Numerical modeling of three cases(Fuka Mine,Okayama;Shouda Mine,Okayama;Tokiwa Mine,Fukushima)of mining in Japan using FLAC(fast Lagrangian analysis of continua)is introduced to evaluate the stability of hilltop excav...Numerical modeling of three cases(Fuka Mine,Okayama;Shouda Mine,Okayama;Tokiwa Mine,Fukushima)of mining in Japan using FLAC(fast Lagrangian analysis of continua)is introduced to evaluate the stability of hilltop excavation.Ubiquitous joint model is adopted to account for the presence of weak planes,such as weathering joints,bedding planes,in FLAC Mohr-Coulomb mode.By studying the distribution of stress,displacement and safety factor,the stability of excavation can be evaluated and new suggestions based on the numerical modeling process can be presented.Further consideration and methodology of the numerical modeling method are also discussed.展开更多
Water is very important for the growth of Gastrodia elata. The lack of water from January to June will lead to the insufficient ability of Armillaria mellea to provide nutrition, the bending and downward growth of see...Water is very important for the growth of Gastrodia elata. The lack of water from January to June will lead to the insufficient ability of Armillaria mellea to provide nutrition, the bending and downward growth of seeds, the delay of entering the tuber expansion period and the shortening of nutritional storage time. From July to September, too much rain is easy to combine with high temperature, and Gastrodia elata rot increases. The sudden change of temperature will cause the cell tissue of Gastrodia elata to be damaged and rot. The yellow mud matrix rots 26.5 per m2, fresh gastrodia elata 6.2kg, and the drying rate is 17.5%;the average yield of fresh gastrodia elata cultivated in river sand is 7.5kg, the drying rate is 19.5%, and 11.5 rot. In the rapid expansion stage of tubers, more water is needed to provide sufficient nutrition for Gastrodia elata. Too much water during nutrient storage will cause Gastrodia elata rot. To cultivate Gastrodia elata, we must choose the substrate with good permeability, and cover it with thin soil and thick covering after planting. In the early stage, while maintaining moisture, we should pay attention to trenching and drainage in the rainy season in order to ensure the yield of Gastrodia elata.展开更多
As an important part of the national economy, the real estate economy fluctuations have a certain impact on the national economy and trigger a chain reaction, causing industrial and regional financial risks. As the re...As an important part of the national economy, the real estate economy fluctuations have a certain impact on the national economy and trigger a chain reaction, causing industrial and regional financial risks. As the real estate economic and financial risk has the characteristics of uncertainty, correlation, high leverage and infectivity, once it occurs, it may form a domino effect, threatening the development of the whole national economy. China's real estate economy has ended the golden age of the past. Under the background of the new normal of the economy, the real estate economy is facing the complicated market environment at home and abroad, which increases the financial risks of real estate enterprises. The country pays more and more attention to the financial management of real estate. Through the analysis of real estate economic fluctuation factors and financial risks, it is of great significance to further improve China's real estate economic laws and regulations, supervision and management system, innovation of financial products and other aspects.展开更多
At this special time of the world, under the background of countries are coping with the economic downturn together, vigorously promoting the development of digital economy, expanding the openness of service areas, an...At this special time of the world, under the background of countries are coping with the economic downturn together, vigorously promoting the development of digital economy, expanding the openness of service areas, and promoting the reform of financial industry will provide new impetus for the economic development of a country and a region. Through the continuous upgrading of information tools such as network infrastructure and smart phones, and the superposition of information technologies such as Internet cloud computing, block chain and Internet of Things, the digital economy enables people to continuously improve the quantity, quality and computing speed of big data processing and promote the transformation of social-economic formation from industrial economy to information economy, and from knowledge economy to intelligent economy. So as to reduce the transaction cost of the whole society, improve the efficiency of the optimal allocation of resources, improve the additional value of products, enterprises and services, promote the rapid development of productivity, and provide technical standards and benchmarking effect for the transcendental development of backward countries.展开更多
Different configurations for the monochroma-tor crystals and the analyzer crystals have been used in hard X-ray diffraction enhanced imaging (DEI) methods to over-come the complex task to adjust each of them to the id...Different configurations for the monochroma-tor crystals and the analyzer crystals have been used in hard X-ray diffraction enhanced imaging (DEI) methods to over-come the complex task to adjust each of them to the ideal position. Here we present a very compact DEI configuration, and preliminary results of experiments performed at the Beijing Synchrotron Radiation Facility (BSRF) using only two crystals: the first one acting as monochromator and the second one as analyzer in the Bragg geometry. Refraction contrast images characterized by high contrast and spatial resolution are obtained and compared with absorption im-ages. Differences among these images will be outlined and discussed emphasizing the potential capabilities of this very simple layout that guarantees a high transmission efficiency.展开更多
Let G be a semitopological semigroup. Let C be a nonempty subset of a Hilbert space and J ={T t:t∈G} be a representation of G as asymptotically nonexpansive type mappings of C into itself such ...Let G be a semitopological semigroup. Let C be a nonempty subset of a Hilbert space and J ={T t:t∈G} be a representation of G as asymptotically nonexpansive type mappings of C into itself such that the common fixed point set F(J) of J in C is nonempty. It is proved that ∩s∈G co {T ts x:t∈G}∩F(J) is nonempty for each x ∈ C if and only if there exists a nonexpansive retraction P of C onto F(J) such that PT s=T sP=P for all s∈G and P(x) is in the closed convex hull of {T sx:s∈G}, x∈C . This result shows that many key conditions in [1-4, 9, 12-15 ] are not necessary.展开更多
文摘Numerical modeling of three cases(Fuka Mine,Okayama;Shouda Mine,Okayama;Tokiwa Mine,Fukushima)of mining in Japan using FLAC(fast Lagrangian analysis of continua)is introduced to evaluate the stability of hilltop excavation.Ubiquitous joint model is adopted to account for the presence of weak planes,such as weathering joints,bedding planes,in FLAC Mohr-Coulomb mode.By studying the distribution of stress,displacement and safety factor,the stability of excavation can be evaluated and new suggestions based on the numerical modeling process can be presented.Further consideration and methodology of the numerical modeling method are also discussed.
文摘Water is very important for the growth of Gastrodia elata. The lack of water from January to June will lead to the insufficient ability of Armillaria mellea to provide nutrition, the bending and downward growth of seeds, the delay of entering the tuber expansion period and the shortening of nutritional storage time. From July to September, too much rain is easy to combine with high temperature, and Gastrodia elata rot increases. The sudden change of temperature will cause the cell tissue of Gastrodia elata to be damaged and rot. The yellow mud matrix rots 26.5 per m2, fresh gastrodia elata 6.2kg, and the drying rate is 17.5%;the average yield of fresh gastrodia elata cultivated in river sand is 7.5kg, the drying rate is 19.5%, and 11.5 rot. In the rapid expansion stage of tubers, more water is needed to provide sufficient nutrition for Gastrodia elata. Too much water during nutrient storage will cause Gastrodia elata rot. To cultivate Gastrodia elata, we must choose the substrate with good permeability, and cover it with thin soil and thick covering after planting. In the early stage, while maintaining moisture, we should pay attention to trenching and drainage in the rainy season in order to ensure the yield of Gastrodia elata.
文摘As an important part of the national economy, the real estate economy fluctuations have a certain impact on the national economy and trigger a chain reaction, causing industrial and regional financial risks. As the real estate economic and financial risk has the characteristics of uncertainty, correlation, high leverage and infectivity, once it occurs, it may form a domino effect, threatening the development of the whole national economy. China's real estate economy has ended the golden age of the past. Under the background of the new normal of the economy, the real estate economy is facing the complicated market environment at home and abroad, which increases the financial risks of real estate enterprises. The country pays more and more attention to the financial management of real estate. Through the analysis of real estate economic fluctuation factors and financial risks, it is of great significance to further improve China's real estate economic laws and regulations, supervision and management system, innovation of financial products and other aspects.
文摘At this special time of the world, under the background of countries are coping with the economic downturn together, vigorously promoting the development of digital economy, expanding the openness of service areas, and promoting the reform of financial industry will provide new impetus for the economic development of a country and a region. Through the continuous upgrading of information tools such as network infrastructure and smart phones, and the superposition of information technologies such as Internet cloud computing, block chain and Internet of Things, the digital economy enables people to continuously improve the quantity, quality and computing speed of big data processing and promote the transformation of social-economic formation from industrial economy to information economy, and from knowledge economy to intelligent economy. So as to reduce the transaction cost of the whole society, improve the efficiency of the optimal allocation of resources, improve the additional value of products, enterprises and services, promote the rapid development of productivity, and provide technical standards and benchmarking effect for the transcendental development of backward countries.
文摘Different configurations for the monochroma-tor crystals and the analyzer crystals have been used in hard X-ray diffraction enhanced imaging (DEI) methods to over-come the complex task to adjust each of them to the ideal position. Here we present a very compact DEI configuration, and preliminary results of experiments performed at the Beijing Synchrotron Radiation Facility (BSRF) using only two crystals: the first one acting as monochromator and the second one as analyzer in the Bragg geometry. Refraction contrast images characterized by high contrast and spatial resolution are obtained and compared with absorption im-ages. Differences among these images will be outlined and discussed emphasizing the potential capabilities of this very simple layout that guarantees a high transmission efficiency.
文摘Let G be a semitopological semigroup. Let C be a nonempty subset of a Hilbert space and J ={T t:t∈G} be a representation of G as asymptotically nonexpansive type mappings of C into itself such that the common fixed point set F(J) of J in C is nonempty. It is proved that ∩s∈G co {T ts x:t∈G}∩F(J) is nonempty for each x ∈ C if and only if there exists a nonexpansive retraction P of C onto F(J) such that PT s=T sP=P for all s∈G and P(x) is in the closed convex hull of {T sx:s∈G}, x∈C . This result shows that many key conditions in [1-4, 9, 12-15 ] are not necessary.
