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Inductively Coupled Plasma Mass Spectrometry as a Reference Method to Evaluate Serum Calcium Measurement Bias and the Commutability of Processed Materials during Routine Measurements

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chinese Medical Journal 2018年第13期131卷 1584-1590页

作者： Hai-jian Zhao Meng-Lei Ge Yin Yan Tian-Jiao zhang Jie Zeng Wei-Yan Zhou Yu-Fei {2. Qing-Hui Meng Chuan-Bao zhang National Center for Clinical Laboratories Beijing Hospital National Center of Gerontology Beijing Engineering Research Center of Laboratory Medicine Beijing 100730 China Department of Clinical Laboratory Children's Hospital Capital Institute of Pediatrics Beijing 100020 China graduate school Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

Background： Measuring total serum calcium is important for the diagnosis of diseases. Currently, results from commercial kits for calcium measurement are variable. Generally, the performance of serum calcium measurements is monitored by external quality assessment （EQA） or proficiency testing schemes. However, the commutability of the EQA samples and calibrators is often unknown, which limits the effectiveness of EQA schemes. The aim of this study was to evaluate the bias of serum calcium measurements and the commutability of processed materials. Methods： Inductively coupled plasma mass spectrometry was applied as a comparative method, and 14 routine methods were chosen as test methods. Forty-eight serum samples from individual patients and 2. processed materials were quantified. A scatter plot was generated from patient samples, and 95% prediction intervals were calculated to evaluate the commutability of the processed materials and measurement bias at three concentration levels was used to determine the accuracy of routine assays. Results： All assays showed high precision （total coefficient of variation [CV] 〈2.2.%） and correlation coefficients （r 〉 0.99）. For all assays, the mean bias for the 48 patient samples ranged from 0.13 mmol/L to 0.00 mmol/L （-5.61 0.01%）, and the ranges for the three concentrations were 0.10-0.04 mmoUL （-5.71-2.35%）, -0.14-0.01 mmol/L （-5.80-0.30%）, and -0.19-0.04 mmol/L （-6.2.-1.2.%）. The EQA samples, calibrators, and animal sera exhibited matrix effects in some assays; human serum pools were commutable in all assays; certificate reference materials were commutable in most assays, and only GBW09152.exhibited a matrix effect in one assay： and aqueous reference materials exhibited matrix effects in most assays. Conclusions： Biases for most assays were within the acceptable range, although the accuracy of some assays needs improvement. Human serum pools prepared from patient samples were commutable, and the other tested materials exhibited

关键词： Calibration Bias Commutability Inductively Coupled Plasma Mass Spectrometry Matrix Effect Serum Calcium

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The Relationship between Polymorphisms at 17 Gene Sites and Hypertension among the Aboriginal Tibetan People

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Biomedical and Environmental sciences 2012年第5期25卷 526-532页

作者： LI Kui LIANG Yu SUN Yin zhang Ling Xia YI Xin CHEN Yong GU SANG LA MU wang {2. beijing Institute of Genomics Chinese Academy of Sciences Beijing 100029 China The People's Hospital of the Tibet Autonomous Region Lasha 850000 China Institute of Tuberculosis The 309th Hospital of Chinese People's Liberation Army Beijing 100091 China The graduate university of{2. Beijing 100049 China

Abstract Objective The incidence of hypertension in Tibet ranks highest among all chinese provinces. This may be due to genetic changes caused by Tibet＇s unique natural environment and agrarian lifestyle, prompting us to investigated the relationship between gene polymorphisms and hypertension. Methods Blood samples were collected from 2.9 hypertensive participants and 372.healthy （control） participants from five Tibetan counties. Seventeen single nucleotide polymorphisms were investigated for their connection to hypertension. Results The C allele at rs2.70744 of the NOS3 gene was shown to be significantly associated with hypertension （P=0.0443; OR=1.636）. Additionally, the T allele of rs4961 of the ADD gene was correlated with hypertension in women （P=0.0312.; OR=1.584）. Conclusion In this study we found that the NOS3 and ADD genes were related to a high incidence of hypertension among Tibetans. N053 gene plays a role in regulating vascular tone and blood vessel diameter, which may be altered by the low-oxygen environment of Tibet. ADD is involved in water and salt metabolism, which is consistent with the high-salt diet of Tibetans. The correlations elucidated by our study were different from those of other ethnic groups, indicating that these findings may be specific to the Tibetan people.

关键词： Genetic polymorphism Hypertension Tibetan

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A Nonresonant Hybridized Electromagnetic-Triboelectric Nanogenerator for Irregular and Ultralow Frequency Blue Energy Harvesting

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Research 2021年第1期2021卷 304-315页

作者： Weibo Xie Lingxiao Gao Lingke Wu Xin Chen Fayang wang Daqiao Tong jian {2. jianyu Lan Xiaobin He Xiaojing Mu Ya Yang State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Key Laboratory of Optoelectronic technology&Systems Ministry of Education International R&D Center of Micro-Nano Systems and New Materials TechnologyChongqing UniversityChongqing 400044China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China College of Aerospace Engineering Chongqing UniversityChongqing 400044China Shanghai academy of Spaceflight technology Shanghai Institute of Space Power SourceShanghai 200245China school of Nanoscience and technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004China

As a promising renewable energy source,it is a challenging task to obtain blue energy,which is irregular and has an ultralow frequency,due to the limitation of ***,a nonresonant hybridized electromagnetic-triboelectric nanogenerator was presented to efficiently obtain the ultralow frequency *** instrument adopted the flexible pendulum structure with a precise design and combined the working principle of electromagnetism and triboelectricity to realize the all-directional vibration energy acquisition *** results confirmed that the triboelectric nanogenerator(TENG)had the potential to deliver the maximum power point of about 470μW while the electromagnetic nanogenerator(EMG)can provide 52. mW at *** conversion efficiency of energy of the system reached 48.48%,which exhibited a remarkable improvement by about 2.96 times,due to the elastic buffering effect of the TENG with the double helix ***,its ability to collect low frequency wave energy was successfully proven by a buoy in Jialing *** woke provides an effective candidate to harvest irregular and ultralow frequency blue energy on a large scale.

关键词： generator precise instrument

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A facile solvent-free synthesis strategy for Co-imbedded zeolite-based Fischer-Tropsch catalysts for direct gasoline production

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chinese Journal of Catalysis 2020年第4期41卷 604-612页

作者： Mudassar Javed Shilin Cheng Guihua zhang Cederick Cyril Amoo Jingyan wang Peng Lu Chengxue Lu Chuang Xing {2. Sun Noritatsu Tsubaki school of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou 310023ZhejiangChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina beijing Booming Highchem technology Co. LTDBeijing 100005China Department of Applied Chemistry Graduate School of EngineeringUniversity of ToyamaGofuku 3190Toyama 9308555Japan

A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding *** catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based *** transformation of solid raw materials to targeted zeolite was confirmed by XRD,SEM,STEM,and N2.physisorption *** in-depth study of acidic strength and acidic site distribution was conducted by NH3-TPD and Py-IR *** strength showed a pivotal role in defining product ***@S1,with the weakest acidic strength of silicalite-1 among three types of zeolites,evaded over-cracking of product and exhibited the highest gasoline and isoparaffin selectivity(≈70%and 30.7%,respectively).Moreover,the solvent-free raw material grinding route for zeolite synthesis accompanies several advantages like the elimination of production of wastewater,high product yield within confined crystallization space,and elimination of safety concerns regarding high pressure due to the absence of the *** and easiness of the solvent-free synthesis route together with promising catalytic performance strongly support its application on the industrial scale.

关键词： Solvent-free synthesis Co-imbedded zeolite catalyst Fischer-Tropsch synthesis Gasoline Isoparaffin

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Positron-Impact Excitation of Hydrogen Atoms in Debye Plasmas

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chinese Physics Letters 2010年第1期27卷 111-114页

作者：张松斌祁月盈屈一至陈向军王建国 Hefei National Laboratory for Physical sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei 230026 Key Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics PO Box 8009 Beijing 100088 school of Electrical Engineering Jiaxing University Jiaxing 314001 College of Material sciences and Optoelectronic technology Graduate School of the Chinese Academy of Sciences PO Box 4588 Beijing 100049

The positron-impact excitation of hydrogen atoms embedded in plasma environments is investigated using the close-coupling approximation from the low to intermediate energy region without including any positronium formation channel, and the excitation cross sections for 1s→2., 1s→2. and 2.→2. processes are calculated in a wide Debye parameter range. The screening interactions, described by the Debye-Hückel model, decrease the coupling matrix elements, resulting in the reduction of the excitation cross sections from a few percent to one magnitude of ten. This will alter remarkably the spectroscopy of hydrogen in intensity and position, which should be considered in the simulation and diagnostics under some specific plasma conditions.

关键词： chinese climate network complex systems small world community

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Diversity and independent evolutionary profiling of rodent-borne viruses in Hainan,a tropical island of china

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Virologica Sinica 2023年第5期38卷 651-662页

作者： Youyou Li Chuanning Tang Yun zhang Zihan Li Gaoyu wang Ruoyan Peng Yi Huang Xiaoyuan Hu Henan Xin Boxuan Feng Xuefang Cao Yongpeng He Tonglei Guo Yijun He Haoxiang Su Xiuji Cui Lina Niu Zhiqiang Wu {2. Yang Fan Yang Gang Lu Lei Gao Qi Jin Meifang Xiao Feifei Yin {2.g Du NHC Key Laboratory of Systems Biology of Pathogens Institute of Pathogen BiologyChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing100005China Department of Clinical Laboratory Center for Laboratory MedicineHainan Women and Children's Medical CenterHaikou571199China Key Laboratory of Tropical Translational Medicine of Ministry of Education Hainan Medical UniversityHaikou571199China Hainan Medical university-The university of Hong Kong Joint Laboratory of Tropical Infectious Diseases Hainan Medical UniversityHaikou571199China Department of Pathogen Biology Hainan Medical UniversityHaikou571199China

The risk of emerging infectious diseases(EID)is increasing *** than 60%of EIDs worldwide are caused by animal-borne *** study aimed to characterize the virome,analyze the phylogenetic evolution,and determine the diversity of rodent-borne viruses in Hainan Province,*** collected 682.anal and throat samples from rodents,combined them into 2. pools according to their species and location,and processed them for next-generation sequencing and bioinformatics *** diverse viral contigs closely related to mammals were assigned to 2. viral *** clues of the important rodent-borne viruses were further identified by polymerase chain reaction for phylogenetic analysis and annotation of genetic characteristics such as arenavirus,coronavirus,astrovirus,pestivirus,parvovirus,and *** identified pestivirus and bocavirus in Leopoldoms edwardsi from Huangjinjiaoling,and bocavirus in Rattus andamanensis from the national nature reserves of Bangxi with low amino acid identity to known pathogens are proposed as the novel species,and their rodent hosts have not been previously reported to carry these *** results expand our knowledge of viral classification and host range and suggest that there are highly diverse,undiscovered viruses that have evolved independently in their unique wildlife hosts in inaccessible areas.

关键词： Rodents Virome Phylogenetic analysis Novel viruses Wildlife

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双清合剂治疗卫气同病证流行性感冒有效性和安全性多中心随机对照非劣效性试验

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中国中西医结合杂志 2024年第9期44卷 1036-1043页

作者：林江涛孙增涛封继宏吴建华陆光兵郭瑞斌麻晓李月荣申云红王光恩马晓斌黄滔郭安张常喜赵小兵孙绪武江柏华甄会陈红平丁俊平中日友好医院呼吸与危重症医学科北京100029 天津中医药大学热病与呼吸疾病研究所天津300250 天津中医药大学第二附属医院呼吸与危重症医学科天津300250 山西省汾阳医院呼吸与危重症医学科山西032200 眉山市中医医院呼吸与危重症医学科四川620000 阳煤集团总医院呼吸与危重症医学科四川620000 漯河市中医院急诊科河南462000 济南市章丘区人民医院感染性疾病科济南250200 长治市第二人民医院感染疾病科山西046000 邯郸市中医院呼吸科河北056001 山东省立医院呼吸与危重症医学科济南250000 眉山市人民医院发热门诊四川620000 天津中医药大学研究生院天津300250 宁夏回族自治区中医医院肺病科银川750000 枣庄妇幼保健院呼吸科山东277000 牡丹江市中医医院呼吸科黑龙江157000 黑龙江省中医医院肺病科哈尔滨150036 中国中药协会呼吸病药物研究专业委员会北京100061 北京药海宁康医药科技有限公司北京100101 哈尔滨康赛思医药科技开发有限公司哈尔滨150001

目的观察双清合剂治疗卫气同病证流行性感冒的有效性及安全性。方法采用多中心、随机、双盲、双模拟平行对照、非劣效性试验设计,将2.0例卫气同病证流行性感冒患者采用分层区组随机化方法,使用SAS软件按1:1随机分为试验组和对照组,每组... 详细信息

目的观察双清合剂治疗卫气同病证流行性感冒的有效性及安全性。方法采用多中心、随机、双盲、双模拟平行对照、非劣效性试验设计,将2.0例卫气同病证流行性感冒患者采用分层区组随机化方法,使用SAS软件按1:1随机分为试验组和对照组,每组12.例。试验组服用双清合剂和磷酸奥司他韦胶囊模拟剂,对照组服用磷酸奥司他韦胶囊和双清合剂模拟剂,两组疗程均为5日。分别于治疗前、治疗3日、治疗5日时进行访视,评价其主要临床症状缓解时间、完全退热时间、退热起效时间、对乙酰氨基酚使用量、中医证候积分、中医证候疗效、重要临床症状缓解时间、重症/危重流感发生率及安全性。结果试验期间,共脱落/剔除16例(试验组8例、对照组8例),最终纳入符合方案集2.4例,其中试验组112.,对照组112.。与对照组比较,试验组可缩短头痛缓解时间[2..00(17.75,42.99)h vs.41.00(18.75,59.00)h]、减少肌肉或关节酸痛缓解时间[37.83(12.88,52.77)h vs.38.07(13.50,69.2.)h](P0.05)。两组患者不良反应发生率,试验组为4.17%和对照组为1.67%,差异无统计学意义(χ^(2.=1.36,P>0.05)。结论双清合剂可有效缓解卫气同病证流行性感冒的头痛、肌肉或关节酸痛症状,效果优于磷酸奥司他韦胶囊;在改善发热、咳嗽、汗出、面赤、咳黄痰临床症状,减少对乙酰氨基酚使用量,降低中医证候积分方面与磷酸奥司他韦胶囊疗效相当;安全性与磷酸奥司他韦胶囊相当。(中国临床试验注册中心注册***2.00087831)。

关键词：流行性感冒卫气同病双清合剂随机对照试验中西医结合

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取向碳纤维/橡胶导热复合材料的研究进展

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橡胶科技 2023年第12期21卷 577-581页

作者：王大林缪小冬杨宝岭杨建张继阳北京航天自动控制研究所北京100854 北京新橡高分子材料有限公司北京101500

介绍不同方法制备取向碳纤维增强导热复合材料的特点和进展,并对取向碳纤维/橡胶导热复合材料的发展方向进行展望。目前制备高导热取向碳纤维增强复合材料的方法主要包括冰模板取向法、外场辅助取向法和剪切力取向法等。每种方法均具有... 详细信息

介绍不同方法制备取向碳纤维增强导热复合材料的特点和进展,并对取向碳纤维/橡胶导热复合材料的发展方向进行展望。目前制备高导热取向碳纤维增强复合材料的方法主要包括冰模板取向法、外场辅助取向法和剪切力取向法等。每种方法均具有自身的特点和优势,可以根据具体需求选择合适的方法来实现碳纤维的取向。调控碳纤维沿特定方向取向排列的橡胶复合材料能够充分利用碳纤维在轴向上的高导热特性,显著提高材料在取向方向上的热导率。这种具有高导热各向异性的碳纤维/橡胶复合材料在热界面材料领域有着广阔的应用前景。

关键词：碳纤维橡胶复合材料取向导热性能

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网络功能虚拟化技术研究进展

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计算机学报 2019年第2期42卷 415-436页

作者：王进文张晓丽李琦吴建平江勇清华大学清华-伯克利深圳学院广东深圳518055 清华大学网络科学与网络空间研究院北京100084 清华大学深圳研究生院广东深圳518055 清华大学计算机科学与技术系北京100084

企业通常部署各种网络功能设备来实现企业网络所需的网络功能.例如,防火墙和入侵检测系统可以加强企业网络的安全性;缓存代理和广域网优化器可以提升企业网络的性能.然而,企业部署、更新和维护网络功能设备需要大量开销.不同网络功能设... 详细信息

企业通常部署各种网络功能设备来实现企业网络所需的网络功能.例如,防火墙和入侵检测系统可以加强企业网络的安全性;缓存代理和广域网优化器可以提升企业网络的性能.然而,企业部署、更新和维护网络功能设备需要大量开销.不同网络功能设备之间的差异使得企业需要庞大的专业团队来管理网络设备.物理设备固定的位置和处理能力使得企业网络无法有效解决网络拥塞带来的设备失效问题.随着企业网络规模的增长,网络功能设备管理、维护和更新产生的开销急剧上升.面对日益增长的网络功能设备运维开销和管理难度,网络功能虚拟化(Network Function Virtualization,NFV)技术提出将网络功能和物理硬件设备解耦,通过在通用商用服务器上部署和管理网络功能,为企业降低了网络设备管理难度,减少了网络功能设备开销,提供了灵活的网络服务部署策略,例如,动态回收/扩展.尽管NFV技术能为企业带来便捷和利益,但是实现一个实用而高效的NFV系统存在很多挑战.针对NFV系统实现中存在的问题和挑战,学术界和工业界已投入大量精力对NFV技术进行研究和尝试.该文首先介绍欧洲电信标准协会制定的NFV技术标准结构,并根据其分类总结NFV系统实现中存在的问题和挑战,将当前研究成果分为网络功能虚拟化、网络功能虚拟化设施和管理、网络编排三个部分.软件定义网络(Software Defined Network,SDN)和NFV技术可以相互弥补促进,该文对其之间的关系进行了研究.然后,该文着重从虚拟化网络功能(Virtual Network Function,VNF)构建及运行环境优化、NFV管理系统设计及优化、策略实施与验证、资源分配和迁移策略、NFV负载均衡和状态管理技术、NFV架构中的安全问题几个方面来深入分析NFV技术当前的学术研究成果.最后介绍了NFV技术在云计算、移动通讯以及家庭网络中的应用场景实例,同时对NFV技术进行总结并展望未来研究发展方向.

关键词：网络功能虚拟化技术网络功能虚拟化云计算网络安全

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FP-1装置铝套筒内爆动力学过程的一维磁流体力学模拟

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物理学报 2018年第8期67卷 46-56页

作者：张扬戴自换孙奇志章征伟孙海权王裴丁宁薛创王冠琼沈智军李肖王建国北京应用物理与计算数学研究所北京100088 中国工程物理研究院流体物理研究所绵阳621900 中国工程物理研究院研究生院北京100088

作为一种重要的柱面会聚冲击和准等熵压缩加载源,磁驱动固体套筒内爆技术已广泛应用于高能量密度物理实验研究.针对FP-1装置驱动的固体套筒内爆动力学过程,建立了含强度的一维磁流体力学模型,并对典型实验进行了模拟.计算获得的套筒内... 详细信息

作为一种重要的柱面会聚冲击和准等熵压缩加载源,磁驱动固体套筒内爆技术已广泛应用于高能量密度物理实验研究.针对FP-1装置驱动的固体套筒内爆动力学过程,建立了含强度的一维磁流体力学模型,并对典型实验进行了模拟.计算获得的套筒内爆速度同实验结果较为相符.模拟结果显示,该装置在40 kV充压条件下,可以将直径3 cm,厚0.5 mm的铝套筒加速至1.1 km/s,内壁速度超过1.5 km/s,同时保持大部分材料为固体状态.内爆套筒与相同材料靶筒碰撞产生的冲击压力约9 GPa.改变靶筒内部填充气体的压力,可以获得不同的靶筒运动速度、轨迹以及反弹半径,以满足不同类型实验的研究需要.

关键词：固体套筒磁流体力学模拟 FP-1装置高能量密度物理

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