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User Identity Authentication Based on the Combination of Mouse and Keyboard Behavior
Haitao Tang,Wang Mantao 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
In order to improve the recognition rate of user identity authentication system, a user identity authentication method based on the combination of mouse and keyboard behavior is proposed. First of all, the characteristics of the two indicators of the mouse and keyboard are extracted, and then realizing the use of support to the rationale for the establishment of an identity authentication device, and finally test through a number of user identification and authentication. The results show that this method can improve the recognition rate of the user identity authentication, which greatly reduces the error rate and rejection rate and the results are obviously superior to the traditional method.
Multiple Constrained Dynamic Path Optimization based on Improved Ant Colony Algorithm
Seng Dewen,Tang Meixia,Wu Hao,Fang Xujian,Xu Haitao 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.6
Vehicle navigation system can effectively alleviate traffic congestion, reduce pollution, and reduce travel cost and other problems. As is known to all, the traditional ones are all just static path planning with problems of not only weak effectiveness but also lack of standard optimal path options. They usually provide only one path which represents the shortest time or shortest distance, and ignore the actual demands of the dirivers. Based on traffic data of the past, the upcoming traffic flows can be estimated. With the help of the improved ant colony algorithm, the dynamic optimal path planning results will meet the need of the travelers according with multiple actual constraints.
High performance phosphorus-modified ZSM-5 zeolite for butene catalytic cracking
Xionghou Gao,Zhicheng Tang,Haitao Zhang,Conghua Liu,Zhongdong Zhang,Gongxuan Lu,Dong Ji 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.3
Phosphorus-modified ZSM-5 zeolites were prepared with a novel method, hydrothermal dispersion. XRD showed that the catalysts prepared by the hydrothermal dispersion had better hydrothermal stability than that by impregnation. At the same time, more pronounced cracking activity and higher yield of ethylene plus propylene were obtained on the phosphorus-modified ZSM-5 catalysts prepared by hydrothermal dispersion. Highest yield of ethylene plus propylene was obtained when the loading of phosphorus was 0.68%. The higher amount of phosphorus fixed on the pores of zeolite, higher hydrothermal stability and appropriate acid amount were the possible reasons for obtaining higher yield of ethylene plus propylene.
Application of new porous binder material in fluid catalytic cracking reaction
Xionghou Gao,Gongxuan Lu,Haitao Zhang,Baojie Wang,Zhicheng Tang 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.2
A novel porous binder was obtained by acid-treated kaolin. This new binder owned abundant mesomacro pore and good hydrothermal stability. The prepared catalyst using new binder had a character of low attrition index and large pore volume. The catalysts were tested in a fixed-fluidized bed unit. Compared with comparison sample, the conversion of new catalyst was increased by 0.73%, heavy oil yield decreased by 1.11%, the total liquid and light oil yield increased by 0.95% and 0.74%, respectively. The perfect pore structure and good hydrothermal stability of new binder were the possible reason of obtaining prominent performance.
A field determination method of D-T neutron source yields based on oxygen prompt gamma rays
Xiongjie Zhang,Bin Tang,Geng Nian,Haitao Wang,Lijiao Zhang,Yan Zhang,Rui Chen,Zhifeng Liu,Jinhui Qu Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7
A field determination method for small D-T neutron source yield based on the oxygen prompt gamma rays was established. A neutron-gamma transport equation of the determination device was developed. Two yield field determination devices with a thickness of 20 mm and 50 mm were made. The count rates of the oxygen prompt gamma rays were calculated using three energy spectra processing approaches, which were the characteristic peak of 6.13 MeV, the overlapping peak of 6.92 MeV and 7.12 MeV, and the total energy area. The R-square of the calibration curve is better than 94% and the maximum error of the yield test is 5.21%, demonstrating that it is feasible to measure the yield of D-T neutron source by oxygen prompt gamma rays. Additionally, the results meet the requirements for field determination of the conventional D-T neutron source yield.
Chengfang Qiao,Xia Gao,Qi Tang,Jianfang Wang,Yulin Gao,Meili Zhang,Zhengqiang Xia,Haitao Han,Chunxin Zhao,Chunsheng Zhou 대한화학회 2020 Bulletin of the Korean Chemical Society Vol.41 No.12
A bifunctional lead(II)-acylhydrazone coordination polymer featuring 3D hydrogen-bonded framework exhibits intense blue luminescence and remarkable inhibitory effect on the fusarium fungi.
Construction of Structured q-ary LDPC Codes over Small Fields Using Sliding-Window Method
Haiqiang Chen,Yunyi Liu,Tuanfa Qin,Haitao Yao,Qiuling Tang 한국통신학회 2014 Journal of communications and networks Vol.16 No.5
In this paper, we consider the construction of cyclicand quasi-cyclic structured q-ary low-density parity-check (LDPC)codes over a designated small field. The construction is performedwith a pre-defined sliding-window, which actually executes the regularmapping from original field to the targeted field under certainparameters. Compared to the original codes, the new constructedcodes can provide better flexibility in choice of code rate, codelength and size of field. The constructed codes over small fields withcode length from tenths to hundreds perform well with q-ary sumproductdecoding algorithm (QSPA) over the additive white Gaussiannoise channel and are comparable to the improved spherepackingbound. These codes may found applications in wirelesssensor networks (WSN), where the delay and energy are extremelyconstrained.
Yong Hu,Fei Liu,Longzhi Zhao,Yanchuan Tang,Haitao Jiao 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.5
Al15Mg45Li39Ca0.5Si0.5 LW-HEAs with a density of 1.45 g/cm3 was designed and fabricated by magnetic suspension furnace. The non-dendritic globular microstructures of Al15Mg45Li39Ca0.5Si0.5LW-HEAs were prepared by isothermal heat treatment,and the effects of isothermal temperatures and holding times on the microstructures of semi-solid Al15Mg45Li39Ca0.5Si0.5LW-HEAs were investigated by optical microscope and scanning electron microscope. The results indicate that the phasesof Al15Mg45Li39Ca0.5Si0.5LW-HEAs consist of HCP phases and intermetallic compounds. With the increase of isothermaltemperature, the average grain size increases and the shape factor increases first and then decreases. With the prolongationof holding time, the average grain size increases first, then decreases and then increases again, and the shape factor alsoincreases first and then decreases. The semi-solid Al15Mg45Li39Ca0.5Si0.5LW-HEAs have a low coarsening coefficient. Compared with the as-cast Al15Mg45Li39Ca0.5Si0.5LW-HEAs, the ultimate strength, plasicity and hardness of smei-solidAl15Mg45Li39Ca0.5Si0.5LW-HEAs are improved by 25.7%, 18.5% and 89.7%, respectively.
ASTROD I, Test of Relativity, Solar-System Measurement and G-Wave Detection
Wei-Tou Ni,Albrecht Rudiger,Etienne Samain,Stephan Schiller,Diana Shaul,Sachie Shiomi,Timothy Sumner,Chien-Jen Tang,Jinhe Tao,Pierre Touboul,Haitao Wang,Andreas Wicht,Ji Wu,Xue-Jun Wu,Yaoheng Xiong,Ch 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.1
ASTROD-I is a mission concept under study to realize the general concept of ASTROD (Astrodynamical Space Test of Relativity using Optical Devices). This mission concept has one spacecraft carrying a payload of a telescope, ve lasers, and a clock together with ground stations (ODSN: Optical Deep Space Network) to test the optical scheme of interferometric and pulse ranging and yet give important scientic results. The scientic goals include a better measurement of the relativistic parameters, a better sensitivity in using optical Doppler tracking method for detecting gravitational waves, and measurement of many solar system parameters more precisely. The weight of this spacecraft is estimated to be about 300-350 kg with a payload of about 100-120 kg. The spacecraft is to be launched with initial period about 290 days and to pass by Venus twice to receive gravity-assistance for achieving shorter periods. With good orbit design, after about 370 days from launch, the spacecraft will arrive at the other side of the Sun for the determination of relativistic parameters.