Research and Design in Unified Coding Architecture for Smart Grids

 Standardized and sharing information platform is the foundation of the Smart Grids. In order to improve the dispatching center information integration of the power grids and achieve efficient data exchange, sharing and interoperability, a unified coding architecture is proposed. The architecture includes coding management layer, coding generation layer, information models layer and application system layer. Hierarchical design makes the whole coding architecture to adapt to different application environments, different interfaces, loosely coupled requirements, which can realize the integration model management function of the power grids. The life cycle and evaluation method of survival of unified coding architecture is proposed. It can ensure the stability and availability of the coding architecture. Finally, the development direction of coding technology of the Smart Grids in future is prospected

Towards a Paradigm for Inter-Organization E-Collaboration: Collaborative Business

As the adoption of information technologies, especially the Internet technologies, there is an increasing interest on inter-organization collaboration in e-business. The ‘collaboration’s in the existing literatures often mean different. These diverse views make it difficult to understand what the collaboration is and to know what have been achieved and what still needs to be done. The paradigm of e-Collaboration has yet to be established. This paper provides a framework for Inter-organization e-Collaboration. The framework identifies the heart of e-Collaboration — joint intellectual efforts, which has seldom been explored by existing studies. Moreover, existing relevant literatures are organized and are analysed using the framework and future research directions are indicated based on the analysis

Large Dimuon Asymmetry In Bs-bar B_s Mixing From Unparticle Indced Gamma^{12}_s

Exchange of unparticle stuff of dimension d_\U with FCNC interaction can induce $M^{12,u}$ and $\Gamma^{12,u}$ causing meson and anti-meson mixing with the relation \Gamma^{12,u}/M^{12,u} = 2 \tan(\pi d_\U). We show that this type of unparticle contribution can provide the much needed large $\Gamma^{12}_s$ to explain the recently observed anomalously large dimuon asymmetry in $B_s -\bar B_s$ system reported by D0 collaboration. The same interaction can also accommodate large mixing induced CP violation in $B_s \to J/\psi \phi$ indicated by CDF and D0 data. Experimental data can provide constraints on the unparticle dimension and scale.Comment: Revised version with several changes including figure

Electric-field control of magnetic ordering in the tetragonal BiFeO3

We propose a way to use electric-field to control the magnetic ordering of the tetragonal BiFeO3. Based on systematic first-principles studies of the epitaxial strain effect on the ferroelectric and magnetic properties of the tetragonal BiFeO3, we find that there exists a transition from C-type to G-type antiferromagnetic (AFM) phase at in-plane constant a ~ 3.905 {\AA} when the ferroelectric polarization is along [001] direction. Such magnetic phase transition can be explained by the competition between the Heisenberg exchange constant J1c and J2c under the influence of biaxial strain. Interestingly, when the in-plane lattice constant enlarges, the preferred ferroelectric polarization tends to be canted and eventually lies in the plane (along [110] direction). It is found that the orientation change of ferroelectric polarization, which can be realized by applying external electric-field, has significant impact on the Heisenberg exchange parameters and therefore the magnetic orderings of tetragonal BiFeO3. For example, at a ~ 3.79 {\AA}, an electric field along [111] direction with magnitude of 2 MV/cm could change the magnetic ordering from C-AFM to G-AFM. As the magnetic ordering affects many physical properties of the magnetic material, e.g. magnetoresistance, we expect such strategy would provide a new avenue to the application of multiferroic materials.Comment: 4 pages, 4 figure

Extracting jet transport parameter q^\hat{q} from a multiphase transport model

Within a multi-phase transport model with string melting scenario, jet transport parameter $\hat{q}$ is calculated in Au+Au collisions at $\sqrt{s_{NN} }$= 200 GeV and Pb+Pb collisions at $\sqrt{s_{NN} }$= 2.76 TeV. The $\hat{q}$ increases with the increasing of jet energy for both partonic phase and hadronic phase. The energy and path length dependences of $\hat{q}$ in full heavy-ion evolution are consistent with the expectations of jet quenching. The correlation between jet transport parameter $\hat{q}$ and dijet transverse momentum asymmetry $A_{J}$ is mainly investigated, which discloses that a larger $\hat{q}$ corresponds to a larger $A_{J}$. It supports a consistent jet energy loss picture from the two viewpoints of single jet and dijet. It is proposed to measure dijet asymmetry distributions with different jet transport parameter ranges as a new potential method to study jet quenching physics in high energy heavy-ion collisions.Comment: 7 pages, 7 figure

5-Chloro-2-hydroxy­benzene-1,3-dicarb­aldehyde

In the crystal structure of the title compound, C8H5ClO3, both formyl groups are in the plane of the chloro­phenyl unit and the mol­ecule is stabilized by intra­molecular O—H⋯O hydrogen bonding. The mol­ecules are connected via inter­molecular O—H⋯O hydrogen bonding into chains and are stacked into columns with a centroid–centroid distance between adjacent aromatic rings of 3.914 (2) Å