The of rural economic cooperatives plays a key role in the economic development of rural areas. The model of economic cooperatives can not only promote the better development of the local economy, but also provide tar...The of rural economic cooperatives plays a key role in the economic development of rural areas. The model of economic cooperatives can not only promote the better development of the local economy, but also provide targeted economic assistance to the local farmers. On the whole, the establishment of rural economic cooperatives plays a very strong role in promoting the construction of a new socialist countryside.In order to ensure the further development of rural economic cooperatives, we need to thoroughly solve the problems existing in the construction of rural economic cooperatives, so that cooperatives can not only continuously expand the scale and quantity, but also realize efficient operation and contribute to the development of rural economy.展开更多
Due to the restrictions on the conditions for afforestation and sand control,the development research,and application of sand barriers have accelerated in recent years,but some problems that cannot be ignored have eme...Due to the restrictions on the conditions for afforestation and sand control,the development research,and application of sand barriers have accelerated in recent years,but some problems that cannot be ignored have emerged in practice. In this paper,the functions of wind prevention,sand blocking and fixation,improving soil physical and chemical properties and increasing plant diversity of sand barriers,accretion coefficient and capacity between sand barriers,and mobile sand barriers were analyzed firstly,and then several issues that should be noted in the development and application of sand barriers were proposed. The results show that sand barriers can fix sand on the spot and maintain the stability of sand surface. As an auxiliary measure before afforestation on a mobile sand surface,they are practical and feasible. The biggest drawback of sand barriers is that they are easy to be saturated. Although they can increase plant diversity and surface roughness,they lose the function of blocking sand flow after being saturated,and their function of in-situ sand fixation also rapidly decreases with the degradation of sand barriers. Mobile sand barriers overcome the disadvantage of sand barriers being easy to be saturated to some extent,but the cost greatly increases. In terms of desertification prevention and control by plants,plants are used as sand barriers to study their functions of sand blocking and sand fixation in many researches and practices,but the more important ecological functions of adjusting temperature on sand surface and achieving surface thermodynamic equilibrium of plants are ignored.展开更多
1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of ...1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of traditional mineralogy,petrology,geochemistry and geophysics.It is not only an important and essential way and window to understand geological processes in depth and geological展开更多
Primary school education is an important part of laying a good foundation for students' growth and development. Therefore, in primary school mathematics teaching, teachers should help students to have good mathema...Primary school education is an important part of laying a good foundation for students' growth and development. Therefore, in primary school mathematics teaching, teachers should help students to have good mathematical thinking so as to realize students' healthy growth and all-round development. For this reason, teachers should pay attention to the effectiveness and pertinence of problem design in the actual primary mathematics teaching. Through the design of inquiry problems, students' learning desire can be stimulated, so as to improve the efficiency of classroom teaching and lay a good foundation for the realization of students' all-round development.展开更多
Objective: To expose the problems and inherent limitations of neuroscience-based brain research on mental disorders. Method: Discussion of the theory underlying brain research on mental disorders, followed by a system...Objective: To expose the problems and inherent limitations of neuroscience-based brain research on mental disorders. Method: Discussion of the theory underlying brain research on mental disorders, followed by a systematic evaluation of typical studies. Results: The fundamental problem is that brain researchers fail to differentiate between biological mental disorders in which brain processes cause the disorder (notably schizophrenia, bipolar disorder, and melancholic depression) and learned mental disorders in which brain processes mediate but do not cause the disorder (which is the case with reactive depression, reactive anxiety, OCD, and PTSD). Researchers have been unsuccessful in identifying mechanisms in the brain that cause biological mental disorders, and will never be able to locate the innumerable specific neural connections that mediate learned mental disorders. Moreover, the author’s review of typical studies in this field shows that they have serious problems with theory, measurement, and data analysis, and that their findings cannot be trusted. Conclusions: Neuroscience-based brain research on mental disorders, unlike other neurological research, has been an expensive failure and it is not worth continuing.展开更多
文摘The of rural economic cooperatives plays a key role in the economic development of rural areas. The model of economic cooperatives can not only promote the better development of the local economy, but also provide targeted economic assistance to the local farmers. On the whole, the establishment of rural economic cooperatives plays a very strong role in promoting the construction of a new socialist countryside.In order to ensure the further development of rural economic cooperatives, we need to thoroughly solve the problems existing in the construction of rural economic cooperatives, so that cooperatives can not only continuously expand the scale and quantity, but also realize efficient operation and contribute to the development of rural economy.
基金Supported by National Natural Science Foundation of China(41671528)
文摘Due to the restrictions on the conditions for afforestation and sand control,the development research,and application of sand barriers have accelerated in recent years,but some problems that cannot be ignored have emerged in practice. In this paper,the functions of wind prevention,sand blocking and fixation,improving soil physical and chemical properties and increasing plant diversity of sand barriers,accretion coefficient and capacity between sand barriers,and mobile sand barriers were analyzed firstly,and then several issues that should be noted in the development and application of sand barriers were proposed. The results show that sand barriers can fix sand on the spot and maintain the stability of sand surface. As an auxiliary measure before afforestation on a mobile sand surface,they are practical and feasible. The biggest drawback of sand barriers is that they are easy to be saturated. Although they can increase plant diversity and surface roughness,they lose the function of blocking sand flow after being saturated,and their function of in-situ sand fixation also rapidly decreases with the degradation of sand barriers. Mobile sand barriers overcome the disadvantage of sand barriers being easy to be saturated to some extent,but the cost greatly increases. In terms of desertification prevention and control by plants,plants are used as sand barriers to study their functions of sand blocking and sand fixation in many researches and practices,but the more important ecological functions of adjusting temperature on sand surface and achieving surface thermodynamic equilibrium of plants are ignored.
基金project was jointly funded by the Funds for the program of the National Natural Science Foundation (Noes. 41572060, U1133602)Projects of YM Lab (2011)Innovation Team of Yunnan province and KMUST (2008,2012)
文摘1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of traditional mineralogy,petrology,geochemistry and geophysics.It is not only an important and essential way and window to understand geological processes in depth and geological
文摘Primary school education is an important part of laying a good foundation for students' growth and development. Therefore, in primary school mathematics teaching, teachers should help students to have good mathematical thinking so as to realize students' healthy growth and all-round development. For this reason, teachers should pay attention to the effectiveness and pertinence of problem design in the actual primary mathematics teaching. Through the design of inquiry problems, students' learning desire can be stimulated, so as to improve the efficiency of classroom teaching and lay a good foundation for the realization of students' all-round development.
文摘Objective: To expose the problems and inherent limitations of neuroscience-based brain research on mental disorders. Method: Discussion of the theory underlying brain research on mental disorders, followed by a systematic evaluation of typical studies. Results: The fundamental problem is that brain researchers fail to differentiate between biological mental disorders in which brain processes cause the disorder (notably schizophrenia, bipolar disorder, and melancholic depression) and learned mental disorders in which brain processes mediate but do not cause the disorder (which is the case with reactive depression, reactive anxiety, OCD, and PTSD). Researchers have been unsuccessful in identifying mechanisms in the brain that cause biological mental disorders, and will never be able to locate the innumerable specific neural connections that mediate learned mental disorders. Moreover, the author’s review of typical studies in this field shows that they have serious problems with theory, measurement, and data analysis, and that their findings cannot be trusted. Conclusions: Neuroscience-based brain research on mental disorders, unlike other neurological research, has been an expensive failure and it is not worth continuing.
