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Visualisation and Heat Transfer Performance of Mini-Channel Flat Heat Pipe with a Binary Mixture

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Journal of Thermal Science 2024年第5期33卷 1712-1725页

作者： FAN Gaoting tang Aikun CAI Tao SHAN Chunxian pan Jun JIN Yi School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China Jiangsu Jinhe Energy Technology Co.Ltd Zhenjiang 212400China

To unravel the intricacies of two-phase gas-liquid flow characteristics and heat transfer behavior,an array mini-channel gravity plate heat pipe(AMGPHP)is proposed in this work,which allows for observing the internal changes in the state of the working *** flow patterns such as pool flow,columnar flow,and slug flow,are experimentally explored and analyzed in *** is found that the optimal volume fill ratio is 20%by utilizing start-up time and thermal resistance as performance evaluation *** this fill ratio,a medium optimization strategy by blending ethanol within R141b is proposed and *** comparison to pure working fluids,the heat transfer performance of AMGFHP in the binary fluid has been significantly augmented due to temperature and concentration shifts resulting from disparate boiling *** the 10%volume fraction ethanol blending condition,the equivalent thermal conductivity of the heat pipe is dramatically elevated,with a value of 3110 W/(m·℃),along with the reduction of the minimum start-up power to 4 *** general,applying such a medium to heat pipes has considerable potential in practical applications.

关键词： flat heat pipe mini-channel visualisation two-phase flow binary mixtures thermal performance

Ensemble projections of climate and streamflow in a typical basin of semi-arid steppes in Mongolian Plateau of 2021-2100

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Advances in Climate Change Research 2024年第2期15卷 230-243页

作者： Hang pan Jian-Ping tang Liang CHENG Man-Chun LI Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Key Laboratory of Mesoscale Severe Weather/Ministry of Education Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China

The Kherlen River is the main water source for Hulun Lake,the largest lake in northern *** to reduced inflow from the Kherlen River,Hulun Lake experienced rapid shrinkage at the beginning of the 21st century,posing a serious threat to the ecological security of northern ***,there is still a significant lack of projections regarding future climate change and its hydrological response in the Kherlen River *** study analyzed the projected climate and streamflow changes in the Kherlen River basin,a vital yet vulnerable international semi-arid steppes type basin.A combination of multi-model ensemble projection techniques,and the soil and water assessment tool(SWAT)model was employed to examine the spatio-temporal changes in precipitation,temperature,streamflow,and the associated uncertainties in the *** temperature(an increase of 1.84-6.42℃)and the precipitation(an increase of 15.0-46.0 mm)of Kherlen River basin are projected to increase by 2100,leading to a rise in streamflow(1.08-4.78 m^(3) s^(-1)).The upstream of the Kherlen River exhibits remarkable increasing trends in precipitation,which has a dominant influence on streamflow of Kherlen *** increases in streamflow are observed in April,August,September,and October compared to the reference period(1971-2000).These findings suggest a partial alleviation of water scarcity in the Kherlen River,but also an increased likelihood of hydrological extreme *** projected temperature increase in the Kherlen River basin exhibits the smallest uncertainty,while more pronounced uncertainties are found in precipitation and *** spread among the results of CMIP6 models is greater than that of CMIP5 models,with lower signal-to-noise ratio(SNR)values for temperature,precipitation,and streamflow.

关键词： Climate change Flow projection Uncertainty SWAT Mongolian Plateau

How Does Stacking Pressure Affect the Performance of Solid Electrolytes and All-Solid-State Lithium Metal Batteries?

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Energy & Environmental Materials 2024年第4期7卷 93-98页

作者： Junwu Sang Bin tang Yong Qiu Yongzheng Fang Kecheng pan Zhen Zhou Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2) School of Chemical Engineering Zhengzhou University

All-solid-state lithium metal batteries (ASSLMBs) with solid electrolytes (SEs)have emerged as a promising alternative to liquid electrolyte-based Li-ion batteries due to their higher energy density and ***,since ASSLMBs lack the wetting properties of liquid electrolytes,they require stacking pressure to prevent contact loss between electrodes and SEs.

关键词： critical current density solid electrolyte solid-state lithium metal batteries stacking pressure

Microstructure and Mechanical Property of the Large Cross-Sectioned Mg-Gd-Y-Zn-Zr Alloy Produced by Small Extrusion Ratio

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 999-1006页

作者： Sen Wang Hucheng pan Caixia Jiang Zhihao Zeng Zhen pan Weineng tang Chubin Yang Yuping Ren Gaowu Qin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) College of Materials Science and EngineeringNortheastern UniversityShenyang110819China Mg and Mg Alloy Institute Technology CenterBaosteel Metal Co.LtdChina Baowu Steel GroupShanghai200940China Jiangxi Provincial Engineering Research Center for Magnesium Alloy Gannan Normal UniversityGanzhou341000China

In this work,the microstructure and mechanical properties of large cross-sectioned Mg-9Gd-3Y-1.2Zn-0.5Zr(VWZ931)samples produced by the small extrusion ratio has been *** as-extruded VWZ931 sample with diameter of~30 mm can exhibit the high yield strength(YS)of 339 MPa,ultimate tensile strength(UTS)of 387 MPa and elongation of 8.2%,*** peak-aged,the YS and UTS of the Mg samples were significantly increased to 435 MPa and 467 *** small extrusion ratio leads to the low fraction of dynamic recrystallized(DRX)grains in VWZ931 sample,and the texture hardening effect can be fully utilized to achieve high *** combined effect of precipitation strengthening due to the long-period stacking ordered phases and theβ′phase,grain boundary strengthening due to the fine DRX grains,heterogeneous deformation-induced strengthening caused by bimodal microstructure,can together contribute to the high strength of present Mg *** findings can shed light on designing other large-sized Mg wrought alloys with high mechanical performance.

关键词： Mg-RE alloy Mechanical property Bimodal grains Texture hardening

西藏甲玛铜多金属矿电气石矿物学特征及其对热液流体演化的指示

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中国地质 2024年第4期51卷 1123-1138页

作者：唐攀唐菊兴林彬李发桥孙渺祁婧崔浩王梦蝶熊妍傅渊慧张忠坤杨征坤姚晓峰谢金玲陶刚杨欢欢西南科技大学环境与资源学院固体废物处理与资源化教育部重点实验室四川绵阳621010 中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 中国地质大学(北京) 北京100083 成都理工大学四川成都610059 西藏华泰龙矿业开发有限公司西藏拉萨850212 中国地质调查局发展研究中心北京100037 西藏大学西藏拉萨850000

【研究目的】角岩作为甲玛超大型斑岩铜多金属成矿系统的重要组成部分,既是成矿热液的岩性圈闭,也是重要的赋矿围岩,但角岩中的电气石成因不明,对于进一步理解成矿过程有一定制约。【研究方法】本文通过详细的钻孔编录、镜下鉴定和电子... 详细信息

【研究目的】角岩作为甲玛超大型斑岩铜多金属成矿系统的重要组成部分,既是成矿热液的岩性圈闭,也是重要的赋矿围岩,但角岩中的电气石成因不明,对于进一步理解成矿过程有一定制约。【研究方法】本文通过详细的钻孔编录、镜下鉴定和电子探针分析,研究电气石的成因,并探讨其对岩浆热液流体演化过程的启示。【研究结果】电气石在甲玛角岩中较为发育,依据其产状可分为4类:Tur-I,热液角砾岩胶结物中的电气石;Tur-Ⅱ,石英+电气石±黄铁矿脉;Tur-Ⅲ,电气石±黄铁矿±黄铜矿脉;Tur-Ⅳ,团斑状电气石±黄铁矿;其中前3类电气石较发育环带结构。不同产状电气石均具有较为宽泛的Al_(2)O_(3)、Fe/(Fe+Mg)和Na/(Na+Ca)比值,属于碱基亚类镁电气石和黑电气石,替代机制为^(X)□Al(NaMg)_(-1)、Fe^(2+)Mg_(-1)和Fe^(3+)Al_(-1)。【结论】不同产状电气石发育复杂的环带结构,且成分变化极大,表明其是岩浆热液流体和地层流体不同程度混合造成的,且岩浆热液流体与还原性的角岩地层发生的水岩反应可能在甲玛成矿过程中起了重要作用。甲玛不同产状电气石的结构和成分信息记录了岩浆热液演化过程的细节信息,为完善成矿过程提供了重要证据。

关键词：电气石岩浆热液演化斑岩成矿系统甲玛铜多金属矿冈底斯成矿带矿产勘查工程西藏

Decomposition of the Coarse Primary Carbides in the M2 High Speed Steels Containing Silicon

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稀有金属材料与工程 2011年第S3期40卷 38-42页

作者： Wang Weiqing, pan Fusheng, tang Aitao, Liu Tingting, Liu Shengming, Luo Suqin Chongqing University, Chongqing 400030, China Chongqing Univ Coll Mat Sci & Engn Chongqing 400030 Peoples R China

The carbides of high speed steels have a determinant influence on their properties, and the control of the carbides has been a hot topic in development of high speed steels. The decomposition of the coarse primary M2C carbide in the as-cast M2 high speed steels with Silicon addition and without Silicon addition was investigated by using optical microscope, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction analysis. Both the M2 high speed steel and the M2-1Si steel were heated at 1000 and 1150 ℃, the soaking time were 15 min, 30 min, 1 h, 2 h and 4 h, respectively. The results showed that the decomposition of M2C carbides to M6C and MC carbides occurred during heating at 1000 ℃,the degree of the decomposition became obvious with the increase of heating time or addition of silicon. After the tested steels were heated at 1000 ℃ for 1 h, the primary M2C carbides in the M2-1Si steel had decomposed into M6C and MC completely, but the decomposition of the primary M2C carbides in the M2 steel was incomplete. Silicon addition was found to accelerate the decomposition of the coarse primary M2C carbides during heating and to inhibit the growth and coarseness of the decomposition products.

关键词： M2 high speed steels carbides silicon decomposition

Laser speckle contrast imaging to predict the effect of temporary spinal cord stimulation in postherpetic neuralgia patients: A prospective observational study

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Journal of Innovative Optical Health Sciences 2024年第1期17卷 69-75页

作者： Xiang Huang Dacheng tang pan Chen Lumiao Chen Xiaohong Li Xiaoping Wang Department of Pain Management The First A±liated Hospital Jinan University Guang ZhouGuangdong 510630P.R.China Department of Pain Management The First People's Hospital of Foshan Foshan City Guangdong 528000P.R.China

Temporary spinal cord stimulation(tSCS)can effectively reduce the pain and severity of postherpetic neuralgia(PHN).However,there are no effective and objective methods for predicting the effects of tSCS on *** speckle contrast imaging(LSCI)is frequently used in neurology to evaluate the effectiveness of *** assess the accuracy of LSCI in predicting the impact of tSCS on PHN,14 adult patients receiving tSCS treatments for spinal nerve-innervated(C6-T2)PHN participated in this observational *** analog scale(VAS)assessments and LSCI bloodflow images of the-ngers were recorded after the tSCS *** results showed that the VAS scores of all patients decreased ***,the bloodflow index(BFI)values were signi-cantly higher than they were before the *** bloodflow and pain alleviation were positively ***-ndings indicated that spinal nerve PHN(C6-T2)was signi-cantly reduced by *** alleviation by tSCS was positively correlated with increased bloodflow in the *** effect of tSCS on PHN may thus be predicted using an independent and consistent indicator such as LSCI.

关键词： Laser speckle contrast imaging temporary spinal cord stimulation postherpetic neuralgia

Response and assembly of abundant and rare taxa in Zaopei under different combination patterns of Daqu and pit mud:from microbial ecology to Baijiu brewing microecosystem

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Food Science and Human Wellness 2024年第3期13卷 1439-1452页

作者： Yu Mu Jun Huang Rongqing Zhou Suyi Zhang Hui Qin Hanlan tang Qianglin pan Huifang tang College of Biomass Science and Engineering Sichuan UniversityChengdu 610065China National Engineering Research Center of Solid-State Manufacturing Luzhou 646000China Luzhou Laojiao Co. Ltd.Luzhou 646699China

The quality and aroma of strong-flavor Baijiu are mainly dependent on Daqu,pit mud(PM),and the interaction of ***,little is known about how their combination patterns affect the microbiome and metabolome of Zaopei,especially the metabolic function of rare ***,an experiment on industrial size was designed to assess the effects of 6 combinations(3 kinds of Daqu×2 kinds of PM)on the composition and assembly of different taxa,as well as the flavor *** results showed that Zaopei's microbiota was composed of a few abundant taxa and enormous rare taxa,and rare bacterial and abundant fungal subcommunities were significantly affected by combination *** assembly processes of abundant/rare taxa and bacterial/fungal communities were distinct,and environmental changes mediated the balance between stochastic and deterministic processes in rare bacteria ***,specific combination patterns improved the flavor quality of Zaopei by enhancing the interspecies interaction,which was closely related to rare taxa,especially rare *** findings highlighted that rare bacteria might be the keystone in involving community interaction and maintaining metabolic function,which provided a scientific foundation for better understanding and regulating the brewing microbiota from the viewpoint of microbial ecology.

关键词： Bioaugmented Daqu Artificial pit mud Abundant and rare taxa Community assembly Metabolic function

Mottled dolomite in the lower Cambrian Longwangmiao formation in the Northern Sichuan Basin, South China

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Petroleum 2024年第1期10卷 19-29页

作者： Xuefei Yang Hao tang Junyi Zhang Yao Du Ruifeng tang Shuang pan Xiang Zhou Yan Xu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Sichuan Provincial Key Laboratory of Gas Geology Southwest Petroleum University CCDC Chuandong Drilling Company Exploration Department Petrochina Southwest Oil& Gasfield Company

At the end of Early Cambrian time, the Sichuan basin（South China） was located in a wide carbonate platform, with hundreds of meters of carbonate deposited. The Longwangmiao Formation carbonate in Sichuan basin is partially to completely dolomitized, displaying a mottled texture in the northern area of the exposure. The mottled dolomitic limestone developed parallel to bedding, with shape irregular boundaries with limestone that has not been dolomitized. The mottled dolomite is composed of powder crystalline and finely crystalline dolomite, while the matrix limestone is composed of micritic calcite. the isotopic composition of mottled dolomite(δ13C = +0.29‰PDB, δ18O =-1.15‰PDB) is similar to that of micrite calcite(δ13C =-0.49‰PDB, δ18O =-1.45‰PDB). Both isotopic values and trace element data indicate that the dolomitized fluid is originated from sea water. Some beds contain gypsum pseudomorphs and mud cracks, indicating a shallow and evaporative environment with local high salinity during deposition. Dolomitization likely took place early, in part as a result of sea water salinity concentration. Trace fossils thalassinoides horizontalis, thalassinoides callianassa and planolites developed in the Longwangmiao Formation, and the sharp edges of mottled dolomite are similar to these trace fossils. The beds are intensely bioturbated. In the burrow network, the sediments and burrow fill were coarse and loose with little clay, and it is interpreted here as being easier to be dolomitized than the surrounding *** dolomitization is thus interpreted to have occurred in the burrow system, and the degree of dolomitization was related to the degree of bioturbation, which is controlled by the trace-making creatures.

关键词： Mottled dolomite Dolomitization Longwangmiao Formation Early Cambrian Northern Sichuan basin