Simulation Design on Kalman Filter with Mobile and No-Intersymbol Interference System Based on MATLAB

2014 ◽  
Vol 716-717 ◽  
pp. 1267-1271
Author(s):  
Liang Jun Yu ◽  
Li Hua Sun ◽  
Cui Cui Huang
Keyword(s):  
Mathematical Model ◽  
Kalman Filter ◽  
Intersymbol Interference ◽  
Digital Signal ◽  
State Equation ◽  
Simulation Design ◽  
Validity And Reliability ◽  
Factors Affecting ◽  
Before And After ◽  
Crosstalk Signal

Intersymbol Interference (ISI) problem is one of the main factors affecting the baseband transmission performance of mobile communication’s digital signal which can not only reduce the transmission quality of the information but also can result in misinformation and false pass of information and provide troubles to the user and communications. In order to minimize the error rate, we propose a new digital equalization filter and establish the basic model of the digital filter and introduce non-linear Kalman observation equation and the state equation into the model and design partial differential mathematical model of the Kalman filter and develop MATLAB solver based on the mathematical model. In order to verify the validity and reliability of Kalman filter algorithms and mathematical procedures designed in this paper, it uses MATLAB toolbox to simulate the filter of mobile crosstalk signal and obtains amplitude-frequency characteristics and time-domain characteristics before and after filtering. By comparison, we can see that the filter can eliminate the high frequency crosstalk signal which provides technical reference for the study of the problem of crosstalk between the mobile communication codes.

scholarly journals Evaluation of Factors Affecting Employees' Performance Using Artificial Neural Networks Algorithm: The Case Study of Fajr Jam

2019 ◽  
Vol 12 (10) ◽  
pp. 86
Author(s):  
Mohammad Rahmanidoust ◽  
Jianguo Zheng
Keyword(s):  
Human Resources ◽  
Conceptual Model ◽  
Negative Impact ◽  
Validity And Reliability ◽  
Factors Affecting ◽  
Before And After ◽  
Neural Network Algorithm ◽  
Artificial Neural ◽  
Performance Statistics

Human resources are the most valuable assets of any organization. Therefore, human resources performance has the greatest impact on the organization's performance and its ability to operate. Many factors affect the performance of employees in organizations. In this research, we seek to evaluate the factors affecting the performance of Fajr Jam refinery employees. For this purpose, firstly, the literature of the research, the indicators affecting the performance of employees were identified and the conceptual model of the problem was formed. Then, the required data were collected using a standard questionnaire based on the conceptual model of the problem among employees of FJG Company. After assessing the validity and reliability of the collected data, it is time to evaluate the performance of the indicators. For this purpose, an artificial neural network algorithm was used to estimate the efficiency boundary values. After calculating the efficiency values in the presence of all the indices, each indices were eliminated from the conceptual model and again the efficiency values were estimated. Now, by comparing the performance statistics in the state before and after the removal of each indicator from the conceptual model, the degree and the mode of its effect are determined. The results of this study indicate that the "payroll" indicators, "environmental conditions" and "reporting culture" are the strengths of the system under review, and are now at an appropriate level. Also, the results indicate a negative impact on the indicators of "awareness", "system planning and preparation for critical situations," "amenities," "training," and "job security" in the system under review.

Research on Broadband Power Amplifier Adaptive Digital Pre-Distortion Based on FPGA Technology

2014 ◽  
Vol 556-562 ◽  
pp. 1761-1765
Author(s):  
Yu Shu Xiong ◽  
Sheng Yi Ran
Keyword(s):  
Power Amplifier ◽  
Phase Difference ◽  
Signal Transmission ◽  
Digital Signal ◽  
Good Effect ◽  
Validity And Reliability ◽  
Adaptive Function ◽  
Before And After ◽  
Transmission Quality ◽  
Digital Distortion

In this paper, we use the adaptive function model to improve FPGA digital pre-distortion technique, design the adaptive pre-distortion function and algorithm, and adopt PC-CFR technique to process digital distortion problem in high order modulation, and obtain very good effect of digital signal processing. In order to verify the validity and reliability of PC-CFR technology, we use Agilent 89600 VSA software to exquisite power output signal before and after the broadband power amplifier pre-distortion. The results shows that before PC-CFR pre-distortion processing, phase difference of AM/PM reaches a maximum of 0.258, signal distortion is more serious; and after the PC-CFR pre-distortion processing, phase difference is only 0.021, the minimum is 0.005, which controls the distortion signal and improves the signal transmission quality. It provides technical reference to study the broadband power amplifier technology.

An Empirical Investigation of Factors Affecting Stock Prices in Vietnam

2014 ◽  
pp. 74-89 ◽  
Author(s):  
Vinh Vo Xuan
Keyword(s):  
Exchange Rates ◽  
Crude Oil ◽  
Foreign Exchange ◽  
Stock Prices ◽  
Global Financial Crisis ◽  
Oil Prices ◽  
Foreign Exchange Rates ◽  
Factors Affecting ◽  
Crude Oil Prices ◽  
Before And After

This paper investigates factors affecting Vietnam’s stock prices including US stock prices, foreign exchange rates, gold prices and crude oil prices. Using the daily data from 2005 to 2012, the results indicate that Vietnam’s stock prices are influenced by crude oil prices. In addition, Vietnam’s stock prices are also affected significantly by US stock prices, and foreign exchange rates over the period before the 2008 Global Financial Crisis. There is evidence that Vietnam’s stock prices are highly correlated with US stock prices, foreign exchange rates and gold prices for the same period. Furthermore, Vietnam’s stock prices were cointegrated with US stock prices both before and after the crisis, and with foreign exchange rates, gold prices and crude oil prices only during and after the crisis.

Factors Affecting Eyelid Crease Formation Before and After Silicone Frontalis Suspension for Adult-Onset Myogenic Ptosis

2015 ◽  
Vol 31 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Richard C. Allen ◽  
Esther S. Hong ◽  
M. Bridget Zimmerman ◽  
Leslie A. Morrison ◽  
Jeffrey A. Nerad ◽  
...  
Keyword(s):  
Adult Onset ◽  
Factors Affecting ◽  
Before And After ◽  
Frontalis Suspension

Simulation of oscillatory processes in the MVSTUDIUM package

2022 ◽  
Vol 14 (4) ◽  
pp. 139-148
Author(s):  
Aleksandr Poluektov ◽  
Konstantin Zolnikov ◽  
V. Antsiferova
Keyword(s):  
Mathematical Model ◽  
Friction Force ◽  
Computer Models ◽  
3D Models ◽  
Oscillatory Process ◽  
Suspension Point ◽  
Factors Affecting ◽  
2D And 3D ◽  
The Mathematical Model ◽  
Oscillatory Processes

The mathematical model and algorithms of oscillatory movements are considered. Various factors affecting the oscillatory process are considered. Oscillatory movements are constructed in the MVSTUDIUM modeling environment. The schemes of three computer models demonstrating oscillatory processes are determined: a model of a pendulum with a non-movable suspension point, a model of a pushing pendulum with friction force and a model of a breaking pendulum. Classes are being built to execute models with embedded properties, as well as with the ability to export the created classes to other models, and embed classes created by the program developer into the model. Creation of 2D and 3D models of oscillatory processes, an experiment behavior map and a virtual stand.

scholarly journals Tensile Testing with Cyclic Strain Holding to Analyze Dynamic Recrystallization of Pure Lead

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Mayu Muramatsu ◽  
Motomichi Koyama ◽  
Ikumu Watanabe
Keyword(s):  
Dynamic Recrystallization ◽  
Tensile Testing ◽  
Cyclic Strain ◽  
Tensile Tests ◽  
Pure Lead ◽  
Factors Affecting ◽  
Before And After ◽  
Dynamic Recrystallization Behavior ◽  
The Difference ◽  
Strain Responses

We analyzed the dynamic recrystallization of pure lead by tensile testing with cyclic strain holding at room temperature. The specimens were held at an identical strain and subsequently reloaded, providing the strength before and after the strain holding process. The difference in strength enables factors affecting dynamic recrystallization behavior to be analyzed through mechanical testing. For instance, the effects of strain rate on dynamic recrystallization were analyzed by comparing the results obtained from tensile tests with and without strain holding. This experimental technique demonstrated some parts of contribution of elastic strain, dynamic recovery, dynamic recrystallization, and necking to stress-strain responses.

An Implicit Algorithm of Solving Nonlinear Filtering Problems

2014 ◽  
Vol 16 (2) ◽  
pp. 382-402
Author(s):  
Feng Bao ◽  
Yanzhao Cao ◽  
Xiaoying Han
Keyword(s):  
Kalman Filter ◽  
Particle Filter ◽  
Nonlinear Filtering ◽  
State Equation ◽  
Nonlinear Filter ◽  
Filter Method ◽  
Simulation Methods ◽  
Current State ◽  
Numerical Simulation Methods ◽  
Kalman Filter Method

AbstractNonlinear filter problems arise in many applications such as communications and signal processing. Commonly used numerical simulation methods include Kalman filter method, particle filter method, etc. In this paper a novel numerical algorithm is constructed based on samples of the current state obtained by solving the state equation implicitly. Numerical experiments demonstrate that our algorithm is more accurate than the Kalman filter and more stable than the particle filter.

scholarly journals Factors Affecting the Implementation of Health and Safety in Supermarkets in Kenya

2015 ◽  
Vol 5 (2) ◽  
pp. 223
Author(s):  
Kaaria Ann Gaceri
Keyword(s):  
Health And Safety ◽  
Target Population ◽  
Corporate Identity ◽  
Human Resource Managers ◽  
Validity And Reliability ◽  
Safety Measures ◽  
Factors Affecting ◽  
Resource Managers ◽  
Commercial World ◽  
The Government

In today’s rapidly changing commercial world ‘retail design’ is taking on the great importance than ever before both in terms of selling a company’s products and promoting an organizations’ corporate identity (Onwong’a,Mamati, Kangu &Osongo, 2010) .The purpose of this study was to evaluate the factors affecting the implementation of health and safety measures in supermarkets in Kenya; A survey of Supermarkets in Kenya.The implementation of health and safety measures at workplaces is minimal and yet it goes without doubt that if properly implemented, workplace accidents, injuries and illness would decrease in number. The research study was thus to facilitate the understanding of the benefit to implementing health and safety measures, thereby enhancing the acceptance in organizations.The study was be guided by the following specific objectives, to establish whether leadership influences the implementationof health and safety measures in supermarkets in Kenya,to find out whether employee training influences the implementation of health and safety measures in supermarkets on Kenya,andto establish whether employee participation influences the implementation of health and safety measures in supermarkets in Kenya.  The study employed a descriptive research design (Sekaran, 2006).Data analysiswas aided by SPSS Version 17(Marija, 2008). The target population was the general retail merchandise in Kenya while the study population wasHuman Resource Department Staff in supermarkets with more than 10 outlets in Kenya. The study was a census of supermarkets with more than 10 outlets and hence the sample size was equal to the study population.Primary data was collected using self administered questionnaires. A pilot test was conducted to test the validity and reliability of the research instruments. The study employed descriptive statistics and data analysis was performed using both qualitative and quantitative techniques.The final findings were presented using pie charts and statistical tables. This study will be of value to the human resource managers of the general retail merchandise industry, the government,research institutions, scholars and other private institutions.

scholarly journals VALIDATION FOR THE PORTUGUESE LANGUAGE OF THE SIMULATION DESIGN SCALE

2015 ◽  
Vol 24 (4) ◽  
pp. 934-940 ◽  
Author(s):  
Rodrigo Guimarães dos Santos Almeida ◽  
Alessandra Mazzo ◽  
José Carlos Amado Martins ◽  
Cesar Eduardo Pedersoli ◽  
Laís Fumincelli ◽  
...  
Keyword(s):  
Teaching Strategy ◽  
Methodological Study ◽  
Simulation Design ◽  
Validity And Reliability ◽  
Validation Process ◽  
Translation Process ◽  
Instrument Translation ◽  
Sphericity Test ◽  
Student Version ◽  
Translation And Validation

ABSTRACT Considering the lack of tools to assess the results associated with the use of simulation as a teaching strategy, this study aimed to translate and validate to the Portuguese language the Simulation Design Scale (Student Version). A methodological study of instrument translation and validation was undertaken. After accomplishing all steps of the translation process, the validation process took place in the context of an event on critical patient care. In total, 103 registered nurses participated in the study. The validity and reliability of the scale, the pattern of correlation between variables, the sampling adequacy test and the sphericity test showed satisfactory results. As there is no connection among the groupings established in the exploratory factor analysis, it was decided to follow the division established in the original version. The scale was named Escala do Design da Simulação [in Portuguese]. It is concluded that the scale has good psychometric properties and an appropriate potential, although further research is needed for their consolidation.

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