检索结果-南通市图书馆

Gas Pool Coupled Activating TIG Welding Method with Coupling Arc Electrode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2018年第6期31卷 169-176页

作者： Yong Huang rui-lin liu Yan-Zhao Hao State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou 730050 China Department of Aviation Manufacture Engineering Chengdu Aeronautic Polytechnic Chengdu 610100 China Technology Center Great Wall Motor Company Limited Baoding 071000 China

Gas pool coupled activating TIG(GPCA?TIG) welding put forward in?house can dramatically enhance weld penetration of TIG welding through introducing active element oxygen to reverse the Marangoni convection flow in the molten pool. In order to further improve the welding productivity, the normal solid tungsten electrode is replaced by a kind of coupling arc electrode. The changes of arc pressure distribution along anode surface and the weld appearance were evaluated. On this basis, the dependences of weld shape characterized with weld depth, width and undercut on the main welding parameters were discussed. The results indicate, the substitution of coupling arc electrode can lead to an obvious decrease of arc pressure. Compared to hollow tungsten electrode and twin tungsten electrodes, the coupling arc electrode is much easier to manufacture and has more compacter structure. Combined with the symmetric distribution of arc pressure in di erent directions, this electrode has extensive adaptability. In the GPCA?TIG welding with coupling arc electrode, both the substitution of coupling arc electrode and the introduction of outer active gas oxygen can reduce the possibilities of producing humping bead and undercut. Their joint action makes this welding method have the capability of realizing high travel speed and deep penetration welding.

关键词： GPCA?TIG welding Coupling arc electrode Oxygen Arc pressure Weld shape Welding parameter

维普期刊数据库

Mussel-inspired one-step adherent coating micrometer-sized magnetic carbon fiber aerogel as a bioartificial liver for efficient removal of bilirubin

在线全文

学校读者我要写书评

暂无评论

Mussel-inspired one-step adherent coating micrometer-sized m...

Functional changes of intestinal mucosal barrier insurgically critical patients

2016年全国高分子材料科学与工程研讨会

作者： rui-lin liu Pei Yu Yan-Hui Ge Qiang Fu School of Pharmacy Xi’an Jiaotong University

Here,we report a facile hydrophilization method via co-deposition of polydopamine(PDA)and polyethyleneimine(PEI)on a micrometer-sized magnetic carbon fiber(MSMCF)aerogel for removel of *** MSMCF aerogel was prepared according to our group previous report with slight *** show that the PAD/PEI coated MSMCF have a twisted fiber shape with a size range of 80-120μm in diameter and hierarchically porous structure(Figure 1).The deposition time is greatly shortened and the surface hydrophilicity is significantly improved compared to the MSMCF decorated only by *** MSMCF@PDA/PEI have a maximum monolayer adsorption capacity of335.12 mg g,which is remarkably higher than those of the direct calcination of cotton(34 mg g),MSMCF(188 mg g),millimetre-sized mesoporous carbon spheres(148.4 mg g),clinical activated carbon(70 mg g),CMK-3(198 mg g),hollow mesoporous carbon spheres(304 mg g)and even N-HPCMs-5-1-1073(298.8 mg g)we reported *** was demonstrated that the MSMCF@PDA/PEI successfully competed with albumin for the adsorption of bilirubin,and could effectively adsorb bilirubin from bilirubin-enriched ***,this study may pave the way for improving the performance of the adsorbent in removing blood toxins during hemoperfusion.

关键词： magnetic carbon fiber aerogel bilirubin bioartificial liver polydopamine

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2010年第3期1卷 205-208页

作者： Yuan-yuanGuo Mu-linliu Xian-di He Cong-qiao Jiang rui-lin liu Department of Gastrointestinal Surgery Afliated Hospital of Bengbu MedicalCollegeBengbu233004China

BACKGROUND： The gut is capable of inducing multiple organ dysfunction syndrome （MODS）. In the diagnosis and treatment of critical ill patients, doctors should pay particular attention to the protection or recovery of intestinal barrier function. However, no reliable diagnostic criteria are available clinically. This study aimed to assess the changes of intestinal mucosal barrier function in surgically critical ill patients as well as their signi？ ***： Thirty-eight surgically critical ill patients were enrolled as a study group （APACHE II〉8 scores）, and 15 non-critical ill patients without intestinal dysfunction were selected as a control group （APACHE II〈6）. General information, symptoms, physical signs, and APACHE II scores of the patients were recorded. The patients in the study group were subdivided into an intestinal dysfunction group （n=26） and a non-intestinal dysfunction group （n=12）. Three ml venous blood was collected from the control group on admission and the same volume of plasma was collected from the study group both on admission and in the period of recovery. The plasma concentrations of endotoxin, diamine oxidase （DAO）, D-lactate, and intestinal fatty-acid binding protein （iFABP） were detected respectively. The data collected were analyzed by the SPSS 17.0 software for Windows. RESULTS： The levels of variables were significantly higher in the study group than in the control group （P〈0.01）. They were higher in the intestinal dysfunction group than in the non-intestinal dysfunction group （DAO P〈0.05, endotoxin, D-lactate, iFABP P〈0.01）. In the non-intestinal dysfunction group compared with the control group, the level of endotoxin was not significant （P〉0.05）, but the levels of DAO, D-lactate and iFABP were statistically significant （P〈0.05）. The levels of variables in acute stage were higher than those in recovery stage （P〈0.01）.The death group showed higher levels of variables than the survival group （endotoxin and D-lactate P〈0.01, DAO a

关键词： Intestinal mucosal barrier Endotoxin Diamine oxidase D-lactate Intestinal fatty-acid binding protein

5 - 17 Study of CsI（TI） Scintillation Detector＇s Properties for Gamma-ray Measurement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2012年第1期 236-237页

作者： Jin Zengxue Chen Zhiqiang Han rui lin Weiping liu Xingquan Zhang Suyalatu liu Jianli Shi Fudong

大鼠急性坏死性胰腺炎NF-κB的变化及乌司他丁的调控作用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界华人消化杂志 2005年第22期13卷 2700-2703页

作者：刘瑞林刘牧林马良龙吴薇蚌埠医学院附属医院胃肠外科安徽省蚌埠市233004 淮北市人民医院肝胆外科安徽省淮北市235000

目的:探讨乌司他丁对急性坏死性胰腺炎大鼠核因子-κ B(NF-κB)的表达及有关细胞因子的影响．方法:将30只Sprague-Dawley大鼠随机分为假手术组(SO 组)、急性坏死性胰腺炎组(ANP组)和急性坏死性胰腺炎乌司他丁治疗组(UTI组),比较各组大鼠... 详细信息

目的:探讨乌司他丁对急性坏死性胰腺炎大鼠核因子-κ B(NF-κB)的表达及有关细胞因子的影响．方法:将30只Sprague-Dawley大鼠随机分为假手术组(SO 组)、急性坏死性胰腺炎组(ANP组)和急性坏死性胰腺炎乌司他丁治疗组(UTI组),比较各组大鼠NF-κB、IL-6、 TNF-α、血清淀粉酶的水平．结果:ANP组淀粉酶活性195 907．51±38 618．39 nkat／L, TNF-α值41.37±7．54 ng／L,IL-6值32．32±8．62 ng/L,肺、胰腺组织NF-κB表达增加,与SO组比较P均<0．01,乌司他丁治疗后,淀粉酶活性69 804．30±19 432．55 nkat／L,TNF-α值 18．66±6．45 ng／L,IL-6值23．41±7．65 ng／L,肺、胰腺组织NF- κB表达降低,与SO组和ANP组比较P均<0．01．结论:急性坏死性胰腺炎时NF-κB活化,上调IL-6、TNF-α, 加重胰腺及肺的损伤,乌司他丁抑制NF-κB表达而减轻胰腺及肺的损伤,改善急性坏死性胰腺炎的预后．

关键词：急性坏死性胰腺炎乌司他丁 NF-κB 肺损伤 IL-6 TNF-α 血清淀粉酶

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen liu Xuliang lin Xueqing Qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

基于冷却液控制参数的柴油机变海拔热平衡试验

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

工程热物理学报 2018年第9期39卷 2103-2111页

作者：杨春浩刘瑞林刘楠刘振明周磊海军工程大学动力工程学院武汉430033 陆军军事交通学院军用车辆系天津300161

利用自主设计的柴油机高海拔热平衡试验系统,进行不同模拟海拔(0 m、3500 m、5500 m)基于冷却液控制参数的电控共轨柴油机全负荷热平衡试验,研究了柴油机变海拔热平衡规律,全面分析了变海拔条件下冷却系统控制参数对整机热平衡影响的机... 详细信息

利用自主设计的柴油机高海拔热平衡试验系统,进行不同模拟海拔(0 m、3500 m、5500 m)基于冷却液控制参数的电控共轨柴油机全负荷热平衡试验,研究了柴油机变海拔热平衡规律,全面分析了变海拔条件下冷却系统控制参数对整机热平衡影响的机理与规律,优化标定了不同模拟海拔下最佳冷却液流量。结果表明:随海拔升高,发动机热负荷升高,集中表现在缸内燃烧温度峰值增加且对应曲轴转角减小;全工况冷却系统散热量呈普遍下降趋势,高散热量区分布在全负荷的中高转速区。冷却液温度由60℃升至80℃,冷却系统散热量占比下降4.1%,有效功率和排气散热量占比分别增加约1.7%、1%,且随海拔升高,冷却液温度对热平衡的影响更加明显。随着冷却液循环流量的增加,冷却系统散热量明显增加,有效功率与排气散热量变化不明显;不同海拔条件下,当冷却液流量达到某一限值时,冷却系统散热量增加幅度都开始减缓,全速全负荷工况下,这一限值随海拔升高(0～5500 m)由18.5 m^3/h增至20 m3/h。

关键词：电控共轨柴油机冷却液温度循环流量高海拔热平衡

维普期刊数据库

Liposomes as versatile agents for the management of traumatic and nontraumatic central nervous system disorders:drug stability,targeting efficiency,and safety

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1883-1899页

作者： Mingyu Zhang Chunyu Xiang Renrui Niu Xiaodong He Wenqi Luo Wanguo liu rui Gu Department of Orthopedic Surgery China-Japan Union Hospital of Jilin UniversityChangchunJilin ProvinceChina

Various nanoparticle-based drug delivery systems for the treatment of neurological disorders have been widely ***,their inability to cross the blood–brain barrier hampers the clinical translation of these therapeutic *** are nanoparticles composed of lipid bilayers,which can effectively encapsulate drugs and improve drug delivery across the blood–brain barrier and into brain tissue through their targeting and ***,they can potentially treat traumatic and nontraumatic central nervous system *** this review,we outlined the common properties and preparation methods of liposomes,including thin-film hydration,reverse-phase evaporation,solvent injection techniques,detergent removal methods,and microfluidics ***,we comprehensively discussed the current applications of liposomes in central nervous system diseases,such as Alzheimer's disease,Parkinson's disease,Huntington's disease,amyotrophic lateral sclerosis,traumatic brain injury,spinal cord injury,and brain *** studies related to liposomes are still in the laboratory stage and have not yet entered clinical ***,their application as drug delivery systems in clinical practice faces challenges such as drug stability,targeting efficiency,and ***,we proposed development strategies related to liposomes to further promote their development in neurological disease research.

关键词： Alzheimer's disease amyotrophic lateral sclerosis brain tumors central nervous system Huntington's disease liposome drug delivery neurological disorders Parkinson's disease spinal cord injury traumatic brain injury

维普期刊数据库

Multi-receptive field interaction network for shape from polarization

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期 394-395页

作者： Yini PENG rui liu Zhiyuan ZHANG Zhongyuan WANG Jiayi MA Xin TIAN Electronic Information School Wuhan University Computer Science School Wuhan University Wuhan Institute of Quantum Technology

Shape from polarization (SfP) method can use the polarization information in reflected light to estimate the surface normal of the target,which can further reconstruct the shape of the *** a simple image capture process,it can use low-cost equipment to meet a high precision imaging requirement,which can be used in remote scenes and other applications.

关键词：