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Rare Metals 2019年第6期38卷 495-502页

作者： xiao-chen zhou Fan Yang xiao-Yan Gong Ming Zhao Yu-Feng Zheng Zhi-Li Sun Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China Beijing Percutek Therapeutics Co. Ltd.Beijing 102600China Suzhou Innomed Medical Device Co. Ltd.Suzhou 215123China Schlumberger Technology Corporation HoustonTX 77054USA State Key Laboratory for Turbulence and Complex System College of EngineeringPeking UniversityBeijing 100871China

Abdominal aortic aneurysm(AAA) is one of the most common and catastrophic manifestations of the acute aortic syndrome that can be treated with endovascular aneurysm repair(EVAR) which requires a specially designed stent-graft *** this work, a self-expanding nickel–titanium(nitinol) stent-graft system is aiming at AAA using finite element analysis(FEA) methods to analyze both fatigue behaviors and radial *** on the systematic analysis of the parametric variations, a final stent-graft system was developed by the selection and arrangement of the individual stent components, targeting an optimal performance for the treatment of *** tests, animal tests and clinical trials were carried out to confirm the *** animal trials and clinical trials showed comparable curative effects with Medtronic Endurant stent-graft(SG) systems.

关键词： Nitinol Stent-graft system Abdominal aortic aneurysm Fatigue safety factor Radial force Finite element analysis

Development of a first-order kinetics-based model for the adsorption of nickel onto peat

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Mining Science and Technology 2009年第2期19卷 230-234页

作者： LIU Zhi-rong chen xiao-song zhou Li-min WEI Peng Department of Applied Chemistry East China University of Technology Fuzhou Jiangxi 344000 China

The use of peat for the removal of nickel from aqueous solutions has been investigated at various pH values by means of static conditions. The present research shows that the ability of Ni to bind to peat increases as the pH value increases. The solutions reach adsorption equilibrium rapidly. A reasonable kinetic model, first-order in nickel concentration, has been developed and fitted to the adsorption of nickel （Ⅱ） onto peat. The first-order model provides a good correlation to the experimental data. The characteristic parameters of the Langmuir isotherm were determined at various temperatures. The relationship between kinetics and equilibrium isotherms was established through the forward- and backward-rate-constants, k~ and k2, and the equilibrium constant, K.

关键词： peat nickel adsorption first-order rate model pH isotherm

Robot-assisted retroperitoneal laparoscopic excision of perirenal vascular tumor: A case report

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World Journal of Clinical Cases 2020年第10期8卷 2050-2055页

作者： cheng Zhang Bin Fu Song Xu xiao-chen zhou xiao-Feng cheng Wen-Qing Fu Gong-Xian Wang Department of Urology The First Affiliated Hospital of Nanchang UniversityNanchang 330000JiangXi ProvinceChina

BACKGROUND A vascular tumor is a benign tumor with unique clinical and pathological *** vascular tumor is extremely rare and has not yet been ***,it manifests as soreness and *** ultrasound and renal angiography illustrated the perirenal mass,which was closely connected with the kidney and the surrounding tissues and *** showed extensive embedded perirenal fat,and thin-walled vascular tissue displayed a pink stain due to red blood *** SUMMARY Herein,a case of robot-assisted retroperitoneal laparoscopic excision of a perirenal vascular tumor is *** of the clinical,biological,and histological features of the perirenal vascular tumor can provide an in-depth understanding of the disease,which provides a theoretical and practical basis for better diagnosis and *** This study contributes to a practical basis for the diagnosis and treatment of perirenal hemangiom.

关键词： Kidney Vascular tumor Treatment Robot-assisted surgery

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： pH-dependent micro-environments C–N coupling Dual Cu-based nitrogen carbon catalysts Explicit solvation model Ion stabilizer AIMD

Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao xiao Chaoyang Chu Zhicheng Lin Tianyuan Fang Yuyu zhou Chuxia Zhang Jianghui Shan Shiyu chen Liping Li Department of Physiology and Pharmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo Key Laboratory of Behavioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Addiction Research of Zhejiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's ***,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and ***,nonpharmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully *** this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease ***,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus *** findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzheimer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-like behavior involuntary treadmill exercise olfactory stimulation serum metabolites

农民工劳资冲突行为选择的需求动机实证研究——基于广东调查数据的神经网络判别

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统计与信息论坛 2017年第9期32卷 121-128页

作者：李艳谌晓舟广东金融学院经济贸易系广东广州510521

提出农民工需求层次进阶是其劳资冲突行为选择的微观心理动机,并将需求动机拓展为生存动机需求、社会角色需求、发展需求与精神价值需求的四层次需求模型。通过广东顺德的企业调查,将相关变量进行因子分析,将农民工劳资冲突行为选择的... 详细信息

提出农民工需求层次进阶是其劳资冲突行为选择的微观心理动机,并将需求动机拓展为生存动机需求、社会角色需求、发展需求与精神价值需求的四层次需求模型。通过广东顺德的企业调查,将相关变量进行因子分析,将农民工劳资冲突行为选择的内生性动因归为四个主因子:生存动机需求因子、社会角色需求因子、发展需求因子与精神价值需求因子。通过神经网络判别发现,不同层次的需求对农民工劳资冲突行为选择的影响重要程度不同,其中社会角色需求对农民工劳资冲突行为选择最为重要,其次为生存动机需求和发展需求,而精神价值需求的重要性最小。

关键词：农民工劳资冲突需求动机神经网络判别

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2010年中国电视市场收视动态

现代传播（中国传媒大学学报） 2011年第5期33卷 1-11页

作者：陈晓洲周欣欣央视-索福瑞媒介研究有限公司

2010年中国电视市场大环境相对稳定,常态时期的电视收视总量保持稳定,"内容为王"继续引导竞争方向,不同层级间频道竞争更加激烈。本文通过对2010年电视收视市场动态的分析,可以为透视电视市场现状表象后的动因提供诸多参考。

关键词：电视市场收视动态收视率

人工合成金刚石表面三角锥缺陷的存在机理研究

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人工晶体学报 2010年第6期39卷 1417-1421页

作者：臧传义陈奎谌伦建陈孝洲陈立学河南理工大学材料科学与工程学院焦作454000 吉林大学超硬材料国家重点实验室长春130012

天然金刚石主要生长面为{111},在其表面经常会存在大量凹陷的金字塔状或者底面平整的三角锥蚀坑缺陷,这种缺陷很少出现在人工合成金刚石单晶的表面。本研究在高温高压5.4 GPa、1550 K的条件下,以FeNi合金作为触媒,FeS为添加剂,利用温度... 详细信息

天然金刚石主要生长面为{111},在其表面经常会存在大量凹陷的金字塔状或者底面平整的三角锥蚀坑缺陷,这种缺陷很少出现在人工合成金刚石单晶的表面。本研究在高温高压5.4 GPa、1550 K的条件下,以FeNi合金作为触媒,FeS为添加剂,利用温度梯度法(TGM)直接合成金刚石单晶的{111}表面同样发现有大量凹陷的金字塔状或者底面平整的三角锥蚀坑缺陷。而在体系中加入微量单质B时,高温高压直接合成金刚石单晶的{111}表面不仅存在大量金字塔状的三角锥蚀坑,还出现了天然金刚石表面不曾发现的大量规则的三角凸起平台和凸起的金字塔状或者顶面平整的三角锥缺陷。由此推断,尽管天然金刚石{111}表面经常出现的三角锥缺陷可能是在自然环境中后期腐蚀出现的,而在FeNi-C-FeS体系高温高压直接合成的金刚石单晶{111}表面出现的三角锥缺陷却是在晶体生长过程中直接形成的,FeS在这种表面缺陷的形成过程中起着不可或缺的作用。

关键词：高温高压三角蚀坑金刚石单晶表面缺陷

Effects of Bifidobacterium lactis BLa80 on fecal and mucosal flora and stem cell factor/c-kit signaling pathway in simulated microgravity rats

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World Journal of Gastroenterology 2025年第1期31卷 93-109页

作者： Ping Zhang Ying Zhu Pu chen Tong zhou Zhe-Yi Han Jun xiao Jian-Feng Ma Wen Ma Peng Zang Ying chen Graduate School Hebei North UniversityZhangjiakou 075000Hebei ProvinceChina Key Laboratory of Aerospace Nutrition and Food Engineering China Astronaut Research and Training CenterBeijing 100094China Department of Gastroenterology The Air Force Medical CenterBeijing 100142China Department of Blood Transfusion Air Force Medical CenterBeijing 100142China

BACKGROUND Simulated microgravity environment can lead to gastrointestinal motility *** pathogenesis of gastrointestinal motility disorders is closely related to the stem cell factor(SCF)/c-kit signaling pathway associated with intestinal flora and Cajal stromal ***,intestinal flora can also affect the regulation of SCF/c-kit signaling pathway,thus affecting the expression of Cajal stromal *** cells are the pacemakers of gastrointestinal *** To investigate the effects of Bifidobacterium lactis(***)BLa80 on the intestinal flora of rats in simulated microgravity and on the gastrointestinal motility-related SCF/c-kit *** The internationally recognized tail suspension animal model was used to simulate the microgravity environment,and 30 rats were randomly divided into control group,tail suspension group and drug administration tail suspension group with 10 rats in each group for a total of 28 *** tail group was given *** BLa80 by intragastric administration,and the other two groups were given water intragastric administration,the concentration of intragastric administration was 0.1 g/mL,and each rat was 1 mL/***&eosin staining was used to observe the histopathological changes in each segment of the intestine of each group,and the expression levels of SCF,c-kit,extracellular signal-regulated kinase(ERK)and p-ERK in the gastric antrum of each group were detected by Western blotting and *** fecal flora and mucosal flora of rats in each group were detected by 16S *** Simulated microgravity resulted in severe exfoliation of villi of duodenum,jejunum and ileum in rats,marked damage,increased space between villi,loose arrangement,shortened columnar epithelium of colon,less folds,narrower mucosal thickness,reduced goblet cell number and crypts,and significant improvement after probiotic *** microgravity reduced the expressions of SCF and c-kit,and increased the express

关键词： Simulated microgravity Rat Intestinal flora Gastrointestinal motility Stem cell factor/c-kit signaling pathway

多氯苊化合物分子结构和热力学性质的理论研究

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信阳师范学院学报（自然科学版） 2012年第4期25卷 456-460页

作者：曾小兰陈小周信阳师范学院化学化工学院河南信阳464000

采用密度泛函理论方法,在B3LYP/6-311G**水平上对35个多氯苊化合物的分子几何结构进行了全优化计算,并获得它们在理想气体状态的一些热力学性质参数,研究了这些性质与氯原子数目和位置的关系,根据多氯苊化合物的相对标准生成Gibbs自由... 详细信息

采用密度泛函理论方法,在B3LYP/6-311G**水平上对35个多氯苊化合物的分子几何结构进行了全优化计算,并获得它们在理想气体状态的一些热力学性质参数,研究了这些性质与氯原子数目和位置的关系,根据多氯苊化合物的相对标准生成Gibbs自由能的大小,得到它们的热力学稳定性顺序.结果表明:所有多氯苊分子中除4个氢原子以外的其他原子都在同一平面上.多氯苊最稳定异构体的ΔfHθ及ΔfGθ随Cl原子数目增加而发生的变化与最不稳定异构体不同.具有相同数目氯原子的多氯苊异构体的ΔfHθ和ΔfGθ与氯原子的取代位置有很大的关系,其相对热力学稳定性主要由分子内的处在不同六元环上的邻近Cl…Cl核排斥作用决定.

关键词：多氯苊分子结构热力学性质相对稳定性密度泛函理论