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A self-centering and stiffness-controlled MEMS accelerometer

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Microsystems & Nanoengineering 2024年第1期10卷 27-40页

作者： Yiming Jin Zhipeng Ma Ziyi Ye Mingkang li xudong Zheng Zhonghe Jin School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310013China Key Laboratory of Micro/Nano-Satellite Research of Zhejiang Province Hangzhou 310007PR China

This paper presents a high-performance MEMS accelerometer with a DC/AC electrostatic stiffness tuning capability based on double-sided parallel plates(DSPPs).DC and AC electrostatic tuning enable the adjustment of the effective stiffness and the calibration of the geometric offset of the proof mass,respectively.A dynamical model of the proposed accelerometer was developed considering both DC/AC electrostatic tuning and the temperature *** on the dynamical model,a self-centering closed loop is proposed for pulling the reference position of the forceto-rebalance(FTR)to the geometric center of *** self-centering accelerometer operates at the optimal reference position by eliminating the temperature drift of the readout circuit and nulling the net electrostatic tuning *** stiffness closed-loop is also incorporated to prevent the pull-in instability of the tuned low-stiffness accelerometer under a dramatic temperature ***-time adjustments of the reference position and the DC tuning voltage are utilized to compensate for the residue temperature drift of the proposed *** a result,a novel controlling approach composed of a self-centering closed loop,stiffness-closed loop,and temperature drift compensation is achieved for the accelerometer,realizing a temperature drift coefficient(TDC)of approximately 7μg/℃ and an Allan bias instability of less than 1μg.

关键词： stiffness electrostatic centering

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大数据背景下烟草生产控制专业平台设计

微型电脑应用 2024年第6期40卷 223-225,237页

作者：李旭东金鑫郭非胡华胡武韩英军四川中烟工业有限责任公司成都卷烟厂四川成都610051

在大数据的基础上,利用网络技术、共享技术以及数据采集技术,构建一个集数据共享和采集功能一体的烟草生产控制专业平台,提高烟草制丝线过程的控制水平。传统人工抄录信息的方式被数据采集模块所取代,网络通信替代了纸质传递卡,实现高... 详细信息

在大数据的基础上,利用网络技术、共享技术以及数据采集技术,构建一个集数据共享和采集功能一体的烟草生产控制专业平台,提高烟草制丝线过程的控制水平。传统人工抄录信息的方式被数据采集模块所取代,网络通信替代了纸质传递卡,实现高效快速的信息传递,满足跨部门分享生产数据的需求。该平台使用OPC技术作为接口和协议,链接了不同厂商的各类系统与设备,同时使用实时数据库,打破生产现场通信的局限,实现了高效便捷的信息共享。

关键词：大数据生产控制烟草行业数据采集数据库

BrrTCP4b interacts with BrrTTG1 to suppress the development of trichomes in Brassica rapa var. rapa

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Plant Diversity 2024年第3期46卷 416-420页

作者： Cheng li li Zhang Hefan li Yuanwen Duan Xuemei Wen Yongping Yang xudong Sun The Germplasm Bank of Wild Species Yunnan Key Laboratory of Crop Wild Relatives OmicsInstitute of Tibetan Plateau Research at KunmingKunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences BeijingChina Tibet Plateau Institute of Biology Lhasa 850001TibetChina

The number of trichomes significantly increased in CRISPR/Cas9-edited BrrTCP4b turnip(Brassica rapa ***)***,the underlying molecular mechanism remains to be *** this study,we performed the Y2H screen using BrrTCP4b as the bait,which unveiled an interaction between BrrTCP4b and BrrTTG1,a pivotal WD40-repeat protein transcription factor in the MYB-bHLH-WD40(MBW)*** physical interaction was further validated through bimolecular luciferase complementation and ***,it was found that the interaction between BrrTCP4b and BrrTTG1 could inhibit the activity of MBW complex,resulting in decreased expression of BrrGL2,a positive regulator of trichomes *** contrast,AtTCP4 is known to regulate trichomes development by interacting with AtGL3 in Arabidopsis ***,this study revealed that BrrTCP4b is involved in trichome development by interacting with BrrTTG1 in turnip,indicating a divergence from the mechanisms observed in model plant *** findings contribute to our understanding of the regulatory mechanisms governing trichome development in the non-model plants turnip.

关键词： TCP transcription factor MBW complex Trichome development Turnip

圆叶葡萄和欧亚种葡萄叶片提取物对葡萄霜霉病的防治作用

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中国南方果树 2024年第3期53卷 185-191页

作者：郭泽西韦淑梅李旭东刘露露潘凤英孙大运尹玲黄羽曲俊杰广西壮族自治区农业科学院广西作物遗传改良生物技术重点开放实验室南宁530007 广西壮族自治区农业科学院葡萄与葡萄酒研究所南宁530007

为了明确不同抗性葡萄的叶片提取物对葡萄霜霉病的防治作用,以对葡萄霜霉病免疫的圆叶葡萄品种Noble及感病的欧亚种葡萄品种赤霞珠的幼叶和成龄叶乙醇提取物(叶片经干燥、粉碎后,以95%乙醇进行超声提取)为试材,设置不同浓度梯度,检测其... 详细信息

为了明确不同抗性葡萄的叶片提取物对葡萄霜霉病的防治作用,以对葡萄霜霉病免疫的圆叶葡萄品种Noble及感病的欧亚种葡萄品种赤霞珠的幼叶和成龄叶乙醇提取物(叶片经干燥、粉碎后,以95%乙醇进行超声提取)为试材,设置不同浓度梯度,检测其对葡萄霜霉病菌(Plasmopara viticola,葡萄生单轴霉)孢子囊和游动孢子萌发的影响,同时测定其对霜霉病的室内防治作用。结果表明,两种抗性葡萄的叶提取物对葡萄霜霉病菌孢子囊和游动孢子的萌发均具有抑制作用。1 mg/mL叶片提取物处理下孢子囊萌发率即显著低于对照(无菌水和5%乙醇),而且叶片提取物浓度从10 mg/mL增加到50 mg/mL时孢子囊萌发率显著下降。在10 mg/mL叶片提取物处理下游动孢子萌发率即显著低于对照。两种抗性葡萄幼叶和成龄叶提取物浓度为10、25和50 mg/mL时,仅10 mg/mL“赤霞珠”成龄叶提取物对葡萄霜霉病的室内防治效果为95.0%,其余处理均为100.0%。“Noble”和“赤霞珠”叶提取物具有抑制霜霉病菌孢子囊和游动孢子萌发的作用,其室内防治效果显著。

关键词：葡萄霜霉病叶片提取物圆叶葡萄欧亚种葡萄预防

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基于多种群协同粒子群人工智能算法的电力系统负荷调度研究

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自动化与仪器仪表 2024年第4期 139-143页

作者：刘雁行徐恺乔如妤梁楠陈宇李旭东内蒙古电力(集团)有限责任公司内蒙古电力营销服务与运营管理分公司呼和浩特010010 内蒙古电力(集团)有限责任公司呼和浩特010010

高效的电力系统负荷调度已成为解决电力供需平衡的新途径,对降低企业成本意义重大。通过对蒙西地区电力情况的分析,确定低污染排放与低成本发电两个调度目标,构建电力负荷调度模型。同时引入一种多种群协同粒子群模型求解电力负荷调度模... 详细信息

高效的电力系统负荷调度已成为解决电力供需平衡的新途径,对降低企业成本意义重大。通过对蒙西地区电力情况的分析,确定低污染排放与低成本发电两个调度目标,构建电力负荷调度模型。同时引入一种多种群协同粒子群模型求解电力负荷调度模型,采用协同策略分种群处理多个目标问题,避免模型陷入局部最优。在前沿性比较中,所提出的模型相比多目标进化与多目标粒子群性能提升18.65%与12.65%。在电力系统调度测试中,所提出的模型最优发电成本为30.4133×10^(4)元,最优污染排放量为1.8592×10^(4)1 b。在发电成本与污染排放上相比另外两种模型具有明显优势。由此可见,所提出的技术应用效果更好,研究技术为电网的调度优化与节能减排提供技术参考。

关键词：电力调度蒙西调度模型粒子群

Design of high-temperature superconductors at moderate pressures by alloying AlH3 or GaH3

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Matter and Radiation at Extremes 2024年第1期9卷 94-103页

作者： Xiaowei liang xudong Wei Eva Zurek Aitor Bergara Peifang li Guoying Gao Yongjun Tian Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Henan University of TechnologyZhengzhou 450001China Department of Chemistry State University of New York at BuffaloBuffaloNew York 14260-3000USA Physics Department and EHU Quantum Center University of the Basque CountryUPV/EHU48080 BilbaoSpain Donostia International Physics Center(DIPC) 20018 DonostiaSpain Centro de Física de Materiales CFM Centro Mixto CSIC-UPV/EHU20018 DonostiaSpain Extreme Conditions Physics Research Team College of Physics and Electronic InformationInner Mongolia Minzu UniversityTongliao 028043China

Since the discovery of hydride superconductors,a significant challenge has been to reduce the pressure required for their *** this context,we propose that alloying could be an effective strategy to achieve *** focus on a series of alloyed hydrides with the AMH_(6)composition,which can be made via alloying A15 AH_(3)(A=Al or Ga)with M(M=a group IIIB or IVB metal),and study their behavior under *** of them are predicted to maintain the A15-type structure,similar to AH_(3)under pressure,providing a platform for studying the effects of alloying on the stability and superconductivity of AH_(3).Among these,the A15-type phases of AlZrH_(6)and AlHfH_(6)are found to be thermodynamically stable in the pressure ranges of 40–150 and 30–181 GPa,***,they remain dynamically stable at even lower pressures,as low as 13 GPa for AlZrH_(6)and 6 GPa for AlHfH_(6).These pressures are significantly lower than that required for stabilizing A15 ***,the introduction of Zr or Hf increases the electronic density of states at the Fermi level compared with *** enhancement leads to higher critical temperatures(Tc)of 75 and 76 K for AlZrH_(6)and AlHfH_(6)at 20 and 10 GPa,*** the case of GaMH_(6)alloys,where M represents Sc,Ti,Zr,or Hf,these metals reinforce the stability of the A15-type structure and reduce the lowest thermodynamically stable pressure for GaH_(3) from 160 GPa to 116,95,80,and 85 GPa,*** noteworthy are the A15-type GaMH_(6)alloys,which remain dynamically stable at low pressures of 97,28,5,and 6 GPa,simultaneously exhibiting high Tc of 88,39,70,and 49 K at 100,35,10,and 10 GPa,***,these findings enrich the family of A15-type superconductors and provide insights for the future exploration of high-temperature hydride superconductors that can be stabilized at lower pressures.

关键词： alloying alloys superconductors

Identifying the Optimal Age for Herpes Zoster Vaccination—Yichang City,Hubei Province,China,2017–2019

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China CDC weekly 2022年第29期4卷 631-634页

作者： Meiying You Tianqi Wang Miaomiao Wang Wei Jiang Jing Jiang xudong li Yuehua Hu Dapeng Yin Office of Epidemiology Chinese Center for Disease Control and PreventionBeijingChina Data resources and Statistics Department Beijing Municipal Health Big Data and Policy Research CenterBeijingChina Yichang Center for Disease Control and Prevention Yichang CityHubei ProvinceChina Hainan Center for Disease Control and Prevention Haikou CityHainan ProvinceChina.

Summary What is already known about this topic?Herpes zoster(shingles)is a common skin condition in older adults,which usually presents as a painful rash with *** is the most effective method to prevent ***,there is not sufficient population-based epidemiological data in China to optimize the timing of zoster *** is added by this report?Clustering analyses of population-wide epidemiological data from the Healthcare Big Data Platform in Yichang,China showed that the average annual zoster incidence is the highest among people 55 years or older,at 10 cases per thousand persons per year,making this age group the optimal target population for *** was lower but increased with age among younger adults,28–54 years *** are the implications for public health practice?With limited vaccination resources,zoster vaccinations should be targeted at adults 55 years or older who are at the greatest risk for *** should be conducted to understand the risk of shingles among young and middle-aged adults and identify triggers of shingles:potentially leading to preventive measures.

关键词： younger zoster vaccination

甲苯二异氰酸酯对大鼠肺脏氧化应激损伤影响研究

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公共卫生与预防医学 2024年第1期35卷 34-38页

作者：刘保峰李旭东秦汝男唐慧晶曾强天津市疾病预防控制中心职业健康研究所天津300011

目的观察亚慢性吸入染毒甲苯二异氰酸酯(toluene diisocyanate,TDI)对大鼠肺脏组织的氧化应激损伤影响。方法无特定病原体级健康SD雄性大鼠随机分组,对照组大鼠予新鲜空气,低、中和高剂量组大鼠以动式染毒的方式暴露于TDI环境。观察大... 详细信息

目的观察亚慢性吸入染毒甲苯二异氰酸酯(toluene diisocyanate,TDI)对大鼠肺脏组织的氧化应激损伤影响。方法无特定病原体级健康SD雄性大鼠随机分组,对照组大鼠予新鲜空气,低、中和高剂量组大鼠以动式染毒的方式暴露于TDI环境。观察大鼠肺脏组织的超微结构和组织病理学改变;采用化学比色法检测肺脏组织中丙二醛(MDA)、还原型谷胱甘肽(GSH)、谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)和过氧化氢酶(CAT)水平;采用Real-time PCR检测法检测HO-1 mRNA相对表达水平,蛋白质免疫印迹法检测HO-1蛋白表达水平。结果各剂量组大鼠体质量、肺组织质量和肺脏脏器系数均低于对照组(P0.05)。结论亚慢性TDI染毒可导致大鼠肺脏组织的病理结构和超微结构发生改变,导致肺功能代谢酶水平的异常,从而诱导肺脏发生氧化应激损伤;但HO-1在肺脏氧化应激损伤中无明显变化。

关键词： TDI 肺脏氧化应激

a-Si/c-Si heterojunction solar cells on SiSiC ceramic substrates

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Rare Metals 2006年第Z1期25卷 186-189页

作者： li xudong XU Ying CHE Xiaoqi Beijing Solar Energy Research Institute Beijing 100083 China Beijing Solar Energy Research Institute Beijing 100083 China Beijing Solar Energy Research Institute Beijing 100083 China

Silicon thin-film solar cells are considered to be one of the most promising cells in the future for their potential advantages, such as low cost, high efficiency, great stability, simple processing, and none-pollution. In this paper, latest progress on poly-crystalline silicon solar cells on ceramic substrates achieved by our group was reported. Rapid thermal chemical vapor deposition (RTCVD) was used to deposited poly-crystalline silicon thin films, and the grains of as-grown film were enlarged by Zone-melting Recrystallization (ZMR). As a great change in cell′s structure, traditional diffused pn homojunction was replaced by a-Si/c-Si heterojunction, which lead is to distinct improvement in cell′s efficiency. A conversion efficiency of 3.42% has been achieved on 1 cm2 a-Si/c-Si heterojunction solar cell (Isc=16.93 mA, Voc=310.9 mV, FF=0.6493, AM=1.5 G, 24 ℃), while the cell with diffused homojunction only got an efficiency of 0.6%. It indicates that a-Si emitter formed at low temperature might be more suitable for thin film cell on ceramics.

关键词： a-Si/c-Si heterojunction thin film solar cell ceramic substrate