Digital predistortion is a predominant technique for the linearization of power amplifier. Memory polynomial is often used to describe the PA model with memory effect. In this paper, based on memory polynomial, a ...
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Digital predistortion is a predominant technique for the linearization of power amplifier. Memory polynomial is often used to describe the PA model with memory effect. In this paper, based on memory polynomial, a new PA modeling approach which combines look-up table with characteristic time-delay is proposed. Simulation results show that the DPD based on this proposed PA modeling can decrease computational complexity and increase operation frequency significantly.
AJAX (Asynchronous JavaScript and XML) is becoming more and more popular with the prosperity of web 2.0. However, traditional crawlers fail to retrieve information from AJAX applications because of complex JavaScript ...
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AJAX (Asynchronous JavaScript and XML) is becoming more and more popular with the prosperity of web 2.0. However, traditional crawlers fail to retrieve information from AJAX applications because of complex JavaScript operations. Moreover, a single AJAX application with one URL may have different page states, which violates the rule that one URL corresponds to one unique page. The AJAX application can be modeled as a state transition graph and to crawl AJAX is to traverse the graph without prior knowledge of its structure. In this paper, we have distinguished different AJAX events which are not well defined in previous work and proposed a Graphbased AJAX State Traversal (GAST) algorithm to crawl AJAX with minimal edge visits. If topology of the graph is given, this optimization problem turns into a Directed Rural Postman Problem (DRPP) and the optimal lower bound can be obtained. Experimental results show that the proposed algorithm approaches optimum and exhibits better performance than existing work.
In industry, the following problem is often faced: manager must depend on various factors such as production conditions, market price and profit to select the optimal production plan in many available production p...
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ISBN:
(纸本)9781467306898
In industry, the following problem is often faced: manager must depend on various factors such as production conditions, market price and profit to select the optimal production plan in many available production plan. This is actually a multiple objective decision-making problem. In this paper1, we use fuzzy decision-making method to deal with this problem.
In this paper, based on analysis and research on enterprise-scale Call Center, aiming at the problems of PBX Capacity limitation and unresolved rush hours call crash, this paper proposes a new approach which puts ...
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In this paper, based on analysis and research on enterprise-scale Call Center, aiming at the problems of PBX Capacity limitation and unresolved rush hours call crash, this paper proposes a new approach which puts IVR function in front of the PBX (called Pre-IVR ) to solve the aforementioned problems. It is a feasible approach to enhance the capability of enterprise-scale call center with supporting more intelligent functions, such as pre-queue, callscreening etc. Two different technology, based on traditional IN and modern Soft Switch & SIP AS, being used to implement pre-IVR are also proposed. Section Ⅲ, several typical service scenes are taken as examples, How the enhanced functions are logically integrated to carry out a complicated call flows are described in details.
This paper is concerned with two cases of the normal parameter reduction in soft sets. Changing entries and adding objects in soft sets are analyzed. Then, we introduce the definition of positive and negative chan...
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This paper is concerned with two cases of the normal parameter reduction in soft sets. Changing entries and adding objects in soft sets are analyzed. Then, we introduce the definition of positive and negative changed rates, and these properties are proposed. Furthermore, the theorems about normal parameter reduction are proposed after changing entries and adding objects in soft sets. And examples are provided to understand the above properties and theorems.
As an new pattern single photon detector, quantum-dot based single photon detector have good performance potential. In this paper, we first introduce the mechanism of photo-conductive gain of quantum-dot field eff...
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As an new pattern single photon detector, quantum-dot based single photon detector have good performance potential. In this paper, we first introduce the mechanism of photo-conductive gain of quantum-dot field effect transistor(QDFET), which is more suitable for quantum telecommunications compared to traditional mechanism. Then, QDFET in the form of a quantum point contact is mainly discussed, including its sensitivity and transport characteristics.t this method is feasible and effective.
An X-ray CMOS Image Sensor (CMI-X-IS) based on a current mirroring integration (CMI) readout circuit (ROIC) was developed. The photocurrent was mirrored and magnified in an integration capacitor out of the pixel. ...
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An X-ray CMOS Image Sensor (CMI-X-IS) based on a current mirroring integration (CMI) readout circuit (ROIC) was developed. The photocurrent was mirrored and magnified in an integration capacitor out of the pixel. Its noise was suppressed by correlated double sampling circuit, and the video signal was exported by CMOS shift register and multiplexer and output stages. The quantitative analysis for CMI circuit design was implemented emphatically, and computer simulation of CMI was fulfilled. The 64 pixel-line-array image sensor was fabricated by 2μm CMOS process, and the performance parameters of CMI-X-IS were measured. The measurement results show that CMI-X-IS has the characteristics of acceptable non-uniformity, lower dark noise voltage, larger unit area responsiviry, higher output voltage and wider dynamic range. Applying this CMI-X-IS to an experiment system, the video signal waveform of target with different density and different size is obtained.
In the practical work of the H/Alpha Wishart Maximum Likelihood segmentation, Cloude-Pottier's original boundary scheme would have often been a default setting. In this paper, the implication of boundary adjus...
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In the practical work of the H/Alpha Wishart Maximum Likelihood segmentation, Cloude-Pottier's original boundary scheme would have often been a default setting. In this paper, the implication of boundary adjustment in H/Alpha plane on the unsupervised Wishart ML segmentation for fully polarimetric SAR data is researched. Four boundary adjustment schemes are designed, and the Wishart ML segmentation results are compared with that of the original boundary scheme. The analysis illustrates that boundary setting in H/Alpha plane is an important factor affecting the H/Alpha Wishart ML segmentation performance.
In this paper, the negative binomial process is used to account for the over-dispersion in operational risk data. We estimate operational risk by means of the non-convex and convex risk measure, such as Value at R...
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ISBN:
(纸本)9781467306898
In this paper, the negative binomial process is used to account for the over-dispersion in operational risk data. We estimate operational risk by means of the non-convex and convex risk measure, such as Value at Risk and Expected Shortfall, and provide a simple approximation to operational risk in a single risk cell. Moreover this approach is extended to the niultivariate case, where the dependence structure between different risk cells is modeled by the Frank copula. In the final, we discuss almost all the limit cases when the dependence parameter differs. A practical example is presented to demonstrate the efficiency of approximation results.
To improve information retrieval speed, it is the key of minimizing traffic and every required visit peer on the view of reducing traffic, combining the merit of width first search won't lead to redundant and P...
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To improve information retrieval speed, it is the key of minimizing traffic and every required visit peer on the view of reducing traffic, combining the merit of width first search won't lead to redundant and P2P network's dynamic feature, We advanced adopting width first search in local bound-Broad first minimum spanning tree search. It can reduce redundant search packet in some scope. Meanwhile, It won't occupy much network resource in message exchange because of scope is small. The way have good feature in expansibility and robustness. It can adapt to dynamic change in P2P network.
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