Mapping in the dynamic environment is an important task for autonomous mobile robots due to the unavoidable changes in the workspace. In this paper, we propose a framework for RGBD SLAM in low dynamic environment, whi...Mapping in the dynamic environment is an important task for autonomous mobile robots due to the unavoidable changes in the workspace. In this paper, we propose a framework for RGBD SLAM in low dynamic environment, which can maintain a map keeping track of the latest environment. The main model describing the environment is a multi-session pose graph, which evolves over the multiple visits of the robot. The poses in the graph will be pruned when the 3D point scans corresponding to those poses are out of date. When the robot explores the new areas, its poses will be added to the graph. Thus the scans kept in the current graph will always give a map of the latest environment. The changes of the environment are detected by out-of-dated scans identification module through analyzing scans collected at different sessions. Besides, a redundant scans identification module is employed to further reduce the poses with redundant scans in order to keep the total number of poses in the graph with respect to the size of environment. In the experiments, the framework is first tuned and tested on data acquired by a Kinect from laboratory environment. Then the framework is applied to external dataset acquired by a Kinect II from a workspace of an industrial robot in another country, which is blind to the development phase, for further validation of the performance. After this two-step evaluation, the proposed framework is considered to be able to manage the map in date in dynamic or static environment with a noncumulative complexity and acceptable error level.展开更多
The hypothesis ＂happy productive worker＂ states that happy employees, whose needs are satisfied in their workplace, have greater performance than unhappy employees. Therefore, the purpose of this research is to exam...The hypothesis ＂happy productive worker＂ states that happy employees, whose needs are satisfied in their workplace, have greater performance than unhappy employees. Therefore, the purpose of this research is to examine empirically the effects that job satisfaction and well-being at work generate on the individual job performance, investigating the moderating role that the components of the organizational structure play in this relationship. To achieve the main objective, some secondary objectives were proposed： （1） test the predictive effect of well-being, satisfaction, personal, and professional variables on individual performance; and （2） test the moderating effect of the components of the organizational structure in the relationship among well-being, satisfaction, and individual job performance. This research originates of a consolidated statement for the business society, but very few empirical studies. This way, the hypothesis consisted in the components of the organizational structure will positively enhance the relationship among well-being at work, job satisfaction, and individual job performance. The final sample consisted of 134 participants, of a clinical laboratory and of federal court of justice. For the development of the questionnaire, four instruments were used; one for each construct. The proposal has four relationship variables and the statistical procedure used to test this hypothesis was multiple linear regressions. Considering the hypothetical theoretical model presented, personal and professional variables are predictors of job performance; thus, these variables were also included as independent variables. The results of the regression model showed that the variables ＂age＂, ＂well-being at work＂, ＂job satisfaction＂, and ＂components of organizational structure＂ are responsible for explaining 64% of the variance of the variable criteria and individual job performance The moderating role of the variable ＂components of organizational structure＂ was also observed, because its inclusion increased the explained variance of the dependent variable. After all the discussions developed, the two main contributions appear： （1） the predictive effect of well-being at work in relation to performance and （2） identifying the moderating effect of the components of the organizational structure.展开更多
The design and development Web 2.0-based education management system will satisfy with the school education management of informationization, scientific and modernized request, the auxiliary education superintendent c...The design and development Web 2.0-based education management system will satisfy with the school education management of informationization, scientific and modernized request, the auxiliary education superintendent carries on the correct decision-making, enhance the education management working efficiency. This system has used the quite mature development technology at present, the function of realizes is more perfect, usable; The man-machine interaction is friendly and operate easily. Its application, enhanced the administrator and teacher＇s working efficiency greatly, reduces the working strength, simultaneously has also provided the better education condition for the student. With the rapid development of network,, education management system will be more widespread in the education of education application, it will create a new situation of the education management, bring a brighter prospect of the application.展开更多
The popular singer and songwriter Bruce Springsteen is a product of the working-class family, and his songs often creatively capture not only working-class life but also workers＇ alienation from their labor. In an un...The popular singer and songwriter Bruce Springsteen is a product of the working-class family, and his songs often creatively capture not only working-class life but also workers＇ alienation from their labor. In an unsystematic way, Springsteen＇s lyrics portray how modem workers are alienated from the products of their labor, the process of working, other workers, and ultimately, from themselves. Although Springsteen primarily has blue-collar, industrial workers in mind, his thoughts on the alienation of labor continue to have relevance for workers in the American consumer society and in the contemporary global economy as well.展开更多
It has been proven that longwall faces can be moved safely and efficiently. However,abutment pressures and poor ground control conditions can halt operations and be hazardous to coal miners. Recently at a mine in Sout...It has been proven that longwall faces can be moved safely and efficiently. However,abutment pressures and poor ground control conditions can halt operations and be hazardous to coal miners. Recently at a mine in Southwestern Pennsylvania,roof material collapsed above shields that created two large voids and caused major challenges for shield recovery. A unique,engineering solution was developed that utilized a modified concrete material to fill the voids,creating stability in the affected area. The many phases of this project included the construction phase,void pumping,cutting out,and bolting of the concrete material. This project eliminated the hazards associated with bolting the recovery face and removing shields in adverse conditions,making it possible for the mine operator to safely complete the longwall move.展开更多
Beginning with the analysis of the behavior of natural ants, this paper illuminates the principle and method that, by adopting image texture energy as pheromone and finding their way on the track of the pheromone, art...Beginning with the analysis of the behavior of natural ants, this paper illuminates the principle and method that, by adopting image texture energy as pheromone and finding their way on the track of the pheromone, artificial ants have the ability to identify and remember through similar measurement of pheromone. Based on the quantity of experiments, this paper analyzes some factors that influence the ability of artificial ants and draws some conclusions about the law of ant perception.展开更多
This article focuses on the development and content of an empowerment programme for staff members at a service centre. An empowerment programme for staffworking with retired volunteers can bring about better knowledge...This article focuses on the development and content of an empowerment programme for staff members at a service centre. An empowerment programme for staffworking with retired volunteers can bring about better knowledge and understanding of elderly persons. This can lead to the target group being ideally managed and understood. The personnel work and interact on a daily basis with retired volunteers. The empowering programme includes matters such as the life circumstances of retired volunteers, the value that retired volunteers have, for the functioning of the service centre, the reasons for utilising retired volunteers, what volunteers expect of staff members, and the motivation of retired volunteers to be involved in the various activities of a service centre for the elderly to benefit the staff members themselves. By presenting and evaluating the empowerment programme, staff members will be able to become functional units in utilising elderly volunteers to the fullest possible in order to benefit the staff members, the retired volunteers, and the community at large.展开更多
This paper studies the Myanmar migrant workers in Sidhiphatra Cold Storage Factory, Songkhla Province. This factory employs just over 2,000 Myanmar migrant workers. The authors study their ＂everyday life practices＂ ...This paper studies the Myanmar migrant workers in Sidhiphatra Cold Storage Factory, Songkhla Province. This factory employs just over 2,000 Myanmar migrant workers. The authors study their ＂everyday life practices＂ as expressed in relationships among various groups, such as relationships between the Myanmar migrant workers and the factory, and the relationships between the Myanmar migrant workers and the Thai people of the surrounding communities. In analyzing these relationships and negotiations, the authors borrow the concept of ＂tactics of everyday life＂ from Michel de Certeau as a framework for analysis. The authors＇ analyses are based on in-depth interviews, non-participant observations, and focus-group discussions that collectively explored the tactics, in de Certeau＇s sense, that the Myanmar migrant workers used in negotiating their relationships with the factory and with the various communities in the area. The results indicate that Myanmar migrant workers negotiate their relationship with the factory by expressing themselves as selected workers, good workers, and being obedient to the factory＇s rules. The conflicts caused by Myanmar and Cambodian migrant workers are negotiated. Besides, Myanmar migrant workers also negotiate their relationship with the Thai people living in the surrounding communities. Their approach is showing that they are part of the communities by participating in the activities with the aim to gain acceptance of the Thai people in the surrounding communities.展开更多
基金This work is supported by the National Natural Science Foundation of China （Grant No. NSFC： 61473258, U 1509210）, and the Joint Centre for Robotics Research （JCRR） between Zhejiang University and the University of Technology, Sydney.
文摘Mapping in the dynamic environment is an important task for autonomous mobile robots due to the unavoidable changes in the workspace. In this paper, we propose a framework for RGBD SLAM in low dynamic environment, which can maintain a map keeping track of the latest environment. The main model describing the environment is a multi-session pose graph, which evolves over the multiple visits of the robot. The poses in the graph will be pruned when the 3D point scans corresponding to those poses are out of date. When the robot explores the new areas, its poses will be added to the graph. Thus the scans kept in the current graph will always give a map of the latest environment. The changes of the environment are detected by out-of-dated scans identification module through analyzing scans collected at different sessions. Besides, a redundant scans identification module is employed to further reduce the poses with redundant scans in order to keep the total number of poses in the graph with respect to the size of environment. In the experiments, the framework is first tuned and tested on data acquired by a Kinect from laboratory environment. Then the framework is applied to external dataset acquired by a Kinect II from a workspace of an industrial robot in another country, which is blind to the development phase, for further validation of the performance. After this two-step evaluation, the proposed framework is considered to be able to manage the map in date in dynamic or static environment with a noncumulative complexity and acceptable error level.
文摘The hypothesis ＂happy productive worker＂ states that happy employees, whose needs are satisfied in their workplace, have greater performance than unhappy employees. Therefore, the purpose of this research is to examine empirically the effects that job satisfaction and well-being at work generate on the individual job performance, investigating the moderating role that the components of the organizational structure play in this relationship. To achieve the main objective, some secondary objectives were proposed： （1） test the predictive effect of well-being, satisfaction, personal, and professional variables on individual performance; and （2） test the moderating effect of the components of the organizational structure in the relationship among well-being, satisfaction, and individual job performance. This research originates of a consolidated statement for the business society, but very few empirical studies. This way, the hypothesis consisted in the components of the organizational structure will positively enhance the relationship among well-being at work, job satisfaction, and individual job performance. The final sample consisted of 134 participants, of a clinical laboratory and of federal court of justice. For the development of the questionnaire, four instruments were used; one for each construct. The proposal has four relationship variables and the statistical procedure used to test this hypothesis was multiple linear regressions. Considering the hypothetical theoretical model presented, personal and professional variables are predictors of job performance; thus, these variables were also included as independent variables. The results of the regression model showed that the variables ＂age＂, ＂well-being at work＂, ＂job satisfaction＂, and ＂components of organizational structure＂ are responsible for explaining 64% of the variance of the variable criteria and individual job performance The moderating role of the variable ＂components of organizational structure＂ was also observed, because its inclusion increased the explained variance of the dependent variable. After all the discussions developed, the two main contributions appear： （1） the predictive effect of well-being at work in relation to performance and （2） identifying the moderating effect of the components of the organizational structure.
文摘The design and development Web 2.0-based education management system will satisfy with the school education management of informationization, scientific and modernized request, the auxiliary education superintendent carries on the correct decision-making, enhance the education management working efficiency. This system has used the quite mature development technology at present, the function of realizes is more perfect, usable; The man-machine interaction is friendly and operate easily. Its application, enhanced the administrator and teacher＇s working efficiency greatly, reduces the working strength, simultaneously has also provided the better education condition for the student. With the rapid development of network,, education management system will be more widespread in the education of education application, it will create a new situation of the education management, bring a brighter prospect of the application.
文摘The popular singer and songwriter Bruce Springsteen is a product of the working-class family, and his songs often creatively capture not only working-class life but also workers＇ alienation from their labor. In an unsystematic way, Springsteen＇s lyrics portray how modem workers are alienated from the products of their labor, the process of working, other workers, and ultimately, from themselves. Although Springsteen primarily has blue-collar, industrial workers in mind, his thoughts on the alienation of labor continue to have relevance for workers in the American consumer society and in the contemporary global economy as well.
文摘It has been proven that longwall faces can be moved safely and efficiently. However,abutment pressures and poor ground control conditions can halt operations and be hazardous to coal miners. Recently at a mine in Southwestern Pennsylvania,roof material collapsed above shields that created two large voids and caused major challenges for shield recovery. A unique,engineering solution was developed that utilized a modified concrete material to fill the voids,creating stability in the affected area. The many phases of this project included the construction phase,void pumping,cutting out,and bolting of the concrete material. This project eliminated the hazards associated with bolting the recovery face and removing shields in adverse conditions,making it possible for the mine operator to safely complete the longwall move.
基金Founded by the National Science Foundation of China (No.42071094) .
文摘Beginning with the analysis of the behavior of natural ants, this paper illuminates the principle and method that, by adopting image texture energy as pheromone and finding their way on the track of the pheromone, artificial ants have the ability to identify and remember through similar measurement of pheromone. Based on the quantity of experiments, this paper analyzes some factors that influence the ability of artificial ants and draws some conclusions about the law of ant perception.
文摘This article focuses on the development and content of an empowerment programme for staff members at a service centre. An empowerment programme for staffworking with retired volunteers can bring about better knowledge and understanding of elderly persons. This can lead to the target group being ideally managed and understood. The personnel work and interact on a daily basis with retired volunteers. The empowering programme includes matters such as the life circumstances of retired volunteers, the value that retired volunteers have, for the functioning of the service centre, the reasons for utilising retired volunteers, what volunteers expect of staff members, and the motivation of retired volunteers to be involved in the various activities of a service centre for the elderly to benefit the staff members themselves. By presenting and evaluating the empowerment programme, staff members will be able to become functional units in utilising elderly volunteers to the fullest possible in order to benefit the staff members, the retired volunteers, and the community at large.
文摘This paper studies the Myanmar migrant workers in Sidhiphatra Cold Storage Factory, Songkhla Province. This factory employs just over 2,000 Myanmar migrant workers. The authors study their ＂everyday life practices＂ as expressed in relationships among various groups, such as relationships between the Myanmar migrant workers and the factory, and the relationships between the Myanmar migrant workers and the Thai people of the surrounding communities. In analyzing these relationships and negotiations, the authors borrow the concept of ＂tactics of everyday life＂ from Michel de Certeau as a framework for analysis. The authors＇ analyses are based on in-depth interviews, non-participant observations, and focus-group discussions that collectively explored the tactics, in de Certeau＇s sense, that the Myanmar migrant workers used in negotiating their relationships with the factory and with the various communities in the area. The results indicate that Myanmar migrant workers negotiate their relationship with the factory by expressing themselves as selected workers, good workers, and being obedient to the factory＇s rules. The conflicts caused by Myanmar and Cambodian migrant workers are negotiated. Besides, Myanmar migrant workers also negotiate their relationship with the Thai people living in the surrounding communities. Their approach is showing that they are part of the communities by participating in the activities with the aim to gain acceptance of the Thai people in the surrounding communities.
