Every developing country has to meet the challenge of overcoming a condition of subalterrnity. After the victory of the Revolution in 1959, Cuba tackled this challenge in a very original way, prioritizing the developm...Every developing country has to meet the challenge of overcoming a condition of subalterrnity. After the victory of the Revolution in 1959, Cuba tackled this challenge in a very original way, prioritizing the development of scientific and technical know-how and of an advanced scientific system. Moreover, it pursued this goal with an extremely open attitude, using characteristic Cuban resourcefulness while at the same time taking advantage of every possible support and collaboration. While the country was increasingly integrated into the Soviet system and the Council for Mutual Economic Assistance （COMECON）, and therefore benefited from a close collaboration with the Soviet Union and the Eastern European countries＇ higher education and scientific systems, nevertheless it constantly sought collaboration with scientists and institutions in other countries as well, in particular in the Western world. The most meaningful instance of this collaboration is the development since the 1980s of an advanced biotechnological and biomedical system, which was created independently by the Soviet Union. Quite remarkably, when the socialist system collapsed, though Cuba faced a critical situation, the strategic choice was made not to cut support to this scientific sector, but rather to reinforce it. At present Cuba produces and exports advanced and in some cases unique vaccines and drugs, and this sector ranks as third in the country＇s source of current hard currency.展开更多
With the reform of the education system, the number of graduating students increases every year, and more and more severe graduate＇ s employment, while more and more companies are unable to recruit talent. Resulting ...With the reform of the education system, the number of graduating students increases every year, and more and more severe graduate＇ s employment, while more and more companies are unable to recruit talent. Resulting in difficult employment graduates there are many factors, the most important manifestations of contemporary graduates questioned the integrity of most enterprises, improve the status of today＇ s society difficult employment, increase the employment rate of graduates realize their own values of contemporary college students, meet the vital interests of the family, so that our talents and educational resources are fully utilized, so as to promote the healthy development of social harmony and stability as well as higher education. Social harmony and stability as well as for the healthy development of higher education, the vital interests of the students themselves and their families realize the value and so have certain theoretical and practical significance.展开更多
This paper presents a review of the development of scientific research and practice of earthquake underground fluid in China during the last 40 years, summaries early constructive research and primary achievements in ...This paper presents a review of the development of scientific research and practice of earthquake underground fluid in China during the last 40 years, summaries early constructive research and primary achievements in this field. The science of earthquake underground fluid is closely correlated with earthquake monitoring and prediction, such as innovations in observation techniques and theoretical methods, and analysis of diversified parameters and research into predictive methods. The historical evolution of observation networks for underground fluid indicates that the demand for strong earthquake monitoring and prediction has become the driving force of the construction and development of the observation network. The development of observation techniques represents the trend based on multiform measurement, syntheses, and digitization. The study results of underground fluid theory and precursory mechanisms suggest that the precursory model, numerical simuiation and in-door or field experimental research are the main technological approaches promoting innovation. Research results of earthquake forecast methods use physics based forecast techniques and the ideas of combination of usability and scientific advance. It has been proved by forecast practice that studying underground fluid is a very important subject in earthquake prediction on the Chinese mainland. Finally, the primary work and technical criterion on underground fluid are introduced, and some major scientific issues and development trends in different historical stages are summarized.展开更多
Gas fluidization has an ability to turn static particles to fluid-like dense flow, which allows greatly improved heat transfer among porous powders and highly efficient solid processing to become reality. As the risin...Gas fluidization has an ability to turn static particles to fluid-like dense flow, which allows greatly improved heat transfer among porous powders and highly efficient solid processing to become reality. As the rising star of current scientific research, some nanoparticles can also be fluidized in the form of agglomerates, with sizes ranging from tens to hundreds of microns. Herein, we have reviewed the recent progress on nanomaterial agglomeration and their fluidization behavior, the assisted techniques to enhance the fluidization of nanomaterials,including some mechanical measures, external fields and improved gas injections, as well as their effects on solid fluidization and mixing behaviors. Most of these techniques are effective in breaking large agglomerates and promoting particulate fluidization, meanwhile, the solid mixing is intensified under assisted fluidization. The applications of nanofluidization in nanostructured material production and sustainable chemical industry are further presented. In summary, the fluidization science of multidimensional, multicomponent and multifunctional particles, their multi-phase characterization, and the guideline of fluidized bed coupled process are prerequisites for the sustainable development of fluidized bed based materials, energy and chemical industry.展开更多
Objectival. To prepare a radioimmunoguided surgery （RIGS） system including radio-nuclides hand- held gamma detecting probe （GDP） with signal processing control unit, specific monoclonal antibody （MAb）, technique...Objectival. To prepare a radioimmunoguided surgery （RIGS） system including radio-nuclides hand- held gamma detecting probe （GDP） with signal processing control unit, specific monoclonal antibody （MAb）, technique of labeling as well as detection of ovarian carcinoma in nude mice bearing human ovari-an carcinoma. Metals. MAb COCl83B2, produced in our laboratory was used to prepare the F （ah’）2, fragment by ficin digestion. 99mTc labeling of COC183 B2-F（ab’）2, and normal mice IgG were prepared according to im- proved pretining method. GDP and control unit were made by Chinese Atomic Energy Research Institute. Different groups of nude mice bearing human ovarian carcinoma with ascites were administered with differ- ent dosages of 99mTo COCl83 B2-F（ab’）2, and their tissues measured by GDP in vivo and compared with gamma well counts after dissection in vitro. Results. 99mTc labeled COCl83B2-F（ab’）2, yielded a labeling rate of over 90%, and a good immunoac- tivity. The detections of carcinoma tissue by GDP showed a T/NT ratio of 2: 1 as positive for cancer. The smallest carcinoma detected was 0. 2cm × 0.1 cm and the nearest distance between carcinoma and normal tissue was 0. 2cm. Conclusions. The above studies proved that ficin can be used to digest MAbs with high yields and good immunoactivity of F（ab’）2. Our RIGS system with 99mTo labeled COC183 B2-F（ab’）2 and GDP can hope-fully be used clinically for ovarian carcinoma detection.展开更多
Innovation systems principles are increasingly applied for putting agricultural research into use. This paper presents and analyses three such initiatives located in South Asia, with an aim to generate empirical evide...Innovation systems principles are increasingly applied for putting agricultural research into use. This paper presents and analyses three such initiatives located in South Asia, with an aim to generate empirical evidence about practical aspects of the innovation process. These cases seem to suggest that the initial stages of innovation trajectory comprise of social engineering and creation of appropriate architecture of actors, after which need for new knowledge arises and favourable conditions develop for putting such knowledge into use. The cases also present how different types of agencies assume lead roles during different stages of innovation trajectory. The paper urges authorities from policy and practice to consider status of social architecture and the fact that different types of agencies play lead role in the innovation process before planning agricultural innovation initiatives.展开更多
文摘Every developing country has to meet the challenge of overcoming a condition of subalterrnity. After the victory of the Revolution in 1959, Cuba tackled this challenge in a very original way, prioritizing the development of scientific and technical know-how and of an advanced scientific system. Moreover, it pursued this goal with an extremely open attitude, using characteristic Cuban resourcefulness while at the same time taking advantage of every possible support and collaboration. While the country was increasingly integrated into the Soviet system and the Council for Mutual Economic Assistance （COMECON）, and therefore benefited from a close collaboration with the Soviet Union and the Eastern European countries＇ higher education and scientific systems, nevertheless it constantly sought collaboration with scientists and institutions in other countries as well, in particular in the Western world. The most meaningful instance of this collaboration is the development since the 1980s of an advanced biotechnological and biomedical system, which was created independently by the Soviet Union. Quite remarkably, when the socialist system collapsed, though Cuba faced a critical situation, the strategic choice was made not to cut support to this scientific sector, but rather to reinforce it. At present Cuba produces and exports advanced and in some cases unique vaccines and drugs, and this sector ranks as third in the country＇s source of current hard currency.
文摘With the reform of the education system, the number of graduating students increases every year, and more and more severe graduate＇ s employment, while more and more companies are unable to recruit talent. Resulting in difficult employment graduates there are many factors, the most important manifestations of contemporary graduates questioned the integrity of most enterprises, improve the status of today＇ s society difficult employment, increase the employment rate of graduates realize their own values of contemporary college students, meet the vital interests of the family, so that our talents and educational resources are fully utilized, so as to promote the healthy development of social harmony and stability as well as higher education. Social harmony and stability as well as for the healthy development of higher education, the vital interests of the students themselves and their families realize the value and so have certain theoretical and practical significance.
基金the State Science and Technology Programof Tackle Key Problemfor the tenth "Five-Year Plan" of China (2001BA601B02-02)
文摘This paper presents a review of the development of scientific research and practice of earthquake underground fluid in China during the last 40 years, summaries early constructive research and primary achievements in this field. The science of earthquake underground fluid is closely correlated with earthquake monitoring and prediction, such as innovations in observation techniques and theoretical methods, and analysis of diversified parameters and research into predictive methods. The historical evolution of observation networks for underground fluid indicates that the demand for strong earthquake monitoring and prediction has become the driving force of the construction and development of the observation network. The development of observation techniques represents the trend based on multiform measurement, syntheses, and digitization. The study results of underground fluid theory and precursory mechanisms suggest that the precursory model, numerical simuiation and in-door or field experimental research are the main technological approaches promoting innovation. Research results of earthquake forecast methods use physics based forecast techniques and the ideas of combination of usability and scientific advance. It has been proved by forecast practice that studying underground fluid is a very important subject in earthquake prediction on the Chinese mainland. Finally, the primary work and technical criterion on underground fluid are introduced, and some major scientific issues and development trends in different historical stages are summarized.
基金Supported by the National Natural Science Foundation of China(21306102 and21422604)China Postdoctoral Science Foundation(2015M571049)
文摘Gas fluidization has an ability to turn static particles to fluid-like dense flow, which allows greatly improved heat transfer among porous powders and highly efficient solid processing to become reality. As the rising star of current scientific research, some nanoparticles can also be fluidized in the form of agglomerates, with sizes ranging from tens to hundreds of microns. Herein, we have reviewed the recent progress on nanomaterial agglomeration and their fluidization behavior, the assisted techniques to enhance the fluidization of nanomaterials,including some mechanical measures, external fields and improved gas injections, as well as their effects on solid fluidization and mixing behaviors. Most of these techniques are effective in breaking large agglomerates and promoting particulate fluidization, meanwhile, the solid mixing is intensified under assisted fluidization. The applications of nanofluidization in nanostructured material production and sustainable chemical industry are further presented. In summary, the fluidization science of multidimensional, multicomponent and multifunctional particles, their multi-phase characterization, and the guideline of fluidized bed coupled process are prerequisites for the sustainable development of fluidized bed based materials, energy and chemical industry.
文摘Objectival. To prepare a radioimmunoguided surgery （RIGS） system including radio-nuclides hand- held gamma detecting probe （GDP） with signal processing control unit, specific monoclonal antibody （MAb）, technique of labeling as well as detection of ovarian carcinoma in nude mice bearing human ovari-an carcinoma. Metals. MAb COCl83B2, produced in our laboratory was used to prepare the F （ah’）2, fragment by ficin digestion. 99mTc labeling of COC183 B2-F（ab’）2, and normal mice IgG were prepared according to im- proved pretining method. GDP and control unit were made by Chinese Atomic Energy Research Institute. Different groups of nude mice bearing human ovarian carcinoma with ascites were administered with differ- ent dosages of 99mTo COCl83 B2-F（ab’）2, and their tissues measured by GDP in vivo and compared with gamma well counts after dissection in vitro. Results. 99mTc labeled COCl83B2-F（ab’）2, yielded a labeling rate of over 90%, and a good immunoac- tivity. The detections of carcinoma tissue by GDP showed a T/NT ratio of 2: 1 as positive for cancer. The smallest carcinoma detected was 0. 2cm × 0.1 cm and the nearest distance between carcinoma and normal tissue was 0. 2cm. Conclusions. The above studies proved that ficin can be used to digest MAbs with high yields and good immunoactivity of F（ab’）2. Our RIGS system with 99mTo labeled COC183 B2-F（ab’）2 and GDP can hope-fully be used clinically for ovarian carcinoma detection.
文摘Innovation systems principles are increasingly applied for putting agricultural research into use. This paper presents and analyses three such initiatives located in South Asia, with an aim to generate empirical evidence about practical aspects of the innovation process. These cases seem to suggest that the initial stages of innovation trajectory comprise of social engineering and creation of appropriate architecture of actors, after which need for new knowledge arises and favourable conditions develop for putting such knowledge into use. The cases also present how different types of agencies assume lead roles during different stages of innovation trajectory. The paper urges authorities from policy and practice to consider status of social architecture and the fact that different types of agencies play lead role in the innovation process before planning agricultural innovation initiatives.
