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双针-板结构脉冲气泡放电等离子体固氮研究

原子与分子物理学报 2025年第6期42卷 122-128页

作者：赵少伟张丽方志南京工业大学电气工程与控制科学学院南京211816

大气压低温等离子体可以利用空气直接进行氧化固氮,具有反应条件温和、参数灵活可控、避免温室气体排放等优点.本文利用双针-板电极在水中形成气泡放电等离子体,以空气为放电气体进行了固氮研究,分析了产物浓度和固氮能耗的影响因素.研... 详细信息

大气压低温等离子体可以利用空气直接进行氧化固氮,具有反应条件温和、参数灵活可控、避免温室气体排放等优点.本文利用双针-板电极在水中形成气泡放电等离子体,以空气为放电气体进行了固氮研究,分析了产物浓度和固氮能耗的影响因素.研究结果表明,等离子体中含有丰富的氮原子、氧原子、氢原子、激发态氮分子等活性物种,可高效合成硝态含氮产物.研究发现,脉冲参数、电极间隙、工作气体组分对气泡放电等离子体的固氮性能有重要影响.装置最高NO~-_x合成速率为19.2μmol/min,最小能耗约为11 MJ/mol.此外还发现,电极间隙为6 mm时,固氮性能最优;空气中增加适量氧气(氧气/氮气比例为0.4)可以增强产物合成,降低能耗.

关键词：低温等离子体纳秒脉冲放电气液放电固氮

高效液相色谱法对肉鸡组织样品中黄曲霉毒素B1残留量的测定

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黑龙江畜牧兽医 2015年第10期 281-283,287页

作者：姚婉秦顺义王昕赵方红刘丽娜张兰秀天津农学院动物科学与动物医学学院天津300384 河北省盐山县畜牧水产局河北盐山061300

为了检测肉鸡组织中黄曲霉毒素B1（AFBl）的残留量，试验采用柱前衍生一高效液相色谱（HPLC）的分析方法，并周该方法对样品进行检测。结果表明：AFB1在0．5～50．0μg／L范围内具有良好的线性关系，相关系数大于0．999，检出限为0．1μ... 详细信息

为了检测肉鸡组织中黄曲霉毒素B1（AFBl）的残留量，试验采用柱前衍生一高效液相色谱（HPLC）的分析方法，并周该方法对样品进行检测。结果表明：AFB1在0．5～50．0μg／L范围内具有良好的线性关系，相关系数大于0．999，检出限为0．1μg/kg,信噪比（S／N）=3：1。在0．5μg／kg、1．0μg/kg、2．0μg／kg3个添加水平下肝脏组织平均回收率为91．0％-107．0％，肌肉组织平均回收率为94．0％-105．4％，相对标准偏差（RSD）分别为0．8％～1．7％、1．2％-2．O％。说明本方法具有灵敏性、准确性和可重复性，可对动物组织样中AFBl残留进行定性和定量检测。

关键词：肉鸡组织样品柱前衍生-高效液相色谱(HPLC) 黄曲霉毒素B1(AFB1) 检出限回收率

用于冷负荷占优型建筑的地源热泵复合系统模拟研究

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建筑技术开发 2016年第6期43卷 43-47页

作者：满意王泽江史盛钰杨洪兴方肇洪山东建筑大学热能工程学院可再生能源建筑利用技术教育部重点实验室山东济南250101 香港理工大学屋宇设备工程学系香港999077

近年来,地源热泵技术被广泛应用于各类建筑物的中央空调系统中。然而,当地源热泵系统在冷负荷占优型建筑中应用时,夏季向土壤中排热量与冬季从土壤中吸热量的不平衡将导致土壤中热量积累,最终使整个系统性能降低。有效解决方法之一是使... 详细信息

近年来,地源热泵技术被广泛应用于各类建筑物的中央空调系统中。然而,当地源热泵系统在冷负荷占优型建筑中应用时,夏季向土壤中排热量与冬季从土壤中吸热量的不平衡将导致土壤中热量积累,最终使整个系统性能降低。有效解决方法之一是使用地源热泵复合系统,在常规地源热泵的基础上耦合辅助散热装置如冷却塔,以排出积聚在土壤中的不平衡热量。然而,经济高效的地源热泵复合系统的设计方法和运行控制是非常复杂的。通过建立地源热泵复合系统的逐时模拟模型,对一个冷负荷占优型建筑提出不同地源热泵复合系统设计及运行方案。通过模拟和比较不同设计方案下的复合系统的逐时运行性能,确定出复合系统的优化设计和控制参数。研究结果表明,运行于冷负荷占优型建筑中的优化地源热泵复合系统可以有效解决土壤热量积累问题,在长期运行中可大幅降低空调系统的总投入。

关键词：地源热泵复合系统冷负荷占优型建筑模拟模型

Building a Holistic Taxonomy Model for OGD-Related Risks:Based on a Lifecycle Analysis

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Data Intelligence 2019年第4期1卷 309-332页

作者： fang Wang An zhao hong zhao Jun Chu Business School of Nankai University Tianjin 300071China Center for Network Society Governance of Nankai University Tianjin 300071China CETC Big Data Research Institute Co.Ltd. Guiyang 550081China

For many government departments,uncertainty aversion is a source of barriers in the advancement of data openness.A more active response to potential risks is needed and necessitates an in-depth examination of risks related to open government data(OGD).With a cross-case study in which three cases from the United Kingdom,the United States and China are examined,this study identifies potential risks that might emerge at different stages of the lifecycle of OGD programs and constructs a taxonomy model for *** taxonomy model distinguishes the“risks from OGD”from the“risks to OGD”,which can help government departments make better ***,risk response strategies are suggested based on the research results.

关键词： Open government data Risk Taxonomy Lifecycle Risk management

Dislocation stability in three-phase nanocomposites with imperfect interface

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Acta Mechanica Sinica 2014年第5期30卷 693-702页

作者： Ying-Xin zhao You-Wen Liu Qi-hong fang State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body/College of Mechanical and Vehicle Engineering Hunan University

Interface imperfection can significantly affect the mechanical properties and failure mechanisms as well as the strength and toughness of nanocomposites. The elastic behavior of a screw dislocation in nanoscale coating with imperfect interface is studied in the three-phase composite cylinder model. The interface between inner nanoin- homogeneity and intermediate coating is assumed as perfectly bonded. The bonding between intermediate coating and outer matrix is considered to be imperfect with the assumption that interface imperfection is uniform, and a linear spring model is adopted to describe the weakness of imperfect interface. The explicit expression for image force acting on dislocation is obtained by means of a complex variable method. The analytic results indicate that inner interface effect and outer interface imperfection, simultaneously taken into account, would influence greatly image force, equilibrium position and stability of dislocation, and various critical parameters that would change dislocation stability. The weaker interface is a very strong trap for glide dislocation and, thus, a more effective barrier for slip transmission.

关键词： Nanocomposites -Dislocation Imperfect inter- face - Interface effect Complex variable method

Efficient and Stable Photoassisted Lithium-Ion Battery Enabled by Photocathode with Synergistically Boosted Carriers Dynamics

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Ma, Zelin Wang, Shiyao Ma, Zhuangzhuang Li, Juan zhao, Luomeng Li, Zhihuan Wang, Shiyuan Shuang, Yazhou Wang, Jiulong Wang, fang Xia, Weiwei Jian, Jie He, Yibo Wang, Junjie Guo, Pengfei Wang, hongqiang Northwestern Polytech Univ Ctr Nano Energy Mat State Key Lab Solidificat Proc Sch Mat Sci & Engn Xian 710072 Peoples R China NPU Shaanxi Joint Lab Graphene Xian 710072 Peoples R China Northwestern Polytech Univ Sch Mat Sci State Key Lab Solidificat Proc Xian 710072 Peoples R China Northwestern Polytech Univ Engn Dept Xian 710072 Peoples R China Northwestern Polytech Univ Ctr Adv Lubricat & Seal Mat Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China Northwestern Polytech Univ Shenzhen Res & Dev Inst Shenzhen 518063 Peoples R China Shaanxi Normal Univ Key Lab Appl Surface & Colloid Chem Shaanxi Engn Lab Adv Energy Technol Shaanxi Key Lab Adv Energy DevicesSch Mat Sci & E Xian 710119 Peoples R China

Efficient and stable photocathodes with versatility are of significance in photoassisted lithium-ion batteries (PLIBs), while there is always a request on fast carrier transport in electrochemical active photocathodes. Present work proposes a general approach of creating bulk heterojunction to boost the carrier mobility of photocathodes by simply laser assisted embedding of plasmonic nanocrystals. When employed in PLIBs, it was found effective for synchronously enhanced photocharge separation and transport in light charging process. Additionally, experimental photon spectroscopy, finite difference time domain method simulation and theoretical analyses demonstrate that the improved carrier dynamics are driven by the plasmonic-induced hot electron injection from metal to TiO2, as well as the enhanced conductivity in TiO2 matrix due to the formation of oxygen vacancies after Schottky contact. Benefiting from these merits, several benchmark values in performance of TiO2-based photocathode applied in PLIBs are set, including the capacity of 276 mAh g(-1 ) at 0.2 A g(-1 )under illumination, photoconversion efficiency of 1.276% at 3 A g(-1 ), less capacity and Columbic efficiency loss even through 200 cycles. These results exemplify the potential of the bulk heterojunction strategy in developing highly efficient and stable photoassisted energy storage systems.

关键词： Photoassisted lithium-ion batteries Bulk heterojunction Carrier dynamics TiO2 nanofiber Plasmonic metal nanocrystals

Upconversion Luminescence of SrTiO3：Er^3＋ Ultrafine Powders Produced by 785 nm Laser

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Chinese Journal of Chemical Physics 2008年第3期21卷 233-238页

作者： Hai Guo Yan-min Qiao Ju-fang Zheng Lei-hong zhao Department of Physics Zhejiang Normal University Jinhua 321004 China Zhejiang Key Laboratory for Reactive Chemistry on 5olicl Surfaces Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 China

Er^3＋ doped SrTiO3 ultrafine powders were prepared by solid state reaction in a molten NaCl flux. The structural properties were characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The Stokes emission spectra of Er^3＋ in SrTiO3：Er^3＋ ranging from green to near infrared region were investigated under 514.5 nm laser excitation. The green and red upconverted luminescence spectra of Er^3＋ were measured under excitation into the 419/2 level by 785 nm laser. The upconversion mechanisms were studied in detail through laser power dependence and Er^3＋ ion concentration dependence of upconverted emissions, and results show that excited state absorption and energy transfer process are the possible mechanisms for the upconversion. The upconversion properties indicate that SrTiO3：Er^3＋ may be used in upconversion phosphors.

关键词： SrTiO3 Upconversion luminescence Excited state absorption Energy transfer

北京市2886名食品和公共场所从业人员基本医疗素养水平及其影响因素

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职业与健康 2017年第2期33卷 263-266页

作者：刘秀颖赵芳红范娜娜北京市疾病预防控制中心科研教学管理办公室北京100013 北京市疾病预防控制中心预防保健中心北京100013 首都医科大学卫生管理与教育学院北京100069

目的分析北京市食品和公共场所从业人员基本医疗素养水平现状并探讨其影响因素,为有针对性地开展健康教育和健康促进干预工作提供依据。方法采用《公共卫生从业相关素养调查问卷》及《2013年中国居民健康素养调查问卷》,对2 886名到北... 详细信息

目的分析北京市食品和公共场所从业人员基本医疗素养水平现状并探讨其影响因素,为有针对性地开展健康教育和健康促进干预工作提供依据。方法采用《公共卫生从业相关素养调查问卷》及《2013年中国居民健康素养调查问卷》,对2 886名到北京市疾病预防控制中心办理健康证的食品和公共场所从业人员进行问卷调查。用χ~2检验分析不同特征人群基本医疗素养水平,用logistic回归分析基本医疗素养的影响因素。结果北京市食品和公共场所从业人员具备基本医疗素养的比例为3.2%,在健康素养6类问题中水平最低。2型糖尿病患者对健康管理服务(11.3%)、肝脏相关知识(11.6%)、孕期检查次数(17.7%)、药品标签知识(24.3%)以及孕产妇保健卡的建立(25.0%)等知识的知晓率较低。单因素分析显示,基本医疗素养水平随着文化程度的升高而提高,职业对基本医疗素养水平具有一定的影响,上网方便的从业人员基本医疗素养水平较高;但未发现地域、性别、年龄、家庭人均月收入等因素对北京地区公共卫生从业人员基本医疗素养水平的作用。多因素logistic分析显示,在控制了其他因素后,文化程度和职业是北京地区公共卫生从业人员基本医疗素养的重要影响因素。结论北京市食品和公共场所从业人员基本医疗素养水平普遍较低,在今后工作中应加强相关知识和技能的培训和宣传教育,扩大信息获取渠道;针对重点人群和主要问题,采取适宜的、可及性强的干预和健康知识传播措施。

关键词：食品和公共场所从业人员基本医疗素养影响因素

Preparation and applications of calcium ferrite as a functional material:A review

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 292-310页

作者： Xiuli Han Bowen Duan Lei Liu Shilong fang Weiwei Wang College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources of Hebei Province Tangshan 063210China Key Laboratory of Mining Development and Security Technology of Hebei Province Tangshan 063210China

Calcium ferrite(CF)is recognized as a potential green and efficient functional material because of its advantages of magnetism,electrochemistry,catalysis,and biocompatibility in the fields of materials chemistry,environmental engineering,and ***-fore,the obtained research results need to be systematically summarized,and new perspectives on CF and its composite materials need to be *** on the presented studies of CF and its composite materials,the types and structures of the crystal are *** addition,the current application technologies and theoretical mechanisms with various properties in different fields are ***,the various preparation methods of CF and its composite materials are elaborated in *** importantly,the advantages and disadvantages of the synthesis methods of CF and its composite materials are discussed,and the existing problems and emerging challenges in practical production are ***,the key future research directions of CF and its composite materials have been prospected from the potential application technologies to provide references for its synthesis and efficient utilization.

关键词： calcium ferrite mineral functional materials preparation application perspectives