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基于纳米定位的压电陶瓷驱动器二进制控制

压电与声光 2008年第3期30卷 294-296页

作者：孙树峰温州大学机电工程学院浙江温州325035

由于压电陶瓷驱动器(PZTA)具有体积小、位移输出精度高等优点,因而它在超精密定位和微机电系统(MEMS)中得到了广泛的应用,但其本身固有的非线性和迟滞等缺陷,降低了其位移输出精度。为了克服这些缺陷,采用开环二进制控制原理控制PZTA,... 详细信息

由于压电陶瓷驱动器(PZTA)具有体积小、位移输出精度高等优点,因而它在超精密定位和微机电系统(MEMS)中得到了广泛的应用,但其本身固有的非线性和迟滞等缺陷,降低了其位移输出精度。为了克服这些缺陷,采用开环二进制控制原理控制PZTA,不仅可以有效地克服其非线性和迟滞缺陷,使PZTA的位移输出精度达到±26.9 nm,而且无需反馈控制回路和检测元件,使控制系统结构简单,降低了成本,便于集成到MEMS中。

关键词：压电陶瓷驱动器二进制控制纳米定位

Influence of cryogenic permanent magnet undulator motion error on magnetic field error and radiation intensity loss

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Radiation Detection Technology and Methods 2018年第1期2卷 200-206页

作者： shu-Chen sun Wei-Fan Sheng Hui-Hua Lu Xiao-Yu Li shu-Tao Zhao Ling-Ling Gong Wan Chen Zhi-Qiang Li Lei Zhang Yu-Feng Yang Xiang-Zhen Zhang Ya-Jun sun Laboratory of Particle Acceleration Physics&Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China

A cryogenic permanent magnet undulator prototype designed for Chinese High Energy Photon Source Test Facility(HEPSTF)at Institute of High Energy Physics is constructed and now *** precision of girders is a significant parameter to guarantee gap error so as to avoid phase error and radiation intensity *** order to study and minimize girder parallelism errors,RADIA and SPECTRA are used to calculate qualified motion *** Modules and single motor closed-loop feedback are designed to compensate the *** field is finally tuned to reach *** of the study and analysis will be presented in this paper.

关键词： Motion precision test Cryogenic permanent magnet undulator Phase error Radiation intensity

Ultra-thin ALD CoO_(x)-ZnO heterogenous films as highly sensitive and environmentally friendly H_(2)S sensor

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Rare Metals 2023年第9期42卷 3054-3063页

作者： Qing-Min Hu Zhe Dong Gai-Xia Zhang Yu-Xi Li shuang-Feng Xing Zhi-Heng Ma Bo-Yu Dong Bo Lu shu-Hui sun Jia-Qiang Xu NEST Lab Department of ChemistryCollege of ScienceShanghai UniversityShanghai200444China Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications Varennes VarennesQCJ3X 1S2Canada State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan030001China

To obtain environmentally friendly,integrated and miniaturized gas sensors for the increasing request for the Internet of Things industry and other relative areas,the ultra-thin CoO_(x)/Zn O heterogeneous film with active interfacial sites was in-situ deposited on micro-electro-mechanical systems(MEMS)as H_(2)S *** layer deposition(ALD)was employed to in-situ fabricate the uniform Zn O thin *** CoO_(x)was deposited on ZnO surface to obtain CoO_(x)/Zn O heterojunction and active interfacial *** ultra-thin film(20 nm)with 50 ALD Co O_(x)decorated on 250 ALD Zn O displays excellent sensing performance,including very high response(4.45@200×10^(-9))and selectivity to H_(2)S with a limit of detection(LOD)of 0.38×10^(-9),long-term sensing stability,high response/recovery performance(7.5 s/15.7 s)and mechanical strength at 230。*** for the high sensing performance of CoO_(x)/Zn O have been confirmed by series of characterizations and density functional theory(DFT)*** film thickness with Debye length,the oxygen vacancies and the synergistic effect of active interfacial sites are main reasons for the high sensing *** strategy by fabrication of CoO_(x)/Zn O heterogeneous film within Debye length and employing synergistic effect of active interfacial sites offers a promising route for the design of environmentally friendly gas ***,the ALD technique offers a facile in-situ strategy and high-throughput fabrication of MEMS gas sensors.

关键词： Atomic layer deposition(ALD) Surface decoration CoO_(x)/ZnO active interfacial sites H_(2)S gas sensor

Research progress on the mechanism of exercise against depression

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World Journal of Psychiatry 2024年第11期14卷 1611-1617页

作者： Ya-Lin Zhao shu-Ya sun Hao-Cheng Qin Yu-Lian Zhu Zhi-Wen Luo Yuan Qian shuo Chen School of Integrated Traditional Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing 210006Jiangsu ProvinceChina Department of Sports Medicine Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing 210006Jiangsu ProvinceChina Department of Rehabilitation Medicine Huashan HospitalFudan UniversityShanghai 200433China Department of Sports Medicine Huashan HospitalFudan UniversityShanghai 200040China Department of Outpatient Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing 210006Jiangsu ProvinceChina

The substantial global health burden of depression encourages the development of innovative and broadly effective *** paper aimed to examine recent advancements by which exercise works as an antidepressant and recommends optimal types and quantity of exercise as supplemental therapies in treating *** behavior and low physical activity significantly influence the onset of *** an effective treatment option,exercise can significantly reduce depression *** exerts antidepressant effects as it modulates neurotransmitters,neuroplasticity,the immune system,and hormone *** exercise forms include yoga,strength training,and walking/*** exercise regimens that consider individual preferences and tolerability can improve *** exercise enhances general well-being and reduces depressive *** research is needed to understand the complex basis of exercise's effects on *** is a cost-effective and accessible intervention for depression management that needs additional ***,customized exercise programs,as per each patient’s needs,are essential for their successful implementation clinically.

关键词： Exercise Depression Dose-response relationship Glucocorticoid cortisol 5-hydroxy tryptamine Norepinephrine

Outcome of a session of extracorporeal shock wave lithotripsy before endoscopic retrograde cholangiopancreatography for problematic and large common bile duct stones

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World Journal of Gastroenterology 2017年第27期23卷 4950-4957页

作者： Tao Tao Ming Zhang Qi-Jie Zhang Liang Li Tao Li Xiao Zhu Ming-Dong Li Gui-Hua Li shu-Xia sun Department of Gastroenterology Zibo Central Hospital Department of Rehabilitation Zibo Central Hospital Department of General Surgery(Breast and Thyroid Surgery) Zibo Central Hospital Department of Orthopedics(Spinal Surgery) Zibo Central Hospital Guangdong Province Key Laboratory of Medical Molecular Diagnosis Guangdong Medical College Department of Gynecology Zibo Central Hospital

AIM To compare the efficacy of a session of extracorporeal shock wave lithotripsy(ESWL) before endoscopic retrograde cholangiopancreatography(ERCP) vs ERCP only for problematic and large common bile duct(CBD) *** Adult patients with CBD stones for whom initial ERCP was unsuccessful because of the large size of CBD stones were identified. The patients were randomized into two groups,an "ESWL + ERCP group" and an "ERCP-only" group. For ESWL + ERCP cases,ESWL was performed prior to ERCP. Clearance of the CBD,complications related to the ESWL/ERCP procedure,frequency of mechanical lithotripsy use and duration of the ERCP procedure were evaluated in both *** There was no significant difference in baseline characteristics between the two groups. A session of ESWL before ERCP compared with ERCP only resulted in similar outcomes in terms of successful stone removal within the first treatment session(74.2% vs 71.0%,P = 0.135),but a higher clearance rate within the second treatment session(84.4% vs 51.6%,P = 0.018) and total stone clearance(96.0% vs 86.0%,P = 0.029). Moreover,ESWL prior to ERCP not only reduced ERCP procedure time(43 ± 21 min vs 59 ± 28 min,P = 0.034) and the rate of mechanical lithotripsy use(20% vs 30%,P = 0.025),but also raised the clearance rate of extremely large stones(80.0% vs 40.0%,P = 0.016). Post-ERCP complications were similar for the two *** Based on the higher rate of successful stone removal and minimal complications,ESWL prior to ERCP appears to be a safe and effective treatment for the endoscopic removal of problematic and large CBD stones.

关键词： Extracorporeal shock wave lithotripsy Endoscopic retrograde cholangiopancreatography Common bile duct stones

美国“涉藏立法”的动因、效能与应对——基于法律与外交的视角

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中国藏学 2022年第5期 197-205,220页

作者：孙舒中国政法大学国际法学院北京100088

基于法律与外交的视角梳理和审视美国“涉藏立法”,发现不管是早期美国中央情报局煽动支持“西藏独立”,还是中美建交后美国国会通过“涉藏立法”继续操弄涉藏问题,都是美国对华遏制战略的一体两面。基于这一动因,美国追求“涉藏立法”... 详细信息

基于法律与外交的视角梳理和审视美国“涉藏立法”,发现不管是早期美国中央情报局煽动支持“西藏独立”,还是中美建交后美国国会通过“涉藏立法”继续操弄涉藏问题,都是美国对华遏制战略的一体两面。基于这一动因,美国追求“涉藏立法”的法律效力与外交效果最大化,企图“以藏遏华”。而实际上,新中国成立尤其是新时代以来,在党的治藏方略指引下,西藏地区取得全方位发展,也极大地打击了美西方支持下的涉藏分裂主义气焰。当前,中美关系持续恶化,美国必将继续以涉藏问题作为遏制我国发展的关键战略支点。基于此,我国应利用法律与外交内在互补特质,增加反制美国“涉藏立法”的法律与外交手段。量体裁衣地采用法律与外交相结合的模式,揭示美国“涉藏立法”行为及内容的非法性,解构其处心积虑并建构、操持的所谓涉藏问题话语体系。

关键词：美国 “涉藏立法” 法律与外交反制裁

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中国沉积学的今后发展:若干思考与建议

地学前缘 2005年第2期12卷 3-10页

作者：孙枢中国科学院地质与地球物理研究所北京100029

在简述沉积学国内外研究进展基础上, 文中提出了中国沉积学今后发展需要加强和重视的研究领域。就沉积类型而言,需要加强和重视包括陆相沉积、碳酸盐沉积、近岸和浅海硅质碎屑沉积、深海沉积的研究;新的发展方向包括沉积盆地、古气候与... 详细信息

在简述沉积学国内外研究进展基础上, 文中提出了中国沉积学今后发展需要加强和重视的研究领域。就沉积类型而言,需要加强和重视包括陆相沉积、碳酸盐沉积、近岸和浅海硅质碎屑沉积、深海沉积的研究;新的发展方向包括沉积盆地、古气候与沉积作用、前寒武纪沉积、人类生存环境沉积学、区域沉积学和全球沉积学。文中还对中国如何继续深化这些研究提出了一些需注意的问题,如需长期不懈地对一些科学问题和沉积现象深入研究和观测,以及重视新方法及新技术的应用等。在结语中对未来中国沉积学发展提出了10条建议。

关键词：中国沉积学沉积地质学地球系统战略发展

Magnetization and magnetic phase diagrams of a spin-1/2 ferrimagnetic diamond chain at low temperature

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Chinese Physics B 2021年第5期30卷 630-638页

作者： Tai-Min Cheng Mei-Lin Li Zhi-Rui Cheng Guo-Liang Yu shu-Sheng sun Chong-Yuan Ge Xin-Xin Zhang Department of Physics College of SciencesShenyang University of Chemical TechnologyShenyang 110142China School of Materials Science and Engineering Shenyang University of Chemical TechnologyShenyang 110142China School of Software Engineering Shenyang University of TechnologyShenyang 110870China

We used the Jordan-Wigner transform and the invariant eigenoperator method to study the magnetic phase diagram and the magnetization curve of the spin-1/2 alternating ferrimagnetic diamond chain in an external magnetic field at finite *** magnetization versus external magnetic field curve exhibits a 1/3 magnetization plateau at absolute zero and finite temperatures,and the width of the 1/3 magnetization plateau was modulated by tuning the temperature and the exchange *** critical magnetic field intensities H_(CB),H_(CE)and H_(CS) were obtained,in which the H_(CB) and H_(CE)correspond to the appearance and disappearance of the 1/3 magnetization plateau,respectively,and the higher H_(CS) correspond to the appearance of fully polarized magnetization plateau of the *** energies of elementary excitation hω_(σ,k)(σ=1,2,3)present the extrema of zero at the three critical magnetic fields at 0 K,i.e.,[hω_(3,k)(H_(CB)]_(min)=0,[hω_(2,k)(H_(CE)]_(max)=0 and[hω_(2,k)(H_(CS)]_(min)=0,and the magnetic phase diagram of magnetic field versus different exchange interactions at 0 K was established by the above *** to the relationships between the system’s magnetization curve at finite temperatures and the critical magnetic field intensities,the magnetic field-temperature phase diagram was *** was observed that if the magnetic phase diagram shows a three-phase critical point,which is intersected by the ferrimagnetic phase,the ferrimagnetic plateau phase,and the Luttinger liquid phase,the disappearance of the 1/3 magnetization plateau would inevitably ***,the 1/3 magnetization plateau would not disappear without the three-phase critical *** appearance of the 1/3 magnetization plateau in the low temperature region is the macroscopic manifestations of quantum effect.

关键词： invariant eigen-operator method Jordan-Wigner transformations critical magnetic field intensity magnetic phase diagrams

In vitro identification of metabolites of verapamil in rat liver microsomes

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Acta Pharmacologica Sinica 2004年第1期 123-130页

作者： Lu sun, shu-qiu ZHANG, Da-fang ZHONG Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, Shenyang 110016, China

AIM: To investigate the metabolism of verapamil at low concentrations in rat liver microsomes. METHODS: Liver microsomes of Wistar rats were prepared using ultracentrifuge method. The in vitro metabolism of verapamil was studied with the rat liver microsomal incubation at concentration of 1.0 μmol/L and 5.0 umol/L. The metabolites were separated and assayed by liquid chromatography-ion trap mass

关键词： verapamil in vitro metabolism liver microsomes high pressure liquid chromatography mass spectrometry