In this article, we study the 1/2(-) and 3/2(-) heavy and doubly heavy baryon states Sigma(Q)(1/2(-)), Xi'(Q) (1/2(-)), Omega Q(1/2(-)), Xi(QQ)(1/2(-)), Omega(QQ)(1/2(-)), Sigma*(Q)(3/2(-)), Xi*(Q)(3/2(-)), Omega*Q(3/2(-)), Xi*(QQ)(3/2(-)) and Omega*(QQ)(3/2(-)) by subtracting the contributions from the corresponding 1/2(+) and 3/2(+) heavy and doubly heavy baryon states with the QCD sum rules in a systematic way, and make reasonable predictions for their masses.
The main purpose of the present paper is to derive some new criteria for meromorphic multivalent starlike functions. (C) 2011 Elsevier Inc. All rights reserved.
The optimization of parameters injecting into orbits based on the pattern search method is studied aiming at the condition that the calculation deviation of on-board ephemeris is gradually increased with the expansion of reckoning time. The causes of influencing on the calculation results of satellite ephemeris and generating the deviation of ground orbit injection parameters are determined through the analysis of satellite orbit calculation flow; a method for correcting the calculation of ground orbit parameters by utilizing the pattern search method is presented with consideration to the limits to on-board hardware. The method is carried out the simulation verification; which obtains good effects.
in this article, we calculate the B -> a(1) (1260) form-factors V(1)(q(2)), V(2)(q(2)), V(3)(q(2)) and A(q(2)) with the B-meson light-cone QCD sum rules. Those form-factors are basic parameters in studying the exclusive non-leptonic two-body decays B -> AP and semi-leptonic decays B -> Alv(1), B -> A (l) over barl. Our numerical results are consistent with the values from the (light-cone) QCD sum rules. The main uncertainty comes from the parameter omega(0) (or lambda(B)), which determines the shapes of the two-particle and three-particle light-cone distribution amplitudes of the B-meson, it is of great importance to refine this parameter. (C) 2008 Elsevier B.V. All rights reserved.
Zhang, Fu-Wen
He, Hui-Jun
Wang, Zhi-Gang
Lin, Gang
Zhu, Jie
Zhang, Jiang-Song
Zhang, Shao-Ming
Solder paste quality can be improved from microstructure and surface status of the solder powder. In this work, the micro-morphology of solder paste was observed and the particle surface condition was analyzed. Also, the conditions of corrosion and the corrosion products in different organic acid groups (activators) were analyzed. The result shows that the SnO passive film on the solder powder surface reacts with the COO- in the active agent of the solder paste. This reaction led the passivation layer to be peeled off. It also caused the change in solder powders' physical and chemical properties and made the metal boundary to be cold-welded. This is the root cause of solder paste exsiccation and deterioration. The study on the details shows that to obtain high-quality solder paste, one of the key methods is using the solder powder with ideal passivation shell structure and defect-free surface.
For the reason of embedded processors and embedded operating systems; and under the rapid motivation of application demands; cross platform technique has become a key point and developing direction in embedded GIS field; with the main purpose that once the application software has been written; it can run on multiple platforms with little modification or without modification. At present; cross platform technique includes three major aspects: middleware technique; Java Virtual Machine technique and abstract layer technique. Among these three techniques; the realization process of middleware has a close contact with the host operating system platform. Java Language has a good cross platform property relying on Java virtual machine; but code execution efficiency is poor. Abstract layer technique also has a good cross platform property; high code execution efficiency and better expansibility; but the interface definition and relative realization of abstract layer are more complicated. A fine software system architecture structure is important to ensure success for any software system. Obeying the hierarchical and modular design principle of cross platform software methods; after analyzing and comparing the advantages and disadvantages of the three cross platform techniques in details; abstract layer technique is adopted in this paper to design the software system architecture of embedded GIS cross platform; and describes the interior components of software developing platform layer. At present this cross platform architecture has been successfully realized on WinCE and Vxworks platforms; and the performance of operating map is very good.
In order to avoid causing serious aftermath by faults of on-orbit spacecraft , need for timely faults diagnosis and faults prediction to take effective measures to minimize security risks and the impact on the mission. The research of spacecraft on-orbit health management technology is carried out in this paper, the system components of spacecraft on-orbit health management system and a solution to fault diagnosis expert system based on neural network and fault trees analysis are discussed. Aiming at the power subsystem of on-orbit spacecraft , Demonstrate and validate of health management and detection system to verify the feasibility of health management programs is also carried out in this paper, and the purpose to enhance the reliability and increase the life span of on-orbit spacecraft is achieved.
In this paper, we introduce and investigate two new classes of meromorphic multivalent functions. Such results as subordination properties, coefficient inequalities, convolution properties and integral representations are proved. Several sufficient conditions for meromorphic multivalent starlikeness and convexity are also derived. (C) 2009 Elsevier Ltd. All rights reserved.
Mohammed A Abdel-Hafez
Rongheng Lin
Binbin Huang
Rania Mokhtar
Rashid A. Saeed
Raed A. Alsaqour
Youzheng Wang
Lifang Wang
Shuhai Zhang
Yurong Li
Ruijuan Wu
Zhiyuan Chen
Shupeng Zhao
Miao Tian
Shifang Zhang
Yongliang Deng
Qiming Li
Ying Lu
Jingfeng Yuan
Xiyin Liu
Lijun Cao
Jun Lu
Guoqing Wu
Moving from legacy power grid systems to Smart Grid (SG) is becoming a priority of many countries and energy service providers. One of the main enabler of a SG infrastructure is having the proper communication network to support its various functionalities and requirements. This paper introduces a communication framework which can be used to integrate the various data communication entities in a Smart Grid environment going from sensors at the consumer’s premises to the energy service provider command and control center. The paper provides a brief overview and discusses the various communication technologies and protocols which can be utilized for such purpose and shows potential scenarios which can be used. Network reliability; performance and overall security considerations are also discussed within the given context.
Autonomous integrated navigation algorithm based on the GPS navigation system-assisted is studied aiming at the condition that the inertial navigation system error is gradually increased with the expansion of reckoning time. The inertial device mathematical model of random drift and inertial navigation system error equation are established through the analysis of the inertial properties of the system error sources. The filter of the inertial/GPS navigation is designed; which realizes the drift compensation of the inertial device. The valid arithmetic of the integrated navigation system and practicable technical case are proved through simulation. The research provides theoretical principles and practicable references to the realization of the satellite precision navigation.
In this article, we study the pseudoscalar bound state eta (c) 'f (0)(980) (irrespective of the hadro-charmonium and the molecular state) with the QCD sum rules. Considering the SU(3) symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states eta (c) 'sigma(400-1200), eta (b) '''f (0)(980) and eta (b) '''sigma(400-1200), and make reasonable predictions for their masses.
Particle swarm optimization (PSO) is a method for tackling optimization functions. However; it is easily trapped into the local optimization when solving high-dimension functions. To overcome this shortcoming; a modified particle swarm optimization is proposed in this paper. In the proposed method; a crossover step is added to the standard PSO. The crossover is taken between each particle's individual best position. After the crossover; the fitness of the individual best position is compared with that of the two offspring; and the best one is taken as the new individual best position. The crossover can help the particles jump out of the local optimization by sharing the others' information. The experiment on five benchmark functions shows that the modified PSO is more effective to find the global optimal solution than other methods.