Design and Implementation of Library Information Management System Based on RFID Technology

随着社会的不断进步和科学技术的快速发展，收集信息的渠道逐渐拓宽，各种文献资料的种类和数量不断的增加，以信息技术和科学技术为主导的理念，正在不断地深入人们的生活，成为人类社会改革与发展的重要方向。图书馆作为对大量文献信息进行存储、管理和传播的机构，传统的图书馆已经无法满足人们的需求，自动化的管理模式在信息化的影响下进入到了改革时期，使得数字图书馆成为现代社会新型的图书馆产物。新型的图书馆将RFID技术应用在图书馆管理领域，相对于传统图书馆，新型的图书馆在条码技术和磁条安全机制上有着更大程度上的革新，为提高图书馆的服务质量和管理效率，将管理工作科学化、规范化，加速图书馆管理自动化进程做出了巨大的贡...With the rapid development of social progress and science and technology, gradually widening channels of collecting information, increasing types and numbers of documents, the idea led by information technology and science and technology, is continuously stepping into people's life, becoming an important direction for the reform and development of the human society. Library, as the institution...学位：工程硕士院系专业：软件学院软件工程系_工程硕士(软件工程)学号：X201223108

球床式高温气冷堆物理热工计算程序<bold>NECP-Panda</bold>中子学计算模块研制

为了进一步提高球床式高温气冷堆堆芯物理计算精度，西安交通大学核工程计算物理（Nuclear Engineering Computational Physics，NECP）实验室自主研发了适用于球床式高温气冷堆物理热工计算程序NECP-Panda的中子学计算模块。本文介绍了NECP-Panda的计算框架，重点阐述了中子学计算部分的理论方法，并进行了验证计算。计算问题包括简化混合球床堆算例以及高温气冷堆核电示范工程（High Temperature Reactor Pebble-bed Module，HTR-PM）的净堆装料和吸收体价值计算。数值结果表明：NECP-Panda对简化混合球床堆的keff计算与蒙特卡罗连续能量结果符合良好，计算的HTR-PM临界装料高度与蒙特卡罗连续能量结果高度一致，吸收体价值非常吻合，证明了NECP-Panda针对球床式高温气冷堆的中子学计算具有良好的计算能力和精度，为后续模块的开发奠定了坚实基础

基于肝表面智能自动对位法的超声-CT/MR融合成像的可行性研究

【目的】探讨基于肝表面智能自动对位法的超声-CT/MR融合成像在肝脏局灶性病变定位的可行性及简便性。【方法】采用飞利浦EPIQ7的PercuNav融合成像系统对30例增强CT或MR发现肝内局灶性病变的患者进行超声-CT/MR融合成像检查。同时采用系统配置的基于肝表面智能自动对位法（智能法）和常规内定标人工对位法（人工法）进行融合成像配准，比较两种方法的配准成功率、初步配准误差、微调配准次数。【结果】所有30例患者中，智能法和人工法的配准成功率均为96.67%（29/30），且初步配准误差和微调配准次数两种方法之间比较无统计学差异（P>0.05）。进一步分层分析，左肝病例中，人工法的初步配准误差优于智能法，差异有统计学意义（P=0.00），而微调配准次数虽然人工法少于智能法，但两者比较差异无统计学意义（P=0.09）；而在右肝病例中，智能法的初步配准误差和微调配准次数均优于人工法，差异有统计学意义（P<0.05）。【结论】基于肝表面智能自动对位法的超声-CT/MR融合成像技术具有较高的配准成功率，可行性较好；相对于常规的内定标人工对位法，对于右肝病灶其融合成像操作过程更为简便高效，有助于降低对操作者融合成像技术经验的依赖性

了不起的体育运动

奥运圣火已经点燃,全世界的优秀运动员正展开激然的角逐。在银屏前跟着欢呼呐喊的同时,也请你和我们一起探讨关于运动的话题。我们为什么要让孩子运动?运动可以给孩子带来什么?冠军教练如何看待冠军的培养?运动给优秀运动员们带来的人生改变是什么?儿童的体能训练都有哪些误区?幼儿园的冰雪运动课是如何开展的?</p

CMIP5模式对中国西北干旱区模拟能力评价/Evaluation of CMIP5 modes's simulation ability in the northwest arid areas of China[J]

气候模式是研究气候系统和气候变化的重要工具,气候模式结果是进行气候预测和气候变化风险评估的重要依据.基于中国西北干旱区78个气象站点1960-2005年的观测数据,对最新公布的CMIP5的39个模式在中国西北干旱区1960-2005年平均气温、降水的模拟能力进行评估.结果表明:多个模式模拟年平均气温与观测值的相关系数达到0.39,夏、秋季节的相关系数好于春、冬季,年平均气温模拟大多偏低2℃以上,其中MIROC4h、CCSM4和CMCC-CM对年平均气温的模拟绝对误差较小.模拟的年、季降水量与观测值的相关系数很差,均不到0.1.年降水量模拟普遍偏高100 mm以上,其中CMCC-CM、CNRM-CM5和MRI-CGCM3对年降水量模拟绝对误差较小.年际变化趋势上,模拟的平均气温升高趋势和降水量增加趋势均比观测趋势要低,模拟的冬季平均气温升高趋势偏低最明显,达-0.21℃/10 a,模拟夏季的降水量增加趋势偏低最明显,相对误差达-99％.CMIP5模式对中国西北干旱区的模拟效果整体上偏差较大,未来无论从物理过程还是模式算法都需要进一步研究和改进

Measurement of separate electron and positron spectra from 10 to 20 GeV with the geomagnetic field on DAMPE*

The cosmic-ray (CR) electrons and positrons in space are of considerable significance for studying the origin and propagation of CRs. The satellite-borne detector Dark Matter Particle Explorer (DAMPE) has been used to measure the separate electron and positron spectra, as well as the positron fraction. In this study, the Earth's magnetic field is used to distinguish CR electrons and positrons, as the DAMPE detector does not carry an onboard magnet. The energy for the measurements ranges from 10 to 20 GeV, which is currently limited at high energy by the zenith-pointing orientation of DAMPE. The results are consistent with previous measurements based on the magnetic spectrometer by AMS-02 and PAMELA, whereas the results of Fermi-LAT appear to be systematically shifted to larger values

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel