J. Appl. Math.最新文献_第4页

SQLite Encryption Method for Embedded Databases Based on Chaos Algorithm 基于混沌算法的嵌入式数据库SQLite加密方法

J. Appl. Math. Pub Date : 2023-02-17 DOI: 10.1155/2023/5187602

Junlong Shi

{"title":"SQLite Encryption Method for Embedded Databases Based on Chaos Algorithm","authors":"Junlong Shi","doi":"10.1155/2023/5187602","DOIUrl":"https://doi.org/10.1155/2023/5187602","url":null,"abstract":"With the widespread use of embedded systems, chaos is a nonlinear system with certainty and complexity. It is an important topic in the field of information security at present, and it is an effective way to apply to embedded systems. It has great practical value in theory and in practice. This research mainly focuses on the encryption technology of SQLite embedded database and proposes an improved sparrow algorithm (Logistic Chaos Sparrow Search Algorithm, LCSSA) based on Logistic Chaos Map. It shows that the security level of SQLite in web development is higher than that of conventional Access. The population is initialized by the logistic chaotic mapping method, which improves the quality of the initial solution, increases the diversity of the population, and reduces the risk of premature maturity of the algorithm. The initial value \u0000 \u0000 \u0000 \u0000 y\u0000 \u0000 \u0000 0\u0000 \u0000 \u0000 \u0000 determines the encryption method of the nonlinear function. Taking the integer variable (int) as an example, the value range is -231~231. It can be seen that the key space is sufficient to prevent various conventional attacks. When the key is the wrong key, decryption will not yield any data. It can be found that encryption and decryption are very sensitive to the key, which is also determined by the sensitivity of chaotic encryption system to the initial value. The benchmark function compares the performance of the improved algorithm with the algorithm before the improvement and compares it with the SSA. The LCSSA has better convergence performance, higher accuracy, and better stability.","PeriodicalId":14766,"journal":{"name":"J. Appl. Math.","volume":"23 1","pages":"5187602:1-5187602:10"},"PeriodicalIF":0.0,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91184763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lip Print Recognition Algorithm Based on Convolutional Network 基于卷积网络的唇印识别算法

J. Appl. Math. Pub Date : 2023-02-10 DOI: 10.1155/2023/4448861

Hongcheng Zhou

引用次数: 0

The Dynamics of a Delayed Ecoepidemiological Model with Nonlinear Incidence Rate 具有非线性发病率的延迟生态流行病学模型的动力学

J. Appl. Math. Pub Date : 2023-02-10 DOI: 10.1155/2023/1366763

R. M. Hussien, R. K. Naji

引用次数: 2

Mathematical Model for Crimes in Developing Countries with Some Control Strategies 发展中国家犯罪的数学模型及其控制策略

J. Appl. Math. Pub Date : 2023-02-07 DOI: 10.1155/2023/8699882

Bilali Mataru, O. J. Abonyo, D. Malonza

{"title":"Mathematical Model for Crimes in Developing Countries with Some Control Strategies","authors":"Bilali Mataru, O. J. Abonyo, D. Malonza","doi":"10.1155/2023/8699882","DOIUrl":"https://doi.org/10.1155/2023/8699882","url":null,"abstract":"Crime is one among the most challenging problems in most developing countries in which unemployment is among the causes. Not all kind of crimes can be eradicated indeed; this paper is intended to contribute on eradication of unemployment-related crimes in the developing countries by proposing a deterministic mathematical model of unemployment-crime dynamics including vocational training and employment as control measures for crime. The study adopts the epidemiological model concepts on model formulation and model analysis while considering unemployment as main driver of crime. The basic properties of the model are analyzed, and well-posed of the model is established by using the Lipschitz condition. The next-generation matrix is used to obtain the criminal reproduction number which help to derive the conditions for local and global stability of the model. Moreover, the existence of backward and forward bifurcation when the crime reproduction number is equal to one was analyzed by center manifold theory. Simulations of the model are carried out to validate the theoretical part of the model and demonstrate vocational training, and employment strategies are more effective in combating crime when applied simultaneously. The findings suggest that unemployment problem should be addressed in order to reduce the number of unemployed individuals in joining the criminal activities.","PeriodicalId":14766,"journal":{"name":"J. Appl. Math.","volume":"128 1","pages":"8699882:1-8699882:14"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78751620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Predicting COVID-19 Pandemic Endpoint in Some Sub-Saharan African and European Countries 预测一些撒哈拉以南非洲和欧洲国家的COVID-19大流行终点

J. Appl. Math. Pub Date : 2023-01-24 DOI: 10.1155/2023/7882843

Saviour Worlanyo Akuamoah, John Coker Ayimah, D. Yaro, Elikem Kofi Krampa, Awura Amma Adomaa Danso

引用次数: 0

Improvements of Logarithmic and Identric Mean Inequalities for Scalars and Operators 对标量和算子的对数和同等均值不等式的改进

J. Appl. Math. Pub Date : 2023-01-19 DOI: 10.1155/2023/5195233

Aliaa Burqan, Abeer Abu-Snainah, Rania Saadeh

引用次数: 1

On a Solution of a Third Kind Mixed Integro-Differential Equation with Singular Kernel Using Orthogonal Polynomial Method 第三类奇异核混合积分-微分方程的正交多项式解法

J. Appl. Math. Pub Date : 2023-01-12 DOI: 10.1155/2023/5163398

Ahmad Alalyani, M. A. Abdou, M. Basseem

{"title":"On a Solution of a Third Kind Mixed Integro-Differential Equation with Singular Kernel Using Orthogonal Polynomial Method","authors":"Ahmad Alalyani, M. A. Abdou, M. Basseem","doi":"10.1155/2023/5163398","DOIUrl":"https://doi.org/10.1155/2023/5163398","url":null,"abstract":"This paper deals with the solution of a third kind mixed integro-differential equation (MIDE) in displacement type in space \u0000 \u0000 \u0000 \u0000 L\u0000 \u0000 \u0000 2\u0000 \u0000 \u0000 \u0000 \u0000 −\u0000 1\u0000 ,\u0000 1\u0000 \u0000 \u0000 ×\u0000 C\u0000 \u0000 \u0000 0\u0000 ,\u0000 T\u0000 \u0000 \u0000 ,\u0000 T\u0000 <\u0000 1\u0000 \u0000 . The singular kernel is modified to take a logarithmic form, while the kernels of time are continuous and positive functions. Using the separation of variables technique, we have a system of Fredholm integral equations (FIEs) that can be transformed into an algebraic system after using orthogonal polynomials. In all the previous researchers’ works, the time periods were divided, and the mixed equation transformed into an algebraic system of FIEs. While when using the separation method, we are able to obtain FIE with time coefficients, and these functions are described as an integral operator in time. Thus, we can study the behavior of the solution with the time dimension in a broader and deeper than the previous one. Some examples are given and discussed to show the performance and efficiency of the proposed methods.","PeriodicalId":14766,"journal":{"name":"J. Appl. Math.","volume":"8 1","pages":"5163398:1-5163398:9"},"PeriodicalIF":0.0,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80235869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modelling the Impact of Human Population and Its Associated Pressure on Forest Biomass and Forest-Dependent Wildlife Population 模拟人口及其相关压力对森林生物量和依赖森林的野生动物种群的影响

J. Appl. Math. Pub Date : 2023-01-12 DOI: 10.1155/2023/4826313

Ibrahim M. Fanuel, Damian Kajunguri, F. Moyo

{"title":"Modelling the Impact of Human Population and Its Associated Pressure on Forest Biomass and Forest-Dependent Wildlife Population","authors":"Ibrahim M. Fanuel, Damian Kajunguri, F. Moyo","doi":"10.1155/2023/4826313","DOIUrl":"https://doi.org/10.1155/2023/4826313","url":null,"abstract":"Mathematical models have been widely used to explain the system originating from human-nature interaction, investigate the impacts of various components, and forecast system behaviour. This paper provides a profound reference to the current state of the art regarding the application of mathematical models to study the impact of human population and population pressure on forest biomass and forest-dependent wildlife. The review focused on two aspects, namely, model formulation and model analysis. In model formulation, the review revealed that socioeconomic status influences forest resource consumption patterns, thus, stratification of the human population based on economic status is a critical phenomenon in modelling human-nature interactions; however, this component has not been featured in the reviewed models. Regarding model analysis, in most of the reviewed work, single parameter approach was utilized to perform uncertainty quantification of the model parameter; this approach has been proven to be inadequate in measuring the uncertainty and sensitivity of the parameter. Thus, the use of correlation or variance based methods, which are multidimensional parameter space methods are of significant importance. Generally, despite the limitations of many assumptions in mathematical modelling, it is revealed that mathematical models demonstrate the ability to handle complex systems originating from interactions between humans and nature.","PeriodicalId":14766,"journal":{"name":"J. Appl. Math.","volume":"30 1","pages":"4826313:1-4826313:9"},"PeriodicalIF":0.0,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80888822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Data Fusion and Processing Technology of Wireless Sensor Network for Privacy Protection 面向隐私保护的无线传感器网络数据融合与处理技术

J. Appl. Math. Pub Date : 2023-01-01 DOI: 10.1155/2023/1046050

Lusheng Shi, K. Li, Huibo Zhu

引用次数: 0

Average-Based Fuzzy Time Series Markov Chain Based on Frequency Density Partitioning 基于频率密度划分的平均模糊时间序列马尔可夫链

J. Appl. Math. Pub Date : 2023-01-01 DOI: 10.1155/2023/9319883

S. Hariyanto, Y. D. Sumanto, S. Khabibah, Zaenurrohman

引用次数: 0