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The working fluid plays an important role in the flow and heat transfer performance of impingement jet. Though a lot of fluids such as air, water and oil, have been widely used in jet applications, there lack research works focus on the impacts of fluid properties on the overall heat transfer performance. This paper made comprehensive comparisons of five jet fluids (air, helium, water, FC-77 and MIL-7808)...
The time-domain response is analyzed by precise integration method in condition of non-uniform coupled transmission lines in this paper. Different to the traditional method, this method directly analyzes it according to the non-uniformity of non-uniform transmission lines so as to avoid decoupling the coupled telegraph equations. The accuracy and speed of the analysis are improved greatly. It is a...
In this paper, an improved physics-based model is introduced for vias embedded in layered media between two parallel-plate pairs. The model is constituted by upper and lower via-to-plane capacitances and equivalent impedance matrix of the parallel-plate cavity. The via-to-plate capacitance is extracted by Q3D and the parallel-plate impedance is calculated by using the cavity resonator method (CRM)...
Cloud storage is an important service of cloud computing, which offers services for data owners to host their data in the cloud. But cloud computing also brings new and challenging security threats to the outsourced data. In order to regain security assurances and access control in the cloud storage, we analyzes the access control algorithm of Ciphertext-policy attribute-based encryption. In this...
We report efficient coupling of nanoemitters and single-mode fibers. 7.4% of the total emitted photons from single CdSe/ZnS nanocrystals were directly coupled into 300-nm-diameter tapered fibers and were output from the single-mode fiber ends.
Because of the special imaging mechanism of Synthetic Aperture Radar (SAR) and the existence of the speckle noise, SAR target configuration recognition has been a hard task in SAR target recognition. We propose a method of SAR target configuration recognition by using the Locality Preserving Projections (LPP), which is a subspace analytical method based on manifold learning. The proposed method extracts...
We report our recent experimental demonstration of a KLM CNOT gate[1], a photonic quantum circuit to combine two efficient ‘artificial’ nonlinear elements. This experimental demonstration[2] confirms the first step in the KLM ‘recipe’ for all-optical quantum computation, and should be useful for on-demand entanglement generation and purification. We will also report our activities toward the realization...
Three schemes are adopted, which are combined with different spray angle of nozzles and spray penetration of the HSDI diesel. By means of FIRE software, the engine performances are predicated based on the key parameters, such as fuel-air equivalence ratio, flow velocity, NOx and soot concentration, and the combustion, NOx and soot's formation process are analyzed. If the fuel spray process could promote...
In this paper, a new method for question classification is proposed, which employs ensemble learning algorithms to train multiple question classifiers. These component learners are combined to produce the final hypothesis. In detail, the feature spaces are obtained through extracting high-frequency keywords from questions corpus and the method of word semantic similarity is performed to adjust the...
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