A review on the features and technologies for energy efficiency of smart grid

In today's world striving for efficiency in every sector, especially power generation and distribution, smart grids emerge as the solution for efficiently meeting the increasing demand. They adjust themselves to optimally deliver energy at the lowest cost and highest quality possible. The grid successfully makes use of renewable energy resources, electric vehicles, and smart pricing techniques in its attempt to achieve energy efficiency. It also promotes a greener environment by striving to reduce greenhouse gas emissions. Information communication technology (ICT) helps the grid in collecting consumption data from the consumers and in sharing tariff information. ICT also helps to gather information about the status of the grid with regard to aspects like power quality, faults etc. The purpose of this paper is to review recent literature with a view to comprehensively present the technologies employed in the smart grid for achieving energy efficiency and the challenges involved therein.     

Two-mode Gaussian product states in a lossy interferometer

The quantum Fisher information for a two-mode, Gaussian product state in an interferometer subject to photon loss is studied. We obtain the quantum Cramer–Rao bound on the achievable precision in phase estimation using such states. The scaling of the measurement precision with the mean photon number is compared to the shot noise-limited scaling for dual squeezed vacuum states and dual squeezed, displaced vacuum states.     

A Coordinated Framework of DG Allocation and Operating Strategy in Distribution System for Configuration Management under Varying Loading Patterns

Abstract

The distributed generation (DG) planning with the varying pattern of the practical load is difficult as it calls for the frequent changes in DG size and system configuration, which is neither feasible nor permissible. Rather such a DG size and a configuration, which can be utilized over a wider load pattern, are more acceptable. This work presents a coordinated approach for DG planning and system reconfiguration. While to operate a particular DG size and the system configuration over a wide range of loading pattern, the configurations are ranked under different probabilistic loading patterns. Based upon the ranking of the new configuration, the energy performance of the coordinated planning is evaluated. Further, the observations from coordinated planning are imposed on coordinated operation using harmony search algorithm (HSA). The proposed approach is tested for single as well as multi-objectives on a 33-node system. A significant improvement in the computational efforts and energy performance of the resulting configuration have been observed where losses have reduced to 81.11 and 53.77?kW with single DG and multi-DG allocation respectively.     

AN EVALUATION OF THE TRAIL MAKING TEST.

3 GROUPS (21 SS IN EACH) OF HOSPITALIZED WHITE MALES, HOMOGENEOUS AS TO AGE, SEX, AND EDUCATION, WERE EXAMINED WITH THE TRAIL MAKING TEST (TMT). THE GROUPS WERE IDENTIFIED AS BRAIN-DAMAGED, MIXED NEUROPSYCHIATRIC, AND HOSPITALIZED CONTROLS. THE NULL HYPOTHESIS THAT THE TMT SCORES OF THE 3 GROUPS WOULD NOT DIFFER SIGNIFICANTLY COULD NOT BE REJECTED. ALTHOUGH PART A OF THE TMT DIFFERS SIGNIFICANTLY FROM PART B, THE DIFFERENTIAL PSYCHOLOGICAL ATTRIBUTES BEING TAPPED BY BOTH ARE UNKNOWN. IT IS SUGGESTED THAT IF THE TMT IS TO BE APPLIED IN A CLINICAL SETTING, CONSIDERABLY MORE INFORMATION IS NEEDED CONCERNING TEST PERFORMANCE AS A FUNCTION OF AGE. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Two level data encoding approach for reversible data hiding in dual Stego images

Multimedia Tools and Applications - Due to high embedding capacity and security, dual stego-image based data hiding has become so popular. This paper proposes a two-level data encoding approach for...     

Logarithmic Mean Pressure Difference—A New Concept in the Analysis of the Flow Distribution in Parallel Channels of Plate Heat Exchangers

This paper deals with a new concept of logarithmic mean pressure difference (LMPD) to find an accurate mean or true friction coefficient for variable flow in parallel flow channels of the plate heat exchangers while considering the first and the last channel pressure drops. This is analogous to the log mean temperature difference (LMTD) used for the computation of heat transfer in heat exchangers. A method has been suggested to improve the computation of mean or a newly defined “true friction factor” and the mean velocity for considerable flow variations in the channels. A comparative study has been made between the conventional average friction factor and the true mean friction factor for large parallel channels. The results have also been compared between the mean channel pressure drop and LMPD for different sizes of the channels. The analysis shows that the mean channel pressure drop of parallel channels can be predicted accurately by using the so-called true mean friction factor rather than the average friction factor. Using the LMPD method, one can find the last channel pressure drop by knowing the first channel pressure drop of the plate package. Hence, the nature of flow distribution in parallel channels can be predicted easily.     

时尚艺术缔造精美公共卫浴空间

公共卫浴空间已不再是陈设简单、呆板平淡的地方。它早已脱胎换骨，其时尚周到的设计可以为使用者带来舒适感受。