In this paper, a notion of negative side ρ \|mixing ( ρ\+- \|mixing) which can be regarded as asymptotic negative association is defined, and some Rosenthal type inequalities for ρ\+- \|mixing random fields are est...In this paper, a notion of negative side ρ \|mixing ( ρ\+- \|mixing) which can be regarded as asymptotic negative association is defined, and some Rosenthal type inequalities for ρ\+- \|mixing random fields are established. The complete convergence and almost sure summability on the convergence rates with respect to the strong law of large numbers are also discussed for ρ\+-\| mixing random fields. The results obtained extend those for negatively associated sequences and ρ\+*\| mixing random fields.展开更多
In this paper, some test statistics of Kolmogorov type and Cramervon Mises type based on projection pursuit technique are proposed for testing the sphericity problem of a high\|dimensional distribution. The limiting d...In this paper, some test statistics of Kolmogorov type and Cramervon Mises type based on projection pursuit technique are proposed for testing the sphericity problem of a high\|dimensional distribution. The limiting distributions of the test statistics are derived under the null hypothesis. The asymptotic properties of Bootstrap approximation are investigated and the tail behaviors of the statistics are studied.展开更多
This paper reports the primary results of the study. on the regioselectivity of the cyclization reaction of 5-amino-1, 2, 4-triazole and its analogues until asym-1, 3-dicarbonyl compounds. The mechanistic explanation ...This paper reports the primary results of the study. on the regioselectivity of the cyclization reaction of 5-amino-1, 2, 4-triazole and its analogues until asym-1, 3-dicarbonyl compounds. The mechanistic explanation for the regioselectivity is presented.展开更多
In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum c...In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum channel. The optimal discrimination between two nonorthogonal quantum states is adopted. It is shown that an unknown two-particle entangled state can be probabilistically teleported from the sender to the remote receiver on condition that the co-sender successfully collaborates. The fidelity in this protocol is one. In addition, the probability of the successful teleportation is calculated and all kinds of transformations performed by the sender and the receiver are provided in detail.展开更多
Chiral C2-symmetric N-heterocyclic carbene （NHC） palladium diaquo complex 5b prepared from （S）-BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to giv...Chiral C2-symmetric N-heterocyclic carbene （NHC） palladium diaquo complex 5b prepared from （S）-BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to give the corresponding products in moderate enantioselectivities along with good to excellent yields.展开更多
目的通过比较非对称回波的最小二乘估算法迭代水脂分离(iterative decomposition of water and fat withecho asymmetric and least-squares estimation,IDEAL)技术中T_2加权成像(T_2weighted imaging,T_2WI)和短时间反转恢复(short tim...目的通过比较非对称回波的最小二乘估算法迭代水脂分离(iterative decomposition of water and fat withecho asymmetric and least-squares estimation,IDEAL)技术中T_2加权成像(T_2weighted imaging,T_2WI)和短时间反转恢复(short time inversion recovery,STIR)序列的图像质量,探讨两种脂肪抑制技术在颈椎前路术后患者核磁共振成像(magnetic resonance imaging,MRI)中的应用价值。方法回顾性分析20例颈椎前路术后患者的矢状面IDEAL-T_2WI和STIR序列的MRI。比较两组间金属伪影面积的大小、总体图像质量、脊髓的可见性以及脂肪抑制的均匀性。结果 IDEAL-T_2WI和STIR序列图像的平均金属伪影面积分别为(786±398)mm2和(774±394)mm^2,二者的差异无统计学意义(P=0.329)。在脊髓的可见性方面,二者的差异无统计学意义(P=0.317)。而在总体图像质量和脂肪抑制的均匀性方面,IDEAL-T_2WI序列的图像均优于STIR序列(P<0.05)。结论在颈椎前路术后患者的3.0T MRI中,I-DEAL-T_2WI序列可以替代STIR序列作为最佳的脂肪抑制技术。展开更多
文摘In this paper, a notion of negative side ρ \|mixing ( ρ\+- \|mixing) which can be regarded as asymptotic negative association is defined, and some Rosenthal type inequalities for ρ\+- \|mixing random fields are established. The complete convergence and almost sure summability on the convergence rates with respect to the strong law of large numbers are also discussed for ρ\+-\| mixing random fields. The results obtained extend those for negatively associated sequences and ρ\+*\| mixing random fields.
文摘In this paper, some test statistics of Kolmogorov type and Cramervon Mises type based on projection pursuit technique are proposed for testing the sphericity problem of a high\|dimensional distribution. The limiting distributions of the test statistics are derived under the null hypothesis. The asymptotic properties of Bootstrap approximation are investigated and the tail behaviors of the statistics are studied.
文摘This paper reports the primary results of the study. on the regioselectivity of the cyclization reaction of 5-amino-1, 2, 4-triazole and its analogues until asym-1, 3-dicarbonyl compounds. The mechanistic explanation for the regioselectivity is presented.
基金the Hi-Tech Research and Development Program of China（2006AA01Z419）the National Natural Science Foundation of China（90604023）+2 种基金the National Laboratory for Modem Communications Science Foundation of China（9140C1101010601）the Natural Science Foundation of Beijing（4072020）the ISN Open Foundation.
文摘In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum channel. The optimal discrimination between two nonorthogonal quantum states is adopted. It is shown that an unknown two-particle entangled state can be probabilistically teleported from the sender to the remote receiver on condition that the co-sender successfully collaborates. The fidelity in this protocol is one. In addition, the probability of the successful teleportation is calculated and all kinds of transformations performed by the sender and the receiver are provided in detail.
文摘Chiral C2-symmetric N-heterocyclic carbene （NHC） palladium diaquo complex 5b prepared from （S）-BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to give the corresponding products in moderate enantioselectivities along with good to excellent yields.
文摘目的通过比较非对称回波的最小二乘估算法迭代水脂分离(iterative decomposition of water and fat withecho asymmetric and least-squares estimation,IDEAL)技术中T_2加权成像(T_2weighted imaging,T_2WI)和短时间反转恢复(short time inversion recovery,STIR)序列的图像质量,探讨两种脂肪抑制技术在颈椎前路术后患者核磁共振成像(magnetic resonance imaging,MRI)中的应用价值。方法回顾性分析20例颈椎前路术后患者的矢状面IDEAL-T_2WI和STIR序列的MRI。比较两组间金属伪影面积的大小、总体图像质量、脊髓的可见性以及脂肪抑制的均匀性。结果 IDEAL-T_2WI和STIR序列图像的平均金属伪影面积分别为(786±398)mm2和(774±394)mm^2,二者的差异无统计学意义(P=0.329)。在脊髓的可见性方面,二者的差异无统计学意义(P=0.317)。而在总体图像质量和脂肪抑制的均匀性方面,IDEAL-T_2WI序列的图像均优于STIR序列(P<0.05)。结论在颈椎前路术后患者的3.0T MRI中,I-DEAL-T_2WI序列可以替代STIR序列作为最佳的脂肪抑制技术。
