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Chinese Physics B 2021年第12期30卷 283-290页

作者： xiao-yu shen Shuai Su Hai-Liang Hou School of Automation Central South UniversityChangsha 410083China National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong UniversityBeijing 100044China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong UniversityBeijing 100044China

This paper addresses the distributed optimization problem of discrete-time multiagent systems with nonconvex control input constraints and switching *** introduce a novel distributed optimization algorithm with a switching mechanism to guarantee that all agents eventually converge to an optimal solution point,while their control inputs are constrained in their own nonconvex *** is worth noting that the mechanism is performed to tackle the coexistence of the nonconvex constraint operator and the optimization gradient *** on the dynamic transformation technique,the original nonlinear dynamic system is transformed into an equivalent one with a nonlinear error *** utilizing the nonnegative matrix theory,it is shown that the optimization problem can be solved when the union of switching communication graphs is jointly strongly ***,a numerical simulation example is used to demonstrate the acquired theoretical results.

关键词： multiagent systems nonconvex input constraints switching topologies distributed optimization

Microstructure characterization of a pressureless infiltrating oxidized SiCp preform by Al-8Mg

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International Journal of Minerals,Metallurgy and Materials 2011年第2期18卷 223-228页

作者： Shu-bin Ren xiao-yu shen Xin-bo He Xuan-hui Qu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The microstructure of a pressureless infiltrating 55vol% oxidized SiC preform by Al-8Mg alloy was characterized by transmission electron microscopy （TEM）, high resolution TEM （HRTEM）, field emission scanning electron microscopy （FE-SEM）, and X-ray diffraction. The TEM image of the interface between Al and SiC shows that the surface of SiC is covered by a rough nanocrystal layer of MgAl2O4, Al2O3, and Si, produced by the interfacial reaction of Al, Mg, and SiO2 on the surface of SiC. The Al-SiC interface is also examined by HRTEM to be better understood how MgAl2O4 and Al2O3 are produced. Dendritic Al2O3 crystals are embedded in the pores of the composite generated from the mutual bonding of SiO2 on the surface of SiC. Columnar AlN crystals of about 250 nm in length are bunched vertically on the SiC particle surface.

关键词： microstructure composites interfaces pressureless infiltration oxidation.

Effect of Mg and Si on infiltration behavior of Al alloys pressureless infiltration into porous SiCp preforms

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International Journal of Minerals,Metallurgy and Materials 2011年第6期18卷 703-708页

作者： Shu-bin Ren xiao-yu shen Xuan-hui Qu Xin-bo He School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The effect of Mg and Si additon to Al matrix on infiltration kinetics and rates of Al alloys pressureless infiltration into porous SiCp preform was investigated by observing the change of infiltration distance with time as the Al alloys infiltrate into SiCp preforms at different *** results show that infiltration of SiCp preforms by Al melt is a thermal activation process and there is an incubation period before the infiltration becomes *** the increase of Mg content in the Al alloys from 0wt% to 8wt%,the infiltration will become much easier,the incubation period becomes shorter and the infiltration rate is faster,but these effects are not obvious when the Mg content is higher than 8wt%.As for Si addition to the Al alloys,it has no obvious effect on the incubation period,but the infiltration rate increases markedly with the increase of Si content from 0wt% to 12wt% and the rate has no obvious change when the content is bigger than 12wt%.The effect of Mg and Si on the incubation period is related to the infiltration mechanism of Al pressureless infiltration into SiCp preforms and their impact on the infiltration rate is a combined result from viscosity and surface tension of Al melt and SiC-Al wetting ability.

关键词： metallic matrix composites infiltration aluminum alloys silicon carbide preforms

Microstructure and thermal properties of copper matrix composites reinforced with titanium-coated graphite fibers

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Rare Metals 2013年第1期32卷 75-80页

作者： Hao-Ming Zhang Xin-Bo He Xuan-Hui Qu Qian Liu xiao-yu shen School of Materials Science and Engineering University of Science and Technology Beijing State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing

Milled form of mesophase pitch-based graphite fibers were coated with a titanium layer using chemical vapor deposition technique and Ti-coated graphite fiber/Cu composites were fabricated by hot-pressing sintering. The composites were characterized with X-ray diffraction, scanning/transmission electron microscopies, and by mea- suring thermal properties, including thermal conductivity and coefficient of thermal expansion （CTE）. The results show that the milled fibers are preferentially oriented in a plane perpendicular to the pressing direction, leading to anisotropic thermal properties of the composites. The Ti coating reacted with graphite fiber and formed a continuous and uniform TiC layer. This carbide layer establishes a good metallurgical interracial bonding in the composites, which can improve the thermal properties effectively. When the fiber content ranges from 35 vol% to 50 vol%, the in-plane thermal conductivities of the composites increase from 383 to 407 W.（m.K）-~, and the in-plane CTEs decrease from 9.5 x 10-6 to 6.3 10-6 K-1.

关键词： Metal matrix composites Titanium coating Microstructure Thermal conductivity Coefficient of thermal expansion

Persistent subretinal fluid after successful scleral buckle surgery for macula-off retinal detachment

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Chinese Medical Journal 2011年第23期124卷 4007-4011页

作者： WANG xiao-yu shen Li-ping HU Rong-rong XU Wei Department of Ophthalmology First Affiliated Hospital of College of Medicine Zhejiang University Hangzhou Zhejiang 310003 China

Background After successful scleral buckle and cryotherapy for macular-off retinal detachment （RD）, some patients have poor visual acuity without any clinically detected macular change, and the unsatisfactory postoperative visual acuity is difficult to explain. The purpose of this study was to determine the characteristics of subretinal fluid （SRF） after successful scleral buckle surgery for macula-off RD. Methods Twenty-eight eyes from 28 patients were included in this study. The patients underwent scleral buckle surgery combined with cryopexy for macular-off RD. After surgery, all eyes underwent thorough ophthalmologic examinations including slit-lamp biomicroscopy, best-corrected visual acuity （BCVA） test, and binocular indirect ophthalmoscopy. The BCVA prior to the operation, duration of RD, the duration of postoperative retinal reattachment, BCVA when SRF was observed, period required for the SRF to become undetectable, and the BCVA at the final follow-up were included in the clinical data for this study. Optical coherence tomography （OCT） and B-ultrasonography were used to confirm SRF, and fluorescein angiography （FFA） was carried out in several patients. BCVA when SRF was observed and BCVA at the final follow-up were evaluated using a paired t test. Correlations between BCVA before the operation and duration of RD and BCVA at the final follow-up were analyzed using the Pearson correlation test. The type of SRF under OCT and BCVA at the final follow-up were compared using one-way analysis of variance （ANOVA）. Results Postoperative retinal reattachment was achieved in 1.0-7.0 days （average, （2.7±.2.1） days）. After retinal reattachment, SRF was detected in all eyes by OCT 2 weeks postoperative, while B ultrasonography found no changes. The mean IogMAR BCVA was 0.35±0.27 at the time of the detection of SRF. The period for SRF to become undetectable ranged from 2.0 to 11.0 months （average, （6.3±2.3） months）. The time of follow-up ranged from 24.0 to 36.0 months （a

关键词： subretinal fluid retinal detachment macula-off surgery

An overview of acupuncture for the treatment of limb spasticity in cerebral palsy-A mini review

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Clinical Research Communications 2024年第1期7卷 18-23页

作者： xiao-yu shen Jian-guo Zhong Cui-hua Dan Rehabilitation Department The Second Affiliated Hospital of Chengdu Medical College(China National Nuclear Corporation 416 Hospital)Chengdu 610051China Rehabilitation Department Chengdu Medical CollegeChengdu 610500China

Cerebral palsy is a common chronic disabling disease in children with special needs,and rehabilitation for cerebral palsy is characterized by a long period,multiple methods and limited *** to the limited motor function of cerebral palsy patients,the quality of life of patients is reduced,and their ability to participate in society is reduced,so the improvement of patients’motor function has become an important goal of cerebral palsy *** motor function of cerebral palsy has become an important goal of cerebral palsy *** spasticity is one of the main clinical signs of cerebral palsy patients,and the more severe the limb spasticity is,the greater the impact on the patient's motor function,so improving limb spasticity in patients with cerebral palsy is particularly ***,as a Chinese medicine treatment method,has been widely used in the clinical treatment of cerebral palsy in China,and has shown certain *** promote the clinical application of acupuncture technique in cerebral palsy limb spasticity,this paper analyses and summarizes the relevant literature on acupuncture treatment of cerebral palsy limb spasticity summarizes the current status of the clinical application of acupuncture in cerebral palsy limb spasticity,and provides clinical references for the reasonable application of acupuncture in cerebral palsy limb spasticity.

关键词： cerebral palsy limb spasticity acupuncture treatment mini review

A NEW NONOSCILLATORY CHARACTERISTICS SCHEME FOR HYPERBOLIC CONVECTION EQUATIONS

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Journal of Hydrodynamics 1998年第4期10卷 62-70页

作者： Xin xiao-kang, yu Heng, shen Yi-fanDepartment of Mechanics and Engineering Science, Fudan University, Shanghai 200433,P. R. China

For the second-order charachteristics schemes of hyperbolic convection e-quations, an analysis of the occurring factors of overshoots and undershoots is made, and the nonoscillatory conditions are found. Either the Lax-Wendroff scheme or the second-order upwind scheme is employed according to the value of the smooth parameter rj+-1/2 of the slope ratio of the solution. Numerical results show that the oscillation can be avoided and the high-order accuracy can be preserved. It is verified by a lot of numerical tests on typical examples of scalar convection equations. Further study is required for its extension to the system of hyperbolic equations.

关键词： characteristics method nonoscillatory scheme hyperbolic convection e-quation

Real world effectiveness of PCSK-9 inhibitors combined with statins versus statins-based therapy among patients with very high risk of atherosclerotic cardiovascular disease in China(RWE-PCSK study)

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Journal of Geriatric Cardiology 2021年第4期18卷 261-270页

作者： yu-Qi LIU Dan-Dan LI Meng CHAI Hong-Liang CONG xiao-Qiang CONG Jun DAI Rong-Pin DU Ming GAO Jin-Cheng GUO Yan-Qing GUO xiao-Jian HONG Rong-Chong HUANG Feng-Shun JIA Jia-yu LI Qing LI Jia-Mei LIU Xin-Ping LIU yu-Guo LIU Hong-Gang NIE Bing SHAO xiao-yu shen Hai-Qing SONG Yi-Jun SONG Li-Jun WANG Shuo WANG Dong-Mei WU Jing XIA Zhi-Yong YANG Hong-Ying yu Hui ZHANG Tie-Mei ZHANG Ji-Yi ZHAO Liang-Chen ZHAO Ming-Qi ZHENG yun-Dai CHEN Department of Cardiology Chinese PLA General HospitalBeijingChina Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing Institute of Heart Lung and Blood Vessel DiseaseBeijing Key Laboratory of Precision Medicine of Coronary Atherosclerotic DiseaseClinical Center for Coronary Heart DiseaseCapital Medical UniversityBeijingChina Department of Cardiology Tianjin Chest HospitalTianjinChina Department of Cardiology the First Hospital of Jilin UniversityChangchunChina Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Department of Cardiology Hebei People’s HospitalShijiazhuangChina Department of Cardiology Kailuan General HospitalHebei Union UniversityTangshanChina Department of Cardiology Beijing Luhe HospitalCapital Medical UniversityBeijingChina Department of Cardiology Shanxi Cardiovascular HospitalTaiyuanChina Department of Cardiology the Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina Department of Cardiology Beijing Friendship HospitalCapital Medical UniversityBeijingChina Department of Cardiology Tangshan Worker’s HospitalTangshanChina Department of Cardiology China-Japan Friendship Hospital Affiliated Jilin UniversityChangchunChina Department of Cardiology Handan Central HospitalHebeiChina Heart Center Beijing Key Laboratory of HypertensionBeijing Chao-Yang HospitalCapital Medical UniversityBeijingChina Department of Cardiology the First Affiliated Hospital of Dalian Medical UniversityLiaoningChina Department of Cardiology the Second Affiliated Hospital of Harbin Medical UniversityHarbinChina Department of Cardiology the Second Affiliated Hospital of Shenyang Medical CollegeShenyangChina Department of Cardiology the Second Hospital of Shanxi Medical UniversityTaiyuanChina Department of Neurology Xuanwu Hospital Capital Medical UniversityBeijingChina Department of Neurology Tianjin Medical University Gen

BACKGROUND The efficacy and safety of proprotein convertase subtilisin/kexin type 9(PCSK-9) inhibitors were confirmed by several clinical trials, but its effectiveness in routine clinical practice in China has not been evaluated. This study aims to describe the real world effectiveness of PCSK-9 inhibitors combined with statins compared with statins-based therapy among patients with very high risk of atherosclerotic cardiovascular disease(ASCVD).METHODS This is a multi-center observational study, enrolled patients from 32 hospitals who underwent percutaneous coronary intervention(PCI) from January to June in 2019. There are 453 patients treated with PCSK-9 inhibitors combined with statins in PCSK-9 inhibitor group and 2,610 patients treated with statins-based lipid lowering therapies in statins-based group. The lipid control rate and incidence of major adverse cardiovascular events(MACE) over six months were compared between two groups.A propensity score-matched(PSM) analysis was used to balance two groups on confounding factors. Survival analysis using Kaplan-Meier methods was applied for *** In a total of 3,063 patients, 89.91% of patients had received moderate or high-intensity statins-based therapy before PCI, but only 9.47% of patients had low-density lipoprotein cholesterol(LDL-C) levels below 1.4 mmol/L at baseline. In the PSM selected patients, LDL-C level was reduced by 42.57% in PCSK-9 inhibitor group and 30.81%(P < 0.001) in statins-based group after six months. The proportion of LDL-C ≤ 1.0 mmol/L increased from 5.29% to 29.26% in PCSK-9 inhibitor group and 0.23% to 6.11% in statins-based group, and the proportion of LDL-C ≤ 1.4 mmol/L increased from 10.36% to 47.69% in PCSK-9 inhibitor group and 2.99% to 18.43% in statins-based group(P < 0.001 for both). There was no significant difference between PCSK-9 inhibitor and statins-based treatment in reducing the risk of MACE(hazard ratio = 2.52, 95% CI: 0.49-12.97, P = 0.250).CONCLUSIONS In the real

关键词： LDL RWE-PCSK study Real world effectiveness of PCSK-9 inhibitors combined with statins versus statins-based therapy among patients with very high r

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen shen Zhenghao Wu Xingying Lan Yi xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： Condensation reactions

Evaluation of a new frequency-volume chart for children with primary monosymptomatic nocturnal enuresis:a prospective,comparative study

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World Journal of Pediatrics 2021年第6期17卷 643-652页

作者： Jing-Jing Wang Dong-Jie Wang Hai-Dong Fu De-Xuan Wang Qing Yang xiao-Jie Peng Rui Fu Huan-Dan Yang Rui-Feng Zhang xiao-Wen Wang Jiang-Wei Luan Fei Zhao Qiu-Xia Chen Fang-Fang Liang Lu Cao Jian-Jiang Zhang Ying-Jie Li Yang Dong Hui-Mei Huang Ying Bao xiao-yu shen Wei Zhou Guang-Hai Cao Cui-Hua Liu Yan-Yan Jin Mei-Lin Ma Li Jiang Qian shen Hong Xu Jian-Hua Mao Department of Nephrology TChildren's Hospital of Zhejiang University School of MedicineNational Clinical Research Center of Child HealthHangzhouChina Department of Nephrology The Second Attiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhouChina Department of Nephrology Jiangxi Provincial Children's HospitalNanchangChina Department of Nephrology Xuzhou Children's HospitalXuzhou Medical UniversityXuzhouChina Department of Nephrology Wuhan Children's Hospital(Wuhan Maternal and Child Healthcare Hospital)Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Nephrology Children's Hospital of Nanjing Medical UniversityNanjingChina Department of Rheumatology Shenzhen Children's HospitalShenzhenChina Department of Pediatrics The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenanChina Department of Nephrology Guangzhou Women and Children's Medical CenterGuangzhouChina Department of Nephrology Anhui Provincial Children's HospitalHefeiChina Department of Nephrology The Affiliated Children Hospital of Xi'an Jiaotong UniversityXi'anChina Department of Nephrology Shanghai Children's Medical CenterShanghaiChina Department of Nephrology and Rheumatology Children's Hospital Affiliated to ZhengZhou UniversityHenan Children's HospitalZhengZhou Children's HospitalZhengZhouChina Medical Affairs Department Ferring Pharmaceuticals(Asia)Company LimitedShanghaiChina Marketing Department Ferring Pharmaceuticals(Asia)Company LimitedShanghaiChina Department of Nephrology The Children's Hospital of Fudan UniversityShanghaiChina

Introduction To improve compliance with voiding diaries in children with primary monosymptomatic nocturnal enuresis(PMNE),a new modified 3-day weekend frequency-volume chart(FVC)was designed,and the compliance and validity of this modified FVC was evaluated by comparing with the International Children's Continence Society(ICCS)recommended voiding *** A total of 1200 patients with PMNE were enrolled in the study from 13 centers in China and were randomly assigned to record this modified FVC or the ICCS-recommended voiding *** primary outcome measure was the compliance,assessed by comparing the completing index and the quality score of diaries between two *** secondary outcome measure was the validity,evaluated by comparing the constituent of subtypes,micturition parameters and response rate to *** Among the 1200 participants enrolled in the study,447 patients completed the ICCS-recommended voiding diary and 469 completed the modified *** diurnal completing index and the quality score of the modified FVC group were better than those of the ICCS *** addition,there was no significant difference between these two groups in the subtype classification,or in the response rate to *** The modified FVC could be applied to obtain the voiding characteristics of children with PMNE as the ICCS-recommended voiding diary does and offers a reasonable and better choice for children with PMNE from the unselected population in the future.

关键词： Children Compliance Nocturnal enuresis Voiding diary