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Systemically functional characterization of regiospecific flavonoid O-methyltransferases from Glycine max

Synthetic and Systems Biotechnology 2024年第2期9卷 340-348页

作者： Bingtong Feng Yuguo Jiang Xiaodong Li Yan Wang ziyu ren Jian Lu Xing Yan Zhihua Zhou Pingping Wang Life Science and Technology College Guangxi UniversityNanningGuangxi530004China CAS-Key Laboratory of Synthetic Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai200032China University of Chinese Academy of Sciences Beijing100049China The College of Life Sciences Shanghai Normal UniversityShanghai200234China

Plants produce diverse flavonoids for defense and stress resistance,most of which have health benefits and are widely used as food additives and *** of the free hydroxyl groups of flavonoids,catalyzed by S-adenosyl-l-methionine-dependent O-methyltransferases(OMTs),significantly affects their physicochemical properties and ***(Glycine max)contain a rich pool of O-methylated ***,the OMTs responsible for flavonoid methylation in *** remain largely *** screened the *** genome and obtained 22 putative OMT-encoding genes that share a broad spectrum of amino acid identities(25–96%);among them,19 OMTs were successfully cloned and heterologously expressed in Escherichia *** used the flavonoids containing the free 3,5,7,8,3′,4′hydroxyl group,such as flavones(luteolin and 7,8-dihydroxyflavone),flavonols(kaempferol and quercetin),flavanones(naringenin and eriodictyol),isoflavonoids(daidzein and glycetein),and caffeic acid as substrates,and 15 OMTs were proven to catalyze at least one *** methylation activities of these GmOMTs covered the 3,7,8,3′,4′-hydroxyl of flavonoids and 7,4′-hydroxyl of *** systematic characterization of *** flavonoid OMTs provides insights into the biosynthesis of methylated flavonoids in soybeans and OMT bioparts for the production of methylated flavonoids via synthetic biology.

关键词： Flavonoids O-methyltransferases Glycine max Functional characterization

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A survey on fabrication,control,and hydrodynamic function of biomimetic robotic fish

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Science China(Technological Sciences) 2017年第9期60卷 1365-1380页

作者： YU JunZhi WEN Li ren ziyu State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences School of Mechanical Engineering and Automation Beihang University

Understanding and replicating the locomotion principles offish are fundamental in the development of artificial fishlike robotic systems,termed robotic *** paper has two objectives:(1) to review biological clues on biomechanics and hydrodynamic flow control offish swimming and(2) to summarize design and control methods for efficient and stable swimming in robotic *** review of state-of-the-art research and future-oriented new directions indicates that fish-inspired biology and engineering interact in mutually beneficial *** strong interaction offers an important insight into the design and control of novel fish-inspired robots that addresses the challenge of environmental uncertainty and competing objectives;in addition,it also facilitates refinement of biological knowledge and robotic strategies for effective and efficient swimming.

关键词： fish swimming robots robotic fish hydrodynamics motion control

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基于自动化控制技术的输配电运行故障检测研究

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通信电源技术 2024年第9期41卷 231-233页

作者：任梓瑜张薇国网顺平县供电公司河北保定072250

随着电网的日益复杂和负荷的持续增长,系统故障的可能性也随之增加,这对于维护电网的稳定运行和提高供电可靠性提出了更高的要求。自动化控制技术能够实现对电网运行状态的实时监控,及时发现并定位故障,提高了故障处理的效率和准确性。... 详细信息

随着电网的日益复杂和负荷的持续增长,系统故障的可能性也随之增加,这对于维护电网的稳定运行和提高供电可靠性提出了更高的要求。自动化控制技术能够实现对电网运行状态的实时监控,及时发现并定位故障,提高了故障处理的效率和准确性。文章通过分析输配电系统的工作原理及其常见的故障类型,探讨自动化技术在当前的发展现状,并重点研究自动化控制技术在故障检测中的应用。通过对传感器技术和智能算法的深入分析,展示了如何利用这些技术实现对输配电系统故障的有效检测,包括故障的快速识别、准确定位以及及时处理。

关键词：自动化控制输配电运行故障检测

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人工智能技术在电力系统中的应用

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集成电路应用 2024年第7期41卷 356-357页

作者：张薇任梓瑜国网河北省电力有限公司顺平县供电分公司河北072250

阐述电力系统生产运行中的人工智能技术应用特点,探讨其应用路径,包括构建代理模型、优化电力系统代理操作流程、形成智能化框架、灵活应用人工智能技术,多元化满足运行需求。

关键词：智能技术代理模型操作流程

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凝视与想象:《回响》的回响——东西小说《回响》和电视剧《回响》读札

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辽宁师范大学学报（社会科学版） 2024年第1期47卷 9-13页

作者：石竹青任子钰辽宁师范大学影视艺术学院辽宁大连116081

文学作品文本与影视艺术剧本的改编由来已久。可以说,中国现当代文学作品,始终为影视创作提供着不竭的文学、文化支撑。影视短剧《回响》以其超高的文本还原度,深度地反映当下的现实情境和时代症候,在想象与现实的缝隙中建构起能够触摸... 详细信息

文学作品文本与影视艺术剧本的改编由来已久。可以说,中国现当代文学作品,始终为影视创作提供着不竭的文学、文化支撑。影视短剧《回响》以其超高的文本还原度,深度地反映当下的现实情境和时代症候,在想象与现实的缝隙中建构起能够触摸灵魂、心灵的场域,激发起警示人性的回响。本文通过对东西的长篇小说《回响》的影视化改编进行分析,从改编策略、主题哲思与心理关照等角度切入,探究在文学与影视交融中,在镜像呈现与文学想象之间,对于现实、人生和时代的多重反思和建构。

关键词：《回响》文学改编文学性想象人性

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Linear Acceleration of an Undulatory Robotic Fish with Dynamic Morphing Median Fin under the Instantaneous Self-propelled Condition

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Journal of Bionic Engineering 2020年第2期17卷 241-253页

作者： Wenguang Sun Zemin Liu ziyu ren Gang Wang Tao Yuan Li Wen School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412000China

Fish commonly execute rapid linear accelerations initiated during steady swimming,yet the function of the median fins during this process is less *** find that the erection/folding time(from the starting time of the linear acceleration(0 s)to the starting time of the folding movement of the fin),as well as the spreading area of the median fins,actively change during the linearacceleration of the live largemouth bass(Micropterus salmoides).To better understand the influence of the folding time and the area change of the median fins on the linear acceleration,we implemented an undulatory biomimetic robotic fish with soft median fins that can be programmed to erect and fold,just like a live *** characterize the acceleration performance of the robotic fish,we developed a"self-propelled"experiment technique based on the Kalman filter and Proportional-Integral-Derivative(PID)control *** experiments on the robotic fish show the acceleration induced by fully-erected median fins increases by 46.3%.Fully-erected median fins positively contribute to propulsion primarily at the onset stage of the linear acceleration while result in a significant decrease in steady swimming speed by 25%,which suggests a large drag force is induced at the steady swimming stage due to the enlarged wetted *** sweeping experiments on erection/folding time and spreading area demonstrate a proper combination of the erection/folding time and the spreading area enhances the mean linear acceleration by up to 85%.Particle Image Velocimetry(PIV)results reveal that the vortexes shed by the erected dorsal fin are stronger than those shed by the folded *** the acceleration process progresses,the thrust generated by the dorsal fins gradually is weakened until only resistance is generated in the *** findings may shed light on the realization of controllable surfaces on high performance fish-inspired robotic systems in the future.

关键词： robotic fish linear acceleration median fin instantaneous self-propelled system

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液相色谱串联质谱内标法测定鸡血浆中替米考星含量

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中国家禽 2024年第7期46卷 67-73页

作者：闫隆娟任子昱李慧素杨洁袁聪孟蕾张盼盼刘婷婷吴志明河南农业大学动物医学院河南郑州450002 河南省农畜水产品检验技术研究院河南郑州450008

研究旨在建立测定鸡血浆中替米考星含量的液相色谱串联质谱内标法。试验采用甲醇-乙腈(1∶3)溶液提取鸡血浆中替米考星,以0.1%甲酸乙腈-0.1%甲酸水为流动相,液相色谱串联质谱法测定,内标法定量。结果显示:鸡血浆中替米考星在25~2 000 ng... 详细信息

研究旨在建立测定鸡血浆中替米考星含量的液相色谱串联质谱内标法。试验采用甲醇-乙腈(1∶3)溶液提取鸡血浆中替米考星,以0.1%甲酸乙腈-0.1%甲酸水为流动相,液相色谱串联质谱法测定,内标法定量。结果显示:鸡血浆中替米考星在25~2 000 ng/mL浓度范围内呈线性关系,相关系数(r)大于0.999 9;替米考星在鸡血浆中的检测限为15 ng/mL,定量限为25 ng/mL,添加浓度为25~1 500 ng/mL时,批内平均回收率为96.5%~102.3%,批内、批间变异系数均小于3.2%。研究表明,建立的液相色谱串联质谱内标法前处理过程简单、快速,选择性好,灵敏度、准确度和精密度较高,适用于鸡血浆中替米考星含量的检测。

关键词：替米考星鸡血浆液相色谱串联质谱法内标法

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The Roadmap of 2D Materials and Devices Toward Chips

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Nano-Micro Letters 2024年第6期16卷 343-438页

作者： Anhan Liu Xiaowei Zhang ziyu Liu Yuning Li Xueyang Peng Xin Li Yue Qin Chen Hu Yanqing Qiu Han Jiang Yang Wang Yifan Li Jun Tang Jun Liu Hao Guo Tao Deng Songang Peng He Tian Tian‑Ling ren School of Integrated Circuits and Beijing National Research Center for Information Science and Technology(BNRist) Tsinghua UniversityBeijing 100049People’s Republic of China School of Microelectronics Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of Dynamic Measurement Technology Shanxi Province Key Laboratory of Quantum Sensing and Precision MeasurementNorth University of ChinaTaiyuan 030051People’s Republic of China High‑Frequency High‑Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029People’s Republic of China School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China School of Integrated Circuits University of Chinese Academy of SciencesBeijing 100049People’s Republic of China IMECAS-HKUST-Joint Laboratory of Microelectronics Beijing 100029People’s Republic of China

Due to the constraints imposed by physical effects and performance degra certain limitations in sustaining the advancement of Moore’s ***-dimensional(2D)materials have emerged as highly promising candidates for the post-Moore era,offering significant potential in domains such as integrated circuits and next-generation ***,in this review,the progress of 2D semiconductors in process engineering and various electronic applications are summarized.A careful introduction of material synthesis,transistor engineering focused on device configuration,dielectric engineering,contact engineering,and material integration are given *** 2D transistors for certain electronic applications including digital and analog circuits,heterogeneous integration chips,and sensing circuits are ***,several promising applications(artificial intelligence chips and quantum chips)based on specific mechanism devices are ***,the challenges for 2D materials encountered in achieving circuit-level or system-level applications are analyzed,and potential development pathways or roadmaps are further speculated and outlooked.

关键词： Two-dimensional materials Roadmap Integrated circuits Post-Moore era

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A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

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Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

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A FAS approach for stabilization of generalized chained forms: part 2. Continuous control laws

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Science China(Information Sciences) 2024年第3期67卷 114-135页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology

In this paper, continuous time-varying stabilizing controllers for the type of general nonholonomic systems proposed and treated in part 1 are designed using the fully actuated system(FAS) approach. The key step is to differentiate the first scalar equation, and by control of the obtained second-order scalar system, a proportional plus integral feedback form for the first control variable is obtained. With the solution to this designed second-order scalar system, the rest equations in the nonholonomic system form an independent time-varying subsystem which is then handled by the FAS approach. The overall designed controller contains an almost arbitrarily chosen design parameter, and is proven to guarantee the uniformly and globally exponential stability of the closed-loop system. The proposed approach is simple and effective,and is demonstrated with a practical example of ship control.

关键词： nonholonomic systems feedback stabilization fully actuated systems Lyapunov stability continuous controllers

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