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一流专业建设背景下化学实验教学示范中心的改革与实践
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作者 张越 尚成新 +8 位作者 张彩红 裴继凯 石利红 高鹏飞 贾志奇 王松柏 郝俊生 张国梅 郭炜 《大学化学》 CAS 2024年第7期207-210,共4页
本文以山西大学化学实验教学示范中心为例,探讨了一流专业建设背景下化学实验教学示范中心的改革方向与实践措施。中心围绕学生“知识、能力、质素”协调发展的理念,坚持“三全育人”,以“立足化学优势,服务山西煤基产业”为特色发展方... 本文以山西大学化学实验教学示范中心为例,探讨了一流专业建设背景下化学实验教学示范中心的改革方向与实践措施。中心围绕学生“知识、能力、质素”协调发展的理念,坚持“三全育人”,以“立足化学优势,服务山西煤基产业”为特色发展方向,以创新实验、虚拟仿真实验、课程群建设为抓手,开展了一系列改革措施,取得了显著成效。 展开更多
关键词 一流专业建设 化学实验 教学改革
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Electrically programmable phase-change photonic memory for optical neural networks with nanoseconds in situ training capability 被引量:5
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作者 Maoliang Wei Junying Li +18 位作者 Zequn Chen Bo Tang zhiqi jia Peng Zhang Kunhao Lei Kai Xu jianghong Wu Chuyu Zhong Hui Ma Yuting Ye jialing jian Chunlei Sun Ruonan Liu Ying Sun Wei.E.I.Sha Xiaoyong Hu jianyi Yang Lan Li Hongtao Lin 《Advanced Photonics》 SCIE EI CAS CSCD 2023年第4期42-50,共9页
Optical neural networks (ONNs), enabling low latency and high parallel data processing withoutelectromagnetic interference, have become a viable player for fast and energy-efficient processing andcalculation to meet t... Optical neural networks (ONNs), enabling low latency and high parallel data processing withoutelectromagnetic interference, have become a viable player for fast and energy-efficient processing andcalculation to meet the increasing demand for hash rate. Photonic memories employing nonvolatile phase-change materials could achieve zero static power consumption, low thermal cross talk, large-scale, andhigh-energy-efficient photonic neural networks. Nevertheless, the switching speed and dynamic energyconsumption of phase-change material-based photonic memories make them inapplicable for in situ training.Here, by integrating a patch of phase change thin film with a PIN-diode-embedded microring resonator,a bifunctional photonic memory enabling both 5-bit storage and nanoseconds volatile modulation wasdemonstrated. For the first time, a concept is presented for electrically programmable phase-changematerial-driven photonic memory integrated with nanosecond modulation to allow fast in situ training and zerostatic power consumption data processing in ONNs. ONNs with an optical convolution kernel constructedby our photonic memory theoretically achieved an accuracy of predictions higher than 95% when testedby the MNIST handwritten digit database. This provides a feasible solution to constructing large-scalenonvolatile ONNs with high-speed in situ training capability. 展开更多
关键词 phase-change materials optical neural networks photonic memory silicon photonics reconfigurable photonics
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Inducible Positive Mutant Screening System to Unveil the Signaling Pathway of Late Blight Resistance 被引量:3
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作者 zhiqi jia Yanhonq Cui +3 位作者 Ying Li Xiaoxuan Wang Yonqchen Du Sanwen Huang 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2010年第5期476-484,共9页
Late blight is the most devastating potato disease and it also causes serious yield loss in tomato. Several disease resistance genes (R genes) to late blight have been cloned from potato in the past decade. However,... Late blight is the most devastating potato disease and it also causes serious yield loss in tomato. Several disease resistance genes (R genes) to late blight have been cloned from potato in the past decade. However, the resistance mechanisms remain elusive. Tomato and potato belong to the botanical family Solanaceace and share remarkably conserved genome structure. Since tomato is a model system in genetic and plant pathology research, we used tomato to develop a powerful mutant screening system that will greatly facilitate the analysis of the signaling pathway of resistance to Phytophthora infestans. First we proved that the R3a transgenic tomatoes developed specific hypersensitive cell death response (HR) to P. infestans strains carrying the corresponding avirulence gene Avr3a, indicating that the signaling pathway from the R3a-Avr3a recognition to HR is conserved between potato and tomato. Second, we generated transgenic tomatoes carrying both R3a and Avr3a genes, with the latter under the control of a glucocorticiod-inducible promoter. Dexamethasone induced expression of Avr3a and resulted in localized HR. This versatile system can be used to construct a mutant library to screen surviving mutants whose resistance signal transduction was interrupted, providing the basis to identify key genes involved in the resistance to late blight in Solanaceae. 展开更多
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