检索结果-南通市图书馆

基于***技术、量子遗传算法的物流调度管理系统设计与实现

在线全文

学校读者我要写书评

暂无评论

信息技术与信息化 2024年第8期 65-68页

作者：李清忠南昌理工学院江西南昌330044

随着大数据及云计算技术、人工智能技术在国内的迅猛发展,物流行业也广泛应用***软件开发技术、B/S(browser/server)系统结构、SQL Server数据库等软硬件开发出符合物流企业车辆运输调度、物流信息管理的数字化服务系统。基于此,利用We... 详细信息

随着大数据及云计算技术、人工智能技术在国内的迅猛发展,物流行业也广泛应用***软件开发技术、B/S(browser/server)系统结构、SQL Server数据库等软硬件开发出符合物流企业车辆运输调度、物流信息管理的数字化服务系统。基于此,利用Web应用程序的***分布式框架、B/S结构、SQL Server关系型数据库、IIS8服务器、COM组件等软硬件工具,建构起可用于物流企业客户订单管理、出库/入库管理、车辆调度管理的信息化服务系统,运用量子遗传算法建立物流企业的配送车辆路径规划模型、车辆优化调度寻优方案,进而提升物流企业配送车辆调度、物流信息资源管理的效率与质量。

关键词： ***技术量子遗传算法物流信息化管理系统设计

An efficient atomic cross-chain commitment resisting fork fraud

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2023年第5期17卷 241-243页

作者： Fuqi JIN Wenquan li Lanju KONG qingzhong li School of Software Shandong UniversityJinan 250101China Research Center Dareway Co. Ltd.Jinan 250102China

1 Introduction Cross-chain transaction,as an essential component of blockchain technology,enables value exchange cross blockchains[1].Atomic cross-chain transaction technology has mainly encountered two challenges:efficiency and *** challenges usually include the pressures on storage,transaction fees(e.g.,gas)or throughput,*** challenges refer to the requirement that the assets traded must be obtained by the intended person for an intended *** which fork fraud is one of the specialized problems,which refers to attackers obtaining assets that should not be obtained by manipulating blockchain *** cross-chaining solutions today are not aware of such malicious *** this study,we propose EAC3,an Efficient Atomic CrossChain Commitment that can resist fork *** introducing a new resource multiplexing strategy,and redesigning the crosschain transaction process,EAC3 can effectively reduce various transaction overheads,and keep the possibility that attackers obtaining assets through secretly manipulating a chain fork at a safe level.

关键词： cross specialized enable

Synergic Mechanism of an Organic Corrosion Inhibitor for Preventing Carbon Steel Corrosion in Chloride Solution

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2015年第2期30卷 325-330页

作者：刘志勇 YU Lei li qingzhong School of Civil Engineering Yantai University School of Chemistry and Chemical Engineering Yantai University

The inhibition effect of dimethylethanolamine（DMEA） and its composite with carboxylic acid was studied with the electrochemical tests. The experimental results indicate that DMEA is not a good inhibitor but the composite of DMEA with caprylic acid exhibits excellent inhibiting efficiency. The synergic mechanism of the organic corrosion inhibitors（OCIs） was studied with quantum chemical calculations. It is found that the DMEA forms a quaternary ammonium salt with the proton in carboxylic acid, and a cyclic complex formed between the salt and Fe may be responsible for the enhancement of inhibiting efficiency. The possible hydrogen bond formed between DMEA and carboxylic acid is not enough for the inhibiting effect. This work is helpful to proposing theoretical interpretation as well as developing a functional organic inhibitor to improve the durability of reinforced concrete contaminated with chloride.

关键词： carbon steel organic corrosion inhibitor polarization inhibition chloride solution

Halogen Bond Catalysis on Carbonyl-Olefin Ring-Closing Metathesis Reaction:Comparison with Lewis Acid Catalysis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2022年第11期40卷 1275-1284页

作者： Ying li Yuanyuan Sun lingpeng Meng qingzhong li Yanli Zeng College of Chemistry and Materials Science Hebei Key Laboratory of Inorganic Nano-materialsHebei Normal UniversityShijiazhuangHebei 050024China The Laboratory of Theoretical and Computational Chemistry College of Chemistry&Chemical EngineeringYantai UniversityYantaiShandong 264005China

The carbonyl-olefin ring-closing metathesis reactions have become a powerful tool for carbon-carbon bond *** this work,the halogen bond catalysis and classical Lewis acid catalysis on the carbonyl-olefin ring-closing metathesis reaction were investigated by density function *** both the halogen bond catalysis and classical Lewis acid catalysis,the carbonyl-olefin ring-closing me-tathesis reaction occurs by[2+2]-cycloaddition process and[2+2]-cycloreversion process,the reaction energy barriers are low,there-fore,it can be performed easily at room *** essential difference of the two kinds of catalysts is that the catalytic mecha-nism of halogen bond catalysis is mainly contribution of electrostatic interaction,while that of classical Lewis acid catalysis is mainly catalyzed by orbital *** halogen bond donor catalysts(ICI_(3),IF_(3))are expected to be efficient catalysts for the reaction and further promote the chemical synthesis of carbonyl-olefin ring-closing metathesis reaction.

关键词： Halogen bond donors Lewis acids Electrostatic interactions Orbital interaction Carbonyl-olefin ring-closing metathesis

A Hybrid Territorial Aquatic Bionic Soft Robot with Controllable Transition Capability

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

Journal of Bionic Engineering 2023年第2期20卷 568-583页

作者： qingzhong li Fukang Zhang Zeying Jing Fujie Yu Yuan Chen Department of Mechatronics and Information Engineering Shandong University at WeihaiWeihai264209China

In this paper,a bionic mantis shrimp amphibious soft robot based on a dielectric elastomer is proposed to realize highly adaptive underwater multimodal *** the action of an independent actuator,it is not only able to complete forward/backwards motion on land but also has the ability of cyclically controllable transition motion from land to water surface,from water surface to water bottom and from water bottom to *** fastest speed of the soft robot on land is 170 mm/s,and it can crawl while carrying up to 4.6 times its own *** maximum speeds on the water surface and the water bottom are 30 mm/s and 14.4 mm/s,***,the soft robot can climb from the water bottom with a 9°slope transition to *** with other similar soft robots,this soft robot has outstanding advantages,such as agile speed,large load-carrying capacity,strong body flexibility,multiple motion modes and strong underwater ***,nonlinear motion models of land crawling and water swimming are proposed to improve the environmental adaptability under multiple modalities,and the correctness of the theoretical model is verified by experiments.

关键词： Transition Amphibious soft robot Dielectric elastomers Bionic mantis shrimp soft robot

A research study on the spallation strength of LY12 aluminum under the pre-compression condition

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(Physics,Mechanics & Astronomy) 2012年第3期55卷 505-513页

作者： ShiWen Zhang Cangli liu qingzhong li JinSong Hua Qiao liu Inst Fluid Phys Lab Shock Wave & Detonat Phys Res Mianyang 621900 Peoples R China

To pre-compress the disk-shaped LY12 samples along the radial direction can be done with the aid of overstress assembly by heating or by mechanical clamping, which can also generate the deviatoric stress fields under different states. The spallation signals of these pre-compressed samples are measured by VISAR in the light-gas gun shock experiments. The experimental results show that even under the same impact velocity, the pullback amplitudes of the velocity at the free surface of the sam- pies vary significantly. According to the experimental data, we propose a distinct concept that the material spallation strength is closely related to the deviatoric stress fields in the material. Based on the numerical simulation, we develop a damage con- stitutive model, which reveals that the deviatoric stress reduces the tensile threshold of the void growth. The numerical inves- tigations also demonstrate that the spallation strength decreases as pre-compression increases. The experimental idea proposed in this paper can also be used to study the spallation process in other structures.

关键词： LY12 aluminum spallation strength pre-compression spherical spallation

在线全文

学校读者我要写书评

暂无评论

基于ADS的微系统电源完整性仿真及优化

电子技术应用 2024年第5期50卷 7-12页

作者：吕超华李庆忠时广轶江南大学机械工程学院江苏无锡214122 无锡北微传感科技有限公司江苏无锡214072

随着芯片制造技术和封装技术的发展,电子产品内部的器件集成度和信号速度在持续提高,微系统成为一种新兴的形式,这导致了对电源完整性的要求不断提高。不合理的电源完整性设计将会给电源质量和信号质量带来极大的干扰,甚至会使系统崩溃... 详细信息

随着芯片制造技术和封装技术的发展,电子产品内部的器件集成度和信号速度在持续提高,微系统成为一种新兴的形式,这导致了对电源完整性的要求不断提高。不合理的电源完整性设计将会给电源质量和信号质量带来极大的干扰,甚至会使系统崩溃。针对所设计的多芯片微系统设计进行了电源完整性的仿真,并利用基板、PCB去耦电容网络协同去耦的方式对电源分配网络阻抗进行了优化,解决了微系统内部的空间有限与去耦电容需求量大的矛盾,保证了微系统的电源完整性。

关键词：电源完整性电源分配网络阻抗去耦电容

Heterogeneous Network-Based Chronic Disease Progression Mining

在线全文

学校读者我要写书评

暂无评论

Big Data Mining and Analytics 2019年第1期2卷 25-34页

作者： Chenfei Sun qingzhong li lizhen Cui Hui li Yuliang Shi Research Center of Software and Data Engineering Shandong University

Healthcare insurance fraud has caused billions of dollars in losses in public healthcare funds around the world. In particular, healthcare insurance fraud in chronic diseases is especially rampant. Understanding disease progression can help investigators detect healthcare insurance frauds early on. Existing disease progression methods often ignore complex relations, such as the time-gap and pattern of disease occurrence. They also do not take into account the different medication stages of the same chronic disease, which is of great help when conducting healthcare insurance fraud detection and reducing healthcare costs. In this paper, we propose a heterogeneous network-based chronic disease progression mining method to improve the current understanding on the progression of chronic diseases, including orphan diseases. The method also considers the different medication stages of the same chronic disease. Extensive experiments show that our method can outperform the existing methods by 20% in terms of F-measure.

关键词： disease progression heterogeneous network healthcare insurance fraud

一种基于Hybrid软件包的大数据平台管理方法

在线全文

学校读者我要写书评

暂无评论

信息技术与信息化 2024年第7期 174-177页

作者：卢国庆吴波李庆忠贾云强赵兵浪潮通信信息系统有限公司山东济南250100

信创环境下,大数据平台安全问题趋于严峻。在应对以修复安全漏洞为代表的大数据平台管理时,开源项目Apache Ambari+Bigtop为代表的原生软件包RPM/DEB方法和少数平台产品为代表的原生软件包Tarball方法在兼顾开源和降本增效方面均有不足... 详细信息

信创环境下,大数据平台安全问题趋于严峻。在应对以修复安全漏洞为代表的大数据平台管理时,开源项目Apache Ambari+Bigtop为代表的原生软件包RPM/DEB方法和少数平台产品为代表的原生软件包Tarball方法在兼顾开源和降本增效方面均有不足。对此,提出了一种基于混合软件包的大数据平台管理方法HPM。首先,提出混合软件包集成方法,基于Apache Ambari最小化二次开发实现软件包Tarball到RPM/DEB的等价映射,全面拥抱开源的前提下兼容多种大数据管理场景。其次,利用发行版本定义方法,抑制发行版本数量膨胀,可实现发行版本数量降低至少一个数量级。实验结果验证了所提出方法在大数据平台管理的降本增效方面具有较好的效果。

关键词：大数据平台安全漏洞原生软件包混合软件包发行版本