前瞻性临床研究显示,患者首次脑卒中的发病率同患有心肌梗死、非脑卒中患者的血压有直接的关系,而经抗高血压临床治疗对照试验,可知舒张压的下降同高血压患者脑卒中再发的几率呈线性关系,平均每降低5~6 mm Hg,发病几率则减少30%~40%。...前瞻性临床研究显示,患者首次脑卒中的发病率同患有心肌梗死、非脑卒中患者的血压有直接的关系,而经抗高血压临床治疗对照试验,可知舒张压的下降同高血压患者脑卒中再发的几率呈线性关系,平均每降低5~6 mm Hg,发病几率则减少30%~40%。针对高血压人群及非高血压人群进行降压治疗,可以有效预防脑卒中再发,可以通过临床PROGRESS、PATS试验进行验证。通过研究降压治疗对脑卒中再发预防的研究,分析PROGRESS和PATS试验及其临床意义,以期通过降压治疗的方式,控制脑卒中的发病率,改善脑血管疾病患者的生活质量,更好的指导临床治疗。展开更多
The ecosystem services are material base and natural capital for sustainable development of human being. Valuation of ecosystem services is favorable for people realizing the importance of natural ecosystem to human b...The ecosystem services are material base and natural capital for sustainable development of human being. Valuation of ecosystem services is favorable for people realizing the importance of natural ecosystem to human being, and considering its long-term influence on sustainable development of human society when making decisions. Besides, it is an attempt of ecology, geography and other natural sciences to influence social decision process by economic methods. The Value of the World's Ecosystem Services and Natural Capital, written by Robert Costanza et al., in 1997, is generally regarded as a masterpiece for the research of valuing ecosystem services. However, the classifying standard of ecosystem services, the method of various services summation and the purpose for static global value, had confronted many criticisms. Still to now, accurately valuing ecosystem services is not easy, because of the complexity of natural ecosystem, the weak capability of economic system to pricing ecosystem services and the lack of more study in this field. Based on the criticisms summarizing and comprehensive analysis, further study suggestions of ecosystem services valuation is presented: multi-scale integrated and community participation applied in evaluation, dynamic changes of material value and intangible value of ecosystem services, investigation and simulation studies of the marginal value when ecosystem services changed, associated with related areas like ecological compensation research, and research on the market-oriented evaluation of ecosystem's intangible values.展开更多
The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young adulthood.Impaire...The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young adulthood.Impaired neurodevelopment can result in various neurological and psychiatric conditions,jointly named neurodevelopmental disorders(NDDs).展开更多
今年2月5日,位于西部非洲的布基纳法索以原执政的争取人民民主组织——劳动运动为基础,联合其他10个政党和另外2个政党的部分人,共同组建了一个新党——争取民主和进步大会党(CONGRES POUR LADEMOCRATIE ET LE PROGRES),属于社会民主党...今年2月5日,位于西部非洲的布基纳法索以原执政的争取人民民主组织——劳动运动为基础,联合其他10个政党和另外2个政党的部分人,共同组建了一个新党——争取民主和进步大会党(CONGRES POUR LADEMOCRATIE ET LE PROGRES),属于社会民主党性质。展开更多
A thorough investigation have been first carried out on the electron trans- ferring between molecules by using the ab initio electrostatic potential method.By this method,we made a theoretical estimation of the energy...A thorough investigation have been first carried out on the electron trans- ferring between molecules by using the ab initio electrostatic potential method.By this method,we made a theoretical estimation of the energy barrier that electrons tunnel when they move from one molecule to another.The results show that for two molecules very close to each other the height of the barrier goes down exponentially with a decreasing intermolecular distance.Substituting groups have effect on the height of the barrier. The photoelectric current produced in a simulative system has also been theoretically predicted.展开更多
It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery i...It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery is successfully carnied out by a computer with ingenious progrorming.展开更多
代词(pronoun)所代替的词,叫做代词的先行词(antecedent)。例如: I invited Joan,but she could not attend.(she代替Joan,Joan是she的先行词。) Because Joan and Mary were on vacation,I did not see them.(them的先行词是Joan and M...代词(pronoun)所代替的词,叫做代词的先行词(antecedent)。例如: I invited Joan,but she could not attend.(she代替Joan,Joan是she的先行词。) Because Joan and Mary were on vacation,I did not see them.(them的先行词是Joan and Mary.)展开更多
To celebrate the 100th anniversary of the founding of the CPC this year,this column features the stories on standards development and practices to showcase the great progress in the standardization field in China over...To celebrate the 100th anniversary of the founding of the CPC this year,this column features the stories on standards development and practices to showcase the great progress in the standardization field in China over the past few decades.展开更多
920707 IL1, TGF B mRNA Expression dur-ing the course of glomerulonephritis and glomerulosclerosis. ZHAO Zhihui(赵志辉),et al. Nephrol Center, Beijing Med Univ, 100034.Nat1 Meal J China 1992; 72(4): 195-197.
A Remote Sensing Image Semantic Segmentation Method by Combining De formable Convolution with Conditional Random Fields Zongcheng ZUO1,Wen ZHANG2,Dongying ZHANG31.Schood of Aeronautics and Astronoutics,Shanghai Jiao T...A Remote Sensing Image Semantic Segmentation Method by Combining De formable Convolution with Conditional Random Fields Zongcheng ZUO1,Wen ZHANG2,Dongying ZHANG31.Schood of Aeronautics and Astronoutics,Shanghai Jiao Tong Uniberily。Shanghai 200240,China;2.School of Remole Sensing and Informarion Engineering,Wuhan Unieriy,Wushan 430079,China;3.Schood of Hydrppower and Information Eninering.Huashong Uninersity of Science and Technologr,Wuhan 430074,China.Abstract:Curently,deep convolutional neunal networks have made great progres in the field of semantie segmentation.Because of the fixed convolution kemel geometry,standard convolution neural networks have been limited in the ability to simulate geomnetric transformations.Therefore。a deformable convolution is introduced to enhance the adaptability of coovolutional neheorks to spatial transformation.展开更多
文摘前瞻性临床研究显示,患者首次脑卒中的发病率同患有心肌梗死、非脑卒中患者的血压有直接的关系,而经抗高血压临床治疗对照试验,可知舒张压的下降同高血压患者脑卒中再发的几率呈线性关系,平均每降低5~6 mm Hg,发病几率则减少30%~40%。针对高血压人群及非高血压人群进行降压治疗,可以有效预防脑卒中再发,可以通过临床PROGRESS、PATS试验进行验证。通过研究降压治疗对脑卒中再发预防的研究,分析PROGRESS和PATS试验及其临床意义,以期通过降压治疗的方式,控制脑卒中的发病率,改善脑血管疾病患者的生活质量,更好的指导临床治疗。
基金Supported by Project of China’s Tourism Industry Innovation Team for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality of China (Grant No.:306002)Project of "Theory to Practice of Sustainable Development-Energy Saving and Emission Reduction of Tourism Industry" Initiated by Beijing International Studies University in 2011
文摘The ecosystem services are material base and natural capital for sustainable development of human being. Valuation of ecosystem services is favorable for people realizing the importance of natural ecosystem to human being, and considering its long-term influence on sustainable development of human society when making decisions. Besides, it is an attempt of ecology, geography and other natural sciences to influence social decision process by economic methods. The Value of the World's Ecosystem Services and Natural Capital, written by Robert Costanza et al., in 1997, is generally regarded as a masterpiece for the research of valuing ecosystem services. However, the classifying standard of ecosystem services, the method of various services summation and the purpose for static global value, had confronted many criticisms. Still to now, accurately valuing ecosystem services is not easy, because of the complexity of natural ecosystem, the weak capability of economic system to pricing ecosystem services and the lack of more study in this field. Based on the criticisms summarizing and comprehensive analysis, further study suggestions of ecosystem services valuation is presented: multi-scale integrated and community participation applied in evaluation, dynamic changes of material value and intangible value of ecosystem services, investigation and simulation studies of the marginal value when ecosystem services changed, associated with related areas like ecological compensation research, and research on the market-oriented evaluation of ecosystem's intangible values.
基金supported by Danish National Research Foundation(#DNRF133)(to AN)。
文摘The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young adulthood.Impaired neurodevelopment can result in various neurological and psychiatric conditions,jointly named neurodevelopmental disorders(NDDs).
文摘A thorough investigation have been first carried out on the electron trans- ferring between molecules by using the ab initio electrostatic potential method.By this method,we made a theoretical estimation of the energy barrier that electrons tunnel when they move from one molecule to another.The results show that for two molecules very close to each other the height of the barrier goes down exponentially with a decreasing intermolecular distance.Substituting groups have effect on the height of the barrier. The photoelectric current produced in a simulative system has also been theoretically predicted.
文摘It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery is successfully carnied out by a computer with ingenious progrorming.
文摘代词(pronoun)所代替的词,叫做代词的先行词(antecedent)。例如: I invited Joan,but she could not attend.(she代替Joan,Joan是she的先行词。) Because Joan and Mary were on vacation,I did not see them.(them的先行词是Joan and Mary.)
文摘To celebrate the 100th anniversary of the founding of the CPC this year,this column features the stories on standards development and practices to showcase the great progress in the standardization field in China over the past few decades.
文摘920707 IL1, TGF B mRNA Expression dur-ing the course of glomerulonephritis and glomerulosclerosis. ZHAO Zhihui(赵志辉),et al. Nephrol Center, Beijing Med Univ, 100034.Nat1 Meal J China 1992; 72(4): 195-197.
文摘A Remote Sensing Image Semantic Segmentation Method by Combining De formable Convolution with Conditional Random Fields Zongcheng ZUO1,Wen ZHANG2,Dongying ZHANG31.Schood of Aeronautics and Astronoutics,Shanghai Jiao Tong Uniberily。Shanghai 200240,China;2.School of Remole Sensing and Informarion Engineering,Wuhan Unieriy,Wushan 430079,China;3.Schood of Hydrppower and Information Eninering.Huashong Uninersity of Science and Technologr,Wuhan 430074,China.Abstract:Curently,deep convolutional neunal networks have made great progres in the field of semantie segmentation.Because of the fixed convolution kemel geometry,standard convolution neural networks have been limited in the ability to simulate geomnetric transformations.Therefore。a deformable convolution is introduced to enhance the adaptability of coovolutional neheorks to spatial transformation.
