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2023 IEEE International Conference on Power Science and Technology, ICPST 2023

作者： Hao, Zhi he, Yadong Chen, Jun Luo, Shaowen Zhou, xuwen Lu, Baopeng State Grid Gansu Electric Power Company Dingxi Power Supply Company Dingxi China Lanzhou Jiaotong University School of New Energy and Power Engineering Lanzhou China

ISBN: (纸本)9798350311358

Lithium-ion batteries have become the first choice for electric vehicle power batteries and energy storage power plants due to their good output characteristics and high energy density. Taking the lithium battery as the research object, a battery monomer heat production model is established to explore the heat generation mechanism of the lithium-ion battery, and the simulation results show that the internal temperature field of lithium-ion battery is unevenly distributed, and the middle temperature is higher than the surrounding temperature. The experimental analysis of the thermal runaway characteristics of the lithium-ion battery under the pinning conditions shows that the temperature change trend of the battery is the same at each point during the pinning period, but the temperature at the pinning point is the highest. With the increase of the battery SOC, the maximum temperature at each temperature point increases, but the growth rate of the maximum temperature becomes gradually slower. © 2023 IEEE.

关键词： Lithium-ion batteries

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银川市社区护士实践技能及角色功能现状调查分析

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护理学杂志 2019年第4期34卷 96-98页

作者：刘赟赟何旭文牛萌刘国莲宁夏医科大学护理学院宁夏银川750004

目的了解银川市社区护士实践技能及角色功能现状,为针对性干预提供参考。方法自制问卷对银川市26家社区卫生服务中心(站)的200名社区护士进行调查。结果社区护士中95.0%认为实践技能在社区卫生服务中发挥着重要作用,95.5%认为实践技能... 详细信息

目的了解银川市社区护士实践技能及角色功能现状,为针对性干预提供参考。方法自制问卷对银川市26家社区卫生服务中心(站)的200名社区护士进行调查。结果社区护士中95.0%认为实践技能在社区卫生服务中发挥着重要作用,95.5%认为实践技能水平关系到护理服务质量及居民满意度,88.5%有提高强化实践技能的需求,42.0%表示完全清楚应具备的各项实践技能,38.0%认为实践技能能够满足工作需求; 69.0%承担了多元角色,仅29.0%对自身角色功能发挥现状表示很满意。结论银川市社区护士对实践技能的认知及重视程度较高,培训意愿较强,但实践技能水平、角色认知及角色功能发挥不足,需进一步加强社区护士的培训,提高其对自身角色的认知,强化社区护士的专业知识及实践技能。

关键词：社区护士实践技能角色功能调查分析

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基于家庭医生签约服务的社区老年2型糖尿病患者居家护理方案构建研究

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哈尔滨医药 2021年第6期41卷 40-42页

作者：郑连花何旭文刘国莲牛萌仇艳敏买娟娟白亚茹宁夏医科大学护理学院宁夏银川750004 三二○一医院陕西汉中723000 宁夏医科大学总医院宁夏银川750004

目的在家庭医生签约服务的基础上,构建一套较为科学、实用的社区老年2型糖尿病患者居家护理方案。方法通过文献回顾、问卷调查、半结构式访谈及专家会议,确定基于家庭医生签约服务的社区老年2型糖尿病患者居家护理方案的框架及具体内容... 详细信息

目的在家庭医生签约服务的基础上,构建一套较为科学、实用的社区老年2型糖尿病患者居家护理方案。方法通过文献回顾、问卷调查、半结构式访谈及专家会议,确定基于家庭医生签约服务的社区老年2型糖尿病患者居家护理方案的框架及具体内容。结果参会专家判断依据系数为0.910,熟悉程度系数为0.820,权威系数为0.865,构建基于家庭医生签约服务的社区老年2型糖尿病患者居家护理方案内容包括居家护理方案的目标和宗旨、居家护理服务团队、居家护理服务流程及内容三部分。结论本研究构建的居家护理方案科学、合理、可靠,可为社区医疗机构开展老年2型糖尿病患者居家护理服务提供依据。

关键词：家庭医生签约服务老年人 2型糖尿病居家护理方案专家会议法

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基于催化臭氧氧化去除煤化工废水中污染物——苯系物

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洁净煤技术 2020年第1期26卷 207-212页

作者：彭思伟何绪文白玉勇谷小兵刘海洋大唐环境产业集团股份有限公司北京100097 中国矿业大学(北京)化学与环境工程学院北京100083

苯、甲苯、乙苯和二甲苯(BTEX)是煤化工废水中典型的难降解有机污染物,通常情况下BTEX较难通过传统的化学氧化技术去除。笔者自主制备了多孔臭氧催化剂,并对催化剂进行表征分析;考察了催化臭氧化降解BTEX的最佳反应条件,并对不同反应体... 详细信息

苯、甲苯、乙苯和二甲苯(BTEX)是煤化工废水中典型的难降解有机污染物,通常情况下BTEX较难通过传统的化学氧化技术去除。笔者自主制备了多孔臭氧催化剂,并对催化剂进行表征分析;考察了催化臭氧化降解BTEX的最佳反应条件,并对不同反应体系中自由基的激发情况进行比对;在此基础上探究催化臭氧化对BTEX的去除机理,为BTEX在实际处理过程中的技术应用提供理论基础。XRD分析结果表明,多孔臭氧催化剂含有氧化铝、氧化硅等,且含有沸石结构的化合物。XPS分析结果表明,所合成的催化剂含Si、O、Cu、Fe、Mn、Al等元素。SEM结果表明,催化剂由许多不规则的细小块状粉末构成,且表面非常蓬松,堆叠成多级结构,使催化剂呈多孔性。比表面积分析表明,催化剂的比表面积为20.8 m^2/g,孔隙直径主要集中在3.8 nm。使用该催化剂对BTEX进行催化臭氧化试验,结果表明,反应温度为30℃、溶液pH=8、臭氧投加量为3.5 mg/L、催化剂投加量为5 g/L时,BTEX的降解效果最佳。在该反应体系中有机物去除率为99.1%,其中苯、甲苯、乙苯、二甲苯的去除率分别为95.6%、98.2%、100%、100%。ESR分析结果表明,催化臭氧化反应体系中羟基自由基和超氧自由基的激发强度明显高于臭氧氧化反应体系,这是因为本文制备的催化剂含有Al、Fe、Mn、Cu氧化物,使催化反应过程中负载的金属氧化物价态间相互变化,转移的电子可促进臭氧分子分解,从而产生更多的自由基。催化臭氧化技术是以羟基自由基为主导,超氧自由基、催化剂吸附为辅助,协同实现煤化工废水中典型有机污染物BTEX的高效去除。

关键词：苯系物催化臭氧化煤化工废水自由基典型有机污染物

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Study on three-point bending behavior of sandwich beams with novel auxetic honeycomb core

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MATERIALS TODAY COMMUNICATIONS 2023年 35卷

作者： Li, Lizheng he, Qiang Jing, xuwen Jiang, Yonggang Yan, Dejun Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212000 Peoples R China Cssc Huangpu Wenchong Shipbuilding Co Ltd Guangdong Prov Key Lab Adv Welding Technol Ships Guangzhou 510715 Peoples R China

To further enhance the impact resistance of honeycomb sandwich beams, an auxetic honeycomb core is proposed by introducing rhombic structure into the concave hexagonal honeycomb, thus obtaining a new auxetic honeycomb core sandwich beam (NDH). The bending resistance of NDH is investigated through numerical simulations. The analysis confirms that the NDH has better bending resistance and energy-absorbing properties than the internally concave hexagonal honeycomb sandwich beam (REH). Furthermore, the stable plastic deformation and high energy absorption is closely related to the bearing position and structural parameters. When the punch is directly above the new honeycomb cell (T-position), NDH shows better bearing capacity. In addition, increasing the panel thickness is conducive to enhancing the bending resistance of sandwich beam. The panel thickness arrangement with t(f)/t(b) > 1 has better bending resistance than other arrangements under the same total front and rear panel thickness. The composite proportional assessment method (COPRAS) is further used to set affect weights of structure parameters on its bending resistance. It is proved that the bending resistance of NDH may be rapidly enhanced by thickening new honeycomb cells. This research provides some perspectives and methods for the future research on the impact resistance for sandwich panels with novel honeycomb core.

关键词： Sandwich beam New auxetic honeycomb core Three-point bending Complex proportional assessment method

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Impact resistance analysis and multi-objective optimization of polyurea-coated auxetic honeycomb sandwich panels

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MATERIALS TODAY COMMUNICATIONS 2023年 35卷

作者： he, Qiang Li, Lizheng Jing, xuwen Jiang, Yonggang Yan, Dejun Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212000 Peoples R China Cssc Huangpu Wenchong Shipbuilding Co Ltd Guangzhou 510715 Peoples R China

To investigate the protective capacity and mechanism of polyurea-coated auxetic honeycomb sandwich structures under impact loading. The mechanical properties of a sandwich panel under the action of a cylindrical punch is numerically simulated by LS-DYNA. Firstly, the impact of different coating positions on the protective properties of sandwich panels is analyzed and concluded which coating method is most effective. Then, the mechanism of the impact resistance of sandwich panels strengthened by the thickness, grading and orientation of the auxetic honeycomb cores is discussed by outline volume analysis. Finally, a multi-objective optimization of the sandwich panel's internal concave hexagonal structural parameters with the best impact resistance is carried out. It is shown that the coating of polyurea elastomers can effectively increase the impact protection performance of sandwich panels. The best impact resistance is achieved by the back side coated sandwich panel (type B). Increasing the wall thickness of auxetic honeycomb and the thickness of the upper graded honeycomb core can effectively increase the impact resistance of the type B sandwich panel. Optimized type B sandwich panel has a 6.2% reduction in maximum deflection (D) compared to the unoptimized version. The findings of this research provide a reference for the study and design of polyurea-coated sandwich panels.

关键词： Polyurea elastomer Auxetic honeycomb Impact resistance Numerical simulation

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SEIARN Parameter Adaptive Model based on SSA

International Core Journal of Engineering

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International Core Journal of Engineering 2023年第4期9卷 378-383页

作者： Zhiwei Yang Yuqing Sun Hangyu he Xinru Li xuwen Sun

The SEIARN model is often used to predict infectious diseases, but the parameter estimation of the SEIARN model has always been one of the difficulties in this research. Traditional statistical and empirical estimation methods have certain limitations. To this end, we designed an SSA‐based SEIARN parameter adaptive model, optimized parameters through SSA, and used historical epidemic data in hebei, Tianjin, and Beijing for simulation. Experiments finally proved the feasibility of the algorithm.

关键词： SEIARN SSA Parameter Optimization Epidemic Prediction

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Design of a new scintillator-based fast ion loss detector on the HL-2A tokamak

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JOURNAL OF INSTRUMENTATION 2024年第10期19卷 P10013-P10013页

作者： Han, Yuxiao Xie, Jinlin Zhang, Jie he, Xiaofei Wang, Yongqing Liu, Linzi Xu, Hongbing Zhan, xuwen Liu, Kuancheng Zhang, Yipo Shi, Zhongbing Chen, Wei Zhong, Wulv Xu, Min Zhuang, Gea Univ Sci & Technol China Dept Plasma Phys & Fus Engn Hefei Anhui Peoples R China Southwestern Inst Phys Chengdu Sichuan Peoples R China

A new scintillator-based fast ion loss detector (FILD) has been devised for the HL-2A tokamak, with the objective of discerning the temporal evolution of energy and pitch angle among lost fast ions. A code named FILD Simulation (FSC) has been developed to assist in the design of the detector head and the interpretation of experimental data. By optimising the geometric design, the resolutions of energy and pitch angle are optimised to 5 keV and 3 degrees, respectively. A branched imaging fiber bundle is used to relay the fluorescence image on the scintillator to two distinct instruments. One of these is a high-speed camera, while the other is a silicon photomultiplier tube (SiPM) array with a sampling rate of up to 1 MSamples/s. This configuration enables the attainment of superior temporal and spatial resolution, as well as high photon sensitivity.

关键词： Nuclear instruments and methods for hot plasma diagnostics Plasma diagnostics- high speed photography Plasma diagnostics- probes Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)

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基于CDIO理念的社区护理学课程形成性评价方案的构建与实践

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卫生职业教育 2020年第7期38卷 23-25页

作者：刘国莲宁艳花何旭文牛萌刘赟赟郑连花仇艳敏宁夏医科大学护理学院宁夏银川750004

目的基于CDIO理念探讨形成性评价方案在社区护理学教学中的应用效果。方法选择宁夏医科大学2016级94名护理本科生为研究对象,其中1班为实验组,2班为对照组。实验组采用基于CDIO理念的形成性评价方案,对照组采用传统教学方法。课程结束后... 详细信息

目的基于CDIO理念探讨形成性评价方案在社区护理学教学中的应用效果。方法选择宁夏医科大学2016级94名护理本科生为研究对象,其中1班为实验组,2班为对照组。实验组采用基于CDIO理念的形成性评价方案,对照组采用传统教学方法。课程结束后,采用自行设计的调查问卷对护生学习积极主动性、课程满意度及自主学习能力等进行分析。结果实验组自主学习能力、学习积极主动性、课程满意度均优于对照组。结论基于CDIO理念的社区护理学形成性评价方案突出护生主体地位,有助于提高护生学习积极性、自主学习能力及课程满意度。

关键词： CDIO理念形成性评价社区护理学

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DRL-Based Dynamic Destroy Approaches for Agile-Satellite Mission Planning

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REMOTE SENSING 2023年第18期15卷 4503页

作者： Huang, Wei Li, Zongwang he, Xiaohe Xiang, Junyan Du, Xu Liang, xuwen ShanghaiTech Univ Sch Informat Sci & Technol Shanghai 201210 Peoples R China Chinese Acad Sci Innovat Acad Microsatellites Shanghai 201306 Peoples R China Univ Chinese Acad Sci Beijing 100039 Peoples R China Henan Acad Sci Inst Math HANS Zhengzhou 450046 Peoples R China

Agile-satellite mission planning is a crucial issue in the construction of satellite constellations. The large scale of remote sensing missions and the high complexity of constraints in agile-satellite mission planning pose challenges in the search for an optimal solution. To tackle the issue, a dynamic destroy deep-reinforcement learning (D3RL) model is designed to facilitate subsequent optimization operations via adaptive destruction to the existing solutions. Specifically, we first perform a clustering and embedding operation to reconstruct tasks into a clustering graph, thereby improving data utilization. Secondly, the D3RL model is established based on graph attention networks (GATs) to enhance the search efficiency for optimal solutions. Moreover, we present two applications of the D3RL model for intensive scenes: the deep-reinforcement learning (DRL) method and the D3RL-based large-neighborhood search method (DRL-LNS). Experimental simulation results illustrate that the D3RL-based approaches outperform the competition in terms of solutions' quality and computational efficiency, particularly in more challenging large-scale scenarios. DRL-LNS outperforms ALNS with an average scheduling rate improvement of approximately 11% in Area instances. In contrast, the DRL approach performs better in World scenarios, with an average scheduling rate that is around 8% higher than that of ALNS.

关键词： agile-satellite mission planning graph attention network deep-reinforcement learning large-neighborhood search dynamic destroy

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