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Epitaxial growth of ultrathin ZrO_2(111) films on Pt(111)

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Chinese Science Bulletin 2011年第6期56卷 502-507页

作者： GAO Yan ZHANG Liang PAN yonghe WANG GuoDong XU Yang ZHANG WenHua ZHU JunFa National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

Ordered epitaxial ZrO2 films were grown on Pt(111) and characterized by low energy electron diffraction (LEED), synchrotron radiation photoemission spectroscopy (SRPES) and X-ray photoelectron spectroscopy (XPS). The films were prepared by vapor deposition of zirconium in an O2 atmosphere followed by annealing under ultra high vacuum. At low coverages, the films grew as discontinuous two-dimentional islands with ordered structures. The size and structure of these islands were dependent on the coverage of ZrO2 films. At coverage he surface. As the coverage increased, the (19^(1/2) × 19^(1/2) ) R23.4° structure developed with increasing degree of long-range order, while the (5×5) structure gradually faded. When the coverage reached >6 ML, a continuous ZrO2(111) film was formed with a (1×1) surface LEED pattern coexisting with a (2×2) pattern. These ordered thin ZrO2 films provide good model surfaces of bulk ZrO2 and can be used for further fundamental studies of the surface chemistry of ZrO2 using modern surface science techniques.

关键词：二氧化锆薄膜薄膜外延生长同步辐射光电子能谱超薄有序结构表面图案低能电子衍射化学基础研究

Providing a Happy Life for Chinese People

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China Today 2019年第9期68卷 24-27页

作者： ZHANG yonghe the Human Rights Research Institute of Southwest University of Political Science and Law

ON June 25, 1945 the Charter of the United Nations was adopted at the United Nations Conference on International Organization. It articulated a commitment to uphold the human rights of citizens, outlined a broad set of principles relating to achieving “higher standards of living,” and expressed the determination to “employ international machinery for the promotion of the economic and social advancement of all peoples.”

关键词： Happy Life Chinese People

Parameter-dependent Lyapunov functional for systems with multiple time delays

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控制理论与应用（英文版） 2004年第3期2卷 239-245页

作者： MinWU yonghe SchoolofInformationScienceandEngineering CentralSouthUniversityChangshaHunan410083China SchoolofInformationScienceandEngineering CentralSouthUniversityChangshaHunan410083China／／SchoolofMathematicalScienceandComputingTechnologyCentralSouthUniversityChangshaHunan410083China

The separation of the Lyapunov matrices and system matrices plays an important role when one uses parameter-dependent Lyapunov functional handling systems with polytopic type uncertainties. The delay-dependent robust stability problem for systems with polytopic type uncertainties is discussed by using parameter-dependent Lyapunov functional. The derivative term in the derivative of Lyapunov functional is reserved and the free weighting matrices are employed to express the relationship between die terms in the system equation such that the Lyapunov matrices are not involved in any product terms with the system matrices. In addition, the relationships between the terms in the Leibniz Newton formula are also described by some free weighting matrices and some delay-dependent stability conditions are derived. Numerical examples demonstrate that the proposed criteria are more effective than the previous results.

关键词： Robust stability Delay-dependent Parameter-dependent Lyapunov functional Polytopic type uncertainties Linear matrix inequality

南堡凹陷4号构造带断裂活化及其对油气成藏的控制作用

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石油勘探与开发 2022年第4期49卷 716-727页

作者：刘露孙永河陈昌娄瑞王琦东北石油大学地球科学学院黑龙江大庆163318 重庆科技学院非常规油气开发研究院重庆401331 复杂油气田勘探开发重庆市重点实验室重庆401331 中国石油辽河油田公司辽宁盘锦124010

基于地震、钻井等资料,对南堡凹陷基底先存F4号走滑断裂(简称F4号断裂)活化成因机制及其对油气成藏的控制作用进行研究。综合运用断裂活动期次的厘定、断距回剥和物理模拟等技术手段,明确了F4号断裂在新生代再活动形成的南堡凹陷4号构... 详细信息

基于地震、钻井等资料,对南堡凹陷基底先存F4号走滑断裂(简称F4号断裂)活化成因机制及其对油气成藏的控制作用进行研究。综合运用断裂活动期次的厘定、断距回剥和物理模拟等技术手段,明确了F4号断裂在新生代再活动形成的南堡凹陷4号构造带由南向北传播生长,南部以走滑变形为主,北部以伸展变形为主;4号构造带与相邻2号、3号构造带内断裂属于不同断裂体系,是在统一应力场作用下通过“独立生长—相互接触—作用连接”最终交织在一起。通过构建先存断裂再活动变形机制判别图版,认为古近系沙河街组沉积期F4号断裂受走滑作用控制发生再活动,古近系东营组和新近系馆陶组—明化镇组沉积期该断裂受斜向伸展作用控制发生再活动。F4号断裂在新生代再活动对成藏的控制作用包括:①作为油源断裂控制油气垂向跨层运移。②形成走滑转换带控制砂体展布。③向上传播生长并与邻区相互作用控制两类圈闭的形成,有利于油气富集。

关键词：渤海湾盆地南堡凹陷新生代走滑断裂先存断裂断裂活化判别图版物理模拟实验油气成藏

On absolute stability of Lur'e control systems with multiple non-linearities using linear matrix inequalities

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控制理论与应用（英文版） 2004年第2期2卷 131-136页

作者： MinWU yonghe JinhuaShe SchoolofMathematicalScienceandComputingTechnology CentralSouthUniversityChangsbaHunan410083China DepartmentofMcchatronics TokyoUniversityofTechnologyTokyo192-0982Japan SchoolofInformationScienceandEngimeering CentralSouthUniversityChangshaHunan410083China

Necessary and suffcient conditions for the existence of a Lyapunov function in the Lur ’ e form to guarantee the absolute stability of Lur’ e control systems with multiple non-linearities are discussed in this paper. It simplifies the existence problem to one of solving a set of linear matrix inequalities (LMIs). If those LMIs are feasible, free parameters in the Lyapunov function, such as the positive definite matrix and the coefficients of the integral terms, are given by the solution of the LMIs. Otherwise, this Lyapunov function does not exist. Some sufficient conditions are also obtained for the robust absolute stability of uncertain systems. A numerical example is provided to demonstrate the effectiveness of the proposed method.

关键词： Lur’e control systems Absolute stability Robustness Lyapunov function Linear matrix inequality

基于图论诊断法与小波包变换的数控机床进给系统故障诊断研究

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振动与冲击 2022年第15期41卷 130-137,185页

作者：黄华薛文虎姚嘉靖王永和兰州理工大学机电工程学院兰州730050

在复杂机械系统未知故障诊断中,单一故障诊断方法诊断精度低、推理速度慢,不利于工程实际应用。针对这一问题,提出了基于小波包变换与图论诊断法的数控机床进给系统故障联合诊断方法。首先利用图论诊断法建立数控机床进给系统的故障模型... 详细信息

在复杂机械系统未知故障诊断中,单一故障诊断方法诊断精度低、推理速度慢,不利于工程实际应用。针对这一问题,提出了基于小波包变换与图论诊断法的数控机床进给系统故障联合诊断方法。首先利用图论诊断法建立数控机床进给系统的故障模型,并根据故障原因定位算法快速确定引起故障发生的可能原因,缩小诊断范围;然后对振动信号进行小波包变换,进一步精确定位故障原因,最终实现数控机床进给系统中未知故障的准确识别与诊断。试验证明,基于图论诊断法与小波包变换的故障联合诊断方法,弥补了图论诊断法故障冗余解多和诊断精度低的缺陷,实现了未知故障的快速筛选与精确定位,可以高效、准确的诊断数控机床进给系统中的未知故障。

关键词：进给系统故障诊断球杆仪监测法图论诊断法

人工智能向善:面向未成年人的人工智能应用监管探研——面向未成年人的人工智能技术规范研究(三)

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电化教育研究 2023年第8期44卷 33-41页

作者：倪琴贺樑王英英白庆春吴永和上海师范大学教育大数据与教育决策实验室上海200234 华东师范大学上海智能教育研究院上海200062 上海开放大学上海开放远程教育工程技术研究中心上海200433 华东师范大学教育信息技术学系上海200062

人工智能应用与未成年人之间的和谐共生是当前亟待完成的任务。由于未成年人正处于认知、心理塑造发展的关键时期,其成长发展过程中需要更多监管和关注。针对当前人工智能应用监管中存在的风险和挑战,文章从面向未成年人的人工智能应用... 详细信息

人工智能应用与未成年人之间的和谐共生是当前亟待完成的任务。由于未成年人正处于认知、心理塑造发展的关键时期,其成长发展过程中需要更多监管和关注。针对当前人工智能应用监管中存在的风险和挑战,文章从面向未成年人的人工智能应用监管框架顶层设计出发,提出面向未成年人的人工智能应用监管善治路径。监管框架顶层设计以尊重人类的自主能力为核心,提升未成年人的能动性,优化监督机制,具体包括监管内涵、技术原则和组成要素。监管善治路径从以未成年人为中心的人工智能应用监管技术体系的构建出发,探索提升场景多样化评测机制,完善面向未成年人的人工智能应用监管制度,参与面向未成年人的人工智能应用监管国际规则制定,开展面向未成年人的人工智能应用监管社会实验研究。通过研究框架和善治实施路径的构建,以期为面向未成年人的人工智能技术规范提供有益参考。

关键词：人工智能应用监管未成年人安全伦理

Bi-weekly docetaxel and 5-fluorouracil:an effective and feasible treatment for advanced gastric cancer with poor performance status

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Gastroenterology Report 2014年第4期2卷 295-299页

作者： Yuting Tan Wenyun Li yonghe Chen Yanhong Dengand Jian Xiao Department of Medical Oncology The Sixth Affiliated Hospital of Sun Yat-sen UniversityChina Centre for Quantitative Medicine Duke-NUS Graduate Medical SchoolNational University of SingaporeSingapore Department of Surgery The Sixth Affiliated Hospital of Sun Yat-sen UniversityChina

Background:The survival benefits from cytotoxic chemotherapy have been demonstrated in advanced gastric cancer(AGC).A large proportion of AGC patients initially present poor performance status(PS);however,most of the clinical evidence comes from trials on patients with good PS.A better-designed regimen is greatly needed for AGC patients with poor ***:To evaluate the efficacy and safety of a modified combination regimen with docetaxel plus 5-fluorouracil(5-FU)every two weeks as first-line treatment in AGC patients with poor ***:From September 2011 to December 2013,12 patients diagnosed with AGC with Eastern Cooperative Oncology Group(ECOG)PS scores of 3 or 4 were included in this *** the patients received docetaxel 60 mg/m^(2) on Day 1,5-FU 400mg/m^(2) intravenous(i.v.)bolus on Day 1,and a 46-hour continuous *** of 5-FU 2400mg/m^(2) every two weeks,until disease progressed or patients experienced unacceptable toxicity or declined *** clinical,pathologic and survival data were all ***:Eleven out of 12 patients were assessable for responses,whereas nine cases(75%)achieved partial response,one(8.3%)achieved stabilized disease,and one(8.3%)had progressive *** median progression-free survival was 6.5 months(95%CI:4.8–8.2).The median overall survival was 12.0 months(95%CI:9.0–15.0).The most common Grade 3/4 toxicities were anemia in seven patients(58.3%).No patient experienced febrile ***:The novel modification of bi-weekly docetaxel and 5-FU is a promising treatment option for AGC with poor PS,showing great efficacy and acceptable toxicity.

关键词： advanced gastric cancer docetaxel 5-fluorouracil poor performance status

社会角色理论视域下的人工智能时代教师:困厄、归因及澄明

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电化教育研究 2022年第6期43卷 18-24,60页

作者：郭胜男吴永和华东师范大学教育信息技术学系上海200062

智慧教育时代,AI技术“激荡”起来的教师角色冲突日趋激烈,教师陷于角色何以转变的混乱之中,严重阻碍教师角色扮演的进程,因此,教师个体如何扮演好教师角色成为AI时代亟须探究的命题。文章从社会角色理论视角,解析教师与学生、智能媒介... 详细信息

智慧教育时代,AI技术“激荡”起来的教师角色冲突日趋激烈,教师陷于角色何以转变的混乱之中,严重阻碍教师角色扮演的进程,因此,教师个体如何扮演好教师角色成为AI时代亟须探究的命题。文章从社会角色理论视角,解析教师与学生、智能媒介工具、信息资源以及同侪教师之间的关系及其产生的困境,并进一步从智能技术的叠加效应、信息资源的爆炸性增长及教育目标的革新等外部环境变量和教师角色差距明显、教师角色认知迷航及教师角色技能不足等角色内生机理反思其成因。文章提出教师摆脱困厄之境,需从立身之本、转变之姿和应守之义三个方面进行教师角色澄明,以期教师能够在“百舸争流”的人工智能时代保持角色的充盈和生命的张力,把握时代脉搏,寻得教师角色的“诗意栖居”,成为智能时代合格的教师。

关键词：人工智能教师角色社会角色理论角色扮演