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
Although momentum strategies result in abnormal profitability,thereby challenging the efficient market hypothesis(EMH),concerns persist regarding their reliability due to their significant volatility and susceptibilit...Although momentum strategies result in abnormal profitability,thereby challenging the efficient market hypothesis(EMH),concerns persist regarding their reliability due to their significant volatility and susceptibility to substantial losses.In this study,we investigate the limitations of these strategies and propose a solution.Our literature review reveals that the volatile profits are due to statistical analyses that assume the persistence of past patterns,leading to unreliable results in out-of-sample scenarios when underlying mechanisms evolve.Statistical analysis,the predominant method in financial economics,often proves inadequate in explaining market fluctuations and predicting crashes.To overcome these limitations,a paradigm shift towards dynamic approaches is essential.Drawing inspiration from three groundbreaking economists,we introduce the extended Samuelson model(ESM),a dynamic model that connects price changes to market participant actions.This paradigm transition uncovers several significant findings.First,timely signals indicate momentum initiations,cessations,and reversals,validated using S&P 500 data from 1999 to 2023.Second,ESM predicts the 1987 Black Monday crash weeks in advance,offering a new perspective on its underlying cause.Third,we classify sequential stock price data into eight distinct market states,including their thresholds for transitions,laying the groundwork for market trend predictions and risk assessments.Fourth,the ESM is shown to be a compelling alternative to EMH,offering potent explanatory and predictive power based on a single,realistic assumption.Our findings suggest that ESM has the potential to provide policymakers with proactive tools,enabling financial institutions to enhance their risk assessment and management strategies.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.
文摘Although momentum strategies result in abnormal profitability,thereby challenging the efficient market hypothesis(EMH),concerns persist regarding their reliability due to their significant volatility and susceptibility to substantial losses.In this study,we investigate the limitations of these strategies and propose a solution.Our literature review reveals that the volatile profits are due to statistical analyses that assume the persistence of past patterns,leading to unreliable results in out-of-sample scenarios when underlying mechanisms evolve.Statistical analysis,the predominant method in financial economics,often proves inadequate in explaining market fluctuations and predicting crashes.To overcome these limitations,a paradigm shift towards dynamic approaches is essential.Drawing inspiration from three groundbreaking economists,we introduce the extended Samuelson model(ESM),a dynamic model that connects price changes to market participant actions.This paradigm transition uncovers several significant findings.First,timely signals indicate momentum initiations,cessations,and reversals,validated using S&P 500 data from 1999 to 2023.Second,ESM predicts the 1987 Black Monday crash weeks in advance,offering a new perspective on its underlying cause.Third,we classify sequential stock price data into eight distinct market states,including their thresholds for transitions,laying the groundwork for market trend predictions and risk assessments.Fourth,the ESM is shown to be a compelling alternative to EMH,offering potent explanatory and predictive power based on a single,realistic assumption.Our findings suggest that ESM has the potential to provide policymakers with proactive tools,enabling financial institutions to enhance their risk assessment and management strategies.
