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上海纺织科技 2014年第11期42卷 46-48页

作者：刘若琳上海工程技术大学服装设计系上海201620

裙装是覆盖人体下半身的主要服装之一,也是款式变化最多样的结构之一。裙装结构以纵向的裙长和横向的臀围为基础参考数值,构成矩形的裙装原型结构,它是裙装结构千变万化的基础,然而大部分的裙装都要脱离它的原型,而寻求一个新的结构形... 详细信息

裙装是覆盖人体下半身的主要服装之一,也是款式变化最多样的结构之一。裙装结构以纵向的裙长和横向的臀围为基础参考数值,构成矩形的裙装原型结构,它是裙装结构千变万化的基础,然而大部分的裙装都要脱离它的原型,而寻求一个新的结构形式。这就存在裙装设计的固有规律和发展变化的应用——如何将复杂的裙装款式以平面二维的结构图体现,以适应多变的裙子造型结构设计。

关键词：裙装原型结构设计

基于京津冀地区退役动力电池中钴的流动物质流分析及预测

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再生资源与循环经济 2022年第2期15卷 26-33页

作者：刘若琳高峰杜世伟北京工业大学材制学部工业大数据应用技术国家工程实验室北京100124

随着电动汽车数量在我国的增加,电动汽车退役动力电池的处理也成为亟待解决的问题。钴是动力电池中不可缺少的原材料,同时也是我国的稀缺战略资源。以京津冀地区电动汽车的销量数据为基础,建立了区域性的退役动力电池中钴元素的物质流... 详细信息

随着电动汽车数量在我国的增加,电动汽车退役动力电池的处理也成为亟待解决的问题。钴是动力电池中不可缺少的原材料,同时也是我国的稀缺战略资源。以京津冀地区电动汽车的销量数据为基础,建立了区域性的退役动力电池中钴元素的物质流分析模型,分析了2008—2019年京津冀区域退役动力电池中钴的流动数量、结构和特征,并预测了6种情景下,2020—2030年钴元素的流动趋势。结果表明,2008—2013年,京津冀区域内动力电池中的钴的存量处于低水平阶段,2013年钴的累积存量仅为17.3 t;2014—2019年钴存量处于爆发式增长阶段,2019年钴的累积存量高达3431.9 t。通过设置电动车销量在基础、中速、高速增长的3种情景,发现在电池技术改进情景下,到2030年区域内钴的累积存量相比电池技术不变的情景分别下降11%、13%、13%。该研究成果可为退役动力电池回收政策或法规的制定提供理论参考。

关键词：钴元素物质流分析退役动力电池电动汽车

Frequency Regulation of VSC-MTDC System with Offshore Wind Farms

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC)system with offshore wind farms enhances the frequency stability by compensating the power for a disturbed AC ***,it is difficult to reasonably allocate frequency-regulation resources due to a lack of coordination mechanisms between wind farms and the MTDC ***,it is difficult for the frequency control of the wind farms to manage changes in wind speed;and the risk of wind-turbine stalls is ***,based on the kinetic energy of wind turbines and the power margin of the converters,the frequency-regulation capability of wind turbines is evaluated,and a dynamic frequency-support scheme considering the real-time frequency-support capability of the wind turbines and system frequency evolution is proposed to improve the frequency-support performance.A power adaptation technique at variable wind speeds is developed;the active power in the frequency-support stage and restoration stage is switched according to the wind speed.A hierarchical zoning frequency-regulation scheme is designed to use the frequency-regulation resources of different links in the MTDC system with wind *** simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind-speed changes and avoids multiple frequency dips.

关键词： Wind generation voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC) frequency regulation cooperative control adaptive control variable wind speed

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中国传统腰衣结构的当代创新设计

天津纺织科技 2023年第1期 6-10页

作者：郑江霞刘若琳上海工程技术大学纺织服装学院上海201620

腰衣是中国传统服装的重要组成部分,它的发展随着中国历代服装的变迁而呈现出多样化的结构特征,是中国传统服装中重要的文化符号。文中以中国传统服装腰衣结构为研究对象,通过历史文献、图像和实物等资料,梳理中国传统腰衣结构的历史沿... 详细信息

腰衣是中国传统服装的重要组成部分,它的发展随着中国历代服装的变迁而呈现出多样化的结构特征,是中国传统服装中重要的文化符号。文中以中国传统服装腰衣结构为研究对象,通过历史文献、图像和实物等资料,梳理中国传统腰衣结构的历史沿革,将其分为束腰式结构、腰裳式结构和腰衣式结构3种类别,针对其构成特点展开传统结构构成方法的分析以及在当代服装中的创新设计探索。研究表明,中国传统腰衣结构是集功能和审美于一体的设计,将其结构应用于当代服装设计中,既是对传统服装的传承,同时又拓宽了当代服装腰衣结构的类别。

关键词：中国传统服装腰衣结构设计当代服装创新设计

A Novel Design of a Pre-separation Panel Structure to Protect Against the Impact of an Explosion in an Aircraft Plenum Chamber

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Acta Mechanica Solida Sinica 2024年第1期37卷 166-180页

作者： Zongxing liu Xiang Yang Jun liu School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China COMAC Shanghai Aircraft Design and Research Institute Shanghai 201210China

To reduce the damage of the pressurizing panel structure of a fuselage caused by an explosion at the“least risk bomb location”in an aircraft structure,a new pre-separation panel structure was designed to resist blast ***,the dynamic strain response and morphology of impact damage of the new pre-separation panel were measured in an impact damage ***,the commercial software LS-DYNA was used to calculate the propagation of the blast shock wave,and the results were compared with empirical equations to verify the rationality of the numerical calculation ***,the fluid–structure coupling method was used to calculate the damage process of the pre-separation panel structure under the impact of an explosion wave and an impact *** calculated results were in good agreement with the test results,which showed the rationality of the calculation method and the *** residual strength of the damaged pre-separation panel was significantly higher than that of the original damaged *** results show that the new pre-separation panel structure is reasonable and has certain significance for guiding the design of plenum chambers with strong resistance to implosion for aircraft fuselages.

关键词： Pre-separation panel structure Explosive response Residual strength Aircraft plenum chamber Least risk bomb location

Effectiveness and safety of acupuncture in treatment of pregnancyrelated symptoms:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第1期44卷 16-26页

作者： liu Tingting liu Tongou liu Mingfu School of Traditional Chinese Medicine Clinical Medicine Hubei University of Traditional Chinese MedicineWuhan 430000China First Clinical College of Hubei University of Traditional Chinese Medicine Wuhan 430000China Department of Acupuncture and Tuina Affiliated Hospital of Hubei University of Traditional Chinese MedicineHubei Provincial Hospital of Traditional Chinese MedicineWuhan 430000China

OBJECTIVE:To systematically evaluate the efficacy and safety of acupuncture(AM)in the treatment of pregnancyrelated symptoms such as acute vomiting during ***:We comprehensively searched the available literature up to November 2021,including Pub Med,Embase,Cochrane Library,Chinese Biomedical Literature Database,and China National Knowledge Infrastructure Database,for randomized controlled trials(RCTs)on AM for the treatment of severe vomiting,insomnia,pharyngeal and pelvic pain,mood abnormalities,and dyspepsia during ***:Sixteen RCTs with a cumulative sample size of 1178 cases were *** these,964 patients were included in the *** Meta-analysis results showed that AM was more efficient than Western medicine in treating discomfort during pregnancy[odds ratio(OR)=1.19,95%confidence interval(CI)(1.11,1.28),P<0.01].AM was better than the control group in improving the visual analog scale scores[standard mean difference(SMD)=0.62,95%CI(0.53,0.71),P<0.01].AM was superior to the control group in improving Numerical Rating Scale(NRS)symptom scores[OR=7.31,95%CI(3.36,15.94),P<0.01].There was no significant difference in adverse effects between the AM and sham-AM groups and the analgesic drug group[OR=0.70,95%CI(0.39,1.28),P=0.25],but the treatment and control groups had mild adverse effects with a low ***:AM is more effective than other treatments or pharmacotherapy alone in the treatment of pregnancy-related symptoms,and is relatively ***,the quality of the included trials was rather poor,and high-quality studies are required to confirm our findings.

关键词： acupuncture pregnancy nausea vomiting sleep initiation and maintenance disorders low back pain pelvic pain mood abnormalities Meta-analysis systematic review

Stochastic Unit Commitment with High-Penetration Offshore Wind Power Generation in Typhoon Scenarios

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 535-546页

作者： Yanqi liu Dundun liu Hongcai Zhang State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China University of Macao Zhuhai UM Science and Technology Research Institute ZhuhaiChina

To tackle the energy crisis and climate change,wind farms are being heavily invested in across the *** China's coastal areas,there are abundant wind resources and numerous offshore wind farms are being *** secure operation of these wind farms may suffer from typhoons,and researchers have studied power system operation and resilience enhancement in typhoon ***,the intricate movement of a typhoon makes it challenging to evaluate its spatial-temporal *** published papers only consider predefined typhoon trajectories neglecting *** address this challenge,this study proposes a stochastic unit commitment model that incorporates high-penetration offshore wind power generation in typhoon *** adopts a data-driven method to describe the uncertainties of typhoon trajectories and considers the realistic anti-typhoon mode in offshore wind farms.A two-stage stochastic unit commitment model is designed to enhance power system resilience in typhoon *** formulate the model into a mixed-integer linear programming problem and then solve it based on the computationally-efficient progressive hedging algorithm(PHA).Finally,numerical experiments validate the effectiveness of the proposed method.

关键词： Unit commitment two-stage stochastic programming offshore wind farm typhoon

Frenchay活动量表在中国正常人和脑卒中患者应用中的信度研究

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中国康复医学杂志 2011年第4期26卷 323-328,336页

作者：刘若琳王宁华北京大学第一医院物理医学与康复科北京100034

目的:探讨Frenchay活动量表在我国正常人群中的适用情况以及在正常人和脑卒中患者应用中的信度。方法:选取受试者109例,其中正常人70例,脑卒中患者39例。由同一名评定者采用Frenchay活动量表分别对正常人和脑卒中患者共进行2次评定,间隔... 详细信息

目的:探讨Frenchay活动量表在我国正常人群中的适用情况以及在正常人和脑卒中患者应用中的信度。方法:选取受试者109例,其中正常人70例,脑卒中患者39例。由同一名评定者采用Frenchay活动量表分别对正常人和脑卒中患者共进行2次评定,间隔为1周。采用SPSS16.0分别对正常人和脑卒中患者的2次Frenchay活动量表重复性评定结果。结果:Frenchay活动量表在正常人及脑卒中患者组中均有较好的重测信度,组内相关系数分别为0.969和0.991。结论:Frenchay活动量表在正常人及脑卒中患者组中均有较好的重测信度。但因Frenchay活动量表中存在一些项目对我国人群不适用,故欲大规模使用,则需进行相应的修订。

关键词： Frenchay活动量表脑卒中工具性日常生活活动

Revealing the role of electrode potential micro-environments in single Mn atoms for carbon dioxide and oxygen electrolysis

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Nano Research 2024年第9期17卷 7957-7966页

作者： Pengcheng liu anyi liu Kaili Wang Shuai Shi Mengmeng Jin Jingxiu liu Tao Qin Qian liu Xijun liu Jia He Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringInstitute of New-Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Chemistry and Chemical Engineering and Environmental Engineering Weifang UniversityWeifang 261061China Department of Electrical Engineering and Automation Luoyang Institute of Science and TechnologyLuoyang 471023China Institute for Advanced Study Chengdu UniversityChengdu 610106China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Elucidation the relationship between electrode potentials and heterogeneous electrocatalytic reactions has attracted widespread *** we construct the well-defined Mn single-atom(MnSA)catalyst with four N-coordination through a simple thermal pyrolysis preparation method to investigate the electrode potential micro-environments effect on carbon dioxide reduction reactions(CO_(2)RR)and oxygen reduction reactions(ORR).MnSA catalysts generate higher CO production Faradaic efficiency of exceeding 90%at-0.9 V for CO_(2)RR and higher H_(2)O_(2)yield from 0.1 to 0.6 V with excellent ORR *** functional theory(DFT)calculations based on constant potential models were performed to study the mechanism of MnSA on CO_(2)*** thermodynamic energy barrier of CO_(2)RR is lowest at-0.9 V *** hydrogen electrode(RHE).Similar DFT calculations on the H_(2)O_(2)yield of ORR showed that the H_(2)O_(2)yield at 0.2 V was *** study provides a reasonable explanation for the role of electrode potential micro-environments.

关键词： electrode potential micro-environments Mn single-atom catalyst carbon dioxide reduction reaction oxygen reduction reaction constant potential models