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Risk factors for falls among children aged 0-18 years:a systematic review

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World Journal of Pediatrics 2022年第10期18卷 647-653页

作者： Lan Wang mao-Lin qian Xiao Shan Xiao-Qin Liu School of Medicine Nantong UniversityNo.19Qi Xiu StreetNantong226007China Department of Outpatient Affiliated Hospital of Nantong UniversityNo.20Xi Si StreetNantong226006China

Background Accidental falls are the most common cause of injury in *** falls not only result in pain and injury to children but also can pose a significant financial burden to their families and *** aim of this study is to identify risk factors for falls in *** We conducted a systematic review of the literature describing falls in children aged 0–18 *** of falls from a height of 1 m or more were excluded from the *** analyzed the included studies to identify risk factors for *** A total of 1496 articles were initially retrieved,leading to an included set of nine articles,which were published from 1995 to *** factors related to fall injury in children aged 0–18 years included age,sex,extroversion,rural areas,history of falls,family factors,caregiver factors,medication use,intravenous therapy,tests requiring movement,disease factors and long hospital *** We identified 12 risk factors affecting falls in children,including individual characteristics and family and social factors.

关键词： Accidental falls Risk factors Systematic review

Fluid-melt Inclusions in Fluorite of the Huanggangliang Skarn Iron-Tin Deposit and Their Significance to Mineralization

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Acta Geologica Sinica(English Edition) 2001年第2期75卷 204-211页

作者： WANG Lijuan WANG Jingbin WANG Yuwang mao qian Institute of Geology and Geophysics Chinese Academy of SciencesA-11 Datun RoadBeijing 100101 Beijing Institute of Geology for Mineral Resources Beijing 100012

For the first time, fluid-melt inclusions are found in fluorite of the Huanggangliang skarn iron-tin deposit (HSID). The fluorite was formed in the main stage of mineralization, named the hydro-skarnization stage. The inclusions contain various components such as Fe, Mg and Cr from deep sources. The melts of primary inclusions are mainly Ca- and F-rich and those of secondary inclusions tend to become Si-rich. During this evolution process, the melts and iron daughter minerals decreased and even vanished. These facts reveal that the evolution of the primary mineralizing fluids and the differentiation of the fluids and melts are the main factors leading to the deposition of Fe, Sn and other elements. This discovery confirms the magmatic genesis of the HSID and has filled in the gaps in the research of magmatogenic skarn deposits and furnished new methods for such research. Furthermore, it has enlarged the scope of the research on fluid inclusions.

关键词： skarn deposit fluorite fluid-melt inclusion daughter mineral melt composition

Li_(2)ZnTi_(3)O_(8)as the host–separator modifier with efficient polysulfides trapping and fast Li^(+)diffusion for lithium-sulfur batteries

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Nano Research 2024年第7期17卷 6087-6094页

作者： mao qian Yakun Tang Lang Liu Yue Zhang Xiaohui Li JiaJia Chen State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Xinjiang UniversityUrumqi 830017China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China

The diffusion and loss of lithium polysulfides(LiPSs)in lithium-sulfur batteries(LSBs)reduce the sulfur utilization rate and the catalytic conversion efficiency of sulfur species,resulting in early battery ***_(2)ZnTi_(3)O_(8)(LZTO),characterized by its stable spinel structure,exhibits high Li+conductivity and holds great potential as an effective adsorbent for *** study proposes a collaborative design concept of LZTO host–separator modifier,which offers a complementary and matching approach in the cathode side,effectively addressing the challenges associated with dissolution and inadequate conversion of *** functional theory(DFT)calculation substantiates the pronounced chemical affinity of LZTO towards *** importantly,the high efficiency ion transport channels are achieved in separator coating due to the presence of the LZTO ***,the catalytic efficacy of LZTO is validated through meticulous analysis of symmetric batteries and Tafel ***,the LZTO host–separator modifier-based cell displays satisfactory rate capability(1449 and 1166 mAh·g^(−1)at 0.1 and 0.5 C)and an impressively capacity(606 mAh·g^(−1)after 500 cycles at 1 C).The coordinated strategy of host–separator modifier is supposed to have wide applications in LSBs.

关键词： Li_(2)ZnTi_(3)O_(8) lithium-sulfur batteries host-separator modifier catalytic conversion diffusion and loss of LiPSs

Cobalt-doped TiO_(2)@C hierarchical nanocomposites derived from Ti_(3)C_(2) MXene as cathodes for hybrid magnesium-lithium batteries

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Nano Research 2024年第1期17卷 253-261页

作者： Xiaohui Li Yakun Tang Lang Liu Yue Zhang Yang Gao mao qian Wenjie Ma State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China

TiO_(2)has been explored in hybrid magnesium-lithium batteries(HMLBs)due to the advantages of low self-discharge and small volume expansion during ion ***,how to improve the inherently low ionic and electrical conductivity of TiO_(2)is the problem that needs to be *** this work,a smart strategy is adopted to prepare cobalt-doped TiO_(2)@C(Co^(4+)-TiO_(2)@C)hierarchical nanocomposite derived from Co(II)(OH)n@*** with TiO_(2)@C(without cobalt doping),Co^(4+)-TiO_(2)@C shows the highest specific capacity(154.7 mAh·g^(-1)at 0.1 A·g^(-1)after 200 cycles)and extraordinary rate performance in *** excellent electrochemical performance of Co4+-TiO_(2)@C is ascribed to the synergistic effect of the hierarchical structure and *** experimental results and density functional theory(DFT)calculation reveal that the cobalt-doping has effectively improved the electronic conductivity and reduced the Li+migration *** work provides a new insight to design TiO_(2)-based cathode materials with high-performance in HMLBs.

关键词： Ti_(3)C_(2)MXene TiO_(2) hybrid magnesium-lithium batteries hierarchical structure cobalt-doping

The Evolution Trend of Optical Core Network

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China Communications 2008年第1期5卷 4-8页

作者： mao qian Wuhan Research Institute of Posts and Telecommunications,Hubei, Wuhan, 430074 China Wuhan Research Institute of Posts and Telecommunications Hubei Wuhan 430074 China

Optical network is the infrastructure of telecommunicationnetwork. More than 95% of information istransported over optical network in China, wherecore network is the main trunk. How to increase thebit rate of the single wavelength channel, raise thetotal capacity of the DWDM system, extend theoptical transportation distance of electrical repeaterfree of the DWDM system and optical network intelligenceare key problems demanding high *** evolution trend of the optical core network isdescribed with some examples in this paper.

关键词： optical core network DWDM UHS ULC ULH ASON

Hisingerite in Trachydacite from Tarim:Implications for Voluminous Felsic Rocks in Transitional Large Igneous Province

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Journal of Earth Science 2020年第5期31卷 875-883页

作者： Mingde Lang Zhiguo Cheng Zhaochong Zhang Fangyue Wang qian mao M.Santosh State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Ore Deposit and Exploration Centre(ODEC) Hefei University of TechnologyHefei 230009China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Department of Earth Sciences University of AdelaideSA 5005Australia

Unlike the typical large igneous provinces(LIPs) that are dominated by mafic-ultramafic rocks, the Tarim large igneous province(TLIP) is characterized by a high proportion of felsic rocks, based on which the TLIP is classified as a transitional LIP. In this study, we focus on the trachydacite from the TLIP in which we report the characteristics of hisingerite employing a variety of techniques such as EMPA, LA-ICPMS, CCD single crystal diffraction, and bulk-rock oxygen isotopes. The hisingerite in this rock is associated with plagioclase, amphibole, apatite and ilmenite. These minerals occur as aggregates of fine curled fibers in micron-scale and display heavy rare earth elements(HREE) enriched signature with significant negative Eu anomalies. In the primitive mantle-normalized trace element spider diagrams, they show pronounced Th and U spikes and Nb, Zr, Hf troughs. Petrological observation and mineralogical study reveal a closely genetic relationship between hisingerite and amphibole, indicating that the hisingerite might have been derived from the breakdown of amphibole during the magma ascent. The formation of hisingerite requires excess water from the surrounding melts, suggesting a hydrous parental magma. The hisingerite and amphibole assign a hydrous crustal source for the rock, and extensive crustal melting accounts for the voluminous felsic rocks in the TLIP.

关键词： hisingerite amphibole trachydacite hydrous crust Tarim large igneous province

Research of Li4SiO4 irradiation tritium production device

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Nuclear Science and Techniques 2013年第B12期24卷 83-87页

作者： ZHANG Zhihua MI Xiangmiao YE mao qian Dazhi LI Rundong FENG Qijie Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang 621900 China

Tritium self-sustain and circulation is the core problem to use fusion energy peacefully. As the core component of the breeder in-pile irradiation test, the irradiation tritium production device provides irradiation space for breeders' tritium production and release. We take the Li4SiO4 as the research object and design the structure of the irradiation device. We complete the physical parameters computation, the irradiation device safety analysis and the flow field analysis of the breeder refueling, realizing the adjusting of the breeder irradiation temperature and the tritium release temperature window and making the control of gas operational parameters come true. The data could provide reference for breeders' in-pile irradiation research.

关键词：照射生产设备硅酸锂氚生产装置温度调节科研育种饲养员

Tetra-armed conjugated microporous polymers for gas adsorption and photocatalytic hydrogen evolution

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Science China Chemistry 2017年第8期60卷 1075-1083页

作者： Yunfeng Xu Chong Zhang Pan Mu Na mao Xue Wang qian He Feng Wang Jia-Xing Jiang Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of Technology Wuhan 430073 China

Two novel tetra-armed conjugated microporous polymers with different geometries have been designed and synthesized via Suzuki-Miyaura cross coupling polycondensation. Both polymers are stable in various organic solvents tested and are thermally stable. The pyrene-containing polymer of PrPy with the rigid pyrene unit shows a higher Brunauer-Emmet-Teller specific surface area of 1219m2g-1 than the tetraphenylethylene-containing polymer of PrTPE （770m2g 1）, which leads to a high CO2 uptake ability of 3.89mmolg I at 1.13bar/273K and a H2 uptake ability of 1.69wt% at 1.13bar/77K. The photocatalytic hydrogen production experiments revealed that PrPy also shows a better photocatalytic performance than PrTPE due to the higher conjugation degree and planar structure, the broader UV-visible （UV-Vis） absorption, the lower photoluminescence lifetime, and the higher specific surface area.

关键词： perylene conjugated mieroporous polymers gas adsorption hydrogen evolution

A study of the strong pulses detected from PSR B0656+14 using the Urumqi 25-m radio telescope at 1540 MHz

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关键词： stars:neutron-pulsars-pulsars:individual(B0656+14)Options: Encrypt Page Allow Cookies Remove Scripts Remove Objects 收藏本站首页期刊全文库学位论文库会议论文库学术百科吾喜杂志工具书优先出版注册|登录|我的账户基础科学|工程科技I辑|工程科技II辑|医药卫生科技|信息科技|农业科技|哲学与人文科学|社会科学I辑|社会科学II辑|经济管理高级搜索: 用" stars neutron-pulsars—pulsars "到知网平台检索,点击这里搜索更多...《Research in Astronomy and Astrophysics》 2012年12期加入收藏获取最新 A study of the strong pulses detected from PSR B0656+14 using the Urumqi 25-m radio telescope at 1540 MHzAli Esamdin 【摘要】: We report on the properties of strong pulses from PSR B0656+14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010.In 44 h of observational data,a total of 67 pulses with signal-to-noise ratios above a 5σthreshold were detected.The peak flux densities of these pulses are 58 to 194 times that of the average profile,and their pulse energies are 3 to 68 times that of the average pulse.These pulses are clustered around phases about 5-ahead of the peak of the average profile.Compared with the width of the average profile,they are relatively narrow,with the full widths at half-maximum ranging from 0.28 ° to 1.78 °.The distribution of pulse-energies follows a lognormal distribution.These sporadic strong pulses detected from PSR B0656+14 have different characteristics from both typical giant pulses and its regular pulses.【作者单位】 : Xinjiang

Research in Astronomy and Astrophysics 2012年第12期12卷 1649-1654页

作者： Guo-Cun Tao Ali Esamdin Hui-Dong Hu mao-Fei qian Jing Li Na Wang Xinjiang Astronomical Observatory Chinese Academy of Sciences Urumqi 830011 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

We report on the properties of strong pulses from PSR B0656＋14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September *** 44 h of observational data,a total of 67 pulses with signal-to-noise ratios above a 5σthreshold were *** peak flux densities of these pulses are 58 to 194 times that of the average profile,and their pulse energies are 3 to 68 times that of the average *** pulses are clustered around phases about 5-ahead of the peak of the average *** with the width of the average profile,they are relatively narrow,with the full widths at half-maximum ranging from 0.28 ° to 1.78 °.The distribution of pulse-energies follows a lognormal *** sporadic strong pulses detected from PSR B0656＋14 have different characteristics from both typical giant pulses and its regular pulses.