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Search Results: 1 - 10 of 17128 matches for " Baoling Fu "
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Sign-Changing Solutions for Discrete Dirichlet Boundary Value Problem  [PDF]
Yuhua Long, Baoling Zeng
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.511182
Abstract: Using invariant sets of descending flow and variational methods, we establish some sufficient conditions on the existence of sign-changing solutions, positive solutions and negative solutions for second-order nonlinear difference equations with Dirichlet boundary value problem. Some results in the literature are improved.
Parallel Programming Design of BPSK Signal Demodulation Based on CUDA  [PDF]
Yandu Liu, Baoling Zhang, Haixin Zheng
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2016, DOI: 10.4236/ijcns.2016.95011
Abstract:

Realizing digital signal demodulation on the general computer is an important research direction in the field of signal processing in recent years. In this paper, the algorithm of BPSK signal demodulation which has high real-time requirements is researched on the general computer. According to the characteristics of “CPU + GPU” heterogeneous computing, the parallel computation model of digital communication is put forward, and BPSK signal demodulation is realized on CUDA platform. Test results show that the computing time ratio of 1:1.7, when ?the bit error rate can be achieved 10?5.

A Markov Based Performance Analysis of Handover and Load Balancing in HetNets  [PDF]
Baoling Zhang, Weijie Qi, Jie Zhang
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2017, DOI: 10.4236/ijcns.2017.1010013
Abstract: LTE heterogeneous networks (HetNets) is becoming a popular topic since it was first developed in 3GPP Release 10. HetNets has the advantage to assemble various cell networks and enhance users’ Quality of Service (QoS) within the system. However, its development is still constrained by two main issues: 1) Load imbalance caused by different transmission powers for various tiers, and 2) The unbalanced transmission power may also increase unnecessary handover rate. In order to solve the first issue, Cell range expansion (CRE) can be applied in the system, which will benefit lower-tier cell during user association phase; CRE, Hysteresis Margin (HM) and Time-to-Trigger (TTT) will be utilized to bound UE within lower tier network of HetNets and therefore solve the second issue. On the other hand, the relationship of these parameters may be complicated and even reduce QoS if they are chosen incorrectly. This paper will evaluate the advantage and disadvantage of all three parameters and propose a Markov Chain Process (MCP) based method to find optimal HM, CRE and TTT values. And then, the simulation is taken and the optimal combination for our scenario is obtained to be 1 dB, 6 dB and 60 ms respectively. First contribution of this paper is to map the HetNets handover process into MCP and all the phases of handover can be calculated and analysed in probability way, so that further prediction and simulation can be realised. Second contribution is to establish a mathematical method to model the relationship of HM, CRE and TTT in HetNets, therefore the coordination of these three important parameters is achieved to obtain system optimization.
A Feasibility Study of Error Analysis on the Teaching of Chinese-English Translation—A Case Study of Non-English Major Freshmen in BUPT
Yunhong Zhang,Baoling Wang
Journal of Language Teaching and Research , 2011, DOI: 10.4304/jltr.2.1.170-177
Abstract: Error Analysis is one of the most common methods in statistics. According to Corder S. P (1967) error is significant to learners. This paper applies it to the teaching of Chinese-English translation. Taking a whole class as a research unit and by analyzing the common errors made by students in their homework, the researcher records the error types, numbers of each type of error as well as the corresponding frequencies separately. Then the researcher lists out the top six errors and calculates the total frequency of them (total percentage of the six errors occupied in the class). After the analysis, the teacher feedbacks the results to the students as well as explains the methods of error identification and correction. This paper compares two non-English major classes with 60 freshmen; one has adopted “Error Analysis” in the teaching of Chinese-English Translation, while the other has not. Finally after one semester, the class which has applied “Error Analysis” makes greater progress than the class not. From some aspects, the research does show that “Error Analysis Teaching Method” could promote the Chinese-English translating skills of non-English major freshmen. Though this research has its limitations, it is valuable in improving the traditional translation teaching strategies.
Restricted hom-Lie algebras
Baoling Guan,Liangyun Chen
Mathematics , 2015,
Abstract: The paper studies the structure of restricted hom-Lie algebras. More specifically speaking, we first give the equivalent definition of restricted hom-Lie algebras. Second, we obtain some properties of $p$-mappings and restrictable hom-Lie algebras. Finally, the cohomology of restricted hom-Lie algebras is researched.
Derivations from the even parts into the odd parts for Lie superalgebras W and S
Wende Liu,Baoling Liu
Mathematics , 2005,
Abstract: Let $\mathcal{W}$ and $\mathcal{S}$ denote the even parts of the general Witt superalgebra $W$ and the special superalgebra $S$ over a field of characteristic $ p>3,$ respectively. In this note, using the method of reduction on $\mathbb{Z}$-gradations, we determine the derivation space $\mathrm{Der}(\mathcal{W}, W_{\bar{1}})$ from $\mathcal{W}$ into $W_{\bar{1}} $ and the derivation space $\mathrm{Der}(\mathcal{S}, W_{\bar{1}})$ from $\mathcal{S}$ into $W_{\bar{1}}. $ In particular, the derivation space $\mathrm{Der}(\mathcal{S}, S_{\bar{1}})$ is determined.
The structure of restricted Leibniz algebras
Baoling Guan,Liangyun Chen
Mathematics , 2014,
Abstract: The paper studies the structure of restricted Leibniz algebras. More specifically speaking, we first give the equivalent definition of restricted Leibniz algebras, which is by far more tractable than that of a restricted Leibniz algebras in [6]. Second, we obtain some properties of $p$-mappings and restrictable Leibniz algebras, and discuss restricted Leibniz algebras with semisimple elements. Finally, Cartan decomposition and the uniqueness of decomposition for restricted Leibniz algebras are determined.
On the deformations and derivations of $n$-ary multiplicative Hom-Nambu-Lie superalgebras
Baoling Guan,Liangyun Chen
Mathematics , 2014,
Abstract: In this paper, we introduce the relevant concepts of $n$-ary multiplicative Hom-Nambu-Lie superalgebras and construct three classes of $n$-ary multiplicative Hom-Nambu-Lie superalgebras. As a generalization of the notion of derivations for $n$-ary multiplicative Hom-Nambu-Lie algebras, we discuss the derivations of $n$-ary multiplicative Hom-Nambu-Lie superalgebras. In addition, the theory of one parameter formal deformation of $n$-ary multiplicative Hom-Nambu-Lie superalgebras is developed by choosing a suitable cohomology.
Transient Hydraulic Performance and Numerical Simulation of a Centrifugal Pump with an Open Impeller during Shutting Down  [PDF]
Yuliang Zhang, Zuchao Zhu, Yingzi Jin, Baoling Cui
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.24A044
Abstract: In this paper, the transient behavior of a low specific speed centrifugal pump with straight blades during shutting down is studied through the experimental test, theoretical calculation, and numerical simulation. The variations of the rota- tional speed, flow rate, and head with time are obtained in experiment. Based on the experimental results of the rota- tional speed and flow rate, the additional theoretical heads are quantitatively calculated and analyzed. The experimental results of the rotational speed and flow rate are worked as the boundary conditions to accurately accomplish the nu- merical simulation of the transient flow during shutting down. The experimental results show that the decrease history of the flow rate evidently lags behind that of the rotational speed, while the rotational speed slightly lags behind the head. Theoretical analysis shows that there exists a clear negative head impact phenomenon in the process of stopping. The transient behavior of the centrifugal pump with straight blades mainly comes from the rotation deceleration of im- peller, and has nothing to do with the fluid deceleration. The numerical simulations show that a large area backflow can be seen when the rotational speed decreases to zero due to the flowing inertia. In conclusion, the numerical simulation of the flow field is in good agreement with the internal flow theory of centrifugal pumps.
Influence of Additional Device on Performance of the Marine Current Turbine  [PDF]
Baoling Cui, Zhiwei Song, Yuliang Zhang, Yingzi Jin, Yonggang Lin
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.24A037
Abstract: To investigate the influence of additional device on the flow in marine current turbine, two additional devices for ma- rine current turbine including short diffuser and long diffuser types are studied based on the test data of original marine current turbine. The results of numerical simulation show that the additional device with flange structure, compared to marine current turbine without additional device, can obtain more output power. However, it brings the inhomogeneity of additional device force as the increasing of effective output power. At same time, due to existence of the flange, two karman vortices are found behind the flange. The low pressure region produced by additional device and flange struc- ture can speed up the flow around the marine current turbine, so as to improve the output power.
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