No abstract

No abstract

No abstract

We develop hetero-nanostructured black phosphorus/metal-organic framework hybrids formed by P-O-Co covalent bonding based on ad esigned droplet microfluidic strategy consisting of confined and ultrafast microdroplet reactions.T he resulting hybrid exhibits large capacitance (1347 Fg À1 )i nK OH electrolytes due to its large specificsurface-area (632.47 m 2 g À1 ), well-developed micro-porosity (0.38 cm 3 g À1 ), and engineered electroactivity.F urthermore, the proposed 3D printing method allows to construct allintegrated solid-state supercapacitor,w hich maintains interconnected porous network, good interfacial adhesion, and robust flexibility for short-path diffusion and excessive accommodation of ions.C onsequently,t he fabricated flexible supercapacitor delivers ultrahigh volumetric energy density of 109.8 mWh cm À3 ,l arge capacitance of 506 Fcm À3 ,a nd good long-term stability of 12000 cycles.

No abstract

No abstract

This paper considers the waveform design problem for multiple-input multiple-output (MIMO) radars in order to improve the detection performance of the systems. We assume that target echoes are embedded in (signal-dependent) clutter as well as (colored) interference. Considering the optimal (Neyman-Pearson) detector, obtaining waveforms which maximize the detection probability for a fixed value of the probability of false alarm is intractable. Therefore, we employ relative entropy associated with the detection problem as the figure of merit for the waveform design. We devise an iterative method based on minorization-maximization (MM) technique to tackle the non-convex design problem.This method also includes a novel trick for replacing a non-convex constraint set (associated with an equivalent form of the design problem) with a convex one iteratively. The proposed method increases the design metric monotonically and is guaranteed to converge. We extend the devised method for using in design with peak-to-average power ratio (PAR) and similarity constraints. The method can be applied , IEEE Transactions on Signal Processing 2 to both statistical and colocated MIMO radars. Several numerical examples are included to demonstrate the effectiveness of the proposed method.

No abstract