[Objective] This paper aims to empirically analyze the situation of fertilizer overuse in China, considering that fertilizer, important for China＇s crop production, has brought serious environmental pollution to Chin...[Objective] This paper aims to empirically analyze the situation of fertilizer overuse in China, considering that fertilizer, important for China＇s crop production, has brought serious environmental pollution to China due to over application. [Method] Based on field survey data in four provinces of China, the magnitude of fertilizer overuse at farm level was empirically analyzed with Cobb-Douglas Produc- tion Function Method and profit optimization theory in the research. [Result] The resuits show that by average, 110.5 kg of chemical fertilizer were applied per mu of land, and 46.9 kg fertilizer was overused, occupying 42.5%. [Conclusion] There is large potential to reduce the overused amount and it is of great importance to re- duce fertilizer overuse effectively, which needs further intensive study.展开更多
It is argued that it has not yet been able to value the historical, philosophical and epistemological travail, represented by the filth and fourth centuries BC of the ancient Greek world, which preceded the highest sc...It is argued that it has not yet been able to value the historical, philosophical and epistemological travail, represented by the filth and fourth centuries BC of the ancient Greek world, which preceded the highest scientific heritage, represented by the so-called golden age of Euclid, Archimedes and Apollonius, Ⅲ-Ⅱ century BC. Well, it is believed that with our complex concept of tradition of thought within which we insert not only epistemological concepts but also philosophical principles, historical and social frameworks, in stasis or in strong movement, processed by us, it is possible better interpret that happy moment of scientific constructions of the third and second century BC, as a result of the valorization of the deep travail and serious battle that preceded it between the fourth and fifth century BC. It is investigated in particular in our paper the development of astronomical thought between the fifth and fourth centuries BC, in the ancient Greek thought, and at last a particular presumed criticism by Archimedes in his Sandreckoner to Aristarchus.展开更多
Although E Maddy （1997） says on naturalism： ＂This is not, in itself, a philosophy of mathematics [...]＂ （161）, already by its name, or by those whose interest has called on it （Quine, Putnam et al.） ... it an...Although E Maddy （1997） says on naturalism： ＂This is not, in itself, a philosophy of mathematics [...]＂ （161）, already by its name, or by those whose interest has called on it （Quine, Putnam et al.） ... it anyhow reveals desire to be it. Insofar as otherwise, the semantic potential of the word leaves far behind it （after all scarce） results it achieved from the relation of an exact （mathematical） expression and （overly rich） intuitive reality of Being. We plead here already from the perspective of the slogan ＂One and All＂ of the first philosopher： Tales, when by the number （which one forebodes） one could go to such an extent into areas of reality （Pythagoras）, or when （especially in the human sphere） is being over again actual final cause of Aristotle the philosophy and the mathematics to accomplish far more fruitful encounter with the Being. Alain Badiou （1988） has already pointed that： ＂Mathematics is ontology,＂ and the category theory in mathematics, having covered by itself other fields of this science, continues to find applications in a series of＂non-traditional＂ domains of reality. In that correlation the philosophy can express its （primary） needs for truth, justice, beauty, ... as well as for the overall development in the sense of purpose--also because of an undreamed power of the technological development （of hardwares and softwares） today. Namely, the naturalism in mathematics, which developed an abundant reflection on the place （importance of） the mathematical idiom in sciences--in the balance of criticism--has come rather to meager provisions, such as： ＂preestablished harmony of thinking,＂ ＂ontic commitment,＂ （Quine 1960） ＂the hygiene of mind,＂ （Maddy 1996） ＂success argument,＂ （Putnam 1975） ＂pragmatic argument,＂ （Resnik 1981） etc., which only are few places from the encounter of an exact expression such as is mathematical one and the reality of natuural sciences. Instead of philosophy of mathematics to radicalize its claims from the perspective of that （powerful） mathematical idiom and the excessive reality of Being and man＇s place in it--this time, in the spirit of biocosmology （neo-Aristotelism）.展开更多
Enteric viruses are the most common cause of acute gastroenteritis （AGE） in young children and a significant public health problem globally. Hospital admissions of children under 5 years of age with diarrhea are pri...Enteric viruses are the most common cause of acute gastroenteritis （AGE） in young children and a significant public health problem globally. Hospital admissions of children under 5 years of age with diarrhea are primarily associated with group A rotavirus （RVA） infection. In this retrospective study, the population structure of viruses linked to AGE etiology in young children hospitalized with AGE in Moscow was evaluated, and molecular characterization of RYA strains was performed. Fecal specimens were collected from children under 5 years old hospitalized with AGE between 2009 and 2014 in Moscow, Russia. Multiplex real-time reverse transcription PCR was used to detect enteric viruses and for G/[P]-genotyping of isolated RVAs. Sequencing of RVA VP7 and VP4 cDNA fragments was used to validate the data obtained by PCR- genotyping. The main causes for hospitalization of children with AGE were RVA （40.1%）, followed by noroviruses （11.4%）, while adenoviruses, astroviruses, sapoviruses, enteroviruses, and orthoreoviruses were detected in 4.7%, 1.9%, 1.4%, 1.2%, and 0.2% of samples tested, respectively. Nosocomial infections, predominantly associated with RVAs and noroviruses, were detected in 24.8% of cases and occurred significantly more frequently in younger infants. The predominant RVA genotype was G4P[8], detected in 38.7% of RVA-positive cases, whereas genotypes G1P[8], G9P[8], G3P[8], and G2P[4] were found in 11.8%, 6.6%, 4.2%, and 3.3% of cases, respectively. Together, the presence of circulating RVA strains with rare VP7 and VP4 gene variants （G6 and P[9]） highlights the need to conduct continuous epidemiological monitoring of RVA infection.展开更多
文摘[Objective] This paper aims to empirically analyze the situation of fertilizer overuse in China, considering that fertilizer, important for China＇s crop production, has brought serious environmental pollution to China due to over application. [Method] Based on field survey data in four provinces of China, the magnitude of fertilizer overuse at farm level was empirically analyzed with Cobb-Douglas Produc- tion Function Method and profit optimization theory in the research. [Result] The resuits show that by average, 110.5 kg of chemical fertilizer were applied per mu of land, and 46.9 kg fertilizer was overused, occupying 42.5%. [Conclusion] There is large potential to reduce the overused amount and it is of great importance to re- duce fertilizer overuse effectively, which needs further intensive study.
文摘It is argued that it has not yet been able to value the historical, philosophical and epistemological travail, represented by the filth and fourth centuries BC of the ancient Greek world, which preceded the highest scientific heritage, represented by the so-called golden age of Euclid, Archimedes and Apollonius, Ⅲ-Ⅱ century BC. Well, it is believed that with our complex concept of tradition of thought within which we insert not only epistemological concepts but also philosophical principles, historical and social frameworks, in stasis or in strong movement, processed by us, it is possible better interpret that happy moment of scientific constructions of the third and second century BC, as a result of the valorization of the deep travail and serious battle that preceded it between the fourth and fifth century BC. It is investigated in particular in our paper the development of astronomical thought between the fifth and fourth centuries BC, in the ancient Greek thought, and at last a particular presumed criticism by Archimedes in his Sandreckoner to Aristarchus.
文摘Although E Maddy （1997） says on naturalism： ＂This is not, in itself, a philosophy of mathematics [...]＂ （161）, already by its name, or by those whose interest has called on it （Quine, Putnam et al.） ... it anyhow reveals desire to be it. Insofar as otherwise, the semantic potential of the word leaves far behind it （after all scarce） results it achieved from the relation of an exact （mathematical） expression and （overly rich） intuitive reality of Being. We plead here already from the perspective of the slogan ＂One and All＂ of the first philosopher： Tales, when by the number （which one forebodes） one could go to such an extent into areas of reality （Pythagoras）, or when （especially in the human sphere） is being over again actual final cause of Aristotle the philosophy and the mathematics to accomplish far more fruitful encounter with the Being. Alain Badiou （1988） has already pointed that： ＂Mathematics is ontology,＂ and the category theory in mathematics, having covered by itself other fields of this science, continues to find applications in a series of＂non-traditional＂ domains of reality. In that correlation the philosophy can express its （primary） needs for truth, justice, beauty, ... as well as for the overall development in the sense of purpose--also because of an undreamed power of the technological development （of hardwares and softwares） today. Namely, the naturalism in mathematics, which developed an abundant reflection on the place （importance of） the mathematical idiom in sciences--in the balance of criticism--has come rather to meager provisions, such as： ＂preestablished harmony of thinking,＂ ＂ontic commitment,＂ （Quine 1960） ＂the hygiene of mind,＂ （Maddy 1996） ＂success argument,＂ （Putnam 1975） ＂pragmatic argument,＂ （Resnik 1981） etc., which only are few places from the encounter of an exact expression such as is mathematical one and the reality of natuural sciences. Instead of philosophy of mathematics to radicalize its claims from the perspective of that （powerful） mathematical idiom and the excessive reality of Being and man＇s place in it--this time, in the spirit of biocosmology （neo-Aristotelism）.
基金RVA G/[P]-genotypes was at the expense of the Russian Science Foundation(Grant No.16-15-10332)
文摘Enteric viruses are the most common cause of acute gastroenteritis （AGE） in young children and a significant public health problem globally. Hospital admissions of children under 5 years of age with diarrhea are primarily associated with group A rotavirus （RVA） infection. In this retrospective study, the population structure of viruses linked to AGE etiology in young children hospitalized with AGE in Moscow was evaluated, and molecular characterization of RYA strains was performed. Fecal specimens were collected from children under 5 years old hospitalized with AGE between 2009 and 2014 in Moscow, Russia. Multiplex real-time reverse transcription PCR was used to detect enteric viruses and for G/[P]-genotyping of isolated RVAs. Sequencing of RVA VP7 and VP4 cDNA fragments was used to validate the data obtained by PCR- genotyping. The main causes for hospitalization of children with AGE were RVA （40.1%）, followed by noroviruses （11.4%）, while adenoviruses, astroviruses, sapoviruses, enteroviruses, and orthoreoviruses were detected in 4.7%, 1.9%, 1.4%, 1.2%, and 0.2% of samples tested, respectively. Nosocomial infections, predominantly associated with RVAs and noroviruses, were detected in 24.8% of cases and occurred significantly more frequently in younger infants. The predominant RVA genotype was G4P[8], detected in 38.7% of RVA-positive cases, whereas genotypes G1P[8], G9P[8], G3P[8], and G2P[4] were found in 11.8%, 6.6%, 4.2%, and 3.3% of cases, respectively. Together, the presence of circulating RVA strains with rare VP7 and VP4 gene variants （G6 and P[9]） highlights the need to conduct continuous epidemiological monitoring of RVA infection.
