahepatic portosystemic shunt using the Viatorr stent on hepatic reserve function in patients with cirrhosis

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World Journal of Clinical Cases 2021年第7期9卷 1532-1542页

作者： Xin Yao Hao Zhou shan Huang shan-hong Tang Jian-Ping Qin Department of Gastroenterology General Hospital of Western Theater CommandChengdu 610083Sichuan ProvinceChina Department of Gastroenterology Fengjie County People's HospitalChongqing 404600China Department of Digestive Medicine General Hospital of Western Theater CommandChengdu 610083Sichuan ProvinceChina Department of Digestion General Hospital of Western Theater CommandChengdu 610083Sichuan ProvinceChina

BACKGROUND As transjugular intrahepatic portosystemic shunt(TIPS)creation alters the hemodynamic status of the portal system,whether reduced portal blood supply affects the synthetic reserve function of the liver has been the focus of clinical *** the Viatorr stent entered the Chinese market in 2015,it has not yet been widely used in clinical ***,unlike other countries,the main cause of liver cirrhosis in China is viral ***,use of the Viatorr stent to establish a TIPS channel in patients with liver cirrhosis with differing etiologies is of great clinical *** To investigate factors affecting changes in liver reserve function after TIPS Viatorr stent *** Clinical data from 200 patients with cirrhotic portal hypertension who received TIPS treatment from March 2016 to March 2020 were analyzed *** patients were divided into three groups(A-C),according to their disease etiology,with post-hepatitis,autoimmune,and alcoholic cirrhosis,*** and postoperative liver and renal function and coagulation data,Child-Pugh grade,and model for end-stage liver disease(MELD)scores were *** analyses were performed using the t-test or chi-square *** incidence and of hepatic encephalopathy and patient survival were calculated using Kaplan-Meier *** The surgical success rate was 100%,with mean portal pressure gradient(mmHg)decreasing from 25.5±5.22 to 10.04±2.76(t=45.80;P<0.001).After 24 mo,the cumulative incidence of hepatic encephalopathy in group A was significantly lower than that in group B/C,while the cumulative survival rate was significantly higher in group A than in group B/C(P<0.05 for both).The Child-Pugh score for group A was 6.96±1.21,which was significantly better than those of groups B(7.42±0.99;t=-2.44;P=0.016)and C(7.52±1.12;t=-2.67;P=0.009).Further,the MELD score for group A(9.62±2.19)was significantly better than those for groups B(10.64

关键词： Portal shunt,transjugular intrahepatic Hypertension Viatorr stent Liver reserve function

Clinical efficacy of antiviral therapy in patients with hepatitis Brelated cirrhosis after transjugular intrahepatic portosystemic shunt

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World Journal of Gastroenterology 2021年第30期27卷 5088-5099页

作者： Xin Yao shan Huang Hao Zhou shan-hong Tang Jian-Ping Qin Department of Gastroenterology General Hospital of Western Theater CommandChengdu 610083Sichuan ProvinceChina Department of Gastroenterology Fengjie County People's HospitalChongqing 404600China

BACKGROUND As a country with a high burden of hepatitis B,China has about 86 million cases of hepatitis B virus infection,ranking the first in the ***,there are about 390000 deaths due to hepatitis B-related complications such as liver cirrhosis and liver cancer every ***,how to control portal hypertension,improve liver functional reserve,and reduce the incidence of hepatic failure and liver cancer in such patients is the focus of current clinical *** clinical study in our center suggested that at 24 mo after transjugular intrahepatic portosystemic shunt(TIPS),the liver functional reserve of patients with hepatitis B cirrhosis was better than that of patients with alcoholinduced and immune cirrhosis,which may be related to the effective etiological *** To investigate the clinical efficacy of three first-line antiviral drugs recommended by the guidelines of prevention and treatment for chronic hepatitis B in China(2019)in the treatment of patients with hepatitis B-related cirrhosis who had received a *** The clinical data of 137 patients with hepatitis B-related cirrhosis with portal hypertension after receiving TIPS at our centre between March 2016 and December 2020 were analysed *** to different anti-viral drugs,the patients were divided into entecavir(ETV)(n=70),tenofovir alafenamide fumarate(TAF)(n=32),and tenofovir disoproxil fumarate(TDF)(n=35)*** cumulative incidence of hepatic encephalopathy and hepatocellular carcinoma,survival,and changes in hepatic reserve function and glomerular filtration rate in patients treated with different antiviral drugs within 24 mo after surgery were *** At 24 mo after surgery,the Child-Pugh score in the TAF group(6.97±0.86)was lower than that in the TDF(7.49±0.82;t=-2.52,P=0.014)and ETV groups(7.64±1.17;t=-2.92,P=0.004).The model for end-stage liver disease score in the TAF group at 24 mo after surgery was 9.72±1.5,which was

关键词： Transjugular intrahepatic portosystemic shunt Hypertension Antiviral Hepatitis B-related cirrhosis Liver reserve function

Regulation of Cued Fear Expression via Corticotropin-ReleasingFactor Neurons in the Ventral Anteromedial Thalamic Nucleus

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Neuroscience Bulletin 2021年第2期37卷 217-228页

作者： Yin Lv Peng Chen Qing-hong shan Xin-Ya Qin Xiu-hong Qi Jiang-Ning Zhou Hefei National Laboratory for Physical Sciences at the Microscale School of Life SciencesChinese Academy of Sciences Key Laboratory of Brain Function and DiseasesUniversity of Science and Technology of ChinaHefei 230027China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China

The ventral part of the anteromedial thalamic nucleus(AMv)is in a position to convey information to the cortico-hippocampal-amygdalar circuit involved in the processing of fear ***-releasing-factor(CRF)neurons are closely associated with the regulation of stress and ***,few studies have focused on the role of thalamic CRF neurons in fear *** the present study,using a conditioned fear paradigm in CRF transgenic mice,we found that the c-Fos protein in the AMv CRF neurons was significantly increased after cued fear *** activation of AMv CRF neurons enhanced cued fear expression,whereas inhibition had the opposite effect on the cued fear ***,chemogenetic manipulation of AMv CRF neurons did not affect fear acquisition or contextual fear *** addition,anterograde tracing of projections revealed that AMv CRF neurons project to wide areas of the cerebral cortex and the limbic *** results uncover a critical role of AMv CRF neurons in the regulation of conditioned fear memory.

关键词： Corticotropin-releasing-factor neurons Ventral anteromedial thalamic nucleus Cued fear expression Chemogenetics

Geometry, Electronic Structure, and Related Properties of Dye Sensitizer： 3,4-bis[1- （carboxymethyl）-3-indolyl]- 1 H-pyrrole-2,5-dione

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Chinese Journal of Chemical Physics 2009年第1期22卷 63-68页

作者： Cai-rong Zhang You-zhi Wu Yu-hong Chen Yu-tian Ding Ding-jun Zhang hong-shan Chen Department of Applied Physics Lanzhou University of Technology Lanzhou 730050 China School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 China College of Physics and Electronic Engineering Northwest Normal University Lanzhou 730070 China

The geometry, electronic structure, polarizability and hyperpolarizability of dye sensitizer 3,4-bis[1-（carboxymethyl）-3-indolyl]-1H-pyrrole-2,5-dione （BIMCOOH） were studied using density functional theory （DFT） with hybrid functional B3LYP, and the electronic absorption spectra were investigated using semi-empirical quantum chemical method ZINDO-1 and time-dependent DFT （TDDFT）. The results of natural bond orbital suggest that the natural charges of the dione, indole, and acetic groups are about 0.15e, -0.29e, and 0.44e, respectively. The calculated isotropic polarizability, polarizability anisotropy invariant and hyperpolarizability are 305.4, 188.3, and 1155.4 a.u., respectively. The electronic absorption spectral features in visible and near-UV region were assigned to the π→π^＊ transition due to the qualitative agreement between the experiment and the TDDFT calculations, and the transitions of the excited states 9-11 related to photoinduced intramolecular charge transfer processes. The analysis of electronic structure and UV-Vis absorption indicates that the indole groups primarily contributed sensitization of photo-to-currency conversion processes, and the interracial electron transfer between semiconductor TiO2 electrode and dye sensitizer BIMCOOH are electron injection processes from excited states of the dyes to the semiconductor conduction band.

关键词： Dye sensitizer Electronic structure Density functional theory Absorption spectrum

Combustion and energy balance of aluminum holding furnace with bottom porous brick purging system

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Journal of Central South University 2012年第1期19卷 200-205页

作者： ZHANG Jia-qi ZHOU Nai-jun ZHOU shan-hong School of Energy Science and Engineering Central South UniversityChangsha 410083China College of Aerospace and Material Engineering National University of Defense TechnologyChangsha 410073China Shenyang Aluminum and Magnesium Engineering and Research Institute Shenyang 110001China

For acquiring the details in aluminum holding furnace with bottom porous brick purging system,efforts were performed to try to find out the potential optimal operation *** adopting transient analysis scheme and constant boundary temperature,combustion in the furnace was investigated numerically using computational fluid dynamics(CFD).The predicted gas temperature shows good agreement with the measured results,and the predicted energy distribution of the furnace is consistent with that obtained from energy balance experiment,which confirms the reliability of the numerical *** results show that as the fuel-air mixture temperature rises up from 300 K to 500 K,the energy utilization of the furnace could increase from 34.55% to 37.14%.However,as the excess air coefficient increases from 1.0 to 1.4,energy utilization drops from 34.55% to 29.56%.Increasing the combustion temperature is the most effective way to improve the energy efficiency of the *** reactant temperature and medium excess air coefficient are recommended for high operation performance,and keeping the furnace jamb sealed well for avoiding leakage has to be emphasized.

关键词： aluminum holding furnace combustion flow numerical study computational fluid dynamics

Effects of Sub-zero Celsius Treatment and Tempering on the Stability of Retained Austenite in Bearing Steel

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Acta Metallurgica Sinica(English Letters) 2015年第6期28卷 787-792页

作者： Xiao-Hui Lu Wei Li Cheng-Lin Wang hong-shan Zhao Xue-Jun Jin State Key Lab of Metal Matrix Composite School of Materials Science and Engineering Shanghai Jiao Tong University Institute of Advanced Steels and Materials School of Materials Science and Engineering Shanghai Jiao Tong University

In this work, the influence of sub-zero Celsius treatment and tempering on the mechanical and thermal stability of retained austenite in beating steel were assessed by tensile test and DSC. Compared with traditional quenched and tempered treatment, sub-zero Celsius treatment obviously decreases the volume fraction of retained austenite. Moreover, the mechanical stability of retained austenite was enhanced due to the accumulation of compressive stresses in retained austenite after sub-zero Celsius treatment and tempering. Meanwhile, the morphology of retained austenite changed from film-like to blocky with austenitization temperature increasing, and the mechanical stability of film-like retained austenite is higher than that of blocky one. The DSC results showed that the activation energy of retained austenite decomposition slightly increased through sub-zero Celsius treatment and tempering. This result may probably be ascribed to partitioning of carbon during tempering. However, the temperature at which retained austenite starts to decompose is unchanged.

关键词： Bearing steel Sub-zero Celsius treatment Retained austenite Stability