At the invitation of Union Youth Federation of Cambodia and the International Department of the Lao People’s Revolutionary Party’s Central Committee,a Chinese NGO Delegation headed by Mr.Ni Jian,Secretary-General of...At the invitation of Union Youth Federation of Cambodia and the International Department of the Lao People’s Revolutionary Party’s Central Committee,a Chinese NGO Delegation headed by Mr.Ni Jian,Secretary-General of the Chinese Association for International Understanding paid visit to Cambodia and Laos from October 21 to 28.As a member of the delegation,I set my feet on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
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
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
Since the launch in 1950,Science China Series and Science Bulletin have published numerous significant scientific achievements,witnessing the development of science and technology in China and serving as a bridge conn...Since the launch in 1950,Science China Series and Science Bulletin have published numerous significant scientific achievements,witnessing the development of science and technology in China and serving as a bridge connecting Chinese scientists with their counterparts in the international scientific community.展开更多
China textile and apparel exports to Japan was witnessing a downturn in all statistics of China Customs and Japan METI in the Jan.-Apr. 2010 period. Exports to Japan this year later will face more pressure as gains in...China textile and apparel exports to Japan was witnessing a downturn in all statistics of China Customs and Japan METI in the Jan.-Apr. 2010 period. Exports to Japan this year later will face more pressure as gains in Japan’s consumption could moderate due to a lackluster jobs market and debt crisis.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
针对物流云服务模式中调度任务多、信息量大、需求广的特点,提出了一种改进蝙蝠算法求解物流云服务调度问题的方案,其优化目标为最小化调度时间和最大化资源利用率。根据设计的算法流程,首先基于工件升序排列(ranked order value,ROV)...针对物流云服务模式中调度任务多、信息量大、需求广的特点,提出了一种改进蝙蝠算法求解物流云服务调度问题的方案,其优化目标为最小化调度时间和最大化资源利用率。根据设计的算法流程,首先基于工件升序排列(ranked order value,ROV)规则对蝙蝠个体进行重新编码;然后调整初始化数据范围来减少分配任务超载和资源闲置现象,并在迭代过程中增加约束条件来均衡任务量,最终实现了资源与任务的智能调度。通过和遗传、粒子群以及基本蝙蝠算法的对比分析,体现了改进算法的优越性。最后利用Witness对方案进行仿真,证明了改进蝙蝠算法在解决物流云服务任务调度中的有效性,同时扩展了蝙蝠算法的应用领域。展开更多
文摘At the invitation of Union Youth Federation of Cambodia and the International Department of the Lao People’s Revolutionary Party’s Central Committee,a Chinese NGO Delegation headed by Mr.Ni Jian,Secretary-General of the Chinese Association for International Understanding paid visit to Cambodia and Laos from October 21 to 28.As a member of the delegation,I set my feet on
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Since the launch in 1950,Science China Series and Science Bulletin have published numerous significant scientific achievements,witnessing the development of science and technology in China and serving as a bridge connecting Chinese scientists with their counterparts in the international scientific community.
文摘China textile and apparel exports to Japan was witnessing a downturn in all statistics of China Customs and Japan METI in the Jan.-Apr. 2010 period. Exports to Japan this year later will face more pressure as gains in Japan’s consumption could moderate due to a lackluster jobs market and debt crisis.
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.
文摘针对物流云服务模式中调度任务多、信息量大、需求广的特点,提出了一种改进蝙蝠算法求解物流云服务调度问题的方案,其优化目标为最小化调度时间和最大化资源利用率。根据设计的算法流程,首先基于工件升序排列(ranked order value,ROV)规则对蝙蝠个体进行重新编码;然后调整初始化数据范围来减少分配任务超载和资源闲置现象,并在迭代过程中增加约束条件来均衡任务量,最终实现了资源与任务的智能调度。通过和遗传、粒子群以及基本蝙蝠算法的对比分析,体现了改进算法的优越性。最后利用Witness对方案进行仿真,证明了改进蝙蝠算法在解决物流云服务任务调度中的有效性,同时扩展了蝙蝠算法的应用领域。
