1 从阵列天线三维成像角度解决被动传感器网络多目标定位问题; 2 采用双站距离空间投影方法解决大区域成像的分辨率空变问题; 3 针对图像的稀疏特性,采用贪婪清除策略解决投影过程中主瓣遮挡和旁瓣串扰问题。 从阵列天线三维成像角度解决被动传感器网络多目标定位问题; 采用双站距离空间投影方法解决大区域成像的分辨率空变问题; 针对图像的稀疏特性,采用贪婪清除策略解决投影过程中主瓣遮挡和旁瓣串扰问题。
We make four contributions in this paper. First, we provide a core of macroeconomic time series usable for systematic research on China. Second, we document, through various empirical methods, the robust findings about striking patterns of trend and cycle. Third, we build a theoretical model that accounts for these facts. Fourth, the model's mechanism and… (More)
In the title compound, C(22)H(18)N(4)O(2)S, the seven-membered ring generated by an intra-molecular N-H⋯O hydrogen bond adopts an envelope conformation in both of the two independent mol-ecules in the asymmetric unit. In the crystal, mol-ecules are linked into C(9) chains along  by N-H⋯O hydrogen bonds. The mol-ecules are also weakly linked by C-H⋯O… (More)
The title complex, [Ni(C(12)H(11)N(2)O(2))(2)(C(3)H(7)NO)(2)], lies on on an inversion center. The Ni(II) ion is coordinated in a slightly distorted octa-hedral coordination enviroment by four O atoms from two bis-chelating 4-acety-3-methyl-1-phenyl-1H-pyrazol-5-olate ligands in the equatorial plane and two O atoms from two N,N-dimethyl-formamide ligands in… (More)
The mol-ecule of the title compound, C(22)H(23)N(3)O(3), exists in the enamine-keto form. A strong intra-molecular N-H⋯O hydrogen bond occurs, generating an S(6) ring. The dihedral angle between the heterocycle and the adjacent phenyl ring is 3.75 (15)°.