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A Precise Sensor for SF_6 Based on Piezoelectric ultrasound

稀有金属材料与工程 2006年第A03期35卷 157-158页

作者： Changping Zhu Minglei Shan Hongping Zhang Xiaohua Zhang Peng Zhen Yuanyun Tao Department of Computer ＆ Information Engineering Hohai University Changzhou 210032 China State Key Laboratory of Hydrology-water Resources And Hydraulic Engineering Hohai University Nanjing 210098 China Data Division of ZTE Corporation Nanjing 210012 China East China University of Science ＆ Technology Shanghai 200237 China

Based on piezoelectric ultrasound technology,the paper theoretically analyses the determination of gas concentration and presents a norm-contrast method,which is realized by high-speed chip CPLD (Complex programmable logic device),to determine the concentration of SF_6 accurately with air as *** is proved that this sensor can determine the concentration of SF_6 with the precision of 50μg/*** sensor is in the process of producing.

关键词： ultrasound detection gas concentration CPLD

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A Precise Sensor for SF6 Based on Piezoelectric ultrasound

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稀有金属材料与工程 2006年第S3期 157-158页

作者： Changping Zhu~(1,2) Minglei Shan~1 Hongping Zhang~1 Xiaohua Zhang~1 Peng Zhen~(1,3) Yuanyun Tao~(1,4) (1.Department of Computer & Information Engineering,Hohai University,Changzhou 210032,China) (2.State Key Laboratory of Hydrology-water Resources And Hydraulic Engineering,Hohai University,Nanjing 210098,China) (3.Data Division of ZTE Corporation,Nanjing 210012,China) (4.East China University of Science & Technology,Shanghai 200237,China)

Based on piezoelectric ultrasound technology,the paper theoretically analyses the determination of gas concentration and presents a norm-contrast method,which is realized by high-speed chip CPLD （Complex programmable logic device）,to determine the concentration of SF6accurately with air as *** is proved that this sensor can determine the concentration of SF6with the precision of 50μg/*** sensor is in the process of producing.

关键词： ultrasound detection gas concentration CPLD

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Changes following denervation to the masseter muscle

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Neural Regeneration Research 2008年第4期3卷 363-366页

作者： Lei Zhang The 371 Central Hospital of Chinese PLA Xinxiang 453000 Henan Province China

BACKGROUND： Masseter muscle nerve is often injured in mandible osteotomy. What changes in food intake and masseter muscle will be brought after masseter muscle nerve injury？ OBJECTIVE： This study was designed to selectively establish animal models of denervated masseter muscle and investigate the effects of severing masseter muscular nerve on masseter muscle and animal＇s food intake. DESIGN, TIME AND SETTING： A randomized controlled animal experiment was performed at the Laboratory Animal Center, Nanfang Hospital, Southern Medical University from September to November 2005. MATERIALS： A total of 50 healthy, adult, SPF-grade, New Zealand rabbits, of both genders, were used to develop an animal model of selectively denervated masseter muscle. METHODS： Five rabbits were randomly selected as normal controls. According to various mutilation methods, the remaining animals were randomly divided into 3 experimental groups, with 15 rabbits in each group： masseter muscular neural stem denervated, masseter muscular neural superior branch-denervated, and masseter muscular neural inferior brancb-denervated groups. Self-control comparison was performed on each animal. The right masseter muscle served as the experimental side, and the left masseter muscle served as the control side. In each group, 3 time points （2, 8, and 24 weeks post-surgery） were allotted for observation. MAIN OUTCOME MEASURES： At the pre-set time points, masseter muscular thickness was measured with a Logic 500 color Doppler ultrasonic diagnostic apparatus. Masseter muscle tissue was resected for hematoxylin eosin staining. Masseter muscular fiber diameter and area were measured with an optical microscope. Masseter muscle tissue was sectioned and nicotinamide adenine dinucleotide tetrazolium oxidoreductase （NADH-TR） and adenosine triphosphatase staining were performed. Following staining, the sections were quantitatively analyzed using an IBAS200 image analyzer. RESULTS： Post-surgery food intake： No abnormal f

关键词： masseter muscle denervation ultrasound detection immunohistochemistry muscle fiber

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