Northwest University for Nationalities
Lanzhou, China

Northwest University for Nationalities is the first minority institution of higher learning founded in China after the establishment of the People's Republic of China, directly under the State Ethnic Affairs Commission of PRC. Its precedent was the third campus of Northwest People's Revolutionary University in Lanzhou. From February 1950, the school was planned on the basis of that campus. In August 1950, Northwest Nationalities College was founded, and a senior CPC leader, Wang Feng, became the first president. In April 2003, approved by Ministry of Education and State Ethnic Affairs Commission, the school adopted the current name, Northwest University for Nationalities.The University is located in Lanzhou, Gansu Province, and covers a land area of 474 acres . It has two campuses: Northwest Xincun and Yuzhong.The University created the first internet website in Tibetan in the world.The following 6 journals are edited and published by the University:Northwest Minorities Research, Journal of Northwest University for Nationalities , Journal of Northwest University for Nationalities Journal of Northwest University for Nationalities Journal of Northwest University for Nationalities Northwest University for Nationalities Tabloid↑ Wikipedia.

Time filter
Source Type

Wang D.,Northwest University for Nationalities
Proceedings of 2016 IEEE 15th International Conference on Cognitive Informatics and Cognitive Computing, ICCI*CC 2016 | Year: 2016

Near Earth missions ranging from low-Earth orbit (LEO) to Earth-Sun Lagrangian points will continue to be a majority of future space missions. A few works have been done with delay/disruption tolerant networking (DTN) technology for LEO-satellite communications and provided feasibility for its adoption in LEO space missions. However, no much work has been done to fully evaluate the performance of DTN in such an environment, especially in the presence of long link disruption, data corruption and loss, and link asymmetry. In this paper, we present an experimental performance evaluation of DTN architecture and protocol stack, with Licklider transmission protocol (LTP) serving as a convergence layer adapter (CLA) underneath bundle protocol (BP), in a typical LEO-satellite communication infrastructure accompanied by a very long link outage, various packet corruption and loss rates, and channel rate symmetry and asymmetry. The experiment was conducted by performing realistic file transfers over a PC-based test-bed. © 2016 IEEE.

Gu F.,Anhui University of Science and Technology | Zhang C.,Chinese University of Hong Kong | Zhang C.,Yale University | Hu A.,Northwest University for Nationalities | And 2 more authors.
NeuroImage | Year: 2013

For nontonal language speakers, speech processing is lateralized to the left hemisphere and musical processing is lateralized to the right hemisphere (i.e., function-dependent brain asymmetry). On the other hand, acoustic temporal processing is lateralized to the left hemisphere and spectral/pitch processing is lateralized to the right hemisphere (i.e., acoustic-dependent brain asymmetry). In this study, we examine whether the hemispheric lateralization of lexical pitch and acoustic pitch processing in tonal language speakers is consistent with the patterns of function- and acoustic-dependent brain asymmetry in nontonal language speakers. Pitch contrast in both speech stimuli (syllable /ji/ in Experiment 1) and nonspeech stimuli (harmonic tone in Experiment 1; pure tone in Experiment 2) was presented to native Cantonese speakers in passive oddball paradigms. We found that the mismatch negativity (MMN) elicited by lexical pitch contrast was lateralized to the left hemisphere, which is consistent with the pattern of function-dependent brain asymmetry (i.e., left hemisphere lateralization for speech processing) in nontonal language speakers. However, the MMN elicited by acoustic pitch contrast was also left hemisphere lateralized (harmonic tone in Experiment 1) or showed a tendency for left hemisphere lateralization (pure tone in Experiment 2), which is inconsistent with the pattern of acoustic-dependent brain asymmetry (i.e., right hemisphere lateralization for acoustic pitch processing) in nontonal language speakers. The consistent pattern of function-dependent brain asymmetry and the inconsistent pattern of acoustic-dependent brain asymmetry between tonal and nontonal language speakers can be explained by the hypothesis that the acoustic-dependent brain asymmetry is the consequence of a carryover effect from function-dependent brain asymmetry. Potential evolutionary implication of this hypothesis is discussed. © 2013 Elsevier Inc.

Yang C.,Northwest University for Nationalities
2017 2nd IEEE International Conference on Cloud Computing and Big Data Analysis, ICCCBDA 2017 | Year: 2017

This paper presents the median surface model and the integral model, and we use them to analyze the practical application of a kind of typical oil tank displacement recognition and tank volume calibration problem. Finally, we obtain the more accurate displacement parameters and accomplish the solution of the two questions. Besides, according to the measured data of annex 2, we can find two functional relations that named equation 14 and equation 15. And by these two equations, we can get a set of approximate solution. © 2017 IEEE.

Wang Y.-B.,Northwest University for Nationalities
Zeitschrift fur Kristallographie - New Crystal Structures | Year: 2017

C22H19BrN2O2, monoclinic, P21/c (no. 14), a = 18.4760(16) Å, b = 4.8400(3) Å, c = 21.6410(18) Å, b = 96.162(1)°, V = 1924.0(3) Å3, Z = 4, Rgt(F) = 0.0542, wRref(F2) = 0.1719, T = 298(2) K. © 2017 Yan-Bin Wang, published by De Gruyter. 2017.

Jiao H.Y.,Northwest University for Nationalities | Wang Y.,Lanzhou University
Physica B: Condensed Matter | Year: 2012

A novel red-emitting phosphor CaSrAl 2SiO 7:Eu 3 was firstly synthesized through the high temperature solid state reaction at 1300°C. The structure, diffuse reflection spectra, photoluminescence spectra, color-coordinate parameters and quantum efficiencies (QE) of phosphors were investigated. The obtained CaSrAl 2SiO 7:Eu 3 phosphors have the same structure with that of the Ca 2Al 2SiO 7 and Sr 2Al 2SiO 7 phosphor, which have the melilite structure. Optical properties were studied as a function of Eu 3 concentration x, when x>0.14, the intensity of absorption of the f-f transitions of Eu 3 at 393 nm is stronger than that of the broad charge transfer transition band (CTB) around 254 nm, and which matches well with the output lights of NUV-LEDs, whereas, the concentration of Eu 3 x≤0.14, the absorption of 393 nm is weaker than that of CTB. The underlying reason of Eu 3 concentration on their luminescent properties was investigated and discussed in detail. As a result, comparing with the commercial red phosphor Y 2O 2S:Eu 3, the CaSrAl 2SiO 7:xEu 3 (x>0.14) phosphor exhibited excellent color purity and much higher brightness and could be considered as promising red phosphors for NUV-LEDs. © 2012 Published by Elsevier B.V. All rights reserved.

Sun W.,Northwest University for Nationalities | Mo Z.,Northwest Normal University
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2013

Highly conductive PPy/graphene nanosheets/rare earth ions (PPy/GNS/RE 3+) composites were prepared via in situ polymerization with p-toluenesulfonic acid as a dopant and FeCl3 as an oxidant. The effects of GNS and RE3+ on the electrical conductivity of the composites were investigated. The results showed that the GNS as a filler had effect on the conductivity of PPy/GNS/RE3+ composites, which played an important role in forming a conducting network in PPy matrix. The microstructures of GNS and PPy/GNS/RE3+ were characterized by the SEM and TEM examinations. It was found that GNS and PPy nanospheres formed a uniform composite with the PPy nanospheres absorbed on the GNS surface and/or filled between the GNS. Such uniform structure together with the observed high conductivities afforded high specific capacitance when used as supercapacitor electrodes. A specific capacitance of as high as 238 F/g at a current density of 1 A/g was achieved over the PPy/GNS/Eu3+ composite. © 2013 Elsevier B.V.

Huang S.,Northwest University for Nationalities
Zeitschrift fur Angewandte Mathematik und Physik | Year: 2016

This paper is concerned with the asymptotic behavior on ∂Ω of boundary blow-up solutions to semilinear elliptic equations (Formula Presentd), where b(x) is a nonnegative function on Ω and may vanish on ∂Ω at a very degenerate rate; f is nonnegative function on [0,∞) and normalized regularly varying or rapidly varying at infinity. The main feature of this paper is to establish a unified and explicit asymptotic formula when the function f is normalized regularly varying or grows faster than any power function at infinity. The effect of the mean curvature of the nearest point on the boundary in the second-order approximation of the boundary blow-up solution is also discussed. Our analysis relies on suitable upper and lower solutions and the Karamata regular variation theory. © 2016, Springer International Publishing.

Chen X.,Northwest University for Nationalities
Advanced Materials Research | Year: 2012

Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology. A common property of many large networks is that the vertex connectivities follow a scale-free power-law distribution. This feature was found to be a consequence of three generic mechanisms: (i) networks expand continuously by the addition of new vertices, (ii) new vertex with different number edges of weighted selected that connected to different vertices in the system, and (iii) new vertices attach preferentially to sites that are already well connected. A model based on these three ingredients reproduces the observed stationary scalefree distributions, which indicates that the development of large networks is governed by robust self-organizing phenomena that go beyond the particulars of the individual systems. © (2012) Trans Tech Publications, Switzerland.

Wang X.L.,Northwest University for Nationalities
Applied Mechanics and Materials | Year: 2013

Effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of MoS2 filled polyimide (PI) composites were studied by using ball-on-disc tribometer, infrared spectra, X-ray photoelectron spectroscopy and scanning electron microscopy. It was found that the irradiation of AO induced the destruction of polymer molecular structures and formation of volatile products which induced the change of the structure, morphology and tribological properties of samples. The addition of MoS2 filler significantly increased the AO resistance of PI composites due to the formation of MoO3-rich skin layers during AO process. The addition of MoS2 improved the tribological properties of PI before and after AO irradiation. © (2013) Trans Tech Publications, Switzerland.

Chen X.P.,Northwest University for Nationalities
Proceedings - 2011 IEEE International Conference on Computer Science and Automation Engineering, CSAE 2011 | Year: 2011

In order to increase the flexibility of control for ADC, a new control method for ADC based on FPGA is proposed in this paper. A state transition diagram can be drawn according to the timing diagram of ADC, Which can be realized in FPGA using Very High-speed Integrated Circuit Hardware Description Language (VHDL). The simulate results show that logic in FPGA is consistent with the requirements. The module based on FPGA can be modified just by modifying software, not the hardware. © 2011 IEEE.

Loading Northwest University for Nationalities collaborators
Loading Northwest University for Nationalities collaborators