先来看摘自一篇英语散文中的段落：地点哈瓦那,一个匈牙利人与倒卖雪茄的黑人烟贩子讨价还价。＂You’re crazy!＂cries the Hungarian in slightly accented English,taking one of the boxes from the trunk and waving it in Howard ...先来看摘自一篇英语散文中的段落：地点哈瓦那,一个匈牙利人与倒卖雪茄的黑人烟贩子讨价还价。＂You’re crazy!＂cries the Hungarian in slightly accented English,taking one of the boxes from the trunk and waving it in Howard Bingham’s face.＂These are Cohiba Esplendidos!The best in the world!You will pay one thousand dollars for a box like this in the States.＂展开更多
In the blockchain,the consensus mechanism plays a key role in maintaining the security and legitimation of contents recorded in the blocks.Various blockchain consensus mechanisms have been proposed.However,there is no...In the blockchain,the consensus mechanism plays a key role in maintaining the security and legitimation of contents recorded in the blocks.Various blockchain consensus mechanisms have been proposed.However,there is no technical analysis and comparison as a guideline to determine which type of consensus mechanism should be adopted in a specific scenario/application.To this end,this work investigates three mainstream consensus mechanisms in the blockchain,namely,Proof of Work(PoW),Proof of Stake(PoS),and Direct Acyclic Graph(DAG),and identifies their performances in terms of the average time to generate a new block,the confirmation delay,the Transaction Per Second(TPS)and the confirmation failure probability.The results show that the consensus process is affected by both network resource(computation power/coin age,buffer size)and network load conditions.In addition,it shows that PoW and PoS are more sensitive to the change of network resource while DAG is more sensitive to network load conditions.展开更多
On February 19,2012,WalMart Stores,Inc.disclosed its additional investment in Yihaodian,a fast-growing electronic commerce website in China,making Walmart’s total ownership stake in Yihaodian to reach approximately 5...On February 19,2012,WalMart Stores,Inc.disclosed its additional investment in Yihaodian,a fast-growing electronic commerce website in China,making Walmart’s total ownership stake in Yihaodian to reach approximately 51%.It was Wal-Mart’s second investment for the purpose展开更多
An Ethereum blockchain based on proof of stake ( PoS) consensus mechanism is used to achieve the data sharing within the civil aviation service platform for both airport group management and passengers. Considering th...An Ethereum blockchain based on proof of stake ( PoS) consensus mechanism is used to achieve the data sharing within the civil aviation service platform for both airport group management and passengers. Considering the Gas consumption of Ethereum, the dynamic batch-service capacity constraint by the Block Gas Limit and the priority mechanism depending on the different Gas Price of transactions, M/ G/1 queuing theory with batch-service is used to construct the service model of transactions confirmation process in the proposed blockchain system, where the effects of transactions arrival rate, block capacity, service rate and number of nodes on the average confirmation time of transactions with different priority are analyzed, and eventually a performance analysis model of blockchain for civil aviation business data is proposed. The simulation results prove the usability and accuracy of the model, which can provide both theoretical basis for data sharing of civil aviation using Ethereum blockchain and the further optimization of transactions confirmation time.展开更多
E-commerce is becoming a focus for retailers and brand owners.China is expected to become the world’s largest retail market by 2018,though its retail’s growth rate is slowing,as revealed in a recent report by PwC.Ch...E-commerce is becoming a focus for retailers and brand owners.China is expected to become the world’s largest retail market by 2018,though its retail’s growth rate is slowing,as revealed in a recent report by PwC.China retail’s growth rate has fallen from a peak of 15.6%in 2009,yet China remains irresistible to global retail chains.China is still expected to achieve average annual retail volume growth of 8.7%in the next two years.展开更多
In October 2013,Chinese President Xi Jinping proposed to establish Asia Infrastructure Investment Bank during his meeting with Indonesia President Susilo.It is comprehensive and complex economic and political situatio...In October 2013,Chinese President Xi Jinping proposed to establish Asia Infrastructure Investment Bank during his meeting with Indonesia President Susilo.It is comprehensive and complex economic and political situations that helps to bring about the establishment of AⅡB.展开更多
AWRITER once comparedSino-foreign cultural ex- changes to a lengthybridge across the oceans of theworld.The Beijing CPAA Cultur- al Entertainment Company,esta- blished in the spring of this year,undoubtedly comes to m...AWRITER once comparedSino-foreign cultural ex- changes to a lengthybridge across the oceans of theworld.The Beijing CPAA Cultur- al Entertainment Company,esta- blished in the spring of this year,undoubtedly comes to many peo- ple’s minds when contemplatingthis remark.The Beijing CPAA Cultural En- tertainment Company is a subsidi- ary of the China Performing ArtsAgency,directly under the Ministryof Culture.It is a self-managed statefirm specializing in international ex-展开更多
Between November 24 and 25,2015,the 4th Summit of China-Central-East Europe Leaders’Meeting was held in Suzhou,Jiangsu Province,which issued the Suzhou Guidelines for Cooperation between China and Central and Eastern...Between November 24 and 25,2015,the 4th Summit of China-Central-East Europe Leaders’Meeting was held in Suzhou,Jiangsu Province,which issued the Suzhou Guidelines for Cooperation between China and Central and Eastern European Countries and the Medium-Term Agenda for Cooperation between China and Central and Eastern European Countries framing the develop-展开更多
一、What 有时相当于 just as。1.Poultry is for the cook what canvas is for the painter厨师离不了家禽正如画家离不了画布一样。2.Leaves are to the plant what lungs are to the animal叶之于植物犹如肺之于动物。二、what 与 wi...一、What 有时相当于 just as。1.Poultry is for the cook what canvas is for the painter厨师离不了家禽正如画家离不了画布一样。2.Leaves are to the plant what lungs are to the animal叶之于植物犹如肺之于动物。二、what 与 with 连用表示原因,与 by 连用表示方法或手段;展开更多
[问][159]如何使用 who 与 whoever?[答]who 与 whoever 均可用作连接代词,引导主语从句和宾语从句,whoever 是 who 的强势形式,由 who+ever 构成。如:1.Who robbed the bark is not clear.2.Whoever breaks the law will be punished....[问][159]如何使用 who 与 whoever?[答]who 与 whoever 均可用作连接代词,引导主语从句和宾语从句,whoever 是 who 的强势形式,由 who+ever 构成。如:1.Who robbed the bark is not clear.2.Whoever breaks the law will be punished.例1中 who 引导的主语从句所指的是“谁抢劫了银行”这件事;而 whoever=anyone who,any per-展开更多
Indeed,the continuing investment in high-stakes international tests-explored in‘Washback and impact'(59/2:2005)--and the development of The Common European Framework'(60/2:2006)can in part be characterized as...Indeed,the continuing investment in high-stakes international tests-explored in‘Washback and impact'(59/2:2005)--and the development of The Common European Framework'(60/2:2006)can in part be characterized as responses within ELT(and language education more generally)to globalization and increased population mobility.展开更多
In the 21<sup>st</sup> Century, Food and Agricultural stakes are sinuously rushing in a difficult legible heading. Crossing a transitory phase period between Agriculture, Traditional, Urban and Modern, the...In the 21<sup>st</sup> Century, Food and Agricultural stakes are sinuously rushing in a difficult legible heading. Crossing a transitory phase period between Agriculture, Traditional, Urban and Modern, the affirmation of a conquering alimentary identity and Nationalist openings is confuse with an Extraordinary Demographic Period of human scale history. Millions of people are worried about the innovation of urban agriculture for food and health security. Food education at the confines of the world’s greatest stakes proves necessary, since the order oneself retreat combines with the passion of solidarity and social progress, advance in technology, facilitating our life at same time generating new threats for citizenship. In this Article, we propose another way of reading the heterogeneous world of yesterday, today and tomorrow. Not only for Historians but also by associating Scientific Relations of Social and Human Researchers. Such a step is necessary to endorse the word of reading, for comparism and review of an agriculture in full mutation. It also instigates by referring to History, Social force, Economic stakes and Diplomatic globalization food teste, intention and invention, which change with the everyday society. You will find out that analysis done in this article are sometime completely done events through original texts, assembled around the five fundamental notions: International Relations and Geopolitical Agriculture of yesterday;Yesterday Urban Economic Agriculture;Environmental and Food Climate Stakes, Science and Culture adapted to agriculture and food mutations.展开更多
According to Bloomberg on November 12, China Petrochemical Corp., Asia’s biggest ref iner, agreed to buy a 30 percent stake in Galp Energia SGPS SA (GALP)’s Brazilian unit, its second invest- ment in offshore oil fi...According to Bloomberg on November 12, China Petrochemical Corp., Asia’s biggest ref iner, agreed to buy a 30 percent stake in Galp Energia SGPS SA (GALP)’s Brazilian unit, its second invest- ment in offshore oil fields in Latin America’s largest economy in as many years.展开更多
BP,the UK energy group,is planning to sell one of its biggest Chinese investments,by disposing of its 50percent stake in the SECCO petrochemicals plant near Shanghai.BP is the latest western oil company to curtail act...BP,the UK energy group,is planning to sell one of its biggest Chinese investments,by disposing of its 50percent stake in the SECCO petrochemicals plant near Shanghai.BP is the latest western oil company to curtail activity in China,as energy groups reel from low crude and petrochemical prices.China’s slow liberalization展开更多
How Egypt can attempt to revert back to its former glory OPTIMISTS who entertained thoughts that Egypt would revert to its former state of peace and tranquility after parliamentary elections must have been badly jolte...How Egypt can attempt to revert back to its former glory OPTIMISTS who entertained thoughts that Egypt would revert to its former state of peace and tranquility after parliamentary elections must have been badly jolted in early February.This is when a fairly innocuous event,a football match between two traditionally rival teams,ended with the death of over 70 people.How a sporting event can lead to such sectarian-motivated carnage underpins the deep-seated animosities unleashed after the January 25,2011 revo-展开更多
South China Rubber and Tire Group Co., Ltd.has acquired a 75% stake (state-owned) inGuangzhou Bolex Tire Ltd. from the formerGuangzhou Rubber Enterprise Group Co., Ltd.in a gratis transfer, announced on July 20th.
文摘先来看摘自一篇英语散文中的段落：地点哈瓦那,一个匈牙利人与倒卖雪茄的黑人烟贩子讨价还价。＂You’re crazy!＂cries the Hungarian in slightly accented English,taking one of the boxes from the trunk and waving it in Howard Bingham’s face.＂These are Cohiba Esplendidos!The best in the world!You will pay one thousand dollars for a box like this in the States.＂
基金the National Natural Science Foundation of China under Grant 61701059,Grant 61941114,and Grant 61831002,in part by the Fundamental Research Funds for the Central Universities of New TeachersProject,in part by the Chongqing Technological Innovation and Application Development Projects under Grant cstc2019jscx-msxm1322,and in part by the Eighteentg Open Foundation of State Key Lab of Integrated Services Networks of Xidian University under Grant ISN20-05.
文摘In the blockchain,the consensus mechanism plays a key role in maintaining the security and legitimation of contents recorded in the blocks.Various blockchain consensus mechanisms have been proposed.However,there is no technical analysis and comparison as a guideline to determine which type of consensus mechanism should be adopted in a specific scenario/application.To this end,this work investigates three mainstream consensus mechanisms in the blockchain,namely,Proof of Work(PoW),Proof of Stake(PoS),and Direct Acyclic Graph(DAG),and identifies their performances in terms of the average time to generate a new block,the confirmation delay,the Transaction Per Second(TPS)and the confirmation failure probability.The results show that the consensus process is affected by both network resource(computation power/coin age,buffer size)and network load conditions.In addition,it shows that PoW and PoS are more sensitive to the change of network resource while DAG is more sensitive to network load conditions.
文摘On February 19,2012,WalMart Stores,Inc.disclosed its additional investment in Yihaodian,a fast-growing electronic commerce website in China,making Walmart’s total ownership stake in Yihaodian to reach approximately 51%.It was Wal-Mart’s second investment for the purpose
基金the Open Foundation of Key Laboratory of Airports Cluster Intelligent Operation(No.KLACIO201900006124)National Natural Science Foundation of China(No.61901011)+1 种基金Foundation of Beijing Municipal Commission of Education(No.KM202010005017,KM202110005021)Beijing Natural Science Foundation(No.L192002).
文摘An Ethereum blockchain based on proof of stake ( PoS) consensus mechanism is used to achieve the data sharing within the civil aviation service platform for both airport group management and passengers. Considering the Gas consumption of Ethereum, the dynamic batch-service capacity constraint by the Block Gas Limit and the priority mechanism depending on the different Gas Price of transactions, M/ G/1 queuing theory with batch-service is used to construct the service model of transactions confirmation process in the proposed blockchain system, where the effects of transactions arrival rate, block capacity, service rate and number of nodes on the average confirmation time of transactions with different priority are analyzed, and eventually a performance analysis model of blockchain for civil aviation business data is proposed. The simulation results prove the usability and accuracy of the model, which can provide both theoretical basis for data sharing of civil aviation using Ethereum blockchain and the further optimization of transactions confirmation time.
文摘E-commerce is becoming a focus for retailers and brand owners.China is expected to become the world’s largest retail market by 2018,though its retail’s growth rate is slowing,as revealed in a recent report by PwC.China retail’s growth rate has fallen from a peak of 15.6%in 2009,yet China remains irresistible to global retail chains.China is still expected to achieve average annual retail volume growth of 8.7%in the next two years.
文摘In October 2013,Chinese President Xi Jinping proposed to establish Asia Infrastructure Investment Bank during his meeting with Indonesia President Susilo.It is comprehensive and complex economic and political situations that helps to bring about the establishment of AⅡB.
文摘AWRITER once comparedSino-foreign cultural ex- changes to a lengthybridge across the oceans of theworld.The Beijing CPAA Cultur- al Entertainment Company,esta- blished in the spring of this year,undoubtedly comes to many peo- ple’s minds when contemplatingthis remark.The Beijing CPAA Cultural En- tertainment Company is a subsidi- ary of the China Performing ArtsAgency,directly under the Ministryof Culture.It is a self-managed statefirm specializing in international ex-
文摘Between November 24 and 25,2015,the 4th Summit of China-Central-East Europe Leaders’Meeting was held in Suzhou,Jiangsu Province,which issued the Suzhou Guidelines for Cooperation between China and Central and Eastern European Countries and the Medium-Term Agenda for Cooperation between China and Central and Eastern European Countries framing the develop-
文摘一、What 有时相当于 just as。1.Poultry is for the cook what canvas is for the painter厨师离不了家禽正如画家离不了画布一样。2.Leaves are to the plant what lungs are to the animal叶之于植物犹如肺之于动物。二、what 与 with 连用表示原因,与 by 连用表示方法或手段;
文摘[问][159]如何使用 who 与 whoever?[答]who 与 whoever 均可用作连接代词,引导主语从句和宾语从句,whoever 是 who 的强势形式,由 who+ever 构成。如:1.Who robbed the bark is not clear.2.Whoever breaks the law will be punished.例1中 who 引导的主语从句所指的是“谁抢劫了银行”这件事;而 whoever=anyone who,any per-
文摘Indeed,the continuing investment in high-stakes international tests-explored in‘Washback and impact'(59/2:2005)--and the development of The Common European Framework'(60/2:2006)can in part be characterized as responses within ELT(and language education more generally)to globalization and increased population mobility.
文摘In the 21<sup>st</sup> Century, Food and Agricultural stakes are sinuously rushing in a difficult legible heading. Crossing a transitory phase period between Agriculture, Traditional, Urban and Modern, the affirmation of a conquering alimentary identity and Nationalist openings is confuse with an Extraordinary Demographic Period of human scale history. Millions of people are worried about the innovation of urban agriculture for food and health security. Food education at the confines of the world’s greatest stakes proves necessary, since the order oneself retreat combines with the passion of solidarity and social progress, advance in technology, facilitating our life at same time generating new threats for citizenship. In this Article, we propose another way of reading the heterogeneous world of yesterday, today and tomorrow. Not only for Historians but also by associating Scientific Relations of Social and Human Researchers. Such a step is necessary to endorse the word of reading, for comparism and review of an agriculture in full mutation. It also instigates by referring to History, Social force, Economic stakes and Diplomatic globalization food teste, intention and invention, which change with the everyday society. You will find out that analysis done in this article are sometime completely done events through original texts, assembled around the five fundamental notions: International Relations and Geopolitical Agriculture of yesterday;Yesterday Urban Economic Agriculture;Environmental and Food Climate Stakes, Science and Culture adapted to agriculture and food mutations.
文摘According to Bloomberg on November 12, China Petrochemical Corp., Asia’s biggest ref iner, agreed to buy a 30 percent stake in Galp Energia SGPS SA (GALP)’s Brazilian unit, its second invest- ment in offshore oil fields in Latin America’s largest economy in as many years.
文摘BP,the UK energy group,is planning to sell one of its biggest Chinese investments,by disposing of its 50percent stake in the SECCO petrochemicals plant near Shanghai.BP is the latest western oil company to curtail activity in China,as energy groups reel from low crude and petrochemical prices.China’s slow liberalization
文摘How Egypt can attempt to revert back to its former glory OPTIMISTS who entertained thoughts that Egypt would revert to its former state of peace and tranquility after parliamentary elections must have been badly jolted in early February.This is when a fairly innocuous event,a football match between two traditionally rival teams,ended with the death of over 70 people.How a sporting event can lead to such sectarian-motivated carnage underpins the deep-seated animosities unleashed after the January 25,2011 revo-
文摘South China Rubber and Tire Group Co., Ltd.has acquired a 75% stake (state-owned) inGuangzhou Bolex Tire Ltd. from the formerGuangzhou Rubber Enterprise Group Co., Ltd.in a gratis transfer, announced on July 20th.
