保持独立语言和关联码的映射（英文）

设X*是定义在有限字母表X上的自由半群,研究从X*到X*的同态映射,得到了保持ρe-独立语言,ρb-独立语言,关联码以及p-语言的条件.进一步完善了保持语言的同态映射的研究工作.

基于关联码机制的食品安全监管数据关联方法研究

本文研究并提出一种基于关联码的食品安全监管数据关联方法,将食品安全监管业务全链条业务数据整合起来,实现各环节、各单位、各系统数据有效关联,改变数据的碎片化、分散化、难以进行有效利用的状态,并以关联码为基础介绍了食品安全监管数据的关联方法,为食品安全数据的关联分析研判,为食品安全突发事件应急处置提供数据基础,更加准确定位事件直接影响和潜在风险,为突发事件处置提供科学依据。

不动产单元代码“一码关联”新建项目全生命周期管理与应用研究

针对用地建设项目各环节业务不协同、全周期信息关联弱、审批智能化支撑不足等问题,基于济南市实践做法,本文系统总结了利用“不动产单元代码”作为关联互认的关键字段,“一码关联”工程建设项目用地审批、土地供应、规划建设、竣工验收、确权登记、产权交易等全生命周期管理的实施路径,阐述其工作机制建设及实现方式,并结合工作实际,提出了深化不动产代码社会应用的对策建议。

异形卷烟包条二维码关联联机控制的研究

为了实现卷烟小盒和条盒二维码的精准关联,通过包装机控制系统与二维码采集系统联机联控方法,由控制系统对二维码系统发送读码命令,并接收二维码系统反馈的读码结果,对异常结果进行剔除处理。该方案控制简易,操作方便,能够实现良好的包条二维码关联和质量把控,可推广到其他类型产品的二维码关联控制上。

基于数据治理的“一码管地”建设模式初探

自然资源部门数据量的成倍增长,带来业务融合不够、数据标准不一、信息串联不足等一系列问题,如何建立数据的关联关系并将其转化为资产已成为业务管理工作中的重要问题。本文探索构建了一套以数据治理、赋码关联、平台应用为主要路径的“一码管地”体系,通过摸清业务数据资源底数,构建数据模型、算法引擎和赋码引擎,对“调、规、批、征、供、登”等全流程用地业务数据各阶段的土地要素进行赋码,建立空间关联关系,打通数据壁垒,掌握每个地块和项目的“前世今生”,全面追溯其时空及业务演化过程,实现“要素精准配置、审批便捷高效、资源合理利用”的建设目标,推动业务流程早办结、建设项目早落地、土地产出早获悉。结果表明:“一码管地”可解决用地业务数据分散、应用困难等问题,成效明显。

一种适用于关联质量检测的烟包输送挡板

二维码关联管理系统属于卷烟工业信息化技术领域,是行业推进数字化转型的一项重要工作,基于按需生码、可靠赋码、精准关联、过程追溯的原则,本次研究设计了一种适用于烟包二维码关联、质量检测的输送挡板,能够在实际生产过程中满足针对烟包侧面的二维码及外观质量的检测条件,确保关联信息的正确建立。在此之前,原设备构件结构未能适配相应的检测组件,无法满足对于烟包侧面二维码的检测。采用新的结构设计后,能够实现对于烟包侧面二维码信息采集、质量检测并进行后续的二维码关联工作。The QR code correlation management system is a significant development within the realm of information technology in the tobacco industry, representing a crucial step towards advancing digital transformation within this sector. This study has focused on designing a conveyor belt fence that is specifically tailored for correlating QR codes on cigarette packages and conducting quality inspections. The system operates based on principles of on-demand coding, reliable encoding, precise correlation, and process traceability. In practical production processes, this innovative system meets the stringent requirements for detecting QR codes and assessing exterior quality on cigarette pack sides. By doing so, it ensures the accurate establishment of correlated information. Prior to this development, the original equipment component structure was not compatible with corresponding detection components and could not meet the requirements for detecting QR codes on cigarette pack sides. With its new structural design, however, it becomes possible to collect QR code information from cigarette pack sides while also conducting thorough quality inspections. Subsequently, this enables seamless execution of QR code correlation work as part of an integrated approach to enhancing operational efficiency in tobacco manufacturing processes.

基于码书关联网络的基音调制信息隐藏检测

基音调制信息隐藏在进行基音预测时嵌入机密信息,可在低速率语音压缩编码过程中进行高隐蔽性的信息隐藏,文中试图对该种隐写进行检测.文中发现该种隐写将导致压缩语音流中相邻语音帧自适应码书的关联特性发生改变,文中以此为设计隐写分析算法的关键线索.为了量化该种关联特性,文中设计了码书关联网络模型并基于该模型得到了对隐写敏感的特征向量.最后,基于所得特征向量并结合SVM(Support Vector Machine,支持向量机)构建了隐写检测器.针对典型的低速率语音编码标准G.729以及G.723.1的实验表明,文中方法性能优于现有检测方法,实现了对基音调制信息隐藏的快速有效检测.

不动产单元代码在财产登记中的一码关联共享

随着营商环境和数据赋能在政府工作中的深入开展,不动产登记中的“不动产单元代码”作为各部门之间数据共享的索引编码,所扮演的角色和作用越来越重要。以不动产单元代码为切入点,实现贯穿工程建设项目管理全流程的“一码关联”不动产登记。

工程建设项目施工主材动态节超与数字化管控

通过制定施工企业成本内控的总体目标,分解工程量,创建快速算量系统,着重分析工程数量比选,找出有利于项目创益的因素;把主材的节超、进度管理、质量把控与互联网相结合起来,实现系统自动化与数字化管理,动态把握材料的管控,建立时间维度的节点进度计划,辅助工程质量验收的完成,实现业务数据化、数据资产化、资产价值化的企业内部共享、协同、决策能力、管理模式和商业模式的进步与转变,实现信息化的持续改进与提升,达到数字化转型的企业战略目标。

Automatic Search of Impossible Differentials and Zero-Correlation Linear Hulls for ARX Ciphers

In lightweight cryptographic primitives, round functions with only simple operations XOR, modular addition and rotation are widely used nowadays. This kind of ciphers is called ARX ciphers. For ARX ciphers, impossible differential cryptanalysis and zero-correlation linear cryptanalysis are among the most powerful attacks, and the key problems for these two attacks are discovering more and longer impossible differentials(IDs) and zero-correlation linear hulls(ZCLHs). However, finding new IDs and ZCLHs for ARX ciphers has been a manual work for a long time, which has been an obstacle in improving these two attacks. This paper proposes an automatic search method to improve the efficiency of finding new IDs and ZCLHs for ARX ciphers. In order to prove the efficiency of this new tool, we take HIGHT, LEA, SPECK three typical ARX algorithms as examples to explore their longer and new impossible differentials and zero-correlation linear hulls. To the best of our knowledge, this is the first application of automatic search method for ARX ciphers on finding new IDs and ZCLHs. For HIGHT, we find more 17 round IDs and multiple 17 round ZCLHs. This is the first discovery of 17 round ZCLHs for HIGHT. For LEA, we find extra four 10 round IDs and several 9 round ZCLHs. In the specification of LEA, the designers just identified three 10 round IDs and one 7round ZCLH. For SPECK, we find thousands of 6 round IDs and forty-four 6 round ZCLHs. Neither IDs nor ZCLHs of SPECK has been proposed before. The successful application of our new tool shows great potential in improving the impossible differential cryptanalysis and zero-correlation linear cryptanalysis on ARX ciphers..

Identification of refactoring opportunities for source code based on class association relationships

In order to deal with the complex association relationships between classes in an object-oriented software system,a novel approach for identifying refactoring opportunities is proposed.The approach can be used to detect complex and duplicated many-to-many association relationships in source code,and to provide guidance for further refactoring.In the approach,source code is first transformed to an abstract syntax tree from which all data members of each class are extracted,then each class is characterized in connection with a set of association classes saving its data members.Next,classes in common associations are obtained by comparing different association classes sets in integrated analysis.Finally,on condition of pre-defined thresholds,all class sets in candidate for refactoring and their common association classes are saved and exported.This approach is tested on 4 projects.The results show that the precision is over 96%when the threshold is 3,and 100%when the threshold is 4.Meanwhile,this approach has good execution efficiency as the execution time taken for a project with more than 500 classes is less than 4 s,which also indicates that it can be applied to projects of different scales to identify their refactoring opportunities effectively.

Dynamic inhomogeneous S-Boxes in AES: a novel countermeasure against power analysis attacks

Substitution boxes (S-Boxes) in advanced encryption standard (AES) are vulnerable to attacks bypower analysis.The general S-Boxes masking schemes in circuit level need to adjust the design flow andlibrary databases.The masking strategies in algorithm level view each S-Box as an independent moduleand mask them respectively,which are costly in size and power for non-linear characteristic of S-Boxes.The new method uses dynamic inhomogeneous S-Boxes instead of traditional homogeneous S-Boxes,andarranges the S-Boxes randomly.So the power and data path delay of substitution unit become unpre-dictable.The experimental results demonstrate that this scheme takes advantages of the circuit character-istics of various S-Box implementations to eliminate the correlation between crypto operation and power.Itneeds less extra circuits and suits resource constrained applications.

Statistical Analysis on the Corner Period of Site-Related Design Spectra

According to the results of site seismic hazard analysis accomplished in the past decades, 96 site-related design spectra are selected as samples in this study. The result shows that the value of the corner period (T g) of the design spectrum in GBJ11-89 (China Seismic Building Code, issued in 1989) is lower than the value obtained by site seismic hazard analysis. The same situation exists when we compare the design spectra of the Codes to the spectra according to the earthquake records. The value in current seismic design code, GBJ50011-2001 issued in 2001, is greater than that in GBJ11-89, but still less than the value obtained by site seismic hazard analysis. If we accept the value got by site seismic hazard analysis, we have a suspicion that 2/3 of buildings built according to GBJ11-89 will not be safe when an earthquake with 2% probability of exceedance in 50 years occurs.

Weak Correlation Dictionary Construction Method for Sparse Coding

For sparse coding, the weaker the correlation of dictionary atoms is, the better the representation capacity of dictionary will be. A weak correlation dictionary construction method for sparse coding has been proposed in this paper. Firstly, a new dictionary atom initialization is proposed in which data samples with weak correlation are selected as the initial dictionary atoms in order to effectively reduce the correlation among them.Then, in the process of dictionary learning, the correlation between atoms has been measured by correlation coefficient, and strong correlation atoms have been eliminated and replaced by weak correlation atoms in order to improve the representation capacity of the dictionary. An image classification scheme has been achieved by applying the weak correlation dictionary construction method proposed in this paper. Experimental results show that, the proposed method averagely improves image classification accuracy by more than 2%, compared to sparse coding spatial pyramid matching(Sc SPM) and other existing methods for image classification on the datasets of Caltech-101, Scene-15, etc.