C. Sun

Beijing Institute of Petrochemical Technology

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Feng Yan Li

Tianjin Polytechnic University

Ya Jun Yang

Fudan University

Xiao Guang Ren

Electric Power Research Institute

A. Vantomme

KU Leuven

L. K. Huang

The University of Texas at Austin

Chuan He

Sichuan University

G. Langouche

KU Leuven

Mengmeng Lu

University of Calgary

Zhen Ming Wang

University of Science and Technology Liaoning

Yicheng Lu

Cooperative Institutions

Beijing Institute of Petrochemical Technology

Fudan University

KU Leuven

European Organization for Nuclear Research

Peking University

Tianjin Polytechnic University

State Key Laboratory of Genetic Engineering

Beijing University of Chemical Technology

Chinese Academy of Medical Sciences & Peking Union Medical College

Electric Power Research Institute

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Modification of surface mechanical properties of polycarbonate by B+ and O+ ions implantation

Acta Metallurgica Sinica (2002)

Shuo Yao C. Sun Sihua Zhou Chuangchuang Sun Yicheng Lu

By implanting B+ and O+ ions respectively into polycarbonate (PC) plates, the sur-face mechanical properties of PC have been improved. Measurement by Nano IndenterⅡ showed that the hardness of samples increased 7-25 times than that before implan-tation; and the modulus of elasticity raised 2-5 times. The wear-resistance was testedby ball crusher; the width and depth of the wear-streak decreased by 1/3-1/2 or evenmore. The structure, deformation and appearance were analyzed by using Micro-FTIR Spectra, ESCA method and the steps instrument. These analyses showed thatthe structure of PC had been modified: a series of new cross-linking yielded, it de-pends on the Linear Energy Transition (LET) of implanted ions in the high polymercompounds.

Polycarbonate

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Accelerating Seismic Migration Using FPGA-Based Coprocessor Platform

Chuan He Mengmeng Lu C. Sun

Migration is the most important seismic data processing method that recovers subsurface images of the Earth's interior using surface-recorded data volumes obtained from seismic reflection surveys. A reconfigurable coprocessor platform called SPACE (seismic data processing accelerator with reconfigurable engine) using field programmable gate array (FPGA) technology is proposed in this paper to speed up these computationally demanding and data-intensive seismic migration applications. The proposed SPACE platform is characterized by its simple architecture and abundant on-board memory resources along with ultra-wide memory bandwidth, which also makes the platform suitable for other seismic data processing methods or some large-scale scientific computing applications. The time-consuming kernel part of the pre-stack Kirchhoff time migration (PSTM) algorithm is programmed into the FPGA-based coprocessor platform, which acts as a hardware accelerator attached to an Intel-based workstation through the local peripheral controller interface (PCI) bus. Improved performance can be achieved by integrating a number of parallel running fully pipelined arithmetic modules into a single FPGA chip. Our simulation results show that the proposed coprocessor platform operating at a conservative speed of 50 MHz can calculate the Kirchhoff summations for 50 million points per second, which is about 15.6 times faster than a referential 2.4 GHz Pentium 4 workstation. The impressive performance of the proposed platform implies its broad applications in seismic data processing industry.

Coprocessor

Kernel (algebra)

Workstation

Speedup

10.1109/fccm.2004.12

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Study on the Waterproofing Agent for the Mineral Wool Board

Applied Mechanics and Materials (2012)

Dang Hui Dai C. Sun Feng Yan Li Ya Jun Yang Xiao Guang Ren

The petroleum resin emulsion was prepared from the C5-C9 petroleum resin, malay rosin, maleic anhydride, anhydrous aluminium sulfate, NaOH and water. The influence of manufacturing parameters on the emul¬sion included the modification time and temperature, the dosage of the malay rosin, the stabilizing agent and the alkali liquor. The test results showed that w (C5-C9)=31.5%, w (Maleic anhydride)=1.5%, w (Maleic rosin)=10%, w (anhydrous aluminium sulfate)=0.6%, the alkali liquor was NaOH with 10% concentration, the modification temperature was 200 °C, the the modification time was 3 hours, the saponification temperature was 120 °C, the saponification time was half an hour, the emulsifying temperature was 95°C. Under these conditions, the petroleum resin emulsion was prepared with its particle size equating to 111.193 μm.

Maleic anhydride

Anhydrous

Saponification

10.4028/www.scientific.net/amm.204-208.3672

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Citations (4)