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China Ocean Engineering 2024年第4期38卷 557-571页

作者： DENG Rui HU Yu-xiao HUANG Si-chong SONG Zhi-jie wang shi-gang WU Tie-cheng School of Ocean Engineering and Technology Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China

To find a better way to estimate the lift force induced by an interceptor on a high-speed mono-hull ship,a series of high-speed mono-hull ship models are designed and investigated under different *** lift forces are obtained by numerical calculations and validated by a model test in a towing *** factors that influence the force are the interceptor height,velocity,draft,and deadrise *** relationship between each factor and the induced lift force is investigated and *** found that the induced lift mainly depends on the interceptor height and advancing velocity,and is proportional to the square of the interceptor height and *** results also showed that the effects of the draft and deadrise angle are relatively less important,and the relationship between the induced lift and these two factors is generally *** on the results,a formula including the combined effect of all factors used to estimate the lift force induced by the interceptor is developed based on systematic *** proposed formula could be used to estimate the lift force induced by interceptors,especially under high-speed condition.

关键词： high-speed mono-hull ship interceptor lift force formula lift force towing tank test computational fluid dynamics

基于BM-TransUNet的咽后壁识别分割

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计算机系统应用 2024年第7期33卷 94-102页

作者：王世刚孙静雯广西科技大学自动化学院柳州545616

图像分割经历了从基于传统的阈值分割等方法逐步发展到基于卷积神经网络的方法.传统的卷积神经网络在分割领域中表现突出,但训练速度慢、分割精度不够高等局限性也逐渐显现.为了克服这些局限性,本文在TransUNet网络的基础上进行改进,提... 详细信息

图像分割经历了从基于传统的阈值分割等方法逐步发展到基于卷积神经网络的方法.传统的卷积神经网络在分割领域中表现突出,但训练速度慢、分割精度不够高等局限性也逐渐显现.为了克服这些局限性,本文在TransUNet网络的基础上进行改进,提出了基于BM-TransUNet网络的图像分割识别方法,在TransUNet网络的在第1层之后加上深度可分离卷积模块,并在编码器下采样的卷积层后引入注意力机制模块,让算法更好地探索分割对象特征,同时在编码器与解码器之间引入多尺度特征融合模块FPN.本文基于自制的咽后壁数据集,用于图像分割训练,并将训练后的BM-TransUNet网络与多种传统分割网络的效果进行对比.实验结果表明,相比于其他传统的深度学习模型,BM-TransUNet网络的识别方法具有较高的分类准确性和泛化能力,精确度Precision和Dice系数分别达到了93.61%和90.76%,显示出较好的计算效率,能有效地应用于分割任务.

关键词： BM-TransUNet网络图像分割注意力机制模块多尺度特征融合模块咽后壁数据集

Improved Pattern Clustering Algorithm for Recognizing Transversal Distribution of Steel Strip Thickness

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Journal of Iron and Steel Research International 2009年第5期16卷 50-55页

作者： TANG Cheng-long wang shi-gang LIANG Qin-hua XU Wei School of Mechanical and Dynamical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Transversal distribution of the steel strip thickness in the entry section of the cold rolling mill seriously affects to the flatness and transversal thickness precision of the final products. Pattern clustering method is introduced into the steel rolling field and used in the patterns recognition of transversal distribution of the steel strip thickness. The well-known k-means clustering algorithm has the advantage of being easily completed, but still has some drawbacks. An improved k-means clustering algorithm is presented, and the main improvements include：（1） the initial clustering points are preselected according to the density queue of data objects; and （2） Mahalanobis distance is applied instead of Euclidean distance in the actual application. Compared to the patterns obtained from the common kmeans algorithm, the patterns identified by the improved algorithm show that the improved clustering algorithm is well suitable for the patterns＇ recognition of transversal distribution of steel strip thickness and it will be useful in online quality control system.

关键词： transversal thickness distribution pattern recognition improved k-means algorithm density queue

Experimental study on combustion characteristics of municipal solid waste

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Journal of Environmental Sciences 2003年第4期15卷 482-486页

作者： JIANG Fan, LIU shi, wang Hai gang, PAN Zhong gang (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China. Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100080 China

As incineration provides a relatively safe means of disposal, significant reduction of weight and volume, and energy recovery from the waste, it was adopted by many countries. For the experimental investigation on the combustion characteristics of municipal solid waste(MSW), a lab scale fluidized bed facility was constructed. Many kinds of combustion runs were conducted in this fluidized bed combustion facility. The examined parameters were bed temperature(773 to 1143K), form of fuels (scrap or whole), moisture of fuels and so on. Concentration of CO 2,CO,SO 2, O 2 and NOx in the flue gas were monitored and recorded every 5 seconds. The temperatures along the reactor are recorded every 10 seconds. Experimental results were given and analyzed.

关键词： municipal solid waste combustion characteristics fluidized bed

Moderate Deviations for Parameter Estimation in the Fractional Ornstein–Uhlenbeck Processes with Periodic Mean

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1308-1324页

作者： Hui JIANG shi Min LI Wei gang wang School of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China The People's Bank of China Operations Ofice of Nanjing Branch Nanjing 210016P.R.China School of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou 310018P.R.China

In this paper,we study the asymptotic properties for the drift parameter estimators in the fractional Ornstein-Uhlenbeck process with periodic mean function and long range *** Cremér-type moderate deviations,as well ... 详细信息

关键词： Cramér-type moderate deviation fractional Ornstein-Uhlenbeck process parameter estimation multiple Wiener-Ito integrals

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太宽河野生蕙兰濒危机制分析与保护研究

安徽农业科学 2024年第5期52卷 112-115页

作者：赵腊梅王刚狮刘瑞霞时宝凌贾泽凡山西运城农业职业技术学院山西运城044000 山西林业职业技术学院山西太原030009 山西省中条山国有林管理局山西侯马043003

[目的]为野生蕙兰(Cymbidium faberi Rolfe)种质资源的保护与利用提供科学依据,为太宽河自然保护区管理局野生蕙兰种群繁育和恢复奠定基础。[方法]采用固定样方法,对野生蕙兰的资源进行调查,运用濒危系数分析法,以能够反映蕙兰濒危程度... 详细信息

[目的]为野生蕙兰(Cymbidium faberi Rolfe)种质资源的保护与利用提供科学依据,为太宽河自然保护区管理局野生蕙兰种群繁育和恢复奠定基础。[方法]采用固定样方法,对野生蕙兰的资源进行调查,运用濒危系数分析法,以能够反映蕙兰濒危程度的活株数、自然枯死株数、幼苗数、开花植株数、坐果植株数、动物啃咬株数、人为采挖株数作为评价指标,对野生蕙兰濒危程度进行了定量分析。[结果]各指标濒危系数表现为动物啃咬濒危系数(C动)0.99>坐果濒危系数(C果)0.93>幼苗濒危系数(C苗)0.89>开花濒危系数(C花)0.88>活株濒危系数(C活)0.83>人为采挖濒危系数(C人)0.71>自然枯死濒危系数(C枯)0.53。调查结果显示,综合濒危系数为0.82,依据国际濒危物种等级新标准,处于濒危状态,其中野生动物危害较大和自我更新能力差是导致保护区内野生蕙兰濒危的主要因素,同时与人的因素也密不可分。[结论]建议建立以保护野生蕙兰为主的重点保护区域,积极开展以野生蕙兰种群恢复为主的科学研究;设立野生动物补饲点,减少对野生蕙兰资源的破坏;加大宣传力度,禁止非法采挖、放牧等人为干扰行为。

关键词：蕙兰野生资源濒危机制保护太宽河保护区

Low-carbon design towards sustainable city development:Integrating glass space with natural greenery

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Science China(Technological Sciences) 2024年第9期67卷 2659-2674页

作者： CAO shi-Jie ZHANG CunKuan wang JunQi FENG ZhuangBo CHEN gang HAGHIGHAT Fariborz School of Architecture Southeast UniversityNanjing 210096China Jiangsu Province Engineering Research Center of Urban Heat and Pollution Control Southeast UniversityNanjing 210096China Global Centre for Clean Air Research Department of Civil and Environmental EngineeringFaculty of Engineering and Physical SciencesUniversity of SurreyGuildfordGU27XHUnited Kingdom The Third Construction Co. Ltd.of China Construction Eighth Engineering DivisionNanjing 210046China Energy and Environment Group Department of BuildingCivil and Environmental EngineeringConcordia UniversityMontrealH3G 1M8Canada

The rapid urban development has caused serious problems such as high energy consumption and carbon emissions,especially under the context of climate *** are particularly energy-intensive,generating about one third of global energyrelated carbon *** with active solutions(like mechanical systems),passive solutions offer the potential to balance energy consumption,thermal comfort,and ecological *** potential solution is the integration of green glass space(GGS)into passive building *** is a transitional building space with glass curtain walls that exhibit excellent insulation performance during ***,GGS is susceptible to overheating during summer,which limits its ***,this work proposes a strategy of integrating vertical greenery into GGS,leveraging the nature-based solution of greenery(i.e.,flourishes in summer and withers in winter)to address this seasonal challenge of *** results demonstrated that the strategic application of vertical greenery can effectively mitigate the overheating in GGS and improve comprehensive *** using full coverage of vertical greenery in a linear layout,the air temperature of GGS and cooling energy consumption were largely reduced by 8.02℃and 12.2%,respectively,while the carbon abatement was enhanced by up to 101.11 *** on a comprehensive evaluation of energy,economy,and environmental benefits,it is recommended to use a greenery configuration with 50%coverage in a vertical linear layout for *** integration of greenery into building design can mitigate adverse environmental impacts,reduce energy consumption,and contribute to the sustainable development of low-carbon cities.

关键词： low-carbon design green glass space vertical greenery greenery configuration carbon abatement

Adhesive Contact of Elastic Solids with Self-Affine Fractal Rough Surfaces

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Acta Mechanica Solida Sinica 2024年第2期37卷 265-270页

作者： Xuan-Ming Liang shi-Wen Chen Si-He wang Zhen-Yuan Gong Jun Feng gang-Feng wang Department of Engineering Mechanics SVL and MMMLXi’an Jiaotong UniversityXi’an710049China OPPO Mobile Telecommunications Corporation Ltd. Dongguan523860China

The elastic adhesive contact of self-affine fractal rough surfaces against a rigid flat is simulated using the finite element method. An array of nonlinear springs, of which the force-separation law obeys the Lennard–Jones potential, is introduced to account for the interfacial adhesion. For fractal rough surfaces, the interfacial interaction is generally attractive for large mean gaps, but turns repulsive as the gap continuously shrinks. The interfacial interactions at the turning point corresponding to the spontaneous contact are shown for various surfaces. For relatively smooth surfaces, the probability density distributions of repulsion and attraction are nearly symmetric. However, for rougher surfaces, the simulation results suggest a uniform distribution for attraction but a monotonously decreasing distribution with a long tail for repulsion. The pull-off force rises with increasing ratio of the work of adhesion to the equilibrium distance, whereas decreases for solids with a higher elastic modulus and a larger surface roughness. The current study will be helpful for understanding the adhesion of various types of rough solids.

关键词： Fractal rough surfaces Adhesion Contact mechanics Lennard-Jones potential

Role of oncogenic long noncoding RNA KCNQ1OT1 in colon cancer

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Oncology Research 2024年第3期32卷 585-596页

作者： gang LIU LEI shi BIN wang ZEHUI WU HAIYUAN ZHAO TIANYU ZHAO LIANGHUI shi Department of Gastrointestinal Surgery First ffiliated Hospital of Wannan Medical CollegeWuhu241001China Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences Stomatological Hospital of Chongqing Medical UniversityChongqing401147China

The role of lncRNA KCNQ1 opposite strand/antisense transcript 1(KCNQ1OT1)in colon cancer involves various tumorigenic processes and has been studed ***,the mechanism by which it promotes colon cancer remains *** vector pSEB61 was retroftted in established HCT116 siKCN and SW480-siKCN cells to silence KCNQ1 *** proliferation was measured using CCK8 assay,and flow cytometry(FCM)detected cell cydle *** sequencing(RNA Seq)analysis showed differentially expressed genes(DEGs).Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were carried out to analyze enriched functions and signaling ***-qPCR,immunofluorescence,and western blotting were carried out to validate downstream gene *** effects of tumorigenesis were evaluated in BALB/c nude mice by tumor *** data revealed that the silencing of KONQ1OT1 in HCT116 and SW480 cells slowed cell growth and decreased the number of cells in the G2/M ***-Seq analysis showed the data of DEGs enriched in various GO and KEGG pathways such as DNA replication and cell *** qPCR,immunofluorescence,and western blotting confirmed downstream CCNE2 and PCNA gene ***116 siKCN cells signifcantly suppressed tumorigenesis in BALB/c nude *** study suggests that lncRNA KCNQ1OT1 may provide a promising therapeutic strategy for colon cancer.

关键词： lncRNA KCNQ1OT1 Colon cancer HCT116 cells Tumorigenesis

Boosting propane dehydrogenation of defective S-1 stabilized singleatom Pt and ZnO catalysts via coordination environment regulation

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Nano Research 2024年第7期17卷 5884-5896页

作者： Fuwen Yang Jie Zhang Jinwei Chen gang wang Tong Yu Qian Li Zongbo shi Qiushi Sun Runsheng Zhuo Ruilin wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China REZEL Catalysts Corporation Shanghai 200120China

Pt single atoms catalysts with precise coordination environment and high stability are expected to achieve high performance of propane dehydrogenation(PDH).In this work,an innovative synthetic strategy is proposed to construct the S-1@0.1Pt9Zn@DPS-1 nanocomposite as a highly efficient PDH *** engineering is applied to induce the formation of defective porous silicalite-1(DPS-1),which is favorable for achieving the uniformly distributed ZnO *** ZnO nanoclusters were further served as anchoring sites to stabilize the isolated Pt *** structural characterization revealed that penta-O coordinated Pt single atom coupled with ZnO nanoclusters decorated on the ***,the atomically dispersed Pt atoms with the ideal coordination environment could act as the predominant active sites for PDH *** expected,the optimal S-1@0.1Pt9Zn@DPS-1 catalyst delivered an excellent PDH performance(propane conversion of 40.7%,propylene selectivity of 97.5%)and good cycling regeneration *** work provides a new way for improving the activity and stability of catalysts in the field of industrial catalysts.

关键词： defect engineering single platinum atom coordination environment propane dehydrogenation propylene