A new method for translating a fuzzy rough set to a fuzzy set is introduced and the fuzzy approximation of a fuzzy rough set is given. The properties of the fuzzy approximation of a fuzzy rough set are studied and a f...A new method for translating a fuzzy rough set to a fuzzy set is introduced and the fuzzy approximation of a fuzzy rough set is given. The properties of the fuzzy approximation of a fuzzy rough set are studied and a fuzzy entropy measure for fuzzy rough sets is proposed. This measure is consistent with similar considerations for ordinary fuzzy sets and is the result of the fuzzy approximation of fuzzy rough sets.展开更多
Function S-rough sets has the properties of dynamics, heredity, and memory. Function S-rough sets is penetrated and crossed with the issue of economic law forecast, then a new forecast model based on function S-rough ...Function S-rough sets has the properties of dynamics, heredity, and memory. Function S-rough sets is penetrated and crossed with the issue of economic law forecast, then a new forecast model based on function S-rough sets namely the two law forecast model is proposed, which includes upper law forecast model and lower law forecast model; and its＇ implement algorithm is given. Finally, the validity of the model is demonstrated by the forecast for region economic development of Hainan Province.展开更多
目的探讨黄芪补血汤联合厄贝沙坦在伴脑梗死老年H型高血压病患者中的应用效果。方法2020年1月—2022年12月该院收治的60例老年H型高血压病伴脑梗死患者,根据随机数表法将其分为甲组和乙组,每组30例。甲组单纯予以厄贝沙坦治疗,乙组在甲...目的探讨黄芪补血汤联合厄贝沙坦在伴脑梗死老年H型高血压病患者中的应用效果。方法2020年1月—2022年12月该院收治的60例老年H型高血压病伴脑梗死患者,根据随机数表法将其分为甲组和乙组,每组30例。甲组单纯予以厄贝沙坦治疗,乙组在甲组基础上采用黄芪补血汤治疗。观察高血压病疗效、血管内皮功能、同型半胱氨酸(homocysteine,Hcy)水平及神经功能缺损情况。结果乙组总有效率明显高于甲组,差异有统计学意义(P<0.05);两组治疗后的血清一氧化氮(nitric oxide,NO)水平均高于治疗前,内皮素-1(endothelin 1,ET-1)水平均低于治疗前,且乙组NO水平高于甲组,ET-1水平低于甲组,差异有统计学意义(P<0.05);两组治疗后的Hcy水平及美国国立卫生研究院卒中量表(national Institutes of Health Stroke Scale,NIHSS)评分均低于治疗前,且乙组较甲组低,差异有统计学意义(P<0.05)。结论黄芪补血汤联合厄贝沙坦可显著改善老年H型高血压病伴脑梗死患者血压控制效果及血管内皮功能,同时可降低Hcy水平,减轻患者神经功能缺损。展开更多
A novel method for synthesis of quinazoline through the hydrogen transfer/annulation reaction using 2-nitrobenzyl alcohol and benzylamine as starting materials is presented.The reaction is catalyzed by a ruthenium(II)...A novel method for synthesis of quinazoline through the hydrogen transfer/annulation reaction using 2-nitrobenzyl alcohol and benzylamine as starting materials is presented.The reaction is catalyzed by a ruthenium(II)complex bearing a N-heterocyclic carbene nitrogen phosphine(CNP)ligand.The pronouncedα-donating capacity of the carbene within the CNP ligand of the catalyst plays a crucial role in stabilizing the catalytically active species.Additionally,the hemilability of the nitrogen facilitates the creation of coordination vacancies,which are essential for the activation of reaction substrate molecules.The synergistic interplay between these two functionalities markedly enhances catalytic efficiency.This catalytic system shows the significant catalytic activity and selectivity,along with a broad substrate adaptability.All substrates yield the target product in good to excellent yields with the maximum yield reaching 95%.Control experiments have substantiated that benzaldehyde and phenylmethanimine may serve as intermediates in the reaction,thereby reinforcing the role of benzylamine as both a hydrogen donor and a nitrogen source in the process.展开更多
基金the National Natural Science Foundation of China (60364001, 70461001)Hainan ProvincialNatural Science Foundation of China (80401).
文摘A new method for translating a fuzzy rough set to a fuzzy set is introduced and the fuzzy approximation of a fuzzy rough set is given. The properties of the fuzzy approximation of a fuzzy rough set are studied and a fuzzy entropy measure for fuzzy rough sets is proposed. This measure is consistent with similar considerations for ordinary fuzzy sets and is the result of the fuzzy approximation of fuzzy rough sets.
基金supported by the National Natural Science Foundation of China (60364001, 70461004)the Hainan Provincial Natural Science Foundation of China (807054)Hainan Provincial Eduction Office Foundation (HJ2008-56).
文摘Function S-rough sets has the properties of dynamics, heredity, and memory. Function S-rough sets is penetrated and crossed with the issue of economic law forecast, then a new forecast model based on function S-rough sets namely the two law forecast model is proposed, which includes upper law forecast model and lower law forecast model; and its＇ implement algorithm is given. Finally, the validity of the model is demonstrated by the forecast for region economic development of Hainan Province.
文摘目的探讨黄芪补血汤联合厄贝沙坦在伴脑梗死老年H型高血压病患者中的应用效果。方法2020年1月—2022年12月该院收治的60例老年H型高血压病伴脑梗死患者,根据随机数表法将其分为甲组和乙组,每组30例。甲组单纯予以厄贝沙坦治疗,乙组在甲组基础上采用黄芪补血汤治疗。观察高血压病疗效、血管内皮功能、同型半胱氨酸(homocysteine,Hcy)水平及神经功能缺损情况。结果乙组总有效率明显高于甲组,差异有统计学意义(P<0.05);两组治疗后的血清一氧化氮(nitric oxide,NO)水平均高于治疗前,内皮素-1(endothelin 1,ET-1)水平均低于治疗前,且乙组NO水平高于甲组,ET-1水平低于甲组,差异有统计学意义(P<0.05);两组治疗后的Hcy水平及美国国立卫生研究院卒中量表(national Institutes of Health Stroke Scale,NIHSS)评分均低于治疗前,且乙组较甲组低,差异有统计学意义(P<0.05)。结论黄芪补血汤联合厄贝沙坦可显著改善老年H型高血压病伴脑梗死患者血压控制效果及血管内皮功能,同时可降低Hcy水平,减轻患者神经功能缺损。
文摘A novel method for synthesis of quinazoline through the hydrogen transfer/annulation reaction using 2-nitrobenzyl alcohol and benzylamine as starting materials is presented.The reaction is catalyzed by a ruthenium(II)complex bearing a N-heterocyclic carbene nitrogen phosphine(CNP)ligand.The pronouncedα-donating capacity of the carbene within the CNP ligand of the catalyst plays a crucial role in stabilizing the catalytically active species.Additionally,the hemilability of the nitrogen facilitates the creation of coordination vacancies,which are essential for the activation of reaction substrate molecules.The synergistic interplay between these two functionalities markedly enhances catalytic efficiency.This catalytic system shows the significant catalytic activity and selectivity,along with a broad substrate adaptability.All substrates yield the target product in good to excellent yields with the maximum yield reaching 95%.Control experiments have substantiated that benzaldehyde and phenylmethanimine may serve as intermediates in the reaction,thereby reinforcing the role of benzylamine as both a hydrogen donor and a nitrogen source in the process.
