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Survey on the investigation of forensic crime scene evidence 司法犯罪现场证据调查研究综述
Pub Date : 2022-03-28 DOI: 10.1142/s1793962322500477
Jyothi Johnson, R. Chitra
Determining and proving that a specific person or several persons may or may not be there at the Crime Scene (CS) in every criminal investigation are vital. Thus, in the law enforcement community, more often the physical evidence is collected, preserved, and analyzed. The accused cannot be predicted by normal people or judge just by looking at the evidence obtained at the analysis phase. So, research studies were undertaken on automated recognition as well as retrieval system aimed at forensic Crime Scene Investigation (CSI). A survey on the investigation of forensic CS evidence is depicted here. The main focus is rendered on the computer-centered automated investigation system. The latest research on the different evidence-centered Forensic Investigation (FI), such as the face, Finger-Print (FP), shoeprint, together with other Foot-Wear (FW) impressions, Machine Learning (ML) algorithm-centered FI, ML-centered pattern recognition, features of disparate evidence in forensic CSI, and various matching technique-centered FI, is surveyed here. Finally, centered on the accuracy and other two metrics, the methods’ performance for CSI is compared. Out of all the other methods, OLBP + LSSVM produced better results for precision and recall followed by CLSTM. In terms of accuracy, CLSTM produced better results than any other method.
在每次刑事调查中,确定并证明一个特定的人或几个人可能在或可能不在犯罪现场(CS)是至关重要的。因此,在执法部门,更多的是收集、保存和分析物证。正常人无法预测被告,也无法仅凭分析阶段获得的证据作出判断。因此,针对法医犯罪现场调查(CSI)的自动识别与检索系统进行了研究。本文概述了对法医CS证据的调查。重点介绍了以计算机为中心的自动侦查系统。本文综述了以不同证据为中心的法医调查(FI)的最新研究,如面部、指纹、鞋印以及其他Foot-Wear (FW)印象,以机器学习(ML)算法为中心的FI,以机器学习(ML)算法为中心的FI,以机器学习为中心的模式识别,法医CSI中不同证据的特征,以及各种以匹配技术为中心的FI。最后,以准确性和其他两个指标为中心,比较了这些方法在CSI中的性能。在所有其他方法中,OLBP + LSSVM在准确率和召回率方面取得了更好的结果,其次是CLSTM。在准确性方面,CLSTM比任何其他方法产生更好的结果。
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引用次数: 0
Hybrid intelligent modeling approach for online predicting and simulating surface temperature of HVs 高压汽车表面温度在线预测与模拟的混合智能建模方法
Pub Date : 2022-03-18 DOI: 10.1142/s1793962322410070
Ming Tie, Hong Fang, Jianlin Wang, Weihua Chen
Online prediction as well as online simulation of surface temperature will play a significant role in flight safety of future near space hypersonic vehicles (HVs). But it still remains a classical scientific problem both in thermodynamics and aerospace science. In view of the complex HV structure and complex heat conduction procedure, three-dimensional numerical simulation is too inefficient for online prediction, while current rapid computation methods cannot meet the requirement of accuracy. Therefore, a hybrid intelligent dynamic modeling approach is proposed to estimate the surface temperature of HV with the combination of mechanism equations, test data and intelligent modeling technology. A simplified model based on a mechanism equation and experimental formulas is presented for predicting or simulating transient heat conduction procedure efficiently, while a case-based reasoning (CBR) algorithm is developed to estimate two uncertain coefficients in the simplified model. Furthermore, a support vector regression (SVR)-based model is developed to compensate the modeling error. With the data both from high-precision finite element computation and from real-world HV thermal protection experiments, a number of comparative simulations demonstrate the effectiveness of the proposed hybrid intelligent modeling approach.
地表温度的在线预测和在线模拟对未来近空高超声速飞行器的飞行安全具有重要意义。但它仍然是热力学和航空航天科学中的一个经典科学问题。由于高压结构复杂,热传导过程复杂,三维数值模拟对于在线预测效率太低,而现有的快速计算方法无法满足精度要求。为此,提出了一种结合机理方程、试验数据和智能建模技术的混合智能动态建模方法来估算高压电机表面温度。为了有效地预测或模拟瞬态热传导过程,提出了一种基于机理方程和实验公式的简化模型,并提出了一种基于实例的推理(CBR)算法来估计简化模型中的两个不确定系数。在此基础上,提出了一种基于支持向量回归(SVR)的模型来补偿建模误差。利用高精度有限元计算和实际高压热防护实验数据,进行了大量对比仿真,验证了混合智能建模方法的有效性。
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引用次数: 0
Data-driven modeling method with reverse process 数据驱动的逆向过程建模方法
Pub Date : 2022-03-17 DOI: 10.1142/s179396232341009x
Guo-dong Yi, Lifang Yi, Zaizhao Zhang, Chuihui Li
The factors that affect the performance of the equipment are numerous and complicated, which makes it difficult to establish a performance calculation model. This paper puts forward a data-driven modeling method with reverse process for this problem. Based on the partial least squares (PLS) algorithm and the gray relational analysis (GRA) method, the analysis method of the performance related factors, the extraction method of characteristic variables, and the performance modeling method are studied. The related factors of the energy consumption of an industrial steam turbine are analyzed, and an energy consumption calculation model is established, and the effectiveness of the above-mentioned modeling methods is verified with sample data, which provides a basis for the energy-saving optimization of the steam turbine.
影响设备性能的因素众多、复杂,给建立性能计算模型带来了困难。针对这一问题,本文提出了一种数据驱动的逆向建模方法。基于偏最小二乘(PLS)算法和灰色关联分析(GRA)方法,研究了性能相关因素的分析方法、特征变量的提取方法和性能建模方法。分析了某工业汽轮机能耗的相关因素,建立了能耗计算模型,并通过样本数据验证了上述建模方法的有效性,为汽轮机的节能优化提供了依据。
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引用次数: 0
On the modeling of asymmetric disturbance effect and rejection control for fixed-wing aircraft 固定翼飞机非对称扰动效应建模及抗扰控制研究
Pub Date : 2022-03-12 DOI: 10.1142/s1793962322500362
Rui Li, Kaiyu Qin
In this paper, the fixed-wing aircraft asymmetric disturbance effect modeling and closed-loop control system evaluation are considered. The asymmetric disturbance is accurately modeled by a combination of the consideration of inertial parameter variation and realistic aerodynamic characteristics of asymmetric configuration generated by the computational fluid dynamics (CFD) simulation. To analyze the impacts of the asymmetric disturbance on the aircraft, two flight control methodologies are compared. Besides the classic and widely implemented PID controller, an uncertainty and disturbance estimator (UDE)-based controller is additionally designed to deal with the asymmetric disturbance. Comparative simulation results are provided to show that: (1) the performance of PID control degrades significantly under asymmetric disturbances; and (2) the UDE-based controller is capable of dynamically compensating for the disturbance thus delivering better trajectory tracking performance than PID controller.
本文研究了固定翼飞机非对称扰动效应建模和闭环控制系统评估问题。通过计算流体动力学(CFD)仿真,结合考虑惯性参数变化和非对称构型的实际气动特性,对非对称扰动进行了精确建模。为了分析非对称扰动对飞行器的影响,比较了两种飞行控制方法。除了经典的PID控制器外,还设计了一种基于不确定性和干扰估计(UDE)的控制器来处理非对称干扰。对比仿真结果表明:(1)在非对称扰动下,PID控制性能明显下降;(2)基于ude的控制器能够动态补偿干扰,从而提供比PID控制器更好的轨迹跟踪性能。
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引用次数: 0
Prediction of students' employability using clustering algorithm: A hybrid approach 用聚类算法预测学生就业能力:一种混合方法
Pub Date : 2022-03-12 DOI: 10.1142/s1793962322500490
N. Premalatha, S. Sujatha
Data Mining is a process of exploring the huge data in search of reliable patterns and methodical relationship among variables. As a result, the findings may be validated through applying the detected patterns to a novel subset of the data. In simple words, Data Mining is referred as extracting the useful information as large dataset and transforming into reliable structure for future use. Data Mining has shown its incredible performance in various fields to a greater extent, out of which, Educational Data Mining (EDM) is one among them. Many researchers have addressed huge number of problems in EDM and applied various techniques to reveal the useful and hidden information that helped in the process of decision making. Students getting employed during and after graduation are one of the important parts of their life. Students, based on their academic performances, are getting employed in companies they deserve. But still, the probability of getting employed is very less in this competitive world. In this paper, a real-time scenario has been chosen for analyzing various factors for getting employed/unemployed. Various clustering and classification techniques have been implemented and their performances are studied. A hybrid approach is presented in this paper that integrates the benefits of particle swarm optimization (PSO) and fuzzy clustering means (FCMs). The results obtained show that the proposed technique helps in obtaining higher accuracy to other clustering techniques. The proposed clustering algorithm PSO-FCM, accuracy is 34.4%, 36.45% and 28.45% higher than the existing method, time complexity shows 45%, 33% and 49% lower than the existing [Formula: see text]-means clustering, Naïve Bayes clustering and SVM clustering algorithms, respectively.
数据挖掘是在海量数据中寻找可靠的模式和变量之间的系统关系的过程。因此,可以通过将检测到的模式应用于新的数据子集来验证发现。简单地说,数据挖掘就是将有用的信息作为大数据集提取出来,并将其转化为可靠的结构以供将来使用。数据挖掘已经在各个领域更大程度上显示出其不可思议的表现,教育数据挖掘(EDM)就是其中之一。许多研究人员已经解决了电火花加工中的大量问题,并应用各种技术来揭示有助于决策过程的有用和隐藏信息。学生在毕业期间和毕业后就业是他们生活的重要组成部分之一。根据他们的学习成绩,学生们正在得到他们应得的公司的工作。但是,在这个竞争激烈的世界里,找到工作的可能性仍然很小。在本文中,选择了一个实时场景来分析就业/失业的各种因素。实现了各种聚类和分类技术,并对其性能进行了研究。本文提出了一种结合粒子群算法和模糊聚类算法优点的混合算法。结果表明,与其他聚类技术相比,该方法具有更高的聚类精度。本文提出的聚类算法PSO-FCM,准确率比现有方法分别提高34.4%、36.45%和28.45%,时间复杂度比现有[公式:见文]-均值聚类、Naïve贝叶斯聚类和SVM聚类算法分别降低45%、33%和49%。
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引用次数: 1
GenMuNN: A mutation-based approach to repair deep neural network models 基于突变的修复深度神经网络模型的方法
Pub Date : 2022-03-12 DOI: 10.1142/s1793962323410088
Huanhuan Wu, Zheng Li, Zhanqi Cui, Jianbin Liu
Deep neural network (DNN) models have been widely used in e-commerce, games, automobiles, manufacturing, and so on. Improper structure, parameters, activation function, or incorrect loss function of the DNN models may cause defects in performance or security. As a result, there are some researches that focus on repairing DNN such as MODE and Apricot. However, the cost of repairing is high or the repair may lead to overfitting. In order to solve this problem, we propose GenMuNN, which is a Mutation-Based Approach to Repair Deep Neural Network Models. First, it analyzes the importance of the weights of the neurons in each layer of the DNN model to the correctness of the final prediction results, and ranks the weights according to the influence on the prediction results of the DNN model. Second, mutation is performed to generate mutants based on the rank of weights, and genetic algorithms are used to select mutants for the next round of mutation until the stop condition is touched. Experiments are carried on a set of DNN models which are trained with the MNIST dataset. The experimental results show that GenMuNN can improve the accuracy of the DNN models.
深度神经网络(DNN)模型已广泛应用于电子商务、游戏、汽车、制造业等领域。如果DNN模型的结构、参数、激活函数或损失函数不正确,可能会导致性能或安全性上的缺陷。因此,有一些研究侧重于修复DNN,如MODE和Apricot。然而,修复的成本很高,或者修复可能导致过拟合。为了解决这个问题,我们提出了一种基于突变的修复深度神经网络模型的方法GenMuNN。首先分析DNN模型各层神经元的权值对最终预测结果正确性的重要性,并根据对DNN模型预测结果的影响程度对权值进行排序。其次,根据权值的秩进行突变,生成突变体,并使用遗传算法选择突变体进行下一轮突变,直到达到停止条件。用MNIST数据集训练了一组深度神经网络模型,并进行了实验。实验结果表明,GenMuNN可以提高深度神经网络模型的精度。
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引用次数: 2
Multi-objective rescue path optimization for passenger ship accident under tilt 客船倾斜事故多目标救援路径优化
Pub Date : 2022-03-12 DOI: 10.1142/s1793962322500520
Tengbin Zhu, Hao Zhang, Yingjie Xiao
In order to research the rescue path problem in the accident of passenger ships under tilt, this paper establishes a multi-objective rescue path optimization model under tilt effect. By analyzing the fuzzy time and fuzzy risk, the objective functions of this model are optimal satisfaction function and optimal risk function. Related constraints are also described mathematically. The PSO-GA (particle swarm and genetic) hybrid algorithm is used to solve the model when designing the algorithm. Two-level planning is incorporated in the algorithm, the best solution in the lower-level planning is assigned to the upper-level, and the upper-level plan feeds back the result to the lower level, and finally the global optimal Pareto solution is obtained. Decision makers can choose appropriate solutions based on their preference. The simulation experiment compares the multi-objective rescue path optimization model with the traditional time-optimal model. Among the three optimal solution sets, solution 1 decreases by 3.36% in risk and the satisfaction rate increases by 69.44%. Solution 2 rose by 13.96% in risk, but the satisfaction increased by 87.93%, and the risk of solution 3 decreased by 11.41%, while the satisfaction increased by 52.41%. The results show that the established model is reasonable and the algorithm is feasible.
为了研究客船倾斜事故中的救援路径问题,建立了倾斜影响下的多目标救援路径优化模型。通过对模糊时间和模糊风险的分析,该模型的目标函数为最优满意度函数和最优风险函数。相关约束也用数学方法描述。在设计算法时,采用粒子群遗传算法(PSO-GA)对模型进行求解。算法中引入两级规划,将下层规划中的最优解分配给上层规划,上层规划将结果反馈给下层规划,最终得到全局最优Pareto解。决策者可以根据自己的偏好选择合适的解决方案。仿真实验将多目标救援路径优化模型与传统的时间优化模型进行了比较。在三个最优解集中,方案1的风险降低了3.36%,满意度提高了69.44%。方案2的风险提高了13.96%,满意度提高了87.93%;方案3的风险降低了11.41%,满意度提高了52.41%。结果表明,所建立的模型是合理的,算法是可行的。
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引用次数: 2
Simulation-oriented model reuse in cyber-physical systems: A method based on constrained directed graph 面向仿真的网络物理系统模型复用:一种基于约束有向图的方法
Pub Date : 2022-03-08 DOI: 10.1142/s1793962322410057
Wenzheng Liu, Heming Zhang, Chao Tang, Shuangfei Wu, Hongguang Zhu
Modeling and Simulation of Cyber-Physical Systems (MSCPS) is demanding in terms of immediate response to dynamic and complex changes of CPS. Simulation-oriented model reuse can be used to build a whole CPS model by reusing developed models in a new simulation application, which avoid repeated modeling and thus reduce the redevelopment of submodels. Model composition, one of the important methods, enables model reuse by selecting and adopting diversified integration solutions of simulation components to meet the requirements of simulation application systems. In this paper, a real-time model integration approach for global CPS modeling is proposed, which reuses developed submodels by compositing submodel nodes. Specifically, a constrained directed graph of submodels for the whole system which can meet the simulation requirements is constructed by reverse matching. Submodel properties, including co-simulation distance between submodel nodes, reuse benefit and simulation performance of model nodes, are quantified. Based on the properties, the model-integrated solution for the whole CPS simulation is retrieved throughout the model constrained digraph by the Genetic Algorithm (GA). In the experiment, the proposed method is applied to a typical model integrated computing scenario containing multiple model-integration solutions, among which the Pareto optimal solutions are retrieved. Results show that the effectiveness of the model integration method proposed in this paper is verified.
信息物理系统建模与仿真对信息物理系统动态复杂变化的即时响应提出了更高的要求。面向仿真的模型重用可以通过在新的仿真应用中重用已开发的模型来构建完整的CPS模型,避免了重复建模,从而减少了子模型的再开发。模型组合是一种重要的方法,通过选择和采用多样化的仿真组件集成方案来实现模型复用,以满足仿真应用系统的需求。本文提出了一种面向全局CPS建模的实时模型集成方法,该方法通过组合子模型节点重用已开发的子模型。具体而言,通过反向匹配,构建了整个系统满足仿真要求的约束子模型有向图。量化子模型属性,包括子模型节点间的协同仿真距离、模型节点的复用效益和仿真性能。基于这些特性,利用遗传算法在整个模型约束有向图中检索整个CPS仿真的模型集成解。在实验中,将该方法应用于包含多个模型集成解的典型模型集成计算场景,并从中检索出Pareto最优解。结果表明,本文提出的模型集成方法的有效性得到了验证。
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引用次数: 1
Regional importance detection of 3D mesh via fusion of local color difference and curvature entropy 基于局部色差和曲率熵融合的三维网格区域重要性检测
Pub Date : 2022-03-07 DOI: 10.1142/s179396232250060x
Xiaodong Wang, Fengju Kang, Hao Gu, Hongtao Liang
{"title":"Regional importance detection of 3D mesh via fusion of local color difference and curvature entropy","authors":"Xiaodong Wang, Fengju Kang, Hao Gu, Hongtao Liang","doi":"10.1142/s179396232250060x","DOIUrl":"https://doi.org/10.1142/s179396232250060x","url":null,"abstract":"","PeriodicalId":13657,"journal":{"name":"Int. J. Model. Simul. Sci. Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74978957","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
Coyote-Wolf optimization-based deep neural network for cancer classification using gene expression profiles 基于基因表达谱的基于狼-狼优化的深度神经网络癌症分类
Pub Date : 2022-03-07 DOI: 10.1142/s1793962322500581
M. K. Deshmukh, Vinod Vaze, A. Gaikwad
{"title":"Coyote-Wolf optimization-based deep neural network for cancer classification using gene expression profiles","authors":"M. K. Deshmukh, Vinod Vaze, A. Gaikwad","doi":"10.1142/s1793962322500581","DOIUrl":"https://doi.org/10.1142/s1793962322500581","url":null,"abstract":"","PeriodicalId":13657,"journal":{"name":"Int. J. Model. Simul. Sci. Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75584097","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
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Int. J. Model. Simul. Sci. Comput.
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