Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed c...Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed countries, with a population unevenly distributed across numerous islands varying greatly in size and population density. This study provides an in-depth analysis of the unique waste management practices across different regions of Maldives in relation to its natural and socioeconomic context. Data shows Maldives has one of the highest population density and per capita waste generation among SIDS, despite its small land area and medium GDP per capita. Large disparities exist between the densely populated capital Male’ with only 5.8 km2 area generating 63% of waste and the ~194 scattered outer islands with ad hoc waste management practices. Given Male’s dense population and high calorific waste, incineration could generate up to ~30 GW/a energy and even increase Maldives’ renewable energy supply by 200%. In contrast, decentralized anaerobic digestion presents an optimal solution for outer islands to reduce waste volume while providing over 40%–100% energy supply for daily cooking in local families. This timely study delivers valuable insights into designing context-specific waste-to-energy systems and integrated waste policies tailored to Maldives’ distinct regions. The framework presented can also guide other SIDS facing similar challenges as Maldives in establishing sustainable, ecologically sound waste management strategies.展开更多
Modern hydrobiology,mainly,is based on conception,which may be named Conception of unicity of ecosystem stable state(CUESS):Mature ecosystems are stable and in dynamic equilibrium.Ecosystem state fluctuates around
The Chinese government set up the State Development Bank against the background of the Chinese economic system being transformed from planned to market. In May 1995, the State Development Investment Corporation was es...The Chinese government set up the State Development Bank against the background of the Chinese economic system being transformed from planned to market. In May 1995, the State Development Investment Corporation was established. Does this mean that China’s investment system reform is advancing at a much展开更多
Economic growth and environmental "friendliness" are the dual missions of China's grand western development. In the past eight years,China has seen the gap between eastern and western regions still widen...Economic growth and environmental "friendliness" are the dual missions of China's grand western development. In the past eight years,China has seen the gap between eastern and western regions still widening while also taking on the arduous task of protecting nature,ecology and environment in the western region. How has western development fared in the past eight years? What difficulties and challenges are being encountered? The development of the western region poses the single greatest difficulty facing China's regional economic development,but how can we advance along a "sound and fast" development path? The establishment of economic zones in Chengdu and Chongqing,Guanzhong and North Bay has opened up new possibilities and expectations for western China's economic development.展开更多
The establishment of the State Power Grid Development Corp Ltd(SPG) was officially announced on June 18, marking the government’s determination to form a nationwide united power network to make the best of power gene...The establishment of the State Power Grid Development Corp Ltd(SPG) was officially announced on June 18, marking the government’s determination to form a nationwide united power network to make the best of power generating capability. The State-owned corporation, with 2.5 billion yuan ($301 million) worth of operating capital raised by the government, will be responsible for investment. construction and management of the power transmission and substation projects involved in the construction of the Three Gorges Project.展开更多
Based on the review of the papers and other related material submitted to the conference, the status quo and developmental trends of geocryology is briefly discussed.
Language acquisition is a system with four components： language development, academic development, cognitive development and sociocultural development. Based on this theory, Chinese students in the United States are ...Language acquisition is a system with four components： language development, academic development, cognitive development and sociocultural development. Based on this theory, Chinese students in the United States are studied from three perspectives： linguistically, culturally, and social psychologically. It indicated that, to help Chinese students develop their English performance and cultural appreciation in this diverse world, the profession of English teaching in China should cover a variety of domains, including linguistic, cultural and psychological input. Both American and Chinese education can benefit from this special group of Chinese students if they can be better understood, and used as a bridge between China and U. S. cultural and academic exchange. In the meantime, the mirror held up to the Chinese students in these perspectives reflects not only who they are but also who they can become.展开更多
Since the founding of New China in 1949, according to the Constitution of the People＇s Republic of China, the central government has made it a basic state policy to help ethnic minorities-inhabited border areas with ...Since the founding of New China in 1949, according to the Constitution of the People＇s Republic of China, the central government has made it a basic state policy to help ethnic minorities-inhabited border areas with their political, economic and cultural development, and to lead all the ethnic groups of China onto the road to common prosperity.展开更多
Computer science and technology play an important role in people’s lives and work,especially in the era of big data.The application of computer science and technology is conducive to improving people’s production an...Computer science and technology play an important role in people’s lives and work,especially in the era of big data.The application of computer science and technology is conducive to improving people’s production and living standards and provides a strong impetus for China’s social and economic development.Therefore,this paper analyzes the application of computer science and technology in the context of big data and puts forward new trends and requirements for its future development,aiming to provide some references for the computer science and technology industry.展开更多
Complementarities between wind and wave energies have many signifcant advantages that are unavailable with the sole deployment of either.Using all available wind speed,signifcant wave height,and wave period buoy obser...Complementarities between wind and wave energies have many signifcant advantages that are unavailable with the sole deployment of either.Using all available wind speed,signifcant wave height,and wave period buoy observations over a 10-year period(i.e.,2009–2019),colocated wind and wave energy resources are estimated.Although buoy records are imper-fect,results show that the inner Caribbean Sea(CS)under the infuence of the Caribbean low-level jet has the highest wind energy resource at~1500 W/m^(2),followed by the outer CS at~600 W/m^(2) and Atlantic Ocean(AO)at~550–600 W/m^(2) at a 100 m height.Wave energy was most abundant in the AO at 14 kW/m,followed by the inner CS at 13 kW/m and outer CS at 5 kW/m.The average and dominant wave energies can reach a maximum of 10 and 14 kW/m,respectively.Asymmetry between wind and wave energy resources is observed in the AO,where wave energy is higher than the low wind speed/energy would suggest.Swell is responsible for this discrepancy;thus,it must be considered not only for wave energy extraction but also for wind turbine fatigue,stability,and power extraction efciency.展开更多
According to the wind-wave individual case directional spectra obtained from the instrument array and'956' wave buoy measures, the wind-wave directional spectra presented by Mitsuyasu, Donelan and Hasselmann o...According to the wind-wave individual case directional spectra obtained from the instrument array and'956' wave buoy measures, the wind-wave directional spectra presented by Mitsuyasu, Donelan and Hasselmann onthe basis of the observations as well as theoretical wind-wave directional spectra by Wen Shengchang on the basis ofanalytic method are compared and checked from the pointview of total energy. Results show that Mitsuyasu's directional spectra are well identical with the measured wind-wave directional spectra developing fully in the Bohai Sea.Donelan's and theoretical wind-wave directional spectra are also quite consistent with the measured results in the development of the wind waves, especially best with the measured results in the initial stage of the development of thewind waves.展开更多
Using the limit surface slope as a criterion of wave breaking, a simple model for estimating the spatial fraction of breaking surface of sea at an instant, which is regarded as the whitecap coverge in this paper, is a...Using the limit surface slope as a criterion of wave breaking, a simple model for estimating the spatial fraction of breaking surface of sea at an instant, which is regarded as the whitecap coverge in this paper, is analytically derived from the probability density of surface slope based on Gaussian statistics. The resulting fraction is found depending on the fourth moment of wave spectum, m(4), as well as the critical threshold of surface slope. By expressing the fourth moment in terms of the Neumann spectrum, a formula linking the fraction and wind speed for fully developed sea states is obtianed. Another formula relating the fraction to both wind speed and fetch (or duration) is achieved by expressing m, in terms of the Krylov spectrum and applying the empirical relationships used in the SMB ocean wave predicting technique. A comparison between these results and the field data of whitecap coverage collected by Monahan and O'Muircheartuigh shows an encouraging agreement.展开更多
On May 16,2019,the CPC Central Committee and the State Council issued Outline of Digital Village Development Strategy(shortened into the Outline in the following part),together with a notice requiring discreet impleme...On May 16,2019,the CPC Central Committee and the State Council issued Outline of Digital Village Development Strategy(shortened into the Outline in the following part),together with a notice requiring discreet implementation by related departments in all areas.The Outline points out that by 2020,a primary progress should be achieved in the field of digital village construction.The coverage rate of 4G in administrative villages of the country should be more than 98%,and the popularization rate of internet connection should be significantly promoted in the rural area.展开更多
文摘Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed countries, with a population unevenly distributed across numerous islands varying greatly in size and population density. This study provides an in-depth analysis of the unique waste management practices across different regions of Maldives in relation to its natural and socioeconomic context. Data shows Maldives has one of the highest population density and per capita waste generation among SIDS, despite its small land area and medium GDP per capita. Large disparities exist between the densely populated capital Male’ with only 5.8 km2 area generating 63% of waste and the ~194 scattered outer islands with ad hoc waste management practices. Given Male’s dense population and high calorific waste, incineration could generate up to ~30 GW/a energy and even increase Maldives’ renewable energy supply by 200%. In contrast, decentralized anaerobic digestion presents an optimal solution for outer islands to reduce waste volume while providing over 40%–100% energy supply for daily cooking in local families. This timely study delivers valuable insights into designing context-specific waste-to-energy systems and integrated waste policies tailored to Maldives’ distinct regions. The framework presented can also guide other SIDS facing similar challenges as Maldives in establishing sustainable, ecologically sound waste management strategies.
文摘Modern hydrobiology,mainly,is based on conception,which may be named Conception of unicity of ecosystem stable state(CUESS):Mature ecosystems are stable and in dynamic equilibrium.Ecosystem state fluctuates around
文摘The Chinese government set up the State Development Bank against the background of the Chinese economic system being transformed from planned to market. In May 1995, the State Development Investment Corporation was established. Does this mean that China’s investment system reform is advancing at a much
文摘Economic growth and environmental "friendliness" are the dual missions of China's grand western development. In the past eight years,China has seen the gap between eastern and western regions still widening while also taking on the arduous task of protecting nature,ecology and environment in the western region. How has western development fared in the past eight years? What difficulties and challenges are being encountered? The development of the western region poses the single greatest difficulty facing China's regional economic development,but how can we advance along a "sound and fast" development path? The establishment of economic zones in Chengdu and Chongqing,Guanzhong and North Bay has opened up new possibilities and expectations for western China's economic development.
文摘The establishment of the State Power Grid Development Corp Ltd(SPG) was officially announced on June 18, marking the government’s determination to form a nationwide united power network to make the best of power generating capability. The State-owned corporation, with 2.5 billion yuan ($301 million) worth of operating capital raised by the government, will be responsible for investment. construction and management of the power transmission and substation projects involved in the construction of the Three Gorges Project.
文摘Based on the review of the papers and other related material submitted to the conference, the status quo and developmental trends of geocryology is briefly discussed.
文摘Language acquisition is a system with four components： language development, academic development, cognitive development and sociocultural development. Based on this theory, Chinese students in the United States are studied from three perspectives： linguistically, culturally, and social psychologically. It indicated that, to help Chinese students develop their English performance and cultural appreciation in this diverse world, the profession of English teaching in China should cover a variety of domains, including linguistic, cultural and psychological input. Both American and Chinese education can benefit from this special group of Chinese students if they can be better understood, and used as a bridge between China and U. S. cultural and academic exchange. In the meantime, the mirror held up to the Chinese students in these perspectives reflects not only who they are but also who they can become.
文摘Since the founding of New China in 1949, according to the Constitution of the People＇s Republic of China, the central government has made it a basic state policy to help ethnic minorities-inhabited border areas with their political, economic and cultural development, and to lead all the ethnic groups of China onto the road to common prosperity.
文摘Computer science and technology play an important role in people’s lives and work,especially in the era of big data.The application of computer science and technology is conducive to improving people’s production and living standards and provides a strong impetus for China’s social and economic development.Therefore,this paper analyzes the application of computer science and technology in the context of big data and puts forward new trends and requirements for its future development,aiming to provide some references for the computer science and technology industry.
文摘Complementarities between wind and wave energies have many signifcant advantages that are unavailable with the sole deployment of either.Using all available wind speed,signifcant wave height,and wave period buoy observations over a 10-year period(i.e.,2009–2019),colocated wind and wave energy resources are estimated.Although buoy records are imper-fect,results show that the inner Caribbean Sea(CS)under the infuence of the Caribbean low-level jet has the highest wind energy resource at~1500 W/m^(2),followed by the outer CS at~600 W/m^(2) and Atlantic Ocean(AO)at~550–600 W/m^(2) at a 100 m height.Wave energy was most abundant in the AO at 14 kW/m,followed by the inner CS at 13 kW/m and outer CS at 5 kW/m.The average and dominant wave energies can reach a maximum of 10 and 14 kW/m,respectively.Asymmetry between wind and wave energy resources is observed in the AO,where wave energy is higher than the low wind speed/energy would suggest.Swell is responsible for this discrepancy;thus,it must be considered not only for wave energy extraction but also for wind turbine fatigue,stability,and power extraction efciency.
文摘According to the wind-wave individual case directional spectra obtained from the instrument array and'956' wave buoy measures, the wind-wave directional spectra presented by Mitsuyasu, Donelan and Hasselmann onthe basis of the observations as well as theoretical wind-wave directional spectra by Wen Shengchang on the basis ofanalytic method are compared and checked from the pointview of total energy. Results show that Mitsuyasu's directional spectra are well identical with the measured wind-wave directional spectra developing fully in the Bohai Sea.Donelan's and theoretical wind-wave directional spectra are also quite consistent with the measured results in the development of the wind waves, especially best with the measured results in the initial stage of the development of thewind waves.
基金This work was financially supported by the National Science Foundation of China(No.49476270,49706067)
文摘Using the limit surface slope as a criterion of wave breaking, a simple model for estimating the spatial fraction of breaking surface of sea at an instant, which is regarded as the whitecap coverge in this paper, is analytically derived from the probability density of surface slope based on Gaussian statistics. The resulting fraction is found depending on the fourth moment of wave spectum, m(4), as well as the critical threshold of surface slope. By expressing the fourth moment in terms of the Neumann spectrum, a formula linking the fraction and wind speed for fully developed sea states is obtianed. Another formula relating the fraction to both wind speed and fetch (or duration) is achieved by expressing m, in terms of the Krylov spectrum and applying the empirical relationships used in the SMB ocean wave predicting technique. A comparison between these results and the field data of whitecap coverage collected by Monahan and O'Muircheartuigh shows an encouraging agreement.
文摘On May 16,2019,the CPC Central Committee and the State Council issued Outline of Digital Village Development Strategy(shortened into the Outline in the following part),together with a notice requiring discreet implementation by related departments in all areas.The Outline points out that by 2020,a primary progress should be achieved in the field of digital village construction.The coverage rate of 4G in administrative villages of the country should be more than 98%,and the popularization rate of internet connection should be significantly promoted in the rural area.
