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φ8线材孔型设计

太原重型机械学院学报 1996年第1期17卷 29-33页

作者：王海儒李虎山太原重型机械学院长治钢铁公司

本文介绍一种在小型横列式轧机上由６０ｍｍ方坯径１４道轧制φ８线材的孔型系统，该孔型系统较常规的设计方法节省了两个轧制道次．经多年的生产实践证明，该孔型系统的设计是十分成功的，它对于在小型横列式轧机上生产线材具有一定的... 详细信息

本文介绍一种在小型横列式轧机上由６０ｍｍ方坯径１４道轧制φ８线材的孔型系统，该孔型系统较常规的设计方法节省了两个轧制道次．经多年的生产实践证明，该孔型系统的设计是十分成功的，它对于在小型横列式轧机上生产线材具有一定的理论与实用价值．

关键词：轧机孔型设计线材轧制

倾向性评分匹配达芬奇机器人与腹腔镜直肠癌低位前切除术的近期疗效比较

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实用医学杂志 2019年第9期35卷 1468-1472页

作者：卓凡李太原孙焕奎温祥琼胡家平南昌大学第一附属医院普外科南昌330000

目的比较机器人与腹腔镜直肠癌低位前切除术的短期疗效。方法回顾性分析2015年1月至2016年6月南昌大学第一附属医院行机器人或腹腔镜直肠癌低位前切除术治疗的180例患者的临床病理资料。采用SPSS 22.0软件对患者通过倾向性评分法进行1∶... 详细信息

目的比较机器人与腹腔镜直肠癌低位前切除术的短期疗效。方法回顾性分析2015年1月至2016年6月南昌大学第一附属医院行机器人或腹腔镜直肠癌低位前切除术治疗的180例患者的临床病理资料。采用SPSS 22.0软件对患者通过倾向性评分法进行1∶1匹配,匹配变量包括患者性别、年龄、ASA评分、病理T分期、病理N分期及肿瘤分化程度。最终行机器人直肠癌低位前切除术(机器人组)和腹腔镜直肠癌低位前切除术(腹腔镜组)治疗的各54例患者纳入本研究。比较两组患者的近期疗效。结果两组均无围手术期死亡病例。两组中转开腹率(1.9%vs. 5.6%,P=1.000),淋巴结清扫数目[(13.6±4.0)枚vs.(13.2±5.0)枚,t=-0.438,P=0.663]相似,两组术后进食流质时间[(4.4±1.4)d vs.(4.6±1.1)d,t=1.020,P=0.310],术后住院时间[(8.8±3.2)d vs.(10.4±5.3)d,t=1.897,P=0.061]相似,机器人组术中出血量更少[(101±55)mL vs.(178±182)mL,t=2.979,P=0.004],机器人组和腹腔镜组总并发症的发生率分别为11.1%(6/54)和14.8%(8/54),两组并发症严重程度分级相似,差异无统计学意义(W=44.000,P=0.950)。结论机器人直肠癌低位前切除术能获得与腹腔镜直肠癌低位前切除术相当的近期疗效。

关键词：直肠癌达芬奇机器人手术系统腹腔镜倾向性评分

Dynamic Resistance and Energy Absorption of Sandwich Beam via a Micro-Topology Optimization

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Chinese Journal of Mechanical Engineering 2024年第4期37卷 146-162页

作者： Shiqiang li Yuwei li Xiaomin Ma Jianguang Fang Zhifang liu Zhihua Wang Institute of Applied Mechanics Taiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Material Strength and Structural Impact Taiyuan University of TechnologyTaiyuan 030024China School of Civil and Environmental Engineering University of Technology SydneySydneyNSW 2007Australia

The current research of sandwich structures under dynamic loading mainly focus on the response characteristic of *** micro-topology of core layers would sufficiently influence the property of sandwich ***,the micro deformation and topology mechanism of structural deformation and energy absorption are *** this paper,based on the bi-directional evolutionary structural optimization method and periodic base cell(PBC)technology,a topology optimization frame work is proposed to optimize the core layer of sandwich *** objective of the present optimization problem is to maximize shear stiffness of PBC with a volume *** effects of the volume fraction,filter radius,and initial PBC aspect ratio on the micro-topology of the core were *** dynamic response process,core compression,and energy absorption capacity of the sandwich beams under blast impact loading were analyzed by the finite element *** results demonstrated that the overpressure action stage was coupled with the core compression *** the same loading and mass per unit area,the sandwich beam with a 20%volume fraction core layer had the best blast *** filter radius has a slight effect on the shear stiffness and blast resistances of the sandwich *** increasing the filter radius could slightly improve the bending *** changing the initial PBC aspect ratio,there are three ways for PBC evolution:The first is to change the angle between the adjacent bars,the second is to further form holes in the bars,and the third is to combine the first two ***,not all three ways can improve the energy absorption capacity of the *** the aspect ratio of the PBC arbitrarily may lead to worse *** studies are necessary for further detailed *** research proposes a new topology sandwich beam structure by micro-topology optimization,which has sufficient shear *** micro mechanism of structural

关键词： Topology optimization Sandwich beam Impact loading Dynamic resistance Energy absorption Micro mechanism

Effect of TiO_(2) addition on microstructures and properties of Mgo-Cao refractory aggregates

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Journal of Iron and Steel Research International 2024年第6期31卷 1547-1554页

作者： Shuai Zhang Jing-ran Wang Yuan-gao li Feng-you li Wen Yan Hui-ying Shi The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Joint International Research Laboratory of Refractories and Metallurgy Wuhan 430081HubeiChina Shanxi Luweibao Taigang Refractory Co. Ltd.Taiyuan 030003ShanxiChina

MgO-CaO(40 wt.%CaO)refractory aggregates were prepared using the calcined dolomite and light-burned magnesia fine powder as raw materials and TiO_(2) as *** effect of TiO_(2) on their phase composition,microstructures and properties was investigated by X-ray diffraction and scanning electron *** properties such as bulk density,apparent porosity,relative aggregate tube strength and hydration resistance were also *** results showed that the CaTiO_(3) generated by the reaction between CaO and TiO_(2) was distributed around the CaO grain boundaries and intermittently distributed with MgO,which formed an isolation layer around CaO and greatly improved the hydration ***,the introduction of TiO_(2) promoted sintering and increased the grain size,further improving the strengths and hydration resistance of the *** addition,the most significant enhancement in the hydration resistance and strengths of the samples was achieved when 1.0-2.0 wt.%TiO_(2) was *** this case,the relative strength of aggregate increased from 33.3% to 37.3%-43.1%,and the mass gain after the hydration test decreased from 3.13% to 1.26%-1.45%.

关键词： MgO-CaO refractory aggregate TiO_(2)addition Phase composition Microstructure Hydration resistance

Role of micro-Ca/In alloying in tailoring the microstructural characteristics and discharge performance of dilute Mg-Bi-Sn-based alloys as anodes for Mg-air batteries

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Journal of Magnesium and Alloys 2024年第1期12卷 251-266页

作者： Fei-er Shangguan Wei-li Cheng Yu-hang Chen Ze-qin Cui Hui Yu Hong-xia Wang li-fei Wang Hang li Hua Hou School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300132China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The influence of micro-Ca/In alloying on the microstructural charac teristics,electrochemical behaviors and discharge properties of extruded dilute Mg-0.5Bi-0.5Sn-based(wt.%)alloys as anodes for Mg-air batteries are *** grain size and texture intensity of the Mg-Bi-Sn-based alloys are significantly decreased after the Ca/In alloying,particularly for the In-containing *** that,in addition to nanoscale Mg_(3)Bi_(2)phase,a new microscale Mg_(2)Bi_(2)Ca phase forms in the Ca-containing *** electrochemical test results demonstrate that Ca/In micro-alloying can enhance the electrochemical *** In to alloy the Mg-Bi-Sn-based alloy is effective in restricting the cathodic hydrogen evolution(CHE)kinetics,leading to a low self-corrosion rate,while severe CHE occurred after Ca *** micro-alloying of Ca/In to Mg-Bi-Sn-based alloy strongly deteriorates the compactness of discharge products film and mitigates the"chunk effect"(CE),hence the cell voltage,anodic efficiency as well as discharge capacity are greatly *** In-containing alloy exhibits outstanding discharge performance under the combined effect of the modified microstructure and discharge products,thus making it a potential anode material for primary Mg-air battery.

关键词： Mg-air batteries Mg-Bi-Sn based alloys Electrochemical behaviors Discharge properties

Pre-mating nitenpyram exposure in male mice leads to depression-like behavior in offspring by affecting tryptophan metabolism in gut microbiota

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Journal of Environmental Sciences 2024年第3期137卷 120-130页

作者： Sen Yan Wei Sun Sinuo Tian Zhiyuan Meng Jinling Diao Zhiqiang Zhou li li Wentao Zhu Innovation Center of Pesticide Research Department of Applied ChemistryCollege of ScienceChina Agricultural UniversityBeijing 100193China College of Plant Protection/Joint International Research Laboratory of Agriculture&Agri-Product Safety Yangzhou UniversityYangzhou 225009China College of Plant Protection Shanxi Agricultural UniversityTaiyuan 030031China

Several studies have confirmed that the health status of the paternal affects the health of the offspring,however,it remains unknown whether paternal exposure to pesticides affect the offspring ***,we used untargeted metabolomics and 16S rRNA sequencing technology,combined with tail suspension test and RT-qPCR to explore the effects of paternal exposure to nitenpyram on the neurotoxicity of *** results found that the paternal exposure to nitenpyram led to the offspring’s depressive-like behaviors,accompanied by the reduction of tryptophan content and the disorder of microbial abundance in the gut of the ***,we determined the expression of tryptophan metabolism-related genes tryptophanase(tnaA)and tryptophan hydroxylase 1(TpH1)in gut bacteria and colonic *** found that tryptophan is metabolized to indoles rather than being absorbed into colonocytes,which coursed the reduce of tryptophan availability after nitenpyram *** conclusion,our study deepens our understanding of the intergenerational toxic effects of pesticides.

关键词： Nitenpyram Depressive-like behaviors Gut microbiota Tryptophan metabolism

Photocatalytic ozonation-based degradation of phenol by ZnO—TiO_(2)nanocomposites in spinning disk reactor

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Chinese Journal of Chemical Engineering 2024年第8期72卷 74-84页

作者： Xueqing Ren Jiahao Niu Yan li Lei li Chao Zhang Qiang Guo Qiaoling Zhang Weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering School of Chemistry and Chemical EngineeringNorth University of ChinaTaiyuan 030051China Shanxi Sanqiang New Energy Technology Co. LtdTaiyuan 030051China

Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by advanced oxidation processes(AOPs).In this study,ZnO—TiO_(2)nanocomposites were prepared by solgel method,and coated on the disk of SDR by impregnation-pull-drying-calcination *** performance of catalyst was characterized by X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,photoluminescence and ultraviolet—visible diffuse reflectance *** ozonation in SDR was used to remove phenol,and various factors on degradation effect were studied in *** results showed that the rate of degradation and mineralization reached 100%and 83.4%under UV light irradiation after 50 min,compared with photocatalysis and ozonation,the removal rate increased by 69.3%and 34.7%,and mineralization rate increased by 56.7%and 62.9%,which indicated that the coupling of photocatalysis and ozonation had a synergistic *** radical capture experiments demonstrated that the active species such as photogenerated holes(h^(+)),hydroxyl radicals(·OH),superoxide radical(·O_(2)-)were responsible for phenol degradation,and·OH played a leading role in the degradation process,while h+and·O_(2)^(-)played a non-leading role.

关键词： Spinning disk reactor Photocatalytic ozonation ZnO-TiO_(2)nanocomposites Advanced oxidation processes

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微型 PLC 在跳汰机排料系统中的应用

太原重型机械学院学报 1997年第4期18卷 318-322页

作者：段锁林林廷圻刘仲威牛化龙郭先延李捷吴聚华西安交通大学太原机电研究所太原重型机械学院

本文介绍了由可编程控制器（ＰＬＣ）和单片微型计算机所构成的跳汰机自动排料系统，详述了系统硬件、软件的设计和控制器参数的调整方法，并简述了该控制系统的特点。

关键词： PLC 跳汰机自动排料 PID控制选煤

基于倾向性评分匹配的机器人和腹腔镜直肠癌根治术的对比研究

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中华外科杂志 2019年第6期57卷 447-451页

作者：叶善平时军刘东宁江群广雷雄唐城邱华李太原南昌大学第一附属医院普通外科 330006

目的比较机器人和腹腔镜直肠癌根治术的近期及远期临床疗效。方法回顾性收集2015年1—12月南昌大学第一附属医院普通外科实施的机器人或腹腔镜直肠癌根治术106例患者的临床资料。应用倾向性评分匹配法对机器人和腹腔镜直肠癌根治术的患... 详细信息

目的比较机器人和腹腔镜直肠癌根治术的近期及远期临床疗效。方法回顾性收集2015年1—12月南昌大学第一附属医院普通外科实施的机器人或腹腔镜直肠癌根治术106例患者的临床资料。应用倾向性评分匹配法对机器人和腹腔镜直肠癌根治术的患者进行1∶1匹配,成功匹配机器人组和腹腔镜组各32例患者。机器人组男性15例,女性17例,年龄(56.2±7.5)岁;腹腔镜组男性19例,女性13例,年龄(55.5±7.6)岁。采用t检验、Mann-WhitneyU检验、重复测量方差分析、χ^2检验、Fisher确切概率法或Wilcoxon秩和检验比较两组患者的临床疗效。采用Kaplan-Meier曲线法绘制生存曲线,Log-rank检验对比两组生存曲线的差异。结果匹配后两组患者一般资料具有可比性(P值均>0.05)。64例患者均顺利完成机器人或腹腔镜手术,无中转开腹和围手术期死亡患者。与腹腔镜组对比,机器人组总手术时间更长[(135.7±12.1)min比(124.9±23.2)min,t=2.341,P=0.024],第253组淋巴结清扫时间更短[(11.6±2.7)min比(13.2±2.7)min,t=-2.354,P=0.022],术中出血量更少[(66.8±10.2)ml比(74.8±13.9)ml,t=-2.621,P=0.011],术后尿管留置时间更短[3.0(1.0)d比4.0(2.0)d,Z=-2.743,P=0.006],术后24hC反应蛋白更低[(50.9±7.7)μg/L比(55.9±6.7)μg/L,F=7.902,P=0.007]。两组患者的体内游离时间、淋巴结清扫数目、术后肛门首次排气时间、术后住院时间、术后并发症发生率、术后并发症Clavien-Dindo分级的差异均无统计学意义(P值均>0.05)。两组患者3年总体生存率差异无统计学意义(P>0.05)。结论机器人直肠癌根治术安全性和有效性好,近期疗效好,能获得与腹腔镜直肠癌根治术相似的远期疗效。

关键词：直肠肿瘤机器人腹腔镜检查治疗结果