On September 17,2015,the Hurun Institute released the Hurun Most Valuable Chinese Brands 2015,a comprehensive ranking of the 200 most valuable home-grown China's Mainland brands.This is the tenth consecutive year ...On September 17,2015,the Hurun Institute released the Hurun Most Valuable Chinese Brands 2015,a comprehensive ranking of the 200 most valuable home-grown China's Mainland brands.This is the tenth consecutive year of the list.'Whilst most Chinese brands remain unknown to the展开更多
THE people of Xinjiang have always needed to be resilient.Over four-hour flight time from Beijing,Xinjiang Uygur Autonomous Region is located on China’s western border.Historically,Xinjiang’s people have needed to h...THE people of Xinjiang have always needed to be resilient.Over four-hour flight time from Beijing,Xinjiang Uygur Autonomous Region is located on China’s western border.Historically,Xinjiang’s people have needed to hold steadfast against invaders while encouraging trade between China and central Asia,Europe and beyond.For 25 years until 2016,they also witnessed multiple atrocities perpetrated by separatists.展开更多
NCPA Children’s Opera Commission Effendi&His Double.Date:May 23-June 1,2025,Venue:National Center for the Performing Arts.The opera tells a story about a figure named Effendi waging a battle of wits against his d...NCPA Children’s Opera Commission Effendi&His Double.Date:May 23-June 1,2025,Venue:National Center for the Performing Arts.The opera tells a story about a figure named Effendi waging a battle of wits against his double in Sun City.He maintains justice by punishing the fake Effendi,who cheats the citizens of Sun City.展开更多
语言学习不应仅限于词法和句法的学习,而应更加关注词汇在语境中的整体性意义。本研究借助美国当代英语语料库(COCA),以动词witness为节点词来研究扩展意义单位,分析该词的类联接特点、搭配词的语义倾向以及结合语境所体现的语义韵信息...语言学习不应仅限于词法和句法的学习,而应更加关注词汇在语境中的整体性意义。本研究借助美国当代英语语料库(COCA),以动词witness为节点词来研究扩展意义单位,分析该词的类联接特点、搭配词的语义倾向以及结合语境所体现的语义韵信息。研究发现,动词witness主要与名词、副词搭配,其中名词搭配强调事件描述,副词搭配突出时间体验。此外,该词还能与介词、助动词、副词、代词、冠词和名词等词类进行多样化的类联接,构成丰富的句法结构。在语义倾向方面,witness体现出直接性、亲历性,并常与重大事件相关联。其语义韵以中性和消极倾向为主,积极倾向较少。研究为理解witness词汇提供了新的视角,并为语言学习和教学提供了实用框架。Language learning should extend beyond morphology and syntax to encompass the holistic meaning of vocabulary in context. This study employs the Corpus of Contemporary American English (COCA) to investigate the extended unit of meaning of the verb witness, analyzing its collocational patterns, the semantic tendencies of its co-occurring words, and semantic prosody information embodied in the context. The findings reveal that the verb witness primarily collocates with nouns and adverbs, with noun collocations emphasizing event description and adverb collocations highlighting temporal experience. Additionally, witness forms diverse syntactic structures through various collocations with prepositions, auxiliary verbs, pronouns, determiners, nouns, and other word classes. In terms of semantic tendencies, witness conveys directness, firsthand experience, and is often associated with significant events. Its semantic prosody is predominantly neutral or negative, with fewer instances of positive connotations. This study provides new insights for understanding the lexical behavior of witness and a practical framework for language learning and teaching.展开更多
I first arrived in China in 1990 and instantly fell in love with the country.It was not as dynamic in the early 1990s as it is today.But I likened the country,its people and people’s enthusiasm to
A new approach to deciding quasi-reducibility is proposed by intro- ducing witnesses. Furthermore, an algorithm for constructing witnessed test sets of lelh-linear rewrite systems h. been designed. Compared with the s...A new approach to deciding quasi-reducibility is proposed by intro- ducing witnesses. Furthermore, an algorithm for constructing witnessed test sets of lelh-linear rewrite systems h. been designed. Compared with the standard test set approach presented by Kapur, Narendran and Zhang, the method proposed generates test sets of smaller size and therefore has more efficient applications .展开更多
Higher dimensional entangled states demonstrate significant advantages in quantum information processing tasks. The Schmidt number is a quantity of the entanglement dimension of a bipartite state. Here we build famili...Higher dimensional entangled states demonstrate significant advantages in quantum information processing tasks. The Schmidt number is a quantity of the entanglement dimension of a bipartite state. Here we build families of k-positive maps from the symmetric information complete positive operator-valued measurements and mutually unbiased bases, and we also present the Schmidt number witnesses, correspondingly. At last, based on the witnesses obtained from mutually unbiased bases, we show the distance between a bipartite state and the set of states with a Schmidt number less than k.展开更多
Wireless Power Transfer(WPT)technology can provide real-time power for many terminal devices in Internet of Things(IoT)through millimeterWave(mmWave)to support applications with large capacity and low latency.Although...Wireless Power Transfer(WPT)technology can provide real-time power for many terminal devices in Internet of Things(IoT)through millimeterWave(mmWave)to support applications with large capacity and low latency.Although the intelligent reflecting surface(IRS)can be adopted to create effective virtual links to address the mmWave blockage problem,the conventional solutions only adopt IRS in the downlink from the Base Station(BS)to the users to enhance the received signal strength.In practice,the reflection of IRS is also applicable to the uplink to improve the spectral efficiency.It is a challenging to jointly optimize IRS beamforming and system resource allocation for wireless energy acquisition and information transmission.In this paper,we first design a Low-Energy Adaptive Clustering Hierarchy(LEACH)clustering protocol for clustering and data collection.Then,the problem of maximizing the minimum system spectral efficiency is constructed by jointly optimizing the transmit power of sensor devices,the uplink and downlink transmission times,the active beamforming at the BS,and the IRS dynamic beamforming.To solve this non-convex optimization problem,we propose an alternating optimization(AO)-based joint solution algorithm.Simulation results show that the use of IRS dynamic beamforming can significantly improve the spectral efficiency of the system,and ensure the reliability of equipment communication and the sustainability of energy supply under NLOS link.展开更多
Directions：For this part,you are allowed 30 minutes to write a short essay on the following question.You should write at least 120 words but no more than 180 words.Suppose a foreign friend of yours is coming to visit...Directions：For this part,you are allowed 30 minutes to write a short essay on the following question.You should write at least 120 words but no more than 180 words.Suppose a foreign friend of yours is coming to visit your hometown,what is the most interesting place you would like to take him/her to see and why？展开更多
文摘On September 17,2015,the Hurun Institute released the Hurun Most Valuable Chinese Brands 2015,a comprehensive ranking of the 200 most valuable home-grown China's Mainland brands.This is the tenth consecutive year of the list.'Whilst most Chinese brands remain unknown to the
文摘THE people of Xinjiang have always needed to be resilient.Over four-hour flight time from Beijing,Xinjiang Uygur Autonomous Region is located on China’s western border.Historically,Xinjiang’s people have needed to hold steadfast against invaders while encouraging trade between China and central Asia,Europe and beyond.For 25 years until 2016,they also witnessed multiple atrocities perpetrated by separatists.
文摘NCPA Children’s Opera Commission Effendi&His Double.Date:May 23-June 1,2025,Venue:National Center for the Performing Arts.The opera tells a story about a figure named Effendi waging a battle of wits against his double in Sun City.He maintains justice by punishing the fake Effendi,who cheats the citizens of Sun City.
文摘语言学习不应仅限于词法和句法的学习,而应更加关注词汇在语境中的整体性意义。本研究借助美国当代英语语料库(COCA),以动词witness为节点词来研究扩展意义单位,分析该词的类联接特点、搭配词的语义倾向以及结合语境所体现的语义韵信息。研究发现,动词witness主要与名词、副词搭配,其中名词搭配强调事件描述,副词搭配突出时间体验。此外,该词还能与介词、助动词、副词、代词、冠词和名词等词类进行多样化的类联接,构成丰富的句法结构。在语义倾向方面,witness体现出直接性、亲历性,并常与重大事件相关联。其语义韵以中性和消极倾向为主,积极倾向较少。研究为理解witness词汇提供了新的视角,并为语言学习和教学提供了实用框架。Language learning should extend beyond morphology and syntax to encompass the holistic meaning of vocabulary in context. This study employs the Corpus of Contemporary American English (COCA) to investigate the extended unit of meaning of the verb witness, analyzing its collocational patterns, the semantic tendencies of its co-occurring words, and semantic prosody information embodied in the context. The findings reveal that the verb witness primarily collocates with nouns and adverbs, with noun collocations emphasizing event description and adverb collocations highlighting temporal experience. Additionally, witness forms diverse syntactic structures through various collocations with prepositions, auxiliary verbs, pronouns, determiners, nouns, and other word classes. In terms of semantic tendencies, witness conveys directness, firsthand experience, and is often associated with significant events. Its semantic prosody is predominantly neutral or negative, with fewer instances of positive connotations. This study provides new insights for understanding the lexical behavior of witness and a practical framework for language learning and teaching.
文摘I first arrived in China in 1990 and instantly fell in love with the country.It was not as dynamic in the early 1990s as it is today.But I likened the country,its people and people’s enthusiasm to
文摘A new approach to deciding quasi-reducibility is proposed by intro- ducing witnesses. Furthermore, an algorithm for constructing witnessed test sets of lelh-linear rewrite systems h. been designed. Compared with the standard test set approach presented by Kapur, Narendran and Zhang, the method proposed generates test sets of smaller size and therefore has more efficient applications .
基金supported by the National Natural Science Foundation of China (Grant No. 12301580)the Funds of the College of Information Science and Technology, Beijing University of Chemical Technology (Grant No. 0104/11170044115)。
文摘Higher dimensional entangled states demonstrate significant advantages in quantum information processing tasks. The Schmidt number is a quantity of the entanglement dimension of a bipartite state. Here we build families of k-positive maps from the symmetric information complete positive operator-valued measurements and mutually unbiased bases, and we also present the Schmidt number witnesses, correspondingly. At last, based on the witnesses obtained from mutually unbiased bases, we show the distance between a bipartite state and the set of states with a Schmidt number less than k.
基金supported by the National Natural Science Foundation of China 62001051.
文摘Wireless Power Transfer(WPT)technology can provide real-time power for many terminal devices in Internet of Things(IoT)through millimeterWave(mmWave)to support applications with large capacity and low latency.Although the intelligent reflecting surface(IRS)can be adopted to create effective virtual links to address the mmWave blockage problem,the conventional solutions only adopt IRS in the downlink from the Base Station(BS)to the users to enhance the received signal strength.In practice,the reflection of IRS is also applicable to the uplink to improve the spectral efficiency.It is a challenging to jointly optimize IRS beamforming and system resource allocation for wireless energy acquisition and information transmission.In this paper,we first design a Low-Energy Adaptive Clustering Hierarchy(LEACH)clustering protocol for clustering and data collection.Then,the problem of maximizing the minimum system spectral efficiency is constructed by jointly optimizing the transmit power of sensor devices,the uplink and downlink transmission times,the active beamforming at the BS,and the IRS dynamic beamforming.To solve this non-convex optimization problem,we propose an alternating optimization(AO)-based joint solution algorithm.Simulation results show that the use of IRS dynamic beamforming can significantly improve the spectral efficiency of the system,and ensure the reliability of equipment communication and the sustainability of energy supply under NLOS link.
文摘Directions：For this part,you are allowed 30 minutes to write a short essay on the following question.You should write at least 120 words but no more than 180 words.Suppose a foreign friend of yours is coming to visit your hometown,what is the most interesting place you would like to take him/her to see and why？
