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湿工况下带翼翅片管传热传质特性的数值研究

化学工程 2024年第7期52卷 45-50页

作者：朱建利阴继翔李娜英陈实乔鹏飞太原理工大学电气与动力工程学院山西太原030024

采用壁面反应原理建立冷凝传热模型,模拟研究平直翅片管、矩形翼翅片管以及弓形翼翅片管的通道内湿空气流动及传热传质特性。结果表明:当湿空气入口温度为328 K,水蒸气质量分数为11.2%时,矩形翼翅片管和弓形翼翅片管的传热因子相比于平... 详细信息

采用壁面反应原理建立冷凝传热模型,模拟研究平直翅片管、矩形翼翅片管以及弓形翼翅片管的通道内湿空气流动及传热传质特性。结果表明:当湿空气入口温度为328 K,水蒸气质量分数为11.2%时,矩形翼翅片管和弓形翼翅片管的传热因子相比于平直翅片管分别提高了24.9%—35.7%、26.7%—36.4%,传质因子分别提高了24.1%—35.4%、25.9%—38.3%,但矩形翼翅片管和弓形翼翅片管通道内工质的流动阻力系数分别增加了19.4%—25.3%、16.8%—22.9%,说明了矩形翼和弓形翼均可提高翅片管的传热传质特性,但也造成了阻力损失的增加。通过对综合传热性能评价因子的分析,矩形翼翅片管和弓形翼翅片管的综合传热性能评价因子值均>1,其综合传热性能均优于平直翅片管,且弓形翼翅片管综合传热性能最优。

关键词：壁面反应原理传热传质矩形翼和弓形翼综合传热性能

Solvothermal synthesis and thermoelectric properties of skutterudite compound Fe_(0.25)Ni_(0.25)Co_(0.5)Sb_3

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Rare Metals 2009年第3期28卷 237-240页

作者： MI jianli ZHAO Xinbing zhu Tiejun State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

Nanostructured skutterudite-related compound Fe0.25Ni0.25Co0.5Sb3 was synthesized by a solvothermal method using FeCl3, NiCl2, CoCl2, and SbCl3 as the precursors and NaBH4 as the reductant. The solvothermally synthesized powders consisted of fine granules with an average particle size of tens of nanometers. The bulk material was prepared by hot pressing the powders. Transport property measurements indicated a heavily doped semiconductor behavior with n-type conduction. The thermal conductivity is about 1.83 W·m-1·K-1 at room temperature and decreases to 1.57 W·m-1·K-1 at 673 K. The low thermal conductivity is attributed to small grain size and high porosity. A maximum dimensionless figure of merit of 0.15 is obtained at 673 K.

关键词： skutterudite solvothermal synthesis nanomaterials thermoelectric properties

Boron nitride nanofibers enhanced composite PEO-based solid-state polymer electrolytes for lithium metal batteries

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Chinese Chemical Letters 2024年第6期35卷 216-221页

作者： Qianqian Song Yunting Zhang jianli Liang Si Liu Jian zhu Xingbin Yan School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China College of Physics and Materials Science Tianjin Normal UniversityTianjin 300387China Department of Chemistry&Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong Kong 999077China Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology School of Physics and Optoelectronic EngineeringFoshan UniversityFoshan 528225China

Polyethylene oxide(PEO)-based solid-state polymer electrolytes(SPEs)are limited by their poor cyclic stability and inferior ionic conductivity for applicating in high-safety,long-cycling and high-energy-density lithium metal ***,porous boron nitride nanofibers(BNNFs)are filled into PEO-based SPE,which significantly suppresses Li dendrites growth and enhances the electrochemical performance of Li metal *** with high porosity have more active sites to connect with PEO,which can effectively reduce the crystallinity of the PEO matrix and enhance its ionic ***,owing to the hardness and good stability of BNNFs,BNNFs/PEO/Li TFSI electrolyte exhibits a wider electrochemical window,better mechanical property and higher thermal stability compared with PEO/Li TFSI ***,the Li symmetric cell composed of 1%BNNFs/PEO/Li TFSI performs good cyclic stability(>1800 h),and the Li||1%BNNFs/PEO/Li TFSI||LFP full battery shows obviously improved performances in charge-discharge polarization voltage,discharge specific capacity,rate performance and cyclic stability than the Li||PEO/Li TFSI||LFP battery.

关键词： Solid-state polymer electrolyte Boron nitride nanofibers Lithium metal battery Ionic conductivity Li dendrite

基于毕达哥拉斯模糊多属性群决策的卷烟烟支质量评估方法

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江西科学 2024年第2期42卷 411-416页

作者：祝剑利崔浩波刘静杰彭蔚王亚男沈学浙江中烟工业有限责任公司宁波卷烟厂浙江宁波315040

随着卷烟工业企业数字化进程的快速推进,精确恰当的卷烟烟支质量评估方法直接影响卷烟生产质量和效率。根据卷烟烟支质量评估中指标信息具备的多属性、不确定性、模糊性等特点,提出了一种基于毕达哥拉斯模糊多属性群决策的卷烟烟支质量... 详细信息

随着卷烟工业企业数字化进程的快速推进,精确恰当的卷烟烟支质量评估方法直接影响卷烟生产质量和效率。根据卷烟烟支质量评估中指标信息具备的多属性、不确定性、模糊性等特点,提出了一种基于毕达哥拉斯模糊多属性群决策的卷烟烟支质量评估方法。运用毕达哥拉斯模糊集对指标信息进行表述和处理,在专家权重和指标权重未知的情况下,构建综合距离模型和知识测度模型确定权重信息;通过相对距离和信息可靠性定义毕达哥拉斯模糊数排序新方法,并计算各方案集结算子进行排序。最后,通过应用实例对该方法进行验证分析。结果表明,方法可以有效运用于卷烟烟支的质量评估,决策结果更加准确客观。

关键词：毕达哥拉斯模糊多属性群决策卷烟烟支质量评估

维普期刊数据库博看期刊

RF Technologies and Challenges for Future MBR Systems in Cellular Base Stations

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ZTE Communications 2011年第2期9卷 2-7页

作者： Hongyin Liao Baiqing Zong jianli Wang Keqiang zhu Changjiang Cao Wireless Architecture Department ZTE Corporation

This paper describes the advances and features of future cellular base stations. Software defined radio （SDR） evolves to cognitive radio （CR）, which is smart and has wideband, and multiband radio （MBR） with reconfigurable wideband can be regarded as the basis of CR and an advanced level of SDR. Based on the SDR platform, several radio frequency （RF） solutions for implementing MBR systems are proposed, and some challenges to MBR implementation are discussed.

关键词： future cellular base station SDR MBR RF challenges

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Science China(Life Sciences) 2021年第1期64卷 96-106页

作者： Zhijun Zhang Hongxing Zhang Chun-Ming Xie Meng Zhang Yachen Shi Ruize Song Xiang Lu Haisan Zhang Kun Li Bi Wang Yongfeng Yang Xianrui Li jianli zhu Yang Zhao Ti-Fei Yuan Georg Northoff Department of Neurology of Affiliated Zhongda Hospital Institute of Neuropsychiatry and Medical School of Southeast UniversityNanjing210009China Department of Psychology of Xinxiang Medical University Xinxiang453003China Second Affiliated Hospital of Xinxiang Medical University Xinxiang453002China Deaprtment of Biostatistics School of Public HealthNanjing Medical UniversityNanjing211166China Shanghai Mental Health Center Shanghai Jiaotong University School of MedicineShanghai200030China Mental Health Center and 7th Hospital Zhejiang University School of MedicineHangzhou310013China Royal Ottawa Mental Health Centre University of Ottawa Institute of Mental Health ResearchOttawaONK1Z 7K4Canada

To determine whether repetitive transcranial magnetic stimulation(rTMS)of the visual cortex(VC)provides effective and welltolerated treatment and whether magnetic resonance imaging(MRI)measures functional change of the VC as a biomarker of therapeutic effect in major depressive disorder(MDD),we performed a sham-controlled,double-blind,randomized,three-arm VC rTMS treatment study in 74 MDD *** rTMS(10 Hz,90%of resting motor threshold,1,600 pulses over20 min twice per day)was performed over the VC for five *** outcome was measured by Hamilton Depression Rating Scale(HAMD-24)at days 0,1,3,5 and after terminating rTMS,with follow-up at four *** was measured at days 0 *** individualized group exhibited the greatest change in HAMD-24 scores after VC rTMS for 5 days(F=5.53,P=0.005),which were maintained during follow-up period(F=4.22,P=0.016).All patients reported good *** in VC taskrelated functional MRI correlated with symptomatic reduction in the individualized *** reduced the initially abnormal increase in resting state functional connectivity from the VC to the pre/subgenual anterior cingulate cortex at day 5,especially in the individualized *** demonstrated therapeutic potential and good tolerance of VC rTMS in MDD patients,indicated by biomarkers of f MRI measurement.

关键词： major depressive disorder visual cortex functional magnetic resonance imaging repetitive transcranial magnetic stimulation neuronavigated individualized treatment

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从患者安全十大目标看医疗过程中的病人安全

中国卫生事业管理 2009年第5期26卷 309-310页

作者：朱建丽天津市第四中心医院天津300140

分析医疗过程中影响病人安全的因素及病人安全问题带来的后果,结合中国医院协会颁布的"2008年中国患者安全十大目标",阐述在医疗过程中保障病人安全的措施。

关键词：医疗过程病人安全

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中国大学生的记忆的自我参照效应

心理科学 2002年第3期25卷 275-278页

作者：戚健俐朱滢北京大学心理学系 100871

记忆的自我参照效应是指记忆材料与自我相联系时的记忆效果优于其它编码条件的现象 ,这种优势主要体现在以回忆经验为特征的R反应 (“记得”)上。西方一些研究表明 ,自我参照的记忆成绩优于参照母亲的记忆。本研究以中国大学生为被试 ,... 详细信息

记忆的自我参照效应是指记忆材料与自我相联系时的记忆效果优于其它编码条件的现象 ,这种优势主要体现在以回忆经验为特征的R反应 (“记得”)上。西方一些研究表明 ,自我参照的记忆成绩优于参照母亲的记忆。本研究以中国大学生为被试 ,得到参照父亲和母亲的记忆与自我参照有同样好的成绩 ,显著优于参照名人的记忆 ,并且父母之间无差异。这支持了独立型 /依赖型自我概念模型中的东方文化下的自我概念包括父母的观点。

关键词：大学生记忆自我参照效应自我概念模型

Id2 epigenetically controls CD8^(+)T-cell exhaustion by disrupting the assembly of the Tcf3-LSD1 complex

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Cellular & Molecular Immunology 2024年第3期21卷 292-308页

作者： Yiming Li Mingwei Han Haolin Wei Wan Huang Zhinan Chen Tianjiao Zhang Meirui Qian Lin Jing Gang Nan Xiuxuan Sun Shuhui Dai Kun Wang jianli Jiang Ping zhu Liang Chen Department of Cell Biology of National Translational Science Center for Molecular Medicine and Department of Clinical Immunology of Xijing Hospital Fourth Military Medical UniversityXi’anShaanxi 710032China State Key Laboratory of New Targets Discovery and Drug Development for Major Diseases GanzhouJiangxi341000Xi’anShaanxi 710032China School of Medicine Shanghai UniversityShanghai 200444China

CD8^(+)T-cell exhaustion is a state of dysfunction that promotes tumor progression and is marked by the generation of Slamf6^(+)progenitor exhausted(Tex^(prog))and Tim-^(3+)terminally exhausted(Tex^(term))*** of DNA binding protein 2(Id2)has been shown to play important roles in T-cell development and CD8^(+)T-cell ***,the role of Id2 in CD8^(+)T-cell exhaustion is ***,we found that Id2 transcriptionally and epigenetically regulates the generation of Texprog cells and their conversion to Texterm *** deletion of Id2 dampens CD8^(+)T-cell-mediated immune responses and the maintenance of stem-like CD8^(+)T-cell subpopulations,suppresses PD-1 blockade and increases tumor ***,through its HLH domain,Id2 binds and disrupts the assembly of the Tcf3-Tal1 transcriptional regulatory complex,and thus modulates chromatin accessibility at the Slamf6 promoter by preventing the interaction of Tcf3 with the histone lysine demethylase ***,Id2 increases the abundance of the permissive H3K4me2 mark on the Tcf3-occupied E-boxes in the Slamf6 promoter,modulates chromatin accessibility at the Slamf6 promoter and epigenetically regulates the generation of Slamf6+Texprog *** LSD1 inhibitor GSK2879552 can rescue the Id2 knockout phenotype in tumor-bearing *** of LSD1 increases the abundance of Slamf6^(+)Tim-3^(−)Tex^(prog) cells in tumors and the expression level of Tcf1 in Id2-deleted CD8+T *** study demonstrates that Id2-mediated transcriptional and epigenetic modification drives hierarchical CD8^(+)T-cell exhaustion,and the mechanistic insights gained may have implications for therapeutic intervention with tumor immune evasion.

关键词： Id2 T-cell exhaustion Epigenetic modification Immune evasion