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Copper(Ⅱ)-catalyzed enantioselective conjugate addition of nitro esters to 2-enoyl-pyridine N-oxides

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Chinese Chemical Letters 2019年第3期30卷 569-572页

作者： Jianan Sun Yanan Li Yang Gui youguo xu Zhenggen Zha Zhiyong Wang Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China

A highly enantioselective Michael addition of nitro esters to 2-enoyl-pyridine N-oxides was developed by using chiral copper catalysts. The Michael addition products can be obtained in high yields and with up to 96% ee. Moreover, asymmetric Michael addition product of nitromethane to 2-enoyl-pyridine N-oxides can be obtained in one step. An analogue of nicotine, dihydro-2H-pyrrol 4b was synthesized with this developed method.

关键词： Michael reaction Asymmetric catalysis Copper catalysis Nitro esters 2-Enoyl-pyridine N-oxides

Phase Composition Analysis of TiN-AI_2O_3Synthesized from Aluminum-containing Dross and Rutile by Aluminothermic Reductionnitridation Method

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China's Refractories 2014年第3期23卷 40-43页

作者： LIU Haitao MIN Xin JI Haipeng xu youguo FANG Minghao LIU Yangai HUANG Zhaohui School of Materials Science and Technology China University of Geosciences(Beijing)

TiN- Al2O3 composite powder was prepared by aluminothermic reduction- nitridation method with starting materials of aluminum-containing dross and rutile,and metallic aluminum in the aluminum-containing dross as reducer. The influences of synthesis temperature（600-1 400 ℃） and aluminum-containing dross addition（20% lower than theoretical value,theoretical value,20% higher than theoretical value,and 50% higher than theoretical value） on phase compositions and microstructure of the composites were investigated,and the reaction mechanism was analyzed. The results show that（1） TiN- Al2O3 composite powder can be synthesized under the experimental conditions; the main phases are TiN,α-Al2O3,a little bytownite,and MgAl2O4;（2）enhancing synthesis temperature or increasing aluminumcontaining dross addition favors the reaction of aluminothermic reduction- nitridation;（3） in the synthesized products,α-Al2O3 is platy or columnar; TiN is sub-micron granular,which reinforces and toughens the composite.

关键词： aluminum-containing dross futile alumi-nothermic reduction - nitridation titanium nitride -alurnina composite powder phase compositions

多模式神经电生理监测在单节段颈椎前路手术中应用价值的探讨

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潍坊医学院学报 2022年第5期44卷 344-347页

作者：刘登科张安邦李孟徐有国潍坊市中医院麻醉科山东潍坊261041

目的探讨术中神经电生理监测(IONM)在单节段颈椎前路手术中的应用价值方法选择2019年12月~2021年12月在潍坊市中医院诊断为单节段颈椎病(神经根型、脊髓型或者混合型)的52例患者作为研究对象,所有患者行显微镜下颈椎前路椎管减压植骨融... 详细信息

目的探讨术中神经电生理监测(IONM)在单节段颈椎前路手术中的应用价值方法选择2019年12月~2021年12月在潍坊市中医院诊断为单节段颈椎病(神经根型、脊髓型或者混合型)的52例患者作为研究对象,所有患者行显微镜下颈椎前路椎管减压植骨融合内固定手术,按患者是否接受IONM,分为监测组(n=26)和对照组(n=26)。比较两组围术期资料,分析两组术前及手术后1个月、3个月、12个月视觉疼痛模拟评分(VAS),Oswestry功能障碍指数(ODI),比较两组患者神经功能恢复情况。结果监测组术中出血量较对照组减少,出院时间较对照组缩短,差异有统计学意义(P<0.05)。两组术后1个月、3个月、12个月VAS,ODI评分较术前均有改善(P<0.05),监测组术后VAS,ODI评分较对照组改善明显,差异有统计学意义(P<0.05)。结论IONM下显微镜颈椎前路减压植骨融合内固定术不会延长手术时间,能减少术中出血量,缩短住院时间。多模式IONM下行颈椎前路手术可使患者术后神经功能得到较大改善,益于术后神经功能恢复。

关键词：术中神经电生理监测(IONM) 颈椎病前路手术神经功能

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经济与技术在工程项目中的应用

铁路工程造价管理 2003年第6期18卷 14-15,21页

作者：徐有国中铁十六局集团有限公司北京101300

经济与技术在工程项目中相辅相成 ,此文通过理论与实践分析 ,阐述了经济与技术只有在工程项目投标阶段、施工阶段进行有效的应用。

关键词：经济技术工程项目工程投标工程施工理论分析实践分析

1号副井提升机制动油压力监测保护功能的改造

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矿山机械 2023年第4期51卷 63-64页

作者：董礼礼李宾梁福平金有良许有国王存利巴彦淖尔西部铜业有限公司内蒙古乌拉特后旗015543

获各琦铜矿1号副井采用多绳摩擦式提升机,双层单罐笼配置平衡锤,提升高度为525 m,设有8个中段,粉矿回收中段在井下1 453 m处。提升机担负着人员升降、废石提升、采矿设备和材料下放任务[1]。

关键词：副井提升机粉矿回收平衡锤多绳摩擦式提升机提升高度废石压力监测罐笼

CHARACTERISTICS OF TECTONIC MIXTITE ZONE IN THE LANCANG RIVER,WESTERN YUNNAN

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地学前缘 2000年第S1期7卷 272-272页

作者： Liu Dengzhong, Wang Guozhi,Tao Xiaofeng, Zhui Lidong, Li youguo, xu Xinhuang[WT5,5”BX](Chengdu Institute of Technology, Chengdu 610059,China)

Specialists think tectonic mixtite zone in Lancang River, which lies in southern and eastern fringe of Qingzang plateau, is the suture line (or contact strip) between Gondwana Land and Yangtz block (Fan Chengjun, 1982; Liu Zhengqian, etc, 1991; Fang Runsen,1993).By regional geological study (Legend:1∶50000) in Tu’e, western Yunnan, the author think major fracture zone about 6\|8km from western Lancang River is fragile\|ductile shear zone between batholithic granite of Biluo snow mountain and Jurassic\|Cretaceous slight curdle strata. The zone is a very complicated tectonic mixtite zone (width:0.7\|6km; strike: SN\|direction). Study based on geometric structure, constitution, metamorphism, deformation and kinematic characteristics, the author sum up the following features about the complex deformation zone.(1) Tectonic mixtite zone is a very complicate blocks made up of curdle blocks and residual blocks of granite. Its’ geometric structure is a net\|shape structure composed of matrixes and chaotic blocks in plane and have two kinds of structure types (obduction schists in early diagenesis and heteroploytypes in late diagenesis) in section.

关键词： tectonic mixtite zone chaotic block matrix obduction strike\|slip Lancang River

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主井计量漏斗粘矿的处理方法

矿山机械 2022年第12期50卷 66-67页

作者：李宾董礼礼梁福平金有良王存利许有国陈学义巴彦淖尔西部铜业有限公司内蒙古乌拉特后旗015599

获各琦铜矿2号主井提升系统于2021年从手动改造为全自动运行,提升机采用双箕斗提升方式,提升容器为12m3底卸式箕斗,有效载质量为19.5 t/次,提升高度为740 m。矿石破碎后灌入溜井,由输送带输送至计量漏斗,定重装载至主箕斗,提升机上行箕... 详细信息

获各琦铜矿2号主井提升系统于2021年从手动改造为全自动运行,提升机采用双箕斗提升方式,提升容器为12m3底卸式箕斗,有效载质量为19.5 t/次,提升高度为740 m。矿石破碎后灌入溜井,由输送带输送至计量漏斗,定重装载至主箕斗,提升机上行箕斗进入卸矿曲轨自动卸矿并停机。副箕斗同时完成装矿,提升至地面卸载站卸矿[1],如此往复循环提升。

关键词：提升容器主井提升系统矿石破碎定重装载卸载站提升机溜井提升高度

模糊多目标多人决策法在登陆地域选择中的应用

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舰船电子工程 2013年第3期33卷 20-22页

作者：宋剑许友国季大琴海军兵种指挥学院广州510430

针对登陆作战中登陆地域选择的问题,提出了一种基于模糊多目标多人决策法的解决途径,通过对影响登陆作战中登陆地域选择的五大主要指标进行定性、定量分析,给出建模方法,并在此基础上举例验证。

关键词：登陆作战登陆地域模糊多目标多人决策

Dielectric polarization in MgFe_(2)O_(4) coating and bulk doping to enhance high-voltage cycling stability of Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2) cathode material

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Journal of Energy Chemistry 2023年第6期81卷 200-211,I0007页

作者： Xiaoqian xu Yizhen Huang Dan Li Qichang Pan Sijiang Hu Yahao Li Hongqiang Wang youguo Huang Fenghua Zheng Qingyu Li Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004GuangxiChina Hubei Provincial Collaborative Innovation Center for New Energy Microgrid College of Electrical Engineering&New EnergyChina Three Gorges UniversityYichang 443002HubeiChina Guangxi Scientific and Technological Achievements Transformation Pilot Research Base of Electrochemical Energy Materials and Devices Guangxi Normal UniversityGuilin 541004GuangxiChina

Charging P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)to 4.5 V for higher capacity is ***,it leads to severe capacity fading,ascribing to the lattice oxygen evolution and the P2-O2 phase ***,the Mg Fe_(2)O_(4) coating and Mg,Fe co-doping were constructed simultaneously by Mg,Fe surface treatment to suppress lattice oxygen evolution and P2-O2 phase transformation of P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)at deep *** ex-situ X-ray diffraction(XRD)tests,we found that the Mg,Fe bulk co-doping could reduce the repulsion between transition metals and Na+/vacancies ordering,thus inhibiting the P2-O2 phase transition and significantly reducing the irreversible volume change of the ***,the internal electric field formed by the dielectric polarization of Mg Fe_(2)O_(4) effectively inhibits the outward migration of oxidized O^(a-)(a<2),thereby suppressing the lattice oxygen evolution at deep charging,confirmed by in situ Raman and ex situ XPS techniques.P2-Na NM@MF-3 shows enhanced high-voltage cycling performance with capacity retentions of 84.8% and 81.3%at 0.1 and 1 C after *** work sheds light on regulating the surface chemistry for Na-layered oxide materials to enhance the high-voltage performance of Na-ion batteries.

关键词： P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2) MgFe_(2)O_(4) Bulk doping Lattice oxygen evolution P2-O2 phase transformation