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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 877-886页

作者： Qiuhong liu qing Du Xiaobin Zhang Yuan Wu Andrey A.Rempel Xiangyang Peng Xiongjun liu Hui Wang Wenli Song Zhaoping lü Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences Ekaterinburg 620016Russia China Nuclear Power Technology Research Institute Co.ltd. Shenzhen 518000China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China

Short-range ordering(SRO)is one of the most important structural features of high entropy alloys(HEAs).However,the chemical and structural analyses of SROs are very difficult due to their small size,complexed compositions,and varied *** electron microscopy(TEM)as well as its aberration correction techniques are powerful for characterizing SROs in these compositionally complex *** this short communication,we summarized recent progresses regarding characterization of SROs using TEM in the field of *** using advanced TEM techniques,not only the existence of SROs was confirmed,but also the effect of SROs on the deformation mechanism was ***,the perspective related to application of TEM techniques in HEAs are also discussed.

关键词： high entropy alloys transmission electron microscopy short-range ordering deformation mechanisms

Numerical Study on local Flow and Heat Transfer Characteristics of Supercritical CO_(2) in PCHE with Sinusoidal Channels

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Journal of Thermal Science 2024年第1期33卷 41-55页

作者： WENZhexi lV Yigao lI qing WU Jinglin School of Energy Science and Engineering Central South UniversityChangsha 410083China

local heat transfer and flow characteristics,which is crucial to the overall performance of supercritical CO_(2) recuperators,is rarely examined in details in reported *** this paper,the local heat transfer and flow characteristics of supercritical CO_(2) in sinusoidal channel printed circuit heat exchangers are numerically investigated under the working conditions of *** on the simplified physical model constituted by10 pitches,the variations of Re,heat flux,Nu,secondary flow and other relevant parameters along the flow direction are analyzed *** is further made between the high and low temperature recuperators(HTR and lTR).It's observed that the local heat transfer and flow characteristics vary greatly from the inlet to the outlet,especially in the *** of 127.5% and 61.7% can be observed on the cold side of the lTR for Re and heat transfer coefficient h, *** indicate that the temperature difference and heat transfer coefficient h should not be regarded as constant and the distribution of h should be carefully considered in the design of the *** complicated interactions among the varying thermophysical properties,buoyancy and the periodically changed centrifugal force are believed to be the key that shapes the flow ***,the changes of the wavy angle θ are found to have greater influence than the changes of mass flow rate in reshaping the flow field when θ>25°.Though gravity direction strongly affects the local heat transfer and flow characteristics,it's also found that the effects on the overall thermal-hydraulic performance are relatively *** the installation direction that yields a_y=g should better be avoided for the sinusoidal channel printed circuit heat exchanger.

关键词： printed circuit heat exchanger supercritical CO_(2) sinusoidal channel heat transfer recuperator

利益相关者共同参与的民族地区家庭旅馆经营及管理模式研究

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思想战线 2007年第5期33卷 35-42页

作者：吕宛青云南大学工商管理与旅游管理学院云南昆明650091

从泸沽湖家庭旅馆产生发展的历程不难看出,社会的转型势必带来社会群体利益结构的变化,不同的利益相关者有着不同的利益诉求,如果这些利益不能实现均衡或相对均衡,由利益相关者引发的矛盾和冲突就将在很大程度上影响到社会经济的可持续... 详细信息

从泸沽湖家庭旅馆产生发展的历程不难看出,社会的转型势必带来社会群体利益结构的变化,不同的利益相关者有着不同的利益诉求,如果这些利益不能实现均衡或相对均衡,由利益相关者引发的矛盾和冲突就将在很大程度上影响到社会经济的可持续发展。实现利益均衡是构建旅游目的地和谐社会的本质要求,妥善协调与正确解决利益均衡过程中出现的矛盾和冲突,才能最大限度地解决利益相关者的利益诉求问题,有助于家庭旅馆走上规范、合理、有序的发展道路,提高民族地区旅游目的地社会和谐程度。

关键词：利益相关者共同参与经营管理模式

基于旅游产业视角的文化变迁主源构成及其解读——以纳西族集聚地丽江市为例

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思想战线 2008年第6期34卷 60-65页

作者：吕宛青云南大学工商管理与旅游管理学院

相互交织在一起的多重文化构成了极其复杂的变迁合力,成为丽江文化变迁的推动力。从旅游产业角度把引起文化变迁的主源因素剥离出来,有助于准确地认识引起旅游产业文化变迁的多重性原因。

关键词：旅游产业文化变迁合力主源构成

Counting Formulas for Restricted Matrix of Set

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Chinese Quarterly Journal of Mathematics 2009年第2期24卷 168-172页

作者： l U qing-lin School of Mathematical Science Xuzhou Normal University Xuzhou 221116 China

In this paper, we consider the counting problem of matrix of set （Aij）kxn which satisfies Ui=1^k Uj=1 ^n Aij={α1,α2,…αm} and other conditions, and obtain some computational formulas which extend all the results... 详细信息

关键词： counting matrix of set exponential generating function

Selective photosynthesis of imines from biomass-derived aldehydes over Ni/TiO_(2)

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Rare Metals 2024年第3期43卷 1116-1124页

作者： Wu-lin li qing-qing Zhang lin Dong Wen-Jun Zhang li-li lin Zu-Peng Chen Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing210037China Institute of Industrial Catalysis State Key Laboratory of Green Chemistry Synthesis TechnologyCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou310014China

Photocatalytic reductive amination of biomass-derived aldehydes is a desirable way to selectively upgrade biomass into value-added nitrogen-containing chemicals under mild ***,it is challenging to produce imines in high selectivity because of the undesirable side reactions caused by the activity of functional ***,we demonstrate the highly reactive and selective production of imines from biomass derived aldehydes via the photocatalytic reductive amination,using a defective TiO_(2)supported nickel *** employment of methanol as the hydrogen donor and ammonia solution as the nitrogen source avoids the use of high-pressure H_(2)and expensive amines,rendering the current catalytic process safe,economical,and environmentally *** depth investigations attribute the improved separation and transfer of photogenerated charge carriers to the presence of oxygen vacancies and decorated Ni nanoparticles,thereby accelerating the production of imines from benzaldehyde amination(conversion,95.8%;seleetivity,95.2%).Furthermore,the developed system could be easily translated to the photocatalytic conversions of various biomass derived aldehydes,which provided an example of a cost-effective and sustainable approach for the valorization of biomass derived feedstocks.

关键词： Photocatalysis Biomass derivatives Imines Reduction amination Heterogeneous catalyst

Applications of mercury stable isotopes for tracing volcanism in the geologic record

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Science China Earth Sciences 2024年第5期67卷 1436-1458页

作者： qing GONG Ming-Xing lING Wang ZHENG State Key laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China School of Earth System Science Institute of Surface-Earth System ScienceTianjin UniversityTianjin 300072China

Mercury(Hg)enrichments in ancient sediments have been used as a proxy of volcanism,especially large igneous province(lIP)***,considering the existence of other potential Hg sources besides volcanoes and the diverse factors(e.g.,organic matters,clay minerals,sulfide minerals and Fe oxides)that can affect Hg sequestration,there are considerable uncertainties to simply regard sedimentary Hg anomalies as signatures of volcanic *** stable isotopes,a promising tool for tracing the origins and transformations of Hg,have been increasingly used for determining the causes of Hg spikes and understanding the geochemical behavior of Hg in the geologic *** date,lots of researches have applied Hg concentrations and Hg isotopes to identify lIP volcanisms linking with significant geological events such as mass extinctions,ocean anoxic events and other environmental perturbations that mainly occurred in the ***,the results in previous studies clearly show that not all Hg enrichments are derived from volcanic inputs,which emphasize the need for more caution in using Hg as a fingerprint of *** a better understanding of Hg isotopes in the future,there will be important implications for Hg isotopes to reconstruct volcanic activities in the rock records and their impacts on biological evolution.

关键词： Mercury stable isotopes large igneous province Mass extinction event Ocean anoxic event

Monocyte to High-density lipoprotein Cholesterol Ratio as a Predictor of Nonalcoholic Fatty liver Disease in Childhood Obesity

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Current Medical Science 2024年第4期44卷 692-697页

作者： Jun-feng ZHANG Feng-qing CAI Xiu-cai ZHANG qing YE Department of laboratory Medicine Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou310052China

Objective Inflammation is involved in the development and progression of nonalcoholic fatty liver disease(NAFlD).The monocyte to high-density lipoprotein cholesterol ratio(MHR)has emerged as a marker for various inflammation-related *** aim of the present study was to investigate the association between the MHR and NAFlD in a population with childhood *** Based on hepatic ultrasound,a total of 504 children with obesity(357 with NAFlD and 147 without NAFlD)were included in the *** correlation between the MHR and NAFlD risk factors was assessed by Pearson’s and Spearman’s *** stepwise logistic regression analyses were conducted to explore the association between the MHR and the risk of *** The MHR in patients with NAFlD was significantly greater than that in patients without NAFlD[0.52(0.44-0.67)versus 0.44(0.34-0.57),Pltivariate stepwise logistic regression analysis demonstrated that the MHR[odds ratio(OR):1.033,95%confidence interval(CI):1.015-1.051;PlD in childhood obesity patients,as were age(OR:1.205,95%CI:1.059-1.371;P=0.005],waist circumference[OR:1.037,95%CI:1.008-1.067;P=0.012],and alanine transaminase[OR:1.067,95%CI:1.045-1.089;Plly,MHR quartiles showed a significant positive association with the incidence of NAFlD after adjusting for potential confounding *** The present study showed that the MHR may serve as an available and useful indicator of NAFlD in individuals with childhood obesity.

关键词： nonalcoholic fatty liver disease obesity monocyte-to-high-density lipoprotein ratio marker

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三维电大问题的辅助激励源区域分解算法

西安电子科技大学学报 2009年第5期36卷 851-856页

作者：吕志清安翔西安电子科技大学天线与微波技术重点实验室陕西西安710071 毫米波国家重点实验室江苏南京210096

针对三维电大问题,提出了一种基于辅助激励源的区域分解算法.将原求解区域划分成互不重叠的子区域以降低计算复杂度.通过引入Robin类型的辅助激励源,使相邻子区域之间的信息交换仅限于其分界面上,消除了"内谐振"现象.根据矢量有限元方... 详细信息

针对三维电大问题,提出了一种基于辅助激励源的区域分解算法.将原求解区域划分成互不重叠的子区域以降低计算复杂度.通过引入Robin类型的辅助激励源,使相邻子区域之间的信息交换仅限于其分界面上,消除了"内谐振"现象.根据矢量有限元方法独立地处理每个子区域,建立了原问题的粗问题.对于具有几何重复性特征的有限周期结构,引入了基本子区域,有效地提高了计算效率.

关键词：区域分解算法矢量有限元辅助激励源有限元分裂与互连有限周期结构

Recent geomagnetic storms observed by Macao Science Satellite-1

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Earth and Planetary Physics 2024年第4期8卷 565-569页

作者： qing Yan HongBo Yao Macao Institute of Space Technology and Application Macao University of Science and TechnologyMacao 999078China

Geomagnetic storms are rapid disturbances of the Earth’s *** are related to many geophysical phenomena and have large influences on human *** and studying geomagnetic storms is thus of great significance to both scientific research and geomagnetic hazards *** Macao Science Satellite-1(MSS-1)project includes two high-precision Chinese geomagnetic satellites successfully launched on May 21,*** main purpose of MSS-1 is to accurately measure the Earth’s magnetic ***,we analyze early MSS-1 geomagnetic field measurements and report observations of two recent geomagnetic storms that occurred on March 24,2024 and May 11,*** also calculate the related geoelectric fields as an initial step towards a quantitative assessment of geomagnetic hazards.

关键词： Macao Science Satellite-1 geomagnetic storms satellite magnetics electromagnetic induction geoelectric fields