Yan’an Beilu, China
Yan’an Beilu, China

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Chen L.,Shaanxi Normal University | Chen L.,Changji College | Cao H.-X.,Shaanxi Normal University | Meng H.-X.,Shaanxi Normal University
Quantum Information Processing | Year: 2015

A generalized duality quantum computer acting on mixed states (GDQC-MS) is established, which is a device consisting of a generalized quantum wave divider, a finite number of generalized quantum operations, and a generalized quantum wave combiner. Some of the interesting properties of a GDQC are explored. For example, it is proved that the divider and the combiner of a GDQC-MS are mutually dual contractions, and when the generalized quantum operations used in a GDQC-MS are contractions, the GDQC-MS is also a contraction. In that case, the loss of an input state passing through a GDQC-MS is measured and the corresponding operator of a GDQC-MS is a generalized quantum operation. © 2015, Springer Science+Business Media New York.


Zhang H.,Jilin University | Zhang H.,Changji College | Zhao X.,Jilin University | Ding X.,Jilin University | And 5 more authors.
Bioresource Technology | Year: 2010

Rice husk is an abundant agricultural byproduct. In the present paper, research on consecutive preparation of d-xylose and superfine silica from rice husk is carried out. The optimum hydrolysis conditions of xylan in rice husk to d-xylose are as follows: the concentration of H2SO4 is 4% (wt.%), the temperature is 130 °C, the ratio of rice husk mass (g) to H2SO4 solution volume (ml) is 1:4 and the time is 2 h. The hydrolysis degree of xylan reaches 96.22% (wt.%). High purity (98.5%, wt.%) d-xylose is obtained from acid hydrolysis solution with the purification yield of 71.63% (wt.%). At the same time, the metal oxides in rice husk are efficiently dissolved by H2SO4. Residuals from H2SO4 pre-treatment are incinerated under 750 °C in stationary air for 15 min. Silica is obtained with the purity of 99.87% (wt.%). The superfine silica powder is obtained after ground and ultrasonic dispersion, with the diameter of 30-200 nm and specific surface 287.86 m2/g. © 2009 Elsevier Ltd. All rights reserved.


Wang J.,Shandong University | Ma S.,Shandong University | Kulan Z.,Changji College
Chinese Control Conference, CCC | Year: 2016

The finite-time H∞ control problem for a class of nonlinear continuous-time descriptor semi-Markov jump systems is discussed in this paper. Firstly, sufficient conditions on singular stochastic finite-time boundness for nonlinear continuous-time descriptor semi-Markov jump systems are established, then the results are extended to singular stochastic H∞ finite-time boundness for such systems. Secondly, based on the bounds of the time-varying transition probability, the finite-time H∞ state feedback controllers are given depended on strict linear matrix inequalities (LMIs), which guarantee the resulting closed-loop systems are singular stochasticH∞ finite-time bounded. Finally, one numerical example is given to demonstrate the effectiveness of the obtained method. © 2016 TCCT.


Zhang B.,Changji College | Guo F.,Changji College | Wang W.,Changji College
Journal of Nanomaterials | Year: 2012

Single-crystalline ZnTe hierarchical nanostructures have been successfully synthesized by a simple thermal evaporation technology. The as-prepared products were characterized with X-ray diffraction (XRD), scanning electron microcopy (SEM), transmission electron microscope (TEM), and photoluminescence spectrum (PL). These results showed that the ZnTe hierarchical nanostructures consisted of nanowires and nanolumps. The room temperature PL spectrum exhibited a pure green luminescence centered at 545nm. The growth mechanism of hierarchical nanostructure was also discussed. © 2012 Baohua Zhang et al.


Kulan Z.,Changji College | Kulan Z.,Shandong University | Wang J.,Shandong University | Ma S.,Shandong University
Chinese Control Conference, CCC | Year: 2015

In this paper, H∞ filtering problem for a class of nonlinear uncertain discrete-time singular Markov jump systems with time-varying delay is discussed. The nonlinear function satisfies a quadratic constraint. First, a sufficient condition is given that the nominal filtering error system is regular, causal, has unique solution in a neighborhood of the equilibrium point, is stochastically stable and satisfies H∞ performance. With this condition, by using a series of matrix inequalities, another sufficient condition is obtained that the nominal filtering error system is regular, causal, has unique solution in a neighborhood of the equilibrium point, is stochastically stable and satisfies H∞ performance. Then, by using linear matrix inequality (LMI), the design method of robust H∞ filter in the form of standard Markov jump system is given, and the filter designed can be of full or of reduced order. Finally, a numerical example is given to verify the effectiveness and correctness of the proposed method. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Sun L.,Shandong University | Sun L.,Changji College | Wu J.-L.,Shandong University
Journal of Combinatorial Optimization | Year: 2015

A k-(p, 1)-total labelling of a graph G is a function f from (Formula presented.) to the color set (Formula presented.) such that (Formula presented.) if (Formula presented.) if (Formula presented.) and (Formula presented.) are two adjacent edges in G and (Formula presented.) if the vertex u is incident with the edge e. The minimum k such that G has a k-(p, 1)-total labelling, denoted by (Formula presented.), is called the (p, 1)-total labelling number of G. In this paper, we prove that, for any planar graph G with maximum degree (Formula presented.) and (Formula presented.). © 2015 Springer Science+Business Media New York


Miao J.,Shandong University | Miao J.,Changji College | Yang X.,Shandong University
Mathematical Problems in Engineering | Year: 2015

We study more general backward stochastic differential equations driven by multidimensional fractional Brownian motions. Introducing the concept of the multidimensional fractional (or quasi-) conditional expectation, we study some of its properties. Using the quasi-conditional expectation and multidimensional fractional Itô formula, we obtain the existence and uniqueness of the solutions to BSDEs driven by multidimensional fractional Brownian motions, where a fixed point principle is employed. Finally, solutions to linear fractional backward stochastic differential equations are investigated. © 2015 Jie Miao and Xu Yang.


Wang J.,Shandong University | Ma S.,Shandong University | Kulan Z.,Changji College
Proceedings of the 28th Chinese Control and Decision Conference, CCDC 2016 | Year: 2016

The robust state feedback H∞ control problem for a class of uncertain nonlinear continuous-time singular semi-Markov jump systems is discussed in this paper. First, based on stochastic Lyapunov functional, a sufficient condition is established, which guarantees the uncertain nonlinear continuous-time singular semi-Markov jump systems are stochastically admissible and satisfy H∞ performance. With this condition, based on the bounds of the time-varying transition probability, an LMI sufficient condition is given such that the singular semi-Markov jump systems are stochastically admissible and satisfy H∞ performance. Then, the state feedback H∞ controller design is developed in the LMI frame. Last, one numerical example is given to demonstrate the effectiveness of the obtained method. © 2016 IEEE.


Guo F.-Q.,Changji College | Zhang B.-H.,Changji College | Wang W.,Changji College | Chen H.-M.,Changji College
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2012

Lead-free K 0.5Na 0.5NbO 3(KNN) piezoelectric ceramics were prepared by conventional solid-state reaction technique and sintered through conventional and hot-pressing sintering process respectively. The effects of sintering method and annealing temperature on the microstructure, morphology and density of KNN ceramics were investigated. The crystallographic structure of KNN ceramic was investigated by X-ray diffraction (XRD) and the fractured microstructures of sintered ceramics were characterized by scanning electronic microscope (SEM). The results show that all specimens exhibit pure perovskite structures. However, compared with the sample prepared with conventional sintering, higher relative density (greater than 98%), smaller grain size (0.6 μm) and lower tanδ (≤2.8%, 1 kHz) are obtained in the KNN ceramics sintered through hot-pressure sintering process, meantime various particle sizes and densities of KNN ceramics can be obtained by selecting suitable annealing temperature.


Zhumahan K.,Shandong University | Zhumahan K.,Changji College | Shuping M.,Shandong University | Chenghui Z.,Shandong University
Chinese Control Conference, CCC | Year: 2014

In this paper, ∞8 filtering problem for a class of nonlinear uncertain discrete-time singular Markov jump systems is discussed. The nonlinear function satisfies a quadratic constraint. First, a linear matrix inequality (LMI) sufficient condition is developed which guarantees that the nominal filtering error system is regular, causal, has unique solution in a neighborhood of the equilibrium point, is stochastically stable and satisfies ∞8 performance. In order to facilitate the design of the filter, with this condition, by using a series of matrix inequalities, another LMI sufficient condition is obtained which guarantees that the nominal filtering error system is regular, causal, has unique solution in a neighborhood of the equilibrium point, is stochastically stable and satisfies ∞8 performance. Then, the design method of robust ∞8 filter in the form of standard Markov jump system is given, and the filter designed can be of full or of reduced order. Finally, a numerical example is given to verify the effectiveness and correctness of the proposed method. © 2014 TCCT, CAA.

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