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In this paper, a joint synchronization and Doppler scaling factor estimation algorithm has been proposed for underwater acoustic communications. The training sequence, which consists of two Zadoff-Chu (ZC) sequences being conjugate with each other, is utilized to synchronize and estimate Doppler scaling factor, time delay and carrier frequency offsets (CFOs). ZC sequences are well designed to show...
The effect of packaging on the quality of fresh-cut mint was evaluated. The shelf life of the fresh-cut mint was up to 12 d. The 1-MCP and modified atmosphere package treatments showed no significant influence on the total micorflora count, sensory features, and flavor of the fresh-cut mint. Remarkably, the modified atmosphere package treatment held the chlorophyll content and greenness of the mint...
With the development of intelligent lighting technology and green lighting, energy-saving has become an important direction of research and development. A lighting energy consumption monitoring platform has been designed and described in the paper based on Model-View-Controller (MVC) software architecture and Entity framework on .Net platform. The energy consumption of the lighting system before and...
The resource-updating period behavior of mainstream HTTP cache server implementations is suboptimal in that these cache servers send redundant requests to the upstream server if clients request a file that is already being updated from the upstream server. Although this is a corner case issue in previous web applications, its ramifications is significant in live HTTP streaming systems because it will...
It's the trend that sensor network become more standardized and unified as internet of things develops continuously. Aiming at resolving the problems arising from variety of sensors type and interface, this paper presents a design idea of a standardized sensor network node based on virtual instrument and IEEE 1451 standard, and expounds the realization of this sensor node. A concept of sensor node...
An acquisition algorithm based on a novel detector is proposed for weak GNSS signals in this paper. In traditional receivers, the over-threshold detection on amplitude or peak-to-mean ratio is usually employed for signal acquisition. Instead, the proposed novel detector exploits peak positions of successive multiple detections covering a full range of code phase offset to refine the detection performance...
In traditional receivers, frequency locked loop (FLL) or phase locked loop (PLL) is used for carrier tracking. In addition, fast Fourier transform (FFT) is an alternative implementation of carrier tracking when receivers are stationary. This paper presents why those methods are unsuitable for weak signal tracking in practice and proposes an improved algorithm based on dynamic compensation and FFT...
For multi-channel high-speed image data of certain space remote sensing camera, this paper proposed a new image data acquisition and storage system. First of all, the system uses Field-Programmable Gate Array(FPGA) controlling synchronous dynamic random access memory(SDRAM) array to realize the cache of image data, then according to the received commands, sends certain channel's image data to the...
The paper introduces a region model of Internet of things based on urban lighting in which transit nodes are integrated into the lamps to form a wireless network perfectly covering a whole area without any problem of energy heterogeneous. People and objects in the special area can be perceived, identified and localized by RFIDs, and they can also get the information they need. The model has been applied...
For simulation of water grass in valley of Taihu lake, this thesis proposes a modeling method. B-spline curve interpolation is used to generate the midline of leaf's surface, then triangular grids of surface are generated based on midline to make surface smooth. Simultaneously, the edge curve of leaf is generated. By these, the basic features of water grass's leaf, such as curled, soft and floating,...
Blue-green algae, widely distributed almost all over the world, is one kind of the most ancient and primitive algae plants. The toxin and smell that blue-green algae releases out endanger human life and health directly, it is of great significance to study the mechanism of algae outbreak. The paper presents a method for the algae simulation based on wireless sensor networks and particle systems theory...
Two methods are proposed to speed up the Batch RSA decryption. The first method (BMRSA- Batch Multi-Prime RSA) speeds up the Batch RSA decryption by reducing modules in modular exponentiation. Another method (BEARSA- Batch Encrypt Assistant RSA) speeds up the Batch RSA decryption by transferring some decryption computations to encryption. The solutions improve the performance without decreasing security...
This paper aims at speeding up RSA decryption. EAPRSA (Encrypt Assistant Multi-Power RSA) is proposed to improve RSA decryption performance by transferring some decryption computations to encryption. The experimental result shows that the speed of the decryption has been substantially improved and the variant can be efficiently implemented in parallel.
This paper aims at speeding up Batch RSA decryption. BEARSA (Batch Encrypt Assistant RSA) and BEAMRSA (Batch Encrypt Assistant Multi-Prime RSA) are proposed to improve Batch RSA decryption performance. Two variants of Batch RSA speed up decryption by reducing modules in modular exponentiation and shifting some decryption work to encryption. The experimental results and the theoretical values show...
Two variants are proposed to speed up RSA decryption in this paper. BMRSA (Batch Multi-Prime RSA) speeds up RSA decryption by combining the Multi-Prime RSA and Batch RSA. EAMRSA-Encrypt Assistant Multi-Prime RSA) improves RSA decryption performance based on the Multi-Prime RSA and RSA-S2 system. The experimental results show that the speed of the two variants decryption has been substantially improved.
This paper aims at speeding up RSA decryption and signature. The performance of RSA decryption and signature has direct relationship with the efficiency of modular exponentiation implementation. This paper proposes a variant of RSA cryptosystem (EAMRSA-Encrypt Assistant Multi- Prime RSA) by reducing modules and private exponents in modular exponentiation. The experimental result shows that the speed...
To obtain sufficient fault information and extract important fault characteristics are the key to fault diagnosis. For the core of control unit, some important fault characteristics must be obtained from users' on-site environment. However, at present, there are some problems in the design of virtual instrument which is on-site application-oriented. For example, the on-site resources often can not...
TDI CCD is widely used in the high speed imaging camera, glimmering vision and robotic vision fields, because of its excellent operation. But TDI CCD's high ordering price and easy damage in circuit testing usually limit its application in real projects. In this paper basing the simulation of both the photoelectronic character and electronic character, a instrument is described in details.
In this paper, dual direction transmission model is put forward to realize the simulation of environment sensitive virtual plants and the resource competition. Binary tree is introduced to store the expression of L system that make it is easer to get the logical relationship among nodes which close to each other. Experiment result shows that context search in the process of virtual plants growth is...
A target tracking method based on data fusion of infrared and radar is proposed to improve tracking precision. Unscented Kalman filter (UKF) is applied to process data on distributed fusion architectures. The method combines the advantages of UKF and track-to-track algorithms. The cross-covariances of the two sensors are used to estimate overall covariance and states. The overall estimation is obtained...
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