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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 不同抗生素压力下中、高温厌氧消化对剩余污泥中抗性基因的控制研究 学位论文 博士, 北京: 中国科学院研究生院, 2015 作者:  田哲 收藏  |  浏览/下载：75/0  |  提交时间：2016/08/05 抗生素  抗性基因  剩余污泥  中温厌氧消化  高温厌氧消化  控制，Antibiotics  Antibiotic resistance genes  Excess sludge  Mesophilic anaerobic digestion  Thermophilic anaerobic digestion  Control   种子中特异表达IPT基因的植物双元载体构建及转基因水稻获得 期刊论文 2015 张红心; 王桂兰; 陈超; 赵璞; 马春红 收藏  |  浏览/下载：5/0  |  提交时间：2016/05/17 PG-5α启动子  IPT  p1300-pPG-5α-IPT-Nos  水稻  遗传转化  The promoter of PG-5α  IPT  p1300-p PG-5α-IPT-Nos  Oryza sativa  Transformation   酿酒酵母菊糖发酵产乙醇代谢工程研究 学位论文 博士, 北京: 中国科学院研究生院, 2013 作者:  袁 博 收藏  |  浏览/下载：120/0  |  提交时间：2013/07/13 菊糖酶  Candida kutaonensis  蛋白纯化  燃料乙醇  代谢工程   A small thickness measurement system based on PSD and FPGA (EI CONFERENCE) 会议论文 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China Guo J.; He X.; Wei Z.; Wu Y. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 Considering that the requirement of industrial manufacture  An AT89S51 singlechip works as the core processor of the system. By two laser triangulation  a small thickness measurement system based on PSD and FPGA is presented. It takes S3931 PSD of one dimension as position detection device  A FPGA produces logic control signals for the whole system  the small displacement is converted to differential voltages  which is made by Hamamatsu in Japan  and after amplification and A/D transformation  8-bit parallel data is send to singlechip from FPGA by external interrupts  and the final calculation results output to the LCD display module. After digital micro meter calibration  we get the small thickness. Experiments show that the detection accuracy of the system is not less than 10um.