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对宫颈癌手术治疗保留生育功能的研究进展

中国社区医师 2014年第7期30卷 8-9页

作者：闫蓓蓓河南辉县市人民医院

目的:宫颈癌作为常见的影响女性生殖道的恶性肿瘤,严重威胁着女性的健康与生命。本文将从保留生育功能的根治性宫颈切除术(RT)相关文献进行回顾性分析,并从可应用的有效治疗方法上进行对比,以评估术后的肿瘤结局及妊娠结局。

关键词：宫颈肿瘤保留生育功能治疗根治性宫颈切除锥切术单纯性宫颈切除术

抗生素在妇产科重症感染治疗中的选择与应用研究

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中国社区医师 2014年第3期30卷 5-5页

作者：闫蓓蓓河南辉县市人民医院

目的:妇产科重症感染多源自盆腔脓肿或盆腔腹膜炎,以需氧菌、厌氧菌的混合感染为主,病情严重者将导致患者脱水、高热、中毒性休克,对患者的多器官造成功能障碍,甚至危及生命。为此,加强对妇产科重症感染致病菌的临床分析,选择正确的抗生... 详细信息

目的:妇产科重症感染多源自盆腔脓肿或盆腔腹膜炎,以需氧菌、厌氧菌的混合感染为主,病情严重者将导致患者脱水、高热、中毒性休克,对患者的多器官造成功能障碍,甚至危及生命。为此,加强对妇产科重症感染致病菌的临床分析,选择正确的抗生素,尤其是加强对耐药菌株抗生素的应用就显得颇为关键。

关键词：妇产科重症感染多器官功能障碍综合征抗生素临床应用

Large eddy simulation study of 3D wind field in a complex mountainous area under different boundary conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第7期25卷 541-556页

作者： yan LI Lei yan Xuhui HE School of Civil Engineering Central South UniversityChangsha410075China National Engineering Research Center for High-speed Railway Construction Changsha410075China Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structures Changsha410075China

Large eddy simulations generally are used to predict 3D wind field characteristics in complex mountainous *** simulation boundary conditions,such as the height and length of the computational domain or the characteristics of inflow turbulence,can significantly impact the quality of *** this study,we examined these boundary conditions within the context of the mountainous terrain around a long-span cable-stayed bridge using a wind tunnel *** sizes of computational domains and turbulent incoming wind velocities were used in large eddy *** results show that when the height of the computational domain is five times greater than the height of the terrain model,there is minimal influence from the top wall on the wind field characteristics in this complex mountainous *** the length of the wake region of the computational domain has negligible effects on the wind *** in the inlet boundary reduces the length of the wake region on a leeward hill with a low slope,but has less impact on the mean wind velocity of steep hills.

关键词： Large eddy simulation(LES) Spectral representation method Recycling method High mountainous canyon Wind characteristics Atmospheric boundary layer Computational domain

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生物油常减压蒸馏流程模拟及实验研究

天津大学学报（自然科学与工程技术版） 2015年第1期48卷 13-18页

作者：马文超李美惠颜蓓蓓陈慧陈冠益天津大学环境科学与工程学院天津300072 天津理工大学化学化工学院天津300384

生物质经快速热解制备的生物油是一种清洁的可再生能源产品.为此,利用气相色谱质谱联用仪分析了生物油的组分性质,采用填料式精馏塔对生物油进行实沸点(true boiling point,TBP)蒸馏实验,实验分别在常压环境(0.1,MPa)及减压环境(0.01,M... 详细信息

生物质经快速热解制备的生物油是一种清洁的可再生能源产品.为此,利用气相色谱质谱联用仪分析了生物油的组分性质,采用填料式精馏塔对生物油进行实沸点(true boiling point,TBP)蒸馏实验,实验分别在常压环境(0.1,MPa)及减压环境(0.01,MPa)下进行,得到了生物油的3个宽馏分.结果表明:在常压环境下,汽油馏分的收率为19.2%,柴油馏分的收率为26.4%;在减压环境下,汽油馏分收率为30.5%,柴油馏分收率为23.3%.在实验的基础上,本文利用Aspen Plus软件建立了生物油实沸点蒸馏的模拟流程,并计算得到了生物油的恩氏蒸馏曲线.

关键词：生物油流程模拟常减压蒸馏 Aspen Plus

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生物质气化燃气无焰燃烧的实验研究

燃烧科学与技术 2020年第3期26卷 226-230页

作者：周生权李远博陈冠益颜蓓蓓天津大学环境科学与工程学院天津300350 温州科技职业学院温州325006

在自行设计的无焰燃烧系统中探究了生物质气化燃气无焰燃烧的温度场、污染物排放等特性,研究预热温度(950 K、1 000 K、1 050 K、1 100 K)、当量比(0.45、0.60、0.75、0.90)、不可燃成分组成(BGG1~4)对燃烧特性的影响,并找到最优运行参... 详细信息

在自行设计的无焰燃烧系统中探究了生物质气化燃气无焰燃烧的温度场、污染物排放等特性,研究预热温度(950 K、1 000 K、1 050 K、1 100 K)、当量比(0.45、0.60、0.75、0.90)、不可燃成分组成(BGG1~4)对燃烧特性的影响,并找到最优运行参数.结果表明,生物质气化燃气无焰燃烧时具有传统燃料类似的均匀温度场和低污染排放,但是整体温度更低,污染物排放更低.预热温度、不可燃成分、当量比等因素由高到低影响燃烧的热效应.最优的运行参数为:预热温度1 100 K,当量比0.9;不可燃成分组成BGG1为60%N2+5%CO2.

关键词：无焰燃烧生物质气化燃气温度场污染物排放

社会经济地位差异与农业绿色防控技术扩散倒U型关系:社会学习的中介效应

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干旱区资源与环境 2021年第8期35卷 18-25页

作者：赵佩佩闫贝贝刘天军西北农林科技大学经济管理学院/西部农村发展研究中心杨凌712100

基于创新扩散理论,采用833个苹果种植户调研数据,运用二元Probit模型和中介模型考察农户间社会经济地位差异对农业绿色防控技术扩散的直接影响以及社会学习的中介效应。结果表明:1)联系农户(直接获得政府农业技术推广服务的农户)与普通... 详细信息

基于创新扩散理论,采用833个苹果种植户调研数据,运用二元Probit模型和中介模型考察农户间社会经济地位差异对农业绿色防控技术扩散的直接影响以及社会学习的中介效应。结果表明:1)联系农户(直接获得政府农业技术推广服务的农户)与普通农户(未直接获得政府农业技术推广服务的农户)的社会经济地位差异与农业绿色防控技术扩散为倒U型关系。2)社会学习在社会经济地位差异影响农业绿色防控技术扩散过程中发挥中介效应,社会经济地位差异与社会学习之间呈倒U型,社会学习促进农业绿色防控技术扩散。3)受教育水平和社会网络规模正向影响农业绿色防控技术扩散。

关键词：农业技术扩散绿色防控技术社会经济地位差异社会学习

Electromagnetic characteristic analysis and design of a linear motor used for ultra-high-speed EMS maglev train

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Science China(Technological Sciences) 2024年第6期67卷 1957-1973页

作者： GAO Han SHI TingNa GAO XinMai LEI yanXiao yan Dong GUO Liyan yan yan College of Electrical Engineering Zhejiang UniversityHangzhou310027China Zhejiang University Advanced Electrical Equipment Innovation Center Hangzhou311107China State Key Laboratory of High-speed Maglev Transportation Technology Qingdao266100China CRRC Qingdao Sifang Co.Ltd. Qingdao266111China

The operating speed of the commercial electromagnetic suspension(EMS)maglev train has been over 430 km/h,making it the fastest means of land *** the increasing demands of people traveling,it is necessary to further improve the operating speed of maglev *** to examine whether the existing EMS system can meet the requirements of ultra-highspeed operation(more than 600 km/h),the electromagnetic characteristics of an EMS linear motor under the operating speed of 600–1000 km/h fed by a square-wave voltage supply is investigated in this ***,an electromagnetic field model of the EMS system under the square-wave voltage supply is established to investigate its electromagnetic performance,e.g.,the characteristics of phase current,the magnetic flux density,and the electromagnetic ***,the relationship between the harmonic components of the air-gap magnetic flux density and electromagnetic force is investigated using the two-dimensional fast Fourier transform(2D-FFT)to reveal the mechanism of electromagnetic force ***,to address the issues of excessive armature current density and significant electromagnetic force ripple,the linear motor is re-designed by enlarging the stator slot area and reshaping the mover's main magnetic ***,the Taguchi method is used to further improve the electromagnetic characteristics of the linear electric ***,the effectiveness of the proposed optimal design is validated by the finite-element analysis(FEA)based co-simulation.

关键词： ultra-high-speed maglev transportation electromagnetic suspension(EMS) linear motor electromagnetic force ripple suppression

Research on Modeling and Parameter Identification of Comprehensive Load Model of Distribution Network in Industrial Park

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Chinese Journal of Electronics 2024年第1期33卷 264-273页

作者： Tingling WANG Xiaohe yan School of Electric Engineering North China University of Water Resources and Electric Power Wenzhou Polytechnic

With the rapid development of industrial parks, its load model research has become a hot spot. In order to study the load of power system in industrial park, based on the characteristics of the industrial park load, a comprehensive load admittance static model with full voltage range adaptability is considered, and a comprehensive load model of distribution network of the industrial park is established. A complete parameter identification of the model is carried out through chaos particle swarm optimization. The simulation results show that the model can effectively describe the load characteristics of the distribution network in industrial parks.

关键词： Chaos Adaptation models Analytical models Parameter estimation Induction motors Simulation Distribution networks

Thermal and mechanical behavior of casting copper alloy wheel during wheel and belt continuous casting process

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China Foundry 2024年第1期21卷 82-90页

作者： Kun Gao yan Peng School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

To investigate the thermal and mechanical behavior of casting wheel,a two-dimensional thermoelastic-plastic finite element model was used to predict the temperature,stress and distortion distribution of the casting wheel during the wheel and belt continuous casting *** effects of grinding thickness and casting speed on the thermal and mechanical behaviors of the center of the hot face of the casting wheel were discussed in *** each rotation,the casting wheel passes through four different spray *** results show that the temperature distribution of the casting wheel in different spray zones is similar,the temperature of the hot face is the highest and the temperature reaches the peak in the spray zoneⅢ.The stress and distortion depend on the temperature distribution,and the maximum stress and distortion of the hot face are 358.2 MPa and 1.82 mm,*** temperature at the center of the hot face decreases with increasing grinding thickness and increases with increasing casting speed.

关键词： casting wheel finite element model grinding thickness casting speed hot face spray zones