Zeng M.,Chengdu Polytechnic |
Huang X.,Liaocheng Vocational and Technical College
Advanced Materials Research | Year: 2012
The immersive feeling brought by virtual roaming system easily causes the user to got lost in it. In order not to lose direction in a three-dimensional virtual environment, usually a 2D map and the real-time current location of the user are provided so that the user can know his location in the 3D virtual environment action to take for the next step. However, since the parameter transformation is difficult to understand, the technology in virtual system of roaming is limited to use and promotion. This article analyzes the principle of 2D map and suggests the way to realize it based on Virtools. Special explanation is given to how to convert data in the three-dimensional coordinate to the 2D coordinate and the mapping relationship between the direction of the three-dimensional space and the direction of the two-dimensional maps. © (2012) Trans Tech Publications, Switzerland.
Wang D.,Qingdao University |
Ding F.,Jiangnan University |
Chu Y.,Liaocheng Vocational and Technical College
Information Sciences | Year: 2013
This paper concerns parameter identification of Hammerstein output error moving average systems with a two-segment piecewise nonlinearity. By combining the key-term separation principle and the data filtering technique, we transfer the Hammerstein model into two regression identification models, and present a data filtering based recursive least squares method to estimate the parameters of these two identification models. The proposed algorithm achieves a higher computational efficiency than the standard approach by using covariance matrices of smaller dimensions from the two identification models instead of one identification model in the standard approach. © 2012 Elsevier Inc. All rights reserved.
Xu Y.-X.,Northwest Normal University |
Liu Z.-M.,Northwest Normal University |
Liu Z.-M.,Liaocheng Vocational and Technical College |
Lin M.-M.,Northwest Normal University |
And 3 more authors.
Physics of Plasmas | Year: 2011
The collision between two ion-acoustic solitary waves with arbitrary colliding angle in an unmagnetized, ultracold quantum three-component e-p-i plasma has been investigated. By using the extended Poincaré-Lighthill- Kuo (PLK) perturbation method, we obtain the KdV equations and the analytical phase shifts after the collision of two solitary waves in this three-component plasma. The effects of the quantum parameter H, the ratio of Fermi positron temperature to Fermi electron temperature θ, the ratio of Fermi positron number density to Fermi electron number density μ, and the ratio of Fermi ion temperature to Fermi electron temperature ρ on the phase shifts are studied. It is found that these parameters can significantly influence the phase shifts of the solitons. © 2011 American Institute of Physics.
Zhou J.,Yunnan Normal University |
Dong Y.,Liaocheng Vocational and Technical College |
Gao Y.,Yunnan Normal University |
Tang X.,Yunnan Normal University |
And 5 more authors.
Biotechnology and Bioprocess Engineering | Year: 2012
The 774-bp pectate lyase gene plyAI4 from Bacillus sp. I4 was cloned and expressed in E. coli. The gene encodes a 257-residue polypeptide (PlyAI4, 28.3 kDa) with the highest identities of 97.3% with a putative pectate lyase from Bacillus subtilis BSn5 (ADV94306) and 60.3% with an identified pectate lyase of the polysaccharide lyase family (PL) 3 from Paenibacillus amylolyticus 27C64 (ADB78774). The purified recombinant PlyAI4 (rPlyAI4) exhibited apparently optimal activity at pH 10.5 ∼ 11.0 and 50°C. Compared with the majority of reported alkaline pectate lyases, rPlyAI4 exhibited more residual enzyme activity at 20°C (∼45%) or at 70°C (∼50%) and better thermostability at 70°C (∼60 min half-life at 70°C). In the presence of 20% (v/v) ethanol, pectate lyase activity was enhanced by 0.2 fold. After incubation in 40% (v/v) ethanol at 37°C and pH 8.5 for 1 h, the purified rPelAI4 retained more than 75% of the initial activity. Sequence analysis proposed a new signature block, A-D-G-[V/I]-H, for PL 3 pectate lyases. These properties may prove to be important with regards to PlyAI4 for basic research and industrial application. © The Korean Society for Biotechnology and Bioengineering and Springer 2012.
Xu N.,Liaocheng Vocational and Technical College |
Wei M.,State Key Laboratory of Crop Biology |
Wang C.,State Key Laboratory of Crop Biology |
Shi W.,Shandong Agricultural University |
And 2 more authors.
Allelopathy Journal | Year: 2013
The root exudates of Welsh onion (Allium fistulosum L.) were collected with the continuous root exudates trapping system and extracted with organic solvents of different polarities. The allelopathy of different extracted components on cucumber (Cucumis sativus L.) and Fusarium oxysporum f.sp. cucumerinum was studied and the composition was analyzed by using gas chromatography-mass spectrum (GCMS). All components extracted by different organic solvents promoted the growth of cucumber sprouts but inhibited the growth of F. oxysporum f.sp. cucumerinum mycelia. The components extracted by ethyl acetate had strongest allelopathic potential and were similar to those extracted by ether. Following further separation of major components, the allelopathy of components extracted by 80% ethyl acetate and 20% ethyl ether was strongest. The potential allelochemicals of Welsh onion root exudates were: diethyl phthalate, dibutyl phthalate, diisooctyl phthalate, 2-(methylthio)benzothiazole, benzothiazole, benzoic acid p-tolyl ester and cycluron. Dibutyl phthalate, benzoic acid, 4-methylphenyl ester and benzothiazole had significant allelopathic effects on the growth of cucumber sprouts and F. oxysporum f.sp. cucumerinum.
Ming-Cheng D.,Liaocheng Vocational and Technical College |
Xue D.,China University of Petroleum - East China |
Li Z.,Liaocheng Vocational and Technical College
Applied Mechanics and Materials | Year: 2012
Primary technical parameters of centrifugal style speed controller were determined by Routh-Hurwitz criterion; the section gear variator could reach the standard of common gear driving of 9 grade precision indicators through design and calibration, especially suitable for low-rotate speed condition. The mechanical wind machine of constant velocity is novel in mode, briefness in structure, low in making cost and good for spreading and using. © (2012) Trans Tech Publications, Switzerland.
Ding X.,China University of Petroleum - East China |
Yu X.C.,Liaocheng Vocational and Technical College |
Sun H.X.,China University of Petroleum - East China
Advanced Materials Research | Year: 2013
Mesoporous molecular sieve MCM-41 was modified by using 3-mercaptopropyltriethoxysilane as a coupling agent and MCM-41 functionalized with sulfonic acid groups was prepared. The prepared product was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption-desorption technique and temperature programmed desorption. The results showed that during the process of modification the frameworks of the molecular sieve were not destroyed, the channel has ordered property. SH group was successfully grafted to the surface of channels of the molecular sieve. The acid amount on the mesoporous material functionalized with sulfonic acid groups reached 0.755mmol/g, showing a potential application foreground as a catalyst. © (2013) Trans Tech Publications,Switzerland.
Gu Y.,Liaocheng Vocational And Technical College |
Liu Q.,Liaocheng Vocational And Technical College
Journal of Industrial Engineering and Management | Year: 2013
Purpose: Combined the current situation with the development trend of reverse logistics, the article focus on the research of Internet of Things application in the reverse logistics information management, starts with the study of reverse logistics information system, and describes the system structure and system process in applying Internet of Things in reverse logistics information management, finally brings forward the constraints like management and economic ones in applying the technology to the system. Design/methodology/approach: By analyzing the current situation of reverse logistics information system, utilizing literature research methods to put forward characters of reverse logistics information system, and expanding the previous studies on Internet information transmission, we gradually establish the reverse logistics management information system on the basis of the application of Internet of Things. Findings: Through applying the Internet of Things in the reverse logistics system, we can build a complete close-loop logistics system by linking both extreme ends of positive and negative logistics. Besides, the system will be engaged in data mining in backflow prediction data and re- processing data at regular and irregular intervals. Moreover, advice will be provided to design, purchase, manufacturing and customer service departments for their reference so as to promote respective business. Research application and limits: This paper focuses on how the enterprise should apply the Internet of Things technology in reverse logistics, and how to build this system in detail and what the flow planning is made. This thesis is only limited to the analysis of constraints impeding the development of the reverse logistics MIS, including management constraints, economic constraints, hardware technology, data security and rights management constraints. Detailed solutions to address these problems will be put forward in the further research. Originality/value: The value of this article is that building a complete close-loop logistics system by linking both extreme ends of positive and negative logistics. Besides, the system will be engaged in data mining in backflow prediction data and re-processing data at regular and irregular intervals.
Yu X.,Liaocheng Vocational and Technical College
International Journal of Uncertainty, Fuzziness and Knowlege-Based Systems | Year: 2012
Uncertain differential equation with jumps is a type of differential equation driven by two classes of uncertain processes, namely canonical process and renewal process. Based on uncertain differential equation with jumps, this paper proposes a stock model with jumps for uncertain financial markets. Furthermore, the European call and put option pricing formulas for the stock model are formulated and some mathematical properties of them are studied. Finally, some generalized uncertain stock models with jumps are discussed. © 2012 World Scientific Publishing Company.
Xu L.L.,Liaocheng University |
Jia B.X.,Liaocheng University |
Li H.,Liaocheng University |
Liu S.Y.,Liaocheng Vocational and Technical College
Advanced Materials Research | Year: 2014
Along with the network popularization and reform of the government administration, e-government gradually popularized. The populace can comment on government work and the related policy on its website. Because of the richness of Chinese language and dialect, people can use their own dialect.The same opinion may have different statements. The worker have some difficulties when collect and analyze these views. Ontology is a specification of a certain field,to express concept of the particular field and the relationship between them.Ontology can be used for semantic analysis of the various views, to analyze that the people is "agree" or "against", "support" or "not support". Even though different vocabulary, through semantic analysis, can be classified according to their semantic.In the process of analysis, analyse the text comments received throught the data mining,statistics.In addition, also need to construct the relevant language ontology. Language ontology defines many synonyms and near synonyms. Ontology as a reference to sort the comments of the people, analyze the attitude of the people and related laws. © (2014) Trans Tech Publications, Switzerland.