Open Access. Powered by Scholars. Published by Universities.®

Operations Research, Systems Engineering and Industrial Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

2020

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 1051 - 1080 of 1941

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Extraction Of Chitosan From Died Honey Bee Apis Mellifera, Gulnora Akmalovna Ixtiyarova, Dilshoda Azamovna Hazratova, Bobur Nosir O’G’Li Umarov, Oksana Muratbayevna Seytnazarova Jun 2020

Extraction Of Chitosan From Died Honey Bee Apis Mellifera, Gulnora Akmalovna Ixtiyarova, Dilshoda Azamovna Hazratova, Bobur Nosir O’G’Li Umarov, Oksana Muratbayevna Seytnazarova

Chemical Technology, Control and Management

This article presents the results of obtaining biopolymers of chitin and chitosan from a new promising source- died honey bee apis mellifera. To obtain chitin, at the first stage, the protein (deproteination) and mineral (demineralization) constituents of subpestilence, i.e. put them in soluble state and removed. Demineralization was carried out with 2 M hudrochloric acid for 5 hours at room temperature. The process of deproteination is carried out by processing the crushed raw materials with 1 N sodium hudroxide solution for 1 hour at a temperature of 800С. Each process was accompanied by washing the raw materials to …

Go to article

Mathematical Modeling Of Thermal Processes Of Traction Asynchronous Engines For Diagnosis And Control Of Their Technical Condition, Nilufar Rabbanaqulovna Avezova, Javharbek Sulton Ugli Fayzullayev Jun 2020

Mathematical Modeling Of Thermal Processes Of Traction Asynchronous Engines For Diagnosis And Control Of Their Technical Condition, Nilufar Rabbanaqulovna Avezova, Javharbek Sulton Ugli Fayzullayev

Chemical Technology, Control and Management

Mathematical models of thermal processes of traction asynchronous motors are developed. A traction asynchronous motor is considered as a thermal system consisting of three bodies (stator winding, stator magnetic core and rotor), which take into account the heat exchange not only between the corresponding bodies, but also the heat exchange between each body and the environment. It is shown that the steady excess of the stator winding temperature of a traction asynchronous motor depends on the multiplicity of the stator winding current, the coefficient of electrical energy loss, and also on the temperature coefficient of the resistance of the winding …

Go to article

Thermal Conductivity Performance Of 2d Hbn/Mos 2/Hybrid Nanostructures Used On Natural And Synthetic Esters, Jaime Taha-Tijerina, Hélio Ribeiro, Karla Aviña, Juan Manuel Martínez, Anna Paula Godoy, Josué Marciano De Oliveira Cremonezzi, Milene Adriane Luciano, Marcos Antônio Gimenes Benega, Ricardo Jorge Espanhol Andrade, Guilhermino José Macedo Fechine Jun 2020

Thermal Conductivity Performance Of 2d Hbn/Mos 2/Hybrid Nanostructures Used On Natural And Synthetic Esters, Jaime Taha-Tijerina, Hélio Ribeiro, Karla Aviña, Juan Manuel Martínez, Anna Paula Godoy, Josué Marciano De Oliveira Cremonezzi, Milene Adriane Luciano, Marcos Antônio Gimenes Benega, Ricardo Jorge Espanhol Andrade, Guilhermino José Macedo Fechine

Manufacturing & Industrial Engineering Faculty Publications

In this paper, the thermal conductivity behavior of synthetic and natural esters reinforced with 2D nanostructures-single hexagonal boron nitride (h-BN), single molybdenum disulfide (MoS2), and hybrid h-BN/MOS2-were studied and compared to each other. As a basis for the synthesis of nanofluids, three biodegradable insulating lubricants were used: FR3TM and VG-100 were used as natural esters and MIDEL 7131 as a synthetic ester. Two-dimensional nanosheets of h-BN, MoS2, and their hybrid nanofillers (50/50 ratio percent) were incorporated into matrix lubricants without surfactants or additives. Nanofluids were prepared at 0.01, 0.05, 0.10, 0.15, and 0.25 weight percent of filler fraction. The experimental …

Go to article

Development Of Water Coning Control Design Metrics In Naturally Fractured Reservoirs, Samir Prasun Jun 2020

Development Of Water Coning Control Design Metrics In Naturally Fractured Reservoirs, Samir Prasun

LSU Doctoral Dissertations

Naturally fractured reservoirs (NFRs) with bottom-water are known for their instant water breakthrough and severe water coning that reduces oil recovery. This is because water channels through the highly permeable fractures easily connecting the well to the aquifer bypassing the oil contained in the matrix. Remedial techniques such as producing below critical-oil rate, optimizing the well spacing and installing the downhole water sink (DWS)/ downhole water loop (DWL) technology, have already been successfully tested in single-porosity reservoirs (SPR). However, applicability of these techniques in NFRs are unknown since only a few studies have been performed on their feasibility in NFRs, …

Go to article

Feasibility Of Electric Field Assisted Clogging Reduction In Cold Gas Spraying Nozzle, Hendric Tronsson Jun 2020

Feasibility Of Electric Field Assisted Clogging Reduction In Cold Gas Spraying Nozzle, Hendric Tronsson

ENGS 88 Honors Thesis (AB Students)

The relatively novel cold spraying process expands its range of applications constantly. In order to continue this trend, this process still has various hurdles that need to be overcome such as clogging. Clogging within the cold gas spraying process causes porous coatings with less material properties and lower durability; a solution is needed in order to reduce the clogging and so expand the cold gas spraying applications. This study aimed to explore the feasibility of using an electric field to reduce clogging. To do so a simplified channel was used to simulate charged particle trajectory shifts under the influence of …

Go to article

Stochastic Kriging For Random Simulation Metamodeling With Known Uncertainty, Wang Bo, Gea Haechang, Junqiang Bai, Yudong Zhang, Gong Jian, Weimin Zhang Jun 2020

Stochastic Kriging For Random Simulation Metamodeling With Known Uncertainty, Wang Bo, Gea Haechang, Junqiang Bai, Yudong Zhang, Gong Jian, Weimin Zhang

Journal of System Simulation

Abstract: Uncertainty-based design has been widely carried out these years. In order to deal with the problems with large amount of calculation, a stochastic kriging for random simulation metamodeling with known uncertainty was derived, which firstly included intrinsic uncertainty in metamodel initial formulation to fully account for inputs uncertainty, and then incorporated the correlationships of intrinsic uncertainty among all observed points. Several examples with known uncertainty were also conducted, in which the proposed method shows much better variance predictions than other similar methods. Simulation results show the proposed method is a more general form of kriging, which can also …

Go to article

Perfect Recovery (2,N) Color Visual Cryptography Scheme, Xianhuan Zhang, Zhengxin Fu, Ouyang Dan, Bin Yu Jun 2020

Perfect Recovery (2,N) Color Visual Cryptography Scheme, Xianhuan Zhang, Zhengxin Fu, Ouyang Dan, Bin Yu

Journal of System Simulation

Abstract: Based on XOR operation and combining the characteristic of computer display technology, a perfect recovery (2,n) color visual cryptography scheme was proposed. Sharing algorithm of color secret image was designed on the basis of constructing row vectors${{V}_{1}},{{V}_{2}},\cdots ,{{V}_{n}}$. Through computing shares by XOR operation and dealing with recovery image, the secret image was recovered. The experimental results show that the scheme on the basis of keeping the simplicity in the reconstruction phase of visual cryptography can realize the secret image perfect recovery with low pixel expansion for price. Each participant only needs to carry a share …

Go to article

Hybrid Quantum-Behaved Particle Swarm Optimization Algorithm For Solving Mould Job Shop Scheduling Problem, Zhou Kai, Wang Yan, Zhicheng Ji Jun 2020

Hybrid Quantum-Behaved Particle Swarm Optimization Algorithm For Solving Mould Job Shop Scheduling Problem, Zhou Kai, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: Quantum-behaved particle swarm optimization has better performance compared with particle swarm optimization, but it still has the problem of getting trapped into local optimum with premature convergence. According to the above problem, a hybrid algorithm included quantum-behaved particle swarm optimization and bat algorithm was proposed. On the one hand, the random walk strategy of bat algorithm was used to avoid getting into local optimum, on the other hand, the speed changing of bats’ sound was learned to transform the factor of quantum-behaved particle swarm optimization. The proposed algorithm was tested on five benchmark functions and a mould job shop …

Go to article

Optimization Sensing Slot Under Transmission Collision Of Primary User And Secondary User In Cognitive Radio System, Chen Song, Nae Zheng, Wang Sheng Jun 2020

Optimization Sensing Slot Under Transmission Collision Of Primary User And Secondary User In Cognitive Radio System, Chen Song, Nae Zheng, Wang Sheng

Journal of System Simulation

Abstract: In the cognitive radio system, that the primary user (PU) has collision with the secondary user (SU) when the secondary user (SU) was detected properly was considered. The queuing theory was introduced and the PU’s appearance pattern was described by M/M/1 model. Considering the length of the transmitting slot, detection probability and transmitting collision, the function of spectrum usage and transmitting time were established based on the PU’s appearance pattern. The existence of the maximum value of spectrum usage in the definition domain of the transmitting time was proved by theoretical derivation in some condition. The simulation results provide …

Go to article

Numerical Simulation Of Cavitation And Failure Analysis In Hydraulic Loader, Mo Li, Yang Qi, Yumei Wang Jun 2020

Numerical Simulation Of Cavitation And Failure Analysis In Hydraulic Loader, Mo Li, Yang Qi, Yumei Wang

Journal of System Simulation

Abstract: Using software CFX with SST κ-ω model and Rayleigh-Plesset cavitation model, the numerical simulation of 3-D steady flow with water liquid and water vapour two phases in whole flow passage of hydraulic loader was conducted. The influences of different parameters (inlet flow rate, rotational speed and blade angle) on cavitation of hydraulic loader were studied. The results show that, under small flow rate, large blade angle (≥60°) and low speed (≤3 000 r/min), cavitation is light. At different working conditions, where cavitation appears in radial direction of position is the same. The cavitation mainly distributes where the r/R …

Go to article

Study On Model-Based Visual Servoing With Reconstructed 2d Features, Guoliang Zhang, Jixiang Du, Zhanni Wang, Wang Tian Jun 2020

Study On Model-Based Visual Servoing With Reconstructed 2d Features, Guoliang Zhang, Jixiang Du, Zhanni Wang, Wang Tian

Journal of System Simulation

Abstract: To overcome the defect of camera retreat in image based visual servoing, a model-based visual servoing incorporated 2D image based visual servoing with 3D features was proposed. The robot visual servoing model was established by altering traditional two dimensional feature to three dimensional features based on traditional IBVS control structure. Furthermore, combined with the Simulink software, simulation model was established and motion characteristics of two methods were analyzed and compared in image space and Cartesian space. The experiment results confirm the feasibility and effectiveness of the proposed method.

Go to article

Improved Dv-Hop Localization Algorithm Based On Average Hopping Distance And Position Optimization, Zhipu Zhao, Wu Dong, Wang Yan, Zhicheng Ji Jun 2020

Improved Dv-Hop Localization Algorithm Based On Average Hopping Distance And Position Optimization, Zhipu Zhao, Wu Dong, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: To overcome the low positioning accuracy caused by the imprecise estimated distance and the accumulative location error, an improved DV-Hop localization algorithm based on Wireless Sensor Network was proposed. This method, taking the summation of the beacon node average jump distance based on the weighted error correction as its average distance, was used to reduce the average jump distance error. Besides, an improved least square method was used to process the accumulative location error. The simulation results show that the improved localization algorithm performs greatly better, both in distance estimation and positioning accuracy, than the traditional DV-Hop localization algorithm, …

Go to article

Node Selection Of Collaborative Tracking Based On Particle Filter, Chen Ying, Xuexue Cheng Jun 2020

Node Selection Of Collaborative Tracking Based On Particle Filter, Chen Ying, Xuexue Cheng

Journal of System Simulation

Abstract: Due to the problem of target tracking in video sensor networks, a new algorithm was proposed for cooperative monitoring and tracking of node selection based on particle filter. The method obtained posterior distribution through particle filtering in tracking problem and got the information entropy to evaluate the estimate uncertainty. Background modeling and the phase division were applied to extract target blob, and pixels number of the target blob was calculated to measure detection information. Confidence measure of nodes was determined based on the two factors to realize the optimization of the selected node and then track by particle filter …

Go to article

Online Identification And Simulation Of Multiple Model Based On Minimum Entropy Clustering, Xiaopeng Zhao, Yongchun Zhang Jun 2020

Online Identification And Simulation Of Multiple Model Based On Minimum Entropy Clustering, Xiaopeng Zhao, Yongchun Zhang

Journal of System Simulation

Abstract: An online identification algorithm for multiple model based on minimum entropy clustering was investigated. The number of local models and corresponding weights was calculated by the entropy based fuzzy subtractive clustering approach, and the regularity degree of the local system was considered along with the clustering process. Parameters of local models could be estimated online by the weighted recursive least square method. The waste heat recovery Organic Rankine Cycles system was used to demonstrate the algorithm. The result shows the identified multi-model not only can reach an accuracy and reliability identification result, but also has a stronger self-adaptability …

Go to article

Method Of Hardware-In-The-Loop (Hwil) Simulation For Pose Movement Of Vertical Launching Aerocraft With Continuous Rotation In Yaw, Chengsheng Liu, Zhang Qing Jun 2020

Method Of Hardware-In-The-Loop (Hwil) Simulation For Pose Movement Of Vertical Launching Aerocraft With Continuous Rotation In Yaw, Chengsheng Liu, Zhang Qing

Journal of System Simulation

Abstract: There are defects in the pose movement simulation of vertical launching aerocraft which can circumrotate continuously in yaw with three -axis flight motion simulator. Based on analysis of these defects, a four-axis project which could be applied to the situation of the changing range of vehicle pitch pose and vehicle roll attitude more than ±180° and the changing range of vehicle course pose towards infinite greatness was proposed. The structure of the four-axis flight motion simulator was analyzed and the control model was made. Above all, a four-axis concerted control law was designed with" switching movement mechanism", and a …

Go to article

Research Of Intrusion Alert Aggregation Based On Spatial And Temporal Density, Zhang Jing, Hengjun Wang, Junquan Li, Bin Yu Jun 2020

Research Of Intrusion Alert Aggregation Based On Spatial And Temporal Density, Zhang Jing, Hengjun Wang, Junquan Li, Bin Yu

Journal of System Simulation

Abstract: Distributed Intrusion Detection System has created the problem to investigate a mass of duplicate alerts and high false positive rate in practical applications. Based on DBSCAN, density based spatial and temporal clustering of applications with noise (DBS&TCAN) algorithm was proposed by introducing temporal density. The approach aggregated partial alerts based on spatial density, and merges partial aggregation on the basis of temporal density. The effectiveness of the algorithm was demonstrated by the intrusion detection evaluation dataset. The comparative experiments and analysis show that the algorithm is effective in alert aggregation and gives better results in terms of real time …

Go to article

Study On Tracking Filter Algorithms For Nonballistic Targets In Near Space, Yajie Cao, Junlong Li, Qin Lei Jun 2020

Study On Tracking Filter Algorithms For Nonballistic Targets In Near Space, Yajie Cao, Junlong Li, Qin Lei

Journal of System Simulation

Abstract: Recently, different countries made rapid developments in the field of hypersonic aircraft in near space. The successful flight tests of hypersonic aircraft X-51A and HTV-2 were representative.They adopted the way of nonballistic maneuver flight whose motion trajectory was characterized by “hopping”, which existed the problems of difficulties of nonballistic target acceleration estimation, trajectory tracking and prediction. Four typical nonballistic maneuver models of near space targets of tracking filter are introducedand then target ballistic equation and design of tracking filter are introduced. At last, an estimation of four tracking filter ways is maken towards target acceleration. The effect of particle …

Go to article

Research On Ontology-Meta Modeling Method For Equipments Sos (System Of System) Combat Simulation, Zhang Shen, Haohua Xu, Jingye Wang Jun 2020

Research On Ontology-Meta Modeling Method For Equipments Sos (System Of System) Combat Simulation, Zhang Shen, Haohua Xu, Jingye Wang

Journal of System Simulation

Abstract: Aiming at the strict standard and difficulties of equipments SOS combat simulation modeling, an ontology-meta modeling method was put forward. Based on the analysis of equipments SOS combat, the basic notional units were abstracted: function unit, combat organize, combat maneuver, combat event, and combat environment, and the units mapping into UOPEE (unit, organization, proceeding, event and environment) which was a maturity and combined models collect, then constituted the descriptive UOPEE architecture with the UML method, obtaining the cyber-model architecture based on component designing and realizing method. This method makes the equipments SOS combat model easy to mapping and integration …

Go to article

Scheme For Detecting Dos Attack In Bluetooth Low Energy, Qilin Wang, Yicai Huang, Bin Yu Jun 2020

Scheme For Detecting Dos Attack In Bluetooth Low Energy, Qilin Wang, Yicai Huang, Bin Yu

Journal of System Simulation

Abstract: Aiming at the problem that Bluetooth Low Energy is vulnerable to DoS Attack, an alive degree model combining entropy theory was established. Bluetooth Low Energy DoS Attack detecting scheme based on this model was designed. The scheme chose some elements to construct alive volume, which showed the stable distribution in normal communications, and the distribution was destroyed when subjected to DoS attacks. Using alive degree to reflect the distribution of alive volume, the DoS Attack was detected via the variation of alive degree. The theory analysis and experiment results show that, the scheme can effectively detect the DoS Attack …

Go to article

Control Strategy Of Bionic Eyes Movement In Gaze Shifts, Xiaohui Wang, Ma Xin, Bin Qin, Yibin Li Jun 2020

Control Strategy Of Bionic Eyes Movement In Gaze Shifts, Xiaohui Wang, Ma Xin, Bin Qin, Yibin Li

Journal of System Simulation

Abstract: For the gaze shifts with asymmetrical depth in the horizontal plane of bionic eyes, a piecewise control strategy of eye-head coordinative motion was proposed according to the amplitude of gaze shifts, and the motion model of bionic eyes was developed. When the amplitude of gaze shifts is smaller than the head movement threshold, the eyes move only by saccade-vergence. When the amplitude is larger than the head movement threshold and smaller than the saturation threshold of eye movement with head at rest, gaze shifts are accomplished with eye-head coordinative movements. When the amplitude is larger than the saturation threshold, …

Go to article

Research Of Remote Sensing Image Classification Technology Based On Multi-Feature Combining And Bow Model, Li Ke, You Xiong, Du Lin Jun 2020

Research Of Remote Sensing Image Classification Technology Based On Multi-Feature Combining And Bow Model, Li Ke, You Xiong, Du Lin

Journal of System Simulation

Abstract: A new algorithm of image classification of multi feature combination and BoW model was proposed. SIFT, GIST, Census and Gabor color, and many other types of features were extracted from the images, and then through the experimental analysis to determine the best feature combination. According to the general K-means algorithm which did not consider the weight of each features, different feature component was put forward by using automatic weighted k-means algorithm, respectively SIFT, GIST, Gabor feature construct weights based on image features of vocabulary, using the soft coding algorithm for image coding, and using the SVM algorithm …

Go to article

Design And Implementation Of Secure Usb Connection, Songyin Zhao, Bin Yu Jun 2020

Design And Implementation Of Secure Usb Connection, Songyin Zhao, Bin Yu

Journal of System Simulation

Abstract: Aiming at the deficiency of present secure solutions countering USB-based Hardware Trojan Horse, BadUSB, bus wiretapping and other new attack technologies, a secure connection scheme applying to any USB device was proposed. In scheme, mutual authentication and key exchange were implemented by extending the standard device request in the hub driver and USB device framework driver to prevent the creation of malicious USB connection. Meanwhile, all the data transferred of the created USB connection would be filter encrypted by USB bus driver and USB device framework driver to rebel the monitor of bus. The experiment results show that the …

Go to article

Research On Pedestrian Crossing Road Skills Assist Training System Based On Game Model, Meiliang Wang, Huagen Wan, Jianping Gu Jun 2020

Research On Pedestrian Crossing Road Skills Assist Training System Based On Game Model, Meiliang Wang, Huagen Wan, Jianping Gu

Journal of System Simulation

Abstract: With the rapid growth of number of family cars in China, there are more and more road accidents, so pedestrians will undoubtedly become the biggest victims in the accidents. Thus it is of great significance to develop a road training system that is able to improve the ability of the pedestrians to process the integrated information of the traffic flow, and reduce the risk of pedestrian in accidents when crossing the roads. Based on the key researches on dynamic virtual traffic scene, human-computer interaction and virtual objects collision detection, with the application of technology of virtual reality and 3 …

Go to article

Design Of Ble Key Agreement Scheme Based On Hash Chain, Yibo Huang, Yicai Huang, Bin Yu Jun 2020

Design Of Ble Key Agreement Scheme Based On Hash Chain, Yibo Huang, Yicai Huang, Bin Yu

Journal of System Simulation

Abstract: Aiming at the problem that BLE Secure Simple Pairing protocol is vulnerable to eavesdropping and man-in-the-middle attacks, a BLE key agreement scheme based on hash chain was proposed. The scheme realized mutual authentication and link key agreement applying the unidirectivity and crashworthiness of hash chain. Update mechanism of the hash chain was designed to prevent from reuse of hash chain node values. The security analysis of BAN logic and experiment results show that, the scheme can effectively resist eavesdropping and man-in-the-middle attacks. Meanwhile, it has low storage and computation overheads.

Go to article

Study On Effects Of T-Spur-Dikes On Flow Characteristics In 90° Bend Channel By Large Eddy Simulation, Wenli Wei, Panpan Li, Shipeng Shao, Yuling Liu Jun 2020

Study On Effects Of T-Spur-Dikes On Flow Characteristics In 90° Bend Channel By Large Eddy Simulation, Wenli Wei, Panpan Li, Shipeng Shao, Yuling Liu

Journal of System Simulation

Abstract: In order to solve the problems of river erosion at concave bank and of sediment deposition at convex bank in actual bend rivers, the 3D hydraulic characteristics of bend channel with spur-dikes must be studied. The gas-liquid two-phase large eddy model was used to numerically simulate the hydraulic characteristics of flow in a 90° bend channel with a spur-dike. Comparisons of the simulated longitudinal velocity with the experimental data show a good agreement, which indicates that the large eddy model is an effective way to study the hydraulic characteristics of bend channels. The analysis of the distribution of velocity …

Go to article

Research And Implementation Of Simulation For Aircraft Crossing The Low-Level Wind Shear Area, Zhigang Su, Chen Qi, Jingtang Hao Jun 2020

Research And Implementation Of Simulation For Aircraft Crossing The Low-Level Wind Shear Area, Zhigang Su, Chen Qi, Jingtang Hao

Journal of System Simulation

Abstract: Low-level wind shear seriously affects the safety of approach and departure of flights, the flight simulation system is utilized for analyzing low-level wind shear influences on aircraft take-off and landing, which is of great significance for seeking the safety circumvention strategy of aircraft crossing the core of the storm. With software, Fluent, the system simulated the regional wind field of low-level wind shear, and utilized the open source flight simulator, FlightGear, as the aircraft simulation platform. The system sent the wind speed data as the input of system via UDP(User Datagram Protocol) interface and the influences on aircraft flight …

Go to article

Robustness Research For Adaptive Control Algorithms Of Pipe Conveying Fluid Vibration, Chen Bing, Yuanyuan Huang, Zhongjun Yin Jun 2020

Robustness Research For Adaptive Control Algorithms Of Pipe Conveying Fluid Vibration, Chen Bing, Yuanyuan Huang, Zhongjun Yin

Journal of System Simulation

Abstract: Pipes with supported ends may lose their dynamic stability due to parametric instability when they convey pulsating fluid. the piezoelectric actuators were taken as the control actuators, and built a controlling mathematical model of the pipeline system. Then aiming at the traditional PID controller’s poor robustness on pipeline system parameters, MRAC system and MRAC system based on adaptive gain of the PD were designed on the basis of Lyapunov stability theory, not only the vibration peak values of the pipeline system were suppressed in a short time, but also the controllers had better robustness on pipeline system parameters. Control …

Go to article

Sybil Attack Detection Scheme Design In Zigbee Network, Meigen Huang, Bin Yu, Zhiyin Kong Jun 2020

Sybil Attack Detection Scheme Design In Zigbee Network, Meigen Huang, Bin Yu, Zhiyin Kong

Journal of System Simulation

Abstract: Aiming at the problem of Sybil which attacks and destroys the resource allocation, routing discovery and data aggregation in ZigBee network, a scheme to detect Sybil attacks was proposed. The scheme established a doubt mechanism of Sybil node to mark child nodes in the same location as well as communication distance inconsistent geographical distance. The scheme designed a identified processes of Sybil node via father joint legal neighboring nodes transmitting a random number to the suspected Sybil nodes on different channels simultaneously, identifying Sybil nodes by its correctness. Safety analysis and experiment results show that the proposed scheme has …

Go to article

Research On Simulation Optimization Of Container Terminal’S Machinery Configuration, Zhaohui Duan, Bingliang Song Jun 2020

Research On Simulation Optimization Of Container Terminal’S Machinery Configuration, Zhaohui Duan, Bingliang Song

Journal of System Simulation

Abstract: The optimization of the machinery allocation under the double constraints of maximized efficiency for loading and unloading processes and optimal machinery usage, and the optimal configuration of bridge cranes under discrete operation modes for a single ship were instigated through modeling with the simulation software Extendsim. It was found that the real-time recording method is a more straightforward and convenient way to investigate the optimal mechanical configuration and double constraints lead to different but more reasonable results than that was obtained under the single constraint on the best mechanical configuration. Due to the discrete characteristics of the bridge crane …

Go to article

Research On Identification Of Induction Motor Parameters Ased On Nameplate Data And Pso, Xingwu Wang, Bingshu Wang, Zhaoyan Zhang, Zhibin Liu Jun 2020

Research On Identification Of Induction Motor Parameters Ased On Nameplate Data And Pso, Xingwu Wang, Bingshu Wang, Zhaoyan Zhang, Zhibin Liu

Journal of System Simulation

Abstract: A new method was proposed based on motor nameplate and particle swarm optimization (PSO) for identification of motor equivalent circuit parameters. The method effectively solved to present problems of motor equivalent circuit parameters identification method. An accurate motor equivalent circuit was built by introducing an equivalent stray-loss resistance, mechanical loss, and slip loss of ring brushes for wound motor. An identification optimization model of equivalent circuit was established based on motor nameplate parameters and motor equivalent circuit’s calculating parameters. Solving optimization model with PSO was achieved a higher probability optimization goals. The motor electrical parameters were calculatd at …

Go to article

First Prev Next Last