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Chinese Physics B 2024年第2期33卷 164-168页

作者：刘欣田梦雨崔晓宁张馨鹤 School of Physics and Technology University of JinanJinan 250022China Marketing Service Center(Center of Metrology) State Grid ShanDong Electric Power CompanyJinan 250001China

In a two-frequency cavity driving and atom driving atom-cavity system,we find the photon blockade *** a truncated eigenstates space,we calculate the zero-delay second-order correlation function of the cavity mode analytically and obtain an optimal condition for the photon *** including three transition pathways,we find that higher excitations of the cavity mode can be further suppressed and the zero-delay second-order correlation function can be reduced *** on the master equation,we simulate the system evolution and find that the analytical solutions match well with the numerical *** scheme is robust with small fluctuations of parameters and may be used as a new type of single photon source.

关键词： photon blockade single photon source quantum interference

Success of susceptibility-guided eradication of helicobacter pylori in a region with high secondary clarithromycin and levofloxacin resistance rates

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World Journal of Gastroenterology 2024年第2期30卷 184-195页

作者： Yan-Meng Wang Mo-Ye Chen Jing Chen xin-he zhang Yan Feng Yu-Xi Han Yi-Ling Li Department of Gastroenterology The First Affiliated Hospital of China Medical UniversityShenyang 110000Liaoning ProvinceChina Key Laboratory of Cancer Etiology and Prevention in Liaoning Education Department The First Hospital of China Medical UniversityShenyang 110000Liaoning ProvinceChina

BACKGROUND Resistance to clarithromycin(CLA)and levofloxacin(LFX)of helicobacter pylori(***)is increasing in severity,and successful eradication is ***,the eradication success rate has greatly declined,leaving a large number of patients with previous treatment *** To investigate secondary resistance rates,explore risk factors for antibiotic resistance,and assess the efficacy of susceptibility-guided *** We recruited 154 subjects positive for Urea Breath Test who attended The First Affiliated Hospital of China Medical University between July 2022 and April *** underwent a string test after an overnight *** gastric juice was obtained and transferred to vials containing storage ***,DNA extraction and the specific DNA amplification were performed using quantitative polymerase chain reaction(qPCR).Demographic information was also analyzed as part of the *** on these results,the participants were administered susceptibility-guided *** was compared with that of the empiric treatment *** A total of 132 individuals tested positive for the *** ureA gene by qPCR *** resistance rate reached a high level of 82.6%(n=109),LFX resistance rate was 69.7%(n=92)and dual resistance was 62.1%(n=82).Gastric symptoms[odds ratio(OR)=2.782;95%confidence interval(95%CI):1.076-7.194;P=0.035]and rural residence(OR=5.152;95%CI:1.407-18.861;P=0.013)were independent risk factors for secondary resistance to CLA and LFX,respectively.A total of 102 and 100 individuals received susceptibility-guided therapies and empiric treatment,*** antibiotic susceptibility-guided treatment and empiric treatment groups achieved successful eradication rates of 75.5%(77/102)and 59.0%(59/411)by the intention-to-treat(ITT)analysis and 90.6%(77/85)and 70.2%(59/84)by the per-protocol(PP)analysis,*** eradication rates of these two treatment strategies were significantly

关键词： helicobacter pylori Antibiotic resistance Clarithromycin Levofloxacin String-test Susceptibility-guided therapy Eradication rate

On Improved Delay-dependent Robust Stability Criteria for Uncertain Systems with Interval Time-varying Delay

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International Journal of Automation and computing 2015年第1期12卷 102-108页

作者： Jun-Jun Hui he-xin zhang Xiang-Yu Kong xin Zhou The Xi'an Research Institute of High Technology The Baoji Research Institute of High Technology

This paper considers the problem of delay-dependent robust stability for uncertain systems with interval time-varying delays. By using the direct Lyapunov method, a new Lyapunov-Krasovskii(L-K) functional is introduced based on decomposition approach, when dealing with the time derivative of L-K functional, a new tight integral inequality is adopted for bounding the cross terms. Then, a new less conservative delay-dependent stability criterion is formulated in terms of linear matrix inequalities(LMIs),which can be easily solved by optimization algorithms. Numerical examples are given to show the effectiveness and the benefits of the proposed method.

关键词： Lyapunov-Krasovskii(L-K) functional delay decomposition approach linear matrix inequality(LMI) interval timevarying delay robust stability

Delay-dependent Non-fragile H_∞ Control for Linear Systems with Interval Time-varying Delay

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International Journal of Automation and computing 2015年第1期12卷 109-116页

作者： Jun-Jun Hui he-xin zhang Xiang-Yu Kong The Xi'an Research Institute of High Technology

This paper considers the problem of delay-dependent non-fragile H∞control for a class of linear systems with interval time-varying delay. Based on the direct Lyapunov method, an appropriate Lyapunov-Krasovskii functional(LKF) with triple-integral terms and augment terms is introduced. Then, by using the integral inequalities and convex combination technique, an improved H∞performance analysis criterion and non-fragile H∞controller are formulated in terms of linear matrix inequalities(LMIs), which can be easily solved by using standard numerical packages. At last, two numerical examples are provided to demonstrate the effectiveness of the obtained results.

关键词： Lyapunov-Krasovskii functional(LKF) non-fragile H∞control linear matrix inequality(LMI) interval time-varying delay

Microstructure Characteristics and Corrugation Interface Behavior of Al/Mg/Al Composite Plate Rolled Under Large Strain

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Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 827-838页

作者： Peng-Da Huo Feng Li Wen-Tao Niu Rong-he Gao&An-xin zhang School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin150040China Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education Harbin Institute of TechnologyHarbin150001China Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin150001China

Traditional rolled(TR)aluminum(Al)/magnesium(Mg)/aluminum(Al)composite plates have many bottlenecks such as multiple passes,low interlaminar strength,and weak mechanical *** this paper,the hard-plate rolling(HPR)method was used to prepare Al/Mg/Al composite plates under a single pass reduction of 60%.The results show that the ultimate tensile strength(UTS)of the composite plate obtained by hard-plate rolling is 262.3 MPa,and the percentage of total elongation at fracture(At)is 12.3%,which is 31.6%and 37.4%higher than that of the traditional rolling,*** is attributed to the unique corrugated interlocking structure of the interface of the composite plate caused by hard-plate *** shear texture produced by the Mg plate weakens the strong-basal *** the same time,the strong basal slip and the large amount of energy stored in the deformed grains provide favorable conditions for dynamic recrystallized(DRX)*** microstructure is deeply refined by DRX,and the strength and plasticity of the composite plate are improved *** provides scientific guidance for the development of high-performance lightweight composite plates and the research on hard-plate rolling technology and also has good industrial production and application potential.

关键词： Hard-plate rolling Al/Mg/Al composite plate Corrugated interface Strength-plasticity Strengthening mechanism

Hot Deformation and Corrosion Resistance of High-Strength Low-Alloy Steel

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Acta Metallurgica Sinica(English Letters) 2019年第4期32卷 495-505页

作者： Wilasinee Kingkam Cheng-Zhi Zhao Hong Li he-xin zhang Zhi-Ming Li College of Materials Science and Chemical Engineering Harbin Engineering University Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationHarbin Engineering University College of Power and Energy Engineering Harbin Engineering University

The hot deformation characteristics and the corrosion behavior of a high-strength low-alloy(HSLA) steel were investigated at deformation temperatures ranging from 800 to 1100 ℃ and strain rates ranging from 0.1 to 10 s-1 using an MMS-200 thermal simulation testing machine. Based on the flow curves from the experiment, the effects of temperature and strain rate on the dynamic recrystallization behavior were analyzed. The flow stress decreased with increasing deformation temperature and decreasing strain rate. With the assistance of the process parameters, constitutive equations were used to obtain the activation energy and hot working equation. The hot deformation activation energy of HSLA steel in this work was 351.87 kJ/mol. The work hardening rate was used to determine the critical stress(strain) or the peak stress(strain). The dependence of these characteristic values on the Zener-Hollomon parameter was found. A dynamic recrystallization kinetics model of the tested HSLA steel was constructed, and the validity of the model was confirmed by the experimental results. Observation of the microstructures indicated that the grain size increased with increasing deformation temperature,which led to a lowered corrosion resistance of the specimens.

关键词： Dynamic recrystallization Potentiodynamic polarization Hot deformation Flow stress High-strength low-alloy steel

Novel mechanism of hepatobiliary system damage and immunoglobulin G4 elevation caused by Clonorchis sinensis infection

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World Journal of Clinical Cases 2021年第23期9卷 6639-6653页

作者： xin-he zhang Die Huang Yi-Ling Li Bing Chang Department of Gastroenterology The First Affiliated Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina

Clonorchis sinensis infection is still a major public health *** is estimated that more than 15 million people worldwide are infected,especially in Northeast China,Taiwan,South Korea,and North *** detection of Clonorchis sinensis eggs in feces and bile is still the only gold standard for the diagnosis of Clonorchis sinensis infection,and new detection methods are needed to improve the detection *** Clonorchis sinensis invades the human body,it mainly parasitizes the hepatobiliary ***,it is closely related to hepatobiliary diseases such as cholangitis,bile duct stones,liver fibrosis,and *** increase in immunoglobulin G4(IgG4)caused by Clonorchis sinensis infection is rare and there are few reports about the relevant *** may be related to the inflammatory factors interleukin(IL)-4,IL-10,and IL-13 produced by human phagocytes,T cells,B cells,and other immune cells in the process of resisting the invasion of Clonorchis ***,this finding still needs further clarification and *** article reviews the epidemiology,clinical manifestations,serology,imaging,pathogenic mechanism,and control measures of Clonorchis sinensis infection to help establish the diagnostic process for Clonorchis *** report novel mechanisms of IgG4 elevation due to Clonorchis sinensis infection to provide more experience and a theoretical basis for clinical diagnosis and treatment of this infection.

关键词： Liver damage Bile duct damage hepatobiliary system destruction Clonorchis sinensis infection Immunoglobulin G4 Clinical manifestations

An Efficient Organic Additive to Control the Crystallization Rate of Aliphatic Polyketone: A Non-isothermal Crystallization Kinetics Study

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Chinese Journal of Polymer Science 2017年第4期35卷 547-557页

作者： he-xin zhang Min-Jeong Park Young-Kwon Moon Eun-Bin Ko Xue-quan zhang Keun-Byoung Yoon Department of Polymer Science and Engineering Kyungpook National University Key Laboratory of Synthetic Rubber Changchun Institute of Applied ChemistryChinese Academy of Sciences

Three types of organic compounds--two carboxylic acids and an anhydride, were used as additives for polyketone （PK）. The effect of the additive structure and their feed ratios on the melting temperature, crystallization temperature, and crystallization rate of PK were studied. We found that the crystallization temperature could be reduced significantly by introducing a small quantity of organic additive, in particular, an anhydride. On addition of 1 phr of anhydride, the crystallization temperature was reduced by 10.7 ℃. Therefore, the non-isothermal crystallization kinetics of aliphatic PKJanhydride blends with various feed ratios was investigated using DSC. The results were analyzed by various theoretical models, such as Avrami, Ozawa and combined Avrami-Ozawa models.

关键词： Polyketone Anhydride Non-isothermal Crystallization kinetics

Isothermal-crystallization Kinetics and Spherulite Growth of Aliphatic Polyketone/Polyamide-6 Blends

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Chinese Journal of Polymer Science 2017年第6期35卷 782-792页

作者： he-xin zhang Seong-Rok Huh Eun-Bin Ko Byung-Sik Park Keun-Byoung Yoon Department of Polymer Science and Engineering Kyungpook National UniversityKorea Key Laboratory of Synthetic Rubber Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Pharmaceutical Engineering International University of KoreaJinjuKorea

In this research, the morphologies, isothermal-crystallization kinetics, and spherulite growth of aliphatic polyketone/polyamide-6 blends were studied. A single glass-transition temperature （Tg） was determined, and the composition dependence of Tg for these blends was well described by the Kwei equation. The strong intermolecular interaction between the two polymer components was confirmed by melting-point depression. The isothermal-crystallization kinetics were analyzed on the basis of the Avrami approach. A linear increase in the radii of the spherulites with time was observed for all compositions. All the spherulites continued to grow at nearly identical growth rates. With increasing polyamide-6 content, the size of the spherulites in the polyketone/polyamide-6 blends gradually decreased, and the number of spherulites in the blends increased.

关键词： Polyketone Polyamide-6 Crystallization kinetics Spherulite growth

Living Polymerization of 1,3-Butadiene Catalyzed by Half-titanocene Complex Bearing Dibenzhydryl-substituted Aryloxide Ligand

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Chinese Journal of Polymer Science 2017年第6期35卷 721-727页

作者： Bo Dong Rui Zhuang Chun-yu zhang Wen-jie Zheng he-xin zhang Yan-ming Hu 孙广平张学全 College of Materials Science and Engineering Jilin University Key Laboratory of Synthetic Rubber Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Half-titanocene complexes bearing dibenzhydryl-substituted aryloxide ligands （2a-2d） were prepared. Among them, 2e adopted a three-legged distorted tetrahedral geometry evidenced by X-ray crystallography. The poly-1,3-butadiene with high molecular weight and narrow molecular weight distribution was obtained by using these complexes as the catalysts activated with methylaluminoxane （MAO）. The catalytic activities of the complexes depended on their structures. The Ti-- O--C bond in the complexes with large angle afforded them with higher activity, while Cp＊-based complexes exhibited lower activities than the Cp-based analogues. The activity of complex increased with increasing the polymerization temperature while the selectivity remained no change, indicating the high thermal stability. Furthermore, the polymerization of 1,3-butadiene catalyzed by 2a/MAO at 0 ℃ has been found in a living fashion.

关键词： Half-titanocene complexes 1,3-Butadiene Thermal stability Living polymerization