Applied Mechanics and Materials Vols. 411-414

Abstract: In this note, we establish a converse comparison theorem for backward stochastic differential equations (BSDEs).

Abstract: A novel quadratic spline Hermite interpolation method for constraining the slope of interpolation curve in a user-defined interval is proposed. The method solves the interpolation problem by dividing point sequence into a series of two adjacent points. By selecting the slopes of these two points skillfully, the slope of interpolated curve can be constrained easily. Then, the entire interpolated curve can be obtained by linking all of these two-point interpolated curves. A series of experiments are carried out to test the performance of these methods. Experimental results show that this method reach expected results perfectly.

Abstract: We present the time-varying critical fertility and analysis the stability of the system at the critical value. Then we get the sufficient conditions about the system stability, asymptotically stability and not. Keywords: Population development system; mortality rates; Critical fertility rate of women; stability

Abstract: By using Delaunay triangulation algorithm, triangulating with split-merge algorithm and the incremental insertion algorithm, improving the judgment that if the new inserted point meets the Delaunay triangulation "empty circle" criterion in synthesis algorithm, meanwhile, with the corresponding improvement of the LOP optimization algorithm, the design of weldment model in the virtual welding system has achieved good result.

Abstract: In this paper the asymptotic stability of global solutions to the initial-boundary value problem for some nonlinear wave equation with nonlinear damping and source terms is studied by using a difference ineauality.

Abstract: In this paper, a small aperture Cassegrain antenna of 8mm band detector is optimally designed, whose main reflector diameter is limited at 96mm (diameter less than 30λ). After design and processing, this antenna measured results show its gain is 26dB, the sidelobe level is close to-12dB and-3dB beam-width is 4.8 °.These are consistent with simulation optimization results.

Abstract: Abstract. A STM32-based embedded system for 3mm wave detector calibration control platform is introduced in this paper. This embedded control system includes noise source control circuit, database circuit, a real time clock circuit, humidity and temperature sensor circuit, PS/2 interface circuit and SD card interface circuit. Experiment results demonstrate that the Embedded system could satisfy the requirement of millimeter wave detector calibration.

Abstract: In the practice ,the transient state decided by the system character is the key of the automation of machine health monitor process. FFT and Wavelet Transform are the well known techniques in this field. We proposed an solution combined Wavelet Transform with FFT and build a real system to monitor the onshore structures. Unlike other similar systems, our system is automatic through self-calibration and health fault detection, stream data mining of the sensor data acquired from the Motors, Generators .

Abstract: Polyethylene is widely used as mulching plastic film in china cotton area. Collecting plastic film residue using machine is difficult. The cotton mixed with plastic film residue is badly harmful to cotton production, and causes great loss to cotton spinning enterprise. The detection system for cotton plastic covering using ultrasonic is developed in the paper. Sound wave echo method is used to detect plastic film residue mixed in seed cotton. The SCM is used to process echo signal and compensate measurement error caused by temperature variation. Experimental result shows that the system developed in the paper have features of low lost, high detection accuracy, high resolution and it has broad prospect in application.

Abstract: This paper designs a multi parameter real-time water quality on-line monitoring system for aquaculture water. This system achieves the online monitoring among temperature, turbidity, DO (dissolved oxygen), pH and electrical conductivity. The crosstalk, produced by the simultaneous measurement with DO and pH sensors, will affect accuracy and stability of monitoring results. This paper analyzes the source of crosstalk, describes a circuit model of causing crosstalk, and designs an isolated circuit between powers and signals as well. The experimental results show that, the real-time monitoring of DO and pH has the characteristics of speediness, high precision, small error and low noise.