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A Time Series Observation of Chinese Children Undergoing Rigid Bronchoscopy for an Inhaled Foreign Body： 3149 Cases in 1991-2010

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Chinese Medical Journal 2015年第4期128卷 504-509页

作者： xu Zhang wen-Xian li Yi-Rong Cai Department of Anesthesiology Eye and ENT Hospital Fudan University Shanghai 200031 China

Background：In China,tracheobronchial foreign body （TFB） aspiration,a major cause of emergency episode and accident death in children,remains a challenge for anesthetic ***,we share our experience and discuss the anesthetic consideration and management of patients with TFB ***：This was a single-institution retrospective study in children with an inhaled foreign body between 1991 and 2010 that focused on the complications following rigid bronchoscopy （RB）.Data including the clinical characteristics of patients and TFB,anesthetic method,and postoperative severe complications were analyzed by different ***：During the 20-year study period,the charts of 3149 patients who underwent RB for suspected inhaled TFB were *** were 2079 male and 1070 female patients （1.94：1）.A nut （84％） was the most commonly inhaled *** study revealed a 9％（n =284） overall rate of severe postoperative complications related to severe hypoxemia,laryngeal edema,complete laryngospasm,pneumothorax,total segmental atelectasis,and death with incidences of 3.2％,0.9％,1.3％,0.3％,0.3％,and 0.1％,*** rates of preoperative airway impairment,negative findings of TFB,and adverse postoperative events have been on the rise in the past 5 ***：The survey results confirmed that hypoxemia remains the most common postoperative complication in different *** controlled ventilation and spontaneous ventilation were effective during the RB extraction of the foreign body at our hospital in the modern technique *** active respiratory symptom was commonly seen in the groups with negative findings.

关键词： Complication Inhaled Foreign Body Rigid Bronchoscope

Raman Study of Nitrogen at High Pressure

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Chinese Physics Letters 1997年第6期14卷 440-442页

作者： CHEN liang-chen WANG li-jun GU Hui-cheng xu li-wen CHE Rong-zheng WANG Ji-fang Institute of Physics Chinese Academy of SciencesBeijing 100080

Raman spectra of the nitrogen loaded in a diamond anvil cell with the compressed gas have been investigated at the pressure up to *** was measured in terms of the ruby *** curve of frequency vs pressure was obtained by micro-Raman *** to the experimental results,the frequency of two stretching mode peaks increases steadily from 2340 and 2347cm^(-1) at 5.2 GPa to 2396 and 2434 cm^(-1) at 40 GPa,*** interval between two peaks also increases gradually with pressure increasing.A new peak(2402cm^(-1))of the stretching mode was observed near 40 GPa,which may be associated with the distortion of the Pm3n structure or the formation of low-symmetry structure.

关键词： structure stretching mode

Electrochemical treatment of COD in biologically pretreated coking wastewater using Ti/RuO2-IrO2 electrodes combined with modified coke

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Journal of Coal Science & Engineering(China) 2011年第4期17卷 426-430页

作者： HE xu-wen liU li-yuan GONG Jing-wen WANG Jian-bing QIN Qiang WANG Hao School of Chemical and Environmental Engineering China University of Mining and Technology （Beijing） Beijing 100083China

The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electrochemical perromance of the coke modified with various active components was studied. The results show that the coke modified with Fe（NO3）2 has the lowest energy consumption and higher COD removal rate under the same condition, and the modified coke has better surface characteristics for the purpose of this study. In addition, the kinetic constant was also calculated. The study shows that the three-dimensional electrode system with Fe （NO3）z-modified coke can give a satisfactory solution in biologically pretreated coking wastewater.

关键词： three-dimensional electrode Ti/RuO2-IrO2 anode Fe (NO3)2-modified coke coking wastewater

Gradient Gene Algorithm: a Fast Optimization Method to MST Problem

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Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 535-540页

作者： Zhang Jin bo, xu Jing wen, li Yuan xiang State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072, China State Key Laboratory of Software Engineering Wuhan University Wuhan China

The extension of Minimum Spanning Tree(MST) problem is an NP hard problem which does not exit a polynomial time algorithm. In this paper, a fast optimization method on MST problem——the Gradient Gene Algorithm is introduced. Compared with other evolutionary algorithms on MST problem, it is more advanced: firstly, very simple and easy to realize; then, efficient and accurate; finally general on other combination optimization problems.

关键词： combination optimization minimum spanning tree problem extension of minimum spanning tree problem gradient gene algorithm

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利用结构模板对运动目标进行跟踪

电子与信息学报 2005年第7期27卷 1021-1024页

作者：许东徐文立清华大学自动化系北京100084

该文提出了一种运动目标的两步跟踪算法。该算法首先利用形态学方法得到目标的结构模板,再利用结构模板完成对目标的跟踪。结构模板由目标图像中能够反映目标基本结构信息的稳定的边缘和交叉点构成。跟踪过程分为两步:第一步先把结构模... 详细信息

该文提出了一种运动目标的两步跟踪算法。该算法首先利用形态学方法得到目标的结构模板,再利用结构模板完成对目标的跟踪。结构模板由目标图像中能够反映目标基本结构信息的稳定的边缘和交叉点构成。跟踪过程分为两步:第一步先把结构模板调整到要跟踪的目标附近;第二步作精细调整使结构模板发生形变,收敛到目标图像中的交叉点和边缘处。由于在跟踪过程中考虑了目标的整体结构信息,利用这种方法可以大大提高跟踪的稳定性。

关键词：数学形态学目标跟踪可变形模板

Uncommon Bis-quinolizidine Alkaloids from the Hainan Sponge Neopetrosia chaliniformis

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Chinese Journal of Chemistry 2021年第7期39卷 1838-1842页

作者： Bao Chen Xia-Juan Huan Ze-Hong Miao Nicole J.de Voogd Yu-Cheng Gu Chang-Yun Wang Yue-Wei Guo xu-wen li Key Laboratory of Marine Drugs The Ministry of Education of ChinaSchool of Medicine and PharmacyOcean University of ChinaQingdaoShandong266003 China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences555 Zu Chong Zhi RoadZhangjiang Hi-Tech ParkShanghai201203 China Open Studio for Druggability Research of Marine Natural Products Pilot National Laboratory for Marine Science and Technology(Qingdao)1 Wenhai RoadAoshanweiJimoQingdaoShandong266237 China Syngenta Jealott's Hill International Research CentreBracknellBerkshireRG426EY United Kingdom Naturalis Biodiversity Center P.O.Box 95172300 RALeidenthe Netherlands Leiden University Institute of Environmental SciencesP.O.Box 95182300 RALeidenthe Netherlands

Main observation and conclusion Two new bis-quinolizidine alkaloids,neopetrosiasins A(1)and B(2),possessing cis-and trans-quinolizidine nuclei,one known related analogue petrosin(3)and three known xestospongins(4-6),w... 详细信息

关键词： Sponge 1 Neopetrosia chaliniformis Alkaloids Configuration determination Cytotoxicity

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基于面板数据的城市公共交通经济贡献性分析

交通运输系统工程与信息 2017年第5期17卷 228-234页

作者：温旭丽陈欣南京林业大学交通学院南京210037 东南大学成贤学院南京210088 南京财经大学管理科学与工程学院南京210023

为定量考察公共交通对城市经济的贡献性,本文从固定资产投资、市辖区人口密度和就业人口数等方面,分别建立与公共交通发展指标的面板数据模型,并以江苏为例进行了实证分析.研究表明:公共交通能够显著拉动城市固定资产投资,公交初期阶段... 详细信息

为定量考察公共交通对城市经济的贡献性,本文从固定资产投资、市辖区人口密度和就业人口数等方面,分别建立与公共交通发展指标的面板数据模型,并以江苏为例进行了实证分析.研究表明:公共交通能够显著拉动城市固定资产投资,公交初期阶段的发展模式应以加快完善路网为主,相对成熟阶段则应以运力投放为重点;公共交通对城市人口空间分布表现出显著分散效应,并且仅当城镇化发展到一定水平之后,公交客运总量才产生显著作用;公交发展水平越成熟,其对就业的促进作用越高.公交运力并不直接影响城市就业和引导城市人口分散.地铁开通对固定资产投资的促进作用最为明显,其次是就业的拉动作用.

关键词：城市交通经济贡献性面板数据公共交通广义最小二乘法

A special core-shell material(Mxene@Ag@Phytate)to improve EVA composite fire safety,radiation cross-linking effect,and electromagnetic shielding

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Nuclear Science and Techniques 2025年第2期36卷 27-39页

作者： Si-Yi xu Dan-Yi li wen-Rui Wang lin lin Ying Sun Ji-Hao li lin-Fan li Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

High-performance MXene-based polymer nanocomposites are well-suited for various industrial applications owing to their excellent mechanical,thermal,and other ***,the fabrication of flame-retardant polymer/MXene nanocom-posites remains challenging owing to the limited flame-retardant properties of MXene *** study prepared a novel MXene@Ag@PA hybrid material via radiation modification and complexation *** material was used to further enhance the key properties of ethylene-vinyl acetate(EVA),such as its mechanical properties,thermal conductivity,flame retardancy,and electromagnetic *** addition of two parts of this hybrid material increased the thermal conduc-tivity of EVA by 44.2%and reduced its peak exothermic rate during combustion by 30.1%compared with pure *** material also significantly reduced smoke production and increased the residue *** the X-band,the electromagnetic shielding effectiveness of the EVA composites reached 20 ***,the MXene@Ag@PA hybrid material could be used to further enhance the mechanical properties of EVA composites under electron-beam ***,this study contributes to the development of MXene-based EVA advanced materials that are fire-safe,have high strength,and exhibit good electromagnetic shielding performance for various applications.

关键词： MXene@Ag@PA Ethylene-vinyl acetate(EVA) Flame retardancy Electromagnetic shielding performance

Application of Microwave Heating Technique to Esterification

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Chemical Research in Chinese Universities 1992年第4期8卷 465-467页

作者： liU Fu-an, xu wen-guo and li Yao-xian (Department of Chemistry, Jilin University, Changchun, 130023)

Introduction Although the application of microwave technique has been reported as a new type of energy source chemically, it is only in recent years that this technique has been used as the energy source for organic synthesis. In 1986, R. Gedye, et al., published the report of the benzoate synthesis from the respective reactions between benzene carboxylic acid and methanol, propanol or butanol under microwave heating and the catalysis of H;SO;.

关键词： Microwave heating Esterification