Soil salinization has emerged as a major threat affecting crop yields.Global warming leads to a massive loss of terrestrial water and makes soils saltier.Cultivating salt-tolerant crops is the major strategy adopted f...Soil salinization has emerged as a major threat affecting crop yields.Global warming leads to a massive loss of terrestrial water and makes soils saltier.Cultivating salt-tolerant crops is the major strategy adopted for utilizing these salinized soils.Sea Rice 86(SR86)is one such elite salt-tolerant rice variety derived from ancient indica rice.However,SR86 has multiple wild traits,such as tallness and strong photoperiod sensitivity(PS),which have limited its application in agricultural production.In this study,we edited 13 genes responsible for 10 traits in SR86 to develop an improved SR86M line by using clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9 multiplex-genome-editing technology,high-throughput sequencing,crossing,and progeny selection.Subsequent analysis of SR86M detected nine genes with expected mutations,leading to changes in seven traits,including improvements of plant architecture,plant height and PS decreased,grain number,grain length,fragrance,and nitrogen utilization efficiency increased.The improved agronomic traits in SR86M are similar to modern cultivated rice,along with elite salt tolerance like SR86,indicating suitability for potential cultivation.Our results also reveal the efficiency of multiplex-genome-editing in directional improvement of crop varieties.展开更多
With the rapid development of social economy, people's living standards and quality have been greatly improved, and the contradiction of resources has gradually emerged. This will become an important factor restri...With the rapid development of social economy, people's living standards and quality have been greatly improved, and the contradiction of resources has gradually emerged. This will become an important factor restricting the sustainable development of mankind. Therefore, in order to better meet people's demand for various resources, the thermal power plant has put forward higher requirements. In the process of operation, the corresponding measures must be taken to solve the problems, and only in this way can the economic and social benefits be improved. In this paper, the improvement direction of thermal energy and power engineering in thermal power plant is analyzed in depth, hoping to provide reference for relevant personnel.展开更多
This paper proposes a decentralized robust two-stage dispatch framework for multi-area integrated electric-gas systems (M-IEGSs), with the consideration of Weymouth and linepack equations of tie-pipelines. The overall...This paper proposes a decentralized robust two-stage dispatch framework for multi-area integrated electric-gas systems (M-IEGSs), with the consideration of Weymouth and linepack equations of tie-pipelines. The overall methodology includes the equivalent conversion for the robust two-stage program and the decentralized optimization for the equivalent form. To obtain a tractable and equivalent counterpart for the robust two-stage program, a quadruple-loop procedure based on the column-and-constraint generation (C&CG) and the penalty convex-concave procedure (P-CCP) algorithms is derived, resulting in a series of mixed integer second-order cone programs (MISOCPs). Then, an improved I-ADMM is proposed to realize the decentralized optimization for MISOCPs. Moreover, three acceleration methods are devised to reduce the computation burden. Simulation results validate the effectiveness of the proposed methodology and corresponding acceleration measures.展开更多
In this paper,a model of a large-scale optimal power flow(OPF)under voltage grading and network partition and its algorithm is presented.Based on the principles of open loop operations,the node injecting current metho...In this paper,a model of a large-scale optimal power flow(OPF)under voltage grading and network partition and its algorithm is presented.Based on the principles of open loop operations,the node injecting current method is used to divide the large-scale power grid into voltage grading and district dividing structures.The power network is further divided into a high-voltage main network and several subnets according to voltage levels of 220 kV.The subnets are connected by means of boundary nodes,and the partition model is solved using the improved approximate Newton direction method,which achieves complete dynamic decoupling simply by exchanging boundary variables between the main network and the subnets.A largescale power grid thus is decomposed into many subnets,making the solution of the problem simpler and faster while helping to protect the information of individual subnets.The system is tested for correctness and effectiveness of the proposed model,and the results obtained are matched in real-time.Finally,the algorithm is seen to have good convergence while improving calculation speed.展开更多
基金funded by grants from the National Key R&D Program of China(2023ZD04073)the Major Program of Guangdong Basic and Applied Research(2019B030302006)+1 种基金the open competition program of top 10 critical priorities of Agricultural Science and Technology Innovation for the 14th Five-Year Plan of Guangdong Province(2022SDZG05)Guangdong Basic Research Center of Excellence for Precise Breeding of Future Crops Major Project(FCBRCE-202502,FCBRCE-202504).
文摘Soil salinization has emerged as a major threat affecting crop yields.Global warming leads to a massive loss of terrestrial water and makes soils saltier.Cultivating salt-tolerant crops is the major strategy adopted for utilizing these salinized soils.Sea Rice 86(SR86)is one such elite salt-tolerant rice variety derived from ancient indica rice.However,SR86 has multiple wild traits,such as tallness and strong photoperiod sensitivity(PS),which have limited its application in agricultural production.In this study,we edited 13 genes responsible for 10 traits in SR86 to develop an improved SR86M line by using clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9 multiplex-genome-editing technology,high-throughput sequencing,crossing,and progeny selection.Subsequent analysis of SR86M detected nine genes with expected mutations,leading to changes in seven traits,including improvements of plant architecture,plant height and PS decreased,grain number,grain length,fragrance,and nitrogen utilization efficiency increased.The improved agronomic traits in SR86M are similar to modern cultivated rice,along with elite salt tolerance like SR86,indicating suitability for potential cultivation.Our results also reveal the efficiency of multiplex-genome-editing in directional improvement of crop varieties.
文摘With the rapid development of social economy, people's living standards and quality have been greatly improved, and the contradiction of resources has gradually emerged. This will become an important factor restricting the sustainable development of mankind. Therefore, in order to better meet people's demand for various resources, the thermal power plant has put forward higher requirements. In the process of operation, the corresponding measures must be taken to solve the problems, and only in this way can the economic and social benefits be improved. In this paper, the improvement direction of thermal energy and power engineering in thermal power plant is analyzed in depth, hoping to provide reference for relevant personnel.
文摘This paper proposes a decentralized robust two-stage dispatch framework for multi-area integrated electric-gas systems (M-IEGSs), with the consideration of Weymouth and linepack equations of tie-pipelines. The overall methodology includes the equivalent conversion for the robust two-stage program and the decentralized optimization for the equivalent form. To obtain a tractable and equivalent counterpart for the robust two-stage program, a quadruple-loop procedure based on the column-and-constraint generation (C&CG) and the penalty convex-concave procedure (P-CCP) algorithms is derived, resulting in a series of mixed integer second-order cone programs (MISOCPs). Then, an improved I-ADMM is proposed to realize the decentralized optimization for MISOCPs. Moreover, three acceleration methods are devised to reduce the computation burden. Simulation results validate the effectiveness of the proposed methodology and corresponding acceleration measures.
基金supported by National Basic Research Program of China(973 Program)under Grant 2013CB228205National Natural Science Foundation of China under Grant 51541707.
文摘In this paper,a model of a large-scale optimal power flow(OPF)under voltage grading and network partition and its algorithm is presented.Based on the principles of open loop operations,the node injecting current method is used to divide the large-scale power grid into voltage grading and district dividing structures.The power network is further divided into a high-voltage main network and several subnets according to voltage levels of 220 kV.The subnets are connected by means of boundary nodes,and the partition model is solved using the improved approximate Newton direction method,which achieves complete dynamic decoupling simply by exchanging boundary variables between the main network and the subnets.A largescale power grid thus is decomposed into many subnets,making the solution of the problem simpler and faster while helping to protect the information of individual subnets.The system is tested for correctness and effectiveness of the proposed model,and the results obtained are matched in real-time.Finally,the algorithm is seen to have good convergence while improving calculation speed.
