检索结果-南通市图书馆

Parametric study of thermo-hydro-mechanical response of claystone with consideration of steel corrosion

在线全文

学校读者我要写书评

暂无评论

journal of Rock Mechanics and Geotechnical Engineering 2017年第3期9卷 67-80页

作者： Y.jia H.B.Bian G.Duveau j.f.shao Laboratory of Mechanics of Lille University of Lille Cité Scientifique Villeneuve-d’Ascq 59655 France LEM3 UMR CNRS 7239 Université de Lorraine Ile du Saulcy Metz 57045 France

In this paper,the thermo-hydro-mechanical(THM)response of claystone is studied via a series of parametric studies,considering the evolution of mechanical properties and deformation behavior of corroded *** numerical simulations are performed by using a coupled THM finite element code and two different constitutive models:a visco-elastoplastic model for geological formation and a von Mises type model for steel *** mechanical properties and deformation behavior of corroded steel are described in a conceptual ***,a disposal tunnel supported by a steel liner is studied and a series of parametric studies is defined to demonstrate the corrosion effects of steel liner on the THM response of the *** comparison of different numerical calculations exhibits that the volumetric expansion related to corrosion products has an important impact on the stress and displacement fields in the claystone surrounding the disposal ***,the evolutions of temperature and liquid pressure in the claystone are essentially controlled by its THM properties and independent of the steel corrosion.

关键词： Claystone Steel corrosion Thermo-hydro-mechanical(THM) coupling Disposal tunnel Corrosion rate Volumetric expansion of corrosion products

在线全文

学校读者我要写书评

暂无评论

沉积岩的一种各向异性模型

岩土力学 2002年第1期23卷 47-50页

作者：余天堂卢应发 j.f.shao S.Pietruszczak 河海大学土木工程学院江苏南京210098 中国科学院武汉岩土力学研究所湖北武汉430071 LaboratoiredeMechaniquedeLille McMasterUniversity

给出了沉积岩的一种各向异性模型。用一个各向异性参数描述这类材料的固有各向异性,各向异性参数和单轴抗压强度是一个分布函数,其分布用一个微结构张量和加载方向表示。建立了一个描述各向异性沉积岩变形过程的全塑性模型。用该模型对... 详细信息

给出了沉积岩的一种各向异性模型。用一个各向异性参数描述这类材料的固有各向异性,各向异性参数和单轴抗压强度是一个分布函数,其分布用一个微结构张量和加载方向表示。建立了一个描述各向异性沉积岩变形过程的全塑性模型。用该模型对一些三轴试验进行了模拟,结果表明该模型能有效地描述沉积岩的固有各向异性。

关键词：沉积岩各向异性模型微结构张量

Performance and Evaluation of the Inverted A~2/O Process Used for Municipal Wastewater Treatment

在线全文

学校读者我要写书评

暂无评论

Performance and Evaluation of the Inverted A~2/O Process Use...

BSAlign:A Library for Nucleotide Sequence Alignment

2011 International Symposium on Water Resource and Environmental Protection(ISWREP 2011)

作者： S.P.Wang N.j.Huang j.f.shao D.C.Peng A.N.Su H.f.Lu B.H.Yin Xi’an Municipal Engineering Design ＆ Research Institut School of Environmental and Municipal Engineering Xian University of Architecture and Technology The No.3 Wastewater Treatment Plant of Xi’an City Shannxi Xi’an China The No.4 Wastewater Treatment Plant of Xi’an City Xi’an China

Based on the monitoring of the main water quality parameters in the inverted A2 /O process employed in The No.4 Wastewater Treatment Plant of Xi’an City,this paper mainly analyzed contaminant removals during over half a year *** results demonstrated that the total removal efficiencies of CODcr,TN,NH3-N,TP and SS could reach to 90.5%,65.2%,82.0%,54.8% and 95.8%,*** addition,the treatment process showed a strong resistance for loading impact,resulting in relatively stable effluent ***,a lower removal efficiency of TP in the bioreactor and sludge floating in the secondary settling tank were *** deep analyzing,some countermeasures were ***,it is expected that the conclusions derived from this study may be valuable for design and operation management of the similar Wastewater Treatment Plants in the future.

关键词： municipal wastewater Inverted A2 /O process nitrogen and phosphorus removals.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2024年第2期22卷 135-142页

作者： Haojing shao jue Ruan Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Increasing the accuracy of the nucleotide sequence alignment is an essential issue in genomics *** classic dynamic programming(DP)algorithms(e.g.,Smith–Waterman and Needleman–Wunsch)guarantee to produce the optimal result,their time complexity hinders the application of large-scale sequence *** optimization efforts that aim to accelerate the alignment process generally come from three perspectives:redesigning data structures[e.g.,diagonal or striped Single Instruction Multiple Data(SIMD)implementations],increasing the number of parallelisms in SIMD operations(e.g.,difference recurrence relation),or reducing search space(e.g.,banded DP).However,no methods combine all these three aspects to build an ultra-fast *** this study,we developed a Banded Striped Aligner(BSAlign)library that delivers accurate alignment results at an ultra-fast speed by knitting a series of novel methods together to take advantage of all of the aforementioned three perspectives with highlights such as active f-loop in striped vectorization and striped move in banded *** applied our new acceleration design on both regular and edit distance pairwise *** achieved 2-fold speed-up than other SIMD-based implementations for regular pairwise alignment,and 1.5-fold to 4-fold speed-up in edit distance-based implementations for long *** is implemented in C programing language and is available at https://***/ruanjue/bsalign.

关键词： Pairwise alignment Edit distance Striped vectorization Banded dynamic programming f evaluation

Multicolored Bipartite Ramsey Numbers of Large Cycles

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第2期40卷 347-357页

作者： shao-qiang LIU Yue-jian PENG College of Mathematics and Statistics Hanshan Normal UniversityChaozhou 521041China School of Mathematics Hunan UniversityChangsha 410082China

for an integer r≥2 and bipartite graphs Hi,where 1≤i≤r,the bipartite Ramsey number br(H1,H2,…,Hr)is the minimum integer N such that any r-edge coloring of the complete bipartite graph KN;N contains a monochromatic subgraph isomorphic to Hi in color i for some 1≤i≤*** show that if r≥3;α1,α2>0,αj+2≥[(j+2)!-1]Σi=1^(j+1)α1 for j=1,2…r-2,then br(C2[α1n],C2[α2n],…,C2[αrn]=(Σ=j=1^(r)a j+o(1))n.

关键词： ramsey number bipartite ramsey number regularity lemma

Effect of the interval between two shocks on ejecta formation from the grooved aluminum surface

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第3期33卷 147-159页

作者： Mingyang Xu jianli shao Weidong Song Enling Tang School of Equipment Engineering Shenyang Ligong UniversityShenyang 110159China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

This work focuses on the effect of the interval between two shocks on the ejecta formation from the grooved aluminum(Al_(1100))surface by using smoothed particle hydrodynamics numerical *** unsupported shocks are obtained by the plate-impact between sample and two flyers at interval,with a peak pressure of approximately 30 GPa for each *** the shock interval varies from 2.11 to 7.67 times the groove depth,the bubble velocity reduces to a constant,and the micro jetting factor R_(j) from spike to bubble exhibits a non-monotonic change that decreases initially and then *** a shock interval of 3.6 times the groove depth,micro jetting factor R_(j) from spike to bubble reaches its minimum value of approximately ***,the micro jetting factor R_(f) from spike to free surface decreases linearly at first,and stabilizes around 0.25 once the shock interval surpasses 4.18 times the groove *** the shock interval is less than 4.18 times the groove depth,the unloading wave generated by the breakout of the first shock wave is superimpose with the unloading part of the second shock wave to form a large tensile area.

关键词： Ejecta Microjet Two shocks Interval Smoothed particle hydrodynamics

Resistive field generation in intense proton beam interaction with solid targets

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第1期9卷 35-43页

作者： W.Q.Wang j.j.Honrubia Y.Yin X.H.Yang f.Q.shao Department of Physics National University of Defense TechnologyHunanChina ETSI Aeronáutica y del Espacio Universidad Politécnica de MadridMadridSpain Department of Nuclear Science and Technology National University of Defense TechnologyHunanChina

The Brown-Preston-Singleton(BPS)stopping power model is added to our previously developed hybrid code to model ion beam-plasma *** simulations show that both resistive field and ion scattering effects are important for proton beam transport in a solid target,in which they compete with each *** the target is not completely ionized,the self-generated resistive field effect dominates over the ion scattering ***,when the target is completely ionized,this situation is ***,it is found that Ohmic heating is important for higher current densities and materials with high *** energy fraction deposited as Ohmic heating can be as high as 20%-30%.Typical ion divergences with half-angles of about 5°-10°will modify the proton energy deposition substantially and should be taken into account.

关键词： interaction beam intense

Synergistic silver-mediated and palladium-catalyzed nondirected olefination of aryl C–H bond: quick access to multi-substituted aryl olefins

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第3期67卷 882-889页

作者： jian Yao Lili shao Xiaohong Huo Xiaoming Wang Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Transition metal-catalyzed olefination of aryl C-H bond is a powerful tool for the synthesis of alkenes. While the Pd-catalyzed oxidative C-H olefination of arenes, also known as fujiwara-Moritani reaction, has been established as one of the most efficient methods, the substrates are largely limited to terminal olefins with electron-withdrawing group(s). Herein, we report a synergistic silver-mediated and palladium-catalyzed non-directed C-H olefination of arenes with vinyl(pseudo)halides, which offers a complementary strategy to the typical fujiwara-Moritani reaction. The reactions proceeded well for a variety of halogenated arenes, heteroarenes, and olefin substrates, providing an efficient access to various multi-substituted aryl olefins, including trisubstituted/tetrasubstituted olefins and several complex olefins derived from medicines or natural products. Mechanistic studies indicated a bimetallic Pd/Ag cooperation is operative in the catalysis, i.e., the reaction is initiated by aryl C-H bond cleavage via ligation with phosphine/Ag species, followed by transferring of the aryl moiety to a vinyl palladium intermediate,which is in turn formed by oxidative addition of vinyl(pseudo)halide to a Pd complex. This method enables the synthesis of a wide range of challenging multi-substituted vinyl products from simple arenes(directing-group free) in a streamlined and controllable fashion.

关键词： direct C–H olefination multi-substituted aryl alkenes bimetallic Pd/Ag cooperation C–H functionalization

A Sharding Scheme Based on Graph Partitioning Algorithm for Public Blockchain

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第6期139卷 3311-3327页

作者： Shujiang Xu Ziye Wang Lianhai Wang Miodrag j.Mihaljevi′c Shuhui Zhang Wei shao Qizheng Wang Key Laboratory of Computing Power Network and Information Security Ministry of EducationShandong Computer Science CenterQilu University of Technology(Shandong Academy of Sciences)Jinan250014China Shandong Provincial Key Laboratory of Computer Networks Shandong Fundamental Research Center for Computer ScienceJinan250014China Mathematical Institute The Serbian Academy of Sciences and ArtsBelgrade11000Serbia

Blockchain technology,with its attributes of decentralization,immutability,and traceability,has emerged as a powerful catalyst for enhancing traditional industries in terms of optimizing business ***,transaction performance and scalability has become the main challenges hindering the widespread adoption of *** to its inability to meet the demands of high-frequency trading,blockchain cannot be adopted in many *** improve the transaction capacity,researchers have proposed some on-chain scaling technologies,including lightning networks,directed acyclic graph technology,state channels,and shardingmechanisms,inwhich sharding emerges as a potential scaling ***,excessive cross-shard transactions and uneven shard workloads prevent the sharding mechanism from achieving the expected *** paper proposes a graphbased sharding scheme for public blockchain to efficiently balance the transaction *** crossshard transactions and evening-out workloads among shards,the scheme reduces transaction confirmation latency and enhances the transaction capacity of the ***,the scheme can achieve a high-frequency transaction as well as a better blockchain *** results show that the scheme effectively reduces the cross-shard transaction ratio to a range of 35%-56%and significantly decreases the transaction confirmation latency to 6 s in a blockchain with no more than 25 shards.

关键词： Blockchain sharding graph partitioning algorithm