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Extension of π-Calculus with Interval Action Prefixes

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Chinese Journal of Electronics 2016年第5期25卷 848-857页

作者： luo ling DUAN Zhenhua TIAN Cong Institute of Computing Theory and Technology Xidian University

This paper presents an extension of π-calculus, named p-π, with interval action prefixes. The syntax and operational semantics of p-π are formalized, and the algebraic and time-dependent properties are *** on them, how time-dependent behaviors of systems can be modeled with p-π is demonstrated. Finally, a case study is given to illustrate how p-π is used in practise.

关键词： π-Calculus Process algebra Interval action prefixes Specification Verification

Experimental and Theoretical Study on Piezoresistive Behavior of Compressible Melamine Sponge Modified by Carbon-based Fillers

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Chinese Journal of Polymer Science 2022年第11期40卷 1503-1512页

作者： Xiao-ling luo Dirk W.Schubert Institute of Polymer Materials Friedrich-Alexander-University Erlangen-NurembergMartensstr.7Erlangen91058Germany KeyLab Advanced Fiber Technology Bavarian Polymer InstituteDr.Mack-Strasse 77Fürth90762Germany

High-performance compression sensors have been playing an increasingly important role in human motion detection,health monitoring and human-machine interfaces over recent ***,it remains a great challenge to develop theoretical models providing practical guidance to the sensor ***,carbon black(CB),carbon nanotubes(CNTs)and graphene nanoplatelets(GNPs)were respectively incorporated into porous melamine sponges by a facile approach of dip-coating to fabricate compression *** compression-resistance tests show that the compressibility,stability and piezoresistive sensitivity of sensors could be tailored by the filler type and concentration.A model considering the number of conductive pathways(NCP)is given to describe the relationship between the resistance change and applied compression,showing extremely good agreement with the experimental ***,the correlation between the equivalent filler volume fraction and conductivity is described by the other two models proposed by McLachlan and Kirkpatrick,revealing the electrical percolation thresholds(Φc)for the conductive systems under *** the three fillers,CB particles endowed the composite with the best piezoresistive sensitivity but the largestΦc due to its small size and aspect ratio.A combination of experimental study and theoretical model opens up a way of further understanding the piezoresistive sensing behavior as well as optimizing the electrical property and piezoresistivity of compressive conductive polymer composite.

关键词： Compression sensor Melamine sponge Model Piezoresistivity

德尔布有孢圆酵母对苹果酒发酵过程风味物质合成的影响

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食品工业科技 2025年第1期46卷 283-291页

作者：肖子一赵玉川罗玲黄丹罗惠波李子健四川轻化工大学生物工程学院四川自贡643000 四川化工职业技术学院四川泸州646300 酿酒生物技术及应用四川省重点实验室四川自贡643000

本研究利用德尔布有孢圆酵母(Torulasporadelbrueckii)与酿酒酵母(Saccharomycescerevisiae)进行苹果酒发酵实验,通过比较混合发酵与酿酒酵母单独发酵过程中有机酸以及挥发性风味物质差异,探究德尔布有孢圆酵母对苹果酒风味物质合成的... 详细信息

本研究利用德尔布有孢圆酵母(Torulasporadelbrueckii)与酿酒酵母(Saccharomycescerevisiae)进行苹果酒发酵实验,通过比较混合发酵与酿酒酵母单独发酵过程中有机酸以及挥发性风味物质差异,探究德尔布有孢圆酵母对苹果酒风味物质合成的影响。结果表明,德尔布有孢圆酵母显著提高了苹果酒中草酸(+0.077 g/L)、乙酸(+1.68 g/L)、L-乳酸(+0.83 g/L)以及琥珀酸(+0.45 g/L)的含量(P<0.01),并减少了苹果酒中高级醇的数量。共现网络分析显示德尔布有孢圆酵母的加入增强了挥发性风味物质合成的稳定性。此外,混合发酵显著提升了苯乙醇、苯甲醛、乙酸苯乙酯、辛酸、己酸等11种挥发性风味物质含量,有助于凸显苹果酒中苹果特征香、花果香,增强蜜甜感。基于差异风味物质通路富集结果,德尔布有孢圆酵母可赋予发酵体系更强的原料利用能力,糖类物质的转化能力以及风味物质合成能力。研究结果表明该菌株有着优异的混合发酵性能,为其在苹果酒酿造中进一步利用提供了依据。

关键词：苹果酒德尔布有孢圆酵母酿酒酵母混合发酵风味物质

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Comparisons and applications of numerical simulation methods for predicting aerodynamic heating around complex configurations

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Acta Mechanica Sinica 2011年第3期27卷 339-345页

作者： Jin-ling luo Hong-Lin Kang Jian Li Wu-Ye Dai Northwestern Polytechnical University 710072 Xi'an China Beijing Electro-Mechanical Engineering Institute100074 Beijing China

Numerical simulation methods of aerodynamic heating were compared by considering the inuence of numerical schemes and turbulence models,and attempting to investigate the applicability of numerical simulation methods on predicting heat flux in engineering applications. For some typical cases provided with detailed experimental data,four spatial schemes and four turbulence models were adopted to calculate surface heat flux. By analyzing and comparing,some inuencing regularities of numerical schemes and turbulence models on calculating heat flux had been acquired. It is clear that AUSM＋-up scheme with rapid compressibilitymodified high Reynolds number k鈥撓？model should be appropriate for calculating heat flux. The numerical methods selected as preference above were applied to calculate the heat flux of a 3-D complex geometry in high speed turbulent flows. The results indicated that numerical simulation can capture the complex flow phenomena and reveal the mechanism of aerodynamic heating. Especially,the numerical result of the heat flux at the stagnation point of the wedge was well in agreement with the prediction of Kemp鈥揜iddel formula,and the surface heat flux distribution was consistent with experiment results,which implied that numerical simulation can be introduced to predict heat flux in engineering applications.

关键词： Aerodynamic heating . Complex configurations . Numerical simulation

Material flow behavior and microstructural evolution during refill friction stir spot welding of alclad 2A12-T4 aluminum alloy

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 131-141页

作者： Gao-hui Li Li Zhou ling-yun luo Xi-ming Wu Ning Guo State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology(WeihaiWeihai)264209China

In this study, we used the stop-action technique to experimentally investigate the material flow and microstructural evolution of alclad 2A12-T4 aluminum alloy during refill friction stir spot *** are two material flow components, i.e., the inward-or outward-directed spiral flow on the horizontal plane and the upward-or downward-directed flow on the vertical *** the plunge stage, the flow of plasticized metal into the cavity is similar to that of a stack, whereby the upper layer is pushed upward by the lower *** the refill stage, this is process *** such, there is no obvious vertical plasticized metal flow between adjacent *** leads to the coarsening of S(Al2CuMg) in the thermo-mechanically affected zone and the diminishing of S in the stir *** dynamic recrystallization results in the formation of fine equiaxed grains in the stir zone, but this process becomes difficult in the thermo-mechanically affected zone due to the lower deformation rate and the pinning action of S precipitates on the dislocations and sub-grain boundaries, which leads to a high fraction of low-angle grain boundaries in this zone.

关键词： refill friction stir spot welding aluminum alloy material flow behavior precipitate evolution dislocation configuration

Drawing-upsetting-extrusion-clinching of high-strength steel and aluminum alloy

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Journal of Iron and Steel Research International 2023年第10期30卷 1974-1986页

作者： ling-feng luo Shang-yu Huang Mei Yang Jian-hua Hu Bing Ou School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Engineering Research Center for Green Precision Material Forming Wuhan University of TechnologyWuhan 430070HubeiChina Shanghai Technician School Shanghai 200437China

To realize good point connection between high-strength steel and aluminum alloy,a process of drawing-upsetting-extrusion-clinching was ***,the sheets were drawn;then,the bottom of the protrusion part was extruded,forming the necessary initial interlock;and finally,the protrusion part was reverse press clinched,forming a certain height of the clinched *** DP980 high-strength steel and A15083 aluminum alloy as the connection objects and using the method of numerical simulation combined with experimental test,the mold was made,and the experiment was carried out on the basis of numerical *** experimental results proved the feasibility of the process and the effectiveness of the numerical *** simulation and experimental results show that the necessary interlock in the drawing-upsetting-extrusion stage is the premise of effective *** relative protrusion height should be around 55.6%after *** best comprehensive mechanical properties measured by strength test were shear resistance of 2644 N,fatigue life of 24,535 times and peel resistance of 1522 *** failure analysis,the relationship between the interlock Tu and the neck thickness Tn of the joint with the best comprehensive mechanical properties was established as Tu=*** design method of die and process parameters when the sheet thickness changes was researched by numerical *** results show that the clearance between the punch and the die and the bottom thickness are directly proportional to the sheet thickness,and the drawing depth is directly proportional to the punch radius.

关键词： Clinching High-strength steel Aluminum alloy Process parameter Joint strength

Adaptive dynamic reconfiguration mechanism of unmanned swarm topology based on an evolutionary game

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Journal of Systems Engineering and Electronics 2023年第3期34卷 598-614页

作者： YU Minggang NIU Yanjie LIU Xueda ZHANG Dongge ZHENG Peng HE Ming luo ling Institute of Command and Control Engineering Army Engineering University of the PLANanjing 210007China Institute of Communication Engineering Army Engineering University of the PLANanjing 210007China

Autonomous cooperation of unmanned swarms is the research focus on“new combat forces”and“disruptive technologies”in military *** mechanism design is the fundamental way to realize autonomous *** the realistic requirements of a swarm network dynamic adjustment under the background of high dynamics and strong confrontation and aiming at the optimization of the coordination level,an adaptive dynamic reconfiguration mechanism of unmanned swarm topology based on an evolutionary game is *** paper analyzes military requirements and proposes the basic framework of autonomous cooperation of unmanned swarms,including the emergence of swarm intelligence,information network construction and collaborative mechanism ***,based on the framework,the adaptive dynamic reconfiguration mechanism is discussed in detail from two aspects:topology dynamics and strategy ***,the unmanned swarms’community network is designed,and the network characteristics are ***,the mechanism characteristics are analyzed by numerical simulation,focusing on the impact of key parameters,such as cost,benefit coefficient and adjustment rate on the level of swarm ***,the conclusion is made,which is expected to provide a theoretical reference and decision support for cooperative mode design and combat effectiveness generation of unmanned swarm operations.

关键词： unmanned swarm operation autonomous collaboration topology reconstruction evolutionary game

Dynamics of local extreme rainfall of super Typhoon Soudelor (2015) in East China

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Science China Earth Sciences 2018年第5期61卷 572-594页

作者： Jinsong PAN Daigao TENG Fuqing ZHANG lingli ZHOU ling luo Yonghui WENG Yunji ZHANG Zhejiang Meteorological Observatory Hangzhou 310021 China Department of Meteorology and Atmospheric Sciences and Center for Advanced Data Assimilation and Prediction Techniques Pennsylvania State University University Park Pennsylvania 16802 USA

The characteristics and dynamics associated with the distribution, intensity, and triggering factors of local severe precipitation in Zhejiang Province induced by Super Typhoon Soudelor(2015) were investigated using mesoscale surface observations, radar reflectivity, satellite nephograms, and the final(FNL) analyses of the Global Forecasting System(GFS) of the National Center for Environmental Prediction(NCEP). The rainfall processes during Soudelor's landfall and translation over East China could be separated into four stages based on rainfall characteristics such as distribution, intensity, and corresponding dynamics. The relatively less precipitation in the first stage resulted from interaction between the easterly wind to the north flank of this tropical cyclone(TC) and the coastal topography along the southeast of Zhejiang Province, China. With landfall of the TC in East China during the second stage, precipitation maxima occurred because of interaction between the TC's principal rainbands and the local topography from northeastern Fujian Province to southwestern Zhejiang Province. The distribution of precipitation presented significant asymmetric features in the third stage with maximal rainfall bands in the northeast quadrant of the TC when Soudelor's track turned from westward to northward as the TC decayed rapidly. Finally, during the northward to northeastward translation of the TC in the fourth stage, the interaction between a mid-latitude weather system and the northern part of the TC resulted in transfer of the maximum rainfall from the north of Zhejiang Province to the north of Jiangsu Province,which represented the end of rainfall in Zhejiang Province. Further quantitative calculations of the rainfall rate induced by the interaction between local topography and TC circulation(defined as "orographic effects") in the context of a one-dimensional simplified model showed that orographic effects were the primary factor determining the intensity of precipit

关键词： TC outer circulation TC principal rainband Orographic effect Expanding of TC's spiral bands

Core collection construction of tea plant germplasm in Anhui Province based on genetic diversity analysis using simple sequence repeat markers

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Journal of Integrative Agriculture 2023年第9期22卷 2719-2728页

作者： TAO ling-ling TING Yu-jie CHEN Hong-rong WEN Hui-lin XIE Hui luo ling-yao HUANG Ke-lin ZHU Jun-yan LIU Sheng-rui WEI Chao-ling State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Tea Processing of Ministry of Agriculture and Rural Affairs/Anhui Provincial Laboratory of Tea Plant Biology and Utilization Anhui Agricultural UniversityHefei 230036P.R.China

The tea plant[Camellia sinensis(L.)***]is an industrial crop in *** Anhui Province has a long history of tea cultivation and has a large resource of tea germplasm with abundant genetic *** reduce the cost of conservation and utilization of germplasm resources,a core collection needs to be *** this end,573 representative tea accessions were collected from six major tea-producing areas in Anhui *** on 60 pairs of simple sequence repeat(SSR)markers,phylogenetic relationships,population structure and principal coordinate analysis(PCoA)were *** analysis indicated that the 573 tea individuals clustered into five groups were related to geographical location and were consistent with the results of the ***,we constructed a core collection consisting of 115 tea individuals,accounting for 20%of the whole *** 115 core collections were considered to have a 90.9%retention rate for the observed number of alleles(Na),and Shannon’s information index(I)of the core and whole collections were highly *** these,39 individuals were preserved in the Huangshan area,accounting for 33.9%of the core collection,while only 10 individuals were reserved in the Jinzhai County,accounting for 8.9%of the core *** of the accessions in the tea plant core collection exhibited a pattern nearly identical to that of the accessions in the entire collection,further supporting the broad representation of the core germplasm in Anhui *** results demonstrated that the core collection could represent the genetic diversity of the original *** present work is valuable for the high-efficiency conservation and utilization of tea plant germplasms in Anhui Province.

关键词： tea plant core collection genetic diversity SSR markers