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.
Around the above problem, the new power supply is designed. In the design, L6562 is used to control the APFC circuit, and EG8010 is used to control full-bridge inverter circuit. According to the design requirements, firstly, the parameter calculation and the device selection are completed. Then, Saber software is used to simulate the active power factor correction circuit and the inverter circuit...
Audio tampering is often accompanied with resampling especially in audio splicing, re-compression, time-scale and pitch-scale modification etc. We assess the quality of re-sampling audio by two measures, in which Extended Bark Spectral Distortion model(EBSD) is adopted as an objective measure and Mean Opinion Score(MOS) is selected as a subjective measure. Experiments show that EBSD measure has a...
The decision of business application needs is getting more and more attention because it is the only one to bring commercial value directly in five major decisions of IT governance. However, throughout the methods widely used currently for business application needs decision, some only reflect the wishes and ideas of individual managers and the other are so generalized that cannot provide either business...
In this paper, the superstrate-type silicon-based tandem cells between air and glass are added to a porous SiO2/MgF2 double-layer anti-reflective (DLAR) thin film structure in order to improve the glass substrate low reflectivity in a wide spectral range (400–1200nm), without high reflectivity in the near-infrared region. Practical discussion is presented, as well as experimental results of fabricated...
Near infrared reflectance spectroscopy was used to quantify the cordycepic acid and adenosine content in Paecilomyces tenuipes mycelia. Quantification of cordycepic acid and adenosine content was achieved by the conventional method. Models were built using near infrared reflectance for determinating the contents of cordycepic acid and adenosine. Monte Carlo partial least square (MCPLS) and Moving...
The use of near infrared spectroscopy (NIRS) to measure the concentration of elements in Irpex lacteus was investigated. One hundred and seventy five samples were collected and traditional methods were used to determine the concentration of adenosine, polysaccharide and mannitol. The spectra were pre-treated by savitzky-golay smoothing, fast fourier transform (FFT), 1st derivative, 2nd derivative,...
This paper describes the development a novel traveling wave ultrasonic micromotor fabricated directly from low-cost and high-performance bulk piezoceramic PZT. We report a simpler approach to realizing traveling wave ultrasonic micromotors in which traveling waves are generated within a tethered annular stator microfabricated from a single sheet of bulk PZT. Actuation is achieved using interdigitated...
Bulk PZT sheets are patterned using micro powder blasting and a dry film photoresist to fabricate functional piezoelectric actuators. Etch characterization of bulk PZT is reported for improved powder blasting parameters. Using this information, PZT actuators are successfully fabricated and tested. The developed method described offers great potential for future bulk PZT transducers, as it provides...
The capacity region of the Gaussian interference channel with two source-destination pairs where the sources can cooperate is not known. Prabhakaran and Viswanath showed that the sum-rate capacity can be achieved to within 19 bits/s/Hz by using a combination of superposition coding and zero-forcing. This paper only focuses on the symmetric capacity, i.e., the maximum equal rate point that the two...
While there are ever growing focuses on mobile visual search in recent years, a comprehensive benchmark database with rich context information (such as GPS) for fair evaluation among different strategies is still missing. This paper introduces a PKUBench benchmark for the quantitative evaluations of mobile visual search with the support of GPS. It contains 13,179 images organized into 198 distinct...
In this paper, we introduce a novel touristic trip suggestion system to facilitate the traveling of mobile users in a given city. Given the current user location and his touristic destination, our system can suggest a shortest trip path that visits as many popular landmarks as possible. To this end, we collect geographical tagged photos from Flickr [1] and Panoramio [2] photo sharing websites. Then...
To alleviate the growing concern of energy waste in networked devices, we present PCube, a server-centric data center structure that conserves energy by varying bandwidth availability based on traffic demand. PCube not only supports a low-power mode for existing data centers offering full bisection bandwidth without hardware modification or re-wiring, but also provides an alternative for new data...
The removal of nitrate by micro-electrolysis process was studied. According to principles of micro-electrolysis, the reaction column was fed with iron filings and granular activated carbon. By controlling pH value, NO3−-N concentration, HRT, aeration, the influence of these factors were investigated. The results showed that when at the case of 1∼2.5 of pH value, 40mg/L of NO3−-N, 90min of HRT,180∼260...
The core issue of the engineering project bid evaluation is how to adapt equitable and scientific strategic to optimize and select the limited bidding schemes. On the basic of ELECTRE-I and ELECTRE-II, this essay introduced concepts such as threshold and valued outranking relations, constructed optimization model of the project evaluation on ELECTRE-III, and verify the feasibility and effectiveness...
Two modeling methods were applied to optimize the culture conditions for nisin production by Lactococcus lactis subsp. lactis in shake flasks, respectively and the results obtained by these methods were compared. The effects of the candidate culture conditions on nisin titer (NTs) were investigated by Plackett-Burman design (PBD) experiments. A linear regression model was established using the data...
Aiming at monitoring information of HCHO, CH4, LPG and other toxic and harmful gas concentrations in the chemical production plant, the monitoring system designed a ZigBee wireless sensor network composed of CC2430, MC114 and MS1100 gas sensor, which built a safe, low power consumption, flexible detection system of toxic and harmful gas concentrations. As the system data transmission with the mode...
In this article using ZigBee technology constructed the wireless sensor network (WSN) pressure monitoring system based on the CC2430 and NPI-15C-353AH pressure sensor, it also designed the wireless communication module and the data acquisition module of WSN nodes, as a result, it achieved a monitoring purpose which had low cost, low power consumption, high reliability and made system configuration...
Since the inception of the load-balanced switch, its elegant scheduling with 100% throughput has attracted a substantial amount of research interest. In this paper, we further investigate the energy consumption issues in the load-balanced switch based on the rate region analysis. We propose a self-adapting sleeping algorithm, not only providing throughput guarantee, but also taking advantages of period...
The use of network coding has been shown to improve throughput in input-queued multicast switches, but not without costs of computational complexity and delays. In this paper, we investigate the design of efficient online network coding algorithms in a switch with multicast traffic. We present Haste, an online opportunistic coding algorithm designed to streamline the computation when network coding...
Distributed storage systems provide large-scale reliable data storage by storing a certain degree of redundancy in a decentralized fashion on a group of storage nodes. To recover from data losses due to the instability of these nodes, whenever a node leaves the system, additional redundancy should be regenerated to compensate such losses. In this context, the general objective is to minimize the volume...
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.