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Small target detection is known to be a challenging problem. Inspired by the structural characteristics and physiological mechanism of eagle-eye, a miniature vision system is designed for small target detection in this paper. First, a hardware platform is established, which consists of a pan-tilt, a short-focus camera and a long-focus camera. Then, based on the visual attention mechanism of eagle-eye, the cameras with different focal lengths are controlled cooperatively to achieve small target detection. Experimental results show that the designed biological eagle-eye vision system can accurately detect small targets, which has a strong adaptive ability., submitted to 2021 Chinese Automation Congress (CAC 2021)

Since present fault prediction method of satellite attitude control system cannot describe and predict the nonlinear system effectively, a new method based on fuzzy-parity equation and grey GM (1, 1) model is presented in this paper. Firstly, fuzzy-parity equation and Kalman filter are utilized to extract the fault feature of satellite actuator. Translation transformation and buffer operator are adopted to process the fault feature so as to establish an equal dimension and new information GM (1, 1) model. Then the development trend of the fault feature is predicted and the confidence level of one-step prediction result is evaluated through the prediction grey-level. Simulations demonstrate that the proposed method can predict fault trend effectively and accurately.

Underwater acoustic communication is one of the key technologies in various important research fields, such as ocean geography, offshore oil industry and defense. However, conventional system design can not achieve desirable results, since the underwater channel suffers a lot from multipath propagation and Doppler Effect. In this paper, we aim to introduce a type of coherent underwater acoustic communication system, which combine the joint synchronization and equalization scheme and the joint iterative equalization and decoding technique to combat the severe underwater environment mentioned above. The platform belongs to the physical layer and can take various high layer applications. The proposed system is tested in computer simulated scenarios and experimental data, both of which demonstrate good performance.

e-farm, as China's agricultural modernization effective way for the construction of new countryside in China has injected new vitality. The relevant policies in national support and guidance, the development of China's electronics farm has made remarkable achievements. However, due to China's electronics farm established not long, theoretical research is not mature, and the lack of practical experience for reference, in the promotion of the process there are many factors constraining their development.

China's electronic agriculture, tremendously promoted by the government, has made great progress, which offers support to speed up modernization of agriculture and brings new vigor to construction of the new countryside in China. Although its development is not long, China's electronic agriculture has made remarkable attainments. There is many a factor constraining the promotion of China's electronic agriculture due to its short duration of existence, immature theoretical research and insufficient reference of practical experience. The author, starting with analyzing bottleneck problems of current electronic agriculture like insufficient funds for development, weak construction of infrastructure, shortage of technical support, scarcity of talents, etc., explores approaches to development of China's electronic agriculture in order to provide theoretical directions for its further development.

The fast development of Internet stimulated the e-commerce to advance remarkably, but along with the evanescence of Internet myth, the e-commerce also entered a regulatory period. Security problems have become the bottleneck baffled the healthy growth of the e-commerce. Through analyzing the threats the e-commerce faced and the prerequisites to make the e-commerce system security, it is very easy to get such a conclusion that the application of encryption technology has a great influence on the e-commerce system security.

Stochastic resonance (SR) is a phenomenon that appeal's in nonlinear systems whereby weak input signals can be amplified and optimized by the assistance of noise. In the field of signal detection, the fundamental question is whether SR could be used to construct better detectors than the Neyman-Pearson (NP) detectors. Many researchers have pointed out that no gain should be expected from using a SR signal preprocessor because of the unwanted nonlinearities along the signal processing chain. We studied the SNR and the symmetry-breaking characteristic of the output probability density function (PDF) at the output of the SR. In order to avoid the nonlinearities between the input and output signal waveforms, we translate the input to zero frequency then through the SR processor. We called this procedure the optimum SR detector (OSRD) for its maximum output SNR and its avoidance from the nonlinearities. Simulations show that by using this kind of detector in some SR systems, the detection performance may be "'better" than the NP detector. An explanation is given and implies that the NP detector is still optimum.