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Numerical Investigation on Heat Transfer Characteristics of Microencapsulated Phase Change Material Slurry in a Rectangular Minichannel

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Journal of Thermal Science 2024年第2期33卷 564-577页

作者： WANG Zhibin li zilong JIA lisi DING Bin CHEN Ying School of Materials and Energy Guangdong University of TechnologyGuangzhou510006China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangzhou510006China College of New Energy China University of Petroleum(East China)Qingdao266580China

Microencapsulation phase change material slurry(MEPCMS) becomes a potential working fluid for cooling high energy density miniaturized components,thanks to the latent heat absorption of particles in the heat transfer *** this work,the Discrete Phase Model(DPM) based on the Euler-Lagrangian method is used to numerically investigate the convective heat transfer characteristics of MEPCMS flowing through a rectangular minichannel with constant heat *** results show that particles of MEPCMS are mainly subjected to drag force during the *** so,they can migrate from the high-temperature region to the low-temperature region driven by the thermophoretic force,affecting the particle distribution and phase change ***,the Nux of the MEPCMS fluctuates due to particle phase change with varying specific heat ***,the value increases first,then decreases,and eventually increases again until it approaches the fully developed value of the pure base fluid as the particles gradually ***,the heat transfer performance of the MEPCMS is influenced by the combination of fluid inlet temperature fluid inlet velocity(v),and mass concentration(c_(m)) of MEPCM *** result shows that the maximum reduction of the maximum bottom wall temperature difference(ΔT_(w)) is 23.98% at T_(in)=293.15 K,v=0.15 m·s^(-1),c_(m)=10%.

关键词： Microencapsulated Phase Change Material Slurry(MPCMS) Discrete Phase Model(DPM) particle-fluid interaction force minichannel heat sink thermophoresis

Phosphatidic acid-enabled MKL1 contributes to liver regeneration:Translational implication in liver failure

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Acta Pharmaceutica Sinica B 2024年第1期14卷 256-272页

作者： Jiawen Zhou Xinyue Sun Xuelian Chen Huimin liu Xiulian Miao Yan Guo Zhiwen Fan Jie li Yong Xu zilong li State Key Laboratory of Natural Medicines Department of PharmacologyChina Pharmaceutical UniversityNanjing 211198China Institute of Biomedical Research Liaocheng UniversityLiaocheng 252200China Department of Pathology Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China Department of Infectious Diseases Nanjing Drum Tower Hospital Affiliated with Nanjing University Medical SchoolNanjing 210008China Institute of Viruses and Infectious Diseases Nanjing UniversityNanjing 210008China

liver regeneration following injury aids the restoration of liver mass and the recovery of liver *** the present study we investigated the contribution of megakaryocytic leukemia 1(MKL1),a transcriptional modulator,to liver *** report that both MKL1 expression and its nuclear translocation correlated with hepatocyte proliferation in cell and animal models of liver regeneration and in liver failure *** with MKL1 deletion exhibited defective regenerative response in the *** analysis revealed that MKL1 interacted with E2F1 to program pro-regenerative ***2 mediated phosphorylation primed MKL1 for its interaction with *** interest,phospholipase d2 promoted MKL1 nuclear accumulation and liver regeneration by catalyzing production of phosphatidic acid(PA).PA administration stimulated hepatocyte proliferation and enhanced survival in a MKL1-dependent manner in a pre-clinical model of liver ***,PA levels was detected to be positively correlated with expression of pro-regenerative genes and inversely correlated with liver injury in liver failure *** conclusion,our data reveal a novel mechanism whereby MKL1 contributes to liver *** for small-molecule compounds boosting MKL1 activity may be considered as a reasonable approach to treat acute liver failure.

关键词： liver failure liver regeneration Transcription regulation Transcription factor Hepatocytes Phosphatidic acid Phospholipase d2 Translational medicine

Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay,China,since the Late Pleistocene

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Journal of Oceanology and limnology 2024年第3期42卷 772-786页

作者： Dongqin HUANG Xiaolong li zilong li Pei Sun LOH Jianxiong HU Jianfang CHEN Yuan-Pin CHANG Chin-Wen YANG Qin GAO Institute of Marine Geology and Resources Ocean CollegeZhejiang UniversityZhoushan 316021China Ministry of Water Resources of the People’s Republic of China Beijing 100054China Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Department of Oceanography Sun Yat-sen UniversityKaohsiung 80424China

A sediment core(YJK19-02)collected from the southern outlet of Hangzhou Bay near the Yongjiang River estuary in East China was analyzed for grain size,lignin,bulk elemental composition,stable carbon isotope,and rare earth elements(REEs)to determine the sources and diagenesis of sedimentary organic matter(OM)of the estuary and adjacent areas since the Late Pleistocene.δ^(13)C values(-24.80‰–-23.60‰),total organic carbon/total nitrogen(TOC/TN)molar ratios(8.00–12.14),and light rare earth element/heavy rare earth element ratios(LREE/HREE=8.34–8.91)revealed the predominance of terrestrial sources of OM,mainly from the Changjiang(Yangtze)*** lignin parameters of syringyl/vanillyl(S/V=0.20–0.73)and cinnamyl/vanillyl(C/V=0.03–0.19)ratios indicate the predominance of nonwoody angiosperms,and the vanillic acid/vanillin ratios[(Ad/Al)_(V)=0.32–1.57]indicate medium to high degrees of lignin *** increasing trend ofΛ(total lignin in mg/100-mg OC)values from ca.14500 a BP to ca.11000 a BP reflected the increase in temperature during the Late ***,a time lag effect of temperature on vegetation abundance was also *** relatively higher and stableΛvalues correspond to the higher temperature during the mid-Holocene from ca.8500 a BP to ca.4500 a BP.Λvalues decreased from ca.4000 a BP to the present,corresponding to historical temperature fluctuations during this *** results show that the vegetation abundance in the Yongjiang River Basin since the Late Pleistocene was related to the temperature fluctuation duo to climate change.

关键词： Yongjiang River estuary sedimentary organic matter lignin environmental change Late Pleistocene

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检察听证的二元功能与程序优化

暨南学报（哲学社会科学版） 2024年第6期46卷 58-70页

作者：李子龙北京工商大学法学院清华大学中国司法研究中心(最高人民检察院司法案例研究基地)

检察听证作为新时期检察办案的重要组成部分,能够有效地实现诉源治理的目标。检察听证不仅帮助检察官解决案件争议点确保检察决定的准确与公正,而且通过释法说理起到息诉罢访的作用,兼具内部与外部二元功能。我国实践中检察听证功能存... 详细信息

检察听证作为新时期检察办案的重要组成部分,能够有效地实现诉源治理的目标。检察听证不仅帮助检察官解决案件争议点确保检察决定的准确与公正,而且通过释法说理起到息诉罢访的作用,兼具内部与外部二元功能。我国实践中检察听证功能存在优化的空间,检察听证在听证案件的适用,听证人员的构成以及论证说理等程序运行方面弱化了程序功能。优化检察听证程序需以二元功能为导向,规范听证案件范围提高听证质量,借由听证组成人员的对向性结构实现“听”与“证”的有效互动,繁简有序地充实论证说理内容避免程序形式化。

关键词：检察听证内部功能外部功能诉源治理

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基于综合干旱指数的伊犁河流域干旱多变量概率特征研究

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干旱地区农业研究 2024年第4期42卷 249-261页

作者：李子龙穆振侠新疆农业大学水利与土木工程学院新疆乌鲁木齐830052 新疆水利工程安全与水灾害防治重点实验室新疆乌鲁木齐830052

基于D-Vine-Copula函数,联合降水和VIC模型模拟的蒸散发、径流和土壤水等要素,构建了一种能表征气象-水文-农业干旱特征的新型综合干旱指数SWCI,以伊犁河流域为研究区,分析干旱多属性概率特征及其空间分布规律,以期为干旱区划及旱灾风... 详细信息

基于D-Vine-Copula函数,联合降水和VIC模型模拟的蒸散发、径流和土壤水等要素,构建了一种能表征气象-水文-农业干旱特征的新型综合干旱指数SWCI,以伊犁河流域为研究区,分析干旱多属性概率特征及其空间分布规律,以期为干旱区划及旱灾风险评估提供科学依据。结果表明:(1)构建的SWCI指数能很好地捕捉到不同类型干旱特征,具有较好的适用性;(2)1960—2010年,伊犁河谷东部共经历了43次干旱事件,干旱发生频率较高但程度较轻;河谷西部和南部山区分别发生干旱事件38、39次,干旱频率较河谷东部低但旱情偏重;(3)各区域多维干旱联合概率与干旱历时、烈度、峰值呈负相关关系,表明干旱历时、烈度和峰值越大,综合干旱发生的概率越小;(4)从二元条件概率可知,干旱历时(干旱烈度)的条件概率随干旱烈度(干旱历时)的增加而增大,但当干旱烈度(干旱历时)为某一固定值时,随着干旱历时(干旱烈度)逐渐增加,干旱烈度(干旱历时)的条件概率逐渐减小。(5)研究区的干旱高风险区主要集中在河谷西部和南部山区,其他区域为低风险区。

关键词：综合干旱指数 D-Vine-Copula函数联合概率空间分布伊犁河流域

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基于低复杂度加法网络的非正交多址接入短报文多用户检测算法研究

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电子与信息学报 2024年第6期46卷 2409-2417页

作者：王骥李子龙肖健李涣哲谢文武余超华中师范大学物理科学与技术学院湖北武汉430079 湖南理工学院信息科学与工程学院湖南岳阳414006

针对非正交多址接入(NOMA)系统中,接收机使用串行干扰删除算法译码时需要已知干扰用户的调制方式而产生额外的信令开销问题,该文提出一种基于联合星座轨迹图和深度学习的NOMA短包传输干扰用户调制方式盲检测算法。考虑在通信设备部署神... 详细信息

针对非正交多址接入(NOMA)系统中,接收机使用串行干扰删除算法译码时需要已知干扰用户的调制方式而产生额外的信令开销问题,该文提出一种基于联合星座轨迹图和深度学习的NOMA短包传输干扰用户调制方式盲检测算法。考虑在通信设备部署神经网络时存在计算复杂度高和能量消耗大等不足,将原始卷积神经网络替换为深度加法网络,在调制检测准确率,计算延迟和能耗等方面进行了充分比较,使用时域过采样技术改善低信噪比下的识别率。最后分析并验证了功率分配,数据包长度对检测性能的影响。

关键词：非正交多址接入调制检测深度加法网络过采样

大数据环境下管理信息系统发展困境与优化策略

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办公自动化 2024年第4期29卷 15-17页

作者：李子龙李颜兴濮阳职业技术学院濮阳457000

信息产业在大数据技术日益兴盛的条件下第三次革命。与此同时,物联网技术、信息管理等区域也随之发生了翻天覆地的变化,人们逐步走进信息化、智能化的工作与生活。大数据技术作为管理信息系统的应用基础,其在应用上仍然存在许多未解难... 详细信息

信息产业在大数据技术日益兴盛的条件下第三次革命。与此同时,物联网技术、信息管理等区域也随之发生了翻天覆地的变化,人们逐步走进信息化、智能化的工作与生活。大数据技术作为管理信息系统的应用基础,其在应用上仍然存在许多未解难题。文章在大数据环境下的特点,主要针对管理信息系统发展过程中的困境展开讨论,分析了大数据环境下管理信息系统发展的优化策略,网络和计算机的不断普及,将我们的社会环境带到了大数据时代。数据库技术以互联网为主要载体,将各种数据信息经过筛选、整理、总结、计算,逐步改变着人们的生产和生活习惯。因此,在大数据的背景下,信息处理的精细化和高效化已成为一项重要的技术,促进对信息管理的不断发展提供借鉴。

关键词：大数据环境管理信息系统优化策略

Algebra matrix and similarity classification of operators

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Science China Mathematics 2006年第3期49卷 398-409页

作者： ZHANG zilong li Yucheng Department of Mathematics Hebei Normal University Shijiazhuang 050016 China Department of Mathematics Hebei Normal University Shijiazhuang 050016 China

In this paper, by the Gelfand representation theory and the Silov idempotents theorem, we first obtain a central decomposition theorem related to a unital semi-simple nhomogeneous Banach algebra, and then give a simil... 详细信息

关键词： algebra matrix, abelian idempotents, Cowen-Douglas operator, Silov idem-potents theorem.

基于相变微胶囊悬浮液的芯片阵列冷却特性研究

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化工学报 2024年第7期75卷 2455-2464,F0002页

作者：方立昌李梓龙陈博苏政贾莉斯王智彬陈颖广东工业大学材料与能源学院广东省功能软凝聚态物质重点实验室广东广州510006

针对传统离散相模型(DPM)由于未考虑颗粒体积影响导致无法准确预测相变微胶囊悬浮液(MEPCMS)的压降,采用修正DPM模型,准确预测MEPCMS在芯片阵列中的流动传热特性,考察芯片发热功率及功率分布对冷却特性的影响规律。结果表明,MEPCMS相比... 详细信息

针对传统离散相模型(DPM)由于未考虑颗粒体积影响导致无法准确预测相变微胶囊悬浮液(MEPCMS)的压降,采用修正DPM模型,准确预测MEPCMS在芯片阵列中的流动传热特性,考察芯片发热功率及功率分布对冷却特性的影响规律。结果表明,MEPCMS相比于纯基液,平均Nusselt数Nu_(av)最高可提升30.03%,壁面温升ΔT_(w)最高可降低7.19%,综合性能评价因子η均大于1;芯片功率越高越靠近出口,悬浮液冷却效果提升越明显,高功率芯片靠近进口有利于抑制芯片的最高温升,靠近出口时悬浮液Nu_(av)的增幅大于摩擦因子和进出口压降的增幅,可见其受发热功率的影响较小,受功率分布的影响较大。为MEPCMS在细小通道内流动传热特性的认识及在电子器件热管理方面的应用提供参考。

关键词：相变微胶囊悬浮液微通道芯片阵列热管理颗粒流数值模拟

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