Offshore carbon dioxide(CO_(2)) geological storage(OCGS) represents a significant strategy for addressing climate change by curtailing greenhouse gas emissions. Nonetheless, the risk of CO_(2) leakage poses a substant...Offshore carbon dioxide(CO_(2)) geological storage(OCGS) represents a significant strategy for addressing climate change by curtailing greenhouse gas emissions. Nonetheless, the risk of CO_(2) leakage poses a substantial concern associated with this technology. This study introduces an innovative approach for establishing OCGS leakage scenarios, involving four pivotal stages, namely, interactive matrix establishment, risk matrix evaluation, cause–effect analysis, and scenario development, which has been implemented in the Pearl River Estuary Basin in China. The initial phase encompassed the establishment of an interaction matrix for OCGS systems based on features, events, and processes. Subsequent risk matrix evaluation and cause–effect analysis identified key system components, specifically CO_(2) injection and faults/features. Building upon this analysis, two leakage risk scenarios were successfully developed, accompanied by the corresponding mitigation measures. In addition, this study introduces the application of scenario development to risk assessment, including scenario numerical simulation and quantitative assessment. Overall, this research positively contributes to the sustainable development and safe operation of OCGS projects and holds potential for further refinement and broader application to diverse geographical environments and project requirements. This comprehensive study provides valuable insights into the establishment of OCGS leakage scenarios and demonstrates their practical application to risk assessment, laying the foundation for promoting the sustainable development and safe operation of ocean CO_(2) geological storage projects while proposing possibilities for future improvements and broader applications to different contexts.展开更多
Let G be a properly colored bipartite graph. A rainbow matching of G is such a matching in which no two edges have the same color. Let G be a properly colored bipartite graph with bipartition (X,Y) and . We show that ...Let G be a properly colored bipartite graph. A rainbow matching of G is such a matching in which no two edges have the same color. Let G be a properly colored bipartite graph with bipartition (X,Y) and . We show that if , then G has a rainbow coloring of size at least .展开更多
CO_(2) geological utilization and storage(CGUS)is an important technology to achieve a deep cut of global CO_(2) emissions.CO_(2) leakage from the subsurface may impair the performance of CGUS projects,and the CO_(2) ...CO_(2) geological utilization and storage(CGUS)is an important technology to achieve a deep cut of global CO_(2) emissions.CO_(2) leakage from the subsurface may impair the performance of CGUS projects,and the CO_(2) leakage through wellbores is the most common leakage pathway.This paper proposes a workflow for wellbore CO_(2) leakage risk management,and the workflow consists of the following steps:i)leakage risk identification;ii)leakage risk evaluation;iii)leakage risk monitoring;iv)leakage handling.Representative approaches in each step of the workflow are systematically reviewed.Key challenges of wellbore CO_(2) leakage risk management include:lack of effective detection and evaluation approaches to tackle the CO_(2) leakage risk induced by cement failure;lack of low-cost acid resistance alloys and CO_(2)-resistant cement;lack of automated monitoring systems that could enable automated shutdowns of the wellbore whenever certain warning criteria are met.展开更多
A graph is 1-planar if it can be drawn on the plane so that each edge is crossed by at most one other edge. In this paper, it is proved that each 1-planar graph with maximum degree △ is （A ＋ 1）-edge-choosable and...A graph is 1-planar if it can be drawn on the plane so that each edge is crossed by at most one other edge. In this paper, it is proved that each 1-planar graph with maximum degree △ is （A ＋ 1）-edge-choosable and （△ ＋ 2）- total-choosable if △ ≥ 16, and is A-edge-choosable and （△ ＋ 1）-total-ehoosable if △ ≥21. The second conclusion confirms the list coloring conjecture for the class of 1-planar graphs with large maximum degree.展开更多
The dephasing of molecular alignment can lead to the deformation of the alignment signal during its periodic revivals.Most studies are concentrated on the first few rotational revival periods of the molecular alignmen...The dephasing of molecular alignment can lead to the deformation of the alignment signal during its periodic revivals.Most studies are concentrated on the first few rotational revival periods of the molecular alignment and neglect the dephasing effect.However,study of the alignment dephasing is still of great significance for both the long-term dynamics of the molecular alignment and the dephasing itself.In this work,we theoretically demonstrate that the dephasing effect is correlated with both the rotational temperature and the rotational revival period of the molecules.The results present that the dephasing is especially significant for those molecules with long rotational revival period at high rotational temperatures.The physics behind it is explored by taking advantage of the coherence of the rotational quantum state population.This work deepens our understanding of rotational dynamics and rotational spectroscopy in molecular alignment.展开更多
Let G be a properly edge-colored graph. A rainbow matching of G is a matching in which no two edges have the same color. Let 5 denote the minimum degree of G. We show that if Iv（G）I 〉 （σ2 ＋ 14σ ＋ 1）/4, then G...Let G be a properly edge-colored graph. A rainbow matching of G is a matching in which no two edges have the same color. Let 5 denote the minimum degree of G. We show that if Iv（G）I 〉 （σ2 ＋ 14σ ＋ 1）/4, then G has a rainbow matching of size 6, which answers a question asked by G. Wang [Electron. J. Combin., 2011, 18： #N162] affirmatively. In addition, we prove that if G is a properly colored bipartite graph with bipartition （X, Y） and max{lXl, IYI} 〉 （σ2 ＋ 4σ - 4）/4, then G has a rainbow matching of size σ.展开更多
Graph coloring has interesting real life applications in optimization and network design. In this paper some new results on the acyclic-edge coloring, f-edge coloring, g-edge cover coloring, （g, f）-coloring and equi...Graph coloring has interesting real life applications in optimization and network design. In this paper some new results on the acyclic-edge coloring, f-edge coloring, g-edge cover coloring, （g, f）-coloring and equitable edge-coloring of graphs are introduced. In particular, some new results related to the above colorings obtained by the authors are given. Some new problems and conjectures are presented.展开更多
of main observation and conclusion We developed a method for comprehensively profiling drug-protein interactions using micro-column affinity purification(AP)combined with label-free quantitative(LFQ)proteomics as well...of main observation and conclusion We developed a method for comprehensively profiling drug-protein interactions using micro-column affinity purification(AP)combined with label-free quantitative(LFQ)proteomics as well as the statistical and bioinformatics analysis.FK506 was used as the experimental model for proof of concept.The true interacting proteins were distinguished from the background proteins by their fold changes of FLQ intensities combined with p-values.Totally 116 FK506 interacting proteins including 5 known target proteins were identified.The method was validated by using the LFQ intensity of the endogenous known drug targets together with statistical analysis.We demonstrated that the micro-column-based affinity purification in combination with LFQ proteomics provides a highly reproducible and robust approach for profiling drug-protein interactions.展开更多
文摘Offshore carbon dioxide(CO_(2)) geological storage(OCGS) represents a significant strategy for addressing climate change by curtailing greenhouse gas emissions. Nonetheless, the risk of CO_(2) leakage poses a substantial concern associated with this technology. This study introduces an innovative approach for establishing OCGS leakage scenarios, involving four pivotal stages, namely, interactive matrix establishment, risk matrix evaluation, cause–effect analysis, and scenario development, which has been implemented in the Pearl River Estuary Basin in China. The initial phase encompassed the establishment of an interaction matrix for OCGS systems based on features, events, and processes. Subsequent risk matrix evaluation and cause–effect analysis identified key system components, specifically CO_(2) injection and faults/features. Building upon this analysis, two leakage risk scenarios were successfully developed, accompanied by the corresponding mitigation measures. In addition, this study introduces the application of scenario development to risk assessment, including scenario numerical simulation and quantitative assessment. Overall, this research positively contributes to the sustainable development and safe operation of OCGS projects and holds potential for further refinement and broader application to diverse geographical environments and project requirements. This comprehensive study provides valuable insights into the establishment of OCGS leakage scenarios and demonstrates their practical application to risk assessment, laying the foundation for promoting the sustainable development and safe operation of ocean CO_(2) geological storage projects while proposing possibilities for future improvements and broader applications to different contexts.
文摘Let G be a properly colored bipartite graph. A rainbow matching of G is such a matching in which no two edges have the same color. Let G be a properly colored bipartite graph with bipartition (X,Y) and . We show that if , then G has a rainbow coloring of size at least .
基金The authors are grateful for the funding support provided by the Key R&D Program of Inner Mongolia Province of China(2021ZD0034)National Natural Science Foundation of China(Grant No.U1967208 and 42172315)Science and Technology Plan Project of Sichuan Prov-ince(2022YFSY0018).
文摘CO_(2) geological utilization and storage(CGUS)is an important technology to achieve a deep cut of global CO_(2) emissions.CO_(2) leakage from the subsurface may impair the performance of CGUS projects,and the CO_(2) leakage through wellbores is the most common leakage pathway.This paper proposes a workflow for wellbore CO_(2) leakage risk management,and the workflow consists of the following steps:i)leakage risk identification;ii)leakage risk evaluation;iii)leakage risk monitoring;iv)leakage handling.Representative approaches in each step of the workflow are systematically reviewed.Key challenges of wellbore CO_(2) leakage risk management include:lack of effective detection and evaluation approaches to tackle the CO_(2) leakage risk induced by cement failure;lack of low-cost acid resistance alloys and CO_(2)-resistant cement;lack of automated monitoring systems that could enable automated shutdowns of the wellbore whenever certain warning criteria are met.
文摘A graph is 1-planar if it can be drawn on the plane so that each edge is crossed by at most one other edge. In this paper, it is proved that each 1-planar graph with maximum degree △ is （A ＋ 1）-edge-choosable and （△ ＋ 2）- total-choosable if △ ≥ 16, and is A-edge-choosable and （△ ＋ 1）-total-ehoosable if △ ≥21. The second conclusion confirms the list coloring conjecture for the class of 1-planar graphs with large maximum degree.
基金supported by the National Natural Science Foundation of China(No.12004199).
文摘The dephasing of molecular alignment can lead to the deformation of the alignment signal during its periodic revivals.Most studies are concentrated on the first few rotational revival periods of the molecular alignment and neglect the dephasing effect.However,study of the alignment dephasing is still of great significance for both the long-term dynamics of the molecular alignment and the dephasing itself.In this work,we theoretically demonstrate that the dephasing effect is correlated with both the rotational temperature and the rotational revival period of the molecules.The results present that the dephasing is especially significant for those molecules with long rotational revival period at high rotational temperatures.The physics behind it is explored by taking advantage of the coherence of the rotational quantum state population.This work deepens our understanding of rotational dynamics and rotational spectroscopy in molecular alignment.
文摘Let G be a properly edge-colored graph. A rainbow matching of G is a matching in which no two edges have the same color. Let 5 denote the minimum degree of G. We show that if Iv（G）I 〉 （σ2 ＋ 14σ ＋ 1）/4, then G has a rainbow matching of size 6, which answers a question asked by G. Wang [Electron. J. Combin., 2011, 18： #N162] affirmatively. In addition, we prove that if G is a properly colored bipartite graph with bipartition （X, Y） and max{lXl, IYI} 〉 （σ2 ＋ 4σ - 4）/4, then G has a rainbow matching of size σ.
基金This research is supported by the National Natural Science Foundation of China under Grant Nos. 10871119, 10971121 and Quality Control Standards on Undergraduate Medical Education under Grant No. 200804220001.
文摘Graph coloring has interesting real life applications in optimization and network design. In this paper some new results on the acyclic-edge coloring, f-edge coloring, g-edge cover coloring, （g, f）-coloring and equitable edge-coloring of graphs are introduced. In particular, some new results related to the above colorings obtained by the authors are given. Some new problems and conjectures are presented.
基金This work was financially supported by the National NaturalScience Foundations of China(Nos.21775158,21375140,21175146)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB20020200).
文摘of main observation and conclusion We developed a method for comprehensively profiling drug-protein interactions using micro-column affinity purification(AP)combined with label-free quantitative(LFQ)proteomics as well as the statistical and bioinformatics analysis.FK506 was used as the experimental model for proof of concept.The true interacting proteins were distinguished from the background proteins by their fold changes of FLQ intensities combined with p-values.Totally 116 FK506 interacting proteins including 5 known target proteins were identified.The method was validated by using the LFQ intensity of the endogenous known drug targets together with statistical analysis.We demonstrated that the micro-column-based affinity purification in combination with LFQ proteomics provides a highly reproducible and robust approach for profiling drug-protein interactions.
