Abstract Nowadays, Fenton chemistry‐based chemodynamic therapy (CDT) is an emerging approach to killing tumor cells by converting endogenous H 2 O into cytotoxic hydroxyl radicals (·OH). However, the elimination of ·OH intracellular overexpressed glutathione (GSH) results in unsatisfactory antitumor efficiency. In addition, single mode consuming GSH and undesirable drug loading efficiency cannot guarantee efficient cancer effect. Herein, a simple one‐step strategy for construction Fe 3+...

A cubic porphyrin-based covalent organic framework (COF) named CTP with excellent hydrophilicity was prepared a facile method for the first time. Different from conventional methods synthesis of COFs, this strategy has greatly shortened reaction time under mild conditions. Linking porphyrin monomer into COF overcame its poor solubility and biocompatibility also narrowed band gap owing to formation π-conjugation structure. The improved enabled be an sonosensitizer enhanced sonodynamic effect....

Based on the productivity equation of coalbed methane (CBM) well, considering impact coal reservoir reformability gas well productivity, main production layer optimization index in "three-step method" optimal combination layers is corrected, and then CBM potential introduced to evaluate favorable areas for commingled multi-coal seam production. Through analysis key parameters reservoirs affecting index, a development unit division method with seams established, quantitative grading system...

Considering the characteristics that fracture conductivity formed by hydraulic fracturing varies across space and time, a new mathematical model was established for seepage flow in tight gas fractured vertical wells which takes into account effects of dual variable stress sensitivity. The Blasingame advanced production decline curves were obtained using finite element method with hybrid elements. On this basis, time sensitivity on curve analyzed. study shows mainly reduces value at early...

As an emerging anti-tumor strategy, chemodynamic therapy (CDT) utilizes a Fenton/Fenton-like reaction to generate highly toxic hydroxyl radicals kill tumor cells. However, the efficiency of CDT is still hindered by low rate. Herein, we report combination ion interference (IIT) and via amorphous iron oxide (AIO) nanomedicine with encapsulated EDTA-2Na (EDTA). Iron ions EDTA are released from in acidic tumors chelate form ion-EDTA, which improves promotes generation reactive oxygen species...

The current electromagnetism environment is fast changing and levity, the methods for evaluation Suppont vector machine (SVM) kernel functions which are used in radar signal recognition can not suit it. So space separate, stability parameter numbers were proposed this paper to review performance of function, a novel method estimating function was designed. By simulation, estimate roundly, choose best different application demand recognition.

Minimum redundancy array (MRA) has the maximum aperture with continuous difference co-array among various sparse arrays same number of physical sensors, but it is hard to calculate sensor position MRA and realize design by using MRA. To solve those problem, generalized proposed mutual coupling limitation easy calculation method position. Based on configuration, a high-precision underdetermined direction arrival (DOA) estimation reduced computational complexity. In this method, fast...

An L-parallel coprime array is designed and an Off-grid sparse learning via iterative minimization (OGSLIM) algorithm proposed in order to improve the performance of Two-dimensional direction-of-arrival (2-D DOA) estimation. The consists two parts, one a parallel other linear perpendicular array. OGSLIM based on Bayesian framework can learn offi-grid parameter. Theory analysis simulation results demonstrate that 2-D DOA estimation using with lead higher accuracy resolution, it also fits...

The parameters of radar emitter are fast changing in the current complicated electro magnetic environment, and recognition rate which used single sensor method cannot satisfied. To solve problem, an improved based on Dezert-Smarandache theory is proposed, can improve proportional conflict redistribution rule to fuzzy conflicting information from emitter. Some examples given show validity method.

Aiming on the problem of low precision and cross term in conventional method multi-component LFM signal detection parameter estimation. A time-frequency associated analyzed based wavelet transform reassignment Hough is propased. Overcome interferences by transform, guarantee accuracy reassignment, use distribution after as image, then achieves interception component estimate transform. Simulation results show that this feasible.

Doppler frequency rate-of-change of a radar signal is an important parameter in passive location, but it too subtle to accurately estimate single pulse. In this paper, algorithm estimation presented. A new chirp obtained after intrapulse correlation accumulation by using discrete Fourier transform (DFT). Dechirping the can quickly and obtain value. The simulation results prove that feasible its performance inclines Cramer-Rao lower bound (CRLB).

In this paper, we provide a novel idea to achieve underdetermined direction of arrival (DOA) estimation for sparse array by introducing covariance matrix reconstruction into sparsity-based algorithms. Based on the Toeplitz property uniform linear array, vector sparsely representation (CVSR) model is established and DOAs can be retrieved through reconstruction. Moreover, transformed as convex optimization problem with less constraints solved proposed original (OCMR). Finally, CVSR more...

Aiming at the shortly SNR capability of wavelet-ridge in extracting in-pulse features LFM signal, this paper, a time-frequency associated analyzed method based on wavelet transform and reassignment is proposed.. The LFM's scalogram, combined with ridge. With help improving agglomeration representations, enhanced. result emulation experiments approved feasibility method.

In this paper, a novel rectangular sparse array with hole-free difference co-arrays and low coupling effect is proposed, while reconstruction algorithm of partial grid also proposed for 2-D DOA estimation. Firstly, the nested Toeplitz characteristic covariance matrix uniform analysed estimated. Based on precisely estimated matrix, we establish representation model vector achieve estimation by (PGCVSR). Simulation results demonstrate that our can superior performance high accuracy.

In this paper, we propose a low complexity DOA estimation algorithm based on fast Bayesian compressive sensing for co-prime array with compressed inter-element spacing structure. Firstly, prove that cross-correlation matrix of the two subarrays have already contained all virtual elements. Then is built only instead traditional covariance to reduce computational complexity. Secondly conduct sparse representation and real-valued extension output algorithm. kinds methods are introduced deal...

The information of target's acceleration is reflected in the Doppler frequency rate-of-change received radar signal. Limited velocity, very subtle. This quite difficult to measure precisely since it subtle and pulse duration short. Therefore, a precise method proposed this based on Morlet wavelet transform. transform has low signal-to-noise ratio (SNR) threshold. According as auto correlating coefficient signal, Frequency enhanced phase ambiguity unwrapped. By exploiting coherent property...

Aiming on the problem of low precision and crossterm in conventional method analyzing polynomial FM signal. The that based wavelet transform time-frequency reassignment is proposed. Not only overcomes contradiction between crossterms signal approximate centering, but also good at reducing noise. In this paper, principle application wavelet-reassignment are summarized, analysis made other methods. simulation results show novel has compositive advantages.

To achieve underdetermined 2-D DOA estimation of signals in different band, a novel integrated sparse array based on four rectangular subarrays with reduced coupling effect and estimator via matrix completion are proposed. Firstly, the concept original uniform (ORUA) is proposed nested Toeplitz characteristic covariance analysed. Then estimated quickly by augmented Lagrange multiplier. Based precisely matrix, we unitary-ESPRIT. Simulation results demonstrate that our algorithm can superior...

Compared with uniform arrays, sparse arrays can achieve same estimation accuracy and degrees of freedom (DOFs) less sensors reduced mutual coupling, so a novel parallel linear array to undetermined two-dimensional (2-D) DOA is proposed. To improve the sparsity-based estimator, this paper introduce Low-rank matrix model for precise covariance reconstruction propose vector representation(CVSR) 1-D estimation. Moreover, TLS-CVSR based on proposed estimator CVSR 2-D By implementing simulation...