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Risk of Developing Non-Alcoholic Fatty Liver Disease Over Time in a Cohort of the Elderly in Qingdao,China

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Biomedical and Environmental Sciences 2023年第8期36卷 760-767页

作者： LIU Li shao Yu Han FENG En Qiang shao Zhu gang XING Dong Ming Cancer Institute The Affiliated Hospital of Qingdao UniversityQingdao UniversityQingdao 266071ShandongChina Qingdao Cancer Institute Qingdao 266071ShandongChina Qingdao Municipal Center for Disease Control and Prevention Qingdao 266033ShandongChina Qingdao Institute of Preventive Medicine Qingdao 266033ShandongChina Shandong Muhua Medical Technology Co. LtdQingdao 266109ShandongChina School of Life Sciences Tsinghua UniversityBeijing 100084China

Nonalcoholic fatty liver disease(NAFLD)is characterized by fat accumulation in the liver in the absence of alcohol consumption and comprises a variety of conditions such as simple steatosis,nonalcoholic steatohepatitis,fibrosis,and cirrhosis^([1]).More than one-quarter of the world’s population experience NAFLD^([2]).The prevalence of NAFLD in China increased from 23.8%in 2001 to 32.9%in 2018,indicating that hepatitis B virus is the primary cause of chronic liver disease^([3]).

关键词： NAFLD liver Liver

Angiogenesis in female reproductive system

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Chinese Science Bulletin 2001年第14期46卷 1145-1148页

作者： Longjiang shao cheng Zhu Chinese Acad Sci Inst Zool State Key Lab Reprod Biol Beijing 100080 Peoples R China

Neovascularization, i.e. new blood vessels formation, can be divided into two different processes: vasculogene-sis, whereby a primitive vascular network is established during embryogenesis from multipotential mesenchymal progenitors; and angiogenesis, which refers to the new blood vessels formation from pre-existing vessels[1,2].Angiogenesis contributes to the most process throughout the whole life span from embryonic development to adult growth’21. In this meaning, neovascularization is usually used to imply angiogenesis. Under physiological conditions, angiogenesis is a strictly regulated event and rarely happens in most adult tissues except for fracture or healing of wounds[2,3]. However, a notable phenomenon is that the tissues of ovary and uterine endometnum are unique in the cycle-specific changes in vascularity that occur in each estrous/menstrual cycle. Active angiogenesis occurs in placenta to satisfy the needs of embryonic implantation and development. Defects in angiogenesis are associated

关键词： Angiogenesis in female reproductive system

Serological prevalence and risk factor analysis of hepatitis G virus infection in Hubei Province of China

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World Journal of Gastroenterology 2000年第4期6卷 585-587页

作者： De Ying Tian Dao Feng Yang Ning shao Xia Zheng gang Zhang Hong Bo Lei Yuan cheng Huang Department of Infectious Diseases Tongji HospitalTongji Medical UniversityWuhan 430030Hubei ProvinceChina Unit of National Genetic Engineering Xiamen UniversityXiamen 361005Fujian ProvinceChina

Hepatitis G virus (HGV),also known as GB virus C, is a recently cloned virus which may be associated with human non A-E hepatitis[1，2] It is parenterally transmitted and usually coinfected or superinfected with hepatitis B or hepatitis C virus[3-5]. Some investigations have been reported on the seroprevalence and molecular prevalence of HGV infection in different areas and different population[6-15]. Current infection of HGV is diagnosed by detection of HGV RNA, and past infection with HGV is detectable by testing anti-HGV envelope protein (E2)[16-17]. To investigate the prevalence of HGV in Hubei Province, a central area of the People's Republic of China, ELISA and RT-PCR were employed to detect serum anti-HGV and HGV RNA in 1516 patients who were divided into 16 groups.

关键词： hepatitis G virus enzyme linked immunoabsorbent assay risk factors polymerase chain reaction prevalence transcription genetic

Regularization of mathematical model for chip flow angle catastrophe

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Advances in Manufacturing 2021年第4期9卷 568-579页

作者： shao-Nan Zhang Dong-Dong cheng Liang-Shan Xiong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

The chip flow angle(CFA)catastrophe in double-edged cutting results in a significant reduction in the cutting force,which can benefit the ***,established potential functions(i.e.,cutting power calculation functions)of mathematical models for the CFA catastrophe are presented in the form of transcendental functions with two control parameters and one state parameter,which are extremely complex.A method is proposed herein to realize the regularization of the potential functions and establish mathematical models in a standard form and with complete content for the CFA *** this method,the potential function of the CFA catastrophe is expanded into a k-order Taylor polynomial at each midpoint of N end-to-end equally partitioned intervals of the state parameter using the Taylor function provided in *** potential function after piecewise Taylor expansion is transformed into the same form as the potential function of the standard cusp catastrophe model by truncating the first five terms of the Taylor polynomial and eliminating the third-order term of the state parameter with elementary ***,the regularization of potential function is ***,the regularization of equilibrium surface and bifurcation set can be realized based on the conclusions of the catastrophe *** errors of the potential function,equilibrium surface,and bifurcation set are defined to evaluate the effectiveness of this regularization *** problem of calculating regularization errors is regarded as an optimization ***‘‘simulannealbnd’’function provided in MATLAB is used to solve the *** the proposed method,the regularization of a mathematical model for the CFA catastrophe established by the predecessor is completed;a mathematical model(i.e.,standard cusp catastrophe model)in a standard form and with complete content for the CFA catastrophe is established;and the corresponding regularization errors

关键词： Chip flow angle(CFA)catastrophe Mathematical model Regularization Potential function Catastrophe theory Cusp catastrophe model

Core and blanket thermal-hydraulic analysis of a molten salt fast reactor based on coupling of OpenMC and OpenFOAM

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Nuclear Science and Techniques 2020年第9期31卷 1-15页

作者： Bin Deng Yong Cui Jin-Gen Chen Long He shao-Peng Xia cheng-gang Yu Fan Zhu Xiang-Zhou Cai Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China CAS Innovative Academy in TMSR Energy System Chinese Academy of ScienceShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

In the core of a molten salt fast reactor(MSFR),heavy metal fuel and fission products can be dissolved in a molten fluoride salt to form a eutectic mixture that acts as both fuel and *** energy is released from the fuel salt and transferred to the second loop by fuel salt ***,the MSFR is characterized by strong interaction between the neutronics and the thermal ***,recirculation flow occurs,and nuclear heat is accumulated near the fertile blanket,which significantly affects both the flow and the temperature fields in the *** this work,to further optimize the conceptual geometric design of the MSFR,three geometries of the core and fertile blanket are proposed,and the thermal-hydraulic characteristics,including the three-dimensional flow and temperature fields of the fuel and fertile salts,are simulated and analyzed using a coupling scheme between the open source codes OpenMC and *** numerical results indicate that a flatter core temperature distribution can be obtained and the hot spot and flow stagnation zones that appear in the upper and lower parts of the core center near the reflector can be eliminated by curving both the top and bottom walls of the ***,eight cooling loops with a total flow rate of0.0555 m3 s-1 ensur an acceptable temperature distribusure an acceptable temperature distribution in the fertile blanket.

关键词： Molten salt fast reactor Core and blanket thermal-hydraulic analysis Neutronics and thermal hydraulics coupling

Distributed robust matrix-scaled consensus control of perturbed multi-agent systems

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Control Theory and Technology 2024年第4期22卷 623-637页

作者： Bin cheng gang Li Kun An Chunhui Yu Department of Control Science and Engineering Tongji UniversityShanghai201804China Shanghai Research Institute for Intelligent Autonomous Systems Shanghai201210China The Key Laboratory of Road and Traffic Engineering of the Ministry of Education Tongji UniversityShanghai201804China Shanghai Sunshine Rehabilitation Center Shanghai201613China

Distributed matrix-scaled consensus is a kind of generalized cooperative control problem and has broad applications in the field of social network and *** paper addresses the robust distributed matrix-scaled consensus of perturbed multi-agent systems suffering from unknown *** discontinuous protocols are first proposed to drive agents to achieve cluster consensus and suppress the effect of *** protocols with time-varying gains obeying differential equations are also designed,which are completely distributed and rely on no global *** the boundary layer technique,smooth protocols are proposed to avoid the unexpected chattering effect due to discontinuous *** a cost,under the designed smooth protocols,the defined matrix-scaled consensus error tends to a residual set rather than zero,in which the residual bound is arbitrary small by choosing proper ***,distributed dynamic event-based matrix-scalar consensus controllers are also proposed to avoid continuous *** examples are provided to further verify the designed algorithms.

关键词： Matrix-scaled consensus Perturbed multi-agent systems Adaptive control Distributed control Event-triggered control

Adaptive Fuzzy Observer Backstepping Control for a Class of Uncertain Nonlinear Systems with Unknown Time-delay

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International Journal of Automation and computing 2010年第2期7卷 236-246页

作者： shao-cheng Tong Ning Sheng Department of Mathematics Liaoning University of Technology Jinzhou 121000 PRC

In this paper, a new adaptive fuzzy backstepping control approach is developed for a class of nonlinear systems with unknown time-delay and unmeasured states. Using fuzzy logic systems to approximate the unknown nonlinear functions, a fuzzy state observer is designed for estimating the unmeasured states. On the basis of the state observer and applying the backstepping technique, an adaptive fuzzy observer control approach is developed. The main features of the proposed adaptive fuzzy control approach not only guarantees that all the signals of the closed-loop system are semiglobally uniformly ultimately bounded, but also contain less adaptation parameters to be updated on-line. Finally, simulation results are provided to show the effectiveness of the proposed approach.

关键词： Fuzzy logic systems nonlinear time-delay systems adaptive backstepping control state observer stability analysis.

Dual Frequency Transformer for Efficient SDR-to-HDR Translation

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Machine Intelligence Research 2024年第3期21卷 538-548页

作者： gang Xu Qibin Hou Ming-Ming cheng Tianjin Media Computing Center College of Computer ScienceNankai UniversityTianjin300000China

The SDR-to-HDR translation technique can convert the abundant standard-dynamic-range (SDR) media resources to high-dynamic-range (HDR) ones, which can represent high-contrast scenes, providing more realistic visual experiences. While recent vision Transformers have achieved promising performance in many low-level vision tasks, there are few works attempting to leverage Transformers for SDR-to-HDR translation. In this paper, we are among the first to investigate the performance of Transformers for SDR-to-HDR translation. We find that directly using the self-attention mechanism may involve artifacts in the results due to the inappropriate way to model long-range dependencies between the low-frequency and high-frequency components. Taking this into account, we advance the self-attention mechanism and present a dual frequency attention (DFA), which leverages the self-attention mechanism to separately encode the low-frequency structural information and high-frequency detail information. Based on the proposed DFA, we further design a multi-scale feature fusion network, named dual frequency Transformer (DFT), for efficient SDR-to-HDR translation. Extensive experiments on the HDRTV1K dataset demonstrate that our DFT can achieve better quantitative and qualitative performance than the recent state-of-the-art methods. The code of our DFT is made publicly available at https://***/CS-gangXu/DFT.

关键词： Standard-dynamic-range to high-dynamic-range(SDR-to-HDR)translation Transformer dual frequency attention(DFA) frequency-aware feature decomposition efficient model

Correlations of Ni Contents, Formation of Reversed Austenite and Toughness for Ni-Containing Cryogenic Steels

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Acta Metallurgica Sinica(English Letters) 2017年第3期30卷 238-249页

作者： Meng Wang Zhen-Yu Liu cheng-gang Li State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China

It has been widely demonstrated that addition of Ni in low-carbon steels can effectively improve the cryogenic toughness, but the mechanism behind it has yet to be clarified. In the present work, the evolutions of microstructure and mechanical properties after quenching and tempering for Ni-containing cryogenic steels with different Ni contents （3.5-9 wt%） were investigated. The results showed that after quenching and tempering, the Ni-containing cryogenic steels were composed of tempered martensite and reversed austenite. The volume fraction of reversed austenite has increased from 0 up to 6.3% when the Ni content increases from 3.5% to 9%. The Charpy impact tests indicated that the low- temperature toughness was markedly improved with the increase in Ni content, which can be correlated with the increase in reversed austenite amount. The main contribution of reversed austenite to the toughness lies in：（1） the elimination of cementite precipitates improved the plastic deformation capacity of matrix, and （2） the crack propagation is hindered through plastic deformation.

关键词： Ni-containing cryogenic steel Microstructure Reversed austenite Impact toughness Crackpropagation