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A Comprehensive Experimental Study on Immiscible Displacements in Porous Media:Effects of Capillary Forces,Viscous Forces,Wettability and Pore Geometries

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Journal of Thermal Science 2021年第6期30卷 2137-2149页

作者： HUANG Chao DAI Xiaoye shi Changxing shi lin Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Thermal Science and Power Engineering of Ministry of Education of China Beijing 100084China Key Laboratory for C02 Utilization and Reduction Technology of Beijing Beijing 100084China Department of Mechanical and Industrial Engineering University of Illinois at ChicagoChicago 60607United States

Immiscible displacements in porous media are fundamentally significant for many natural processes and industrial *** extensive work has been done in this field,some limitations still exist due to the difficulty to cover the large number of influencing *** this paper,we present a systematic study involving the coupled influence of capillary forces,viscous forces,wetting properties and pore *** microfluidic experiments with high resolutions,both residual fluid distributions and dynamical invasion processes were clearly captured and quantitatively characterized.A void-filling behavior was identified for drainage as the capillary number Ca *** anomalous void-leaving behavior was found for the case of imbibition with an unfavorable viscosity ratio M,representing many ribbon-like regions invaded at intermediate Ca turned to be not accessible at high Ca.A pore geometry with a large typical pore-throat ratio seemed to enhance the void-leaving *** the dynamical invasion processes,an intermittency behavior was captured in the form of a fluctuation of the increasing rate of the invading saturation with *** intermittency dynamics were most evident for drainage with an unfavorable M.A pore geometry with high porosity acted to suppress the intermittency *** experimental results sketched out a full view of immiscible displacements in porous media under different conditions,and provided a complete dataset which could be used to test the rapid developing pore-scale models.

关键词： immiscible displacements porous media microfluidic experiments fluid distributions intermittency dynamics

The Studies of the Reactions of 2,4,6-Triphenylpyrylium Tetrafluoroborate with Amino Acids

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Chinese Chemical Letters 2003年第9期14卷 907-910页

作者： Shrong shi lin College of Chemical and Molecular Engineering Peking UniversityBeijing 100871

The reactions of triphenylpyrylium salt 1 with various anuno acids were explored and compared. The reactions with most α-amino acids yielded decarboxylation products 2 via decarboxylation. The reactions with glutamic acid, lysine and ACC (1-aminocyclopropyl-carboxylic acid) gave triphenylpyndine 8, dimer 9 and acid 5a-acc, respectively. The reactions with βand γ-amino acids yielded triphenylpyridine by intramolecular elinunation.

关键词： Triphenylpyrylium salt pyridinium betaine pyridinium ylid decarboxylation amino acids intramolecular elimination.

The Synthesis of Cyclic Amino Acids

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Chinese Chemical Letters 2003年第9期14卷 883-884页

作者： Shrong shi lin College of Chemical and Molecular Engineering Peking UniversityBeijing 100871

Several cyclic amino acids (1-4) were synthesized from glycine. Isocyanate ester was prepared as the key intermediate and reacted with dibromoalkanes to afford the target compounds.

关键词： Cyclic amino acid isocyanate ester dibromoalkane ion exchange resin.

Material Compatibility of Hexamethyldisiloxane as Organic Rankine Cycle Working Fluids at High Temperatures

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Journal of Thermal Science 2020年第1期29卷 25-31页

作者： DAI Xiaoye shi lin QIAN Weizhong Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China

The organic Rankine cycle(ORC)is a promising technology for industrial waste heat recovery and renewable energy *** temperature ORCs have attracted particular interest because of their high thermal efficiencies and *** material compatibility of working fluid is a significant limitation for the working fluid selection and system design for high temperature *** work presents a method for studying the material compatibility of ORC working fluids based on the calculated conditions of the ORCs and matching of components,temperatures,and ***(MM)was chosen as the test *** experimental results show that 304 stainless steel has better compatibility with MM than copper as the material of *** rubber is not a suitable sealing material for high temperature ORCs with MM as the working fluids because of the bad *** oil has better compatibility with MM than polyol ester(POE)lubricant as the lubricant for the fluid pump.

关键词： organic Rankine cycle(ORC) material compatibility high temperatures hexamethyldisiloxane(MM)

Research methods and performance analysis for the moderately high temperature refrigerant

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Science China(Technological Sciences) 2008年第8期51卷 1087-1095页

作者： shi lin ZAN Cheng Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Thermal EngineeringTsinghua UniversityBeijing 100084China

In China, directly dropping high temperature refrigerant into conventional compressor is considered as a dominant technical route for development of moderately high temperature heat pump. Based on this route, selection criteria for high temperature refrigerant were presented with consideration of several influencing factors. Moreover, a set of research methods were built including theoretical calculations and experimental tests. Four high temperature refrigerants from HTR01 to HTR04 were compared and analyzed. In results, firstly, HTR03 and HTR04 belonging to non-ozone depleting refrigerants could bring outstanding environmental benefits; secondly, the condenser outlet water efficiently generated by heat pump using high temperature refrigerants could cover 60°C–90°C;; finally, the feasibility of the technical route and the research methods were proved.

关键词： moderately high temperature refrigerant mixture heat pump environmentally friendly

葛根联合壳聚糖对高脂饲料诱导肥胖小鼠脂代谢的影响与机制研究

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辽宁中医药大学学报 2025年第1期27卷 1-6页

作者：陈凯魏平慧张欢施琳柳云恩史琳上饶师范学院江西上饶334001 上饶农业技术创新研究院江西上饶334001 沈阳农业大学辽宁沈阳110866 沈阳医学院辽宁沈阳110034

目的旨在探讨葛根乙醇提取物联合壳聚糖对肥胖小鼠脂代谢的影响。方法采用高脂饲料诱导建立C57BL/6J小鼠肥胖模型,葛根醇提物联合壳聚糖干预7周后,比较各组小鼠食物摄入量、体质量变化以及体脂情况,检测血清脂质水平、附睾脂肪垫及肝脏... 详细信息

目的旨在探讨葛根乙醇提取物联合壳聚糖对肥胖小鼠脂代谢的影响。方法采用高脂饲料诱导建立C57BL/6J小鼠肥胖模型,葛根醇提物联合壳聚糖干预7周后,比较各组小鼠食物摄入量、体质量变化以及体脂情况,检测血清脂质水平、附睾脂肪垫及肝脏脂肪重量。采用HE染色法观察肝脏和肾脏的病变情况。Western blot法检测肝组织中HMGCR、TNF-α和NF-κB蛋白表达量。结果各组小鼠食物摄入量无显著性差异,与空白对照组相比,高脂饲料的小鼠出现体质量明显增加,伴有腹部肥胖、体脂含量增多、肝脏脂肪沉积。葛根联合壳聚糖组小鼠体质量增加缓慢,体脂正常;血清总甘油三酯、总胆固醇和低密度脂蛋白胆固醇水平显著低于模型组,高密度脂蛋白胆固醇水平显著升高;葛根联合壳聚糖组小鼠肝脏未见脂肪浸润,壳聚糖组和葛根组肝脏脂肪浸润情况得到了缓解,而模型组可见明显的脂肪浸润。葛根乙醇提取物联合壳聚糖能显著降低肝组织HMGCR、TNF-α和NF-κB的表达水平(P<0.05)。结论葛根乙醇提取物联合壳聚糖可改善肥胖小鼠的脂代谢紊乱,降低血清转化酶水平和炎症因子水平,具有潜在的调节体内脂肪的功能。

关键词：葛根壳聚糖脂代谢肥胖

Review of the Working Fluid Thermal Stability for Organic Rankine Cycles

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Journal of Thermal Science 2019年第4期28卷 597-607页

作者： DAI Xiaoye shi lin QIAN Weizhong Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China

The organic Rankine cycle(ORC)is an efficient power generation technology and has been widely used for renewable energy utilization and industrial waste heat *** stability is a significant property of ORC working fluids and is the primary limitation for working fluid selection and system *** paper presents a review of the working fluid thermal stability for ORCs,including an analysis of the main theoretical method for thermal stability,a summary of the main experimental method for thermal stability,a summary of the decomposition experimental results for working fluids,and a discussion of the decomposition influence on ORC *** research trends of thermal stability are also discussed in this paper.

关键词： organic Rankine cycle(ORC) working fluid thermal stability

Zero-forcing beamforming with receiver antenna selection in downlink multi-antenna multi-user system

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Journal of Systems Engineering and Electronics 2008年第6期19卷 1258-1263页

作者： Huang Senhua Qiu ling shi lin PCN & SS Lab Univ. of Science and Technology of China Hefei 230027 P. R. China

A study on the zero-forcing beamforming （ZFBF） scheme with antenna selection at user terminals in downlink multi-antenna multi-user systems is presented. Simulation results show that the proposed ZFBF scheme with receiver antenna selection （ZFBF-AS） achieves considerable throughput improvement over the ZFBF scheme with single receiver antenna. The results also show that, with multi-user diversity, the ZFBF-AS scheme approaches the throughput performance of the ZFBF scheme using all receiver antennas （ZFBF-WO-AS） when the base station adopts semi-orthogonal user selection （SUS） algorithm, and achieves larger throughput when the base station adopts the Round-robin scheduling algorithm. Compared with ZFBF-WO-AS, the proposed ZFBF-AS scheme can reduce the cost of user equipments and the channel state information requirement at the transmitter （CSIT） as well as the multiuser scheduling complexity at the transmitter.

关键词： downlink multi-antenna multi-user system zero-forcing beamforming antenna selection throughput performance

ITPK1 functions as both a kinase and an ADP phosphotransferase in Pi signaling

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Molecular Plant 2021年第11期14卷 1784-1785页

作者： Chun-lin shi ANGENOVO 1414 VikenNorway College of Horticulture South China Agricultural UniversityGuangzhou 510642China

Phosphorus is one of mineral elements essential for plant growth and *** cope with low phosphate(Pi)conditions,plants have evolved complex signaling mechanisms including the inositol phosphate(InsP)signaling pathway in which the phosphate starvation response(PHR)transcription factors control the expression of Pi starvation-induced genes in a Pi-dependent *** activities of PHRs are regulated by their interactions with SPX proteins that act as receptors for inositol pyrophosphates(PP-lnsPs),such as lnsP7 and *** plants,the syn thesis of lnsP8 is mediated by the bifunctional kinase/phosphatase enzymes,VIH1 and ***,lnsP6 kinases responsible for the synthesis of lnsP7 in plants have long remained elusive.

关键词： development. ITP synthesis