According to the survey of Guangdong mangrove resource in 2001 and authors field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for ...According to the survey of Guangdong mangrove resource in 2001 and authors field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for 41.4% of total mangrove land area of China. These mangrove forests totally consisted of 50 species belonging to 28 families, distributed at more than 100 locations along the coastlines of Guangdong and most of them present a high dense and dwarf appearance. The Ass. Avicennia marina is the most dominant mangrove association. The investigation results showed that the mangrove forests with coverage rates above 0.7 accounted for 68.0% of the total mangrove land area of the province and 77.8% of mangrove forests was less than 2 m in tree height. Since 1950, 54.6% of mangrove forests have disappeared due to paddy rice reclaim, aquaculture and city constructions. Derivational conservation efforts are still weakly empowered and should be strengthened intensively. The author suggested that mangrove laws and regulations should be enforced, mangrove scientific research should be strengthened; and mangrove conservation awareness of local community should be raised on conservation of mangroves.展开更多
This paper reviewed the present status of research about tiger in China. At present, four survival subspecies are endangered in China. Tiger has decreased greatly in number, and its distribution has limited to some ar...This paper reviewed the present status of research about tiger in China. At present, four survival subspecies are endangered in China. Tiger has decreased greatly in number, and its distribution has limited to some areas. The published papers on morphology and anatomy were relatively few, while much work has been done on physiology and biochemistry of captive tigers. The author pointed out a few further research fields. The studies of chromosomes, gene, cloning and establishment of gene bank should be mostly focusing fields. Feeding and breeding techniques must be improved and reinforced.展开更多
The first Chinese superconducting tokamak HT-7 was reconstructed on the basis of a Russian tokamak T-7.The main purpose of reconstruction is to improve the accessibility of the device and to provide a possibility of l...The first Chinese superconducting tokamak HT-7 was reconstructed on the basis of a Russian tokamak T-7.The main purpose of reconstruction is to improve the accessibility of the device and to provide a possibility of long pulse operation with high performance. The reconstruction has been done successfully. The HT-7U project has been approved and funded as a National Project, the engineering design and R & D are under way.展开更多
OBJECTIVE: To explain the present status of study on diffuse axonal injury, investigate its pathogenesis and pathophysiological changes, and suggest principles for the diagnosis and treatment. DATA SOURCES: Articles a...OBJECTIVE: To explain the present status of study on diffuse axonal injury, investigate its pathogenesis and pathophysiological changes, and suggest principles for the diagnosis and treatment. DATA SOURCES: Articles about diffuse axonal injury published in English from January 1994 to October 2006 were searched in Pubmed database using the of 'diffuse axonal injury, pathogenesis, therapy'. STUDY SELECTION: The collected articles were primarily screened to select those associated with diffuse axonal injury, the obviously irrelated articles were excluded, and the rest ones were retrieved manually, and the full-texts were searched. DATA EXTRACTION: Totally 98 articles were collected, 41 of them were involved, and the other 57 were excluded. DATA SYNTHESIS: Diffuse axonal injury is mainly caused by acceleratory or deceleratory injury, and its pathophysiological change is a progressive duration, local axonal injury finally develops to axonal breakage, mainly includes inactivation of natrium channel, intracellular Ca2+ overloading, activation of calcium protease, caspase, etc., and mitochondrial injury. At present, there is still lack of effective therapeutic methods for diffuse axonal injury, so we should actively explore more effective methods to relieve the pain of patients and improve their prognosis. CONCLUSION: At present, diffuse axonal injury has not attracted enough attentions in China, the mechanisms for its diagnosis and attack are still unclear, and the treatments are mainly aiming at the symptoms.展开更多
Coal is China’s principal source ofenergy, accounting for about 75percent of primary energy. This patternwill remain unchanged for a long period oftime from now on. Thanks to the effortsmade during the Eighth Five-Ye...Coal is China’s principal source ofenergy, accounting for about 75percent of primary energy. This patternwill remain unchanged for a long period oftime from now on. Thanks to the effortsmade during the Eighth Five-Year Plan period,the general situation for the coal industry isnow good.展开更多
Ⅰ. GENERAL SITUATION The petrochemical industry is a technology and capital-intensive industry. The United States took the lead in the development of the petrochemical industry and started launching petrochemical pro...Ⅰ. GENERAL SITUATION The petrochemical industry is a technology and capital-intensive industry. The United States took the lead in the development of the petrochemical industry and started launching petrochemical projects in the 1930s and 1940s. The petrochemical industry in other developed countries, such as Germany, the United kingdom, France, Italy and Japan, began their development in the 1960s and 1970s.The petrochemical industry in these countries has played展开更多
Several seismic gaps have been identified along the Xianshuihe-Xiaojiang fault zone and the Longmenshan fault zone in the Sichuan-Yunnan region, including the Daofu-Shimian gap on the Xianshuihe Fault, the Anninghe-Ze...Several seismic gaps have been identified along the Xianshuihe-Xiaojiang fault zone and the Longmenshan fault zone in the Sichuan-Yunnan region, including the Daofu-Shimian gap on the Xianshuihe Fault, the Anninghe-Zemuhe gap, parts of the Xiaojiang Fault, and the Dayi gap between the Wenchuan and Lushan earthquakes. The seismic hazards of the Daofu-Shimian and Dayi gaps have aroused great concern and caused considerable debate. This paper reviews the recent geophysical observations and multidisciplinary studies conducted by domestic and international researchers in these areas, focusing on seismogenic structures, seismic activity, fault locking, stress fields, as well as earthquake triggering, and further analyzes the current controversial viewpoints about the seismic hazards in these regions. Based on the comprehensive analysis, we argue that the kinematic status along the Daofu-Shimian segment may vary significantly along the fault strike. Due to limitations in data and models, there is no consensus on the seismogenic potential of this area. Conversely, the Dayi seismic gap presents a high seismic potential. Furthermore, we delve into the scientific problems associated with major seismic gaps in the Sichuan-Yunnan region and make prospects for the strategy of future work. We propose a research framework that combines dense array and distributed acoustic sensing, artificial intelligence and big data technologies, joint inversion of multiple geophysical fields, as well as numerical simulation techniques for comprehensive seismic hazard analysis in seismic gaps.展开更多
This paper lists the existing main problems that poplar industry faces in Jiangsu and analyses thecauses and the activities of different industry related to management institution and system according to thefactors of...This paper lists the existing main problems that poplar industry faces in Jiangsu and analyses thecauses and the activities of different industry related to management institution and system according to thefactors of knowledge infrastructure, institutional setups, government policies and production structure.展开更多
High myopia, is a condition of the diopter over -6.00D, accompanied by axial extension and fundus changes, suchas temporal arc plaque, pigment epithelium thinning, leopard-shaped fundus, fuchs spot, retina choroidal a...High myopia, is a condition of the diopter over -6.00D, accompanied by axial extension and fundus changes, suchas temporal arc plaque, pigment epithelium thinning, leopard-shaped fundus, fuchs spot, retina choroidal atrophy,progressive decline in vision, as well as amblyopia, glaucoma, cataract, vitreous opacity, retinal detachment andother ophthalmic diseases. High myopia is one of the common causes of blindness in China. It is necessary toreview these cases in order to better guide the clinical and improve the level of vision of patients.展开更多
The current status of catalytic reforming in China is reviewed and a forecastof the development in a couple of years or a decade is given. Distinguished from the past decade,the future trend will be focused on revamps...The current status of catalytic reforming in China is reviewed and a forecastof the development in a couple of years or a decade is given. Distinguished from the past decade,the future trend will be focused on revamps, expansions, higher severity, diversified feeds,combination with other processes for higher product quality, and novel catalysts and equipment.展开更多
文摘According to the survey of Guangdong mangrove resource in 2001 and authors field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for 41.4% of total mangrove land area of China. These mangrove forests totally consisted of 50 species belonging to 28 families, distributed at more than 100 locations along the coastlines of Guangdong and most of them present a high dense and dwarf appearance. The Ass. Avicennia marina is the most dominant mangrove association. The investigation results showed that the mangrove forests with coverage rates above 0.7 accounted for 68.0% of the total mangrove land area of the province and 77.8% of mangrove forests was less than 2 m in tree height. Since 1950, 54.6% of mangrove forests have disappeared due to paddy rice reclaim, aquaculture and city constructions. Derivational conservation efforts are still weakly empowered and should be strengthened intensively. The author suggested that mangrove laws and regulations should be enforced, mangrove scientific research should be strengthened; and mangrove conservation awareness of local community should be raised on conservation of mangroves.
文摘This paper reviewed the present status of research about tiger in China. At present, four survival subspecies are endangered in China. Tiger has decreased greatly in number, and its distribution has limited to some areas. The published papers on morphology and anatomy were relatively few, while much work has been done on physiology and biochemistry of captive tigers. The author pointed out a few further research fields. The studies of chromosomes, gene, cloning and establishment of gene bank should be mostly focusing fields. Feeding and breeding techniques must be improved and reinforced.
文摘The first Chinese superconducting tokamak HT-7 was reconstructed on the basis of a Russian tokamak T-7.The main purpose of reconstruction is to improve the accessibility of the device and to provide a possibility of long pulse operation with high performance. The reconstruction has been done successfully. The HT-7U project has been approved and funded as a National Project, the engineering design and R & D are under way.
文摘OBJECTIVE: To explain the present status of study on diffuse axonal injury, investigate its pathogenesis and pathophysiological changes, and suggest principles for the diagnosis and treatment. DATA SOURCES: Articles about diffuse axonal injury published in English from January 1994 to October 2006 were searched in Pubmed database using the of 'diffuse axonal injury, pathogenesis, therapy'. STUDY SELECTION: The collected articles were primarily screened to select those associated with diffuse axonal injury, the obviously irrelated articles were excluded, and the rest ones were retrieved manually, and the full-texts were searched. DATA EXTRACTION: Totally 98 articles were collected, 41 of them were involved, and the other 57 were excluded. DATA SYNTHESIS: Diffuse axonal injury is mainly caused by acceleratory or deceleratory injury, and its pathophysiological change is a progressive duration, local axonal injury finally develops to axonal breakage, mainly includes inactivation of natrium channel, intracellular Ca2+ overloading, activation of calcium protease, caspase, etc., and mitochondrial injury. At present, there is still lack of effective therapeutic methods for diffuse axonal injury, so we should actively explore more effective methods to relieve the pain of patients and improve their prognosis. CONCLUSION: At present, diffuse axonal injury has not attracted enough attentions in China, the mechanisms for its diagnosis and attack are still unclear, and the treatments are mainly aiming at the symptoms.
文摘Coal is China’s principal source ofenergy, accounting for about 75percent of primary energy. This patternwill remain unchanged for a long period oftime from now on. Thanks to the effortsmade during the Eighth Five-Year Plan period,the general situation for the coal industry isnow good.
文摘Ⅰ. GENERAL SITUATION The petrochemical industry is a technology and capital-intensive industry. The United States took the lead in the development of the petrochemical industry and started launching petrochemical projects in the 1930s and 1940s. The petrochemical industry in other developed countries, such as Germany, the United kingdom, France, Italy and Japan, began their development in the 1960s and 1970s.The petrochemical industry in these countries has played
基金supported by the Key Research and Development Project of the Ministry of Science and Technology (Grant No. 2023YFC3007302)the National Natural Science Foundation of China (Grant Nos. 42274082, 42030108 & 42394112)+3 种基金the Knowledge Innovation Special Project of Wuhan Municipal Science and Technology Bureau (Grant No. 2023010201020281)the Open Fund of Hubei Luojia Laboratory (Grant No. 230100015)the Open Fund of State Key Laboratory of Geological Processes and Mineral Resources of the Ministry of Science and Technology (Grant No. MSFGPMR2024-502)the Open Project of the National Science Centre for Precision Gravity Measurement (Grant No. PGMF-2024-P010)。
文摘Several seismic gaps have been identified along the Xianshuihe-Xiaojiang fault zone and the Longmenshan fault zone in the Sichuan-Yunnan region, including the Daofu-Shimian gap on the Xianshuihe Fault, the Anninghe-Zemuhe gap, parts of the Xiaojiang Fault, and the Dayi gap between the Wenchuan and Lushan earthquakes. The seismic hazards of the Daofu-Shimian and Dayi gaps have aroused great concern and caused considerable debate. This paper reviews the recent geophysical observations and multidisciplinary studies conducted by domestic and international researchers in these areas, focusing on seismogenic structures, seismic activity, fault locking, stress fields, as well as earthquake triggering, and further analyzes the current controversial viewpoints about the seismic hazards in these regions. Based on the comprehensive analysis, we argue that the kinematic status along the Daofu-Shimian segment may vary significantly along the fault strike. Due to limitations in data and models, there is no consensus on the seismogenic potential of this area. Conversely, the Dayi seismic gap presents a high seismic potential. Furthermore, we delve into the scientific problems associated with major seismic gaps in the Sichuan-Yunnan region and make prospects for the strategy of future work. We propose a research framework that combines dense array and distributed acoustic sensing, artificial intelligence and big data technologies, joint inversion of multiple geophysical fields, as well as numerical simulation techniques for comprehensive seismic hazard analysis in seismic gaps.
文摘This paper lists the existing main problems that poplar industry faces in Jiangsu and analyses thecauses and the activities of different industry related to management institution and system according to thefactors of knowledge infrastructure, institutional setups, government policies and production structure.
文摘High myopia, is a condition of the diopter over -6.00D, accompanied by axial extension and fundus changes, suchas temporal arc plaque, pigment epithelium thinning, leopard-shaped fundus, fuchs spot, retina choroidal atrophy,progressive decline in vision, as well as amblyopia, glaucoma, cataract, vitreous opacity, retinal detachment andother ophthalmic diseases. High myopia is one of the common causes of blindness in China. It is necessary toreview these cases in order to better guide the clinical and improve the level of vision of patients.
文摘The current status of catalytic reforming in China is reviewed and a forecastof the development in a couple of years or a decade is given. Distinguished from the past decade,the future trend will be focused on revamps, expansions, higher severity, diversified feeds,combination with other processes for higher product quality, and novel catalysts and equipment.
