An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information a...An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information and the benefits it engenders in the mining economy. Hence, it is important to create optimizing algorithms to reduce the errors of economic calculations. In this work, a logical mathematical algorithm that considers the important designing parameters and the mining economy is proposed. This algorithm creates an optimizing repetitive process among different designing constituents and directs them into the maximum amount of the mine economical parameters. This process will produce the highest amount of ores and the highest degree of safety. The modeling produces a new relation between the concept of the cutoff grade, mine designing, and mine planning, and it provides the maximum benefit by calculating the destination of the ores. The proposed algorithm is evaluated in a real case study. The results show that the net present value of the mine production is increased by 3% compared to previous methods of production design and UPL.展开更多
Varying-coefficient models are a useful extension of classical linear model. They are widely applied to economics, biomedicine, epidemiology, and so on. There are extensive studies on them in the latest three decade y...Varying-coefficient models are a useful extension of classical linear model. They are widely applied to economics, biomedicine, epidemiology, and so on. There are extensive studies on them in the latest three decade years. In this paper, many of models related to varying-coefficient models are gathered up. All kinds of the estimation procedures and theory of hypothesis test on the varying-coefficients model are summarized. Prom my opinion, some aspects waiting to study are proposed.展开更多
The evaluation system of R＆D project beforehand, in the course and afterwards embodies the principle and standard of the cycle economy, which can not only avoid the negative effects caused, by the utilization of the ...The evaluation system of R＆D project beforehand, in the course and afterwards embodies the principle and standard of the cycle economy, which can not only avoid the negative effects caused, by the utilization of the achievements of R＆D project in the industry but also point out the direction and criterion of R＆D activities for the enterprises, which also provides the ＂model＂ that can be used for reference for maintaining the durable competitiveness of the enterprises.展开更多
With the rapid development of economic globalization, foreign language talents who are cultivated by general foreign language teaching should meet the requirements of the international development strategy. Therefore,...With the rapid development of economic globalization, foreign language talents who are cultivated by general foreign language teaching should meet the requirements of the international development strategy. Therefore, it is of great importance to promote foreign language teaching quality. In this paper, we discuss how to fully utilize the English for Specific Purposes （ESP） theory to enhance professional foreign language teaching quality. ESP refers to a type of teaching concept or approach as the counterpart of English for General Purposes （EGP）, which contains a vast range of aspects. Particularly, we propose two English course design methods based on the ESP theory, that is, 1） language centered curriculum design, and 2） learning centered curriculum design. Finally, experimental results demonstrate that the proposed method can significantly improve teaching quality.展开更多
The management of municipal solid waste （MSW） is currently one of the major environmental concerns in Mexico. Therefore, municipalities must develop local programs for prevention and integrated management of MSW bas...The management of municipal solid waste （MSW） is currently one of the major environmental concerns in Mexico. Therefore, municipalities must develop local programs for prevention and integrated management of MSW based on the data of MSW generation; however, these are scarce and diffuse. It is known that the MSW generation is affected by many factors, including life level. Given the importance of having reliable data, the objective of this study was to determine the per capita MSW generation of a small urban locality in the state of Veracruz and test whether there were significant statistic differences of per capita M SW generation among the life levels. The households were randomly sampled according to the Mexican standard of reference and were classified as popular, middle and residential. The per capita MSW generation determined was 0.355 kg·inhab^-1.day^-1. This value was lower than the value estimated by the national reference, suggesting that it might be overestimated and consequently lead to errors in estimating installations costs for the MSW treatment. The result of the experimental design revealed that there were significant statistic differences in the per capita MSW generation among the three socioeconomic strata. This study will allow the municipality to establish better strategies within the municipal program and differential rate for the provision of public clean service and it also provides a solid basis for future research under similar conditions.展开更多
Nowadays, with the rapid development of the society and economy, the living standards of people increase rapidly. People are gradually pursuing green and environmental living concepts rather than the extensive type li...Nowadays, with the rapid development of the society and economy, the living standards of people increase rapidly. People are gradually pursuing green and environmental living concepts rather than the extensive type living modes. Due to the increase of people＇ s cognition of scientific development concept as well as the gradually increasing demands on residential interior design, the concept of green residence comes into people＇ s mind. As the development tendency of future interior design, green residence can be environmental-friendly and increase the greenery and comfort to the house, thus being more and more welcomed in the home market. This paper analyzes and explores some questions concerned during the green residential interior design by starting from the concept of green residential interior design.展开更多
With a sustained period of economic growth, rapidly growing populations and with more diversified economies Africa need sustainable development; hence the greater need for massive investments in energy. Sub-Saharan co...With a sustained period of economic growth, rapidly growing populations and with more diversified economies Africa need sustainable development; hence the greater need for massive investments in energy. Sub-Saharan countries such as Djibouti have the potential and ability to harness their natural ventilation as a passive cooling system for designing new houses. The rapid expansion of the Djibouti city is affecting negatively the environment and the safety and comfort of its inhabitants. Proper atmospheric urban planning and management are key to making cities environmentally friendly and sustainable. Based on energy consumption, climate conditions in Djibouti and numerical analysis using Computational Fluid Dynamics （CFD）, it is apparent that the natural ventilation creates a thermally comfortable indoor environment in buildings during the cool season of the year. Measured wind data from two measurement systems are presented and discussed. Statistical analyses, wind rose, Weibull distribution were carried out to understand the natural ventilation characteristic, which is used for evolving the basic criteria for economic viability of building in the semi-arid climate of Djibouti. The study found that it is possible to benefit from natural ventilation in buildings during the cool season of the year.展开更多
In recent years, with the development of social and economic ＂globalization＂, in China, the new knowledge economy society has been gradually formed. The old education system, teaching management, and many old teachi...In recent years, with the development of social and economic ＂globalization＂, in China, the new knowledge economy society has been gradually formed. The old education system, teaching management, and many old teaching methods and concepts are no longer adapted to the social development and needs. The world needs the new comprehensive quality talents. Developing high-quality and useful talents to serve the community is not only needed by both society and market, but also our most urgent and imperative task. As the art and design in colleges which is closely related to the socio-economic development, it is like a barometer of social economy, accurately reflecting the socio-economic dynamics and trends. To break the traditional concept, we must convert the concept of major-targeting to major-adapting, namely the coexisting of innovation education and adaption education, to meet the domestic demand for high-quality and high standards art and design talents to meet the increasing demand for talents.展开更多
文摘An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information and the benefits it engenders in the mining economy. Hence, it is important to create optimizing algorithms to reduce the errors of economic calculations. In this work, a logical mathematical algorithm that considers the important designing parameters and the mining economy is proposed. This algorithm creates an optimizing repetitive process among different designing constituents and directs them into the maximum amount of the mine economical parameters. This process will produce the highest amount of ores and the highest degree of safety. The modeling produces a new relation between the concept of the cutoff grade, mine designing, and mine planning, and it provides the maximum benefit by calculating the destination of the ores. The proposed algorithm is evaluated in a real case study. The results show that the net present value of the mine production is increased by 3% compared to previous methods of production design and UPL.
基金Foundation item： Supported by the National Natural Science Foundation of China（10501053） Acknowledgement I would like to thank Henan Society of Applied Statistics for which give me a chance to declare my opinion about the varying-coefficient model.
文摘Varying-coefficient models are a useful extension of classical linear model. They are widely applied to economics, biomedicine, epidemiology, and so on. There are extensive studies on them in the latest three decade years. In this paper, many of models related to varying-coefficient models are gathered up. All kinds of the estimation procedures and theory of hypothesis test on the varying-coefficients model are summarized. Prom my opinion, some aspects waiting to study are proposed.
文摘The evaluation system of R＆D project beforehand, in the course and afterwards embodies the principle and standard of the cycle economy, which can not only avoid the negative effects caused, by the utilization of the achievements of R＆D project in the industry but also point out the direction and criterion of R＆D activities for the enterprises, which also provides the ＂model＂ that can be used for reference for maintaining the durable competitiveness of the enterprises.
文摘With the rapid development of economic globalization, foreign language talents who are cultivated by general foreign language teaching should meet the requirements of the international development strategy. Therefore, it is of great importance to promote foreign language teaching quality. In this paper, we discuss how to fully utilize the English for Specific Purposes （ESP） theory to enhance professional foreign language teaching quality. ESP refers to a type of teaching concept or approach as the counterpart of English for General Purposes （EGP）, which contains a vast range of aspects. Particularly, we propose two English course design methods based on the ESP theory, that is, 1） language centered curriculum design, and 2） learning centered curriculum design. Finally, experimental results demonstrate that the proposed method can significantly improve teaching quality.
文摘The management of municipal solid waste （MSW） is currently one of the major environmental concerns in Mexico. Therefore, municipalities must develop local programs for prevention and integrated management of MSW based on the data of MSW generation; however, these are scarce and diffuse. It is known that the MSW generation is affected by many factors, including life level. Given the importance of having reliable data, the objective of this study was to determine the per capita MSW generation of a small urban locality in the state of Veracruz and test whether there were significant statistic differences of per capita M SW generation among the life levels. The households were randomly sampled according to the Mexican standard of reference and were classified as popular, middle and residential. The per capita MSW generation determined was 0.355 kg·inhab^-1.day^-1. This value was lower than the value estimated by the national reference, suggesting that it might be overestimated and consequently lead to errors in estimating installations costs for the MSW treatment. The result of the experimental design revealed that there were significant statistic differences in the per capita MSW generation among the three socioeconomic strata. This study will allow the municipality to establish better strategies within the municipal program and differential rate for the provision of public clean service and it also provides a solid basis for future research under similar conditions.
文摘Nowadays, with the rapid development of the society and economy, the living standards of people increase rapidly. People are gradually pursuing green and environmental living concepts rather than the extensive type living modes. Due to the increase of people＇ s cognition of scientific development concept as well as the gradually increasing demands on residential interior design, the concept of green residence comes into people＇ s mind. As the development tendency of future interior design, green residence can be environmental-friendly and increase the greenery and comfort to the house, thus being more and more welcomed in the home market. This paper analyzes and explores some questions concerned during the green residential interior design by starting from the concept of green residential interior design.
文摘With a sustained period of economic growth, rapidly growing populations and with more diversified economies Africa need sustainable development; hence the greater need for massive investments in energy. Sub-Saharan countries such as Djibouti have the potential and ability to harness their natural ventilation as a passive cooling system for designing new houses. The rapid expansion of the Djibouti city is affecting negatively the environment and the safety and comfort of its inhabitants. Proper atmospheric urban planning and management are key to making cities environmentally friendly and sustainable. Based on energy consumption, climate conditions in Djibouti and numerical analysis using Computational Fluid Dynamics （CFD）, it is apparent that the natural ventilation creates a thermally comfortable indoor environment in buildings during the cool season of the year. Measured wind data from two measurement systems are presented and discussed. Statistical analyses, wind rose, Weibull distribution were carried out to understand the natural ventilation characteristic, which is used for evolving the basic criteria for economic viability of building in the semi-arid climate of Djibouti. The study found that it is possible to benefit from natural ventilation in buildings during the cool season of the year.
文摘In recent years, with the development of social and economic ＂globalization＂, in China, the new knowledge economy society has been gradually formed. The old education system, teaching management, and many old teaching methods and concepts are no longer adapted to the social development and needs. The world needs the new comprehensive quality talents. Developing high-quality and useful talents to serve the community is not only needed by both society and market, but also our most urgent and imperative task. As the art and design in colleges which is closely related to the socio-economic development, it is like a barometer of social economy, accurately reflecting the socio-economic dynamics and trends. To break the traditional concept, we must convert the concept of major-targeting to major-adapting, namely the coexisting of innovation education and adaption education, to meet the domestic demand for high-quality and high standards art and design talents to meet the increasing demand for talents.
