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World Journal of Gastroenterology 2024年第21期30卷 2827-2828页

作者： li-zhi yi Sheng-Bing Zhao Department of Gastroenterology The People’s Hospital of LeshanLeshan 614000Sichuan ProvinceChina Department of Gastroenterology Changhai HospitalThe Second Military Medical University/Naval Medical UniversityShanghai 200433China

The combination of endoscopic ultrasound with endoscopic treatment of type 1 gastric variceal hemorrhage may improve the robustness and generalizability of the findings in future ***,the esophageal varices should also... 详细信息

关键词： Gastric varices Esophageal varices Endoscopic band ligation Endoscopic tissue adhesive injection Endoscopic ultrasound

Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays

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Frontiers of physics 2016年第2期11卷 57-65页

作者： li-Hua Qian li-zhi yi Gui-Sheng Wang Chao Zhang Song-liu Yuan School of Physics Huazhong University of Science and Technology Wuhan 430074 China Flexible Electronics Center Huazhong University of Science and Technology Wuhan 430074 China

Creating nanoscale and sub-nanometer gaps between noble metal nanoparticles is critical for the applications of plasmonics and nanophotonics. To realize simultaneous attainments of both the op- tical spectrum and the gap size, the ability to tune these nanoscale gaps at the sub-nanometer scale is particularly desirable. Many nanofabrication methodologies, including electron beam lithography, self-assembly, and focused ion beams, have been tested for creating nanoscale gaps that can de- liver significant field enhancement. Here, we survey recent progress in both the reliable creation of nanoscale gaps in nanoparticle arrays using self-assemblies and in the in-situ tuning techniques at the sub-nanometer scale. Precisely tunable gaps, as we expect, will be good candidates for future investigations of surface-enhanced Raman scattering, non-linear optics, and quantum plasmonics.

关键词： surface plasmon tunable plasmonic gap quantum plasmon surface-enhanced Raman scattering self-assembly nanoparticle array

Synthesis,Crystal Structure and Fluorescence Property of [Y(sip)(H_2O)_4]_n with 5-Sulfoisophthalate ligand

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1057-1062页

作者： WANG Yan PAN Zhao-Rui WANG Zuo-Wei HU Zheng li yi-zhi ZHENG He-Gen Coordination Chemistry Institute State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210093 China Key Laboratory for Mesoscopic Chemistry. of Ministry of Education College of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title complex, [Y（sip）（H2O）4], （sip = 5-sulfoisophthalate）, has been synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray analysis. The crystal belongs to the orthorhombic system, space group Pna21, a = 7.235（4）, b = 16.456（5）, c = 10.316（3） A, V = 1228.2（9） A^3, Z = 4, Mr = 404.14, Dc = 2.186 g/cm63, F（000） = 808,μ= 4.979 mm^-1, the final R = 0.0474 and wR = 0.1125 for 2122 observed reflections with I 〉 2σ（I）. The structural analysis shows that the intermolecular hydrogen bonds and π-π interactions result in a three-dimensional supramolecular structure. The complex shows intense luminescence in solid state at room temperature.

关键词： crystal structure hydrogen bond network structure luminescence

Unconventional room-temperature negative magnetoresistance effect in Au/n-Ge:Sb/Au devices

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Chinese Physics B 2024年第3期33卷 602-608页

作者：何雄杨凡黎牛浩峪王立峰易立志许云丽刘敏潘礼庆夏正才 Hubei Engineering Research Center of Weak Magnetic-field Detection College of ScienceChina Three Gorges UniversityYichang 443002China Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China

Non-magnetic semiconductor materials and their devices have attracted wide attention since they are usually prone to exhibit large positive magnetoresistance(MR)effect in a low static magnetic field environment at room ***,how to obtain a large room-temperature negative MR effect in them remains to be *** this paper,by designing an Au/n-Ge:Sb/Au device with metal electrodes located on identical side,we observe an obvious room-temperature negative MR effect in a specific 50 T pulsed high magnetic field direction environment,but not in a static low magnetic field *** the analysis of the experimental measurement of the Hall effect results and bipolar transport theory,we propose that this unconventional negative MR effect is mainly related to the charge accumulation on the surface of the device under the modulation of the stronger Lorentz force provided by the pulsed high magnetic *** theoretical analytical model is further confirmed by regulating the geometry size of the *** work sheds light on the development of novel magnetic sensing,magnetic logic and other devices based on non-magnetic semiconductors operating in pulsed high magnetic field environment.

关键词： magnetoresistance germanium-based devices pulsed high magnetic fields

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锰的两种配位聚合物的合成和晶体结构

无机化学学报 2006年第10期22卷 1788-1792页

作者：卓馨李一志宿州学院光电化学实验室南京大学配位化学研究所配位化学国家重点实验室南京210093

用水热法合成2个新的三维配位聚合物:[Mn2(Pyzca)2Cl2]n(1)和[Mn2(Pyzca)2Br2]n(PyzcaH=2-Pyrazinecarboxylicacid)(2),并对这2个聚合物进行了元素分析、红外光谱、X-射线单晶等表征。配合物1和2的晶体都属于三斜晶系,P1空间群。配合物1... 详细信息

关键词：锰配合物 2-吡嗪甲酸晶体结构

一种新的基于跨层优化的Ka频段卫星MPLS网络快速重路由策略

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宇航学报 2009年第5期30卷 2008-2014页

作者：栗志意翟立君曹志刚刘序明清华大学电子工程系北京100084

卫星多协议标签交换(MPLS)组网技术为下一代卫星网的关键技术。通过定义星地无线链路的失效事件,分析Ka频段高轨卫星网络(GEO)星地链路失效间的相关性,提出了一种新的基于跨层优化的卫星MPLS网络快速重路由备份链路选路策略;且针对星地... 详细信息

卫星多协议标签交换(MPLS)组网技术为下一代卫星网的关键技术。通过定义星地无线链路的失效事件,分析Ka频段高轨卫星网络(GEO)星地链路失效间的相关性,提出了一种新的基于跨层优化的卫星MPLS网络快速重路由备份链路选路策略;且针对星地链路失效的物理层特性,进一步提出了一种新的基于对源端优先采用的失效欺骗策略。仿真结果显示:提出的快速重路由备份链路选路策略,可以有效减少受保护链路失效期间由于备份链路同时失效而导致业务中断的概率,提高了快速重路由成功率;通过对源端优先采用失效欺骗,可有效减小由源端发起新建全路径重路由的概率,节省了卫星网络的资源消耗和信令开销,提高了链路失效期间卫星网络的性能。

关键词：高轨卫星网络(GEO) 跨层优化多协议标签交换(MPLS) 流量工程(TE) 快速重路由

Virtual reality system for diagnosis and therapeutic planning of cerebral aneurysms

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Chinese Medical Journal 2010年第16期123卷 2206-2210页

作者： MO Da-peng BAO Sheng-de li liang yi zhi-qiang ZHANG Jia-yong ZHANG Yang Department of Neurosurgery Peking University First HospitalBeijing 100034 China

Background The virtual reality （VR） system can provide the neurosurgeon to intuitively interact with and manipulate the three dimensional （3-D） image similarly to manipulate a real *** was seldom reported that the system was used in diagnosis and treatment of cerebral *** study aimed to investigate the application of VR system in diagnosis and therapeutic planning of cerebral *** A total of 24 cases of cerebral aneurysms were enrolled in this study from 2006 to 2008, which diagnosed by 3-D digital subtraction angiography （3D-DSA） or VR-based computed tomography angiographies （CTA）.The VR system and 3D-DSA system were used to observe and measure aneurysms and the adjacent *** data of observation and measurements were compared between VR image and 3D-DSA *** the patients underwent surgical plan and simulated neurosurgical procedures in the VR *** There were 28 aneurysms detected in VR system and 3D-DSA *** VR system generated clear and vivid 3-D virtual images which clearly displayed the location and size of the aneurysms and their precise anatomical spatial relations to the parent arteries and *** location, size and shape of the aneurysms and their anatomical relationship with the adjacent vessels were similar between 3-D virtual image and 3D-DSA, but the spatial relationship between aneurysms and skull only been displayed by VR *** VR system also could simulate simple surgical procedures and surgical *** The VR system can provide a highly effective way to provide precise imaging details as same as 3D-DSA system and assist the diagnosis of cerebral aneurysms with virtual 3-D data based on *** significantly enhances the chosen therapeutic strategy of cerebral aneurysms.

关键词： intracranial aneurysm angiography, digital subtraction computed tomographic angiography virtual reality images, surgical planning

Aniline destruction by supercritical water oxidation and its reaction kinetics

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Journal of Environmental Science and Engineering 2009年第7期3卷 14-17页

作者： WANG Jing-chang ZHAO Qi-cheng li zhi-yi ZHANG Ping Institute of Chemistry Dalian University Dalian 116622 China Institute of Chemistry Dalian University of Technology Dalian 116012 China

Supercritical water oxidation （SCWO） is an effective method for wastewater treatment. In this study, a lot of experiments are carried out to study the influence of various factors on the aniline destruction rate in the SCWO process with a novel experiment setup. The experimental results show that the aniline destruction rate rises with the increase of the residence time, the reaction temperature and the reaction pressure. A dynamics analysis of the aniline SCWO reaction is conducted and the dynamic equation is obtained.

关键词： wastewater treatment supercritical water oxidation aniline destruction

Porosity of polystyrene membranes prepared by supercritical CO2-induced phase inversion

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Journal of Chemistry and Chemical Engineering 2008年第4期2卷 1-7,34页

作者： li zhi-yi TANG Hui-hua liUXue-wu XIA Yuan-jing ZHANG Cun-wei JIANG Jing-zhi （Research ＆ Design Institute of Fluid and Powder Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 China）

Microporous asymmetric polystyrene （PS） membranes were prepared by supercritical CO2-induced phase inversion. The effects of different process parameters, such as temperature, COe pressure and PS concentration in casting solution, on the membrane morphologies, pore size distribution and especially on the porosity of the membranes were experimentally investigated. The porosity showed a tendency of increasing to a maximum and then decreasing with an increase of temperature, CO2 pressure or PS concentration. The effects of process parameters on the membrane porosity were explained based on the properties of supercritical fluids.

关键词： polystyrene microporous membrane porosity supercritical CO2 phase inversion

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再制造产品担保主体及担保效率研究

运筹与管理 2016年第5期25卷 249-257页

作者：李宁李帮义刘志南京航空航天大学经济与管理学院江苏南京210016 郑州航空工业管理学院国际学院河南郑州450015

本文从产品担保的视角出发,用博弈论的方法对由单一生产商和单一销售商组成的再制造系统进行分析,讨论并比较了由生产商、销售商和整个再制造系统提供产品担保时各方的最优决策。结果表明:最优担保主体的选择取决于各方单位产品担保成... 详细信息

本文从产品担保的视角出发,用博弈论的方法对由单一生产商和单一销售商组成的再制造系统进行分析,讨论并比较了由生产商、销售商和整个再制造系统提供产品担保时各方的最优决策。结果表明:最优担保主体的选择取决于各方单位产品担保成本的对比关系,需理性比较制造商、销售商与再制造系统的担保效率,进而确定最优产品担保主体。

关键词：供应链管理再制造博弈论产品担保