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Operations Research, Systems Engineering and Industrial Engineering Commons™
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Articles 2311 - 2340 of 3880
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Simulation Of Staring Imaging Attitude Tracking Finite Time Control Of Tv Satellite, Yushu Feng, Kun Liu, Wendun Zhang
Simulation Of Staring Imaging Attitude Tracking Finite Time Control Of Tv Satellite, Yushu Feng, Kun Liu, Wendun Zhang
Journal of System Simulation
Abstract: For the attitude tracking control problem of TV satellite staring imaging, a attitude tracking finite time control method driven by Double-Gimbaled Control Moment Gyroscopes (DGCMG) and reaction flywheels was proposed. The expected attitude angles and attitude angular velocity of satellite was computed when it stared imaging. A TV satellite attitude tracking model was described with quaternion. A finite time controller based on homogeneous method of nonlinear system was proposed. The numerical simulation and hardware-in-loop simulation results show that the method can achieve the attitude tracking control of staring imaging of TV satellite, guarantee the closed-loop system converge to the …
Multiple Disasters Evacuation Perceptual Model Based On Agent Technology, Xuefeng Zhang, Chengjun Zhang, Chenxi Bai, Taiping Jiang, Yuezhong Chu
Multiple Disasters Evacuation Perceptual Model Based On Agent Technology, Xuefeng Zhang, Chengjun Zhang, Chenxi Bai, Taiping Jiang, Yuezhong Chu
Journal of System Simulation
Abstract: Various disasters or accidents often reoccur in the process of evacuation. In order to solve the problem of evacuation in multiple disasters, a perceptual model for evacuation was proposed based on multi-agent technology. By guiding the decision and action of people with mathematical model of disaster and individual perception model, the crowd evacuation stimulation was combined with environment disaster model. It stimulated the perceptive functions such as visual sense, sense of smell, and auditory sense with ray method, gas molecular diffusion formula, and the theory of sound transmission. It analyzed the information of people through stress reaction model and …
Multivariate Time Series Local Support Vector Regression Forecast Methods For Daily Temperature, Dingcheng Wang, Zhili Cao, Beijing Chen, Yujia Ni
Multivariate Time Series Local Support Vector Regression Forecast Methods For Daily Temperature, Dingcheng Wang, Zhili Cao, Beijing Chen, Yujia Ni
Journal of System Simulation
Abstract: Daily temperature forecast is an important part in weather forecasting. New methods are explored to improve the prediction accuracy since the atmosphere system is a complex nonlinear system. A model based on multivariate time series and local support vector regression was proposed. After constructing multivariate time-series with C-C method and minimum prediction error method, a way to extract the nearest neighbor from each predictor's sequences was used to build the 1-day ahead local forecasting model for daily maximum and minimum temperature. To demonstrate the effectiveness, the model was applied and tested in data from 753 stations data package of …
Orthogonal Experimental Optimization Design For Improving Aerodynamic Characteristics Of Hovering Air Vehicle, Yanan Yu
Journal of System Simulation
Abstract: Vertical hovering MAV model with flexible aerodynamic shape was proposed. The passive adaptive deformation that produced on the aerodynamic shape was designed to absorb disturbance from outside airflow pressure, and furthermore to improve aircraft's disturbance resistance ability. Multiple factors' effects for aircraft's aerodynamic characteristics were analyzed, such as structural geometrical parameters, candidate material properties, and environmental parameters. The orthogonal experimental analysis of aircraft aerodynamic forces was accomplished, which include the forces produced in the horizontal and vertical direction. The significant factors effecting on the flight performance were discussed and the best response value in the selected parameter range was …
Dynamic Stochastic Relay Selection Algorithm In Peer-To-Peer Networks, Chengwei Zhang, Wenqing Cheng, Hei Xiaojun
Dynamic Stochastic Relay Selection Algorithm In Peer-To-Peer Networks, Chengwei Zhang, Wenqing Cheng, Hei Xiaojun
Journal of System Simulation
Abstract: A stochastic routing algorithm for selecting appropriate relay nodes in peer-to-peer networks was proposed. This algorithm was constructed using a stochastic programming framework by leveraging the actual delay of local links and the statistical delay distributions of non-local overlay links. In order to approximate the statistical delay distribution of non-local overlay links, the historical delay values of each link were utilized to approximate the link delay distribution. This algorithm was fully distributed and the stochastic link measurement data could be updated between neighboring nodes at a longer time granularity to reduce routing overhead. This algorithm and …
Research On Development And Integration Method Of Bmds Integrated Test And Training Environment, Guoqiang Zhang, Xiaohe Liu, Fangting Jiang, Zhiping Li
Research On Development And Integration Method Of Bmds Integrated Test And Training Environment, Guoqiang Zhang, Xiaohe Liu, Fangting Jiang, Zhiping Li
Journal of System Simulation
Abstract: Building the BMDS integrated test and training environment is an effective means to quickly generate the combat effectiveness of BMDS. Aiming at the current situation that there was no unified development and integration method of the BMDS integrated test and training environment, based on systematic analysis to the capability requirements of the method, the development and integration method of pure digital simulation based on Integrated Non-Real-time Simulation Environment (INRS) and LVC simulation based on Integrated Real-time Simulation Environment (IRSE ) was put forward, and the technologies of adaptor was focused on. The integrated development and integration not only of …
Research Of Merging Three-Dimensional Static Scene And Moving Objects Based On Video, Kunjin He, Wang Lin, Jianxin Liu, Zhengming Chen, Xiaozhong Chen
Research Of Merging Three-Dimensional Static Scene And Moving Objects Based On Video, Kunjin He, Wang Lin, Jianxin Liu, Zhengming Chen, Xiaozhong Chen
Journal of System Simulation
Abstract: Against the difficulty in three-dimensional real-time rendering of scene that contains moving objects, a video-based method in building and merging three-dimensional static scene and moving objects was proposed. According to the classification of moving objects, a three-dimensional static scene was established and a parameterized model base was produced. Based on the video, moving objects were detected and features (including basic features and dynamic features) were extracted. Based on basic features, corresponding type model in the parameterized model base was instantiated. Based on the dynamic features, the three-dimensional static scene and moving object models were merged and the …
Effectiveness Equivalent And Multi-Effectiveness Equivalent Of Weapon System, Zhongren Ni, Zhiqiang Zhao, Yueping Wang
Effectiveness Equivalent And Multi-Effectiveness Equivalent Of Weapon System, Zhongren Ni, Zhiqiang Zhao, Yueping Wang
Journal of System Simulation
Abstract: Equivalent analysis based on weapon effectiveness, which was conducted during 1960s-1970s by American scholars, provided scientific method for equivalent analysis of weapon system. But this principle can only be used under the given conditions, which was pointed out by American scholars. That how to judge solution existence of effectiveness equivalent model under given conditions and remove limit is always a difficult question of perplexing weapon system analysis. By the use of special matrix theory and set decomposition principle, weapon coordination model of weapon system of systems combat was established, down-triangle matrix standard model of efficacy matrix was obtained, the …
Research On Sparse Grid Non-Uniformity Correction Technologies For Infrared Imaging Resistor Array, Huijie Du, Hongming Zhao, Yu Hong, Gao Yang, Zhang Yi
Research On Sparse Grid Non-Uniformity Correction Technologies For Infrared Imaging Resistor Array, Huijie Du, Hongming Zhao, Yu Hong, Gao Yang, Zhang Yi
Journal of System Simulation
Abstract: The non-uniformity characteristic is the crucial factors affecting the image quality projected by infrared imaging resistor array, and which affects the fidelity of the infrared scene simulation. The non-uniformity characters of the infrared imaging simulation resistor array were analyzed based on measured data; the sparse grid and the flood non-uniformity correction technologies were investigated and analyzed and based on the existing measuring technology the improved sparse grid method for engineering was proposed. Through measuring the non-uniformity data, establishing the linear look-up table and correcting the non-uniformity image, the non-uniformity correction algorithm was developed and validated. The result shows …
Soa-Based Network-Centric Software Architecture For Warfare Simulation Applications, Wendi Cheng, Chu Wei
Soa-Based Network-Centric Software Architecture For Warfare Simulation Applications, Wendi Cheng, Chu Wei
Journal of System Simulation
Abstract: For the difficulty of integrating heterogeneous resource and low reuse rate by task-oriented development model in the traditional electronic information system, this article proposes a service-oriented simulation software constructing method. By information registration, publication, subscription, distribution and other network-centric core services to build a global service bus for dynamic scheduling, we can improve information sharing capabilities. By the standard descriptions and specifications, we can make flexible reorganization of business services. In a loosely coupled way to integrate the system between the service provider and service requester, we can format a service-oriented system development platform, which can provide support …
Overall-Wind-Speed Dynamic Sliding Mode Power Control For Direct-Driven Pmsg-Based Wind Energy Generation System, Aihua Wu, Buhui Zhao, Jingfeng Mao
Overall-Wind-Speed Dynamic Sliding Mode Power Control For Direct-Driven Pmsg-Based Wind Energy Generation System, Aihua Wu, Buhui Zhao, Jingfeng Mao
Journal of System Simulation
Abstract: A novel dynamic sliding mode control (DSMC) strategy for direct-driven PMSG system was proposed to improve wind energy generation efficiency in overall-wind-speed operating condition. Based on the multi-stage working characteristics, optimum torque control method was adopted to implement the MPPT task when wind speed was under the rating value, and power control method was adopted to implement the constant power generation task when wind speed was above the rating value. The controller was designed by the sliding mode reaching law method of power exponent function. Due to the switch function amplitude feedback, the switch gain was granted the …
Compensation For Auv’S Navigation Algorithm Based On Virtual Noise Model, Menglong Cao, Feifei Li, Xintao Liu
Compensation For Auv’S Navigation Algorithm Based On Virtual Noise Model, Menglong Cao, Feifei Li, Xintao Liu
Journal of System Simulation
Abstract: The simultaneous localization and mapping (SLAM) of Autonomous underwater robot (AUV) is the key technology to realize the auto navigation for robot in the unknown environment of underwater, and it is one of the hot topics in the field of robotics research. In the framework of autonomous underwater robot SLAM, extended kalman filter (EKF) was applied to achieve the SLAM. For the model linearization errors and unknown noise statistics, EKF algorithm was used based on virtual noise compensation technology. This method could make the unknown model error into the virtual noise, and use the noise statistical to estimate the …
Research On Magnetic Device Model Of Nonlinear Inductance Combined With Transformer And Inductor, Hongzhu Li, Jiayue Sun, Qingjie Qi, Wang Qiao
Research On Magnetic Device Model Of Nonlinear Inductance Combined With Transformer And Inductor, Hongzhu Li, Jiayue Sun, Qingjie Qi, Wang Qiao
Journal of System Simulation
Abstract: A modeling method of magnetic device combining transformer and inductance was put forward. The modeling method reflects characteristics of magnetic and electric circuit simultaneously, and reflects parasitic parameters with capacitance. And the physical concepts of parameters are clear in the model. The interface model reflecting magnetic and electric circuit was established through ideal transformer based on electromagnetic theory, and nonlinear inductance simulation model reflecting hysteresis effect through derivation was obtained. The hysteresis loop of inductance actual simulation and that from magnetic core manual agreed well, proving the correctness and effectiveness. By modeling method in the proposed magnetic device, coupling …
Performance Evaluation Of Bayesian Estimator With Consistency Validation, Zuolei Sun, Li Ying, Zhang Bo, Zhang Wen
Performance Evaluation Of Bayesian Estimator With Consistency Validation, Zuolei Sun, Li Ying, Zhang Bo, Zhang Wen
Journal of System Simulation
Abstract: Considering the lack of sound evaluation method for Bayesian estimator design, an approach employing consistency as the core criterion was proposed. By studying the unbiasedness and whiteness of innovation sequence yielded during observation update routine, the normalized innovations square (NIS) was constructed, and then the chi-square test being able to detect the Posterior's consistency was carried out on NIS. Experiments demonstrate that the proposed algorithm can identify the inappropriate parameter configuration for both linear and nonlinear systems, therefore the performance of the estimators can be evaluated.
Research On Credibility Of Function Validation To C2 System Of Land Force, Yaxin Tan, Yongchun Xia, Fan Rui, Haitao Zhi
Research On Credibility Of Function Validation To C2 System Of Land Force, Yaxin Tan, Yongchun Xia, Fan Rui, Haitao Zhi
Journal of System Simulation
Abstract: The function verification of C2 system of land force is a way to check its satisfaction level to real fighting in the system application. The verification is caught out after the force has received these equipment. In order to complete the verification, the environment with virtual force and real software was built by modeling and simulation method, so that the verification could be carried out under the condition which is similar to true combat. In this environment, the interaction between real human and virtual force by the C2 software could help to complete the verification. Focusing on the credibility …
Optimization Scheme Of Average Time For Finding Idle Channel In Cognitive Radio System, Qiao Pei, Liyuan Xiao, Yanyan Han, Gao Ling
Optimization Scheme Of Average Time For Finding Idle Channel In Cognitive Radio System, Qiao Pei, Liyuan Xiao, Yanyan Han, Gao Ling
Journal of System Simulation
Abstract: In cognitive radio system, periodic spectrum sensing was taken by secondary users to prevent the interference to primary users. Supposed that there are many primary user channels, when the current primary user occupies channel, secondary users do spectrum handover. During spectrum handover, the time of finding an idle channel is a random variable. In order to speed up spectrum handover, the system used equal gain combining cooperative spectrum sensing to inspect an idle channel. This pattern optimized the sensing time of the single user channel, in order to get the best effect of the average time in finding idle …
Mechanism For Green Multicast Routing Protection In Multi-Granularity Transport Networks, Junling Shi, Xingwei Wang, Huang Min
Mechanism For Green Multicast Routing Protection In Multi-Granularity Transport Networks, Junling Shi, Xingwei Wang, Huang Min
Journal of System Simulation
Abstract: A mechanism for green multicast routing protection was designed, where the constraint of quality of service (QoS), energy consumption and the survivability to single link or node failure were under consideration. The node model which supported the exchange of multi-granularity services was built to meet the energy saving requirement in multi-granularity services, and the analysis of energy consumption was introduced with the formulas of energy consumption defined. Based on the physical topology, a multi-layer auxiliary graph was proposed, which was used to allocate and release resources. The fuzzy mathematics method was used to present QoS by the membership degree. …
Evolutionary Game-Based Spectrum Sharing Scheme In Cognitive Radio Network, Huanhuan He, Xingwei Wang, Huang Min
Evolutionary Game-Based Spectrum Sharing Scheme In Cognitive Radio Network, Huanhuan He, Xingwei Wang, Huang Min
Journal of System Simulation
Abstract: In order to solve the waste of resources caused by the static spectrum allocation policy, cognitive radio technology can be used to dynamically and efficiently manage spectrum, and spectrum sharing becomes the key issue. To make secondary users to share spectrum fairly, an evolutionary game-based spectrum sharing scheme in cognitive radio network was proposed. Because cognitive radio network was dynamic and heterogeneous, the wireless channel was unreliable and affected by environment easily, the knowledge of fuzzy mathematics was introduced to characterize the parameters related to the secondary user satisfaction degree, and the Gas Brownian Motion Optimization algorithm was …
Study Of Model And Simulation On Ceramic Tile Polishing Energy Consumption, Haidong Yang, Chengdun Guo, Li Hong, Guosheng Liu, Jiawen Wu
Study Of Model And Simulation On Ceramic Tile Polishing Energy Consumption, Haidong Yang, Chengdun Guo, Li Hong, Guosheng Liu, Jiawen Wu
Journal of System Simulation
Abstract: Currently, there are many defects in the production line of ceramic polishing, such as over polishing and high energy consumption, so it is an urgent mission to optimize the technical processes in order to cut down the energy consumption. Material removal equations and energy usage model were established based on the kinematic mechanism process and Preston equation. Simulation experiments were done by the above equations and model, so as to depict the evolution in both quality and power consumption. The impact of transmission speed of belt, lateral swing speed, disc rotation speed and other kinematic parameters on over polishing …
Research On Modeling And Scheduling Of Cluster Tools With Reentrant Process, Chunrong Pan, Li Liang
Research On Modeling And Scheduling Of Cluster Tools With Reentrant Process, Chunrong Pan, Li Liang
Journal of System Simulation
Abstract: Cluster tools reconfigured are increasingly adopted in wafer fabrication. With single-wafer processing technology, the productivity and quality of semiconductor manufacturing have been improved. The configurations of cluster tools and constraints of operation processes were proposed. Due to the increase of processing requirements of wafer revisiting, the scheduling of cluster tools becomes more complicated. Thus, modeling, performance analyzing and scheduling of cluster tools with reentrant process were reviewed. Meanwhile, an illustrative example was given to show the feasibility of simulation scheduling. By analyzing the advantages and disadvantages of research methods available, approaches and future directions which would be effective for …
Robust Model And Optimization Of Anti-Impact Performance For Mems Ring Gyroscope, Jiang Tao, Sun Lin
Robust Model And Optimization Of Anti-Impact Performance For Mems Ring Gyroscope, Jiang Tao, Sun Lin
Journal of System Simulation
Abstract: In order to reduce the influence of parameter variation on anti-impact performance of micro mechanical gyroscope, a kind of MEMS ring gyroscopes was chosen as the research object, applying the method of explicit dynamic finite element analysis and design of experiment, influence of parameter variation was studied with significant analysis, and reasonable design parameters were decided. Mathematical model of anti-impact robustness optimization for ring gyroscope was established, in which maximum impact stress and performance variation were minimized as the optimal goal. Ultimately, the optimal solution set could be obtained by means of pareto multi-objective genetic algorithm. Simulation results show …
Gep Automatic Clustering Algorithm With Dynamic Penalty Factors, Chen Yan, Kangshun Li, Yang Lei
Gep Automatic Clustering Algorithm With Dynamic Penalty Factors, Chen Yan, Kangshun Li, Yang Lei
Journal of System Simulation
Abstract: Various problems such as sensitive selection of initial clustering center, easily falling into local optimal solution, and determining numbers of clusters, still exist in the traditional clustering algorithm. A GEP automatic clustering algorithm with dynamic penalty factors was proposed. This algorithm combines penalty factors and GEP clustering algorithm, and doesn't rely on any priori knowledge of the data set. And a dynamic algorithm was proposed to generate the penalty factors according to the distribution characteristics of different data sets, which is a better solution for the impact of isolated points and noise points. According to four dataset, penalty factors' …
Algorithms For Join Queries In Multiple Wireless Sensor Networks, Shangfeng Mo, Yongjian Fan, Xiaoliang Wang, Qingchun Yu, Yinglong Li
Algorithms For Join Queries In Multiple Wireless Sensor Networks, Shangfeng Mo, Yongjian Fan, Xiaoliang Wang, Qingchun Yu, Yinglong Li
Journal of System Simulation
Abstract: The perception layer of Internet of Things (IoTs) is mainly composed of Multiple Wireless Sensor Networks (MWSNs). Data query processing is a very important research area in MWSNs. Join queries can monitor similar network environments in different positions. In general join algorithm, each ordinary node sends its join attribute value to the database server. The database server finds out the result set which meets the join conditions. In distributed join algorithm, the ordinary nodes predict their filters of next round and the database server obtains the global, common filters. The nodes which meet the join conditions send their data …
Generate Network’S Disjoint Mps Based On Simevents Simulation, Tang Jian, Fuli Ai, Faming Shao, Jiaojiao Zhang
Generate Network’S Disjoint Mps Based On Simevents Simulation, Tang Jian, Fuli Ai, Faming Shao, Jiaojiao Zhang
Journal of System Simulation
Abstract: The disjoint MPs (Minimal Path sets) algorithm proposed was improved from the point of signal transmission. The CoA network was transformed into a corresponding signal network, which was composed of forward and backward transmitting paths. According to the basic principle of disjoint MPs algorithm, a set of signal transmitting and rewriting rules, including forward and backward processing rules, were designed to make the disjoint MPs could be generated by means of DES (Discrete Event Simulation). The basic realizing idea was studied in SimEvents, in which, the entities acted as the information carriers, and the nodes as the …
Novel Algorithm Of High-Speed Target Isar Imaging Based On Stretch Method, Wenmao Luo, Yingliu Cui
Novel Algorithm Of High-Speed Target Isar Imaging Based On Stretch Method, Wenmao Luo, Yingliu Cui
Journal of System Simulation
Abstract: The pulse compression result will be distorted while the target moves very fast and it cannot get right ISAR images. A novel algorithm based on chirp-Fourier transform was proposed to solve this problem. In the scheme, every echo’s differential frequency signal of stretch processing was calculated by chirp-Fourier transform to estimate the target’s location and speed, and the target’s precious speed could be averaged by the estimations during the whole dwell time. Then the penalty function could be constructed to eliminate the intra and inter-pulse motion, and it could get right ISAR images. Because the chirp-Fourier transform was …
Design And Realization Of Radar Warning Receiver Modeling System, Limin Liu, Cheng Cheng, Zhuangzhi Han
Design And Realization Of Radar Warning Receiver Modeling System, Limin Liu, Cheng Cheng, Zhuangzhi Han
Journal of System Simulation
Abstract: According to the structure of the mainstream modern airborne radar warning receiver, a modeling method of radar warning receiver simulation system was proposed, and it realized by SystemVue. The system consists of radar signal interception, parameter estimation and signal sorting, and pulse description words can be obtained at last. The application of sorting method based on detection of single source point in the system improves the robustness. Simulation results verify the scheme feasibility.
Robust Flexible Job Shop Scheduling Method With Machine Breakdowns, Guohui Zhang, Lihui Wu, Nie Li, Yongcheng Wang
Robust Flexible Job Shop Scheduling Method With Machine Breakdowns, Guohui Zhang, Lihui Wu, Nie Li, Yongcheng Wang
Journal of System Simulation
Abstract: There are many uncertain events in the actual production process of flexible job shop, which affect the normal production and scheduling to achieve objective. According to the factor of the machine breakdown, two robustness measures combined with flexible job shop scheduling characteristics were proposed. One is considered as the initial schedule and the actual schedule makespan deviation, the other one is considered as each machine idle time and work load. The genetic algorithm was used to solve the problem, and the two parts chromosome coding was designed to avoid generating the illegal solution. Through the establishment of the probability …
Single Sign-On Model Based On Trusted-Daa Connection, Xiaohui Yang, Lijun Jiang, Wang Hong, Siyuan Chang
Single Sign-On Model Based On Trusted-Daa Connection, Xiaohui Yang, Lijun Jiang, Wang Hong, Siyuan Chang
Journal of System Simulation
Abstract: Traditional single sign-on (SSO) models adopt SSL connections in the cloud computing environments, while there exist several problems such as certificates cannot be updated in time, certificate updating needs a third party CA, etc.. To solve above problems, TPM was introduced between cloud identity providers and cloud service providers, and a trusted DAA connection (T-D-SSL) was designed by adopting the DAA authentication method to implementation cross platform trusted authentication, secure channel establishment, and certificate updating operation. Combining with T-D-SSL, SAML2.0, and ID-FF1.2, a new SSO model of the cloud computing environments was proposed, which could make sure the system …
Simulation Research On Model Parameter Identification Based On Prediction Error, Hongquan Wu, He Chi, Zhang Ping, Shuen Wang, Hongqiang Wei, Chu Jin, Zhang Peng
Simulation Research On Model Parameter Identification Based On Prediction Error, Hongquan Wu, He Chi, Zhang Ping, Shuen Wang, Hongqiang Wei, Chu Jin, Zhang Peng
Journal of System Simulation
Abstract: Parametric differential method is often used to extract resistance coefficient in the process of trajectory simulation research for aerial bomb. The method exists following problems: high precise original data required and influenced by measurement error easily, which would cause serious error in identification result and even lead to the radiation during identification. In order to solve these problems, a method of extracting resistance coefficient based on prediction error was modeled. While coordinate was used as observations, simulation research of model parameter identification was carried out for some bomb. Precision of calculation for two models was calculated and analyzed …
Power Modeling And Simulation For D/A Network In R-C Hybrid Sar Adc, Xingyuan Tong, Zhang Yang
Power Modeling And Simulation For D/A Network In R-C Hybrid Sar Adc, Xingyuan Tong, Zhang Yang
Journal of System Simulation
Abstract: D/A conversion network of SAR (SAR: Successive Approximation Register) ADC was discussed. The energy model of the capacitor array in R-C hybrid D/A network was established by using MATLAB. With the combination of resistor string’s static power and capacitor array’s switching power, the power model of the R-C hybrid network in SAR ADC was proposed based on a 65nm CMOS process. Furthermore, by considering matching requirement for the passive components, 12-bit R-C hybrid D/A networks with “5+7”, “6+6” and “7+5” type of structures were simulated and compared. The research can provide significant guidance for circuit design and optimization of …