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由微观参量表示的金属单晶体杨氏模量的解析计算式

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物理实验 2004年第8期24卷 43-47页

作者：于长丰杨新铁阎坤王玲西安工程科技学院理学院陕西西安710048 西北工业大学航空工程系陕西西安710072 西安现代非线性科学研究所陕西西安710043

根据原子物理晶体模型 ,采用原子间相互作用的势函数分析方法 ,得到了由微观物理量表示的金属单晶体杨氏模量的解析计算式 .计算了 7种金属晶体的杨氏模量及金属晶体的断裂强度 ,计算结果与实际值吻合很好 .

关键词：杨氏模量逻辑力学金属单晶体势函数面心立方结合能

Enhancement of low-temperature toughness of Fe-Mn-C-Al alloy by rare earth Ce-modified inclusions

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Journal of Iron and Steel Research International 2024年第1期31卷 157-173页

作者： Guang-kai Yang chang-ling Zhuang Yi-zhuang Li Chen Hu Shao-bo Li college of Materials and Metallurgy Guizhou UniversityGuiyang550025GuizhouChina Department of Mechanical Engineering University of Hong KongHong Kong999077China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025GuizhouChina

Fe-Mn-C-Al alloys have been recognized as promising materials for certain low-temperature applications due to their exceptional mechanical properties and ***,their limited low-temperature toughness restricts their large-scale applications in specific *** influence of trace amounts of rare earth cerium(Ce)on the low-temperature toughness of Fe-18Mn-0.6C-1.8Al alloys was *** addition of Ce effectively alters the inclu-sions in the alloy,transforming large-sized irregular inclusions into fine ellipsoidal rare earth *** leads to a significant reduction in both the proportion and average size of the inclusions,resulting in their effective dispersion throughout the matrix and improved cryogenic *** presence of Ce-containing inclusions within the matrix reduces stress concentration,thereby inhibiting microcrack formation and improving impact absorption ***-cally,the addition of rare earth Ce alters the fracture behavior of the material at room temperature and low temperature,{3.ing from brittle cleavage fracture to a more ductile failure *** impact toughness of the Fe-Mn-C-Al alloy is significantly improved by the addition of 0.0048 wt.%Ce,particularly at-196℃where the impact toughness reaches 103.6 J/cm^(2.,representing an impressive improvement of 87.3..

关键词： Fe-Mn-C-Al alloy Rare earth Low-temperature toughness Inclusion Fracture

High Colloidal Stable Carbon Dots Armored Liquid Metal Nano-Droplets for Versatile 3./4D Printing Through Digital Light Processing(DLP)

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Energy & Environmental Materials 2024年第3期7卷 432-438页

作者： Linan Wang Junle Zhang xi Zhang Ge Shi Yanjie He Zhe Cui xiaomeng Zhang Peng Fu Minying Liu xiaoguang Qiao xinchang Pang Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials Henan Key Laboratory of Advanced Nylon Materials and ApplicationSchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China college of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan Engineering Technology Research Center for Fiber Preparation and ModificationHenan University of EngineeringZhengzhou 451191China

Liquid metal(LM)and liquid metal alloys(LMs)possess unique physicochemical features,which have become emerging and functionalized materials that are attractive applicants in various ***,uniform LM nanodroplets armored by carbon dots(LMD@CDs)were prepared and exhibited high colloidal stability in various solvents,as well as *** optimization,LMD@CDs can be applied as functional additives for the 3./4D printing of hydrogel and cross-linked resin through digital light processing(DLP).The light absorption of LMD@CDs not only improved the printing accuracy,but also led to the cross-linking density differential during the post-curing *** on the cross-linking density differential of soft hydrogel and photothermal performance of the LM,the 3. printed objects can exhibit stimulus responses to both water and laser ***,the CDs shell and LM core of LMD@CDs provide the printed objects interesting photoluminescence and electric conductivity capabilities,*** deduce this versatile 3./4D printing system would provide a new platform for the preparation of multi-functional and stimuli-responsive advance materials.

关键词： 4D printing carbon dots liquid metal nanodroplets

SWOT Analysis of Agricultural Product Logistics Development——A Case Study of Shaanxi Province

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Asian Agricultural Research 2011年第12期3卷 32-34,38页

作者： WAN Yuan-yuan1, YAN Shu-rong2.1. Shaanxi college of Communication Technology, xi’an 710018, china 2. School of Economics and Management,{2., xi’an 710064, china

SWOT method is used to analyze strengths and weaknesses in internal environment and opportunities and threats in external environment of development of agricultural product logistics in Shaanxi Province. The research indicates that the logistic development strategy of agricultural products in Shaanxi Province should bring into full play strengths in traffic, production, labor force, and science and technology. Besides, it is required to overcome weaknesses in information mechanism and management mode. Furthermore, we should take full advantage of domestic and international resources to develop famous, excellent and special products, to achieve high-efficient, rapid, and convenient development of logistics for agricultural products.

关键词： SWOT analysis Agricultural products Logistics deve

MHD Flow Control of Oblique Shock Waves Around Ramps in Low-temperature Supersonic Flows

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Chinese Journal of Aeronautics 2010年第1期23卷 22-32页

作者： Su changbing,Li Yinghong,Cheng Bangqin,Wang Jian,Cao Jun,Li Yiwen Engineering college,Air Force Engineering {2.,xi’an 71003.,{3. Engineering college Air Force Engineering University Xi'an 710038 China

This article is devoted to experimental study on the control of the oblique shock wave around the ramp in a low-temperature supersonic flow by means of the magnetohydrodynamic （MHD） flow control technique. The purpose of the experiments is to take advantage of MHD interaction to weaken the oblique shock wave strength by changing the boundary flow characteristics around the ramp. Plasma columns are generated by pulsed direct current （ DC ） discharge, the magnetic fields are generated by Nd-Fe-B rare-earth permanent magnets and the oblique shock waves in supersonic flow are generated by the ramp. The Lorentz body force effect of MHD interaction on the plasma-induced airflow velocity is verified through particle image velocimetry（PIV）measurements. The experimental results from the supersonic wind tunnel indicate that the MHD flow control can drastically change the flow characteristics of the airflow around the ramp and decrease the ratio of the Pitot pressure after shock wave to that before it by up to 19.66% ,which leads to the decline in oblique shock wave strength. The oblique shock waves in front of the ramp move upstream by the action of the Lorentz body force. The discharge characteristics are analyzed and the MHD interaction time and consumed energy are determined with the help of the pulsed DC discharge images. The interaction parameter corresponding to the boundary layer velocity can reach 1.3.from the momentum conservation equation. The velocity of the plasma column in the magnetic field is much faster than that in the absence of magnetic field force. The plasma can strike the neutral gas molecules to transfer momentum and accelerate the flow around the ramp.

关键词： aerospace propulsion system magnetohydrodynamic flow control plasma shock wave

A New Method for Diagnosis of Leukemia Utilizing a Hybrid DL-ML Approach for Binary and Multi-Class Classification on a Limited-Sized Database

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Computer Modeling in Engineering & sciences 2024年第4期139卷 593-631页

作者： Nilkanth Mukund Deshpande Shilpa Gite Biswajeet Pradhan Abdullah Alamri chang-Wook Lee Department of Electronics&Telecommunication LavaleSymbiosis Institute of TechnologySymbiosis International(Deemed University)PuneMaharashtra412115India Electronics&Telecommunication Dr.Vithalrao Vikhe Patil College of EngineeringAhmednagarMaharashtra414111India Artificial Intelligence and Machine Learning Department Symbiosis Institute of TechnologySymbiosis International(Deemed)UniversityPune412115India Symbiosis Centre of Applied AI(SCAAI) Symbiosis International(Deemed)UniversityPune412115India Centre for AdvancedModelling and Geospatial Information Systems(CAMGIS) School of Civil and Environmental EngineeringFaculty of Engineering&ITUniversity of Technology SydneySydneyAustralia earth Observation Centre Institute of Climate ChangeUniversiti Kebangsaan MalaysiaBangiSelangor43600Malaysia Department of Geology&Geophysics College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia Department of science Education Kangwon National UniversityChuncheon-si24341Korea

Infection of leukemia in humans causes many complications in its later *** impairs bone marrow’s ability to produce *** diagnosis of human blood cells is a well-known and well-proven technique for diagnosis in this *** binary classification is employed to distinguish between normal and leukemiainfected *** addition,various subtypes of leukemia require different *** sub-classes must also be detected to obtain an accurate diagnosis of the type of *** entails using multi-class classification to determine the leukemia *** is usually done using a microscopic examination of these blood *** to the requirement of a trained pathologist,the decision process is critical,which leads to the development of an automated software framework for *** utilized state-of-the-art machine learning approaches,such as Support Vector Machine(SVM),Random Forest(RF),Na飗e Bayes,K-Nearest Neighbor(KNN),and others,to provide limited accuracies of *** advanced deep-learning methods are also *** to constrained dataset sizes,these approaches result in over-fitting,reducing their outstanding *** study introduces a deep learning-machine learning combined approach for leukemia *** uses deep transfer learning frameworks to extract and classify features using state-of-the-artmachine learning *** transfer learning frameworks such as VGGNet,Xception,InceptionResV2.Densenet,and ResNet are employed as feature *** extracted features are given to RF and XGBoost classifiers for the binary and multi-class classification of leukemia *** the experimentation,a very popular ALL-IDB dataset is used,approaching a maximum accuracy of 100%.A private real images dataset with three subclasses of leukemia images,including Acute Myloid Leukemia(AML),Chronic Lymphocytic Leukemia(CLL),and Chronic Myloid Leukemia(CML),is also employed to generalize the *** d

关键词： Leukemia diagnosis deep learning machine learning random forest XGBoost

嗜肺军团菌mip/ctxB融合基因体外表达与动物免疫试验的免疫原性研究

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生物化学与生物物理进展 2004年第9期31卷 818-823页

作者：王涛陈建平郅克谦陶大昌杨春蕾张雷四川大学华西医学中心基础医学与法医学院寄生虫学教研室成都610041 西安交通大学口腔医学院颌面外科西安710004 四川大学华西医院成都610041 四川大学生命科学院医学细胞生物学教研室成都610041 大理学院微生物学教研室大理671000

PCR扩增嗜肺军团菌mip基因和霍乱弧菌ctxB基因,克隆入载体pcDNA3.1( +),重组子经限制性酶切分析、PCR、序列分析鉴定正确后,命名为pcDNA3.1 mip/ctxB.脂质体法将重组质粒pcDNA3.1 mip、pcDNA3.1 mip/ctxB转染NIH3.3.胞,用免疫荧光法和... 详细信息

PCR扩增嗜肺军团菌mip基因和霍乱弧菌ctxB基因,克隆入载体pcDNA3.1( +),重组子经限制性酶切分析、PCR、序列分析鉴定正确后,命名为pcDNA3.1 mip/ctxB.脂质体法将重组质粒pcDNA3.1 mip、pcDNA3.1 mip/ctxB转染NIH3.3.胞,用免疫荧光法和蛋白质印迹鉴定瞬时表达和稳定表达产物,结果发现:重组质粒成功转入细胞并获得短暂表达,稳定转染细胞分别在 2.4ku和 3.ku处检测到阳性杂交信号.将pcDNA3.1 mip、pcDNA3.1 mip/ctxB作为DNA疫苗免疫BALB/c小鼠,检测免疫小鼠体内抗原特异性抗体水平、脾淋巴细胞增殖活性、IFN γ产生水平、细胞毒性T淋巴细胞(CTL)杀伤活性等体液免疫和细胞免疫反应的指标,评价疫苗的免疫原性.结果发现:各实验组均检测到免疫原性,pcDNA3.1 mip/ctxB免疫组的免疫原性高于pcDNA3.1 mip免疫组,有显著性差异(P <0 0 1).

关键词：嗜肺军团菌霍乱弧菌 mip/ctxB融合基因体外表达免疫原性

Study and Establishment of regional elastic block strain model based on GPS data

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Study and Establishment of regional elastic block strain mod...

Pollen record from red clay sequence in the central Loess Plateau between 8.10 and 2.60Ma

第三届中国卫星导航学术年会

作者： Wei QU 1,2.Qin ZHANG 1,2.Shuang-Cheng ZHANG 1,2.Li WANG 1,2.QinLiang WANG 3.Zhen-Hong LI 41.college of Geology Engineering and Geomatics,chang''an {2.,xi''an 710054,china 2.Key Laboratory of Western china''s Mineral Resources and Geological Engineering,Ministry of Education,xi''an 710054,china 3.Second Monitoring and Application Center,xi''an 710054,china 4.Department of Geographical and earth sciences,{2. of Glasgow 8QQ,UK

This paper mainly studies how to use the measured GPS data to build a rational regional crustal elastic block strain model,and chooses xi’an as the research *** on the GPS monitoring data from 2.06 to 2.08,and by further made significant hypothesis test whether the parameters of the model can reflect the regional internal deformation characteristics,the rational regional crustal elastic block strain model of xi’an areas is built combined with the special tectonic *** to the abovementioned,the present crustal tectonic strain parameters and its accuracy indicators of xi’an areas are *** it is also revealed that the present strain field characteristics of xi’an *** results show that the present tectonic strain fields have obvious differences between xian southern and northern *** present tectonic strain fields of xi’an southern part mainly demonstrates tensile strain with NNW-SSE direction,with the maximum value of the tensile strain reached 3.2.×10-7 /y,while the present tectonic strain fields of xi’an northern part mainly demonstrates compression strain with NNW-SSE direction,with the maximum value of the tensile strain reached 3.07×10-7 /*** strain characteristic is corresponding to the imbalance distribution of ground fissures between xian southern and northern areas.

关键词： GPS Elastic block strain model Tectonic strain fields Hypothesis testing

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science Bulletin 2005年第19期 116-125页

作者： MA Yuzhen1, WU Fuli1,3. FANG xiaomin3.1, LI Jijun1, AN Zhisheng2.& WANG Wei1 1. Key Laboratory of Western china’s Environmental Systems (MOE) and college of Resources and Environment, Lanzhou {2., Lanzhou 73.000, china 2. State Key Laboratory of Loess and Quaternary Geology, Institute of earth Environment, Chinese Academy of sciences, xi’an 710054, china 3. Institute of Tibetan Plateau Research, Chinese Academy of sciences, Beijing 100085, china

The Late Miocene and Pliocene are the key periods for understanding the origin and development of the present Asian monsoon circulations and ecologic environ-ments. Here we present a pollen record from Chaona Red Clay section located in the central Loess Plateau in attempt to establish the histories of vegetation and associated climate changes between 8.10 and 2.60 Ma. Our results show that Gramineae-dominated woodland-grasslands developed in this region with Cedrus- and Pinus-characterized montane coniferous forests distributing in higher elevations from 8.10 to 6.73.Ma, probably suggesting a semi-humid climate in a warm-temperate zone. A subsequent expansion of Ulmus- dominated deciduous forests and a synchronous increase of Gramineae-dominated grassland reflect a warmer and more humid climate between 6.73.and 5.67 Ma. The vegetation changed to an Artemisia- and Gramineae-characterized steppe in lower elevations and to a coniferous forest in higher elevations from 5.67 to 3.71 Ma, implying probably a warm and semiarid climate in lowland and hill, and a colder and moister climate in mountain. During this period, a consider-able warmer and more humid climate occurred between 4.61 and 4.07 Ma as indicated by pollen assemblages. The period between 3.71 and 2.58 Ma was characterized by the disap-pearance of Cedrus and Tsuga and also by an abrupt expan-sion of Cupressaceae, reflecting a drastic enhancement of monsoon-related climatic seasonality.

关键词： Loess Plateau red clay pollen record vegetation evolu-tion winter and summer monsoon