The panel dataset which covered the socio-economic data of 31 provinces （municipalities and autonomous region） in China from 2000-2007 was used to do empirical analysis on the effect of abolishing agricultural taxes...The panel dataset which covered the socio-economic data of 31 provinces （municipalities and autonomous region） in China from 2000-2007 was used to do empirical analysis on the effect of abolishing agricultural taxes on farmers＇ income by referring to the fixed effect estimation method. It found that the abolition of agricultural taxes increased farmer＇s net income per capita by 2%. Combining with the results of empirical analysis, related policy suggestions were put forward to increase farmers＇ income.展开更多
A dead reckoning system for a wheeled mobile robot was designed, and the method for robot’s pose estimation in the 3D environments was presented on the basis of its rigid-body kinematic equations. After analyzing the...A dead reckoning system for a wheeled mobile robot was designed, and the method for robot’s pose estimation in the 3D environments was presented on the basis of its rigid-body kinematic equations. After analyzing the locomotion architecture of mobile robot and the principle of proprioceptive sensors, the kinematics model of mobile robot was built to realize the relative localization. Considering that the research on dead reckoning of mobile robot was confined to the 2 dimensional planes, the locomotion of mobile robot in the 3 coordinate axis direction was thought over in order to estimate its pose on uneven terrain. Because the computing method in a plane is rather mature, the calculation in height direction is emphatically represented as a key issue. With experimental results obtained by simulation program and robot platform, the position of mobile robot can be reliably estimated and the localization precision can be effectively improved, so the effectiveness of this dead reckoning system is demonstrated.展开更多
The method of error correction is one of key techniques of parallel robot. A new method of end error correction of 6-HTRT parallel robot is presented for engineering and researching on correlative theory of 6-HTRT par...The method of error correction is one of key techniques of parallel robot. A new method of end error correction of 6-HTRT parallel robot is presented for engineering and researching on correlative theory of 6-HTRT parallel robot. The method need calculate many kinematics equations of parallel robot such as position back solution, velocity Jacobin, position forward solution and error Jacobin. New methods presented for solving these questions are simpler and fitter for programming and calculating, because former methods are too complex to use in engineering. These questions may be solved by iterative method of numerical value which has fast velocity of calculating. These new methods may be used in other mechanism of parallel robot too, and so have wider using value. The experimental results demonstrate that the system may satisfy entirely high technical request and fit for engineering in new measures.展开更多
This paper proposes a precise localization algorithm for a quickly moving mobile robot.In order to localize a mobile robot with active beacon sensors,a relatively long time is needed,since the distance to the beacon i...This paper proposes a precise localization algorithm for a quickly moving mobile robot.In order to localize a mobile robot with active beacon sensors,a relatively long time is needed,since the distance to the beacon is measured by transmitting time of the ultrasonic signal.The measurement time does not cause a high error rate when the mobile robot moves slowly.However,with an increase of the mobile robot’s speed,the localization error becomes too high to use for accurate mobile robot navigation.Therefore,in this research into high speed mobile robot operations,instead of using two active beacons for localization,an active beacon and dual compass are utilized to localize the mobile robot.This new approach resolves the high localization error caused by the speed of the mobile robot.The performance of the precise localization algorithm is verified by comparing it to the conventional method through real-world experiments.展开更多
In developing countries, the emigration from rural territories to urban areas has brought about some negative impacts strictly associated to a lack of services a drop of ecological sustainability and environment prote...In developing countries, the emigration from rural territories to urban areas has brought about some negative impacts strictly associated to a lack of services a drop of ecological sustainability and environment protection with the consequence to worsen the marginalization of these territories. In the world, more than 50% of poverty is located in rural areas and the most incidence of it is in Sub-Saharan African countries; in Latin American nations, instead, the most percentage of poverty is located in urban areas. The aim of this research was to estimate, by a multiple regression model, in 46 countries of Africa and in 23 nations of Souther-Central America, which socio-economic variables were able to play a fundamental role on the rural population and on the development of rural areas in 2000 and 2010 using some statistical data published in the FAO Statistic book. In analysed African countries there has been an increase of people living in the rural space and a growth by 21% of agricultural Gross Domestic Product （GDP）. In Southern and Central American nations, there has been a meaningful emigration from rural territories due to an expansion of commercial flows and per capita income in rich areas, thus people have decided to move from the rural territories to the urban territories, worsening the poverty and living conditions in the countryside.展开更多
Multilingual Education Programs Regulation was adopted and the implementation of bilingual educational reform started in Georgia in 2010. The paper presents research results on readiness of non-Georgian schools to imp...Multilingual Education Programs Regulation was adopted and the implementation of bilingual educational reform started in Georgia in 2010. The paper presents research results on readiness of non-Georgian schools to implement multilingual educational programs effectively. The research studied the important factors influencing the effectiveness of bilingual educational programs, specifically （1） type of program, （2） human resources of schools and teachers professional development, （3） bilingual education as shared vision for all school stakeholders, and （4） community and parental involvement in designing and implementation of bilingual educational programs. The following research methods were used during the research： （1） quantitative and qualitative content analysis of bilingual educational programs of 26 non-Georgian schools of Kvemo Kartli and Samtskhe-Javakheti regions of Georgia, （2） quantitative survey of non-Georgian school principals through questionnaires, and （3） quantitative survey of non-Georgian schools＇ teachers of different subjective groups through questionnaire. The study revealed that schools are implementing mostly ＂weak＂ bilingual educational programs. The schools implementing bilingual educational programs do not have sufficient human resources, bilingual education is not a shared vision for all school stakeholders and parents and community are not actively involved in designing and implementation of the programs.展开更多
Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may le...Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may lead to a better understanding of business. However, it is becoming more and more difficult to measure and analyze these indicators since the fast growing number of performance indicators and the complex relationships between them The existing categories failed to reflect these changes in an adequate way, and the quantitative analysis methods for identifying the characters of those pefformance indicators are still worthy of investigation. The main objective of this paper is to propose a practical methodology for managing and analyzing performance indicators in enterprises, which focuses on building up a performance indicator system and discovering the characters of those performance indicators by applying complex network methods. The empirical results of a telecommunieation enterprise show that the proposed method can be effective in understanding the correlations between performance indicators.展开更多
This paper seeks to investigate the presence of accounting among petty traders in Ghana. The methodology applied was the mixed method under the multiple methods choices. Both qualitative and quantitative techniques we...This paper seeks to investigate the presence of accounting among petty traders in Ghana. The methodology applied was the mixed method under the multiple methods choices. Both qualitative and quantitative techniques were used. The findings were that formal education is not a pre-requisite requirement to the operations of a petty trading business. However, the study revealed the presence of accounting in petty trading; thus confirming the assumption that accounting is a universal good and is present in the petty trading business. Findings on the three major factors that influenced the present or absent of accounting among petty traders revealed that： there were no state institutions or pressure groups in Ghana to influence or oblige private entrepreneurs （petty traders） to prepare financial statements; the literacy of the petty trader though was found to be a necessary factor, it was not sufficient to explain the accountancy presence or absence in the traders＇ businesses. The usefulness of the accounting information to the petty trader influenced the presence of accounting in the traders＇ business. Finally, the level of trust - social capital in the community, and its influence on the presence of accounting, was relatively insignificant in the context of urban Ghana. No study of this kind has been conducted in the field of accounting presence or absence in Ghana.展开更多
Trace element analysis on hair samples has been widely used to assess wildlife and human exposure to different contaminants present in the environment or at the workplace. Pollutants due to the presence of toxic metal...Trace element analysis on hair samples has been widely used to assess wildlife and human exposure to different contaminants present in the environment or at the workplace. Pollutants due to the presence of toxic metals in environment not only enter the body by breading, water, and foodstuff accumulates in hair, but they could be adsorbed directly on the hair from environment. In order to remove adsorbed elements and thus determine the internally bound elements correctly, hair sample must be washed. In the present work, we propose uncertainty estimation for the analytical results that are obtained from determination of cadmium, lead, copper, iron, manganese and nickel in human hair by flame and electrothermal atomic absorption spectrometry （FAAS and ETAAS）. To estimate the uncertainty of analytical result obtained, two types of bias are calculated in the assessment of trueness： a proportional bias and a constant bias. Nested design was applied for calculating proportional bias and Youden method to calculate the constant bias. The results we obtained for proportional bias are calculated from spiked samples. In this case, the concentration found is plotted against the concentration added and the slop of standard addition curve is an estimate of the method recovery. Estimated method of average recovery in human hair is： （1.019 ±0.026）, （0.918 ±0.014）, （1.073±0.016）, （1.0597± 0.017）, （1.073± 0.020） and （0.934± 0.117） for Cd, Pb, Mn, Ni, Fe and Cu respectively.展开更多
文摘The panel dataset which covered the socio-economic data of 31 provinces （municipalities and autonomous region） in China from 2000-2007 was used to do empirical analysis on the effect of abolishing agricultural taxes on farmers＇ income by referring to the fixed effect estimation method. It found that the abolition of agricultural taxes increased farmer＇s net income per capita by 2%. Combining with the results of empirical analysis, related policy suggestions were put forward to increase farmers＇ income.
基金Project(60234030) supported by the National Natural Science Foundation of China
文摘A dead reckoning system for a wheeled mobile robot was designed, and the method for robot’s pose estimation in the 3D environments was presented on the basis of its rigid-body kinematic equations. After analyzing the locomotion architecture of mobile robot and the principle of proprioceptive sensors, the kinematics model of mobile robot was built to realize the relative localization. Considering that the research on dead reckoning of mobile robot was confined to the 2 dimensional planes, the locomotion of mobile robot in the 3 coordinate axis direction was thought over in order to estimate its pose on uneven terrain. Because the computing method in a plane is rather mature, the calculation in height direction is emphatically represented as a key issue. With experimental results obtained by simulation program and robot platform, the position of mobile robot can be reliably estimated and the localization precision can be effectively improved, so the effectiveness of this dead reckoning system is demonstrated.
文摘The method of error correction is one of key techniques of parallel robot. A new method of end error correction of 6-HTRT parallel robot is presented for engineering and researching on correlative theory of 6-HTRT parallel robot. The method need calculate many kinematics equations of parallel robot such as position back solution, velocity Jacobin, position forward solution and error Jacobin. New methods presented for solving these questions are simpler and fitter for programming and calculating, because former methods are too complex to use in engineering. These questions may be solved by iterative method of numerical value which has fast velocity of calculating. These new methods may be used in other mechanism of parallel robot too, and so have wider using value. The experimental results demonstrate that the system may satisfy entirely high technical request and fit for engineering in new measures.
基金supported by the MKE(The Ministry of Knowledge Economy),Korea,under the ITRC(Information Technology Research Center)support program supervised by the NIPA(National IT Industry Promotion Agency)(NIPA-2011-C1090-1121-0010)
文摘This paper proposes a precise localization algorithm for a quickly moving mobile robot.In order to localize a mobile robot with active beacon sensors,a relatively long time is needed,since the distance to the beacon is measured by transmitting time of the ultrasonic signal.The measurement time does not cause a high error rate when the mobile robot moves slowly.However,with an increase of the mobile robot’s speed,the localization error becomes too high to use for accurate mobile robot navigation.Therefore,in this research into high speed mobile robot operations,instead of using two active beacons for localization,an active beacon and dual compass are utilized to localize the mobile robot.This new approach resolves the high localization error caused by the speed of the mobile robot.The performance of the precise localization algorithm is verified by comparing it to the conventional method through real-world experiments.
文摘In developing countries, the emigration from rural territories to urban areas has brought about some negative impacts strictly associated to a lack of services a drop of ecological sustainability and environment protection with the consequence to worsen the marginalization of these territories. In the world, more than 50% of poverty is located in rural areas and the most incidence of it is in Sub-Saharan African countries; in Latin American nations, instead, the most percentage of poverty is located in urban areas. The aim of this research was to estimate, by a multiple regression model, in 46 countries of Africa and in 23 nations of Souther-Central America, which socio-economic variables were able to play a fundamental role on the rural population and on the development of rural areas in 2000 and 2010 using some statistical data published in the FAO Statistic book. In analysed African countries there has been an increase of people living in the rural space and a growth by 21% of agricultural Gross Domestic Product （GDP）. In Southern and Central American nations, there has been a meaningful emigration from rural territories due to an expansion of commercial flows and per capita income in rich areas, thus people have decided to move from the rural territories to the urban territories, worsening the poverty and living conditions in the countryside.
文摘Multilingual Education Programs Regulation was adopted and the implementation of bilingual educational reform started in Georgia in 2010. The paper presents research results on readiness of non-Georgian schools to implement multilingual educational programs effectively. The research studied the important factors influencing the effectiveness of bilingual educational programs, specifically （1） type of program, （2） human resources of schools and teachers professional development, （3） bilingual education as shared vision for all school stakeholders, and （4） community and parental involvement in designing and implementation of bilingual educational programs. The following research methods were used during the research： （1） quantitative and qualitative content analysis of bilingual educational programs of 26 non-Georgian schools of Kvemo Kartli and Samtskhe-Javakheti regions of Georgia, （2） quantitative survey of non-Georgian school principals through questionnaires, and （3） quantitative survey of non-Georgian schools＇ teachers of different subjective groups through questionnaire. The study revealed that schools are implementing mostly ＂weak＂ bilingual educational programs. The schools implementing bilingual educational programs do not have sufficient human resources, bilingual education is not a shared vision for all school stakeholders and parents and community are not actively involved in designing and implementation of the programs.
基金This work was partially supported by the Project of National Natural Science Foundation for Distinguished Young Scholars under Grants No.70901009,No.71202155，the Youth Research and Innovation Program in Beijing University of Posts and Telecommunications，the National Basic Research Program of China under Grant No.2012CB315805
文摘Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may lead to a better understanding of business. However, it is becoming more and more difficult to measure and analyze these indicators since the fast growing number of performance indicators and the complex relationships between them The existing categories failed to reflect these changes in an adequate way, and the quantitative analysis methods for identifying the characters of those pefformance indicators are still worthy of investigation. The main objective of this paper is to propose a practical methodology for managing and analyzing performance indicators in enterprises, which focuses on building up a performance indicator system and discovering the characters of those performance indicators by applying complex network methods. The empirical results of a telecommunieation enterprise show that the proposed method can be effective in understanding the correlations between performance indicators.
文摘This paper seeks to investigate the presence of accounting among petty traders in Ghana. The methodology applied was the mixed method under the multiple methods choices. Both qualitative and quantitative techniques were used. The findings were that formal education is not a pre-requisite requirement to the operations of a petty trading business. However, the study revealed the presence of accounting in petty trading; thus confirming the assumption that accounting is a universal good and is present in the petty trading business. Findings on the three major factors that influenced the present or absent of accounting among petty traders revealed that： there were no state institutions or pressure groups in Ghana to influence or oblige private entrepreneurs （petty traders） to prepare financial statements; the literacy of the petty trader though was found to be a necessary factor, it was not sufficient to explain the accountancy presence or absence in the traders＇ businesses. The usefulness of the accounting information to the petty trader influenced the presence of accounting in the traders＇ business. Finally, the level of trust - social capital in the community, and its influence on the presence of accounting, was relatively insignificant in the context of urban Ghana. No study of this kind has been conducted in the field of accounting presence or absence in Ghana.
文摘Trace element analysis on hair samples has been widely used to assess wildlife and human exposure to different contaminants present in the environment or at the workplace. Pollutants due to the presence of toxic metals in environment not only enter the body by breading, water, and foodstuff accumulates in hair, but they could be adsorbed directly on the hair from environment. In order to remove adsorbed elements and thus determine the internally bound elements correctly, hair sample must be washed. In the present work, we propose uncertainty estimation for the analytical results that are obtained from determination of cadmium, lead, copper, iron, manganese and nickel in human hair by flame and electrothermal atomic absorption spectrometry （FAAS and ETAAS）. To estimate the uncertainty of analytical result obtained, two types of bias are calculated in the assessment of trueness： a proportional bias and a constant bias. Nested design was applied for calculating proportional bias and Youden method to calculate the constant bias. The results we obtained for proportional bias are calculated from spiked samples. In this case, the concentration found is plotted against the concentration added and the slop of standard addition curve is an estimate of the method recovery. Estimated method of average recovery in human hair is： （1.019 ±0.026）, （0.918 ±0.014）, （1.073±0.016）, （1.0597± 0.017）, （1.073± 0.020） and （0.934± 0.117） for Cd, Pb, Mn, Ni, Fe and Cu respectively.
