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Study on the Efficacy Claim and Evaluation Method of Lip Cosmetics

China Detergent & Cosmetics 2024年第1期9卷 54-62页

作者： Wu Fan pan yao Zhao Hua Zhu Wei Lin Lin Fan Yangyi Department of Cosmetics College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityChina Beijing Key Laboratory of Plant Resources Research and Development China Shanghai Corday Biotechnology Co. Ltd.China

To study the efficacy of lip moisturizing cosmetics and explore the methods for evaluating their efficacy.The claimed efficacy and number of claimed efficacy of 44 lip moisturizing cosmetics were investigated,and a combination of in vitro and human testing was used to evaluate the efficacy of the lip moisturizing cosmetics.The efficacy claims of lip cosmetics mainly included 4 categories of moisturizing,repairing,soothing and anti-wrinkle,with 79.55%of the products claiming 3~4 categories of efficacy.In the in vitro test,the cell morphology of the skin damage model improved and the secretion of pro-inflammatory factors decreased significantly.In the human trial,the water content,skin softness and brightness L value of the cuticle of the lips increased significantly in 31 subjects,and the transepidermal water loss,redness a value,and the area and volume of lip wrinkles decreased significantly;the dryness of the lip skin and the uniformity of the skin texture improved significantly.The dryness of lip skin and the uniformity of skin texture were significantly improved.The results show that the moisture content of the stratum corneum can be used to evaluate the moisturizing efficacy of lip products.The transepidermal water loss,skin color,skin softness and expert assessment can be used to evaluate the repairing efficacy.The observation of cell morphology of skin damage models and the detection of pro-inflammatory factor content can be used to evaluate the soothing efficacy.The area and volume of lip wrinkles can be used to evaluate the anti-wrinkle efficacy of products.

关键词： lip cosmetic efficacy claim clinical trial in vitro test

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Limits of Uneven Battery Power in Modular Multilevel Converter-based Battery Energy Storage Systems

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 686-695页

作者： yao pan Xiaofeng Sun Wei Zhao Xin Li yao Cai Institute of Electrical Engineering Yanshan UniversityQinhuangdao 066004China

For modular multilevel converter-based battery energy storage systems (MMC-BESS), uneven power among batteries of SMs will be deduced by battery aging, battery fault, etc., which will degrade performance and even lead to system failure. For maintaining the balance of capacitor voltage, this paper analyzes the limits of the uneven power of batteries, which are presented as the current limits in this paper. According to analysis, an analytical method is proposed that only the dc and fundamental frequency components of the arm current are used to calculate current limits. With the current limits it is able to evaluate the reasonability of power distribution among batteries. Meanwhile, increase of fundamental frequency component will enhance the current limits, and the dc component determines the size relationship between the absolute values of the upper and lower current limits. Finally, simulation model and experiment prototype are built for verifying the theoretical analysis and current limits calculation method, and satisfactory results are provided.

关键词： Arm current balance of capacitor voltage current limits MMC-BESS uneven power

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Estimation and validation of characteristic length of internal solitary wave based on normal mode coupling

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Chinese Journal of Acoustics 2024年第1期43卷 82-97页

作者： FAN Lei yao pan AO Peiting WANG Huigang School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072

For a fluid medium with density stratification, the internal wave is easily observed under disturbance of waves, and the acoustic transmission loss and the characteristic parameters of the internal solitary wave are related. The mathematical relationship between the horizontal wavenumber difference of normal modes and the characteristic length of internal wave is established according to the coupling theory of normal modes. Furthermore, a method for estimating the characteristic length of internal solitary wave based on active acoustic means is proposed. The numerical simulation results reveal that the internal solitary wave has a significant influence on the forward transmission of sound waves.At a specific frequency, the transmission loss of sound waves fluctuates significantly and is related to the wavenumber difference of the coupling between internal waves and normal modes. An experiment system for studying internal waves in a tank is established, and the forward scattering data of the internal waves are collected by using a developed broadband transient plasma sound source. The feasibility of estimating the characteristic parameters of the internal solitary wave based on the resonance phenomenon is verified through experimental data analysis.

关键词： stratification wave characteristic

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Determining hydrothermal deactivation mechanisms on Cu/SAPO-34 NH_(3)-SCR catalysts at low-and high-reaction regions:establishing roles of different reaction sites

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Rare Metals 2022年第6期41卷 1899-1910页

作者： Qing-Jin Lin Ming-Ming Pei pan yao Shi Xu Shu-Hao Xu Shuang Liu Hai-Di Xu Yi Dan yao-Qiang Chen State Key Laboratory of Polymer Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610064China Key Laboratory of Green Chemistry and Technology College of ChemistrySichuan UniversityMinistry of EducationChengdu 610064China .Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610064China Weichai Power Co. LtdWeifang 261061China Sichuan Provincial Automobile Exhaust Purification Engineering Technology Research Center Chengdu 610064China Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center Chengdu 610064China

Hydrothermal deactivation is a constant chal-lenge in commercial catalytic process aimed at NOx emission control,which may be observed in the low(150-400℃)or high(400-550℃)-reaction regions.To the best of our knowledge,there is a lack of systematic research regarding the correlation between the reaction sites and the mechanism of hydrothermal degradation at various reaction regions.For a targeted investigation of this,Cu/zeolite catalysts have been prepared using different amounts of polyvinyl alcohol for adjusting their redox and acid properties.These catalysts exhibit hydrothermal deactivation in different reaction regions.No change is observed in the reaction mechanism even with hydrother-mal deactivation,but various reaction sites determine the performance deterioration in the low-and high-reaction regions.The redox properties and weak acid sites affect the hydrothermal deactivation in the low-reaction region,whereas the moderate/strong acid sites related to the structure mainly influence the hydrothermal deactivation in the high-reaction region.This work provides several the-oretical insights for optimizing the hydrothermal stabilities of Cu/zeolite catalysts.

关键词： Deterioration mechanism Bifunctional sites Temperature regions Selective catalytic reduction Cu/zeolite

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Robust UV/moisture dual curable PDMS-microcapsule-silica functional material for self-healing,antifouling,and antibacterial applications

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Nano Research 2023年第5期16卷 7810-7819页

作者： Nan Zheng Jie Liu Guoqing Wang pan yao Lihong Dang Ze Liu Jiufu Lu Wenge Li Shaanxi Key Laboratory of Catalysis School of Chemical and Environmental ScienceShaanxi University of TechnologyHanzhong 723001China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China School of Biological Sciences and Engineering Shaanxi University of TechnologyHanzhong 723001China Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

Polydimethylsiloxane containing methacryloyloxy and methoxy silane groups(MAPDMS)-microcapsule-SiO_(2)(MPMS)functional materials were prepared by constructing micro-nano hierarchical structures on the surface of MAPDMS matrix.Herein,MAPDMS@1,1-stilbene-modified hydrolyzed polyglycidyl methacrylate/graphene oxide/dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride(MAPDMS@PGMA_(m)/GO/QC18)self-healing microcapsules with compact multi-shell structure were synthesized and combined with nano-SiO_(2)to construct the hierarchical structures.Furthermore,ultraviolet(UV)/moisture dual curing mode was introduced into deep curing reaction and efficient self-healing reaction of the MPMS.The results show that the introduction of UV/moisture dual curing mode and micro-nano hierarchical structure gives MPMS functional materials excellent mechanical properties,antifouling properties,self-healing properties,antibacterial properties.The shear strength and tensile strength of MPMS increase from 3.32 and 4.26 MPa of MAPDMS to 3.81 and 5.06 MPa,respectively.Its static contact angle increases from 115.9°of MAPDMS to 156.5°,its slide angle decreases from 68.5°of MAPDMS to 7.8°,respectively.The antifouling performance of MPMS against seawater,soy sauce,juice,coffee,protein,other contaminants is effectively improved compared with MAPDMS matrix.At the same time,the tensile strength and elongation at break of MPMS after healing reach 98.22%and 96.57%of those in original state,respectively.In addition,the antibacterial rates of MPMS against Escherichia coli and Staphylococcus aureus reach 99.85%and 100%,respectively.The MPMS prepared in this paper is expected to be widely used in marine antifouling,pipeline network,anti-icing,microfluidics,wearable devices,medical devices,electrochemical biosensors,other fields.

关键词： ultraviolet(UV)/moisture dual curing mechanism self-healing microcapsules micro-nano hierarchical structure antifouling antibacterial

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一种拓展模块化多电平变换器的光伏系统稳定运行范围的谐波补偿调制策略

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电工技术学报 2024年第4期39卷 1132-1146页

作者：潘尧孙孝峰蔡瑶李昕赵巍燕山大学电力电子节能与传动控制河北省重点实验室秦皇岛066004

由于阴影遮挡、损坏等问题,基于模块化多电平变换器的光伏系统中存在光伏(PV)输出功率不平衡的现象,会使高输出功率PV对应的子模块过调制。谐波补偿调制策略是解决该问题的一种常见方案,通过向高功率PV的子模块中注入谐波而避免子模块... 详细信息

由于阴影遮挡、损坏等问题,基于模块化多电平变换器的光伏系统中存在光伏(PV)输出功率不平衡的现象,会使高输出功率PV对应的子模块过调制。谐波补偿调制策略是解决该问题的一种常见方案,通过向高功率PV的子模块中注入谐波而避免子模块过调制,低功率PV的子模块(称为正常子模块)则需要补偿数量相同、相位相反的谐波,使桥臂内的谐波相抵消而不会造成桥臂电压和电流畸变。然而,在PV功率严重不平衡时,为了避免高功率PV的子模块过调制,现有谐波补偿调制策略需要注入的谐波过大,会超过正常子模块的补偿范围,使正常子模块出现过调制,导致桥臂电压和电流畸变,影响系统的稳定运行。该文提出一种新型谐波补偿调制策略,在高功率PV的子模块不发生过调制的前提下避免正常子模块过调制,保证系统的稳定运行。同时,该文对不同谐波补偿调制策略稳定运行范围进行了定性和定量评估,表明所提谐波补偿调制策略能在更多PV功率不平衡工况下稳定运行。通过仿真与实验验证谐波补偿调制策略在模块化多电平变换器光伏系统中的可行性与理论分析的正确性。

关键词：模块化多电平变换器功率不平衡谐波补偿调制策略过调制稳定运行

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Analysis of Temperature Rise Characteristics and Fatigue Damage Degree of ACSR Broken Strand

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Energy Engineering 2023年第3期120卷 617-631页

作者： Jun Zhang Xiaobin Li Long Zhao Zixin Li Shuo Wang pan yao Pengfei Dai Jiangmen Power Supply Bureau Guangdong Power Grid Co.Ltd.Jiangmen529030China School of electronic information Xi’an Polytechnic UniversityXi’an710048China

In this paper,the research on ACSR temperature of broken strand and fatigue damage after broken strand is carried out.Conduct modeling and Analysis on the conductor through AnsoftMaxwell software.The distribution of magnetic force lines in the cross section of the conductor after strand breaking and the temperature change law of the conductor with the number of broken strands are analyzed.A model based on electromagnetic theory is established to analyze the distribution of magnetic lines of force in the cross section of the conductor after strand breaking and the temperature variation law of the conductor with the number of broken strands.The finite element analysis results show that with the increase in the number of broken strands,the cross-sectional area of the conductor decreases,the magnetic line of force of the inner conductor at the broken strand becomes denser and denser,and the electromagnetic loss of the conductor becomes larger and larger.Therefore,the temperature of the conductor at the broken strand becomes higher and higher.Then,the current carrying experiment of conductor is carried out for LGJ-240/30 conductor.It is found that the temperature rise at the junction of inner and outer layers at the broken strand is particularly obvious,and the temperature of inner aluminumconductor at the broken strand also increases with the increase of broken strand.According to the analysis of experimental data,with the increase of broken strands,the antivibration ability and service life of the conductor decrease.At the same time,under certain conditions of broken strand,the fatigue life of conductor increases with the increase of temperature.

关键词： Steady-state temperature fatigue damage electromagnetic finite element magnetic line of force electromagnetic loss

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iRoot BP plus对成人龋源性露髓治疗疗效及对牙髓血流的影响

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上海口腔医学 2024年第2期33卷 160-163页

作者：潘耀耀马晓楠陈呈安徽医科大学第一附属医院口腔科安徽合肥230031

目的:探讨iRoot BP plus对成人龋源性露髓治疗疗效及对牙髓血流的影响。方法:选择2020年1月—2022年1月收治的成人龋源性露髓患者126例(156颗恒牙),采用信封法将患者分为试验组(63例、79颗恒牙)和对照组(63例、77颗恒牙),试验组给予iRoo... 详细信息

目的:探讨iRoot BP plus对成人龋源性露髓治疗疗效及对牙髓血流的影响。方法:选择2020年1月—2022年1月收治的成人龋源性露髓患者126例(156颗恒牙),采用信封法将患者分为试验组(63例、79颗恒牙)和对照组(63例、77颗恒牙),试验组给予iRoot BP plus治疗,对照组给予矿物三氧化聚合体治疗,观察2组治疗效果、操作时间、牙变色等情况。采用SPSS 22.0软件包对数据进行统计学分析。结果:试验组和对照组术后3、6和12个月治疗成功率相比,差异无统计学意义(P>0.05)。试验组每颗牙操作时间为(2.53±0.41)min,显著少于对照组(P<0.05)。试验组术后12个月牙变色发生率为3.80%,显著低于对照组(P<0.05)。试验组术后12个月咬合力和咀嚼效率分别为(16.65±1.14)Ibs和(94.45±5.65)%,显著高于对照组(P<0.05)。结论:iRootBPplus在成人龋源性露髓治疗中疗效较好,具有操作便利、牙变色少、牙髓血流下降后维持平稳、炎症反应程度轻等优点。

关键词： iRoot BP plus 成人龋源性露髓牙髓血流

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计及多重差异的交直流混合多能微网多时间尺度优化调度

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电工技术学报 2024年第11期39卷 3392-3410页

作者：蔡瑶卢志刚潘尧何良策周长磊燕山大学电力电子节能与传动控制河北省重点实验室秦皇岛066004 济宁曲阜机场有限公司济宁272000

近年来,可再生能源发电、热电联产、储能和电力电子变压器(PET)等技术发展迅速,有利于构建多能互补、清洁高效的交直流混合多能微网(MEMG),但不成熟的PET模型和复杂的不确定性为系统的优化调度带来了挑战。为此,首先构建了一种基于三级... 详细信息

近年来,可再生能源发电、热电联产、储能和电力电子变压器(PET)等技术发展迅速,有利于构建多能互补、清洁高效的交直流混合多能微网(MEMG),但不成熟的PET模型和复杂的不确定性为系统的优化调度带来了挑战。为此,首先构建了一种基于三级式PET的交直流混合MEMG结构,建立了包括PET在内的设备模型和不确定性模型;其次,提出了计及多重差异的MEMG多时间尺度优化调度策略,明确了日前-日内-实时三时间尺度调度的协调机制,其中,多重差异包含需求响应资源、系统调度目标和源荷预测精度在时间尺度上的差异,以及不同能量的响应特性差异;再次,建立了对应的多时间尺度优化调度模型,包括日前鲁棒机会约束优化模型、日内随机优化模型和实时分层滚动修正模型,并在日前调度中,改进了传统储能和电热耦合设备的备用模型,设计了基于PET的交直流系统备用共享机制,将调度模型转换为混合整数线性规划模型,给出了利用CPLEX求解器求解多时间尺度调度模型的步骤;最后,通过算例分析表明,所提调度策略可以通过逐级修正调度计划应对不确定性,且所设计备用方案兼具可靠性和灵活性。

关键词：电力电子变压器交直流混合多能微网多重差异多时间尺度优化调度

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国家级非遗项目“水族马尾绣”传承发展现状

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纺织报告 2024年第5期43卷 123-125页

作者：潘瑶三都水族自治县文化广电和旅游局贵州黔南558100

“水族马尾绣”是国家级非物质文化遗产项目,其传承和发展存在一定的时间和空间局限。贵州省三都水族自治县是该项目主要流传地,经过大量田野调查,结合项目自身特征,文章通过观察分析、思考比对发现在现代社会背景下,水族马尾绣等手工... 详细信息

“水族马尾绣”是国家级非物质文化遗产项目,其传承和发展存在一定的时间和空间局限。贵州省三都水族自治县是该项目主要流传地,经过大量田野调查,结合项目自身特征,文章通过观察分析、思考比对发现在现代社会背景下,水族马尾绣等手工技艺类非遗项目传承存在的问题,并积极探索解决路径,以激发项目活态传承,促进项目产品创新研发,提高产业化水平,使非遗文化成为乡村振兴、文化旅游融合发展的“源头活水”,重现时代价值。

关键词：水族马尾绣传承发展现状

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