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Study on the Vegetable Brand Construction in Hebei Province Based on Agricultural Supply Side Structural Reform 被引量:1
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作者 Chunfeng ZHANG Xiao ZHANG +3 位作者 Haichen SUN Jian SONG wenqi dong Muqiang HU 《Agricultural Science & Technology》 CAS 2017年第10期1989-1992,共4页
Strengthening brand construction should be the starting point for the development of vegetable industry, and the key point of upgrading quality, enhancing efficiency and transforming the development pattern in Hebei P... Strengthening brand construction should be the starting point for the development of vegetable industry, and the key point of upgrading quality, enhancing efficiency and transforming the development pattern in Hebei Province. In view of the current situation of vegetable industry in Hebei Province, such as market saturation, quality upgrading, and the problems existing in the development of vegetable brands, some ideas and suggestions were put forward to strengthen the development of brand vegetables in Hebei Province. 展开更多
关键词 VEGETABLE Supply-side reform BRAND Hebei Province
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Quantum Steganography Application in the Electrical Network for Quantum Image and Watermark with Self-Adaptive
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作者 Jie Shen wenqi dong +2 位作者 Jing Wang Yang Wang Haiyan Li 《Journal of Information Hiding and Privacy Protection》 2021年第3期109-120,共12页
With the development of Globe Energy Internet,quantum steganography has been used for information hiding to improve copyright protection.Based on secure quantum communication protocol,and flexible steganography,secret... With the development of Globe Energy Internet,quantum steganography has been used for information hiding to improve copyright protection.Based on secure quantum communication protocol,and flexible steganography,secret information is embedded in quantum images in covert communication.Under the premise of guaranteeing the quality of the quantum image,the secret information is transmitted safely with virtue of good imperceptibility.A novel quantum watermark algorithm is proposed in the paper,based on the shared group key value of the communication parties and the transmission of the selected carrier map pixel gray higher than 8 bits.According to the shared group key value of the communication parties,the two effective Bell state qubits of the carried quantum streak image are replaced with secret information.Compared with the existing algorithms,the new algorithm improves the robustness of the secret information itself and the execution efficiency of its embedding and extraction.Experimental simulation and performance analysis also show that the novel algorithm has an excellent performance in transparency,robustness and embedded capacity. 展开更多
关键词 Quantum steganography FSQb quantum image secret information quantum watermark
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金属氧化物对磷酸盐吸附的预测及分子机制 被引量:1
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作者 伍天翔 董文琪 +5 位作者 张强强 黄杨 杨静媛 蔡喜运 陈景文 李雪花 《科学通报》 EI CAS CSCD 北大核心 2022年第28期3476-3486,共11页
金属氧化物吸附剂由于其优异的性能和稳定性而成为有前景的磷酸盐去除材料。揭示纳米金属氧化物吸附磷酸盐的关键影响因素和吸附机制,对吸附磷酸盐金属基材料的设计至关重要.因此,本研究测定了32种金属氧化物的磷酸盐吸附量,通过Relief... 金属氧化物吸附剂由于其优异的性能和稳定性而成为有前景的磷酸盐去除材料。揭示纳米金属氧化物吸附磷酸盐的关键影响因素和吸附机制,对吸附磷酸盐金属基材料的设计至关重要.因此,本研究测定了32种金属氧化物的磷酸盐吸附量,通过ReliefF算法识别影响金属氧化物吸附磷酸盐的关键描述符,基于此建立了对磷酸盐吸附的预测模型,并采用密度泛函理论(density functional theory,DFT)模拟了磷酸盐在6种典型金属氧化物表面的吸附。结果显示,金属氧化物的电负性和阳离子电荷是决定磷酸盐吸附的关键因素采用6种机器学习算法构建了可筛选高吸附量金属氧化物的预测模型,决策树模型的训练集和验证集的预测准确度超过90%.DFT计算结果表明,金属原子d轨道与磷酸基团氧原子p轨道的相互作用是决定金属原子和氧原子成键的关键,阐明了金属原子d轨道能级决定磷酸基团吸附能的新机制.本研究所建立的预测模型可为筛选吸附磷酸盐的金属基材料提供依据,DFT计算揭示的分子机制可为吸附剂的设计提供理论基础. 展开更多
关键词 磷酸盐去除 吸附剂 金属氧化物 机器学习 密度泛函理论
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Temperature acclimation in hot-spring snakes and the convergence of cold response
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作者 Chaochao Yan Wei Wu +5 位作者 wenqi dong Bicheng Zhu Jiang Chang Yunyun Lv Shilong Yang Jia-Tang Li 《The Innovation》 2022年第5期97-106,共10页
Animals have evolved sophisticated temperature-sensing systems and mechanisms to detect and respond to ambient temperature changes.As a relict species endemic to the Qinghai-Tibet Plateau,hot-spring snake(Thermophis b... Animals have evolved sophisticated temperature-sensing systems and mechanisms to detect and respond to ambient temperature changes.As a relict species endemic to the Qinghai-Tibet Plateau,hot-spring snake(Thermophis baileyi)survived the dramatic changes in climate that occurred during plateau uplift and ice ages,providing an excellent opportunity to explore the evolution of temperature sensation in ectotherms.Based on distributional information and behavioral experiments,we found that T.baileyi prefer hotspring habitats and respond more quickly to warmth than other two snakes,suggesting that T.baileyi may evolve an efficient thermal-sensing system.Using high-quality chromosome-level assembly and comparative genomic analysis,we identified cold acclimation genes experiencing convergent acceleration in high-altitude lineages.We also discovered significant evolutionary changes in thermosensation-and thermoregulation-related genes,including the transient receptor potential(TRP)channels.Among these genes,TRPA1 exhibited three species-specific amino acid replacements,which differed from those found in infrared imaging snakes,implying different temperature-sensing molecular strategies. 展开更多
关键词 HABITAT SPRING SNAKE
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