检索结果-南通市图书馆

Protective effects of carnosine on white matter damage induced by chronic cerebral hypoperfusion

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2016年第9期11卷 1438-1444页

作者： Jing Ma Shu-hong Bo xiao-tong lu A-jing Xu Jian Zhang Department of Pharmacy Xinhua HospitalShanghai Jiao Tong University School of Medicine

Carnosine is a dipeptide that scavenges free radicals, inhibits infammation in the central nervous system, and protects against ischemic and hypoxic brain damage through its anti-oxidative and anti-apoptotic actions. Therefore, we hypothesized that carnosine would also protect against white matter damage caused by subcortical ischemic injury. White matter damage was induced by right unilateral common carotid artery occlusion in mice. The animals were treated with 200, 500 or 750 mg/kg carnosine by intraperitoneal injection 30 minutes before injury and every other day after injury. Then, 37 days later, Klfiver-Barrera staining, toluidine blue staining and immunofluorescence stain- ing were performed. Carnosine （200, 500 mg/kg） substantially reduced damage to the white matter in the corpus callosum, internal capsule and optic tract, and it rescued expression of myelin basic protein, and alleviated the loss of oligodendrocytes. However, carnosine at the higher dose of 750 mg/kg did not have the same effects as the 200 and 500 mg/kg doses. These findings show that carnosine, at a particular dose range, protects against white matter damage caused by chronic cerebral ischemia in mice, likely by reducing oligodendroglial cell loss.

关键词： nerve regeneration subcortical ischemic vascular dementia carnosine corpus callosum neuron internal capsule oligodendrocyte optic tract white matter damage neural regeneration

Momentum-space crystal in narrow-line cooling of ^(87)Sr

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第1期28卷 360-366页

作者： Jian-Xin Han Ben-Quan lu Mo-Juan Yin Ye-Bing Wang Qin-Fang Xu xiao-tong lu Hong Chang Key Laboratory of Time and Frequency Primary Standards National Time Service Center Chinese Academy of Sciences University of Chinese Academy of Sciences

The discovery of the momentum space crystal based on the alkaline-earth atom ^(88)Sr in narrow-line cooling has paved the way to explore this novel physical phenomenon in other cold atom systems. In this paper, a momentum space crystal based on the fermions ^(87)Sr in narrow-line cooling of transition^1S_0–~3P_1 is demonstrated. We theoretically analyze and compare the formation principle of the narrow-line with that of broad-line cooling, and achieve the momentum space crystal in experiment. Beyond that we present a series of numerical calculations of those important parameters which influence the distribution and size of the momentum space crystal. Correspondingly, we vary the values of these parameters in experiment to observe the momentum space crystal evolution and distribution. The experimental results are in conformity with the results of the theoretically numerical calculations. These results and analyses provide a detailed supplementary study on the formation and evolution of momentum space crystal. In addition, this work could also give a guideline on atomic manipulation by narrow-line cooling.

关键词： momentum space crystal narrow-line cooling strontium

Efficient Visual Recognition:A Survey on Recent Advances and Brain-inspired Methodologies

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2022年第5期19卷 366-411页

作者： Yang Wu Ding-Heng Wang xiao-tong lu Fan Yang Man Yao Wei-Sheng Dong Jian-Bo Shi Guo-Qi Li Applied Research Center Laboratory Tencent Platform and Content Group Shenzhen 518057China School of Automation Science and Engineering Faculty of Electronic and Information EngineeringXi′an Jiaotong UniversityXian710049China School of Artificial Intelligence Xidian UniversityXi'an 710071China Division of Information Science Nara Institute of Science and TechnologyNara 6300192Japan Peng Cheng Laboratory Shenzhen 518000China Department of Computer and Information Science University of PennsylvaniaPhiladelphia PA19104-6389USA Institute of Automation Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

Visual recognition is currently one of the most important and active research areas in computer vision,pattern recognition,and even the general field of artificial *** has great fundamental importance and strong industrial needs,particularly the modern deep neural networks(DNNs)and some brain-inspired methodologies,have largely boosted the recognition performance on many concrete tasks,with the help of large amounts of training data and new powerful computation *** recognition accuracy is usually the first concern for new progresses,efficiency is actually rather important and sometimes critical for both academic research and industrial ***,insightful views on the opportunities and challenges of efficiency are also highly required for the entire *** general surveys on the efficiency issue have been done from various perspectives,as far as we are aware,scarcely any of them focused on visual recognition systematically,and thus it is unclear which progresses are applicable to it and what else should be *** this survey,we present the review of recent advances with our suggestions on the new possible directions towards improving the efficiency of DNN-related and brain-inspired visual recognition approaches,including efficient network compression and dynamic brain-inspired *** investigate not only from the model but also from the data point of view(which is not the case in existing surveys)and focus on four typical data types(images,video,points,and events).This survey attempts to provide a systematic summary via a comprehensive survey that can serve as a valuable reference and inspire both researchers and practitioners working on visual recognition problems.

关键词： Visual recognition deep neural networks(DNNS) brain-inspired methodologies network compression dynamic inference survey

Design of the front-end electronics for parallel plate ion chamber

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2021年第4期5卷 558-563页

作者： Peng Huang Zhi-Guo Yin Xue-Er Mu Yang Wang xiao-tong lu Tian-Jue Zhang Beijing China

Background A set of nozzle systems for proton therapy is now being developed at China Institute of Atomic *** real-ize the measurement of beam dose,a set of charge measurement electronics is designed,which is used to measure the output charge signal of the ionization chamber integration ***,the charge measurement device can be used to measure the position information of ion chamber strips just by changing certain *** The device realizes the integration and amplification of charge by IVC102,a precise low-noise integrator,and the DSP controls the ADC to collect and process the *** communication protocol is used to realize communication with the host computer which makes it possible to read data and set the *** A fixed charge generator is designed to generate 20 pC to 2 nC charge,which is used to test the measuring accuracy of *** results have shown that the accuracy is within 0.62%in the above charge *** After experimental tests,the front-end electronics meet the design goal and play a certain pre-test and verification role in the dose and beam position monitoring in the proton therapy system.

关键词： Proton therapy Ionization chamber Dose monitoring Charge measurement

A transportable optical lattice clock at the National Time Service Center

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第7期29卷 92-98页

作者： De-Huan Kong Zhi-Hui Wang Feng Guo Qiang Zhang xiao-tong lu Ye-Bing Wang Hong Chang CAS Key Laboratory of Time and Frequency Primary Standards National Time Service CenterXi’an 710600China School of Astronomy and Space Science University of Chinese Academy of Sciences(CAS)Beijing 100049China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China

We report a transportable one-dimensional optical lattice clock based on 87Sr at the National Time Service *** transportable apparatus consists of a compact vacuum system and compact optical *** vacuum system with a size of 90 cm×20 cm×42 cm and the beam distributors are assembled on a double-layer optical *** modularized optical subsystems are integrated on independent optical *** using a 230 ms clock laser pulse,spin-polarized spectroscopy with a linewidth of 4.8 Hz is obtained which is close to the 3.9 Hz Fourier-limit *** time interleaved self-comparison frequency instability is determined to be 6.3 × 10^-17 at an averaging time of 2000 s.

关键词： optical lattice clock strontium atoms spin-polarized spectra instability

Rabi Spectroscopy and Sensitivity of a Floquet Engineered Optical Lattice Clock

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2021年第7期38卷 29-33页

作者： Mo-Juan Yin Tao Wang xiao-tong lu Ting Li Ye-Bing Wang Xue-Feng Zhang Wei-Dong Li Augusto Smerzi Hong Chang Key Laboratory of Time and Frequency Primary Standards National Time Service CenterChinese Academy of SciencesXi'an 710600China Department of Physics and Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China Department of Physics and Institute of Theoretical Physics Shanxi UniversityTaiyuan 030006China QSTAR INO-CNRand LENSLargo Enrico Fermi 2I-50125 FirenzeItaly School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

We periodically modulate the lattice trapping potential of a ^(87)Sr optical clock to Floquet engineer the clock *** the context of atomic gases in lattices,Floquet engineering has been used to shape the dispersion and topology of Bloch quasi-energy *** from these previous works manipulating the external(spatial)quasi-energies,we target the internal atomic degrees of *** shape Floquet spin quasi-energies and measure their resonance profiles with Rabi *** provide the spectroscopic sensitivity of each band by measuring the Fisher information and show that this is not depleted by the Floquet dynamical *** demonstration that the internal degrees of freedom can be selectively engineered by manipulating the external degrees of freedom inaugurates a novel device with potential applications in metrology,sensing and quantum simulations.

关键词： spectroscopy transition quasi

在线全文

学校读者我要写书评

暂无评论

车联网环境下信号交叉口车速控制策略

交通运输系统工程与信息 2018年第1期18卷 50-58,95页

作者：鹿应荣许晓彤丁川鲁光泉北京航空航天大学交通科学与工程学院车路协同与安全控制北京市重点实验室北京100191

为了减轻城市道路上信号交叉口对交通流的阻断,针对车联网环境下个体车辆可以与路侧设施及交叉口中心控制系统实时信息交互的特征,提出了信号交叉口车速控制策略,在提高交叉口通行效率的基础上兼顾驾驶舒适性与环境友好性.为验证车速控... 详细信息

为了减轻城市道路上信号交叉口对交通流的阻断,针对车联网环境下个体车辆可以与路侧设施及交叉口中心控制系统实时信息交互的特征,提出了信号交叉口车速控制策略,在提高交叉口通行效率的基础上兼顾驾驶舒适性与环境友好性.为验证车速控制模型的有效性,基于多智能体技术建立了车联网环境下信号交叉口车速控制仿真系统,以典型十字交叉口为例,模拟对比分析了传统驾驶和车联网2种环境下车辆通过交叉口的行程时间、燃料消耗与污染物排放.结果表明,该速度控制策略下车辆通过交叉口的平均行程时间减少了约60%,燃料消耗减少了约40%,污染物的排放也有显著减少.

关键词：智能交通车速控制多智能体信号交叉口车联网

在线全文

学校读者我要写书评

暂无评论

电力线网络技术在路灯节能控制中的应用

电力系统装备 2021年第24期 23-24页

作者：肖同录齐春晓济南市城市照明服务中心山东济南250000

根据我国传统道路交通高峰期设置的道路照明标准,午夜时间则照明亮度较高,为节约更多的能源,就需要在午夜时段关掉部分路灯,减少道路照明时间。随着信息技术迅速发展,以Mega48和PL2110为核心组成的电力线网络技术被应用于路灯节电管理,... 详细信息

根据我国传统道路交通高峰期设置的道路照明标准,午夜时间则照明亮度较高,为节约更多的能源,就需要在午夜时段关掉部分路灯,减少道路照明时间。随着信息技术迅速发展,以Mega48和PL2110为核心组成的电力线网络技术被应用于路灯节电管理,通过在午夜关闭部分路灯,实现节电目的。基于此,在综述路灯节能控制应用背景的基础上,描述了电力线网络技术应用于路灯节能控制领域的设计理念,并对产生的效果展开分析。

关键词：电力线网络路灯节能控制

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

整体护理工作中改善护士心理素质的几点对策

中国医学伦理学 2008年第2期21卷 90-91页

作者：陈芳佟晓露新疆医科大学新疆乌鲁木齐830054

整体护理工作随着社会生活水平的提高和患者要求的不断提升,已经成为一项复杂而具有创造性的工作,因此给护理人员带来了巨大的心理压力。良好的心理素质是构建和谐护患关系的关键因素之一,更是整体护理工作对护士的必然要求。因此帮助... 详细信息

整体护理工作随着社会生活水平的提高和患者要求的不断提升,已经成为一项复杂而具有创造性的工作,因此给护理人员带来了巨大的心理压力。良好的心理素质是构建和谐护患关系的关键因素之一,更是整体护理工作对护士的必然要求。因此帮助护士减轻和消除压力,提高护士的适应能力,是医院管理者应该考虑的问题。

关键词：护士心理素质改善建议