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Influence of Reaction Conditions on Methanol Synthesis and WGS Reaction in the Syngas-to-DME Process

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Journal of Natural Gas Chemistry 2006年第1期15卷 38-44页

作者： Ligang Wang Deren Fang Xingyun Huang shigang zhang Yue Qi Zhongmin Liu Dalian fastitute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Institute of Applied Catalysis Yantai University Yantai 264005 China

A series of CuO-ZnO catalysts （with different Cu/Zn molar ratios） were prepared, and evaluated under the reaction conditions of syngas-to-dimethyl ether （DME） with three sorts of feed gas and different space velocity. The catalysts were characterized by X-ray diffraction （XRD） and temperatureprogrammed reduction （TPR）. The experiment results showed that the reaction conditions of syngas-to- DME process greatly affected the methanol synthesis and WGS reaction. The influence caused by Cu/Zn molar ratio was quite different on the two reactions; increasing of percentage of CO2 in feed gas was unfavorable for catalyst activity, and also inhibited both reactions; enhancement of reaction space velocity heavily influenced the performance of the catalyst, and the benefits were relatively less for methanol synthesis than for the WGS reaction.

关键词： copper zinc Cu/Zn molar ratio methanol dimethyl ether water gas shift reaction syngas dehydration

Laser-Assisted Reduction of Highly Conductive Circuits Based on Copper Nitrate for Flexible Printed Sensors

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Nano-Micro Letters 2017年第4期9卷 49-61页

作者： Shi Bai shigang zhang Weiping Zhou Delong Ma Ying Ma Pooran Joshi Anming Hu Institute of Laser Engineering Beijing University of Technology School of Civil and Transportation Engineering Beijing University of Civil Engineering and Architecture Oak Ridge National Laboratory Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville

Stretchable electronic sensing devices are defining the path toward wearable electronics. High-performance flexible strain sensors attached on clothing or human skin are required for potential applications in the entertainment,health monitoring, and medical care sectors. In this work,conducting copper electrodes were fabricated onpolydimethylsiloxane as sensitive stretchable microsensors by integrating laser direct writing and transfer printing approaches. The copper electrode was reduced from copper salt using laser writing rather than the general approach of printing with pre-synthesized copper or copper oxide nanoparticles. An electrical resistivity of 96 l X cm was achieved on 40-lm-thick Cu electrodes on flexible substrates. The motion sensing functionality successfully demonstrated a high sensitivity and mechanical *** in situ fabrication method leads to a path toward electronic devices on flexible substrates.

关键词： Laser direct writing Copper circuit Stretchable sensor Laser reduction

Ouyang,Z.Y.(Ed.),*** Geologic Map Series of the Moon(including Map Quadrangles of the Geologic Atlas of the Moon&Geologic Atlas of the Lunar Globe).Geological Publishing House,Beijing,China.

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Geoscience Frontiers 2024年第6期15卷 545-546页

作者： Yajun Liu Jinjian Wu shigang zhang Geological Publishing House Beijing 100083China

The publication of the Geologic Map Series of the Moon(including Map Quadrangles of the Geologic Atlas of the Moon&Geologic Atlas of the Lunar Globe)was supported by the National Publication Foundation(China),and was selected as part of the“13th Five-Year”National Key Publications Publishing Planning *** Geologic Map Series of the Moon was completed based on scientific exploration data from China’s Chang’e Project and other existing lunar geological information and research *** this mapping project,the“Three Eons and Six Periods”of the lunar time scale based on the geological evolution history of the Moon was first proposed,expressing 14 types of structure that are formed by endogenic or exogenic processes,17 types of lithology that are formed by endogenic processes,and 11 types of crater materials or *** addition,the technical requirements and standards for the compilation of geologic maps of the Moon were systematically formulated with independent intellectual property rights.

关键词： Map Globe formations

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Ku波段微波小功率放大器的设计

低温与超导 2007年第4期35卷 364-366页

作者：张士刚中国电子科技集团公司第十六研究所合肥230043

文中论述了利用修正的S参数法,设计了Ku波段微波小功率放大器,具有功率增益高和可靠性高的优点。利用这种设计方法,设计并制作了两个实验的功率放大器。

关键词：功率放大器 S参数

Effects of 0.2% ropivacaine combined with sufentanil on percutaneous transforaminal endoscopic discectomy surgery anesthesia

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Effects of 0.2% ropivacaine combined with sufentanil on perc...

microendoscopic discectomy and percutaneous transforaminal endoscopic discectomy in the treatment of lumbar disc herniation:a randomized controlled study and its effect on lumbar function

中国中西医结合学会神经外科专业委员会第六届学术大会暨广东省中西医结合学会神经外科专业委员会2019年学术年会及继续教育学习班

作者：吕雪丰 Zhao jianmin Yu yingxin zhang shigang The Neurosurgery of the Hospital of Fengning Manchu Autonomous County Chengde Medical College Department of Anesthesiology the Hospital of Fengning Manchu Autonomous CountyChengde Medical College

Objective To investigate effects of 0.2% ropivacaine combined with sufentanil on percutaneous transforaminal endoscopic discectomy surgery *** A total of 100 patients underwent percutaneous transforaminal endoscopic discectomy surgery were divided into experimental group(n=50) and control group(n=50).The experimental group was treated by epidural catheter injection of 0.2%ropivacaine and sufentanil anesthesia,the control group using 2% lidocaine local *** block,cellular immune function and the changes of stress response of 2 groups were compared before and after *** was no significant difference between the 2 groups in operation time,intraoperative blood loss and postoperative bed time(P>0.05);The sensory nerve block time,Bromage and VAS scores of the experimental group were significantly lower than those of the control group,the Ramsay scores was significantly higher than that of the control group(P0.05),but significantly higher than the control group after anesthesia(P0.05),the ratio of CD and CD after anesthesia was significantly higher than that in the control group,CD4+/CDwas significantly lower than that in the control group(P<0.01),the ratio of CD4+and CD/CDin the control group were significantly lower than those before anesthesia,and the ratio of CDwas significantly higher than that before anesthesia(P<0.01).Conclusion 0.2% ropivacaine combined with sufentanil on percutaneous transforaminal endoscopic discectomy surgery have obviousanesthesia and nerve block effects,and can effectively relieve the pain of the body,reduce the stress reaction,have little effect on the immu

关键词： Percutaneous transforaminal endoscopic disectomy surgery Ropivacaine Sufentanil Anesthesia

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microendoscopic discectomy and percutaneous transforaminal e...

中国中西医结合学会神经外科专业委员会第六届学术大会暨广东省中西医结合学会神经外科专业委员会2019年学术年会及继续教育学习班

作者：吕雪丰 zhang shigang Yu yingxin Zhao Jianmin The Neurosurgery of the Hospital of Fengning Manchu Autonomous County Chengde Medical College Department of anaesthesia the Hospital of Fengning Manchu Autonomous CountyChengde Medical College

Objective To investigate the clinical effects of microendoscopic discectomy(MED) and percutaneous transforaminal endoscopic discectomy(PTED) in the treatment of lumbar disc herniation(LDH) and its effect on lumbar *** 150 patients with LDH admitted in our hospital from October 2014 to October 2016 were randomly divided into control group(n=75) and experimental group(n=75).The control group were treated with MED,and the experimental group were treated with *** operation status of2 groups were *** ODI index,JOA score and lumbar functional recovery were evaluated at preoperation and 3 months *** levels of serum IL-1β,MMP-3 and TNF-a in 2 groups were *** Compared with the control group,the bleeding volume and treatment expenses in experimental group reduced significantly,the incision length,operation time,hospitalization time and walking time shortened significantly(P<0.01).3 months postoperation,the ODI indexes of 2 groups were significantly lower than preoperation,JOA score and lumbar flexion,extension,left flexion,right flexor strength increased significantly,there was significant difference between 2 groups(P<0.05 or P<0.01).The levels of IL-1β,MMP-3 and TNF-α in 2 group decreased gradually from 1 day to 3 months postoperation,and experimental group were lower than that of the control group(P<0.05 or P<0.01).Conclusion PTED has a significant effect on LDH,which can promote the recovery of lumbar function,restrain the inflammatory reaction of the lumbar vertebrae,and has the advantage of small trauma,quick recovery and low cost of treatment,worthy of clinical promotion.

关键词： lumbar disc herniation microendoscopic discectomy percutaneous transforaminal endoscopic discectomy lumbar vertebral function lumbar muscle strength

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建筑工程多媒体仿真系统的研制与应用

清华大学学报（自然科学版） 1999年第10期39卷 104-107页

作者：吴炜煜张士纲清华大学土木工程系清华大学建筑设计研究院京100084

为充分利用高新技术，拓展现阶段建筑工程计算机仿真的内容、手段和表现模式，建立了集成建筑场景三维建模、结构静／动态响应分析以及仿真结果三维实时动态显示的仿真系统ＳＩＭＵＷＨＩＳ。在系统研制中，提出并实现了集建筑建模器－... 详细信息

为充分利用高新技术，拓展现阶段建筑工程计算机仿真的内容、手段和表现模式，建立了集成建筑场景三维建模、结构静／动态响应分析以及仿真结果三维实时动态显示的仿真系统ＳＩＭＵＷＨＩＳ。在系统研制中，提出并实现了集建筑建模器－结构分析器－仿真演示器于一体的三器一体化的建筑工程辅助设计和软件开发思路。经实践证明可广泛应用于建筑工程领域的多种开发与研究范围，尤其在求解建筑结构的时态运动描述上，更适合建筑科学和工程设计的需要。

关键词：建筑工程风荷载多媒体仿真 SIMUWHIS

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X波段低温低噪声放大器的研制

低温与超导 2009年第12期37卷 70-74页

作者：张士刚杨斌中国电子科技集团公司第16研究所合肥230040 中国电子科技集团公司低温电子技术研发中心合肥230043

介绍了X波段低温低噪声放大器的设计和实验结果。该放大器采用HEMT器件三级级联,频率范围为8 500MHz^8 850 MHz,在环境温度大约20K的环境下,噪声温度小于11K,输入输出回波损耗小于-25dB,功耗小于25mW,0~40GHz内无条件稳定。

关键词：低温低噪声放大器 HEMT器件 VLT法

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基于Co-ah循环的热电联产集中供热方法

清华大学学报（自然科学版） 2008年第9期48卷 1377-1380,1412页

作者：付林江亿张世钢清华大学建筑技术科学系北京100084 北京科技大学土木与环境工程学院北京100083

为了降低大型热电联产集中供热系统能耗,该文提出了一种基于Co-ah循环的热电联产集中供热方法。在热力站设吸收式换热机组,使热网回水温度降低至约20℃,在热电厂内经汽轮机凝汽器、吸收式热泵和调峰热源等环节将热网回水逐级加热,形成... 详细信息

为了降低大型热电联产集中供热系统能耗,该文提出了一种基于Co-ah循环的热电联产集中供热方法。在热力站设吸收式换热机组,使热网回水温度降低至约20℃,在热电厂内经汽轮机凝汽器、吸收式热泵和调峰热源等环节将热网回水逐级加热,形成热网的吸收式(Co-ah)循环。通过拉大供回水温差而大幅增加热网的输送能力,并通过回收汽轮机排汽余热而显著提升热电厂供热能力和能源利用效率。

关键词：热电联产集中供热吸收式换热 Co—ah循环