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Network Function Virtualization (NFV) shed new light for the design, deployment, and management of cloud networks. Many network functions such as firewalls, load balancers, and intrusion detection systems can be virtualized by servers. However, network operators often have to sacrifice programmability to achieve high throughput, especially at networks' edge where complex network functions are required...
While the software-defined networking (SDN) paradigm is gaining much popularity, current SDN infrastructure has potential bottlenecks in the control plane, hindering the network's capability of handling on-demand, fine-grained flow level visibility and controllability. Adversaries can exploit these vulnerabilities to launch distributed denial-of-service (DDoS) attacks against the SDN infrastructure...
As environmental models have become more complicated, we need new tools to analyze and validate these models and to facilitate collaboration among field scientists, observation dataset providers, environmental system modelers, and computer scientists. Modular design and function test of environmental models have gained attention recently within the Biological and Environmental Research Program of...
Providing well-satisfactory multi-party video conferencing service is remarkably challenging, which demands not only high bandwidth but also low latency. Current commercial implementations typically use one or multiple multipoint control units (MCUs) as the central points for distributing video bit-streams to all participants in the conferencing session. Such MCU-based solution has limited control...
Multi-functional electronic Inspection Lock with Solar rechargeable characteristic is reader unlocked which use electronic key to contact lock directly. Meanwhile, electronic key makes continuous charging by solar energy and then supply power to electronic lock. Electronic key is superior to the mechanical key because one electronic key can manage dozens, even hundreds of electronic lock. Moreover,...
Knowledge management (KM) is playing an important role in commercial and academic activities, and people are usually armed with effective KM tools for implementation. On one hand, KM tools can facilitate KM activities; however, on the other hand, with the "explosion" of KM tools development, people may feel confused about which to choose or which is more suitable. As a result, KM tools should...
In some oil fields, the consumption of electricity and energy was very high because the beam pumping unit worked sustained, expect in the height period of electricity consumption. It increases the burden on the grid and make machines wearied easily when voltage instability. In this paper, we propose a concept of intermittent pumping to beam pumping unit and build a monitoring system of oil wells based...
An accurate and efficient method to predict the shielding effectiveness (SE) of a rectangular enclosure with rectangular apertures is presented. A more accurate mathematical disposal is suggested for the calculation of slot impedance. And the point is to replace the former approximate expression by rigorous elliptical integration. Finally, the predicted results of the new method are compared with...
Nios II is the soft-core 32 bits RISC processor of the Altera Corporation which can be implied in its FPGA. Users can design their own peripherals accord with Avalon Bus specification in Nios II system. A new design method for plus width module (PWM) peripheral is presented, which is completed by Verilog HDL. Comparing to the common PWM module, this new PWM module use the hardware units (logic elements...
Two methods to solve the current difficult problem which SCILAB accessing database in the SCILAB technology are presented. The first method uses Excel as the intermediary to achieve. The second method uses the features of the interface of SCILAB with C computer language which can access database. Using the second method, SCILAB can access database conveniently in the near future.
Electronic commerce protocols are the basis of security in electronic commerce. Therefore, it is essential to ensure these protocols correctly. However, most current protocol analysis methods can only be used to analyze part of properties required by electronic commerce protocols. Rubin logic is a good method for analyzing security protocols. Considered the properties of electronic commerce protocols,...
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