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Journal of Materials Science & Technology 2023年第10期141卷 171-183页

作者： xuebing liu Mengcheng Zhou Xinfang Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 10083China

The application of duplex stainless steel is severely restricted owing to its inherently low yield strength.A high yield strength of duplex stainless steel is required to address the lightweight issues and re-duce the emission of polluting ***,excellent mechanical properties of duplex stainless steel were achieved using a flash annealing treatment to obtain austenite and ferrite phases with equal hard-ness,and the yield strength doubled without a substantial ductility *** improvement in yield strength was caused by the grain boundary strengthening(a contribution of 60%to the yield strength)and hetero-deformation-induced strengthening(remaining 40%contribution to the yield strength)owing to the significant difference in the strain partitioning between the two *** high strain-hardening capability ensured ductility without a significant decrease;this correlated to the multiple microstruc-ture deformation *** mechanisms included the synergetic deformation of the ferrite with dislocation cell formation and austenite accompanied by the sequential appearance of dislocation accumulation,stacking faults,and deformation-induced nanoscale twins and ***-induced multilevel stacking fault networks and high-density Lomer-Cotterll locks further improved the strain hardening response by enhancing the hetero-deformation behavior of austenite and ferrite.

关键词： Duplex stainless steel Flash annealing Equal hardness Strain partitioning Hetero-deformation

Minimizing serrated flow in Al-Mg alloys by electroplasticity

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Journal of Materials Science & Technology 2019年第6期35卷 1108-1112页

作者： Hui Xu xuebing liu Di Zhang Xinfang Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China State Key Laboratory of Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

Serrated flow under the influence of electroplasticity in Al-Mg alloys is investigated within the dynamic strain aging interpretations of the Portevin-Le Chatelier effect. The stability of plastic region is extended by the pulsed electric current with the increase of critical strain and the extension of waiting ***, the dislocation density, affecting the plastic instabilities due to the interaction between solute atoms and mobile dislocations, is greatly reduced, which plays a dominant role in the suppression of serrated flow.

关键词： Portevin-Le Chatelier effect Dynamic strain aging Dislocation Electroplastic effect Aluminum alloy

Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 659-670页

作者： Haifei Zhou Zhouhai Qian Mengcheng Zhou xuebing liu Yong Li Xinfang Zhang Zhejing Electric Power Corporation Research Institute Hangzhou 310014China State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

High-strength,corrosion-resistant,and lightweight Al-Mg alloys perform an important function in harsh coastal service *** resistance is generally inversely correlated with strength;hence,it is difficult to simultaneously optimize *** this study,a low-magnesium Er-containing Al-based alloy that is stronger and more corrosion resistant than Al-based alloys have been *** alloy contains Er,and the precipitation of Al3 Er within a face-centered cubic matrix is obtained by a series of smelting-casting,heat treatment,and rolling *** is presumed that the strengthening phase of Al3 Er pinning dislocations improves alloy *** also increases the recrystallization temperature of cold-rolled matrix and induces the distribution of small-angle grain boundaries,thus allowing the alloy to achieve excellent environmental corrosion *** a result,strength and corrosion resistance are simultaneously improved.

关键词： Al-Mg alloy Al3Er Strength Corrosion resistance Er

Histone acetylation of the htr3a gene in the prefrontal cortex of Wistar rats regulates ethanol-seeking behavior

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Neural Regeneration Research 2012年第13期7卷 1021-1028页

作者： Yahui Xu xuebing liu Xiaojie Zhang Guanbai Zhang Ruiling Zhang Tieqiao liu Wei Hao Mental Health Institute Second Xiangya Hospital Central South University Changsha 410011 Hunan Province China Townsend Family Laboratories Graduate Program in Neuroscience University of British Columbia 2255 Wesbrook Mall Vancouver B. C V6T 1Z3 Canada Second Affiliated Hospital of Xinxiang Medical University Xinxiang 453003 Henan Province China

Previous reports showed that decreased histone deacetylase activity significantly potentiated the rewarding effects of psychostimulants, and that encoding of the 5-HT3 receptor by the htr3a gene was related to ethanol-seeking behavior. However, the effects of a histone deacetylase inhibitor on ethanol-seeking behavior and epigenetic regulation of htr3a mRNA expression after chronic ethanol exposure are not fully understood. Using quantitative reverse transcription-polymerase chain reaction and chromatin immunoprecipitation analysis, we investigated the effects of chronic ethanol exposure and its interaction with a histone deacetylase inhibitor on histone-acetylation-mediated changes in htr3a mRNA expression in the htr3a promoter region. The conditioned place preference procedure was used to evaluate ethanol-seeking behavior. Chronic exposure to ethanol effectively elicited place conditioning. In the prefrontal cortex, the acetylation of H3K9 and htr3a mRNA expression in the htr3a promoter region were significantly higher in the ethanol group than in the saline group. The histone deacetylase inhibitor sodium butyrate potentiated the effects of ethanol on htr3a mRNA expression and enhanced ethanol-induced conditioned place preferences. These results suggest that ethanol upregulates htr3a levels through mechanisms involving H3K9 acetylation, and that histone acetylation may be a therapeutic target for treating ethanol abuse.

关键词： Ethanol seeking chronic ethanol exposure htr3a histone deacetylase histone acetylation sodiumbutyrate neural regeneration

Clinical characteristics of hospitalised patients with schizophrenia who were suspected to have coronavirus disease(COVID-19)in Hubei Province,China

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General Psychiatry 2020年第2期33卷 73-79页

作者： xuebing liu Hong Lin Haifeng Jiang Ruihua Li Na Zhong Hang Su Yi Li Min Zhao Wuhan Mental Health Center WuhanChina Yichang Special Care Hospital YichangChina Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Mental Health Center ShanghaiChina

Background Since the outbreak of C0VID-19,no data have been available for hospitalised psychiatric patients who are suspected to have *** performed a comprehensive investigation of the clinical features of hospitalised patients with schizophrenia with or without suspected COVID-19 in Hubei Province,*** To explore the clinical characteristics of hospitalised patients with schizophrenia with suspected COVID-19 in Hubei Province,China.M ethods 21 hospitalised patients with schizophrenia with suspected COVID-19(COVID-19 suspected group)in the isolation ward of a mental health hospital in Wuhan and 30 hospitalised patients with schizophrenia(clean group)in the general ward of another mental health hospital in Yichang were *** retrospectively reviewed their clinical characteristics,laboratory findings and chest CT results before 21 February *** also compared the emotional and mental symptoms between the two *** Medical records revealed that 21 COVID-19 suspected patients were transferred to the isolation ward between 30 January 2020 and 15 February *** mean age(SD)of COVID-19 suspected patients was 43.1(2.6).12(57.1%)patients showed abnormalities on chest CT before onset of respiratory symptoms.14(66.7%)patients had psychiatric medications adjustment after detection of abnormal chest CT *** 21 February,one patient was confirmed to have *** though the remaining 20(95.2%)were negative for at least two reverse transcription PCR tests,11(52.4%)patients met the diagnostic criteria for clinically confirmed *** with patients in the clean group,patients in the suspected COVID-19 group showed significantly higher stress,depression and anxiety levels and poorer sleep *** Setting up an independent isolation ward for hospitalised psychiatric patients who are suspected to have symptoms of COVID-19 helped control the spread of the *** with schizophrenia suspected to have COVID-19 showed

关键词： characteristics finding Hubei

ATP Stress Myocardial Contrast Echocardiography Assessment of Coronary Microvascular Disease with Spasmodic Characteristics: A Case Report

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Cardiology Discovery 2023年第3期3卷 221-225页

作者： xuebing liu Chunmei Li Ultrasound in Cardiac Electrophysiology and Biomechanics Key Laboratory of Sichuan Province Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China.

Here, a patient with chest pain and <50% stenosis on coronary angiography, where ATP stress myocardial contrast echocardiography (MCE) revealed that coronary flow reserve was reduced to 1.71 was presented. Perfusion delay occurred in the left ventricular wall of the apex of the heart before ATP stress, and the perfusion delay area was significantly reduced at peak stress. Similar to the characteristics of "reverse redistribution" of radionuclide myocardium perfusion in coronary vasospasm, the delayed perfusion area in the recovery period was larger than that detected before stress. Together with increased spectral resistance of the distal segment of left anterior descending coronary artery and chest pain, these findings indicated coronary microvascular disease with spasmodic characteristics in this patient. The perfusion characteristics on ATP stress determined by MCE and changes in coronary spectrum have value for the diagnosis and treatment of coronary microvascular disease with spasmodic characteristics.

关键词： Echocardiography stress Myocardial contrast echocardiography Coronary microvascular disease Spasm Coronary artery blood flow reserve Case report

Ultrasound-guided continuous adductor canal block for analgesia after total knee replacement

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Chinese Medical Journal 2014年第23期127卷 4077-4081页

作者： Zhang Wei Hu Yan Tao Yan liu xuebing Wang Geng Department of Anesthesiology Beijing Jishuitan Hospital Beijing 100035 China

Background There are several methods for postoperative analgesia for knee *** commonly utilized method is multimodal analgesia based on continuous femoral nerve *** aim of this study was to investigate the application of continuous adductor canal block for analgesia after total knee replacement and compare this method with continuous femoral nerve *** Sixty patients scheduled for total knee replacement from June 2013 to March 2014 were randomly divided into a femoral group and an adductor *** were placed under the guidance of nerve stimulation in the femoral group and under the guidance of ultrasound in the adductor *** were performed under combined spinal and epidural *** the operations,0.2％ ropivacaine was given at a speed of 5 ml/h through catheters in all *** analogue scale （VAS） pain scores at rest and while moving were noted at 4,24,and 48 hours after the operation,and quadriceps strength was also assessed at these *** parameters such as doses of complementary analgesics and side effects were also *** There were no significant differences between the groups in VAS pain scores at rest or while moving,at 4,24,or 48 hours after the operation （P ＞0.05）.At these time-points,mean quadriceps strengths in the adductor group were 3.0 （2.75-3.0）,3.0 （3.0-4.0）,and 4.0 （3.0-4.0）,respectively,all of which were significantly stronger than the corresponding means in the femoral group,which were 2.0 （2.0-3.0）,2.0 （2.0-3.0）,and 3.0 （2.0-4.0）,respectively （P ＜0.05）.There were no significant differences between the groups in doses of complementary analgesics or side effects （P ＞0.05）.X-ray images of some patients showed that local anesthetic administered into the adductor canal could diffuse upward and reach the femoral *** Continuous adductor canal block with 0.2％ ropivacaine could be used effectively for analgesia after total knee *** with

关键词： adductor canal block femoral nerve block ropivacaine total knee replacement multimodal analgesia

Analysis of Lotuses that High-formwork Supports Bear and the Construction Suggestion

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各界 2007年第6期 105-,97页

作者： Zeng Fankui liu xuebing Zhang huazhen Shi xiuqin School of Civil Engineering of Xi'an University of Architecture and Technology Xi'an 710055 Qingdgo Agricultural UniversityQingdao 266109 School of Civil Engineering of Xi'an University of Architecture and TechnologyXi'an 710055 School of Civil Engineering of Xi'an University of Architecture and TechnologyXi'an 710055

With the development of our countryl's city modernization construction,the high-formwork supports system was used more and more,but national standard of high-formwork supports has been not officially promulgated[1]at present,so we do not have a unified standard in high-formwork supports design and *** text puts forward some views about windload by calculating and analyzing the effects that windload causes to the structure.

关键词： high-formwork supports scaffold windload

Analysis of the Difference between Psychiatric Symptoms and Cognitive Functions in Different Mental Disorders

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国际精神病学杂志 2017年第3期44卷 385-388页

作者： YANY Xue YANY Yongde ZHANG Sheng liu xuebing DONG Xiaojie Wuhan Mental Health Center of Tongji Medical College

Objective To analyze the psychiatric symptoms and cognitive functions in patients with depression,bipolar disorder I and II or schizophrenia. Methods Sixty severe depression patients,sixty bipolar disorder patients and sixty schizophrenia patients were selected from January 2015 to January 2016 in our hospital and they were divided into depression group,bipolar group and schizophrenia group. The bipolar group was classified into bipolar I subgroup and bipolar II subgroup. Sixty healthy persons in the same period were selected as the control group to compare the psychiatric symptoms,memory ability and cognitive functions among the groups. Results The score of attention/alertness and executive function of patients in bipolar I group was significantly higher than that in bipolar II group(P< 0.05);the score of attention/alertness,executive function,and learning and memory and processing speed of patients in schizophrenia group was significantly lower than those in those in depression group,bipolar I group and bipolar II group(P< 0.05). The score of executive function of patients in depression group was significantly lower than that in bipolar I group,and the score of processing speed was significantly higher than that in bipolar I group(P< 0.05). Conclusion There was difference between mental symptoms and cognitive functions in patients with bipolar disorders I & II,severe depression and schizophrenia,which is helpful to improve the rate of right diagnosis.

关键词： Bipolar disorder Severe Depression Schizophrenia

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核反应堆用不锈钢老化性能再生研究

核动力工程 2020年第S1期41卷 96-100页

作者：刘学兵张新房北京科技大学冶金与生态工程学院北京100083

针对核反应堆用奥氏体不锈钢和铸造双相不锈钢长期服役会发生严重的热老化脆化问题,导致材料发生脆性断裂的概率增大,严重威胁核反应堆的安全运行。在系统研究时效老化对不锈钢力学性能和微观组织演变影响的基础上,提出利用"第二相粒子... 详细信息

针对核反应堆用奥氏体不锈钢和铸造双相不锈钢长期服役会发生严重的热老化脆化问题,导致材料发生脆性断裂的概率增大,严重威胁核反应堆的安全运行。在系统研究时效老化对不锈钢力学性能和微观组织演变影响的基础上,提出利用"第二相粒子与基体电学性能差异"这一特性,对长期服役老化的不锈钢进行性能修复。研究结果表明:经电磁外场处理后,长期老化不锈钢基体中的有害析出相数密度和调幅分解程度显著下降,不锈钢的韧性得到有效修复,材料的老化程度明显降低,使得不锈钢材料的服役寿命延长近一倍。

关键词：不锈钢热老化脆化电磁外场性能再生延寿