Coffee is a significant industry, accounting for 3% of Vietnam’s GDP, with annual export turnover consistently exceeding USD 3 billion. Despite global economic challenges affecting purchasing power at various times, ...Coffee is a significant industry, accounting for 3% of Vietnam’s GDP, with annual export turnover consistently exceeding USD 3 billion. Despite global economic challenges affecting purchasing power at various times, Vietnam’s coffee exports in December 2023 continued to surge, reaching the highest level in the past 9 months at 190,000 tons, a 59.3% increase compared to November 2023, but still a slight 3.5% decrease from the same period last year. The export turnover reached USD 538 million, a 51% increase from November 2023 and a 26.4% increase from the same period last year. Therefore, forecasting the coffee export volume holds significant importance for coffee producers nationwide. This research employs the Box-Jenkins method to construct an ARIMA model for forecasting Vietnam’s coffee export volume based on annual data published by the General Statistics Office. Results indicate that among the models considered, the ARIMA(1, 1, 2) model is the most suitable. The study also provides short-term forecasts for Vietnam’s coffee export volume. However, the current model is limited to forecasting and is not yet optimized, as the assumed linearity in the model is a simplification.展开更多
建筑信息建模(Building Information Modeling,BIM)技术,主要是通过数字信息仿真的方式来建立建筑模型,以此来还原其真实的信息,供相关部门参考。其具备信息完备性、关联性、一致性、可视化性、协调性、模拟性、优化性以及可出图性等特...建筑信息建模(Building Information Modeling,BIM)技术,主要是通过数字信息仿真的方式来建立建筑模型,以此来还原其真实的信息,供相关部门参考。其具备信息完备性、关联性、一致性、可视化性、协调性、模拟性、优化性以及可出图性等特点,被广泛地应用在复杂型建筑、水电工程施工总布置、古典建筑中。近几年,随着BIM技术的不断完善,其被广泛地应用在轻型装配式的建造中,并且取得了显著应用效果。基于此,对建筑信息建模技术在轻型装配式建造过程中的应用进行研究,以此来为建筑信息建模技术的应用以及相关部门提供参考。展开更多
Economic globalization has promoted the formation of global production network, and correspondingly the high quality environmental factors are reconfigured behind the physical commodities exchange. Export trade not on...Economic globalization has promoted the formation of global production network, and correspondingly the high quality environmental factors are reconfigured behind the physical commodities exchange. Export trade not only drives China's economic growth, promotes industrial upgrading and technological progress, but also may have a negative impact on the environment. After reviewing and summarizing the existing relevant literatures, the paper collects the required statistic data from 2003 to 2006 and uses the panel data model to measure the environmental effects of export trade in the Yangtze River Delta. The results show that the export trade of Yangtze River Delta has a negative impact on the environment. When the variables of economic scale, economic structure are fixed, with the export trade growth of 1%, the industrial sulfur dioxide emission and industrial waste water emission will increase by 0.12% and 0.23% respectively. So we must pay serious attention to the negative effects, and promote regional sus tainable development rapidly through adjusting the export structure and strengthening environmental regulations.展开更多
文摘Coffee is a significant industry, accounting for 3% of Vietnam’s GDP, with annual export turnover consistently exceeding USD 3 billion. Despite global economic challenges affecting purchasing power at various times, Vietnam’s coffee exports in December 2023 continued to surge, reaching the highest level in the past 9 months at 190,000 tons, a 59.3% increase compared to November 2023, but still a slight 3.5% decrease from the same period last year. The export turnover reached USD 538 million, a 51% increase from November 2023 and a 26.4% increase from the same period last year. Therefore, forecasting the coffee export volume holds significant importance for coffee producers nationwide. This research employs the Box-Jenkins method to construct an ARIMA model for forecasting Vietnam’s coffee export volume based on annual data published by the General Statistics Office. Results indicate that among the models considered, the ARIMA(1, 1, 2) model is the most suitable. The study also provides short-term forecasts for Vietnam’s coffee export volume. However, the current model is limited to forecasting and is not yet optimized, as the assumed linearity in the model is a simplification.
文摘建筑信息建模(Building Information Modeling,BIM)技术,主要是通过数字信息仿真的方式来建立建筑模型,以此来还原其真实的信息,供相关部门参考。其具备信息完备性、关联性、一致性、可视化性、协调性、模拟性、优化性以及可出图性等特点,被广泛地应用在复杂型建筑、水电工程施工总布置、古典建筑中。近几年,随着BIM技术的不断完善,其被广泛地应用在轻型装配式的建造中,并且取得了显著应用效果。基于此,对建筑信息建模技术在轻型装配式建造过程中的应用进行研究,以此来为建筑信息建模技术的应用以及相关部门提供参考。
文摘Economic globalization has promoted the formation of global production network, and correspondingly the high quality environmental factors are reconfigured behind the physical commodities exchange. Export trade not only drives China's economic growth, promotes industrial upgrading and technological progress, but also may have a negative impact on the environment. After reviewing and summarizing the existing relevant literatures, the paper collects the required statistic data from 2003 to 2006 and uses the panel data model to measure the environmental effects of export trade in the Yangtze River Delta. The results show that the export trade of Yangtze River Delta has a negative impact on the environment. When the variables of economic scale, economic structure are fixed, with the export trade growth of 1%, the industrial sulfur dioxide emission and industrial waste water emission will increase by 0.12% and 0.23% respectively. So we must pay serious attention to the negative effects, and promote regional sus tainable development rapidly through adjusting the export structure and strengthening environmental regulations.
