It’s important for mobile operators to recommend new services. Traditional method is sending advertising messages to all mobile users. But most of users who are not interested in these services treat the messages as ...It’s important for mobile operators to recommend new services. Traditional method is sending advertising messages to all mobile users. But most of users who are not interested in these services treat the messages as Spam. This paper presents a method to find potential customers who are likely to accept the services. This method searchs the maximum frequent itemsets which indicate potential customers’ features from a large data set of users’ information, then find potential customers from those maximum frequent itemsets by using a bayesian network classifier. Experimental results demonstrate this method can select users with higher accuracy.展开更多
Organic radicals feature versatile unpaired electrons key for photoelectronic and biomedical applications but remain difficult to access in stable concentrated forms.We disclose easy generation of stable,concentrated ...Organic radicals feature versatile unpaired electrons key for photoelectronic and biomedical applications but remain difficult to access in stable concentrated forms.We disclose easy generation of stable,concentrated radicals from various alkynyl phenyl motifs,including 1)sulfur-functionalized alkyne-rich organic linkers in crystalline frameworks;2)the powders of these molecules alone;3)simple diethynylbenzenes.For Zr-based framework,the generation of radical-rich crystalline framework was achieved by thermal annealing in the range of 300-450℃.For terminal alkynes,electron paramagnetic resonance signals(EPR,indicative of free radicals)arise after air exposure or mild heating(e.g,70℃).Further heating(e.g.,150℃for 3 h)raises the radical concentrations up to 3.30 mol kg^(-1).For more stable internal alkynes,transformations into porous radical solids can also be triggered,albeit at higher temperatures(e.g.,250-500℃).The resulted radical-containing solids are porous,stable to air as well as heat(up to 300-450℃)and exhibit photothermal conversion and solar-driven water evaporation capacity.The formation of radicals can be ascribed to extensive alkyne cycliza-tions,forming defects,dangling bonds and the associated radicals stabilized by polycyclicπ-systems.展开更多
文摘It’s important for mobile operators to recommend new services. Traditional method is sending advertising messages to all mobile users. But most of users who are not interested in these services treat the messages as Spam. This paper presents a method to find potential customers who are likely to accept the services. This method searchs the maximum frequent itemsets which indicate potential customers’ features from a large data set of users’ information, then find potential customers from those maximum frequent itemsets by using a bayesian network classifier. Experimental results demonstrate this method can select users with higher accuracy.
基金fundings by the National Natural Science Foundation of China(22371054,22301045)the Foundation of Basic and Applied Basic Research of Guangdong Province(2020B1515120024,2024A1515012801)+1 种基金Science and Technology Planning Project of Guangdong Province(2021A0505030066,2023A0505050164)Z.X.acknowledges a startup fund from A^(*)STAR(SC25/22-119116).
文摘Organic radicals feature versatile unpaired electrons key for photoelectronic and biomedical applications but remain difficult to access in stable concentrated forms.We disclose easy generation of stable,concentrated radicals from various alkynyl phenyl motifs,including 1)sulfur-functionalized alkyne-rich organic linkers in crystalline frameworks;2)the powders of these molecules alone;3)simple diethynylbenzenes.For Zr-based framework,the generation of radical-rich crystalline framework was achieved by thermal annealing in the range of 300-450℃.For terminal alkynes,electron paramagnetic resonance signals(EPR,indicative of free radicals)arise after air exposure or mild heating(e.g,70℃).Further heating(e.g.,150℃for 3 h)raises the radical concentrations up to 3.30 mol kg^(-1).For more stable internal alkynes,transformations into porous radical solids can also be triggered,albeit at higher temperatures(e.g.,250-500℃).The resulted radical-containing solids are porous,stable to air as well as heat(up to 300-450℃)and exhibit photothermal conversion and solar-driven water evaporation capacity.The formation of radicals can be ascribed to extensive alkyne cycliza-tions,forming defects,dangling bonds and the associated radicals stabilized by polycyclicπ-systems.
