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Aiming at the defects of the common communication emitter recognition method, that the targets can't be recognized in the condition of low SNR, a modified communication emitter recognition method based on evidence reasoning theory is proposed. Characteristic selection and database reconstruction is applied to solve the problem of indistinct input, and the D-S algorithm of weighted averaging is applied...
Aiming at the propulsion disturbance problem brought by the discontinuity of the rotation angular acceleration in the freedom flight course of space robot at microgravity condition, a flight trajectory which conforms to cubic curvature polynomials and cubic torsion polynomials in carrier coordinate of robot in 3D space in the trajectory planning stage. The robot's rotation angular velocity, angular...
Owing to the slow circuit board level maintenance and fault location of wireless communications equipment, and technically demanding problems, the multi-state circuit board testing environment was establish to study the circuit board interface type, input and output signals, power supply and others. Based on the diagnostic strategies of multi-signal flow model optimization design, this paper designed...
In this paper, for the purpose of solving the problem of difficult monitoring of multiple-type communication modes networking status in a certain command system, proposed and implemented the online monitoring of communication equipment data transmissions and communication equipment networking status and then displayed dynamically in the master control computer by the way of data collector access and...
This paper studies a class of switched Linear Parameter Varying (LPV) systems in which different control faults are modeled as different system modes according to parameter varying. Two methods are proposed based on the hysteresis method of Multiple Lyapunov function, and H∞ state feedback and output feedback controllers are designed respectively by solving Linear Matrix Inequalities (LMIs). The method...
In this paper, a fast growing cascade neural network (FGCNN) is proposed, as a software sensor, to rapidly estimate the biochemical oxygen demand (BOD) in wastewater treatment plants (WWTPs). Firstly, a novel method, based on the orthogonal least squares (OLS), is put forward to add input and hidden units to the existing network one by one. Every unit added to the network affords the maximal reduction...
Force sensing including collision position, force direction and force size makes robots smoothly interact with environment to strongly adapt to outside world. Skin sensing imitates principle of human skin using special material and physical structure with disadvantages of complex design, low sampling rate, and poor generality and so on. In this paper, the method of using fore/torque sensor to calculate...
This paper introduces an anti-interference robust control strategy for underactuated quadrotor UAV. The strategy consists of an extended state observer and a sliding mode controller. A high gain extended observer was designed to solve the problem of the low measurement accuracy of derivative of the state in real quadrotor UAV system. The oberver can estimate derivative of a given signal with a high...
The diving control of underactuated unmanned underwater vehicle (UUV) is mainly studied according to its manipulating characteristics. A linearized state-space for vertical plane of underactuated UUV is constructed to represent the nonlinear model that describes the dynamics. The controller for diving is designed based on Model Prediction Control with artificial bee colony algorithm in consideration...
Currently the UAV photographic data is unstable, turbulent and inaccurate, and these flaws make image stitching difficult. This paper proposed an innovative fast method based on global subdivision GeoSOT grid frame. And this method can apply to the high-speed image stitching of a certain area at different times on the UAV. The experiment result shows the advantages of the new method over the traditional...
In this paper, a training system integrated by multi elements in information system is developed including the elements of observation, command, control, maintenance and so on by the combination of physical simulation and virtual simulation. Physical simulation carries out a variety of business, operations, maintenance and security, and other trainings, while virtual simulation provides the required...
Nowadays, MOSNS becomes the most popular and hot topic in E-business, it puts social network into E-business value chain, utilizing social capital for marketing. This paper studies the self-network externalities of two groups and the cross-group externalities between users of two groups on MOSNS platform's competitive strategies. The research finds the optimal price which platform charges from customers...
Due to low automation of hot-pressing machine and low precision of parameter control at present, a automatic control system for hot-pressing machine combined upper computer with lower computer is proposed in this paper, a system that Programmable Logic Controller (PLC) acts as its control core and Kingview (Kingview 6.53) acts as its monitoring core. PLC is responsible for controlling equipment and...
Based on high requirements about temperature, PH, level and other factors in methane fermentation of food waste and no complete set of parameters applying to all methane fermentation monitoring system the author designed the automatic control system combined with SIEMENS S7-300PLC and ForceControl V7.0 configuration software. The system can achieve automatic control by the lower machine and achieve...
The models of PV arrays with centralized maximum power point tracking (MPPT) and distributed MPPT structures were set up and output characteristics of PV arrays were simulated under different light intensity. The maximum power output of PV arrays is reduced to 40W from 85W for centralized MPPT structure when simulating solar light intensity of one of PV arrays is adjusted to 800 W/m2 from 1200 W/m...
We are developing teleoperation approach to timedelayed remote driving. This paper presents a complementary technique based on Virtual Reality for teleoperation with the communication delay between the Moon and the Earth. A realistic virtual environment and manual driving system was built with displaying and driving device. Combining the 3D terrain and telemetry, the full scene of rover mission can...
Based on literature review, firstly, the work analyzed the necessity and main features of venture capital promoting green innovation of entity industry. Greenization of venture capital was the key to promote green innovation of entity industry. Secondly, the mechanism that venture capital promoted green innovation of entity industry was analyzed through model construction. The results showed that...
The conventional micro-strip low-pass filter has the shortages of large size, narrow stop-band and wide transition band. To solve these problems, the Hilbert fractal defected ground structure (DGS) micro-strip low-pass filter is designed in this paper. The filter is cascaded by the Hilbert fractal DGS units and shunt branches. The Hilbert fractal DGS unit has a smaller size and can reduce the pass-band...
A fluorescent “turn‐on” probe for Fe3+ was investigated in an aqueous system based on a boron 2‐(2′‐pyridyl) imidazole complex (BOPIM‐dma). BOPIM‐dma shows weak or no fluorescence in polar solvents due to twisted intramolecular charge transfer, but the addition of Fe3+ to BOPIM‐dma leads to fluorescence switch‐on responses. The binding is highly selective to Fe3+ over other metal ions, indicating...
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