Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》
Abstract： Surface instability of hard films adhered on soft substrate has always been a difficult problem forflexible electronic devices. Considering the shear stress between the bi-layer film and the elastic gradedsubstrate , an analytical model of bi-layer film/ elastic graded substrate is established.By using the dis-placement continuity of the interface , the analytical expressions of the critical strain and wavelength of thebi-layer film/elastic graded substrate are obtained. Then , through several examples , the validities of theproposed expressions are verified which are compared with those results obtained by the finite element analysis.At the same time, the influences of the geometric parameters of the bi-layer film and physical pa-rameters of the elastic graded substrate on the buckling behavior are analyzed. 'The results in this papershow that decreasing the thickness of device layer or increasing the thickness of encapsulation layer canimprove the stability of bilayer film/elastic graded substrate structure; if the substrate is relatively“soft”orthe device layer is “hard”,the shear force of the interface between the device layer and the substrate willbe taken into account , which can prevent the resistance of the three-layer film/ substrate structure from un-dergoing interface failure.Above all, the research will provide theoretical support for the fabrication of flex-ible electronic devices with hard film/elastic graded substrate structure.
Subjects: Biology >> Botany >> Applied botany submitted time 2020-11-27 Cooperative journals: 《广西植物》
Abstract：大豆RLPK2 基因（GenBank 登录号: AY687391）是一个编码N-末端富含亮氨酸重复序列的类受体蛋白激酶基因。为分析大豆RLPK2 基因的功能，通过农杆菌介导法转化野生型拟南芥，构建了大豆RLPK2 基因过表达载体。该研究以野生型拟南芥和大豆RLPK2 基因过表达拟南芥植株为材料，分析了叶片衰老过程中叶绿素荧光参数、抗氧化酶活性及衰老相关基因表达量的变化。结果表明：（1）无论是野生型还是转基因拟南芥，随着叶片衰老进程的进行，光系统II（PSII）的最大光化学效率（Fv/Fm）、PSII 实际光化学效率（ΦPSII）、光化学淬灭系数（qP）和光合电子传递速率（ETR）均呈下降趋势，但后者下降趋势更明显；（2） 激发压（1-qP）在叶片衰老前期的变化较为平稳，后期则急剧增加，且转基因型比野生型拟南芥增加更明显；（3）在叶片衰老的各个时期，转基因拟南芥叶片丙二醛（MDA）含量均显著高于野生型，而超氧化物岐化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性均显著低于野生型；（4）实时荧光定量PCR 检测结果表明，RLPK2 转基因拟南芥中衰老标志基因ATSAG12，衰老关键转录因子ATNAP、ATWRKY6 和叶绿素降解关键酶编码基因ATACD1 等表达量显著上调。综上所述，大豆类受体蛋白激酶基因RLPK2 参与调控植物叶片衰老进程，其表达对叶片衰老起促进作用。
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] The classics are the carrier of Chinese traditional culture, thought and wisdom. Combining the methods of data acquisition, labeling and analysis of digital humanities, it is of great significance for the automatic entity recognition of classics for subsequent application research. [Method/process] The corpus was constructed based on 25 pre-Qin literature that have been automatically segmented and manually annotated, based on the corpus of different sizes and seven deep learning models of Bi-LSTM, Bi-LSTM-Attention, Bi-LSTM-CRF, Bi-LSTM-CRF-Attention, Bi-RNN, Bi-RNN-CRF and BERT, we extracted the corresponding entities that constituted historical events and compared their effects.[Result/conclusion] The accuracy of the Bi-LSTM-Attention and Bi-RNN-CRF models trained on all corpus reached 89.79% and 89.33%, respectively, confirming the feasibility of applying deep learning to large-scale text datasets.
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