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Analysis of thickness-shear and thickness-twist modes of AT-cut quartz acoustic wave resonator and filter

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Applied Mathematics and Mechanics(English Edition) 2015年第12期36卷 1527-1538页

作者： zinan zhao Zhenghua QIAN Bin WANG Jiashi YANG State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Department of Mechanical and Materials Engineering University of Nebraska-Lincoln

The thickness-shear （TS） and thickness-twist （TT） vibrations of partially electroded AT-cut quartz plates for acoustic wave resonator and filter applications are theoretically studied. The plates have structural variations in one of the two in-plane directions of the plates only. The scalar differential equations derived by Tiersten and Smythe for electroded and unelectroded AT-cut quartz plates are used, resulting in free vibration resonant frequencies and mode shapes for both fundamental and overtone fam- ilies of modes. The trapped modes with vibrations, mainly confined in the electroded areas, are found to exist in both the resonator and the filter structures. The numerical results for the trapped modes are presented for different aspect ratios of electrodes and material properties, providing a reference to the design and optimization of quartz acous- tic wave resonators and filters.

关键词： quartz plate thickness-shear (TS) thickness-twist (TT) scalar equation,trapped mode

Size-dependent vibrations and waves in piezoelectric nanostructures:a literature review

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International Journal of Smart and Nano Materials 2022年第3期13卷 391-431页

作者： zinan zhao Jun Zhu Weiqiu Chen Nantong Taisheng Blue Island Offshore Co. LtdQidongJiangsuChina Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province&Department of Engineering Mechanics&Soft Matter Research Center Zhejiang UniversityHangzhouZhejiangChina Key Laboratory of CAD&CG Zhejiang UniversityHangzhouZhejiangChina Shenzhen Research Institute of Zhejiang University ShenzhenGuangdongP.R.China

With the development and applications of nano-electro-mechanical systems,academic interest in the mechanical behavior of piezo-electric structures at nanoscale is *** unconven-tional phenomena have been observed either experimentally or through molecular dynamics *** most common and also important one is the size-dependent *** continuum mechanics with necessary modifications has been pro-ven to be very powerful in explaining these particular characteris-tics in a relatively simple theoretical *** article reviews the recent advances in understanding the size-dependent dynamic responses of piezoelectric nanostructures from the viewpoint of modified continuum *** attentions are paid to three advanced theories of piezoelectricity(*** piezoelec-tricity,surface piezoelectricity,and nonlocal piezoelectricity)and their abilities to predict unconventional vibration and wave char-acteristics in piezoelectric structures and devices at the *** article could serve as a useful reference for the future research on or design of nanostructures with multifield couplings.

关键词： Size effect vibration wave piezoelectric structure continuum mechanics

Nanomotor-based H_(2)S donor with mitochondrial targeting function for treatment of Parkinson’s disease

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Bioactive Materials 2024年第1期31卷 578-589页

作者： zinan zhao Lin Chen Chunhao Yang Wenyan Guo Yali Huang Wenjing Wang Mimi Wan Chun Mao Jian Shen National and Local Joint Engineering Research Center of Biomedical Functional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China

Reduction of endogenous hydrogen sulfide(H_(2)S)is considered to have an important impact on the progress of Parkinson’s disease(PD),thus exogenous H_(2)S supplementation is expected to become one of the key means to treat ***,at present,it is difficult for H_(2)S donors to effectively penetrate the blood brain barrier(BBB),selectively release H_(2)S in brain,and effectively target the mitochondria of neuron ***,we report a kind of nanomotor-based H_(2)S donor,which is obtained by free radical polymerization reaction between L-cysteine derivative modified-polyethylene glycol(PEG-Cys)and 2-methacryloyloxyethyl phosphorylcholine(MPC).This kind of H_(2)S donor can not only effectively break through BBB,but also be specifically catalyzed by cystathionineβ-synthase(CBS)in neurons of PD site in brain and 3-mercaptopyruvate sulfurtransferase(3-MST)in mitochondria to produce H_(2)S,endowing it with chemotaxis/motion ***,the unique chemotaxis effect of nanomotor can realize the purpose of precisely targeting brain and the mitochondria of damaged neuron cytopathic *** kind of nanomotor-based H_(2)S donor is expected to enrich the current types of H_(2)S donors and provide new ideas for the treatment of PD.

关键词： Hydrogen sulfide donor Mitochondrial targeting Parkinson’s disease Blood brain barrier

Optimal Batching Plan of Deoxidation Alloying based on Principal Component Analysis and Linear Programming

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Journal of Mechanical Engineering Research 2020年第2期3卷 11-16页

作者： zinan zhao Shijie Li Shuaikang Li Metal Materials Engineering Metallurgy and Energy College of North China University of Science and TechnologyTangshanHebei063210China

As the market competition of steel mills is severe,deoxidization alloying is an important link in the metallurgical *** solve this problem,principal component regression analysis is adopted to reduce the dimension of influencing factors,and a reasonable and reliable prediction model of element yield is *** on the constraint conditions such as target cost function constraint,yield constraint and non-negative constraint,linear programming is adopted to design the lowest cost batting scheme that meets the national standards and production *** research results provide a reliable optimization model for the deoxidization and alloying process of steel mills,which is of positive significance for improving the market competitiveness of steel mills,reducing waste discharge and protecting the environment.

关键词： Deoxidization alloying Principal component regression analysis Linear programming Optimization of dosing scheme

直接口服抗凝药预防骨科大手术后静脉血栓栓塞症疗效与安全性的系统评价

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中国循证医学杂志 2019年第10期19卷 1217-1225页

作者：赵紫楠孙雪林胡欣北京医院药学部国家老年医学中心药物临床风险与个体化应用评价北京市重点实验室

目的系统评价直接口服抗凝药(DOAC)预防骨科大手术(MOS)后静脉血栓栓塞症(VTE)的疗效与安全性。方法计算机检索The Cochrane Library、PubMed、EMbase、CNKI、WanFang Data和CBM数据库,搜集有关DOAC预防MOS后VTE疗效与安全性的随机对照... 详细信息

目的系统评价直接口服抗凝药(DOAC)预防骨科大手术(MOS)后静脉血栓栓塞症(VTE)的疗效与安全性。方法计算机检索The Cochrane Library、PubMed、EMbase、CNKI、WanFang Data和CBM数据库,搜集有关DOAC预防MOS后VTE疗效与安全性的随机对照试验(randomized controlled trial,RCT),检索时限均由建库至2019年3月。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险后,采用RevMan 5.3软件进行Meta分析。结果共纳入22个RCT,包括41 244例患者。Meta分析结果显示,利伐沙班[Peto OR=0.54,95%CI(0.35,0.82),P=0.004]和阿哌沙班[Peto OR=0.49,95%CI(0.26,0.92),P=0.03]更能预防MOS后症状性深静脉血栓(DVT)的发生率。利伐沙班MOS后症状性肺栓塞(PE)发生率小于低分子肝素[Peto OR=0.53,95%CI(0.29,0.96),P=0.04],但MOS后大出血事件发生率高于低分子肝素[Peto OR=1.98,95%CI(1.30,3.01),P=0.001]。结论当前证据表明,在预防MOS后症状性DVT的发生方面,利伐沙班和阿哌沙班均优于低分子肝素。虽然利伐沙班在预防MOS后症状性PE发生率方面优于低分子肝素,但其大出血风险更高。受纳入研究数量和质量的限制,上述结论尚待更多高质量研究予以验证。

关键词：直接口服抗凝药静脉血栓栓塞症骨科大手术 Meta分析系统评价随机对照试验

LLM-based Robot Task Planning with Exceptional Handling for General Purpose Service Robots

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民办应用型本科大学英语教师角色转换调查研究——基于学生视角

第43届中国控制会议

作者： Ruoyu Wang Zhipeng Yang zinan zhao Xinyan Tong Zhi Hong Kun Qian School of Automation Southeast University

The development of a general purpose service robot for daily life necessitates the robot's ability to deploy a myriad of fundamental behaviors judiciously. Recent advancements in training Large Language Models(LLMs) can be used to generate action sequences directly, given an instruction in natural language with no additional domain information. However, while the outputs of LLMs are semantically correct, the generated task plans may not accurately map to acceptable actions and might encompass various linguistic ambiguities. LLM hallucinations pose another challenge for robot task planning, which results in content that is inconsistent with real-world facts or user inputs. In this paper, we propose a task planning method based on a constrained LLM prompt scheme, which can generate an executable action sequence from a command. An exceptional handling module is further proposed to deal with LLM hallucinations problem. This module can ensure the LLM-generated results are admissible in the current environment. We evaluate our method on the commands generated by the RoboCup@Home Command Generator, observing that the robot demonstrates exceptional performance in both comprehending instructions and executing tasks.

关键词： Task Planning General Purpose Service Robots Large Language Model

来源： cnki会议评论

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黄河科技大学学报 2018年第6期20卷 13-18页

作者：赵子楠黄河科技学院应用技术学院河南济源454650

应用型本科大学英语课堂中教师的角色是影响大学英语课堂的重要因素,对大学英语教师角色的调查和分析对应用型本科大学英语教学效果起着至关重要的作用。然而,当前民办应用型本科大学英语教师所扮演的课堂角色与学生对教师的角色期待有... 详细信息

应用型本科大学英语课堂中教师的角色是影响大学英语课堂的重要因素,对大学英语教师角色的调查和分析对应用型本科大学英语教学效果起着至关重要的作用。然而,当前民办应用型本科大学英语教师所扮演的课堂角色与学生对教师的角色期待有着明显的差异。形成差异的因素主要包括教师的教育观念、专业素质、对学生期待的了解程度等。教师只有不断改变传统教学观念,提升自身专业化水平,在教学过程中关注学生情感因素,培养学生学习策略,才能减少教师实际教学行为与学生期待之间的差距,从而更好地促进英语教学。

关键词：民办应用型本科大学英语教师角色课堂教学行为学生期待

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光动力疗法治疗肛管尖锐湿疣的研究进展

中国基层医药 2022年第10期29卷 1597-1600页

作者：赵梓楠高慧扬州大学临床医学院皮肤科扬州225000

尖锐湿疣是由人乳头瘤病毒感染引起的性传播疾病。近些年肛管尖锐湿疣的发病率逐年上升,严重影响患者的身心健康。临床上治疗尖锐湿疣方法较多,但暂无可以彻底根除的方法。5-氨基酮戊酸光动力疗法(ALA-PDT)是利用光敏剂和光治疗尖锐湿... 详细信息

尖锐湿疣是由人乳头瘤病毒感染引起的性传播疾病。近些年肛管尖锐湿疣的发病率逐年上升,严重影响患者的身心健康。临床上治疗尖锐湿疣方法较多,但暂无可以彻底根除的方法。5-氨基酮戊酸光动力疗法(ALA-PDT)是利用光敏剂和光治疗尖锐湿疣的新的治疗方法,逐渐被广泛应用。笔者对ALA-PDT的作用机制、ALA-PDT治疗肛管尖锐湿疣的临床研究进行综述。

关键词：尖锐湿疣肛管光动力疗法

口腔种植修复治疗牙列缺损患者的咀嚼功能及其并发症分析

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首都食品与医药 2023年第3期30卷 56-58页

作者：赵紫楠天津市河西区河西口腔医院天津300203

目的分析研讨口腔种植修复治疗牙列缺损患者的咀嚼功能及其并发症的影响效果.方法选择天津市河西区河西口腔医院2020年11月-2021年11月收治的牙列缺损患者104例作为研究对象,将其随机分成对照组(52例)以及治疗组(52例),对照组实施常规... 详细信息

目的分析研讨口腔种植修复治疗牙列缺损患者的咀嚼功能及其并发症的影响效果.方法选择天津市河西区河西口腔医院2020年11月-2021年11月收治的牙列缺损患者104例作为研究对象,将其随机分成对照组(52例)以及治疗组(52例),对照组实施常规修复治疗,治疗组实施口腔种植修复治疗.比较两组治疗后的咀嚼功能及其并发症发生情况.结果经一段时间的治疗,治疗组患者的咀嚼功能及其并发症发生情况均在一定程度上优于对照组,其差异均有统计学意义(P<0.05).结论口腔种植修复治疗对牙列缺损患者具有积极的疗效,能够有效改善咀嚼功能,预防并发症的发生,值得在临床上广泛应用.

关键词：口腔种植修复牙列缺损咀嚼功能并发症