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A WiFi Fingerprint Based High-Adaptability Indoor Localization via Machine Learning

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China Communications 2020年第7期17卷 247-259页

作者： Jianzhe Xue Junyu liu min Sheng yan Shi Jiandong Li School of Telecommunication Engineering Xidian UniversityXi’an 710071China State Key Laboratory of Integrated Service Networks Xidian UniversityXi’an 710071China

For received signal strength(RSS)fingerprint based indoor localization approaches,the localization accuracy is significantly influenced by the RSS variance,device heterogeneity and environment *** this work,we present a high-adaptability indoor localization(HAIL)approach,which leverages the advantages of both relative RSS values and absolute RSS values to achieve robustness and ***,a backpropagation neural network(BPNN)is devised in HAIL to measure the fingerprints similarities based on absolute RSS *** this aid,the characteristics of the applied area could be specially learned such that HAIL could be adaptive to different *** experiments demonstrate that HAIL achieves high localization accuracy with the average localization error of 0.87 m in the typical ***,HAIL has the minimum amount of large errors and decreases the average localization error by about 30%~50%compared with the existing approaches.

关键词： WiFi absolute error

Uncertainty evaluation and correlation analysis of single-particle energies in phenomenological nuclear mean field:an investigation into propagating uncertainties for independent model parameters

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Nuclear Science and Techniques 2021年第2期32卷 45-57页

作者： Zhen-Zhen Zhang Hua-Lei Wang Hai-yan Meng min-Liang liu School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

Based on the Monte Carlo approach and conventional error analysis theory,taking the heaviest doubly magic nucleus 208Pb as an example,we first evaluate the propagated uncertainties of universal potential parameters for three typical types of single-particle energy in the phenomenological Woods–Saxon mean *** the Woods–Saxon modeling with uncorrelated model parameters,we found that the standard deviations of singleparticle energy obtained through the Monte Carlo simulation and the error propagation rules are in good *** seems that the energy uncertainty of the single-particle levels regularly evoluate with certain quantum numbers to a large extent for the given parameter ***,the correlation properties of the single-particle levels within the domain of input parameter uncertainties are statistically analyzed,for example,with the aid of Pearson’s correlation *** was found that a positive,negative,or unrelated relationship may appear between two selected single-particle levels,which will be extremely helpful for evaluating the theoretical uncertainty related to the single-particle levels(e.g.,K isomer)in nuclear structural calculations.

关键词： Uncertainty propagation Correlation effect Woods-Saxon potential

Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： LI Jian ZHOU Gao-Liang yan Zheng-Xin liu Wei WANG Zhao-Qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators

Synthesis and gelation behaviors of five new dimeric cholesteryl derivatives

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Science China Chemistry 2011年第3期54卷 475-482页

作者： liu KaiQiang PENG JunXia XUE min yan Ni liu Jing FANG Yu Key Laboratory of Applied Surface and Colloid Chemistry(Shaanxi Normal University) Ministry of EducationSchool of Chemistry and Materials ScienceShaanxi Normal UniversityXi’an 710062China

Five new diacid amides of di-cholesteryl L-glycinates were designed and *** compounds with linkers containing 0,1, 2,3,or 4 methylene units are denoted as 1,2,3,4,and 5,*** gelation behaviors in 25 solvents were tested as novel low-molecular-mass organic gelators(LMOGs).It was shown that the length of the linker connecting the two-cholesteryl residues in a gelator plays a crucial role in the gelation behavior of the compound.1 gels 11 of the 25 solvents tested at a concentration lower than 1.0%,while 2 gels 17 of the solvents tested.4 and 5,however,gel only 2 and 4 of them,respectively. SEM observation reveals that the lengths of the linkers and the identity of the solvents are the main factors affecting the structures of the aggregates in the ***,a clear linker effect on the microstructures of the gels was *** example,the aggregates of 1,2 and 3 in benzene or 1-heptanol adopt structures of thin fibers,rods or lamellas,respectively. Furthermore,it was found that the gelation and aggregation behaviors of 2,3,4,and 5 in DMSO showed an even-odd effect.

关键词： organogelators cholesterol linker effect solvent effect

单倍体相合骨髓移植白血病患者造血重建的临床研究

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中国实验血液学杂志 2003年第4期11卷 416-419页

作者：王恒湘纪树荃陈惠仁闫洪敏刘静朱玲薛梅空军总医院血液科北京100036

为研究未去除T细胞的单倍体骨髓移植后造血重建的特点 ,对 15例HLA 2 - 3个位点不匹配骨髓移植亲属供者使用G CSF 3- 4 μg/ (kg·d) ,连续 7天后采髓。预处理方案采用大剂量阿糖胞苷联合环磷酰胺和全身照射。应用环孢菌素A和氨甲喋呤... 详细信息

为研究未去除T细胞的单倍体骨髓移植后造血重建的特点 ,对 15例HLA 2 - 3个位点不匹配骨髓移植亲属供者使用G CSF 3- 4 μg/ (kg·d) ,连续 7天后采髓。预处理方案采用大剂量阿糖胞苷联合环磷酰胺和全身照射。应用环孢菌素A和氨甲喋呤、抗胸腺细胞球蛋白及霉酚酸酯 (MMF)预防移植物抗宿主病。移植后观察血像、骨髓像、行染色体分析及HLA位点鉴定。移植后分别于 3,6和 12个月及 2年追踪鉴定植入状态。结果发现 ,15例患者全部移植物植入 ,移植后中性粒细胞 >0 .5× 10 9/L和血小板 >2 0× 10 9/L的时间分别为 18(13- 2 3)天及 2 2 (16- 32 )天。骨髓像显示各系造血均恢复。 7例应用染色体检查 ,8例应用HLA位点 ,4例应用血型 ,1例应用DNA指纹检测 ,植入鉴定结果除 1例复发患者于移植后 2个月骨髓复发植入鉴定为供、受者嵌合外 ,其他患者均呈持续全部稳定植入。移植后发生I度急性GVHD 8例 ,II-IV度GVHD 5例 ,可评价的慢性GVHD共 8例。结论 :供者应用G CSF后采髓 ,加大预处理剂量 ,联合应用作用机理不同的多种免疫抑制剂进行HLA单倍体的骨髓移植 ,可跨越人类HLA多样性屏障。

关键词：骨髓移植单倍体相合骨髓移植白血病造血重建

基于园林卓越人才培养的观赏植物组织培养课程实践改革

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高师理科学刊 2017年第9期37卷 104-106,110页

作者：梁艳刘敏朱琨周璐陈阳金一锋齐齐哈尔大学生命科学与农林学院黑龙江齐齐哈尔161006

以园林专业卓越人才培养为目标,提出教学过程以应用与创新为导向,更新教学内容体系,探索引入项目式教学形式,调整考核方法.改革后的课程体系侧重学生实践动手能力与创新能力的培养,学生的学习主动性显著提高,在学生中反馈效果好,教学效... 详细信息

以园林专业卓越人才培养为目标,提出教学过程以应用与创新为导向,更新教学内容体系,探索引入项目式教学形式,调整考核方法.改革后的课程体系侧重学生实践动手能力与创新能力的培养,学生的学习主动性显著提高,在学生中反馈效果好,教学效果显著.

关键词：观赏植物组织培养课程教学改革园林卓越人才培养

Thermally Conductive Polyimide/Boron Nitride Composite Films with Improved Interfacial Compatibility Based on Modified Fillers by Polyimide Brushes

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Chinese Journal of Polymer Science 2023年第12期41卷 1921-1936,I0009页

作者： Meng-yan Gao Lei Zhai Song Mo yan Jia Yi liu min-Hui He Lin Fan Key Laboratory of Science and Technology on High-tech Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

Polyimide-based composite films with high thermal conductivity,good mechanical property and electrical insulating performance are urgently needed in the electronics and microelectronics *** one of the key technical challenges to be solved,interfacial compatibility between filler and matrix plays an important role for composite ***,boron nitride was modified by grafting polyimide brushes via a twostep method,and a series of thermally conductive polyimide/boron nitride composite films were *** characterization and performance results proved that the interfacial interaction and compatibility was greatly enhanced,resulting in a significant reduction in defects and interfacial thermal *** interphase width of transition zone between two phases was also efficiently enlarged due to polyimide brushes grafted on filler *** a result,composite films based on polyimide-grafted boron nitride exhibited significantly improved properties compared with those based on pristine *** strength can reach up to 80 MPa even if the filler content is as high as 50 wt%.The out-of-plane and in-plane thermal conductivity of composite film increased to 0.841 and 0.850 W·m^(-1)·K^(-1),*** addition,thermal and dielectric properties of composite films were also enhanced to some *** above results indicate that surface modification by chemically grafting polymer brushes is an effective method to improve two-phase interfacial compatibility so as to prepare composite film with enhanced properties.

关键词： Polyimide Composite film Boron nitride Thermal conductivity Interfacial compatibility

Improvement of Ni Silicide Thermal Stability By Using Vanadium Elements

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Chinese Physics Letters 2013年第3期30卷 194-197页

作者： liu Hai-Long liu yan liu min WANG Tao A.Tuya Department of Radiology Zhejiang Province Tongde HospitalHangzhou 310012 Department of Radiology Second Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 312000 Department of Radiology The Second HospitalShaoxing 312000 College of Electrical Engineering Zhejiang UniversityHangzhou 310012 Department of Electronics Engineering Chungnam National University220 Gung-dongYuseong-guDaejeon 305-764Korea

Ni silicide thermal stability is improved by the use of a Ni-V(nickel vanadium)alloy *** relationship between the formation temperature and the thermal stability of Ni silicide is *** sheet resistance after the formation of Ni silicide with the Ni-V shows stable characteristics up to a rapid-thermal-process temperature of 700℃,while degradation of sheet resistance starts at that temperature in the case of ***,the thermal stability improvement is demonstrated by the post-silicidation *** is considered that the thermal robustness of Ni-V silicide is highly dependent on the formation *** the increasing silicidation temperature(around 700℃),more thermally stable Ni silicide is formed in comparison to the low-temperature case using the Ni-V.A Ni-V alloy target is utilized to form Ni *** V and the V-trap complexes are explained to block the transformation from NiSi to NiSi2 so as to improve the Ni silicide thermal stability.

关键词： alloy stability. resistance

Bromodimethylsulfonium bromide: A brominating reagent for the conversion of anthracene into 9,10-dibromoanthracene

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Chinese Chemical Letters 2014年第3期25卷 435-437页

作者： Xin Zhang Ju-yan liu Ying Wang min-min Yue Bin Yuan College of Chemistry Tianjin Key Laboratory of Structure and Performance for Functional MoleculeKey Laboratory of Inorganic-Organic Hybrid Functional Material ChemistryMinistry of EducationTianjin Normal University

Bromodimethylsulfonium bromide （BDMS） was used as an efficient brominating reagent for the synthesis of 9,10-dibromoanthracene in dichloromethane. The desired products were obtained in excellent yields.

关键词： Bromodimethylsulfonium bromideBrominating reagent9 10-Dibromoanthracene