The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To satisfy the need of electrolyte tests of Automatic Biochemical Analyzer, a flow injection dynamic ion analysis method was proposed based on method and experiments, this new method combined the advantages of Flow Injection Analysis (FIA) and Ion Selective Electrode (ISE). With embedded technology, we developed a new electrolyte module and the clinical trials show that the electrolyte module meets...
Distributed storage systems introduce redundancy to provide high data reliability, a simple strategy is replication, but it has a drawback of low storage efficiency, another popular strategy is using erasure code, but the repair cost and complexity are very high. So we introduce the Cyclic Repetition Erasure Code (CREC) which combines the advantage of both replication and erasure code, we use maximum...
With intensive and broad R&D efforts of more than two decades, rare earth (RE) based second generation (2G) high temperature superconducting (HTS) wire has now become an emerging material commercially available to a wide range of scientific, industrial and medical applications including high-field magnets, fault current limiters (FCL), motors & generators, transformers, and power cables. High...
A broadband curvilinear dipole is presented, and impedancematching network including Non-Foster elements is employed to broaden its bandwidth. The antenna is precisely designed in a curved shape with the dimension of 1100 mm × 85 mm. The bandwidth for VSWR less than 2 ranges from 290MHz to 765MHz. Then, a conventional LC matching network is designed for the antenna, which brings a bandwidth of 5 octaves...
With the development of electronic and information technology, the signal generator has been widely used in various fields of electronic technology. And the requirement of its performance is increasingly more and more superior, such as adjustable frequency and range, high frequency stability, fast conversion speed, etc. Meanwhile, Some uncommonly special waveforms are needed in some special environment,...
In this paper, a silicon matrix detector is described and the results of the cosmic ray test are given. The silicon matrix is composed by the 180 silicon PIN detectors, which covers an area of 32 * 20cm2. The data of whole detectors is read out by the ASIC chips, and suppressed by an FPGA. In the test system, the trigger is given by two plastic scintillators, which are placed above and beneath the...
To analyze postoperative risk factors in deep venous thrombosis of lower extremities. Methods: A retrospective analysis was made on the postoperative data of 834 patients who received Color Doppler Flow Imaging (CDFI) for their veins of lower extremities at a 3 first-class ternary hospital from Oct., 2011 to Jun., 2013, then the χ test and multivariate Logistic regression analysis were performed on...
A parameter estimation algorithm of linear frequency modulation (LFM) signal with high precision is presented here. It is firstly based on FFT and CAPON method for estimating the frequency, and then the frequency rate is estimated by using Dechirp which only searches in the frequency rate plane by DFT at the frequency estimate value. The algorithm consists of a coarse search and a fine search to reduce...
Energy efficiency of cloud data centers received significant attention recently as data centers often consume significant resources in operation. Most of the existing energy-saving algorithms focus on resource consolidation for energy efficiency. This paper proposes a simulation-driven methodology with the accurate energy model to verify its performance, and introduces a new resource scheduling algorithm...
With the continuous miniaturization of solder joints, the formation of large Ag3Sn plates in Ag containing solders has a detrimental effect on the reliability of solder joints. In the present work, synchrotron radiation real-time in situ imaging technology was used to study the dissolution and precipitation behavior of Ag3Sn plates, as well as the undercooling of Ag3Sn plates and the solder balls,...
Cooperative spectrum sensing's false alarm probability and detection probability can be affected seriously when certain SUs with poor detection performance or some malicious SUs exist. To solve this problem, an iterative screening strategy based on detection performance (ISDP) strategy is proposed for multi-channel cooperative spectrum sensing in distributed CR networks. We divide time into fixed-length...
Malicious websites provide a platform supporting diverse Internet crimes. They do not only steal the sensitive information but also let the hacker to control the computer of users. Malicious website detection with the machine learning technique achieves satisfying result. However, the characteristics of the malicious website may be modified to evade the detection. In this paper, the exploratory attack...
Edge extraction is an important topic of image processing, and it is also the basis for subsequent processing. For this reason, this paper proposed a method of color image edge extraction based on Manhattan distance map. Firstly, Manhattan distance map is constructed by adjusting the fuzzy radius and the standard deviation of Gauss nuclear. Edge of the image will be enhanced through the Manhattan...
Identifying the major contributing factors to traffic collisions and their severity will assist highway safety improvement initiatives by improved facility design and educational program to address the needs due to the changes in demographics. The traffic collision data used in this study has been collected over the last 20 years on the rural highways and urban streets from Saskatchewan, Canada. In...
Photovoltaic reverse osmosis desalination has great significance not only in solving fresh water shortage, but also in providing a new way for solar energy utilization, especially in the remote area where electricity is unavailable. As one of the most important components of photovoltaic powered reverse osmosis desalination (PVRO) system, the design and application of inverter directly affect the...
Active disturbance rejection control (ADRC) is proposed for electro-hydraulic servo system of aluminum strip cold rolling mill to satisfy industrial requirements. Based on ADRC, the total disturbance including internal dynamics and external load force uncertainties are estimated and actively compensated in real time. The stability and robustness of the system is analyzed in frequency domain using...
A new inverse decoupling control scheme to the main diagonal decoupling target is introduced for flatness and thickness system with the features of strong coupling, uncertainty and time delays in aluminum tandem rolling process. The flatness and thickness dynamic coupling model is built, and the inverse decoupling theory is used to decouple the MIMO system to weaken the coupling effects, and then...
With the increasing integration of distributed generation, distribution grids are evolving from passive networks to active grids. The existence of DGs and energy storage devices makes the transient simulation of active distribution grids more meaningful compared with that of traditional distribution grids, but at the same time limits the simulation speed and system scale. This paper presents a passivity-guaranteed...
Instead of constructing new nuclear power plant, nuclear power has been shifted to expand the lifetime of nuclear power plant according to the condition of safety and reliability around the world. In order to achieve the goal of life extension, it is important for the nuclear power plants to focus on the life cycle management of critical equipment. LEA (Life Economic Analysis), the core work of life...
The thermal power system become more complex as it develops to the direction of large-scale. This brings high efficiency as well as brings much hidden risk. Once the failure appears, less leads to the decrease of operating load, more leads to catastrophic shutdown, and even damage the unit equipment. Therefore, the research on the real-time temperature on-line monitoring system for thermal power units...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.