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Novel integrated three-port DC/DC converter for different operating modes between renewable energy,electrolyser and fuel cell/battery

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Clean Energy 2023年第1期7卷 174-189页

作者： Lilei Jiang Jianxin Qu Lingguo Kong Hejianuig Qian chuang liu Guowei Cai Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of EducationNortheast Electric Power UniversityJilin 132012China State Grid Harbin Power Supply Company HarbinHeilongjiang ProvinceChina

Due to the slow dynamic power-regulation characteristics of the electrolyser(EL),a novel integrated three-port DC/DC converter topology based on a phase-shifted full-bridge converter and dual active-bridge converter is proposed in this ***,the proposed converter can achieve a fast auxiliary response to the *** topology has the features of single-stage conversion,high system integration and compatibility with multiple operation *** operational principles and a hybrid modulation scheme of the proposed converter are analysed in *** addition,the power-transmission characteristics of each port and the soft-switching range are *** these bases,six operation modes suitable for a hydrogen energy-storage system are *** simulation and a 2-kW scaled-down experimental prototype are established to verify the feasibility and effectiveness of the proposed topology in different operation modes.

关键词： renewable energy electrolyser fuel cell three-port DC/DC converter

A Feasible Atmospheric Correction Method to TM Image

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Journal of China University of Mining and Technology 2007年第1期17卷 112-115页

作者： ZHENG Wei liu chuang ZENG Zhi-yuan LONG En Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of Chinese Academy of Sciences Beijing 100039 China College of Geographical Science Nanjing Normal University Nanjing Jiangsu 210097 China

In this paper, an atmospheric correction method to TM image is presented, which can simulate the atmospheric correction parameters, such as optical depth, sky radiance and path radiance at the time the satellite passes,by using interpolation among local meteorological records, parameterization models and dark pixels. The TM image of the Nanjing area in China was corrected by this method. For analyzing the accuracy of this method, the calculated reflectance, apparent reflectance and ground measured reflectance were compared. NDVI before and after atmospheric cor- rection were also compared. The results show that the method is applicable and efficient in the visible to near infrared band of TM image. In order to improve the accuracy of the method, the infrared spectrum measured data for the two other bands of TM image are required in future field investigations. The method is suitable to many other satellite optical remote sensing images with the same or similar spectral characteristics of TM images.

关键词： atmospheric correction remote sensing image TM image

Voussoir beam model for lower strong roof strata movement in longwall mining - Case study

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第6期9卷 1171-1176页

作者： chuang liu Huamin Li Hani Mitri Dongjie Jiang Huigui Li Junfa Feng School of Energy Science and Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Mining and Materials Engineering McGill UniversityMontrealH3A 0E8Canada School of Civil Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Safety Science&Engineering Henan Institute of EngineeringZhengzhou451191China

The paper presents the influence of varying immediate roof thickness on the lower strong roof strata movement and failure pattern in longwall coal mining with large mining height. The investigation is based on 58 geological drill holes and hydraulic shield pressure measurements around the longwall Panel 42105 of the Buertai Mine in Inner Mongolia Autonomous Region, China. The longwall Panel 42105 is characterized by relatively soft immediate roof strata of varying thickness superposed by strong strata,herein defined as lower strong roof. A voussoir beam model is adopted to interpret the structural movement of the lower strong roof strata and shield pressure measurements. It is shown that when the immediate roof is relatively thick, the broken overlying lower strong roof tends to form a stable voussoir beam with previously broken layer, thus not exerting high pressure on the hydraulic shield and working face. When the immediate roof is relatively thin, the broken overlying lower strong roof tends to behave as a cantilever beam, thus exerting higher pressure on the hydraulic shield and working face. Comparison of model predictions with measured time-weighted average shield pressure(TWAP) shows good agreement.

关键词： Immediate roof thickness Voussoir beam Cantilever beam Shield pressure

印度梨形孢-花生共生体系建立及对花生的促生作用

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中国油料作物学报 2024年第2期46卷 385-393页

作者：高洁田培聪党悦嘉李昕芮王趁刘闯黄玉茜沈阳农业大学土地与环境学院辽宁沈阳110866 沈阳农业大学植物保护学院辽宁沈阳110866 吉林大学植物科学学院吉林长春130062

印度梨形孢(Piriformospora indica)是一种内生真菌。为提高花生产量,探究印度梨形孢对花生的促生作用,以花生(粤油7号)为材料,采用室外盆栽实验,建立印度梨形孢与花生共生体系,调查对花生植株的农艺性状、产量、光合特性、丙二醛含量... 详细信息

印度梨形孢(Piriformospora indica)是一种内生真菌。为提高花生产量,探究印度梨形孢对花生的促生作用,以花生(粤油7号)为材料,采用室外盆栽实验,建立印度梨形孢与花生共生体系,调查对花生植株的农艺性状、产量、光合特性、丙二醛含量、根系活力和抗氧化酶活性等生理指标的影响。结果发现:采用菌丝浇灌的方式接种印度梨形孢,成功建立了与花生的共生体系,侵染率为63%。苗期时,叶片叶绿素SPAD值和净光合速率显著增加24.17%和19.66%,蒸腾速率比未接种印度梨形孢的花生植株22%;在苗期与成熟期,接种印度梨形孢的花生主根长、地下部鲜重、地下部干重、根系活力和叶片的过氧化氢酶(CAT)、过氧化物酶(POD)活性显著提高,丙二醛含量分别显著降低24.27%和22.12%;接种印度梨形孢提高了花生产量。

关键词：花生印度梨形孢农艺性状抗氧化酶产量

中药干预NLRP3炎症小体治疗银屑病的研究进展

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中国医药导报 2024年第19期21卷 40-45页

作者：张鑫妍刘闯安月鹏杨素清黑龙江中医药大学研究生院黑龙江哈尔滨150040 黑龙江中医药大学附属第一医院皮肤科黑龙江哈尔滨150040

银屑病是一种病程久、病机复杂且易反复发作的慢性炎症性疾病,是临床亟待解决的疑难皮肤病。随着中药对银屑病的深入研究,诸多从NLRP3炎症小体角度开展研究中药治疗银屑病的作用机制,对提高银屑病治疗的准确性、多样性和降低药物的副作... 详细信息

银屑病是一种病程久、病机复杂且易反复发作的慢性炎症性疾病,是临床亟待解决的疑难皮肤病。随着中药对银屑病的深入研究,诸多从NLRP3炎症小体角度开展研究中药治疗银屑病的作用机制,对提高银屑病治疗的准确性、多样性和降低药物的副作用具有重要意义。中药有效成分黄酮类、萜类、酚类等化合物及中药复方通过干预NLRP3炎症小体活化,可有效抑制胱天蛋白酶-1激活和促炎症细胞因子的成熟与分泌,诱导自噬、调控细胞焦亡和抑制角质形成细胞异常增殖,减轻银屑病皮损中炎症反应,从而改善银屑病病变。本文综述近年来中药调控NLRP3炎症小体治疗银屑病的研究进展,重点介绍中药单体有效成分及中药复方对NLRP3炎症小体活化的抑制作用及其相关机制,并探讨中药在治疗银屑病中的临床应用及前景,以期为中药调控NLRP3炎症小体治疗银屑病的深入研究和应用开发提供新的思路和方法。

关键词： NLRP3 炎症小体银屑病中药

中药调控核因子-κB(NF-κB)信号通路治疗银屑病的研究进展

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现代药物与临床 2024年第7期39卷 1906-1912页

作者：刘闯张鑫妍安月鹏杨素清黑龙江中医药大学黑龙江哈尔滨150040 黑龙江中医药大学附属第一医院黑龙江哈尔滨150040 黑龙江中医药大学第一临床医学院黑龙江哈尔滨150040

银屑病是一种慢性自身免疫性皮肤病,其核心是免疫反应失调和角质形成细胞增殖异常。核因子-κB(NF-κB)在银屑病中是一种关键的调节信号通路,通过抑制NF-κB信号途径或下游转录因子肿瘤坏死因子-α(TNF-α)或白细胞介素-17(IL-17)/白细... 详细信息

银屑病是一种慢性自身免疫性皮肤病,其核心是免疫反应失调和角质形成细胞增殖异常。核因子-κB(NF-κB)在银屑病中是一种关键的调节信号通路,通过抑制NF-κB信号途径或下游转录因子肿瘤坏死因子-α(TNF-α)或白细胞介素-17(IL-17)/白细胞介素-23(IL-23)成为未来银屑病治疗的一个新方向。中药针对NF-κB信号通路在银屑病治疗中具有疗效确切、手段多样、不良反应小等优势。总结了中药调控丝裂原活化蛋白激酶(MAPK)/NF-κB、NF-κB/信号传导和转录激活因子3(STAT3)、Toll样受体4(TLR4)/NF-κB信号通路治疗银屑病的研究进展,以期为中药治疗银屑病提供更新策略。

关键词：中药银屑病核因子-κB 丝裂原活化蛋白激酶/核因子-κB信号通路核因子-κB/信号传导和转录激活因子3信号通路 Toll样受体4/核因子-κB信号通路

An unexpected generation of magnetically separable Se/Fe3O4 for catalytic degradation of polyene contaminants with molecular oxygen

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Chinese Chemical Letters 2020年第12期31卷 3205-3208页

作者： Xingyu Chen Jingfei Mao chuang liu Chao Chen Hongen Cao Lei Yu School of Horticulture and Plant Protection Yangzhou UniversityYangzhou 225009China Guangling Coliege Yangzhou UniversiryYangzhou 225000China School of Chemnistry and Chemical Engineerinig Yangzhou UniversityYangzhou 225002China Depaortment of Applied Chemistry Faculty of EngineeringKyushu institute of TechnologyKitakyushu 804-8550Japan

Selenization of Fe2O3 with NaHSe led to Se/*** unexpected generation of Fe3O4 attributed to the reduction conditions of the reaction,and the resulted magnetic features of the material facilitated its separation in practical *** to the synergistic effect of Se with Fe,the material was especially active to catalyze the oxidative C=C scission using O2 as mild *** technique has been successfully applied in polyene degradation project,which is of profound practical values for the treatment of the polyene pigment pollution and may be applied in the food and pha rmaceutical industry.

关键词： Magnetic materials Nanoparticles Nanocomposites Oxidation Polyene degradation

基于ISSA-KELM的电动汽车动力电池SOC估算

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东北电力技术 2024年第8期45卷 1-5,12页

作者：陈柏寒杨威万文欣刘闯国网荆门供电公司湖北荆门448000

为了提高电动汽车动力电池荷电状态(state of charge, SOC)估算结果的准确性,提出了一种基于改进麻雀算法(improved sparrow search algorithm, ISSA)优化核极限学习机(kernel extreme learning machine, KELM)的电动汽车动力电池SOC估算方法。首先,以电压、电流、温度为输入量,以电池SOC为输出量,采用Logistic混沌初始化、惯性权重非线性递减和莱维飞行等策略改进得到的ISSA算法对KELM进行优化;其次,建立了基于ISSA-KELM的电动汽车动力电池SOC估算模型;最后,采用磷酸铁锂电池充放电数据进行仿真分析,并与其他电池SOC估算方法进行对比。仿真结果表明,所提ISSA-KELM模型对测试集预测结果的最大相对误差、平均相对误差和均方根误差分别为6.232%、3.964%和0.0197,诊断精度和模型稳定性均优于其他方法,验证了所提电池SOC估算方法的有效性。

关键词：电动汽车动力电池荷电状态核极限学习机改进麻雀算法

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高韧性3D打印光敏树脂制备及性能研究

印刷与数字媒体技术研究 2024年第3期 274-282页

作者：刘创纪徐英杰黄蓓青赵星宇王雨欣北京印刷学院印刷与包装工程学院北京102600

数字光处理(DLP)打印技术在各种3D打印技术中具有明显优势,高性能、高韧性的DLP打印用光敏树脂具有巨大的市场需求。本研究针对光敏树脂固化过程中的水平尺寸稳定性,设计了一种测试方法,探究了单体、预聚物种类、引发剂含量、光固化时... 详细信息

数字光处理(DLP)打印技术在各种3D打印技术中具有明显优势,高性能、高韧性的DLP打印用光敏树脂具有巨大的市场需求。本研究针对光敏树脂固化过程中的水平尺寸稳定性,设计了一种测试方法,探究了单体、预聚物种类、引发剂含量、光固化时间等因素对树脂水平尺寸稳定性的影响,得到了树脂水平尺寸最佳稳定性的参数。然后制备出了适合DLP打印技术的柔性和刚性光敏树脂,将两种树脂按一定比例混合,测试了打印样品的拉伸强度等力学特性,对样品拉伸断裂面进行了扫描电镜分析,研究了树脂组分对材料韧性的影响。结果表明,将刚性光敏树脂作为连续相,提供弹性模量,将柔性光敏树脂作为分散相,提供应力集中物,二者分别以3∶1、1∶1的质量比混合,能够大幅提高打印材料的韧性和断裂伸长率。

关键词： 3D打印光敏树脂高韧性尺寸稳定性