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Qin Z.,North China University of Water Conservancy and Electric Power | Li X.,Henan economics and Trade Vocational College | Zhou M.,Henan economics and Trade Vocational College
Journal of the Chinese Chemical Society | Year: 2014

The intermolecular hydrogen-bonds between proflavine cation (PC) and water molecules are investigated by density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods. The ground-state geometry optimizations, electronic excitation energies and corresponding oscillation strengths of the low-lying electronically excited states for the isolated proflavine cation, the hydrogen-bonded PC-H2O dimer and PC-(H2O)2 trimer are calculated. Intermolecular hydrogen bonds at the central site of proflavine molecule are found to be stronger than the peripheral site. The hydrogen bond N-H×××O for the hydrogen-bonded dimer are indicated to be weakened in the excited states, since the excitation energy is increased slightly comparing to the monomer. Hydrogen bonds of PC-(H2O)2 trimer with the same type as the dimer are strengthened in the excited state, which is demonstrated by the decrease of the excited energies. Thus, hydrogen bond strengthening and weakening are observed to reveal site dependent feature in proflavine molecule. Furthermore, the hydrogen bond at central site induces the blue-shift of the absorption spectrum, while the ones at peripheral site induce red-shift. Hydrogen bonds with the same type at peripheral and central sites of proflavine molecule provide different effects on the photochemical and photophysical properties of proflavine. © 2014 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany.


Li Y.-Q.,Henan economics and Trade Vocational College | Zhang C.-T.,Henan economics and Trade Vocational College
Applied Mechanics and Materials | Year: 2013

In order to improve the performance of the query optimization for the distribute database, an improved query optimization algorithm was proposed based on the genetic algorithm. The query execution cost model based on the genetic algorithm was proposed in this paper. The distributed database was emerged in the 70's of the last century and developed with the progress of the computer technology and network technology, the distributed database was the database system which is distributed storage dispersedly in physics and with centralized processing in mathematic logic. Because the storage points were not uniform, the structure of the distributed database is much more complicated than the centralized database. Both the genetic algorithm and the dynamic exhaustive planning algorithm were taken in the query simulation for the performance comparison. The result shows that the genetic query optimization method in this paper has better performance in the distributed database query application. The case study and the simulation result show that the algorithm can get a satisfactory optimization result in a few iterations and the query optimization algorithm based on the genetic method has nice performance of the query optimization property, and the consumption and costs of the query is reduced to the minimum. The method which this paper proposed has good application performance and is valuable to put into practice. © (2013) Trans Tech Publications, Switzerland.


Tang Y.,Chengdu University of Technology | Zhang F.,Henan economics and Trade Vocational College | Guo Y.,Chengdu University of Technology
Chinese Journal of Sensors and Actuators | Year: 2010

Aiming at mobile robots, the ultrasonic distance-measuring sensor is researched based on microcomputer AT89C51 as control system, and achieve the development of hardware/software. The system formation, experiment result and system error is analyzed. The system can measure certain distance on the premise that the speed of reflected wave in the air. Results show that the design is able to improve obstacle avoidance capabilities and the precision and reliability at mobile robot navigation.


Zhang C.-T.,Henan economics and Trade Vocational College | Zhao A.-X.,Xi'an University of Science and Technology
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2013

The BP network uses the rule of local decline to slow convergence speed and easy to fall into local optimum. With the increase of BP input parameters lead to the dimension disaster. Taking into consideration the above problems, Using adaptive ant colony optimization algorithm optimized the training process of BP network referred to as AACOABP. The BP network and the BP network optimized by adaptive ant colony algorithm to (AACOABP) were used to identify the faulty type of the collecting samples about DGA fault test data, AACOABP can make the fault identification accuracy is greatly increased, the recognition accuracy from 50% ∼ 75% to 87.5% ∼ 100%. © 2013 IEEE.


Yang D.,North China University of Water Conservancy and Electric Power | Li X.,Henan economics and Trade Vocational College | Liu Y.,Henan Normal University
Journal of Cluster Science | Year: 2013

The time-dependent density functional theory (TDDFT) method has been carried out to study the influences of hydrogen bonding and solvent polarity on the spectral properties of 4-aminophthalimide (4AP) clusters formed with hydrogen-accepting solvents triethylamine (TEA) and dimethyl sulfoxide (DMSO). The ground- and S1-state geometry structure optimizations, hydrogen bond energies, absorption and emission spectra for both the 4AP monomer and its two triply hydrogen-bonded clusters 4AP + (TEA)3 and 4AP + (DMSO)3 have been calculated using DFT and TDDFT methods respectively with the hybrid exchange correlation functional PBE1PBE and split-valence basis set 6-311++G(d,p). It has been demonstrated that the two hydrogen bonds I and II formed with the amine group of 4AP are significantly strengthened while the hydrogen bond III formed with the imide group is slightly weakened due to the intramolecular charge transfer from the amine group to the two carbonyl groups of the 4AP molecule upon photoexcitation. In addition, the hydrogen bonds formed by 4AP with DMSO are stronger than those formed with TEA, which together with its strong polarity, should be the main reasons for the more redshifts of both the absorption and the fluorescence spectra of 4AP in solvent DMSO than those in TEA. © 2013 Springer Science+Business Media New York.


Zhang C.-T.,Henan economics and Trade Vocational College | Zhang Y.-B.,Henan economics and Trade Vocational College
Applied Mechanics and Materials | Year: 2013

For detecting the network intrusion signal in deep camouflage precisely and effectively, a new detection method based chaotic synchronization is proposed in this paper. The Gaussian mixture model of the network data combined with expectation maximization algorithm is established firstly for the afterwards detection, the chaotic synchronization concept is proposed to detect the intrusion signals. According to the simulation result, the new method which this paper proposed shows good performance of detection the intrusion signals. The detection ROC is plotted for the chaotic synchronization detection method and traditional ARMA method, and it shows that the detection performance of the chaotic synchronization algorithm is much better than the traditional ARMA detection method. It shows good application prospect of the new method in the network intrusion signal detection. © (2013) Trans Tech Publications, Switzerland.


Hu X.-P.,Henan economics and Trade Vocational College
Applied Mechanics and Materials | Year: 2013

An improved data clustering algorithm was proposed based on the Fuzzy C-Means (FCM) algorithm for the purpose of clustering the data precisely and effectively, through progressing the performance of the data clustering to afford the element work for the application of fault diagnosis and target recognition and so on. There was fatal weakness for the traditional FCM algorithm that the algorithm is sensitive to initial value and noise. The chaotic differential evolution FCM algorithm was proposed according to the efficient global search capability of differential evolution algorithm and the traversal characteristic of chaotic time series. The improved algorithm used the Logistics chaotic mapping to search for the optimal solution, and the chaos disturbance was introduced into the evolutionary population to make up for the defects of FCM algorithm. The new method can overcome the problems of initial value sensitiveness with FCM and local convergence with genetic algorithm. Because the new method. Three types of typical vibration data of faults engines was taken as the example for the research and application. The simulation and application result shows that the data clustering performance of the improved FCM algorithm is much better than the traditional FCM algorithm, and the accuracy rates of fault diagnosis in the application was increased by more than twenty percent, it shows good application prospect. © (2013) Trans Tech Publications, Switzerland.


Zhang Y.-B.,Henan economics and Trade Vocational College | Li Y.-Q.,Henan economics and Trade Vocational College
Applied Mechanics and Materials | Year: 2013

The protocol of the hybrid server was designed based on the Internet of things for the realization of the intelligent management with the different equipments under the Internet of things. The Internet of things had large number of nodes, and the net topology was easy to change, it also had high requirements for the reliability. According to the properties of these properties, an efficient time-division multiple address protocol that was called E-TDMA protocol was proposed based on the improvement of the time division multiple address protocol. A power management system was designed based on the Internet of things, and the Internet of things was applied in the intelligent power management system, the indexes of the E-TDMA protocol based on the Internet of things such as throughput capacity, network stability were tested with the simulation. Test result shows that the number of the data packets in the buffer cache is much less than the traditional TDMA protocol and the dynamical TDMA protocol. It is because that the E-TDMA can make all the units can send data in the same time through CDMS coding. The result shows that the proposed E-TDMA protocol has efficient performance of accessing to the information channel and stability of network transmission in the application of the power management system. © (2013) Trans Tech Publications, Switzerland.

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