The elastic modulus and attenuation coefficient of polycrystalline NdFeB magnet have been measured at different temperatures by ultrasonic method.At room temperature,the elastic modulus shows small but apparent anisot...The elastic modulus and attenuation coefficient of polycrystalline NdFeB magnet have been measured at different temperatures by ultrasonic method.At room temperature,the elastic modulus shows small but apparent anisotropy,while at low temperatures the ultrasonic velocity and attenuation coefficient are both changed anomalously.We suppose that this phenomenon is caused by the abrupt change of the direction of magnetization.展开更多
Studies were conducted to determine the cause of the acute mortality of cage-cultured Epinephelus awoara in the Tong＇ an Bay of Xiamen, China during the summer of 2002. Predominant bacteria strain TS-628 was isolated...Studies were conducted to determine the cause of the acute mortality of cage-cultured Epinephelus awoara in the Tong＇ an Bay of Xiamen, China during the summer of 2002. Predominant bacteria strain TS-628 was isolated from the diseased grouper. The virulence test confirmed that TS-628 was the pathogenic bacterium. Biochemical characteristics of the isolates were determined using the automatic bacterial identification system and standard tube tests. To further confirm the identification, a 1 121 bp 16S rRNA gene sequence of the isolate was amplified by PCR, which had been deposited into Genbank （accession number： AY747308）. According to the biochemical characteristics and by comparing the 16S rRNA gene homology of the isolate, the pathogenic bacterium was identified as Vibrio harveyi, Drug sensitivity tests showed that this pathogenic bacterium was sensitive to 16 antibacterials, especially to chloramphenicol and actinospectacin, but completely resistant to antibacterials likes vancomycin, penicillin, lincomycin, and so on.展开更多
BNU Law School is one of the youngest and most dynamic faculties at Beijing Normal University.Its precursor was the Law major established by the Department of Philosophy in 1995,the Department of Law established in 20...BNU Law School is one of the youngest and most dynamic faculties at Beijing Normal University.Its precursor was the Law major established by the Department of Philosophy in 1995,the Department of Law established in 2002,and the Criminal Law Science Research Institute was established in 2005.It culminated in the formal establishment of BNU Law School in 2006.Although BNU Law School was established in recent time,it has made outstanding achievements in various fields.展开更多
The problem of water pollution is one of the long-term difficulties in the process of rural environmental construction and economic development in China.In order to meet the requirements of the country’s green and su...The problem of water pollution is one of the long-term difficulties in the process of rural environmental construction and economic development in China.In order to meet the requirements of the country’s green and sustainable development,many regions actively promote the construction of rural sewage treatment and fill in the shortcomings of the rural habitat environment to accelerate the construction of beautiful and livable villages.Through a lot of literature and case studies,this paper explores the environmental problems that are common in rural sewage treatment in the northern region of China,explores advanced domestic and foreign cases and technologies on this topic,and summarizes the landscape design strategies on this issue.From the perspective of ecological landscape design,the thesis seeks the theoretical and technical support for rural sewage treatment in river valley areas,and establishes a bridge between rural sewage treatment technology and ecological landscape.Finally,combining theory with practice,taking the project of Lushi sewage treatment in Sanmenxia as an example,team completed the landscape design of ecological sewage purification display area in Zhangjiacun.The design focuses on presenting the application of internal sewage treatment technology and external landscape aesthetics.According to the main points of ecological landscape design and the theory of ecological edge effect,the local ecological system is effectively protected,and a rural domestic sewage purification display area with economic benefits is constructed.展开更多
文摘The elastic modulus and attenuation coefficient of polycrystalline NdFeB magnet have been measured at different temperatures by ultrasonic method.At room temperature,the elastic modulus shows small but apparent anisotropy,while at low temperatures the ultrasonic velocity and attenuation coefficient are both changed anomalously.We suppose that this phenomenon is caused by the abrupt change of the direction of magnetization.
文摘Studies were conducted to determine the cause of the acute mortality of cage-cultured Epinephelus awoara in the Tong＇ an Bay of Xiamen, China during the summer of 2002. Predominant bacteria strain TS-628 was isolated from the diseased grouper. The virulence test confirmed that TS-628 was the pathogenic bacterium. Biochemical characteristics of the isolates were determined using the automatic bacterial identification system and standard tube tests. To further confirm the identification, a 1 121 bp 16S rRNA gene sequence of the isolate was amplified by PCR, which had been deposited into Genbank （accession number： AY747308）. According to the biochemical characteristics and by comparing the 16S rRNA gene homology of the isolate, the pathogenic bacterium was identified as Vibrio harveyi, Drug sensitivity tests showed that this pathogenic bacterium was sensitive to 16 antibacterials, especially to chloramphenicol and actinospectacin, but completely resistant to antibacterials likes vancomycin, penicillin, lincomycin, and so on.
文摘BNU Law School is one of the youngest and most dynamic faculties at Beijing Normal University.Its precursor was the Law major established by the Department of Philosophy in 1995,the Department of Law established in 2002,and the Criminal Law Science Research Institute was established in 2005.It culminated in the formal establishment of BNU Law School in 2006.Although BNU Law School was established in recent time,it has made outstanding achievements in various fields.
文摘The problem of water pollution is one of the long-term difficulties in the process of rural environmental construction and economic development in China.In order to meet the requirements of the country’s green and sustainable development,many regions actively promote the construction of rural sewage treatment and fill in the shortcomings of the rural habitat environment to accelerate the construction of beautiful and livable villages.Through a lot of literature and case studies,this paper explores the environmental problems that are common in rural sewage treatment in the northern region of China,explores advanced domestic and foreign cases and technologies on this topic,and summarizes the landscape design strategies on this issue.From the perspective of ecological landscape design,the thesis seeks the theoretical and technical support for rural sewage treatment in river valley areas,and establishes a bridge between rural sewage treatment technology and ecological landscape.Finally,combining theory with practice,taking the project of Lushi sewage treatment in Sanmenxia as an example,team completed the landscape design of ecological sewage purification display area in Zhangjiacun.The design focuses on presenting the application of internal sewage treatment technology and external landscape aesthetics.According to the main points of ecological landscape design and the theory of ecological edge effect,the local ecological system is effectively protected,and a rural domestic sewage purification display area with economic benefits is constructed.
