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Detection of semantically similar code

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Frontiers of Computer Science 2014年第6期8卷 996-1011页

作者： tiantian wang Kechao wang Xiaohong SU Peijun MA School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China School of Software Harbin University Harbin 150086 China

The traditional similar code detection approaches are limited in detecting semantically similar codes, impeding their applications in practice. In this paper, we have improved the traditional metrics-based approach as well as the graph- based approach and presented a metrics-based and graph- based combined approach. First, source codes are represented as augmented system dependence graphs. Then, metrics- based candidate similar code extraction is performed to filter out most of the dissimilar code pairs so as to lower the computational complexity. After that, code normalization is performed on the candidate similar codes to remove code variations so as to detect similar code at the semantic level. Finally, program matching is performed on the normalized control dependence trees to output semantically similar codes. Experiment results show that our approach can detect similar codes with code variations, and it can be applied to large software.

关键词： similar code detection system dependence graph code normalization semantically equivalent

Maximizing ionic transport of Li1+xAlxTi2-xP3O12 electrolytes for all-solid-state lithium-ion storage:A theoretical study

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Journal of Materials Science & Technology 2021年第14期73卷 45-51页

作者： tiantian wang Jun Mei Jianjun Liu Ting Liao State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences1295 Dingxi RoadShanghai 200050China School of Mechanical Medical and Process EngineeringQueensland University of Technology2 George StreetBrisbaneQLD4000Australia School of Chemistry and Physics Queensland University of Technology2 George StreetBrisbaneQLD4000Australia Centre of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Centre for Materials Science Queensland University of Technology2 George SfreefBrisbane.QLD4000Australia

The concept of all-solid-state batteries provides an efficient solution towards highly safe and long-life energy storage,while the electrolyte-related challenges impede their practical ***1+xAlxTi2-xP3O12(0≤x≤1)with superior Li ionic conductivity holds the promise as an ideal solidstate *** intrinsic mechanism to reach the most optimum ionic conductivity in Al-doped Li1+xAlxTi2-xP3O12,however,is unclear to ***,this work intends to provide an atomic scale study on the Li-ion transport in Li1+xAlxTi2-xP3O12electrolyte to rationalize how Al-dopant initiates interstitial Li activity and facilitate their easy mobility combining Density Functional Theory(DFT)and ab initio Molecular dynamics(AIMD)*** is discovered that the interstitial Li ions introduced by Al dopants can effectively activate the neighboring occupied intrinsic Li-ions to induce a long-range mobility in the lattice and the maximum Li ionic conductivity is achieved at 0.50 Al doping *** Li-ion migration paths in Li1+xAlxTi2-xP3O12have investigated as the degree of distortion of[PO4]tetrahedra and[TiO6]octahedra resulted by different Al doping *** asymmetry of the surrounding distorted[PO4]and[TiO6]polyhedrons play a critical role in reducing the migration barrier of Li ions in Li1+*** flexible[Ti O6]polyhedrons with a capacity to accommodate the structural distortion govern the Li ionic conductivity in Li1+*** work rationalizes the mechanism for the most optimum Li ionic conductivity in Al-doped Li Ti2P3O12electrolyte and,more importantly,paves a road for exploring novel all-solid-state lithium battery electrolytes.

关键词： Density Functional Theory Solid-state-electrolyte Li ionic conductivity Bond angle variance Al-dopant

Porous polymer electrolytes for long-cycle stable quasi-solid-state magnesium batteries

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Journal of Energy Chemistry 2021年第8期30卷 608-614,I0013页

作者： tiantian wang Xudong Zhao Fanfan Liu Li-Zhen Fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology Beijing100083 BeijingChina

The development of applicable electrolytes is the key point for high-performance rechargeable magnesium batteries(RMBs).The use of liquid electrolyte is prone to safety problems caused by liquid electrolyte ***-based gel electrolytes with high ionic conductivity,great flexibility,easy processing,and high safety have been studied by many scholars in recent *** this work,a novel porous poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)membrane is prepared by a phase inversion *** immersing porous PVDF-HFP membranes in MgCl2-AlCl3/TEGDME(Tetraethylene glycol dimethyl ether)electrolytes,porous PVDF-HFP based electrolytes(PPEs)are *** PPE exhibits a high ionic conductivity(4.72×10^(-4) S cm-1,25℃),a high liquid electrolyte uptake of 162%,as well as a wide voltage window(3.1 V).The galvanostatic cycling test of Mg//Mg symmetric cell with PPE reveals that the reversible magnesium ion(Mg^(2+))plating/stripping occurs at low overpotentials(~0.13 V).Excellent long cycle stability(65.5 mAh g^(-1) over 1700 cycles)is achieved for the quasisolid-state RMB assembled with MoS2/C cathode and Mg *** with the liquid electrolyte,the PPE could effectively reduce the side reactions and make Mg^(2+)plating/stripping more uniformly on the Mg electrode *** strategy herein provides a new route to fabricate high-performance RMB through suitable cathode material and polymer electrolyte with excellent performance.

关键词： Porous polymer electrolyte Reversible plating/stripping process MoS_(2)/C cathode Quasi-solid-state magnesium batteries

Direct Coupling Reaction of Diaryl Methanol with Ketones or Aldehydes Catalyzed by AlCl_(3)

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Chinese Journal of Chemistry 2014年第11期32卷 1176-1182页

作者： Zhiqiang Zhu Peng Bai tiantian wang Zhizhen Huang Department of Chemistry Zhejiang UniversityHangzhouZhejiang 310028China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

A novel coupling reaction of diaryl methanols with ketones or aldehydes has been developed under the catalysis of AlCl_(3).Various ketones and aldehydes could couple with 9H-xanthen-9-ol smoothly,affording coupling products in 48%-88%yields.A plausible mechanism using AlCl_(3) to activate both diaryl methanol and ketone or aldehyde is proposed.

关键词： coupling reaction alcohol ketone aldehyde AlCl_(3) catalysis

Effect of the liquid temperature on the interaction behavior for single water droplet impacting on the immiscible liquid

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Chinese Physics B 2021年第11期30卷 488-494页

作者： tiantian wang Changjian wang Shengchao Rui Kai Pan School of Civil Engineering Hefei University of TechnologyHefei 230009China Anhui International Joint Research Center on Hydrogen Safety Hefei 230009China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of EducationHefei 230009China

The interaction of single water droplet impacting on immiscible liquid surface was focused with the temperature varying from 50℃ to 210℃.The impact behavior is recorded with a high-speed camera running at 2000 frames per *** is found that droplet diameter,oil temperature,andWeber number have important influences on impact *** typical phenomena,including penetration,crater-jet,and crater-jet–secondary jet,were *** only occurs when the Weber number is below *** Weber number increasing to 302,the jet begins to ***,to gain deeper physical insight into the crater formation and jet formation,the energy of droplet impingement onto the liquid pool surface was *** oil temperature has a significant effect on the energy conversion *** temperature is beneficial to improve energy conversion efficiency.

关键词： droplet impact crater-jet weber number immiscible liquid

The effects of humus moisture content on underground fires in a Larix gmelinii plantation

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Journal of Forestry Research 2022年第3期33卷 865-873页

作者： Xiyue Han Hening Xu tiantian wang Sainan Yin Bo Gao Yajun wang Yanlong Shan Beihua University Science and Technology Innovation Center of Wildland Fire Prevention and Control Forestry College of Beihua University3999 Binjiang East RoadJilin City132013Jilin ProvincePeople’s Republic of China

Underground fires are a smoldering combustion with a slow spread rate, low temperatures and no flame. They can last from days to several months, and can even become overwintering fires. They are difficult to find, leading to considerable damage to the forests. The moisture content of combustible fuels is an important factor in the occurrence and persistence of underground forest fires. The Daxing’an Mountains are a hot spot for underground fires in China. This paper looks at the influence of different moisture contents on underground fire characteristics using simulation combustion experiments in the laboratory. The study showed that peak temperature and spread rate fluctuation of humus at different moisture levels increased with humus depth. Peak temperature and spread rate fluctuation of humus at different depths decreased with increased moisture;moisture content and depth of humus had a significant effect on peak temperature and spread rate fluctuation;peak temperature at different depths decreased with increased moisture;the spread rate in upper layers increased with moisture content, while the spread rate in the lower layers decreased with increased moisture content.

关键词： Daxing’an Mountains Underground fire Moisture content Peak temperature Spread rate

Molecular characterization of glutaredoxin 2 from Ostrinia furnacalis

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Integrative Zoology 2013年第1期8卷 30-38页

作者： Shiheng AN Ying ZHANG tiantian wang Meihao LUO Chaohai LI College of Plant Protection Henan Agricultural UniversityZhengzhouChina College of Agronomy Henan Agricultural UniversityZhengzhouChina

Glutaredoxins(GRXs)play very important roles in maintaining intracellular redox *** the present study,the full-length cDNA sequence encoding GRX2,named OfurGRX2(GenBank accession ***393246),was obtained from Ostrinia furnacalis,using reverse transcription polymerase chain reaction and rapid amplification of cDNA *** analysis revealed that the open reading frame of OfurGRX2 consists of 351 nucleotides encoding 116 amino acid residues with a predicted molecular weight of 12.6 *** research revealed that OfurGRX2 shares a common active site,CPYC/CPFC,with other insect *** profiles revealed that OfurGRX2 is a ubiquitous gene expressed in insect heads,fat bodies,epidermises,mid guts and *** OfurGRX2 transcript peaked in 36-h larvae of 4th instars,and then suddenly declined in the molting *** treatment experiments revealed that 20-hydroxyecodyson(20e)significantly induces the expression of the OfurGRX2 transcript,whereas juvenile hormone(JH)counteracts 20e *** stress factors(including starvation,ultraviolet light,mechanical injury,Escherichia coli exposure,and high and low temperatures)dramatically induced OfurGRXGRX2 transcript expression,which confirmed for the first time that GRX2 play important roles in insecta during exposure to adverse environments.

关键词： gene regulation glutaredoxin Ostrinia furnacalis real-time polymerase chain reaction

Performance design of a cryogenic air separation unit for variable working conditions using the lumped parameter model

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Frontiers of Mechanical Engineering 2020年第1期15卷 24-42页

作者： Jinghua XU tiantian wang Qianyong CHEN Shuyou ZHANG Jianrong TAN State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China

Large-scale cryogenic air separation units(ASUs),which are widely used in global petrochemical and semiconductor industries,are being developed with high operating elasticity under variable working *** from discrete processes in traditional machinery manufacturing,the ASU process is continuous and involves the compression,adsorption,cooling,condensation,liquefaction,evaporation,and distillation of multiple *** feature indicates that thousands of technical parameters in adsorption,heat transfer,and distillation processes are correlated and merged into a large-scale complex system.A lumped parameter model(LPM)of ASU is proposed by lumping the main factors together and simplifying the secondary ones to achieve accurate and fast performance *** the basis of material and energy conservation laws,the piecewise-lumped parameters are extracted under variable working conditions by using ***–Sugeno(T–S)fuzzy interval detection is recursively utilized to determine whether the critical point is detected or not by using different *** with the traditional method,LPM is particularly suitable for“rough first then precise”modeling by expanding the feasible domain using fuzzy *** LPM,the performance of the air compressor,molecular sieve adsorber,turbo expander,main plate-fin heat exchangers,and packing column of a 100000 Nm3 O2/h large-scale ASU is enhanced to adapt to variable working *** designed value of net power consumption per unit of oxygen production(kW/(Nm3 O2))is reduced by 6.45%.

关键词： performance design air separation unit(ASU) lumped parameter model(LPM) variable working conditions T–S fuzzy interval detection

ubtor Mutation Causes Motor Hyperactivity by Activating mTOR Signaling in Zebrafish

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Neuroscience Bulletin 2021年第12期37卷 1658-1670页

作者： tiantian wang Mingshan Zhou Quan Zhang Cuizhen Zhang Gang Peng State Key Laboratory of Medical Neurobiology Ministry of Education Frontiers Center for Brain Scienceand Institutes of Brain ScienceFudan UniversityShanghai 200032China

Mechanistic target of rapamycin(mTOR)signaling governs important physiological and pathological processes key to cellular *** of mTOR negative regulators and subsequent over-activation of mTOR signaling are major causes underlying epileptic *** previous studies showed that UBTOR/KIAA1024/MINAR1 acts as a negative regulator of mTOR signaling,but whether UBTOR plays a role in neurological diseases remains largely *** therefore examined a zebrafish model and found that ubtor disruption caused increased spontaneous embryonic movement and neuronal activity in spinal interneurons,as well as the expected hyperactivation of mTOR signaling in early zebrafish *** addition,mutant ubtor larvae showed increased sensitivity to the convulsant pentylenetetrazol,and both the motor activity and the neuronal activity were *** phenotypic abnormalities in zebrafish embryos and larvae were rescued by treatment with the mTORC1 inhibitor *** together,our findings show that ubtor regulates motor hyperactivity and epilepsy-like behaviors by elevating neuronal activity and activating mTOR signaling.

关键词： Ubtor Hyperactivity Epilepsy mTOR Zebrafish