This paper focuses on optimally determining the existence of connected paths between some given nodes in random ring-based graphs.Serving as a fundamental underlying structure in network modeling,ring topology appears...This paper focuses on optimally determining the existence of connected paths between some given nodes in random ring-based graphs.Serving as a fundamental underlying structure in network modeling,ring topology appears as commonplace in many realistic scenarios.Regarding this,we consider graphs composed of rings,with some possible connected paths between them.Without prior knowledge of the exact node permutations on rings,the existence of each edge can be unraveled through edge testing at a unit cost in one step.The problem examined is that of determining whether the given nodes are connected by a path or separated by a cut,with the minimum expected costs involved.Dividing the problem into different cases based on different topologies of the ring-based networks,we propose the corresponding policies that aim to quickly seek the paths between nodes.A common feature shared by all those policies is that we stick to going in the same direction during edge searching,with edge testing in each step only involving the test between the source and the node that has been tested most.The simple searching rule,interestingly,can be interpreted as a delightful property stemming from the neat structure of ring-based networks,which makes the searching process not rely on any sophisticated behaviors.We prove the optimality of the proposed policies by calculating the expected cost incurred and making a comparison with the other class of strategies.The effectiveness of the proposed policies is also verified through extensive simulations,from which we even disclose three extra intriguing findings:i)in a onering network,the cost will grow drastically with the number of designated nodes when the number is small and will grow slightly when that number is large;ii)in ring-based network,Depth First is optimal in detecting the connectivity between designated nodes;iii)the problem of multi-ring networks shares large similarity with that of two-ring networks,and a larger number of ties between rings will not influence the expected cost.展开更多
China will sever the link bet ween produce prices and government subsidies to build price mechanism that benefits both both customers and farmers,China’s top economic planner said.
The importance of detecting heteroscedasticity in regression analysis is widely recognized because efficient inference for the regression function requires that heteroscedasticity should be taken into account. In this...The importance of detecting heteroscedasticity in regression analysis is widely recognized because efficient inference for the regression function requires that heteroscedasticity should be taken into account. In this paper, a simple test for heteroscedasticity is proposed in nonparametric regression based on residual analysis. Furthermore, some simulations with a comparison with Dette and Munk＇s method are conducted to evaluate the performance of the proposed test. The results demonstrate that the method in this paper performs quite satisfactorily and is much more powerful than Dette and Munk＇s method in some cases.展开更多
In the early 1990s, the United States became the world＇s only superpower and launched multiple wars in the Islamic world, only to find its power weakened and its global hegemony and influence declining over time. The...In the early 1990s, the United States became the world＇s only superpower and launched multiple wars in the Islamic world, only to find its power weakened and its global hegemony and influence declining over time. The gap between Chinese and American economic power has been narrowing, and the cooperation between the two countries has made a positive contribution to regional and world peace.展开更多
The American and British war against Iraq started on March 20, 2003 not only caused heavy casualties and ecological environmental disasters but also exerted impact on regional and world security, stability and develop...The American and British war against Iraq started on March 20, 2003 not only caused heavy casualties and ecological environmental disasters but also exerted impact on regional and world security, stability and development. Even so the war is a local war, and it is unlikely.展开更多
Henan Provincial Federation of Respecting and Helping the Elderly was established in Zhengzhou on February 26,2012. On the same day,a donation ceremony was held as well.As of today,the federation has received donation...Henan Provincial Federation of Respecting and Helping the Elderly was established in Zhengzhou on February 26,2012. On the same day,a donation ceremony was held as well.As of today,the federation has received donation of RMB 130 million,which will be展开更多
The Eighth National Members' Assembly of China Family Planning Association(CFPA)was held in Beijing on May 18,2016,Xi Jinping,President of People's Republic of China and General Secretary of the Central Commit...The Eighth National Members' Assembly of China Family Planning Association(CFPA)was held in Beijing on May 18,2016,Xi Jinping,President of People's Republic of China and General Secretary of the Central Committee of Communist Party of China(CPC),said that China must adhere to the basic national policies of family planning for a long term.展开更多
In today＇s world, globalization and regionalization are two parallel trends, playing critical roles in the development and evolution ofworld economy. The WTO＇s Doha Round negotiations were stalled in the past ten ye...In today＇s world, globalization and regionalization are two parallel trends, playing critical roles in the development and evolution ofworld economy. The WTO＇s Doha Round negotiations were stalled in the past ten years, and the regional cooperation became a suboptimal choice. During this period, the integration process in Latin America and the Caribbean also gained momentum.展开更多
China’s central bank sticks to prudent monetary policy China will continue its prudent monetary policy,flexibly use monetary instruments and maintain"moderate"liquidity to achieve reasonable growth in loans...China’s central bank sticks to prudent monetary policy China will continue its prudent monetary policy,flexibly use monetary instruments and maintain"moderate"liquidity to achieve reasonable growth in loans and social financing,the central bank said.展开更多
China’s economy showed strong resilience in the first half of 2014,with growth momentum rebounding in the second quarter and expansion in the first six months reaching 7.4 percent year on year.Helped by an export rec...China’s economy showed strong resilience in the first half of 2014,with growth momentum rebounding in the second quarter and expansion in the first six months reaching 7.4 percent year on year.Helped by an export recovery since April,and new sources of growth emerging from the structural adjustment,expansion accelerated to7.5 percent in the second quarter展开更多
HIGH-SPEED trains have made our family members feel closer,as if we live in the same city,"said Zhang Huafu,who works in Shangrao City,Jiangxi Province,while his parents and brothers live in Fujian Province.Thoug...HIGH-SPEED trains have made our family members feel closer,as if we live in the same city,"said Zhang Huafu,who works in Shangrao City,Jiangxi Province,while his parents and brothers live in Fujian Province.Though the two provinces are adjacent,the mountainous terrain makes the transport quite time-展开更多
China’s Vice Minister of Science and Technology Zhang Laiwu stressed the need to reshape the country’s seed industry through commercial and innovative elements.China’s seed industry is still weak and related enterp...China’s Vice Minister of Science and Technology Zhang Laiwu stressed the need to reshape the country’s seed industry through commercial and innovative elements.China’s seed industry is still weak and related enterprises are small and poorly organized,Zhang said at a press conference hosted by展开更多
China＇s economic growth has started to stabilize and shown positive changes, said a statement released after a State Council meeting presided over by Premier Wen Jiabao on Oct. 17.
Chinese authorities issued its first policy document for 2012, underscoring the importance of scientific and technological innovation for sustained agricultural growth.To ensure an effective supply of agricultural pro...Chinese authorities issued its first policy document for 2012, underscoring the importance of scientific and technological innovation for sustained agricultural growth.To ensure an effective supply of agricultural products is vital to the country’s overall and strategic development amid the complicated global economic situation, deepening influence展开更多
China is keen to accelerate technology innovation and scientific research in agriculture, a move to boost the country’s modern agricultural development, a central government statement said on Feb. 1.China will intens...China is keen to accelerate technology innovation and scientific research in agriculture, a move to boost the country’s modern agricultural development, a central government statement said on Feb. 1.China will intensify efforts to encourage development of both frontier agricultural technologies and展开更多
Arable land contaminated by heavy metals across China will be withdrawn from ag-ricultural production,said a senior Chinese agricultural official.Agricultural land with high levels of heavy metals will no longer be us...Arable land contaminated by heavy metals across China will be withdrawn from ag-ricultural production,said a senior Chinese agricultural official.Agricultural land with high levels of heavy metals will no longer be used,said Chen Xiwen,deputy director of the central agricultural work leading team,the top agriculture authority.Farmland near river sources,es-展开更多
Chinese authorities issued their first policy document of 2014,underscoring the importance of rural reform,developing modern agriculture and maintaining agriculture as the founda-tion of its economy."Rural reform...Chinese authorities issued their first policy document of 2014,underscoring the importance of rural reform,developing modern agriculture and maintaining agriculture as the founda-tion of its economy."Rural reform and development are confronted with a more complicated environment and an increasing展开更多
As half of this year has passed, the macroeconomic conditions in the first five months and the statistics of several benchmarking industries showed that the Chi nese economic recovery has gained fresh momentum.
China is launching its greatest initiative against the recurrent food safety issue, one of the most determined efforts China has exercised in dealing with the public concerned food safety issue ever. China is launchin...China is launching its greatest initiative against the recurrent food safety issue, one of the most determined efforts China has exercised in dealing with the public concerned food safety issue ever. China is launching its greatest initiative against the recurrent food safety issue, one of the most determined efforts China has exercised in dealing with the public concerned food safety issue ever.展开更多
IN April 2018,China announced the plan to build Hainan Province into a pilot free trade zone,gradually exploring and steadily promoting the establishment of a free trade port with Chinese characteristics.While embraci...IN April 2018,China announced the plan to build Hainan Province into a pilot free trade zone,gradually exploring and steadily promoting the establishment of a free trade port with Chinese characteristics.While embracing its new mission,the largest special economic zone in China welcomed historic opportunities.Since then,Hainan,has been advancing reforms revolved around institutional innovation,keeping itself aligned with international economic and trade rules,and taking initiative in opening more sectors to foreign investors.展开更多
基金supported by NSF China(No.61960206002,62020106005,42050105,62061146002)Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University。
文摘This paper focuses on optimally determining the existence of connected paths between some given nodes in random ring-based graphs.Serving as a fundamental underlying structure in network modeling,ring topology appears as commonplace in many realistic scenarios.Regarding this,we consider graphs composed of rings,with some possible connected paths between them.Without prior knowledge of the exact node permutations on rings,the existence of each edge can be unraveled through edge testing at a unit cost in one step.The problem examined is that of determining whether the given nodes are connected by a path or separated by a cut,with the minimum expected costs involved.Dividing the problem into different cases based on different topologies of the ring-based networks,we propose the corresponding policies that aim to quickly seek the paths between nodes.A common feature shared by all those policies is that we stick to going in the same direction during edge searching,with edge testing in each step only involving the test between the source and the node that has been tested most.The simple searching rule,interestingly,can be interpreted as a delightful property stemming from the neat structure of ring-based networks,which makes the searching process not rely on any sophisticated behaviors.We prove the optimality of the proposed policies by calculating the expected cost incurred and making a comparison with the other class of strategies.The effectiveness of the proposed policies is also verified through extensive simulations,from which we even disclose three extra intriguing findings:i)in a onering network,the cost will grow drastically with the number of designated nodes when the number is small and will grow slightly when that number is large;ii)in ring-based network,Depth First is optimal in detecting the connectivity between designated nodes;iii)the problem of multi-ring networks shares large similarity with that of two-ring networks,and a larger number of ties between rings will not influence the expected cost.
文摘China will sever the link bet ween produce prices and government subsidies to build price mechanism that benefits both both customers and farmers,China’s top economic planner said.
基金the National Natural Science Foundation of China (10531030)
文摘The importance of detecting heteroscedasticity in regression analysis is widely recognized because efficient inference for the regression function requires that heteroscedasticity should be taken into account. In this paper, a simple test for heteroscedasticity is proposed in nonparametric regression based on residual analysis. Furthermore, some simulations with a comparison with Dette and Munk＇s method are conducted to evaluate the performance of the proposed test. The results demonstrate that the method in this paper performs quite satisfactorily and is much more powerful than Dette and Munk＇s method in some cases.
文摘In the early 1990s, the United States became the world＇s only superpower and launched multiple wars in the Islamic world, only to find its power weakened and its global hegemony and influence declining over time. The gap between Chinese and American economic power has been narrowing, and the cooperation between the two countries has made a positive contribution to regional and world peace.
文摘The American and British war against Iraq started on March 20, 2003 not only caused heavy casualties and ecological environmental disasters but also exerted impact on regional and world security, stability and development. Even so the war is a local war, and it is unlikely.
文摘Henan Provincial Federation of Respecting and Helping the Elderly was established in Zhengzhou on February 26,2012. On the same day,a donation ceremony was held as well.As of today,the federation has received donation of RMB 130 million,which will be
文摘The Eighth National Members' Assembly of China Family Planning Association(CFPA)was held in Beijing on May 18,2016,Xi Jinping,President of People's Republic of China and General Secretary of the Central Committee of Communist Party of China(CPC),said that China must adhere to the basic national policies of family planning for a long term.
文摘In today＇s world, globalization and regionalization are two parallel trends, playing critical roles in the development and evolution ofworld economy. The WTO＇s Doha Round negotiations were stalled in the past ten years, and the regional cooperation became a suboptimal choice. During this period, the integration process in Latin America and the Caribbean also gained momentum.
文摘China’s central bank sticks to prudent monetary policy China will continue its prudent monetary policy,flexibly use monetary instruments and maintain"moderate"liquidity to achieve reasonable growth in loans and social financing,the central bank said.
文摘China’s economy showed strong resilience in the first half of 2014,with growth momentum rebounding in the second quarter and expansion in the first six months reaching 7.4 percent year on year.Helped by an export recovery since April,and new sources of growth emerging from the structural adjustment,expansion accelerated to7.5 percent in the second quarter
文摘HIGH-SPEED trains have made our family members feel closer,as if we live in the same city,"said Zhang Huafu,who works in Shangrao City,Jiangxi Province,while his parents and brothers live in Fujian Province.Though the two provinces are adjacent,the mountainous terrain makes the transport quite time-
文摘China’s Vice Minister of Science and Technology Zhang Laiwu stressed the need to reshape the country’s seed industry through commercial and innovative elements.China’s seed industry is still weak and related enterprises are small and poorly organized,Zhang said at a press conference hosted by
文摘China＇s economic growth has started to stabilize and shown positive changes, said a statement released after a State Council meeting presided over by Premier Wen Jiabao on Oct. 17.
文摘Chinese authorities issued its first policy document for 2012, underscoring the importance of scientific and technological innovation for sustained agricultural growth.To ensure an effective supply of agricultural products is vital to the country’s overall and strategic development amid the complicated global economic situation, deepening influence
文摘China is keen to accelerate technology innovation and scientific research in agriculture, a move to boost the country’s modern agricultural development, a central government statement said on Feb. 1.China will intensify efforts to encourage development of both frontier agricultural technologies and
文摘Arable land contaminated by heavy metals across China will be withdrawn from ag-ricultural production,said a senior Chinese agricultural official.Agricultural land with high levels of heavy metals will no longer be used,said Chen Xiwen,deputy director of the central agricultural work leading team,the top agriculture authority.Farmland near river sources,es-
文摘Chinese authorities issued their first policy document of 2014,underscoring the importance of rural reform,developing modern agriculture and maintaining agriculture as the founda-tion of its economy."Rural reform and development are confronted with a more complicated environment and an increasing
文摘As half of this year has passed, the macroeconomic conditions in the first five months and the statistics of several benchmarking industries showed that the Chi nese economic recovery has gained fresh momentum.
文摘China is launching its greatest initiative against the recurrent food safety issue, one of the most determined efforts China has exercised in dealing with the public concerned food safety issue ever. China is launching its greatest initiative against the recurrent food safety issue, one of the most determined efforts China has exercised in dealing with the public concerned food safety issue ever.
文摘IN April 2018,China announced the plan to build Hainan Province into a pilot free trade zone,gradually exploring and steadily promoting the establishment of a free trade port with Chinese characteristics.While embracing its new mission,the largest special economic zone in China welcomed historic opportunities.Since then,Hainan,has been advancing reforms revolved around institutional innovation,keeping itself aligned with international economic and trade rules,and taking initiative in opening more sectors to foreign investors.
