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.
With regarding to the unbalanced load and the multimedia service of multimedia QoS requirements in GEO/LEO double layer satellite networks, a GEO/LEO double layer satellite networks multi-service routing algorithm is proposed. Based on satellite network topology dynamic discretization, the algorithm defined link initial weights with delay and residual bandwidth and introduced the concept of key link...
Aiming at the limited resources and the high link error rate of satellite network and the situation of that traditional TCP congestion control algorithm can't distinguish between the congestion losses and the link errors, which leads to the waste of network bandwidth, the TCP-BQC algorithm which is a kind of double models control method is presented. Based on the foundation that the root cause of...
The force controller of series elastic actuator (SEA) is an important issue, because it determines the output performance of SEA (the bandwidth and the resonant peak). However, the existing force controllers of SEA attach little importance to the determinants of the performance. This paper develops four different kinds of force controllers and selects the optimal controller by comparing their capabilities...
In this paper we proposed a novel internal heptaband antenna positioned on top of mobile computer or mobile phone PCB to support LTE and WAN bands including 700/850/900/1800/1900/2100/2600. It is low-profile and has excellent antenna performance in terms of bandwidth, efficiency, SAR and HAC.
Trust in Peer to Peer network has the fuzzy feature, which cannot be represented by most of current distinct mathematic theory based trust models. To solve the problem, an interest domain partition based P2P intuitionistic fuzzy trust model IFTrust is proposed, which uses interest domains to represent the interest biases of different peers, and uses trust factors set as well as trust levels set to...
Based on the adiabatic coupling principle, a new scheme of a broadband circular polarizer formed by twisting a high-birefringence (Hi-Bi) fiber with a slowly varying twist rate is proposed. The conditions of adiabatic coupling for the adiabatic polarizer are identified through analytical derivations for the first time. The key design procedure is then suggested for achieving the required performance...
A chiral fiber grating (CFG) formed by twisting a high-birefringence (Hi-Bi) fiber with a linearly varying twist rate is proposed to realize an all-fiber broadband circular polarizer. For the first time, by coating CFG with a higher index material and using the leakage property of leaky modes, the coupling of the core mode to a leaky mode is introduced to achieve a desired extinction ratio. Further,...
Internet path available bandwidth is an important metric for distributed application performance optimization. However, current network coordinate system causes large errors when being used to predict such performance metric. In this paper, based on theoretical and Internet measurement data analysis result, we show that though not strictly satisfy the constraint, Internet path available bandwidth...
An algorithm is presented for direct acquiring PRN code based on sub-sampling, utilizing the auto correlation characteristic of the long period PRN code in DSSS (direct sequence spread spectrum) system. As decreasing signal-to-noise, the performance of algorithm is analyzed, and it is proved effectively by simulation, under sub-sampling.
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.