Let Hn be an orientable handlebody of genus n. It has been proved that for n not less than 2, there exists an annulus-busting curve in δHm. In the present paper, we prove that for n not less than 2, there exists an e...Let Hn be an orientable handlebody of genus n. It has been proved that for n not less than 2, there exists an annulus-busting curve in δHm. In the present paper, we prove that for n not less than 2, there exists an essential simple closed curve C in OHm which intersects each essential planar surface in Hn non-emptily. Furthermore, we show that for n not less than 3, a pants-busting curve must also be an annulus-busting curve.展开更多
Peripheral neuropathy constitutes a highly incidental condition and a major public health concern worldwide(Hanewinckel et al.,2016).This pathology is triggered by peripheral nervous system damage as a consequence of ...Peripheral neuropathy constitutes a highly incidental condition and a major public health concern worldwide(Hanewinckel et al.,2016).This pathology is triggered by peripheral nervous system damage as a consequence of systemic disease or ischemic-traumatic lesion.In the latter case,nerve crush,partial or total transection and stretch injury interrupt nerve conduction and impair sensitivity and motility of the innervated area,which brings about partial or total functional loss in the affected limb and disabling neuropathic pain.For these reasons,digging into the molecular mechanisms underlying peripheral neuropathy becomes essential for the development of successful therapeutic strategies.展开更多
that is homebound to villages and towns across the globe sent by relatives who have migrated in pursuit of greener pastures or refuge. These remittances to developing countries are expected to reach $516 billion in 20...that is homebound to villages and towns across the globe sent by relatives who have migrated in pursuit of greener pastures or refuge. These remittances to developing countries are expected to reach $516 billion in 2016, an increase from the $404 billion recorded in 2013, according to the International Monetary Fund （IMF）. Global remittances to Africa tripled from $19.5 billion in 2004 to $63.8 billion in 2014, according to the World Bank.展开更多
In accordance with a new policy issued by the Chinese Center for Disease Control and Prevention,since August 14,the data of confirmed cases of four categories of infectious diseases-namely,HIV/AIDS,Hepatitis B,Hepatit...In accordance with a new policy issued by the Chinese Center for Disease Control and Prevention,since August 14,the data of confirmed cases of four categories of infectious diseases-namely,HIV/AIDS,Hepatitis B,Hepatitis C and syphilis-have been linked to individuals’ID cards,in order to achieve real-time cross-regional tracking of these diseases nationwide.展开更多
China has become the largest cotton importing country in the world, while its own industry has atrophied With Chinese textiles widely sold around the world, raw cotton, has become the most salable agricultural product...China has become the largest cotton importing country in the world, while its own industry has atrophied With Chinese textiles widely sold around the world, raw cotton, has become the most salable agricultural product in China. Today, the country is the biggest cotton buyer in the world, and the United States has become the biggest supplier of cotton to China. According to U.S. official statistics, China imports half of展开更多
China’s Anti-Monopoly Law has been in effect for more than one year, but court, legislative and law enforcement efforts are still needed to clear up unfair
China’s first stock market and how it went belly up一百多年前中国茶馆里的股市风云It was a pleasant sunny morning with a chilly autumn breeze;over 20 men in deep blue robes and long braids sat down around a table in t...China’s first stock market and how it went belly up一百多年前中国茶馆里的股市风云It was a pleasant sunny morning with a chilly autumn breeze;over 20 men in deep blue robes and long braids sat down around a table in the Huifangrong Teahouse in the busiest corner of Foochow Road inside the ceded territories of Shanghai in 1881.All of them were anxious.展开更多
Coal bursting liability refers to the mechanical property of the degree and possibility of coal burst.The bursting liability is important to evaluate coal burst in mining.In this paper,the needle penetration test was ...Coal bursting liability refers to the mechanical property of the degree and possibility of coal burst.The bursting liability is important to evaluate coal burst in mining.In this paper,the needle penetration test was carried out to determinate the coal bursting liability,and the empirical criterion of coal bursting liability was proposed.Moreover,the machine learning method was applied to coal bursting liability determination.Through analyzing the elastic strain energy release and failure time,the residual elastic strain energy release rate index K_(RE)was proposed to evaluate the coal bursting liability.According to the relationship between needle penetration index(NPI),K_(RE)and the critical value of K_(RE),the Needle Penetration Test-based Empirical Classification Criterion(NPT-ECC)was obtained.In addition,four machine learning classification models were constructed.After training and testing of the models,Needle Penetration Test-based Machine Learning Classification Model(NPT-MLCM)was proposed.The research results show that the accuracy of NPT-ECC is 6.66%higher than that of China National Standard Comprehensive Evaluation(CNSCE)according to verification of the coal fragment ejection ratio F.Gridsearch cross validation-extreme gradient boosting(GSCV-XGBoost)has the best prediction performance among all the models,and accuracy,Macro-Precision,Macro-Recall and Macro-F1-score of which were 86.67%,88.97%,87.50%and 87.37%.Based on this,the Needle Penetration Test-based GSCV-XGBoost(NPT-GSCV-XGBoost)was proposed.After comparative analysis and discussion,NPT-GSCV-XGBoost is superior to NPT-ECC and CNSCE in the comprehensive prediction ability.展开更多
基金The grant (09XBKQ09) of Harbin Normal Universitythe NSF (11101058) of ChinaChina Postdoctoral Science Foundation (2011M500049)
文摘Let Hn be an orientable handlebody of genus n. It has been proved that for n not less than 2, there exists an annulus-busting curve in δHm. In the present paper, we prove that for n not less than 2, there exists an essential simple closed curve C in OHm which intersects each essential planar surface in Hn non-emptily. Furthermore, we show that for n not less than 3, a pants-busting curve must also be an annulus-busting curve.
基金supported by Universidad de Buenos Aires(UBACYT 20020100101017)CONICET,Ministerio de Ciencia,Tecnología e Innovación Productiva de la República Argentina(PIP 830 and PIP 567)
文摘Peripheral neuropathy constitutes a highly incidental condition and a major public health concern worldwide(Hanewinckel et al.,2016).This pathology is triggered by peripheral nervous system damage as a consequence of systemic disease or ischemic-traumatic lesion.In the latter case,nerve crush,partial or total transection and stretch injury interrupt nerve conduction and impair sensitivity and motility of the innervated area,which brings about partial or total functional loss in the affected limb and disabling neuropathic pain.For these reasons,digging into the molecular mechanisms underlying peripheral neuropathy becomes essential for the development of successful therapeutic strategies.
文摘that is homebound to villages and towns across the globe sent by relatives who have migrated in pursuit of greener pastures or refuge. These remittances to developing countries are expected to reach $516 billion in 2016, an increase from the $404 billion recorded in 2013, according to the International Monetary Fund （IMF）. Global remittances to Africa tripled from $19.5 billion in 2004 to $63.8 billion in 2014, according to the World Bank.
文摘In accordance with a new policy issued by the Chinese Center for Disease Control and Prevention,since August 14,the data of confirmed cases of four categories of infectious diseases-namely,HIV/AIDS,Hepatitis B,Hepatitis C and syphilis-have been linked to individuals’ID cards,in order to achieve real-time cross-regional tracking of these diseases nationwide.
文摘China has become the largest cotton importing country in the world, while its own industry has atrophied With Chinese textiles widely sold around the world, raw cotton, has become the most salable agricultural product in China. Today, the country is the biggest cotton buyer in the world, and the United States has become the biggest supplier of cotton to China. According to U.S. official statistics, China imports half of
文摘China’s Anti-Monopoly Law has been in effect for more than one year, but court, legislative and law enforcement efforts are still needed to clear up unfair
文摘China’s first stock market and how it went belly up一百多年前中国茶馆里的股市风云It was a pleasant sunny morning with a chilly autumn breeze;over 20 men in deep blue robes and long braids sat down around a table in the Huifangrong Teahouse in the busiest corner of Foochow Road inside the ceded territories of Shanghai in 1881.All of them were anxious.
基金supported by the National Natural Science Foundation of China(52225402 and U1910206).
文摘Coal bursting liability refers to the mechanical property of the degree and possibility of coal burst.The bursting liability is important to evaluate coal burst in mining.In this paper,the needle penetration test was carried out to determinate the coal bursting liability,and the empirical criterion of coal bursting liability was proposed.Moreover,the machine learning method was applied to coal bursting liability determination.Through analyzing the elastic strain energy release and failure time,the residual elastic strain energy release rate index K_(RE)was proposed to evaluate the coal bursting liability.According to the relationship between needle penetration index(NPI),K_(RE)and the critical value of K_(RE),the Needle Penetration Test-based Empirical Classification Criterion(NPT-ECC)was obtained.In addition,four machine learning classification models were constructed.After training and testing of the models,Needle Penetration Test-based Machine Learning Classification Model(NPT-MLCM)was proposed.The research results show that the accuracy of NPT-ECC is 6.66%higher than that of China National Standard Comprehensive Evaluation(CNSCE)according to verification of the coal fragment ejection ratio F.Gridsearch cross validation-extreme gradient boosting(GSCV-XGBoost)has the best prediction performance among all the models,and accuracy,Macro-Precision,Macro-Recall and Macro-F1-score of which were 86.67%,88.97%,87.50%and 87.37%.Based on this,the Needle Penetration Test-based GSCV-XGBoost(NPT-GSCV-XGBoost)was proposed.After comparative analysis and discussion,NPT-GSCV-XGBoost is superior to NPT-ECC and CNSCE in the comprehensive prediction ability.
