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Optimisation of mobile intelligent terminal data pre-processing methods for crowd sensing

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CAAI Transactions on Intelligence Technology 2018年第2期3卷 101-113页

作者： Min Huang Yuefan Zeng lina chen Bo Sun School of Software Engineering South China University of Technology Guangzhou People's Republic of China Research Institute of International Services Outsourcing Guangdong University of Foreign Studies Guangzhou People's Republic of China

Sensor data pre-processing is an essential phase of crowd sensing application. Existing studies do not effectively solve the problem, and there still exist various sensor data pre-processing optimisation problems at the acquisition end in crowd-sensing process. This study presents an improved sliding average method to achieve data compression and reduce the time complexity by using a dynamic window with improved processing time. Through adopting locally sorting and gradient change of the filter window, an improved extremum median filtering method is proposed to relieve the time- consuming problem when denoising high pixel images. A transmission strategy for optimisation is also proposed, in which only the demarcation points of each group of data and the data points with large differences when comparing with the demarcation points are recorded. This strategy reduces the storage pressure and the amount of data transmission of mobile terminal and improves the efficiency of data transmission. The experimental results show that their methods have higher speed and lower cost, and thus they can run better in crowd-sensing environment.

关键词：传感器数据预处理智能技术发展现状

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自旋类脑神经形态计算

四川师范大学学报（自然科学版） 2025年第2期48卷 176-191页

作者：张帅陈丽娜刘荣华南京大学物理学院江苏省纳米技术重点实验室江苏南京210023 南京邮电大学理学院江苏南京210023

类脑计算旨在模拟和实现大脑的信息处理和学习能力,以解决复杂的计算问题,其关键思想之一是模拟生物神经元和突触行为来实现信息传输、处理和存储.自旋电子学器件的非易失性、高速低功耗、几乎无限的耐用性及固有非线性等特点,使其在类... 详细信息

类脑计算旨在模拟和实现大脑的信息处理和学习能力,以解决复杂的计算问题,其关键思想之一是模拟生物神经元和突触行为来实现信息传输、处理和存储.自旋电子学器件的非易失性、高速低功耗、几乎无限的耐用性及固有非线性等特点,使其在类脑计算上已有广泛尝试和出色表现.基于对自旋电子学中的各类磁电阻效应、自旋转移力矩和自旋轨道力矩效应、电压调控磁各向异性效应以及磁化动力学的非线性效应进行介绍和总结,以各类自旋器件在储备池计算、伊辛机、脉冲神经网络以及真随机数生成器上的应用为实例,展望自旋类脑神经形态计算硬件在未来人工智能芯片领域的发展前景与趋势.

关键词：自旋电子学神经网络神经形态计算类脑人工智能芯片

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Potassium pre-inserted K1.04Mn8O16 as cathode materials for aqueous Li-ion and Na-ion hybrid capacitors

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Journal of Energy Chemistry 2020年第7期29卷 53-61,I0002页

作者： Yamin Zhang lina chen Chongyang Hao Xiaowen Zheng Yixuan Guo Long chen Kangrong Lai Yinghe Zhang Lijie Ci Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Department of Physics Changji UniversityChangji 831100Xinjiang Uygur Autonomous RegionChina LEO group Co. Ltd.Shanghai 200000China

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors,potassium ions are pre-inserted into MnO2 tunnel structure,the as-prepared K1.04Mn8 O16 materials consist of nanoparticles and nanorods were prepared by facile high-temperature solid-state *** as-prepared materials were well studied and they show outstanding electrochemical *** assembled hybrid supercapacitors with commercial activated carbon(YEC-8 A)as anode and K1.04Mn8 O16 as *** shows high energy and power ***-ion capacitors reach a high energy density of 127.61 Wh kg-1 at the power density of 99.86 W kg-1 and Na-ion capacitor obtains 170.96 Wh kg-1 at 133.79 W *** addition,the hybrid supercapacitors demonstrate excellent cycling performance which maintain 97%capacitance retention for Li-ion capacitor and 85%for Na-ion capacitor after 10,000 cycles.

关键词： K1.04Mn8O16 Pre-inserted Li-ion hybrid capacitors Na-ion hybrid capacitors Electrochemical behavior

Effect of Fe_(2)O_(3)on the Structure,Physical Properties and Crystallization of CaO-Al_(2)O_(3)-SiO_(2)Glass

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 954-961页

作者：张峰 XIONG Dehua 谢俊张继红 HAN Jianjun chen Dequan WEN Zhongquan FAN Zhenhua chen lina SUN Tengfei State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Hepu Research Center for Silicate Materials Industry Technology Beihai 536100China Hainan Institute of Wuhan University of Technology Sanya 430079China Shenzhen Research Institute of Wuhan University of Technology Shenzhen 518000China Chongqing Polycomp Inter-national Corporation Chongqing 400400China

The calcium aluminosilicate-based glasses(CaO-Al_(2)O_(3)-SiO_(2),CAS)with different Fe_(2)O_(3)content(0.10wt%,0.50wt%,0.90wt%,and 1.30wt%)were prepared by traditional melt-quenching *** glass network structure,thermal and mechanical properties,and crystallization behavior changes were investigated by nuclear magnetic resonance spectrometer,Fourier-transform infrared spectro-photometer,X-ray diffractometer,differential scanning calorimetry and field emission scanning electron microscope *** change of Q^(n)in glass structures reveals the glass network connectivity decreases due to the increasing content of Fe_(2)O_(3)addition,resulting in the increasing of non-bridging number in glass *** glass densities slightly rise from 2.644 to 2.681 g/cm^(3),while Vickers’s hardness increases at first,from 6.469 to 6.901 GPa,then slightly drops to 6.745 GPa,with Fe_(2)O_(3)content *** is almost no thermal expansion coefficient change from different Fe_(2)O_(3)*** glass transmittance in visible range gradually decreases with higher Fe_(2)O_(3)content,resulting from the strong absorption of Fe^(2+)and Fe^(3+)*** calculated activation energy from thermal analysis results first decreases from 282.70 to 231.18 kJ/mol,and then increases to 244.02 kJ/mol,with the Fe_(2)O_(3)content increasing from 0.10wt%to 1.30wt%.Meanwhile,the maximum Avrami constant of 2.33 means the CAS glasses exhibit two-dimensional *** of the CAS glass-ceramics samples contain main crystal phase of anorthite,the microstructure appears lamellar and columnar crystals.

关键词： calcium aluminosilicate glass network structure physical properties crystallization

Recent progress on excitation and manipulation of spin-waves in spin Hall nano-oscillators

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Chinese Physics B 2020年第11期29卷 117-130页

作者： Liyuan Li lina chen Ronghua Liu Youwei Du National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China New Energy Technology Engineering Laboratory of Jiangsu Provence&School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China

Spin Hall nano oscillator(SHNO),a new type spintronic nano-device,can electrically excite and control spin waves in both nanoscale magnetic metals and insulators with low damping by the spin current due to spin Hall effect and interfacial Rashba *** spin-wave modes have been excited successfully and investigated substantially in SHNOs based on dozens of different ferromagnetic/nonmagnetic(FM/NM)bilayer systems(e.g.,FM=Py,[Co/Ni],Fe,CoFeB,Y3Fe5O12;NM=Pt,Ta,W).Here,we will review recent progress about spin-wave excitation and experimental parameters dependent dynamics in *** nanogap SHNOs with in-plane magnetization exhibit a nonlinear self-localized bullet soliton localized at the center of the gap between the electrodes and a secondary high-frequency mode which coexists with the primary bullet mode at higher *** in the nanogap SHNOs with out of plane magnetization,besides both nonlinear bullet soliton and propagating spin-wave mode are achieved and controlled by varying the external magnetic field and current,the magnetic bubble skyrmion mode also can be excited at a low in-plane magnetic *** spin-wave modes show thermal-induced mode hopping behavior at high temperature due to the coupling between the modes mediated by thermal magnon mediated ***,thanks to the perpendicular magnetic anisotropy induced effective field,the single coherent mode also can be achieved without applying an external magnetic *** strong nonlinear effect of spin waves makes SHNOs easy to achieve synchronization with external microwave signals or mutual synchronization between multiple oscillators which improve the coherence and power of oscillation modes *** waves in SHNOs with an external free magnetic layer have a wide range of applications from as a nanoscale signal source of low power consumption magnonic devices to spin-based neuromorphic computing systems in the field of artificial intelligence.

关键词： spin–orbit torque spin Hall nano-oscillator spin-waves synchronization

Conservative management of multi-trauma induced peritonitis:Experience,outcomes,and indications

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World Journal of Clinical Cases 2023年第25期11卷 5897-5902页

作者： Qi chen Tao Zhu Jia-Kang Liu Jun Ding lina chen Department of Surgery Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Laboratory Medicine and Pathobiology University of TorontoToronto M5S 1A8OntarioCanada

BACKGROUND The concept of mandatory laparotomy in treating traumatic peritonitis has been increasingly questioned *** To summarize and share the experience of conservative treatment of patients with multi-trauma induced *** A retrospective review was performed on patients with multiple injury induced traumatic *** A total of 184 patients with multiple injury induced traumatic peritonitis were reviewed.46 of them underwent conservative *** of the 46 patients with conservative treatment switched to surgical treatment,and all of them were cured and discharged after successful conservative *** significant abnormal findings were observed at regular follow-up after *** Conservative management is safe,effective,feasible,and beneficial in hemodynamically stable patients with traumatic peritonitis if there is no definite evidence of severe abdominal visceral organ injury.

关键词： Trauma Peritonitis Damage control Conservative treatment

Guest ions pre-intercalation strategy of manganese-oxides for supercapacitor and battery applications

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Journal of Energy Chemistry 2021年第9期30卷 480-493页

作者： lina chen Chongyang Hao Yamin Zhang Youri Wei Linna Dai Jun cheng Hongqiang Zhang Lijie Ci State Key Lab of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina

Optimization of intrinsic structure of electrode materials plays decisive roles in promoting the development of energy storage systems to meet the fast-growing requirements in the *** engineering has been proved to be an effective way to obtain adequate active sites,preferable ion diffusion channels and stable structure,thus enhance the performance of *** in-depth understanding of the correlation among synthesis,structure and performance will significantly promote the development of excellent materials and energy storage ***,in this review,recent advances in regards to cation preintercalation engineering in Mn-based electrode materials for rechargeable metal ion batteries are systematically *** guest cations can expand interlayer space to promote ion diffusion kinetics,serve as pillars to stabilize structure,control composition and valence to switch electrochemical behavior,thus improve the overall performance of secondary ***,the existing challenges and perspectives are provided for the interlayer engineering and its promotion to battery industry.

关键词： Interlayer engineering Electrode materials Energy storage devices

Temperature-and field angular-dependent helical spin period characterized by magnetic dynamics in a chiral helimagnet MnNb_(3)S_(6)

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Science China(Physics,Mechanics & Astronomy) 2023年第1期66卷 171-177页

作者： Liyuan Li Haotian Li Kaiyuan Zhou Yaoyu Gu Qingwei Fu lina chen Lei Zhang Ronghua Liu National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China New Energy Technology Engineering Laboratory of Jiangsu Province&School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

The chiral magnets with topological spin textures provide a rare platform to explore topology and magnetism for potential application ***,we study the magnetic dynamics of several spin configurations on the monoaxial chiral magnetic crystal MnNb_(3)S_(6)via broadband ferromagnetic resonance(FMR)technique at cryogenic *** the high-field forced ferromagnetic state(FFM)regime,the obtained frequency f *** field H_(res) dispersion curve follows the wellknown Kittel formula for a single FFM,while in the low-field chiral magnetic soliton lattice(CSL)regime,the dependence of H_(res) on magnetic field angle can be well-described by our modified Kittel formula including the mixture of a helical spin segment and the FFM ***,compared with the sophisticated Lorentz micrograph technique,the observed magnetic dynamics corresponding to different spin configurations allow us to obtain temperature-and field-dependent proportion of helical spin texture and helical spin period ratio L(H)/L(0)via our modified Kittel *** results demonstrated that fieldand temperature-dependent nontrivial magnetic structures and corresponding distinct spin dynamics in chiral magnets can be an alternative and efficient approach to uncovering and controlling nontrivial topological magnetic dynamics.

关键词： chiral helimagnets magnetic solitons ferromagnetic resonance phase diagram

Differentiation potential of bone marrow mesenchymal stem cells in duck

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Journal of Genetics and Genomics 2009年第3期36卷 133-140页

作者： Linfeng Li Xiujuan Bai Xuelian Gong Hongkun Liu lina chen Weijun Guan Yuehui Ma Institute of Animal Science Chinese Academy of Agricultural Science Beijing 100193 China College of Animal Science and Technology Northeast Agricultural University Harbin 150000 China

The bone marrow mesenchymal stem cells （MSCs） are multipotent stem cells which can differentiate into mesenchymal cells in vitro. In this study, MSCs in duck were isolated from bone marrow by density gradient centrifuge separation, purified and expanded in the me- dium. The primary MSCs were expanded for 11 passages. The different-passage MSCs were induced to differentiate into osteoblasts and neuron-like cells. Karyotype analysis indicated that MSCs kept diploid condition and the hereditary feature was stable. The different- passage MSCs expressed CD44, ICAM-1 and SSEA-4, but not CD34, CD45 and SSEA-1 when detected by immunofluorescence staining There was no significant difference among the positive rates of passages 2, 6 and 8 （P 〉 0.05）, but a significant difference existed among those of passages 2, 6, 8 and 11 （P 〈 0.05）. After the osteogenic inducement was added, the induced different-passage MSCs expressed high-level alkaline phosphatase （ALP）, and are positive for tetracycline staining, Alizarin Red staining and Von Kossa staining. After the neural inducement was added, about 70% cells exhibited typical neuron-like phenotype, the induced different-passage MSCs expressed Nestin, neuron-specific enolase （NSE） and glial fibrillary acidic protein （GFAP） when detected by immunofluorescence staining. There was no significant difference among the positive rates of passages 3, 4 and 6 （P〉0.05）, but a significant difference existed among those of passages 3, 4, 6 and 8 （P〈0.05）. These results suggest that MSCs in duck were capable of differentiating into osteoblasts and neuron-like cells in vitro.

关键词： duck mesenchymal stem cells induction differentiation