Complexity Evaluation Method of Electromagnetic Environment Oriented to Communication Equipment Based on Statistic Theory

2014 ◽  
Vol 568-570 ◽  
pp. 1331-1335 ◽  
Author(s):  
Shao Jun Zhang ◽  
Dong Lin Su ◽  
Jian Wang ◽  
Rui Wang
Keyword(s):  
Evaluation Method ◽  
Correlation Energy ◽  
Subjective Evaluation ◽  
Correlation Factor ◽  
Electromagnetic Environment ◽  
Energy Correlation ◽  
Statistical Concept ◽  
Working Parameters ◽  
Communication Equipment ◽  
Polarization Correlation

To improve the objectivity and accuracy of evaluation for electromagnetic environment complexity and its influence on communication equipment, a subjective complexity evaluation method of electromagnetic environment oriented to the communication equipment is presented based on sensitivity and RF protection ratio of communication equipment. Based on statistical concept, the energy correlation factor is modified, and modulation and polarization correlation concept are imported into this method, by which the factor of energy correlation is modified and the subjective evaluation is made by analyzing the time domain correlation, frequency domain correlation, energy domain correlation, modulation correlation and polarization correlation of the electromagnetic environment. These simulation results indicate that communication equipment with various working parameters are influenced differently under the same electromagnetic environment. Namely, the complexities of electromagnetic environment for communication equipment with various working parameters are different.

scholarly journals An Evaluation Method of Mode Switching Quality for Double-Belt Continuously Variable Transmission

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lanchun Zhang ◽  
Zhongwei Zhu ◽  
Bin Huang ◽  
Tianbo Wang
Keyword(s):  
Evaluation Method ◽  
Evaluation Model ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Transmission Efficiency ◽  
Continuously Variable Transmission ◽  
Mode Switching ◽  
Evaluation Indexes ◽  
Variable Transmission ◽  
Driver’S Intention

In order to improve the transmission efficiency and carrying capacity of conventional single-belt continuously variable transmission (CVT), one new type of dual-belt CVT is proposed in this paper. Under the situation that this new dual-belt CVT should be switched between single- and dual-belt modes frequently according to driver’s intention and road conditions, so five objective evaluation indexes of mode switching quality for the dual-belt CVT are proposed, considering the aspects of vehicle power, comfort, and transmission durability comprehensively. Then, the objective evaluation model of mode switching quality is established by the BP neural network optimized by the genetic algorithm. It is found that the prediction results are consistent with the subjective evaluation. After analyzing the influence of the selected five evaluation indexes on the prediction results, it is obvious that these five evaluation indexes of mode switching quality for dual-belt CVT are reasonable.

Similarities and differences between virtual and actual pants

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Siti Zulaikha Binti Zulkifli ◽  
KyoungOk Kim ◽  
Masayuki Takatera
Keyword(s):  
Sensory Evaluation ◽  
Quantitative Evaluation ◽  
Evaluation Method ◽  
Subjective Evaluation ◽  
Evaluation Criteria ◽  
Correlation Coefficients ◽  
Principal Component ◽  
Content Type ◽  
Similarities And Differences ◽  
The Relationship

PurposeThis study aimed to clarify the criteria for subjective evaluation of the similarities and differences between virtual and actual pants and propose a quantitative evaluation method for those similarities and differences based on geometric features related to the evaluation.Design/methodology/approachUsing patterns, we made five pairs of actual pants for a dummy in five fabrics. We simulated virtual pants with a 3-D simulator. Sensory evaluation was conducted with images of the virtual and actual pants: 20 participants compared the images based on a questionnaire. For the structure of evaluation, the authors undertook analysis of variance and principal component analysis. The actual and virtual pants were geometrically compared using the 3-D scanned data. To investigate the relationship between quantitative and sensory evaluation, the authors calculated the correlation coefficients.FindingsThe authors found that subjects perceived the differences between actual and simulated pants. When comparing the virtual and actual pants, the criteria for the differences were the silhouette from the front view, hem width, waist and wrinkles. Using differences in the hem width, it would be possible to evaluate the differences between actual and simulated pants. Roughness and smoothness of the silhouette also affected evaluation.Originality/valueThe authors clarified the evaluation criteria for the similarities and differences between virtual and actual pants. The authors proposed a quantitative evaluation method for the similarities and differences between virtual and actual garment based on our criteria. This study will be of benefit to 3-D simulator users and developers.

A creep control for distributed rear wheel drive bus

2020 ◽  
Vol 234 (14) ◽  
pp. 3302-3315
Author(s):  
Yuan Wang ◽  
Liangxin Yuan ◽  
Hao Chen ◽  
Peng Du ◽  
Xiaomin Lian
Keyword(s):  
Control Strategy ◽  
Evaluation Method ◽  
Performance Metrics ◽  
Subjective Evaluation ◽  
Rear Wheel ◽  
Vehicle Speed ◽  
Control Parameters ◽  
Loop Control ◽  
Driving Experience ◽  
Start Up

Creep control is a kind of start-up control for electric vehicle. In the paper, two closed-loop control is contained in the creep control strategy. Proportional control with torque limitation, which adjusts vehicle speed, is the outer-loop control; and anti-slip control is the inner-loop control. In this way, the vehicle speed indicates no overshoot and has uniform convergence with driving torque. Moreover, the vehicle can start up on low adhesion or split road, and the driver can control the creep speed by the brake pedal only, so that the driver’s operation is reduced. Subjective evaluation method is proposed to determine the control performance metrics, and then the mathematical relationship between the performance metrics and the control parameters is established. The tuning method of the control parameters is proposed according to those performance metrics, which mitigates the workloads of calibration and provides a better driving experience. Some simulations and real vehicle experiments are conducted to verify that the control strategy has an expected performance.

Garment opening position evaluation using kinesiological analysis of dressing activities: case study of physically disabled people with scoliosis (PDPS)

2017 ◽  
Vol 88 (20) ◽  
pp. 2303-2318 ◽  
Author(s):  
Yan Hong ◽  
Xianyi Zeng ◽  
Pascal Bruniaux ◽  
Antonela Curteza ◽  
Maier Stelian ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Subjective Evaluation ◽  
Life Quality ◽  
Disabled People ◽  
Physically Disabled ◽  
Standard Time ◽  
Psychological Indicators ◽  
Physical Autonomy ◽  
Physically Disabled People

Garment opening is strongly related to the daily life quality of physically disabled people with scoliosis (PDPSs). This research proposes a kinesiological evaluation method to investigate the influence of garment opening positions in dressing activities of PDPSs. For this purpose, dressing activities are firstly deconstructed into several motions. The performance of different garment opening positions is represented by the performance of the wearer carrying out different motions in dressing activities. The proposed evaluation method is based on the Completion Level (CL), which includes both physical and psychological indicators: Motion Standard Time (MST), Motion Difficulty Degree (MDD) and Motion Independence Degree (MID). MST is a physical indicator regarding the standard time to complete a motion in the dressing activities. It reflects the physical autonomy of the wearer in the dressing activity. MDD and MID are psychological indicators, which are developed to evaluate the psychological independence and difficulty of dressing motions respectively. Subjective evaluation is used to obtain data regarding MDD and MID. Due to the fact that there is always vagueness and uncertainly in the subjective evaluation, fuzzy set theory is applied to the data process regarding MDD and MID. A case study is presented to explain the implications of the proposed method. The case study indicated that garment opening positions have an influence on the dressing activity. PDPS will benefit from a well-constructed garment, and a proper positioning of the opening, in terms of both physical and psychological aspects.

GMSK Modulation Design in General Hardware-in-the-Loop Communication Simulator

2012 ◽  
Vol 182-183 ◽  
pp. 602-605
Author(s):  
Qian Zhang
Keyword(s):  
Wireless Communications ◽  
Design Thinking ◽  
Software Radio ◽  
Hardware In The Loop ◽  
Electromagnetic Environment ◽  
Communication Signals ◽  
Software Simulation ◽  
Reference Simulation ◽  
Environment Simulation ◽  
Communication Equipment

Hardware-in-the-loop communication equipment simulation is an important step of the development about communications and electromagnetic environment simulation. Reference to the "software radio" design thinking, the source library is generated by the software and different communication signals are generated by the fixed hardware frame. The system achieves “versatility”. GMSK in wireless communications has been widely applied. It is one of the important signals generated by the simulator. Based on analysis of the structure, the paper introduces the design of the simulator. It also provides the software simulation of Matlab. It provides a reference simulation for communications equipment and electromagnetic environment simulation.

Based on Reliability Importance Measures Method of Comprehensive Evaluation of Electric Power Communication Equipment

2014 ◽  
Vol 496-500 ◽  
pp. 2725-2728 ◽  
Author(s):  
Hui Sheng Gao ◽  
Xi Peng Qiao ◽  
Hui Fang Wang
Keyword(s):  
Communication Network ◽  
Electric Power ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Importance Measure ◽  
Service Reliability ◽  
Comprehensive Evaluation Method ◽  
Inherent Structure ◽  
The Impact ◽  
Communication Equipment

Currently, the evaluation methods of importance measures such as structure importance measure, criticality reliability importance and B-reliability importance, have some shortcomings that the evaluation results are not comprehensive enough and the scope of usage. In order to accurately evaluate the importance measures of equipment, and to reflect the impact of the equipment on the communication network, a comprehensive evaluation method of importance measure is put forward. According to the influence of inherent structure of system and service reliability, the importance measure of equipment is calculated. By the coefficient modification, it can accurately evaluate comprehensive evaluation of electric power communication equipment based on reliability importance measures. Example result verifies the feasibility and validity of the comprehensive evaluation method.

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