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A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber,Green Shielding and Sensor

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Nano-Micro Letters 2021年第2期13卷 112-123页

作者： Min Zhang Chen Han wen-Qiang Cao Mao-Sheng Cao Hui-Jing Yang jie Yuan School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Department of Physics Tangshan Normal UniversityTangshan 063000People’s Republic of China School of Information Engineering Minzu University of ChinaBeijing 100081People’s Republic of China

It is extremely unattainable for a material to simultaneously obtain efficient electromagnetic(EM)absorption and green shielding performance,which has not been reported due to the competition between conduction loss and ***,by tailoring the internal structure through nano-micro engineering,a NiCo2O4 nanofiber with integrated EM absorbing and green shielding as well as strain sensing functions is *** the improvement of charge transport capability of the nanofiber,the performance can be converted from EM absorption to shielding,or even ***,as the conductivity rising,the reflection loss declines from −52.72 to −10.5 dB,while the EM interference shielding effectiveness increases to 13.4 dB,suggesting the coexistence of the two EM ***,based on the high EM absorption,a strain sensor is designed through the resonance coupling of the patterned NiCo2O4 *** strategies for tuning EM performance and constructing devices can be extended to other EM functional materials to promote the development of electromagnetic driven devices.

关键词： Electromagnetic absorber Electromagnetic shielding NiCo2O4 nanofiber Sensor

基于叙事表达工具系统的高校思政亲和力语言体系构建

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当代教研论丛 2024年第5期10卷 113-116页

作者：程振伟梁世界刘妃杭州电子科技大学浙江杭州310018

语言是内容与形式的融合体,通过对语言体系内容与形式的新型统一构建,可达到高内容生成、高目标达成的旨归。在高校大思政体系中,面对高校思政课语言表达与内容生成割裂、受众注意力匮乏、语言不接地气、目标达成困难等现实难题,文章探... 详细信息

语言是内容与形式的融合体,通过对语言体系内容与形式的新型统一构建,可达到高内容生成、高目标达成的旨归。在高校大思政体系中,面对高校思政课语言表达与内容生成割裂、受众注意力匮乏、语言不接地气、目标达成困难等现实难题,文章探索新型叙事表达工具系统赋能高校思政,通过活用善用新型概念工具,构建吸引力更足、针对性更强、表达效率更高、目标达成性更好、更为新鲜活泼的思政亲和力语言体系。

关键词：思政语言亲和力叙事表达工具

Preparation of Polystyrene/Triphenyl Phosphate Composites by Suspension Polymerization and Melt Extrusion Method A Comparative Study

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Chinese Journal of Polymer Science 2016年第6期34卷 688-696页

作者： Cun-wei Zhang Rong-jie Yang 李向梅 De-qi Yi National Engineering Research Center of Flame Retardant Materials School of Materials Beijmg Institute of Technology Beijing 100081 China Fire Command Department Chinese People's Armed Police Forces Academy Langfang 065000 China

Polystyrene （PS）/triphenyl phosphate （TPP） composites were prepared by both suspension polymerization and melt extrusion, and a comparative study of the flame retardance and mechanical properties was carried out. The results showed that suspension polymerization was a better technique than melt extrusion for obtaining good dispersity of the PS/TPP composite. The TPP nanoparticles, which were approximately 50 nm in size, were homogenously and uniformly dispersed in the PS matrix by suspension polymerization in one-step. However, the PS/TPP composite was partially agglomerated, exhibiting irregularly shaped micron-scale particles as a result of melt extrusion. In contrast to the melt extrusion, the limited oxygen index （LOI） of the PS/TPP nanocomposite by suspension polymerization increased to 22.6% from 21.8%, and time to ignition （TTI） increased by 12.3%, the peak heat release rate （PHRR） decreased by 8.5%, and the total heat release （THR） decreased by 11.0%. The mechanical properties of the PS/TPP nanocomposite by suspension polymerization also increased. The tensile strength, elongation at break, and flexural strength increased by 36.4%, 8.5%, and 108%, respectively.

关键词： Polystyrene Triphenyl phosphate Flame retardance Suspension polymerization Melt extrusion.

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绵羊肺炎支原体研究进展

草食家畜 2024年第1期 19-24页

作者：魏婕张妤米晓云魏玉荣郑文新新疆动物疫病研究重点实验室/新疆畜牧科学院兽医研究所乌鲁木齐830013 新疆畜牧科学院乌鲁木齐830011

【现状】绵羊肺炎支原体(Mycoplasma ovipneumoniae)是引起绵羊和山羊呼吸系统疾病的主要病原之一,病羊以咳嗽、气喘、流鼻液、消瘦等为主要临床症状。【问题】由于该病原具有广泛的寄主范围,病程长,体外培养困难,对抗菌药物的敏感性难... 详细信息

【现状】绵羊肺炎支原体(Mycoplasma ovipneumoniae)是引起绵羊和山羊呼吸系统疾病的主要病原之一,病羊以咳嗽、气喘、流鼻液、消瘦等为主要临床症状。【问题】由于该病原具有广泛的寄主范围,病程长,体外培养困难,对抗菌药物的敏感性难以测定,致使临床选药困难,用药依从性差。因此,目前该病防控缺乏便捷且行之有效的措施,具有较高的病死率,一旦发病对羊产业造成巨大经济损失。【对策】目前有效防控措施为疫苗免疫,但缺乏针对性强的商业化市售疫苗。根据目前抗病育种研究,可以针对绵羊肺炎支原体培育新抗病绵羊品种。【结论】疫苗防控是快速有效的防控措施之一,但由于流行病原无交叉保护性,且成本较高,无法满足新疆羊产业发展需要,因此,培育抗绵羊肺炎支原体的绵羊新品种十分必要且意义深远。

关键词：绵羊肺炎支原体流行病学毒力抗病育种

维普期刊数据库博看期刊

A modeling study of aerosol effects on cloud radiative property and precipitation

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Chinese Science Bulletin 2010年第15期55卷 1554-1559页

作者： FANG wen ZHENG GuoGuang WANG wei-Chyung Chinese Academy of Meteorological Sciences Beijing 100081 China Atmospheric Sciences Research Center State University of New York Albany NY 12203 USA

A two-moment (mass and number) warm cloud scheme together with ground and aircraft measurements over Beijing is used in a regional model to study the effects of aerosols on cloud radiative property and *** a prescribed tri-modal lognormal aerosol size distribution,the aerosol numbers are calculated from prognostic aerosol masses,for which advection,diffusion,and cloud drop activation/deactivation are ***,the accumulation mode of a tri-lognormal aerosol size distribution is fitted to the aircraft measured values for a cold front case passed through northern China during June 25-26,*** the simulations,the warm cloud scheme simulates explicitly the cloud drops and subsequently affects the radiative heating and cooling,and *** with different initial conditions for being fitted with aircraft measurements,continental and maritime aerosol numbers were *** is found that more aerosols result in more but smaller cloud drops and more cloud water,leading to an increase in *** effects on rains are complex:smaller cloud drops have less efficient coagulation for raindrop to form (autoconversion),leading to fewer raindrop numbers and less rainwater;while more cloud water enhances the accretion for raindrop ***,for the whole cloud system,the impact of increasing aerosols inhibits precipitation.

关键词：辐射效应气溶胶降水财产 Northern 对数正态分布建模地面测量

“产学互融，‘双创’增效”校企协同育人模式研究

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创新创业理论研究与实践 2024年第12期7卷 105-107页

作者：黄頔魏梅芳揭慧萍长沙电力职业技术学院

经济的高速增长和产业结构的不断优化，对高等职业教育提出了新的更高要求，特别是对校企合作育人模式的实效性和创新性有了更高的要求。高等职业教育需要更好地适应经济社会发展的需求，促进学生的全面发展，培养应用型、创新型人才。... 详细信息

经济的高速增长和产业结构的不断优化，对高等职业教育提出了新的更高要求，特别是对校企合作育人模式的实效性和创新性有了更高的要求。高等职业教育需要更好地适应经济社会发展的需求，促进学生的全面发展，培养应用型、创新型人才。该文通过强化校企协同机制、加强创新实践教学、构建3支团队、推进课程体系和教学改革，探索了校企深度融合的新路径，提出“产学互融，‘双创’增效”校企协同育人新模式，研究对于引导职业院校与企业深入合作、共同推进高质量职业教育发展具有重要的理论与实践意义。

关键词：产学互融校企合作人才培养协同育人创新实践职业教育

Interface control for pure ultraviolet electroluminescence from nano-ZnO-based heterojunction devices

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Science Bulletin 2018年第1期63卷 38-45页

作者： Daotong You Chunxiang Xu Feifei Qin Zhu Zhu A.Gowri Manohari wei Xu jie Zhao wei Liu State Key Laboratory of Bioelectronics School of Biological Science & Medical Engineering Southeast University

Realization of pure and stable ultraviolet electroluminescence(UV EL) of ZnO light-emitting diode(LED)is still a challenging issue, due to complicated defects of intrinsic ZnO and the corresponding device interfaces. In this paper, we demonstrated a simple & feasible method to fabricate n-ZnO/AlN/p-GaN heterojunctions light-emitting devices. First, the vertically aligned ZnO nanorods(NRs) have been prepared as high quality active layer, and the nanostructured heterojunction LED arrays were constructed by directly bonding ZnO NRs onto AlN-coated p-GaN wafer. By optimizing the AlN layer thickness to be 20 nm, a strong and pure ultraviolet emission located at 387 nm can be observed. The energy band alignment of n-ZnO/AlN(20 nm)/p-Ga N heterojunction LED has been studied by using X-ray photoelectron spectroscopy(XPS), the valence band offset between AlN and GaN was calculated to be 0.34 eV. On the other side, the conduction band offset(as large as 3.28 eV) between Al N and ZnO can block the flow of electrons from ZnO top-GaN. Thus, electron-hole recombination takes place in the ZnO layer, and a pure UV EL could be observed. Our results provide a significant approach toward future of pure ultraviolet optoelectronic LEDs.

关键词： ZnO nanorods AlN insulator layer Interface control Pure ultraviolet light emitting diode Directly bonding

严寒地区办公建筑外墙保温系统优化及碳减排分析

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辽宁工业大学学报（自然科学版） 2024年第1期44卷 27-37页

作者：骆艳杰赵薇王月王熙瑞辽宁工业大学土木建筑工程学院辽宁锦州121001

合理选择保温材料及厚度是实现低碳建筑的重要途径。以典型办公建筑为对象,选取严寒地区3个不同城市(漠河、哈尔滨、沈阳),模拟4种保温材料对建筑能耗的影响,结合生命周期评价与生命周期成本分析构建生态效率模型,核算建筑外保温系统的... 详细信息

合理选择保温材料及厚度是实现低碳建筑的重要途径。以典型办公建筑为对象,选取严寒地区3个不同城市(漠河、哈尔滨、沈阳),模拟4种保温材料对建筑能耗的影响,结合生命周期评价与生命周期成本分析构建生态效率模型,核算建筑外保温系统的全生命周期碳排放及经济成本,并识别出具有最优生态效率的建筑外保温系统。结果表明,严寒地区采用建筑外保温系统能够带来良好的建筑节能及碳减排效果,但生命周期碳排放与经济成本结果具有明显差异,城市地理位置和保温材料类型影响其厚度优化。从地理位置角度,低纬度城市沈阳的建筑外墙保温系统具有最低的碳排放和经济成本,高纬度城市反之;从碳排放和成本效果来看,聚氨酯板>挤塑聚苯板>岩棉板>模塑聚苯板;3个城市采用聚氨酯板,从生态效率来看65 mm>60 mm>50 mm,其生命周期碳排放为101.95~184 kgCO_(2)eq/(m2∙a),经济成本为8.24~15.17元/(m^(2)∙a)。

关键词：建筑外保温生命周期评价碳排放生态效率

Spin polarization and production rate studies of surface muons in a novel solenoid capture system based on CSNS

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Nuclear Science and Techniques 2017年第8期28卷 61-68页

作者： Ran Xiao Yan-Fen Liu Xiao-jie Ni Zi-wen Pan Bang-Jiao Ye State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Institute of High Energy Physics Chinese Academy ofSciences Beijing 100049 China

A novel surface muon capture system with a large acceptance was proposed based on the China spallation neutron source(CSNS).This system was designed using a superconducting solenoid where a long graphite target was put inside ***,the spin polarization evolution was studied in a constant uniform magnetic *** the magnetic field can interact with the spin of the surface muon,both the spin polarization and production rate of the surface muons collected by the new capture system were calculated by the *** results showed that the surface muons could still keep a high spin polarization([90%)with different magnetic fields(0–10 T),and the larger magnetic field is,the more surface muons can be ***,the proton phase space,Courant–Snyder parameters,and intensities of surface muons of different beam fractions were given with magnetic fields of 0 and *** solenoid capture system can focus proton and surface muon beams and collect p?and l?*** can also provide an intense energetic positron source.

关键词：自旋极化率采集系统 μ介子表面电磁生产均匀磁场自旋相互作用