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With the rapid development of science and technology, the informatization level of China water resource management has made considerable improved. Three disasters controls (flood control, anti-drought & typhoon defending) is an important content of the Guangzhou water management work. In recent years, a series of information collection system have been built to make the water status data acquirement...
Based on the requirement of IPD RF SIP application, the silicon based inductor and capacitor and rules have been studied at first. Meanwhile, a two-order silicon-based 2.4GHz bandpass filter with the size of 1.8mm*1.8mm was obtained by the combination of inductances and capacitors. The insertion loss at 2.4GHz is −1.35dB. Furthermore, to improve the selective of the bandpass filter, one transmission...
Network attack prevention is a critical research area of information security. Network attacks would become choked if attribution techniques are capable of tracing back to the attacker after the hacking event. Therefore, attributing these attacks to a person or organization turns into one of the important tasks when analysts attempt to profile the attacker behind attack traces. To facilitate this...
Due to the demands of the market, high density and low profile packaging options of small packaging are continuously developed. As high density packaging technologies such as Molded Underfill (MUF) on flip chip package are usually used due to its simplification of assembly process steps and the saving of the cost. For MUF process, in order to ensure void free package, it is often constructed a vacuum...
In the aspect of weak signal detection, the single sensor has the limitation to detect the weak signal and carry out the cross correlation operation. Therefore, the paper proposes a multi-sensor cross-correlation fusion algorithm. The same measured point is detected using a plurality of identical sensors and the detected signal is processed using the cross-correlation fusion algorithm. Through theoretical...
In this paper, the optical transmission equation of fiber considering fourth-order dispersion and quintic nonlinearity is proposed. Simulation software of ultra-long haul transmission is developed by discretizing the equation with symmetric spilt-step Fourier method. Unrepeatered optical transmission system of 40Gb/s signal centred at 1550nm is designed. The results of numerical analysis show that...
In order to ensure the collected images can be matched exactly when UUV operates autonomously underwater. An improved Harris-FAST algorithm is proposed in this paper. The algorithm takes full advantages of FAST algorithm and Harris algorithm, which makes the threshold value with self-adaptive and the detected corner in multi-scale and omnibearingly. It can overcome the corner information loss and...
Due to the constant temperature oven, the OCXO can have a higher frequency stability in both long-term and short-term comparing to other crystal oscillators. However, most of OCXOs are using passive temperature control components, such as heating resistors or power transistors, which makes OCXOs have long warm-up time and ease to be affected by the ambient temperature fluctuation. In this paper, demonstration...
We report a novel silicon MZI switch activated by the phase change of a sub-micrometer-size Ge2Sb2Te5 (GST) thin film. The phase change of GST is triggered by electrical pulses, leading to two “self-holding” switching states. Extinction ratio change of 5-dB is measured from the MZI spectrum.
Several recent works interpret convolutional features produced by deep convolutional neural networks as local descriptors. Existing high-dimensional aggregation based methods, e.g., Fisher Vector (FV) obtain inferior performance to pooling based methods in most situations, and we observe that it is mainly caused by the ignorance of spatial weights. In this paper, we propose a novel method named spatial...
A Cubature Kalman Filter with noise estimator is proposed to solve the problem that the selection of the statistic property parameter is not reasonable, which leads to filtering algorithm declining in accuracy and even diverging, when the noise statistic property is unknown in the bearing only target tracking of Unmanned Underwater Vehicle. This algorithm can estimate the noise statistic property...
Phase-shifted fiber Bragg grating (PS-FBG) inscription in nonphotosensitive single mode fiber (SMF) by the fusion splicing technique and femtosecond laser is reported. Two SMFs are fusion spliced to introduce a refractive index modulation point which acts as a phase shift, then exposing the fusion spliced fiber with femtosecond laser and a uniform phase mask. Two dips can be observed in the transmission...
Existing approach to model sensor movement data as pairwise connections in networks implicitly assumes the Markov property and loses higher-order movement patterns. While the higher-order network (HON) captures higher-order movement patterns, there has not yet been a visualization tool tailored for HON. Based on our prior work, in this demo we present HoNVis, a comprehensive visualization and interactive...
As an important part of ICT in education, teacher's ICT application ability in teaching and research is vital to improve teachers' professional development and to promote the education modernization. Understanding the development of teacher's ICT application ability in foreign countries and analyzing the difference between teacher's application ability in urban and rural are an important reference...
ICT in education is a significant strategic to promote the development and innovation of education. Most research studies focus on the establishment of the evaluation indicator system, but performance evaluation is important to the development of ICT in education. Based on the gray theory and fuzzy algorithm, this study analyzed the evaluation model of ICT in education, designed an evaluation system...
With the development of the cloud classroom and its learning environment, improving students' attitudes using the cloud classroom is very significant. This study invests the attitudes towards the cloud classroom with 281 students in high school via a questionnaire survey. We use the structural equation model to test the relationship between students' attitudes and learning resources, perceived responsiveness...
With the rapid development of Internet and information technology, information literacy has become an essential skill in the information society. China pays great attention to the development of information literacy of primary and secondary students. Nowadays, many countries have developed authoritative assessment scale, however, most of them only use it as a testing tool but fail to have real effects...
Cloud computing is a hot topic in the field of computer application, and it provides open services based on the carrier of the service model. Software service is one of the important services of cloud computing, and it is a great test to face changing business requirements for the cloud software service' ability of commonality. At present, the cloud software is difficult to ensure the flexibility...
The researches on the disaster prevention and mitigation play significant role in the medium and small but economically-developed basins lied in the southeast coast of China for its frequent occurrence of flood disasters. As a case study on Dawang flood control protection region in Guangdong Province, the dynamic one-dimensional and two-dimensional coupling hydrodynamic model was taken to construct...
Due to global climate change, frequency of devastating floods tends to be higher and the loss of human lives and property increasing obviously. Development of intelligent flood risk analysis is a trend for flood disaster research. By using one and two-dimensional dynamic coupling hydrodynamic model, to establish a flood control protection region flood routing computation model. The model can calculate...
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