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In this paper, the natural supercavitys are studied both experimentally and numerically. A series of supercavitating vehicle water-entry test are carried out at different speeds, where it is found that the minimum pressure in the cavity gradually reduced with the increase of water-entry speed. The cause for the evolution progress of natural supercavitation is difficult to get from the experiment,...
Due to the increasing complexity of the processor architecture and the time-consuming software simulation, efficient design space exploration (DSE) has become a critical challenge in processor design. To address this challenge, recently machine learning techniques have been widely explored for predicting the performance of various configurations through conducting only a small number of simulations...
As the speed gap of the modern processor and the off-chip main memory enlarges, on-chip cache capacity increases to sustain the performance scaling. As a result, the cache power occupies a large portion of the total power budget. STT-MRAM (Spin Transfer Torque Magnetic Memory) is proposed as a promising solution for the low power cache design due to its high integration density and ultra-low leakage...
A low refractive index liquid-core fiber is formed under anti-resonant guidance mechanism with broad transmission band and single modeness. A Raman spectroscopy experiment shows the versatility of this fiber platform for biochemical sensing.
Based on the dynamic model of semi — active air suspension with two degree of freedom quarter-car, a controller is designed using backstepping technology and sliding mode control. In the MATLAB / Simulink environment, the effect of backstepping sliding mode controller on car body acceleration, suspension dynamic travel and tire dynamic load is studied. The backstepping controller of the semi-active...
The future 5G networks need to support different kinds of business and applications, so the cloud radio access networks (C-RAN) which can provide a centralized collaborative resource management gain through small base stations, and seamless handoff also can be achieved through the overlapping deployment of macro base stations and micro base stations has become one of the important directions in 5G...
In this paper, an all-fiber Mach-Zehnder interferometer based on a Kagome-lattice hollow-core photonic crystal fiber is presented. The fiber is fabricated using the stack-and-draw technique, with an improved drawing procedure of pressure controls for optimized structure. The transmission properties of the fiber are studied. An all-fiber MZI, based on a short piece of Kagome fiber, is constructed....
Network function virtualization (NFV) is a powerful emerging technique with widespread applicability. It provides Network Functions (NFs) through software virtualization techniques that decouple software and hardware. Some connected network functions constitute a service function chain (SFC). Therefore, the deployment of SFCs is much agile and simple. However, this leads to more service failure. The...
Software-defined networking (SDN) develops a logically centralized control plane by abstracting the underlying network forwarding devices, which makes the control of network traffic more flexible and more intelligent. In SDN, a switch can only work according to the rule of the flow tables received from its controller. Once the controller breaks down, the switch cannot transmit the incoming data packet...
Software-Defined Networking (SDN) develops a centralized control plane to manage the whole network, but the traditional centralized control plane suffers from the issues of reliability and scalability. Although some methods solves the issues, they do not balance load among controllers. In this paper, we propose a load balancing mechanism based on switches group for multiple controllers. The mechanism...
In this paper, we propose a novel algorithm for intelligent drawing based on context awareness in dynamic geometry system. First, the algorithm collects the context information of geometric graph. Second, during the user is drawing, if the user's current operations and context information meet a matching condition, the algorithm will recommend the next graph to be drawn. With this algorithm, users...
Transcoding of a SHVC video is time-consuming especially with high definition resolutions. In this paper, we propose a distributed SHVC video transcoding system that can speed up the transcoding time of SHVC videos. By equipping distributed computing technologies, the proposed architecture can reduce the transcoding time of SHVC videos without the modifications of existing SHVC encoding algorithms...
A method of blind signal separation based on second order statistic analytic equations is provided for a single hydrophone. This method takes second order statistics equations as restrictive conditions to construct blind separation criterion, then traditional blind separation methods are used to separate source signals through iterative optimization of genetic algorithm. Simulation demonstrates effectiveness...
Based on economic development and resource of Countries of “the Belt and Road”, the paper divides OFDI into two types by clustering analysis which are Resource Acquisition OFDI and Market Acquisition OFDI, and uses the method of Grey Incidence Analysis to conduct an empirical research on location choice determinants of OFDI from China to Major Countries of “B&R”. It shows that market size, political...
NetPad is an online dynamic geometry software system designed for mathematics education. It is a Web-based application which can run on various terminals by browsers developed by HTML5. The system not only includes intelligent drawing, dynamic geometry, geometric transformations, animations, measurements, but also provides an open platform to share works and explore mathematics problems. In the paper,...
Considering the different types of equipment manufacturing industries, consumers' differentiated preferences for Chinese domestic equipment manufacturers and multinational equipment manufacturers, as well as the uncertainty of technological level and dependence on production factor in reality, this paper introduces the interval grey number into the Stackelberg game model, and analyzes the market share...
Both channel and phase noise blind recover are proposed and demonstrated to recover the orthogonal-frequency-division-multiplexing (OFDM) signal without using any training symbols or pilot subcarriers in direct-detection optical OFDM. The proposed receivers can achieve similar performance compared to conventional OFDM receivers.
In Ethernet passive optical network (EPON), the distance between optical network units (ONUs) and optical line terminal (OLTs) is in a large range of changes. Only dividing ONUs into a network according to locations will influence the user's QoS. In view of this situation, this paper puts forward a planning strategy of ONUs clustering. We first consider the economy, network delay and network reliability,...
In ethernet passive optical network (EPON), the distance between optical network units (ONUs) and optical line terminal (OLTs) is in a large range of changes. Only dividing ONUs into a network according to locations will influence the user's QoS. In view of this situation, this paper puts forward a planning strategy of ONUs clustering. We first consider the economy, network delay and network reliability,...
We demonstrated femtosecond laser inscription of fiber Bragg gratings (FBGs) in a twin-core few-mode fiber (TC-FMF) for directional bend sensing. An FBG was selectively inscribed in one core of the TC-FMF by using an 800 nm femtosecond laser through a phase mask. Three resonance peaks at the wavelengths of 1549.05, 1547.65, and 1546.08 nm were observed in the reflection spectrum of the TC-FM FBG,...
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