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Research and Implementation of a Vertical Search Engine in the Financial Domain
Yue Hou-guang,ZhangLing,Meng Fan-jun,Songhong-hao 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.5
The exponential growth of the data on the web makes it difficult for web users to locate and obtain the interesting information. The general web search engines, such as Google, Baidu, reduce the degree of difficulty to some extent. The rise of vertical search engine provides a promising approach to address the big challenge. A Chinese vertical search engine is urgently needed to provide professional financial information retrieval service for related financial institutions and government agencies. Therefore, in this paper we investigate, design and implement a vertical search engine in the financial domain. Based onNutch plug-in mechanism, we provide and implement the details of a vertical search engine in the financial domain, especially in the finance domain focused crawler. Experimental results show that, the finance domain focused crawler based on Nutch plug-in mechanism has good performance and can satisfy practical requirements of medium search application, and the system runs well.
Geng Hou,De-Guang Shang,Lin-Xuan Zuo,Lin-Feng Qu,Ming Xia,Yi-Er Guo,Xiang Yin,Shao-Dong Wu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.1
Fatigue test of a needled C/SiC composite with a notch under tension-tension cyclic loading was completed, and the main fatigue crack propagation curve of the needled composite was obtained by the in situ observation of the fatigue process. By analyzing the influence of the failure number and distribution on the tensile loading subjected by 0° fiber bundles, the relationship between the main fatigue crack propagation and the distribution of 0° fiber bundles in the needled composite was established. By observing the fracture microstructure (especially the distribution of 0° fiber bundles) of the needled composite through scanning electron microscopy, the reasons for the varying fatigue resistance of different notched specimens were also explained. In addition, acoustic emission (AE) was also used to analyze the AE energy characteristics during the fatigue crack propagation process of the needled composite.
Upregulation of STK15 in Esophageal Squamous Cell Carcinomas in a Mongolian Population
Chen, Guang-Lie,Hou, Gai-Ling,Sun, Fei,Jiang, Hong-Li,Xue, Jin-Feng,Li, Xiu-Shen,Xu, En-Hui,Gao, Wei-Shi,Cao, Jian-Ping Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.15
Background: The STK15 gene located on chromosome 20q13.2 encodes a centrosome-associated kinase critical for regulated chromosome segregation and cytokinesis. Recent studies have demonstrated STK15 to be significantly associated with many tumors, with aberrant expression obseved in many human malignancies. The purpose of this study was to investigate expression of STK15 in esophageal squamous cell carcinomas (ESCCs) in a Mongolian population. Methods: Two non-synonymous single nucleotide polymorphisms in the coding region of STK15, rs2273535 (Phe31Ile) and rs1047972 (Val57Ile) were assessed in 380 ESCC patients and 380 healthy controls. We also detected STK15 mRNA expression in 39 esophageal squamous cell carcinomas and corresponding adjacent tissues by real time PCR. Results: rs2273535 showed a significant association with ESCC in our Mongolian population (rs227353, P allele = 0.0447, OR (95%CI) = 1.259 (1.005~1.578)). Real time PCR analysis of ESCC tissues showed that expression of STK15 mRNA in cancer tissues was higher than in normal tissues (p = 0.013). Conclusions: Our study showed that functional SNPs in the STK15 gene are associated with ESCC in a Mongolian population and up-regulation of STK15 mRNAoccurs in ESCC tumors compared adjacent normal tissues. STK15 may thus have an important role in the prognosis of ESCC and be a potential therapeutic target.
Yongjun Hou,Guang Xiong,Pan Fang,Yuwen Wang,Mingjun Du 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.8
The self-synchronizing far-resonant vibrating system of two eccentric rotors is widely used in petroleum, mining and food industries, and its motion stability is affected by material impact. However, the synchronous characteristics and stability of this kind of the system are studied rarely. Based on the background, a simplified mechanical model of the selfsynchronous vibrating system driven by two eccentric rotors considering material impact is proposed. Firstly, the differential equations of motion about the system in non-collision and collision phase are established by using Lagrange equation and the theorem of momentum. Then, the section of Poincare maps and linearization matrix at the fixed point are solved. Finally, the dynamic behavior of material and system is analyzed, and then the change characteristics of the phase difference of the two eccentric rotors are revealed by numerical simulation. It can be concluded that the motion forms of the system and the rules of abrupt change about the phase difference evolve from periodic variation into chaotic state with the mass ratio of material to vibrating body increasing.
Xiao-Guang Zhang,Ke-Qin Wang,Ben-Shuai Hou 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.5
In order to decrease the parameter sensitivity of deadbeat direct torque control (DB-DTC), an improved deadbeat direct torque control method for surface mounted permanent-magnet synchronous motor (SPMSM) drives is proposed. First, the track errors of the stator flux and torque that are caused by model parameter mismatch are analyzed. Then a sliding mode observer is designed, which is able to predict the d-q axis currents of the next control period for one-step delay compensation, and to simultaneously estimate the model parameter disturbance. The estimated disturbance of this observer is used to estimate the stator resistance offline. Then the estimated resistance is required to update the designed sliding-mode observer, which can be used to estimate the inductance and permanent-magnetic flux linkage online. In addition, the flux and torque estimation of the next control period, which is unaffected by the model parameter disturbance, is achieved by using predictive d-q axis currents and estimated parameters. Hence, a low parameter sensitivity DB-DTC method is developed. Simulation and experimental results show the validity of the proposed direct control method.
Ming-Zhe Hou,Ai-Guo Wu,Guang-Ren Duan 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.2
This paper presents a novel stochastic finite-time stability theorem and gives its application in the finitetimeL2 L¥ filter design for nonlinear stochastic systems. Different form the frequently-used stochastic finitetimestability result, the proposed one does not require that all the states have the same fractional order exponent. Based on this result, a sufficient condition is given for nonlinear stochastic systems to possess the finite-time L2 L¥ performance with a prescribed gain. Further, an existence condition of the finite-time L2 L¥ filter with aprescribed disturbance attenuation level is given for nonlinear stochastic systems with external disturbance inputs. The effectiveness of the obtained results is illustrated by an example.
Robust Adaptive Dynamic Surface Control of Uncertain Nonlinear Systems
Ming-Zhe Hou,Guang-Ren Duan 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.1
This paper studies the robust adaptive dynamic surface control of a class of nonlinear systems with unmatched uncertainties. The unmatched uncertainties consist of not only the linearly parameterized terms but also the nonlinearly parameterized terms. The bound of each nonlinearly parameterized uncertainty term is supposed to be expressed by a known nonnegative function multiplied by a constant called bound parameter. According to whether the bound parameters are known or not, two different kinds of robust adaptive dynamic surface control algorithms are proposed. It is proved that in each case all the states of the closed-loop system are kept uniformly ultimately bounded, and the output is driven to track a feasible desired output trajectory with an arbitrarily small error. An example is also employed to indicate the effect of the proposed methods.
Finite-time Control for Discrete-Time Switched Systems with Time Delay
Lin-Lin Hou,Guang-Deng Zong,Yu-Qiang Wu 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.4
The problem of finite-time state feedback control is considered in this paper for a class of discrete-time switched systems with time delay. Firstly, the concepts of finite-time stability and finite-time boundedness are extended to discrete-time switched systems with time delay, respectively. Then, by re-sorting to the average dwell time approach and Lyapunov-Krasovskii functional technology, some new delay-dependent criteria guaranteeing finite-time boundedness and stability are developed. The state feedback controller is also obtained by virtue of a cone complement linearization (CCL) method. Finally, a numerical example is provided to demonstrate the effectiveness of the proposed results.
Binbin Zhang,Guang Yang,Xiaoqiang Fan,Xiutong Wang,Baorong Hou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Improving the mechanical stability and anti-corrosion durability of superhydrophobic material remains agreat challenge that has not been solved. In this paper, we designed and prepared two types of superhydrophobiccoatings using PTFE nanoparticles and waterborne epoxy resin, viz. superhydrophobicPTFE@epoxy single layer coating and superhydrophobic Epoxy + PTFE@epoxy double layer coating. Itwas found that the mechanical stability and interfacial bonding of the superhydrophobic composite coatingswere further improved by introducing an epoxy resin intermediate layer. The superhydrophobicEpoxy + PTFE@epoxy double layer coating maintained excellent non-wetting superhydrophobicity evenafter 150 sandpaper abrasion and 160 tape-peeling cycles. The electrochemical testing results showedthat the Rct and low-frequency modulus values of the superhydrophobic double layer coating improvedby 7–8 orders of magnitude compared with the bare Q235 carbon steel substrate, demonstrating excellentcorrosion resistance. In addition, the coating maintains good corrosion protection after 60 days ofoutdoor atmospheric exposure and 30 days of neutral salt spray acceleration tests, indicating superiorweathering resistance and long-term anti-corrosion properties. The coating also features delayed icing,self-cleaning, anti-fouling, chemical stability, and high substrate applicability, which provides longlastingmultifunctional superhydrophobic materials with comprehensive functions.