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DeepWMH:无需人工标注训练的脑白质高信号病灶分割工具

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Science Bulletin 2024年第7期69卷 872-875页

作者：刘成浩卓芝政曲丽莹金颖华田田徐俊谭桂荣李玉娜段云云王婷婷张在强张艳玲陈瑞余嫔男 Peixin zhang 施余露张建国田德才李润芝张星虎施福东王艳丽姜季委 Aaron Carass 刘亚欧叶初阳 School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China Department of Radiology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Beijing Key Laboratory of Neurostimulation Beijing 100070China China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalBeijing 100070China Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijing 100070China Department of Electrical and Computer Engineering Johns Hopkins UniversityBaltimore 21205USA

White matter hyperintensities(WMHs)on fluid-attenuated inversion recovery(FLAIR)images are imaging features in various neurological diseases and essential markers for clinical impairment and disease *** are associated with brain aging and pathological changes in the human brain,such as in Alzheimer’s disease(AD)[1],Parkinson’s disease(PD)[2],cerebral small vessel disease(SVD)[3],multiple sclerosis(MS)[4].

关键词： diseases clinical Alzheimer

Perovskite quantum laser with enhanced population inversion driven by plasmon-induced hot electron transfer under potential shift polarization conditions

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Photonics Research 2024年第5期12卷 986-994页

作者： YONG PAN LIJIE WU YUAN zhang YIHAO zhang JIE XU HAIXIA XIE jianguo CAO College of Science Xi'an University of Architecture and TechnologyXi'an 710055China

The hot electron transfer resulting in fluorescence enhancement is significantly meaningful for theory and experiment of the study on photoelectric ***,the laser emission based on direct hot electron transfer is difficult to realize because of the low transfer *** achieve a laser with a new-generation mechanism based on hot electron transfer,the photoelectric co-excitation is proposed for improving the efficiency of hot electron *** lasing behavior at 532 nm is realized with a threshold of 5 kw cm^(-2)and 1μA,which can be considered as the hot electron transfer resulting in population inversion ***,the lasing output power is 0.3 *** hot electrons transfer process was described via the transient absorption spectrum according to the improved ground-state bleaching and excited-state absorption signal in device *** comparison with the optical pump only,the quantum efficiencies of hot electron generation(HEG)and hot electron transfer(HET)were increased~31%and 31%,*** importantly,a triple gain mode coupling device including local surface plasmon,hot electron transfer,and array oscillation was *** modes of population inversion enhancement are *** study can provide theoretical and experimental reference for the research of hot electron lasers and devices.

关键词： polarization pump transfer

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数字化技术在脊柱外科手术教学中的应用

中华骨与关节外科杂志 2024年第7期17卷 668-672页

作者：李晨恺叶笑寒王升儒仉建国杨阳林莞锋杜悠赵钇伟中国医学科学院北京协和医学院北京协和医院骨科北京100730

脊柱外科手术操作难度高、风险大,手术带教在青年医师的手术培训中尤为重要。目前,脊柱外科的传统手术教学受限于教学资源,导致教学效率低、周期长,无法满足现阶段青年医师手术培训的需求。近年来,数字化技术辅助下的精准医疗和智慧医... 详细信息

脊柱外科手术操作难度高、风险大,手术带教在青年医师的手术培训中尤为重要。目前,脊柱外科的传统手术教学受限于教学资源,导致教学效率低、周期长,无法满足现阶段青年医师手术培训的需求。近年来,数字化技术辅助下的精准医疗和智慧医疗与外科手术结合日益紧密,数字化技术凭借其直观、精准、高效等独特优势,可有效弥补传统手术教学的不足,推动传统教学模式向数字化、智能化转变,有助于激发青年医师学习积极性、提升教学质量。现阶段,数字化技术在脊柱外科手术教学中的应用愈加广泛,各种教学新理念、新方法层出不穷。本文就脊柱外科手术教学的现状及包括3D打印、扩展现实、手术导航和手术机器人在内的数字化技术在脊柱外科手术教学中的应用和最新进展进行综述,供临床教学工作者参考。

关键词：脊柱外科数字化技术手术教学 3D打印扩展现实手术导航机器人

脑深部电刺激治疗药物难治性抽动秽语综合征的疗效观察

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中华神经外科杂志 2024年第1期40卷 17-21页

作者：高源范世莹高冬梅王慧敏葛燕韩春雷朱冠宇刘焕光石林张华杨岸超张建国孟凡刚首都医科大学北京市神经外科研究所北京100070 首都医科大学附属北京天坛医院神经外科学中心北京100070 北京丰台医院神经外科北京100070

目的探讨脑深部电刺激(DBS)治疗药物难治性抽动秽语综合征(TS)的临床疗效,初步观察以苍白球内侧部(GPi)与以中央中核-束旁核复合体(CM-Pf)为靶点的DBS在改善抽动症状方面的差异。方法回顾性分析2006年10月至2023年1月于首都医科大学附... 详细信息

目的探讨脑深部电刺激(DBS)治疗药物难治性抽动秽语综合征(TS)的临床疗效,初步观察以苍白球内侧部(GPi)与以中央中核-束旁核复合体(CM-Pf)为靶点的DBS在改善抽动症状方面的差异。方法回顾性分析2006年10月至2023年1月于首都医科大学附属北京天坛医院神经外科学中心接受DBS治疗且随访时间≥12个月的40例TS患者的临床资料。其中33例为GPi-DBS组,7例为CM-Pf-DBS组。随访术后6、12个月患者临床症状的改善情况。临床症状的主要评估指标为耶鲁综合抽动严重程度量表(YGTSS)评分,次要评估指标为贝克抑郁量表(BDI)、汉密尔顿抑郁量表(HRDS)、医院焦虑和抑郁量表(HADS)、耶鲁布朗强迫症严重程度量表(YBOSC)评分。对比分析两组YGTSS评分的改善情况。结果40例患者术前,术后6、12个月的YGTSS评分分别为(63.6±14.2)分、(42.0±15.0)分、(36.1±16.9)分,差异有统计学意义(P0.05)。GPi-DBS组有5例患者开机后出现恶心、呕吐或异动症状。结论DBS对药物难治性TS患者的抽动症状、焦虑情绪和抑郁情绪均有改善作用,且随着手术时间的延长,改善率有逐渐增加的趋势。初步观察显示,GPi-DBS与CM-Pf-DBS在改善抽动症状方面的差异不明显。

关键词：抽动秽语综合征深部脑刺激法治疗结果苍白球内侧部中央中核-束旁核复合体

An improved construction algorithm of polar codes based on the frozen bits

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Optoelectronics Letters 2024年第3期20卷 157-162页

作者： YUAN jianguo zhang Fengguo YU Linfeng PANG Yu School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China

In order to improve the problems that the minimum hamming weight(MHW) of the polar codes of the traditional Gaussian approximation(GA) construction is small and its performance is not good enough, an improved channel construction algorithm of polar codes based on frozen bits is proposed by combining the construction of the Reed-Muller(RM) code to effectively increase the MHW and analyzing the correcting and checking functions of the frozen bits in the successive cancellation list(SCL) decoding.

关键词： polar algorithm successive

Novel dynamic evidential Petri net for system reliability analysis

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Journal of Systems Engineering and Electronics 2017年第5期28卷 1019-1027页

作者： Wensheng Peng jianguo zhang Jinyang zhang School of Reliability and Systems Engineering Beihang University China Aero-Polytechnology Establishment Aviation Industry Corporation of China Science and Technology on Reliability and Environment Engineering Laboratory Beihang University

This paper proposes a novel dynamic Petri net (PN) model based on Dempster-Shafer (D-S) evidence theory, and this improved evidential Petri net (EPN) model is used in knowledge inference and reliability analysis of complex mechanical systems. The EPN could take epistemic uncertainty such as interval information, subjective information into account by applying D-S evidence quantification theory. A dynamic representation model is also proposed based on the dynamic operation rules of the EPN model, and an improved artificial bee colony (ABC) algorithm is employed to proceed optimization calculation during the complex systems' learning process. The improved ABC algorithm and D-S evidence theory overcome the disadvantage of extremely subjective in traditional knowledge inference efficiently and thus could improve the accuracy of the EPN learning model. Through a simple numerical case and a satellite driving system analysis, this paper proves the superiority of the EPN and the dynamic knowledge representation method in reliability analysis of complex systems.

关键词： evidence theory Petri net knowledge representation improved ABC algorithm imprecise information reliability

Design of Low-Power Turbo Encoder and Decoder for NB-IoT

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Chinese Journal of Electronics 2024年第2期33卷 403-414页

作者： Chong zhang Yuhang LIN Deming WANG jianguo HU School of Microelectronics Science and Technology Sun Yat-sen University School of Physics and Telecommunication Engineering South China Normal University School of Electronics and Information Engineering South China Normal University Development Research Institute of Guangzhou Smart City Shenzhen Research Institute of Sun Yat-sen University

Turbo code is an error correction coding scheme close to the Shannon limit, usually used in wireless data transmission. Based on the parallel Turbo code algorithm, a parallel Turbo code circuit design scheme is *** the encoder, the recursive systematic convolutional encoder is multiplexed. The decoder is divided into branch metric, recursive, maximum likelihood ratio, and external information calculation modules. The decoding algorithm is based on Max-Log-MAP, controlling the component decoder in parallel. And the state metric calculation in the decoding circuit is combined to reduce the overall power consumption effectively, enabling the encoder and decoder to be used in narrowband Internet of things(NB-IoT). Finally, the hardware scheme of the main functional modules of Turbo code encoding and decoding is designed and implemented. The results show that the dynamic power consumption is less than 50 m W. The overall on-chip power consumption is reduced by 40% at the frequency of 125 MHz compared with previous jobs.

关键词： Measurement Wireless communication Power demand Systematics Turbo codes System-on-chip Power dissipation

Electrochemical behavior of open-cellular structured Ti-6Al-4V alloy fabricated by electron beam melting in simulated physiological fluid:the significance of pore characteristics

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Journal of Materials Science & Technology 2022年第2期97卷 272-282页

作者： Xin Gai Rui Liu Yun Bai Shujun Li Yang Yang Shenru Wang jianguo zhang Wentao Hou Yulin Hao Xing zhang Rui Yang R.D.K.Misra Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Orthopedic Surgery Peking Union Medical College Hospital(PUMCH)Peking Union Medical College and Chinese Academy of Medical SciencesBeijing 100730China Department of Metallurgical Materialsand Biomedical EngineeringThe University of Texas at El Paso500W.University AvenueEl PasoTX 79968United States

The cellular structured titanium alloys have attracted significant attention for implants because of their lower Young’s modulus,which is comparable to human bone and has the capability of providing space for bone tissue ***,there is a gap in the knowledge in regard to the relationship between the pore characteristics and the electrochemical performance of open-cellular structured titanium *** this study,we elucidate the influence of pore characteristics on the electrochemical performance of open-cellular structured Ti-6Al-4V alloys produced by electron beam melting(EBM).Intriguingly,the passive film formed on cellular structured Ti-6Al-4V alloy with a larger pore size was more stable and protective,and the corrosion performance was superior compared to the samples with a smaller pore size in phosphate buffered saline(PBS),mainly because of relatively smaller exposed surface area and unlimited flow of ***,in acidic PBS containing fluoride ions,the pore characteristics did not play an important role in the corrosion *** was considered that the protective film breaks down such that the corrosion performance of cellular structured alloys was comparable to each other in this harsh environment.

关键词： Cellular structure Ti-6Al-4V Electron beam melting Corrosion resistance Fluoride ion

Investigating the effect of volatility on the hygroscopicities of acetate nanoparticle aerosols by surface plasmon resonance microscopy

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Journal of Environmental Sciences 2024年第4期138卷 167-178页

作者： Bo Yang Zhibo Xie jianguo Liu Huaqiao Gui Jiaoshi zhang Xiuli Wei Zetao Fan Douguo zhang Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Advanced Laser Technology Laboratory of Anhui Province Department of Optics and Optical EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Under high relative humidity(RH)conditions,the release of volatile components(such as acetate)has a significant impact on the aerosol *** this work,one surface plasmon resonance microscopy(SPRM)measurement system was introduced to determine the hygroscopic growth factors(GFs)of three acetate aerosols separately or mixed with glucose at different *** Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) aerosols,the hygroscopic growth trend of each time was lower than that of the previous time in three cyclic humidification from 70% RH to 90% RH,which may be due to the volatility of acetic acid leading to the formation of insoluble hydroxide(Ca(OH)_(2) or Mg(OH)_(2))under high RH *** the third calculated GF(using the Zdanovskii-Stokes-Robinson method)for Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) in bicomponent aerosols with 1:1 mass ratio were 3.20% or 5.33% lower than that of the first calculated GF at 90% *** calculated results also showed that the hygroscopicity change of bicomponent aerosol was negatively correlated with glucose content,especially when the mass ratio of Mg(CH_(3)COO)_(2) to glucose was 1:2,the GF at 90% RH only decreased by4.67% after three cyclic *** coupled plasma atomic emission spectrum(ICP-AES)based measurements also indicated that the changes of Mg^(2+)concentration in bicomponent was lower than that of the *** results of this study reveal thatduring the efflorescence transitions of atmospheric nanoparticles,the organic acids diffusion rate may be inhibited by the coating effect of neutral organic components,and the particles aging cycle will be prolonged.

关键词： Hygroscopic growth Volatility Acetate aerosols Nanoparticle aerosol Surface plasmon resonance