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Luzhou, China

Zhang K.,Dalian University of Technology | Dai Y.,Sichuan Police College | Zhang X.,Dalian University of Technology | Xiao Y.,Dalian University of Technology
Dyes and Pigments | Year: 2013

Three novel ladder-conjugated chromophores indicated as LT1-LT3 were synthesized and characterized. Further studies on linear, nonlinear optics and electrochemical properties demonstrated their photophysical features respectively. Compound LT1 shows good two-photon absorption cross-section (δ) up to~1200GM at 810nm in tetrahydrofuran, which is attributed to intramolecular charge transfer effect, as supported by density functional theory theoretical calculations. Compound LT2 and LT3 show considerable molar extinction coefficients, which are more than 105, and higher quantum yields. Structure-function relationship is further discussed, suggesting a rational strategy to develop ladder-conjugated small molecules. © 2013 Elsevier Ltd. Source

Liu Y.-Z.,Sichuan Police College | Qian B.-Y.,Southwest Jiaotong University
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | Year: 2011

Aimed for the rational limitation of decision-maker, the multi-objective lattice-order decision-making method was introduced into the scheme selection of rail transit network. The evaluation index system of multi-objective lattice-order decision-making for urban rail transit network was constructed. Each index was turned into dimensionless number according to its type. The relative weights of evaluation indexes were worked out by synthesizing the subjective ones of decision-makers and the objective ones of data discrete degrees. Combining with decision matrix, the comprehensive difference degree of each scheme was calculated in order to achieve the lattice order of alternative schemes, and the decision-making method was applied to evaluate four rail transit network plans of some city. Analysis result shows that the comprehensive difference values of four plans are 0.66, 0.56, 0.24, 0.83 respectively, and the order result is consistent with actual situation, so the method is rational. Source

Yu H.,Dalian University of Technology | Jin L.,Dalian University of Technology | Dai Y.,Sichuan Police College | Li H.,Dalian University of Technology | Xiao Y.,Dalian University of Technology
New Journal of Chemistry | Year: 2013

Based on a FRET scaffold bearing BODIPY and TMR fluorophores, a ratiometric fluorescent probe BRP-NO highly sensitive and selective to nitric oxide was developed and employed for imaging intracellular nitric oxide released from NOC13. © 2013 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. Source

Hu G.,Sichuan Police College
ICCET 2010 - 2010 International Conference on Computer Engineering and Technology, Proceedings | Year: 2010

The paper tries to have made a study of the security keys of USB, which can achieve these functions such as data encryption, digital signature, and identity authentication. Based on the analysis of the security key system, the paper also introduces its formation, functions and cryptosystem while putting forward a file encryption project on the basis of the USB security key. The project adopts the combination of soft hardware, the software conducting the process of file encryption and hardware taking charge of the management of secret key and the encryption of session key. The project makes a full use of the respective advantages upon the Symmetetric-key cryptosystems and the Publed-key cryptosystem, which means to encrypt the electronic documents by using the algorithms of the Symmetetric-key cryptosystems and transmit its secret key by employing the ones of the Public-key cryptosystem. Simultaneously, the validation of the informative integrity and authenticity have been realized by the use of information abstract algorithms. With high secrity, high efficiency and user-friendliness, the project achieves the file encryption with the strong extendibility of the system on the basis of the characteristics of USB security key. © 2010 IEEE. Source

Gao Y.,CAS Institute of Electronics | Yu W.,CAS Institute of Electronics | Liu Y.,CAS Institute of Electronics | Wang R.,CAS Institute of Electronics | Shi C.,Sichuan Police College
IEEE Geoscience and Remote Sensing Letters | Year: 2014

A novel autofocusing technique is developed for image from stripmap-mode synthetic aperture radar (SAR) data. The approach is based on maximizing the image sharpness function that induces the solution to maximum-posterior estimation. In this letter, closed-form expressions are derived for the gradients of the sharpness function with respect to the coefficients of the polynomial expansion, which makes the use of conjugate gradient algorithm available. Additionally, we also design a modified adaptive-order searching strategy, and it helps to remarkably reduce the computational load while maintaining the accuracy. Real airborne SAR data experiments and comparisons demonstrate the validity and effectiveness of the proposed algorithm. © 2004-2012 IEEE. Source

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