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Synthesis and Luminescence Properties of Ba2 MgSi2 O7 : Eu2+ under UV Excitation

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Journal of Rare Earths 2004年第z1期22卷 129-132页

作者： shi yanning He Dawei Liang Zhongyi Ministry of Education Key Lab Lab of Materials for Information Storage and Display Institute of Photoelectron Technology Beijing Jiaotong University Beijing 100044 China

Eu2+ activated pyrosilicate phosphor were prepared under a reducing atmosphere by solid-state *** crystal structure of Ba2 MgSi2 O7: Eu2+ was analyzed by XRD *** excitation spectrum of Ba2MgSi2 O7; Eu2+ is composed of two broad bands centered at about 310 nm and 395 nm *** the emission spectra, the peak wavelength is at about 507 nm under 380 nm UV *** was found that the introduction of Zn2+ into Ba2MgSi2O7: Eu2+ Can effectively increase its emission intensity without changing the position of emission *** the Eu2 + and Ce3 + codoped pyrosilicate phosphor is the efficient bluish green phosphor under the excitation of long UV light and its emission intensity is stronger than Eu2+ doped pyrosilicate phosphor.

关键词： luminescence pyrosilicate long UV excitation rare earths

Cell concentration,viability and culture composition of airborne bacteria during a dust event in Beijing

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Journal of Environmental Sciences 2017年第5期29卷 33-40页

作者： Hongli Yuan Daizhou Zhang yanning shi Baozhen Li Jinshui Yang Xuejian Yu Nan Chen Makiko Kakikawa State Key Laboratory of Agrobiotechnology College of Biological SciencesChina Agricultural University Faculty of Environmental and Symbiotic Sciences Prefectural University of Kumamoto Institute of Nature and Environmental Technology Kanazawa University

Airborne bacteria were measured when a dust storm passed Beijing in spring 2012 with a focus on cell concentration, viability and TSA- and R2A-cultured strain composition. The concentration varied at an order of 10^7 cells/m3 with dust loading （demonstrated with PM10） and they had a very close correlation （RT2 = 0.91, p 〈 0.01）. At the time of highest PM10 of 652 μg/m3, the bacterial concentration reached 1.4 × 10^8 cells/m3, which was larger than that before and after the dust event by one order. Bacterial viability, the ratio of number concentration of viable cells to total cells, was 32%-64% and smaller in the dust plume than that before the dust arrival. Bacterial strains from the culture ranged between 2.5 × 10^4 and 4.6 × 10^5 CFU/m3 and no correlation with PM10 was determined. Their composition was different before and after the dust arrival according to 16S rRNA gene sequences and strains belong to Actinomycetes and Firmicutes were the majority in the dust samples.

关键词： Bacteria Asian dust Beijing Fluorescence enumeration PM10

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氧传感器气密结构封装研究

现代制造工程 2016年第2期 147-150,154页

作者：石艳宁同济大学汽车学院上海200129

将滑石粉环作为氧传感器的密封材料,采用液压机对氧传感器前端进行封装,采用泄漏机对封装样件做泄漏试验,得出封装力与泄漏量的对应关系,采用发动机台架对氧传感器做热泄漏试验,验收产品结构及封装力的合理性。

关键词：氧传感器气密结构封装试验泄漏试验

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基层医院护理记录中的薄弱环节及对策

基层医学论坛 2006年第18期10卷 820-821页

作者：史彦宁陕西省荣复军人第二医院陕西华阴714200

护理记录是护士根据医嘱和病情对患者在住院期间护理过程的客观记录，是衡量护理人员素质、护理管理水平、护理技术水平和工作效果的标志。同时，在涉及医患纠纷时，作为护患双方举证的依据，可保护医护人员和病人的合法权益。但是，由... 详细信息

护理记录是护士根据医嘱和病情对患者在住院期间护理过程的客观记录，是衡量护理人员素质、护理管理水平、护理技术水平和工作效果的标志。同时，在涉及医患纠纷时，作为护患双方举证的依据，可保护医护人员和病人的合法权益。但是，由于基层医院护士人力资源不足，护理支持系统薄弱，信息相对滞后等原因，致使护理记录的书写不能满足《医疗事故处理条例》、《病历书写基本规范》等法律条文的要求，成为护理工作中潜在的法律问题。为提高护理记录的质量，本文针对护理记录中存在的薄弱环节，提出相关干预措施。[第一段]

关键词：护理记录质量薄弱环节护士长班次

X-Space:Interaction design of extending mixed reality space from Web2D visualization

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Visual Informatics 2023年第4期7卷 73-83页

作者： Tiemeng Li Songqian Wu yanning Jin Haopai shi shiran Liu School of Digital Media&Design Arts Beijing University of Posts and TelecommunicationsChina Beijing Key Laboratory of Network System and Network Culture China

Mixed reality offers a larger visualization space and more intuitive means of interaction for data exploration,and many works have been dedicated to combining 2D visualizations on screen with mixe ***,for each combination,we need to customize the implementation of the corresponding mixed reality 3D *** is a challenge to simplify this development process and enable agile building of mixed reality 3D visualizations for 2D *** addition,many existing 2D visualizations do not provide interfaces oriented to immersive analytics,so how to extend the mixed reality 3D space from existing 2D visualizations is another *** work presents an agile and flexible approach to interactively transfer visualizations from 2D screens to mixed reality 3D *** designed an interactive process for spatial generation of mixed-reality 3D visualizations,defined a unified data transfer framework,integrated data deconstruction techniques for 2D visualizations,implemented interfaces to immersive visualization building tool-kits,and encapsulated these techniques into a tool named *** validated that the approach is feasible and effective through 2D visualization cases including scatter plots,stacked bar charts,and adjacency ***,we conducted expert interviews to discuss the usability and value of the method.

关键词： Mobile and ubiquitous visualization Visualization system and toolkit design Immersive analytic Information data visualization Human-computer interaction

太赫兹光谱和成像技术在毒品识别和检测方面的应用

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现代科学仪器 2006年第2期 41-44页

作者：贾燕李宁逯美红孙金海史艳宁许晓宇梁来顺沈京玲首都师范大学物理系公安部第一研究所

介绍了太赫兹时域光谱和成像技术在毒品识别和检测中的应用研究结果;主要报道了利用太赫兹时域光谱技术对隐藏在信封中的毒品的识别,并对粉末状毒品与片状毒品的太赫兹吸收光谱进行了比较;在理论模拟方面,利用密度泛函理论对毒品振动光... 详细信息

介绍了太赫兹时域光谱和成像技术在毒品识别和检测中的应用研究结果;主要报道了利用太赫兹时域光谱技术对隐藏在信封中的毒品的识别,并对粉末状毒品与片状毒品的太赫兹吸收光谱进行了比较;在理论模拟方面,利用密度泛函理论对毒品振动光谱进行了计算;同时应用太赫兹成像技术对毒品进行了识别。研究结果充分表明太赫兹电磁波在毒品检测和缉毒工作中的有效性。

关键词：太赫兹时域光谱技术振动光谱毒品检测成像

Extraction of Hemicellulose from Acacia Wood via Autohydrolysis and Ethanol Precipitation

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Paper And Biomaterials 2016年第1期1卷 1-14页

作者： HaiQiang shi KaiYuan Guo yanning Sun Na Li Jian Zhang MeiHong Niu QingWei Ping Liaoning Key Lab of Pulp and Papermaking Engineering Dalian Polytechnic University State Key Lab of Pulp and Paper Engineering South China University of Technology

Isolation and utilization of hemicellulose are important processes in the pulp mill-based biorefinery. Considering the potential end use of the hemicellulose,this study investigated the concentration of monomeric and oligomeric sugars in the hydrolysate derived from autohydrolysis of acacia wood and the obtainment of these sugars via ethanol precipitation. The rate of generation of monomers and oligomers increased dramatically with an increase of the temperature from 160℃ to 180℃. The maximum content of oligomers and total sugars was achieved under conditions of 180℃ and 10 min,170℃ and 85 min,respectively. Interestingly,the maximum yield of hemicellulose via ethanol precipitation was achieved in a much shorter time,compared with the maximum yield of oligomer from the hydrolysate by autohydrolysis. A 6. 66 g / L quantity of hemicellulose was obtained by intensifying the conditions of ethanol precipitation. The hemicellulose characteristics were analyzed by Fourier transform infrared,nuclear magnetic resonance,and ultraviolet spectroscopy,and the molecular weight was determined by gel permeation chromatography and thermal analysis.

关键词： autohydrolysis hemicellulose ethanol precipitation biorefinery acacia wood

基于Bresenham画线算法的图像快速-高精度旋转算法

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计算机辅助设计与图形学学报 2007年第11期19卷 1387-1392页

作者：石慎张艳宁郗润平郑江滨西北工业大学计算机学院西安710072

采用Bresenham画线算法增量定位的思想,提出一种基于Bresenham算法的图像旋转快速算法.该算法减少了图像旋转中大量的浮点运算以及取整运算,可以在保证旋转质量的前提下,大幅度地提高图像旋转的效率.实验结果表明,该算法使得平均处理速... 详细信息

采用Bresenham画线算法增量定位的思想,提出一种基于Bresenham算法的图像旋转快速算法.该算法减少了图像旋转中大量的浮点运算以及取整运算,可以在保证旋转质量的前提下,大幅度地提高图像旋转的效率.实验结果表明,该算法使得平均处理速度提高了将近4倍,并且方便了硬件实现.

关键词：快速图像旋转 Bresenham算法增量定位三步法

Effect of human umbilical cord-derived mesenchymal stem cells on lung damage in severe COVID-19 patients:a randomized,double-blind,placebo-controlled phase 2 trial

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Signal Transduction and Targeted Therapy 2021年第3期6卷 888-896页

作者： Lei shi Hai Huang Xuechun Lu Xiaoyan Yan Xiaojing Jiang Ruonan Xu Siyu Wang Chao Zhang Xin Yuan Zhe Xu Lei Huang Jun-Liang Fu Yuanyuan Li Yu Zhang Wei-Qi Yao Tianyi Liu Jinwen Song Liangliang Sun Fan Yang Xin Zhang Bo Zhang Ming shi Fanping Meng yanning Song Yongpei Yu Jiqiu Wen Qi Li Qing Mao Markus Maeurer Alimuddin Zumla Chen Yao Wei-Fen Xie Fu-Sheng Wang Department of Infectious Diseases Fifth Medical Center of Chinese PLA General HospitalNational Clinical Research Center for Infectious DiseasesBeijingChina Wuhan Huoshenshan Hospital WuhanChina Department of Respiratory Changzheng HospitalSecond Military Medical UniversityShanghaiChina Optical Valley Branch of Maternal and Child Hospital of Hubei Province WuhanChina Department of Hematology Second Medical Center of Chinese PLA General HospitalBeijingChina Peking University Clinical Research Institute Peking University First HospitalBeijingChina Department of Infectious Disease General Hospital of Central Theater CommandWuhanChina VCANBIO Cell&Gene Engineering Corp. LtdTianjinChina National Industrial Base for Stem Cell Engineering Products TianjinChina Department of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Key Laboratory of Cancer Center Fifth Medical Center of Chinese PLA General HospitalBeijingChina Department of Endocrinology and Metabolism Changzheng HospitalSecond Military Medical UniversityShanghaiChina Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Nursing Department Fifth Medical Center of Chinese PLA General HospitalBeijingChina immunotherapy Programme Champalimaud Centre for the UnknownLisbonPortugal Med Clinic University of MainzMainzGermany Center for Clinical Microbiology Division of Infection and ImmunityUniversity College Londonand UCL Hospitals NIHR Biomedical Research CentreLondonUK Department of Gastroenterology Changzheng HospitalSecond Military Medical UniversityShanghaiChina

Treatment of severe Coronavirus Disease 2019(COVID-19)is *** performed a phase 2 trial to assess the efficacy andsafety of human umbilical cord-mesenchymal stem cells(UC-MScs)to treat severe coViD-19 patients with lung damage,based onour phase 1 *** this randomized,double-blind,and placebo-controlled trial,we recruited 101 severe coVID-19 patients withlung *** were randomly assigned at a 2:1 ratio to receive either UC-MSCs(4×10^(7)cells per infusion)or placebo on day 0,3,and *** primary endpoint was an altered proportion of whole lung lesion volumes from baseline to day *** imagingoutcomes,6-minute walk test(6-MWT),maximum vital capacity,diffusing capacity,and adverse events were recorded and *** all,100 COVID-19 patients were finally received either UC-MSCs in=65)or placebo(n=35).UC-MSCs administrationexerted numerical improvement in whole lung lesion volume from baseline to day 28 compared with the placebo(the mediandifference was-13.31%,95%Cl-29.14%,2.13%,P=0.08).UC-MSCs significanty reduced the proportions of solid componentlesion volume compared with the placebo(median difference:-15.45%;95%CI-30.82%,-0.39%;P=0.043).The 6-MWT showedan increased distance in patients treated with UC-MSCs(difference:27.00 m;95%CI 0.00,57.00;P=0.057).The incidence of adverseevents was similar in the two *** results suggest that UC-MSCs treatment is a safe and potentially effective therapeuticapproach for COVID-19 patients with lung damage.A phase 3 trial is required to evaluate effects on reducing mortality andpreventing long-term pulmonary disability.

关键词： damage patients double