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Using single-shot pump-probe spectroscopy, the carrier relaxation and phonon oscillation in highly photo-excited bismuth are coherently controlled with double-pulse excitation. Beside phonon amplitude and phase, the magnitudes of monotonic decays also oscillate with interpump delay.
Dedicated Short Range Communications (DSRC), a promising vehicle-to-vehicle communication technology, has been under active research and large scale DSRC deployment is expected to start shortly. However, before all vehicles are deployed with DSRC, there will be a relatively long partial DSRC deployment period where DSRC-equipped vehicles and non-DSRC-equipped vehicles both exist on roads. More importantly,...
Inferring fine-grained link metrics by using aggregated path measurements, known as network tomography, is essential for various network operations, such as network monitoring, load balancing, and failure diagnosis. Given a set of interesting links and the changing topologies of a dynamic network, we study the problem of calculating the link metrics of these links by end-to-end cycle-free path measurements...
Qos of broadband network is important. ISPs have some methods for evaluate it. But they are not efficient enough. This paper present a new method in which delay and scale of windows of TCP messages are used for evaluating performance of broadband. Comparison between delay or scale of window s of samples is the core idea of the method. There are two kinds of comparison. One is absolute terms of above-mentioned...
With the wide application of multi-system sharing a common base station antenna, influence of 2nd order and 3rd order passive intermodulation distortions(PIM) of inter-2G/3G/4G communication systems is more serious. The problem of transmission PIM introduced by antenna systems used for transmission and processing of GSM and LTE signals is addressed. The low PIM antenna used for reference measurement...
Aiming to improve positioning precision of the INS/GPS integrated navigation system during GPS outages, a novel neural network learning algorithm based on model predictive filter (MPFNN) for INS errors compensation is proposed. MPFNN is applied to establish a highly accurate mapping relationship when GPS works well and to predict INS errors during GPS outages. Different from traditional algorithm,...
Nonlinear optical responses of transparent materials have been utilized in many applications, such as short-wavelength light generation, optical modulation, and non-destructive study of the sample characteristics. When a laser beam is focused onto a nonlinear crystal, the polarization state of the outcoming beam is dependent on the polarization state of the incident beam together with focused spot...
Different estimators have different optimization criteria according to the concrete application considered. Most existing metrics on estimation performance are some averages of estimation errors, which usually give “big” or “small” results to show the “bad” or “good” performance of the evaluated estimators. However, these metrics are only appropriate for measuring minimum mean-square error (MMSE),...
Relation extraction is very useful for many applications and has attracted much attention. The dominant prior methods for relation extraction were supervised methods which are relation-specific and limited by the availability of annotated training data. In this paper, we propose a method using hierarchical clustering to extract unbounded relations without relying on training data. The relation among...
Most sensor networks employ dynamic routing protocols so that the routing topology can be dynamically optimized with environmental changes. The routing behaviors can be quite complex with increasing network scale and environmental dynamics. Knowledge on the routing path of each packet is certainly a great help in understanding the complex routing behaviors, allowing effective performance diagnosis...
For mobile apps, user-perceived delays are critical for user satisfaction. According to our measurement, long delays are commonly caused by network and storage I/O operations while short delays are mainly caused by UI rendering. Short delays are not uncommon, which account for 55.3% in our measurement cases. Previous app performance studies have largely focused on I/O operations but the understanding...
TinyLink is a holistic system for rapid development of IoT applications. It adopts a top down approach for both hardware and software designs of IoT applications. Taking the application code as input, TinyLink automatically generates the hardware configuration as well as the software binary code executable on the targeted hardware platform. Objective of this demo is to present how the the hardware...
In order to achieve the goal of economic and environmental mutual optimization of micro-grid system operation, a general model of multi-objective dynamic optimal scheduling is established, which takes the independent system simulation module and the operation optimization module as the core. The simulation module uses energy model to evaluate economic and environmental indexes of the system scheduling...
Rapid prototyping of IoT platforms is essential for developers to obtain first-mover advantage, validate feasibility of innovative ideas and the key technologies. In this paper, we present TinyLink, an approach for rapid and cost-effective prototyping of IoT platforms. With TinyLink, developers can specify the key platform functionalities and let TinyLink deal with the details of hardware components...
Generally different websites have different web page structures, which would heavily affect the extraction quality when the web content is automatically collected. On the basis of a statistical analysis on content features and structure characteristics of News domain web pages, this paper proposes a maximum continuous sum of text density (MCSTD) method to efficiently and effectively extract web content...
The determination of how much generating capacity is required in an electric power system is a basic element in power system planning. A second and equally important aspect of the planning process is the development of a suitable transmission system to move the generated energy to the major load points. Adequacy evaluation of composite generation and transmission systems is a complex task that includes...
The distribution system operation in Beijing, China, is investigating on an AC/DC topology for expanding a local distribution system. The feature is to install multi-terminal DC interconnections (MTDI) among three substations, in order to achieve un-interrupted load transfer as well as better loading sharing during primary transformer N-1 outages. This paper presents a reliability assessment of hybrid...
Most existing fuzzy-based load balancing algorithms take into account the loads of multi-class system resources, but they cannot truly fuse various loads because the rule based method they utilize is essentially in a combined way. However, the dynamically changing node loads within the virtual cluster cause difficulties in reasonably partitioning the comprehensive loads consisting of multi-dimensional...
We define Pathomics as the process of high throughput generation, interrogation, and mining of quantitative features from high-resolution histopathology tissue images. Analysis and mining of large volumes of imaging features has great potential to enhance our understanding of tumors. The basic Pathomics workflow consists of several steps: segmentation of tissue images to delineate the boundaries of...
The robust adaptive filtering method based on the State Dependent Riccati Equation technique for SINS/SAR integrated navigation system. This method adopts the state dependent coefficient form to convert nonlinear system model into linear system for avoiding the errors caused by the traditional numerical linearization process. It also adopts the concepts of robust estimation and adaptive factor to...
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