Thermoelectric power generation represents a class of energy conversion technology,which has been used in power supply of aeronautic and astronautic exploring missions,now showing notable advantages to harvest the wid...Thermoelectric power generation represents a class of energy conversion technology,which has been used in power supply of aeronautic and astronautic exploring missions,now showing notable advantages to harvest the widely distributed waste heat and convert the abundant solar energy into electricity at lower cost than Si based photovoltaic technology.Thermoelectric dimensionless figure of merit ZT plays a key role in the conversion efficiency from thermal to electrical energy.Low thermal conductivity and large Seebeck coefficient make the AgSbTe 2 compound a very promising candidate for high efficiency p-type thermoelectric applications.The AgSbTe2-based thermoelectric system has been repeatedly studied as prospective thermoelectric materials.In this review,we firstly clarify some fundamental tradeoffs dictating the ZT value through the relationship ZT =S 2 σT/κ.We also pay special attentions to the recent advances in AgSbTe2 based thermoelectric materials.Finally,we provide an outlook of new directions in this filed.展开更多
The complete coding sequence ofRaphanus sativusWUS gene was obtained by usingArabidopsis thalianagene se-quence (NM_127349) as a probe in silico cloning. Then the hydrophilicity, secondary structure and advanced struc...The complete coding sequence ofRaphanus sativusWUS gene was obtained by usingArabidopsis thalianagene se-quence (NM_127349) as a probe in silico cloning. Then the hydrophilicity, secondary structure and advanced structure of WUS protein inRaphanus sativusare analyzed by using bioinformatics methods. The results show that the cDNA was 1298 bp, with no intron, contains an open reading frame of 936bp, encoding 312aa protein. The protein coded byRaphanus sativusgene showed 74% similarity toArabidopsis thaliana.展开更多
分布式能源的广泛发展使其成为电力市场的考虑重点,而传统的数据交互平台无法满足大规模分布式能源交易高效灵活、安全可靠的需求。为解决高信息处理复杂度与安全快速交易需求之间的矛盾,文中提出基于云边协同和区块链的分布式能源交易...分布式能源的广泛发展使其成为电力市场的考虑重点,而传统的数据交互平台无法满足大规模分布式能源交易高效灵活、安全可靠的需求。为解决高信息处理复杂度与安全快速交易需求之间的矛盾,文中提出基于云边协同和区块链的分布式能源交易系统架构和整体设计方案。首先设计了云计算与边缘计算协同并结合两层区块链的系统架构,利用区块链技术实现交易去中心化,提高了交易的自主高效性,利用云边协同提升海量数据的处理能力和交易系统的扩展能力。然后基于双向竞价和预测补偿设计了分布式能源的交易机制,进一步对区块链的核心共识算法进行分析,并采用改进委托权益证明(delegated proof of stake,DPoS)作为交易系统的高效率、高可靠共识算法,实现大规模分布式能源的高效可靠交易,促进分布式能源参与电网调节,提高电网稳定运行水平。最后通过应用实例验证了所提系统对大规模分布式能源交易的适应性和优越性。展开更多
文摘Thermoelectric power generation represents a class of energy conversion technology,which has been used in power supply of aeronautic and astronautic exploring missions,now showing notable advantages to harvest the widely distributed waste heat and convert the abundant solar energy into electricity at lower cost than Si based photovoltaic technology.Thermoelectric dimensionless figure of merit ZT plays a key role in the conversion efficiency from thermal to electrical energy.Low thermal conductivity and large Seebeck coefficient make the AgSbTe 2 compound a very promising candidate for high efficiency p-type thermoelectric applications.The AgSbTe2-based thermoelectric system has been repeatedly studied as prospective thermoelectric materials.In this review,we firstly clarify some fundamental tradeoffs dictating the ZT value through the relationship ZT =S 2 σT/κ.We also pay special attentions to the recent advances in AgSbTe2 based thermoelectric materials.Finally,we provide an outlook of new directions in this filed.
文摘The complete coding sequence ofRaphanus sativusWUS gene was obtained by usingArabidopsis thalianagene se-quence (NM_127349) as a probe in silico cloning. Then the hydrophilicity, secondary structure and advanced structure of WUS protein inRaphanus sativusare analyzed by using bioinformatics methods. The results show that the cDNA was 1298 bp, with no intron, contains an open reading frame of 936bp, encoding 312aa protein. The protein coded byRaphanus sativusgene showed 74% similarity toArabidopsis thaliana.
文摘分布式能源的广泛发展使其成为电力市场的考虑重点,而传统的数据交互平台无法满足大规模分布式能源交易高效灵活、安全可靠的需求。为解决高信息处理复杂度与安全快速交易需求之间的矛盾,文中提出基于云边协同和区块链的分布式能源交易系统架构和整体设计方案。首先设计了云计算与边缘计算协同并结合两层区块链的系统架构,利用区块链技术实现交易去中心化,提高了交易的自主高效性,利用云边协同提升海量数据的处理能力和交易系统的扩展能力。然后基于双向竞价和预测补偿设计了分布式能源的交易机制,进一步对区块链的核心共识算法进行分析,并采用改进委托权益证明(delegated proof of stake,DPoS)作为交易系统的高效率、高可靠共识算法,实现大规模分布式能源的高效可靠交易,促进分布式能源参与电网调节,提高电网稳定运行水平。最后通过应用实例验证了所提系统对大规模分布式能源交易的适应性和优越性。