Southwest University for Nationalities

www.swun.edu.cn
Nanlu, China

Southwest University for Nationalities often called Minzu Daxue in English, is a university located in Chengdu, the capital city of Sichuan province. Its student population is largely composed of ethnic minorities, but it has recently opened up to Han Chinese and foreigners as well. Its main campus is located in the southwestern section of the 1st ring road encircling central Chengdu. The university has two other campuses. One is located in Shuangliu county, near the airport; the Taipingyuan campus is outside the second ring road. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Yang S.-T.,Shanghai University | Yang S.-T.,Southwest University for Nationalities | Liu Y.,Shanghai University | Wang Y.-W.,Shanghai University | Cao A.,Shanghai University
Small | Year: 2013

The protein-nanoparticle (NP) interface is a current frontier of multiple disciplines, full of challenges and opportunities. The unique behaviors of nanomaterials (NMs) bring many exciting applications, and also raise safety concerns. Beyond bioapplications, various NMs could also enter human bodies from the environment. When entering human bodies, NPs interact with various biomolecules, especially proteins, forming a protein corona. This protein-NP complex is what the biosystems 'see' and 'respond to'. Therefore, understanding how NPs interact with proteins is crucial for both bioapplications and the biosafety of NMs. In this review, the current understanding of protein-NP interactions is summarized, including the theoretical background, experimental results, and computational progresses. Guidelines for improving bioapplication performance and reducing the potential biosafety hazard of NMs by designing the protein-NP interactions are discussed, along with future directions and challenges in this exciting field. Protein-nanoparticle (NP) interaction is the first step when nanomaterials (NMs) enter the human body, forming a protein corona. Understanding the protein-NP interaction is crucial for both the bioapplications and safety of NMs. The current understanding of these interactions is summarized and guidelines are proposed to improve bioapplication performances and to reduce potential biosafety hazards of NMs by designing the protein-NP interactions. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Zhao X.,Bohai University | Zhao X.,China University of Petroleum - East China | Liu X.,Southwest University for Nationalities | Yin S.,Bohai University | Li H.,Bohai University
Automatica | Year: 2014

In this paper, the problems of stability for switched positive linear systems (SPLSs) under arbitrary switching are investigated in a continuous-time context. The so-called "copositive polynomial Lyapunov function" (CPLF) giving a generalization of copositive types of Lyapunov function is first proposed, which is formulated in a higher order form of the positive states of the underlying systems. It is illustrated in this paper that some classical types of Lyapunov functions can be seen as special cases of the proposed CPLF. Then, new stability conditions are developed by the new Lyapunov function approach. It is also proved that the conservativeness of the obtained criteria can be further reduced as the degree of the Lyapunov function increases. A numerical example is given to demonstrate the effectiveness and less conservativeness of the developed techniques. © 2013 Elsevier Ltd. All rights reserved.


This experiment was conducted to investigate the efficacy of Lactobacillus acidophilus, Bacillus subtilis, and Clostridium butyricum supplementation in broilers. A total of 400 one-day-old mixed sex Ross 308 broilers with an initial average BW of 46 ± 0.5 g were randomly allotted into 4 treatments with 5 replicate pens per treatment and 20 broilers in each pen for 35 d. Dietary treatments were (1) an antibiotic-free diet (CON), (2) CON + 5 mg/kg of avilamycin, (3) CON + 1 × 105 cfu of multistrain probiotics/kg of diet (P1), and (4) CON + 2 × 105 cfu of multistrain probiotics/ kg of diet (P2). Broilers fed the P1 and P2 diets had greater BW gain than broilers fed the CON diet during d 22 to 35 (P = 0.01) and overall (P = 0.02). Feed conversion ratios in P1 and P2 were decreased (P = 0.03) compared with that in CON from d 22 to 35. Ileal digestibility of most essential amino acids, with the exception of His and Phe, were increased (P < 0.05) in P1 and P2 compared with CON. Serum IgA and IgM concentrations in P2 were higher (P < 0.05) than those in CON. The cecal Lactobacillus numbers were increased (P = 0.02), and the counts of Escherichia coli were decreased (P = 0.03) in P1 and P2 compared with CON. Dietary supplementation with multistrain probiotics decreased (P < 0.05) the excreta NH3 content compared with the CON. In conclusion, dietary supplementation with multistrain probiotics improved broiler growth performance, ileal amino acids digestibility, and humoral immunity. Furthermore, the probiotics decreased the cecal numbers of E. coli and decreased the NH3 content of excreta. © 2014 Poultry Science Association Inc.


Liu X.,Southwest University for Nationalities | Dang C.,City University of Hong Kong
IEEE Transactions on Automatic Control | Year: 2011

This technical note addresses the stability problem of delayed positive switched linear systems whose subsystems are all positive. Both discrete-time systems and continuous-time systems are studied. In our analysis, the delays in systems can be unbounded. Under certain conditions, several stability results are established by constructing a sequence of functions that are positive, monotonically decreasing, and convergent to zero as time tends to infinity (additionally continuous for continuous-time systems). It turns out that these functions can serve as an upper bound of the systems' trajectories starting from a particular region. Finally, a numerical example is presented to illustrate the obtained results. © 2011 IEEE.


Liang P.,Southwest University for Nationalities
Journal of Bionanoscience | Year: 2013

Information industry is booming, among which biological information as an important part in life science research is vital. However, due to its specialization, biological information sharing is lagging behind. This paper is to propose a semantic web framework for modeling a biological information knowledge base. The idea is to apply Common Warehouse Meta-model to generate a meta-model for any biological information, and then describe the meta-model by UML diagram. Instead of mapping UML diagram directly to XMI, a directed acyclic graph is extracted from the UML diagram in order to keep the semantics. The notation of the directed acyclic graph is modified with inserted annotation so that a query can be answered by searching an acyclic path in the directed acyclic graph. Eventually, the answer can be interpreted into a standard XML schema so as to be understood by machine, making a sensible statement for users. Copyright © 2013 American Scientific Publishers. All rights reserved.


Ping L.,Southwest University for Nationalities
Proceedings - 2010 International Forum on Information Technology and Applications, IFITA 2010 | Year: 2010

Software maintainability is one important aspect in the evaluation of software evolution of a software product. Due to the complexity of tracking maintenance behaviors, it is difficult to accurately predict the cost and risk of maintenance after delivery of software products. In an attempt to address this issue quantitatively, software maintainability is viewed as an inevitable evolution process driven by maintenance behaviors, given a health index at the time when a software product are delivered. A Hidden Markov Model (HMM) is used to simulate the maintenance behaviors shown as their possible occurrence probabilities. And software metrics is the measurement of the quality of a software product and its measurement results of a product being delivered are combined to form the health index of the product. The health index works as a weight on the process of maintenance behavior over time. When the occurrence probabilities of maintenance behaviors reach certain number which is reckoned as the indication of the deterioration status of a software product, the product can be regarded as being obsolete. Longer the time, better the maintainability would be. © 2010 IEEE.


Wang H.,Southwest University for Nationalities
Communications in Computer and Information Science | Year: 2011

This paper firstly applies DC-CWT filter into SAR image denoising. on the base of studying and analyzing the mathematical model of the DT-CWT, especially for multi-scale, multi-resolution performance. According to the merit of strong directory selection and shift invariance of DC-CWT, it proposes a novel noise reduction algorithm. Firstly, it transforms noise image into logarithmic form, then one operates high-frequency coefficients to reduce noise through selecting the optimal threshold. Finally, it reconstructs image. Which reduces Computational complexity and improves the filtering effect. In contrast with traditional filter methods, the DT-CWT exhibits a good performance. © 2011 Springer-Verlag Berlin Heidelberg.


Xiang W.,Southwest University for Nationalities
Advanced Materials Research | Year: 2013

This paper addresses a new design scheme of location and tracking system which can be used suitably by special crowd. The architecture and working theory of this system is introduced in details. The system uses the ARM microprocessor S3C240 as a control unit to combine with GPS and GSM modules.RFID and GPS technologies are combined to achieve positioning in this design, which can realize location and tracking both inside and outside of the designated area. It has the characteristics of rapidity, real-time, portability, accuracy etc. © (2013) Trans Tech Publications, Switzerland.


Huang Q.-Z.,Southwest University for Nationalities
Zidonghua Xuebao/Acta Automatica Sinica | Year: 2012

This paper addresses the consensus problem of discrete-time high-dimensional linear systems with or without delays. The considered system can be viewed as a multi-agent system consisting of multiple agents, each of which possesses its dynamics distinct from the others and is influenced by the states of all the other agents. This study establishes some necessary and sufficient conditions under which the system solves a consensus problem and explicitly expresses the consensus function if the system has a consensus property. The effectiveness of the obtained results is verified by a numerical example.


Dong W.,Southwest University for Nationalities
Applied Mechanics and Materials | Year: 2014

The last decade has seen a significant popularity of instant messaging and its main usage is for recreational purposes. However, instant messaging can also be utilized in the workplace and by utilizing such tools more efficiency of workplace communication can be achieved. For this purpose, in this paper we conduct research on mobile instant messaging in the workplace. Mobile Internet services based communication is chosen because mobile communication is playing an important role in today's communication system. First, the system architecture of a mobile instant messaging is presented. Some main functionality, such as message exchange and file transmission, are elaborated. Then, based on this architecture, an android-based messaging client and a Linux-based server are developed. Finally, the instant messaging software is tested in a real mobile communication network and test results show that the software works well. As mobile Internet services become increasingly important, the instant messaging tool developed in this paper will be utilized in the workplace as a communication means and will improve work efficiency greatly in the future. © (2014) Trans Tech Publications, Switzerland.

Loading Southwest University for Nationalities collaborators
Loading Southwest University for Nationalities collaborators