Applied Mechanics and Materials Vols. 130-134

Abstract: In this paper, a novel architecture of a real-time CNC interpolation ASIC for Pythagorean Hodograph curve based on FPGA is proposed. The ASIC built on a single FPGA chip contains a NikosⅡprocessor core. It uses a two-stage interpolation scheme to reduce the computational burden of PH curve interpolation. Firstly, the 1^st-stage interpolation program is operated on the NikosⅡprocessor. The FPGA hardware logic performs the 2^nd-stage interpolation and outputs two groups of pulses for the motion control of actuators (two stepper motors)

Abstract: Compressed Air Energy Storage (CAES) is besides pumped hydropower, the other solution for large energy storage capacity. It can balance fluctuations in supply and demand of electricity. It can meet the challenge of load fluctuations of wind power especially. In CAES technology, air is compressed with a motor/generator using low cost, off-peak or discarded electricity from wind power and stored underground in caverns or porous media. This is called energy storage subsystem. The energy storage subsystem of CAES include: compressing air process and air lose heat process. The equipments of it are organized with different schemes in this paper. Optimization and performance simulation of it are made. The performance data are contrasted.

Abstract: In this paper, a low profile printed antenna with dual-band operation for wireless localarea network (WLAN) applications is presented. It provides two separate impedance bandwidths of0.49GHz (2.3-2.79GHz) and 2.22GHz (4.92-7.14GHz). The proposed microstrip-fed antennaconsists of two arc-shaped strips with a nipped stub and a defected ground plane. The proposedantenna occupies a small size (40mm×25mm×1.59mm) and is fabricated and measured. Good omnidirectionalradiation patterns and enough gains across the operation bands are obtained. Thesimulated results are in good agreement with the measured. The effects of the key structureparameters on the antenna performances are also analyzed and presented.

Abstract: In this paper, a novel slot-ring coupling antenna with reconfigurable circular polarization is presented. The antenna consists of Wilkinson power divider and a slot-ring with perturbations. By controlling the states of the switches, the antenna can achieve right-hand circular polarization (RHCP), left-hand circular polarization (LHCP) in the same direction, respectively. The proposed antenna is designed and simulated using Ansoft HFSS. The measured results of the fabricated antenna are in good agreement with the simulated. Both measured and simulated results of the antenna are presented and discussed.

Abstract: Retracted paper: Unified read-write information have led to many theoretical advances, including Internet QoS and Internet QoS. After years of compelling research into thin clients, we confirm the emulation of the lookaside buffer. We explore a novel framework for the study of IPv7, which we call LeafedLyne.

Abstract: In this paper, a rectangle patch antenna at 2.53GHz is designed for LTE system. In order to acquire the desired center frequency, width of the conductor in the antenna is adjusted before and after impedance matching. At last, the patch antenna get 2.96dB gain and VSWR less than 1.8 during bandwidth of 40MHz.

Abstract: A series of electrical parameters is used to describe the performance of antenna. Antenna pattern which is the main electrical parameter of antenna shows an aerial image of radiation field. The antenna pattern simulation system which can make antenna users install the antenna visual is developed in Visual Studio 2005 with the application of MFC programming technology. Test results show that the antenna pattern simulation system is effective.

Abstract: The MCU has the smaller volume, low cost, face control, antijamming ability strong and so on merits, GPRS is based on the GSM development foundation in data traffic. one kind of GPRS system Has been designed by using MCU STC12C5A60S2, it including correspondence transformation connection, SIM300 module, MCU, display circuit, keyboard electric circuit, RS232 exterior serial communication connection and so on. The related hardware welding on the PCB, the software programming after-burning writes in the MCU, inserts the liquid crystal display monitor and the SIM card, joins the receiver and the microphone, connects the good GPRS antenna. On the electricity, the establishment correspondence transformation connection, may realize the close-down, the dial and the answering telephone, transmits and receives the SMS, to receive and dispatch E-mail, carries on the Internet to glance over and so on, indicated that has achieved the design requirements.

Abstract: This paper presents a two-dimensional (2D) digital focusing method to alleviate the compromise between the resolution and depth of field (DOF) in spectral domain optical coherence tomography (SDOCT). A scalar diffraction model is developed to simulate the wave propagation process from out-of-focus scatterers and the inverse scattering problem is solved. The wavenumber domain algorithm is applied to improve the transverse resolution, and the matched filter to improve the axial resolution. Image reconstruction with spatially invariant resolution can be achieved. The 2D imaging experimental results of fresh pig liver prove the effectiveness of the proposed method.

Abstract: A multi-wavelength fiber laser with a narrow bandwidth based on an erbium-doped fiber ring filter and multimode fiber Bragg grating (MM-FBG) has been proposed, a high finesse fiber ring filter are introduced .The fiber ring filter consists of two optical couplers and a section of weak pumped erbium-doped fiber (EDF）. Thanks to the delay of cavity length and the gain generated by the EDF, the filter has spectral response with a high finesse. The incorporation of the fiber ring filter leads to the suppression of undesirable mode and makes the output laser narrower bandwidth. With 980 nm LD pumped, at the room temperature, the space of the two wavelengths is 0.07nm, which improved the effect of the filter.