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Flexibility potential of Cs_(2)BX_(6)(B=Hf,Sn,Pt,Zr,Ti;X=I,Br,Cl)with application in photovoltaic devices and radiation detectors

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Journal of Energy Chemistry 2024年第8期95卷 271-287,I0006页

作者： Songya Wang Changcheng Chen Shaohang Shi Ziyi zhang Yan Cai Shuli Gao Wen Chen Shuangna Guo Elyas Abduryim Chao Dong Xiaoning Guan ying liu Gang liu Pengfei lu school of Science Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Key laboratory of Eco Planning&Green Building Ministry of EducationTsinghua UniversityBeijing 100080China State Key laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China school of Physics and Optoelectronic engineering Ludong UniversityYantai 264025ShandongChina

As interest in double perovskites is growing,especially in applications like photovoltaic devices,understanding their mechanical properties is vital for device *** extensive exploration of structure and optical properties,research on mechanical aspects is *** article builds a vacancyordered double perovskite model,employing first-principles calculations to analyze mechanical,bonding,electronic,and optical *** show Cs_(2)Hfl_(6),Cs_(2)SnBr_(6),Cs_(2)SnI_(6),and Cs_(2)PtBr_(6)have Young's moduli below 13 GPa,indicating *** parameters explain flexibility variations with the changes of B and X site *** characteristic exploration reveals the influence of B and X site electronegativity on mechanical ***_(2)SnBr_(6)and Cs_(2)PtBr_(6)are suitable for solar cells,while Cs_(2)HfI_(6)and Cs_(2)TiCl_(6)show potential for semi-transparent solar *** property calculations highlight the high light absorption coefficients of up to 3.5×10^(5) cm^(-1)for Cs_(2)HfI_(6)and Cs_(2)TiCl_(6).Solar cell simulation shows Cs_(2)PtBr_(6)achieves 22.4%of conversion ***_(2)ZrCl_(6)holds promise for ionizing radiation detection with its 3.68 eV bandgap and high absorption ***-ordered double perovskites offer superior flexibility,providing valuable insights for designing stable and flexible *** understanding enhances the development of functional devices based on these perovskites,especially for applications requiring high stability and flexibility.

关键词： Double perovskite Mechanical properties Flexible Photovoltaic Radiation detectors

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Phase I clinical trial of intracerebral injection of lentiviral-ABCD1 for the treatment of cerebral adrenoleukodystrophy

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Science Bulletin 2024年第16期69卷 2596-2603页

作者： Qiu-hong Wang Jing Wanga Zhi-Pei ling Zhi-Qiang Cui Jie Gong Rui zhang Shi-Jun li yang-yang Wang Rui yang De-Hui huang Wen He Jing Gao Chen Feng Pei-li Hu li-ying liu lung-Ji Chang li-Ping Zou Senior Department of Pediatrics Chinese PLA General HospitalBeijing 100853China Medical school of Chinese PlA Beijing 100853China Department of Neurosurgery Hainan Hospital of PLA General HospitalSanya 572013China Department of Neurosurgery The First Medical Center of Chinese PLA General HospitalBeijing 100853China Chengdu Women’s and Children’s Central Hospital School of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 611731China school of Medicine University of Electronic Science and Technology of ChinaChengdu 610054China beijing Meikang Biotechnology Co. LTD.Beijing 100085China Department of Radiology The First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Neurology The First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Pediatrics Xuanwu HospitalCapital Medical UniversityBeijing 100053China Shenzhen Geno-Immune Medical Institute Shenzhen 518057China Beijing Institute for Brain Disorders Center for Brain Disorders Research Capital Medical UniversityBeijing 100069China

This was a single-arm,multicenter,open-label phase I *** vectors(lV)carrying the ABCD1 gene(lV-ABCD1)was directly injected into the brain of patients with childhood cerebral adrenoleukodystrophy(CCAlD),and multi-site injection was *** injection dose increased from 200 to 1600 ll(vector titer:1×10^(9) transduction units per ml(TU/ml)),and the average dose per kilogram body weight ranges from 8 to 63.6 ll/*** primary endpoint was safety,dose-exploration and immunogenicity and the secondary endpoint was initial evaluation of efficacy and the expression of ABCD1 protein.A total of 7 patients participated in this phase I study and were followed for 1 *** injectionrelated serious adverse event or death *** adverse events associated with the injection were irritability(71%,5/7)and fever(37.2-38.5℃,57%,4/7).Adverse events were mild and selflimited,or resolved within 3 d of symptomatic *** maximal tolerable dose is 1600 *** 5 cases(83.3%,5/6),no lentivirus associated antibodies were *** overall survival at 1-year was 100%.The ABCD1 protein expression was detected in neutrophils,monocytes and *** study suggests that the intracerebral injection of lV-ABCD1 for CCAlD is safe and can achieve successful lV transduction in vivo;even the maximal dose did not increase the risk of adverse ***,the direct lV-ABCD1 injection displayed low *** addition,the effectiveness of intracerebral lV-ABCD1 injection has been preliminarily demonstrated while further investigation is *** study has been registered in the Chinese Clinical Trial Registry(https://***/,registration number:ChiCTR1900026649).

关键词： Adrenoleukodystrophy lentiviral vectors ABCD1 Intracerebral injection

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Design and analysis of quantized controllable doped left-handed materials

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The Journal of china Universities of posts and telecommunications 2011年第3期18卷 99-104页

作者： lIU Wen zhang hong-xin WANG hong lU ying-hua CHEN Nan MEN Shuo school of electronic engineering Beijing University of Posts and Telecommunications Beijing 100876 China beijing National Railway Research and Design Institute of Signal and Communication Beijing 100073 China College of electronic Information and Automation Chongqing University of Technology Chongqing 400054 China

Two kinds of controllable doped left-handed materials （DlHMs） were designed by inserting inductors and capacitors into the traditional left-handed material （lHM） as heterogeneous elements respectively, which are DlHM with inductors （lDlHM） and DlHM with capacitors （CDlHM）. The characteristics of transmission spectrum were studied by using finite-difference time-domain method （FDTD）. Compared with the traditional lHM, the resonance strength of the lDlHM is weakened and the pass-band is narrowed, but with the increase of the value of the inserted inductors, the bandwidth is expanded. As capacitors inserted into the lHM, the pass-band of the CDlHM is expanded, but the pass-band is shifted to low frequency and the bandwidth is narrowed with the increase of the value of the capacitors, meanwhile, a new generated pass-band is also shifted to low frequency. Therefore, a quantized controllable doped left-handed material can be achieved.

关键词： electromagnetics left-handed material pass-band capacitors inductors

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Networked Industrial Agglomeration of electronic Equipment Manufacturing Industry in Guangdong Province

Networked Industrial Agglomeration of Electronic Equipment M...

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基于互联网的商业管理学术会议

作者： Han zhang1 Jia An2 1lecturer.school of Economics and Management beijing university of posts and telecoms BUPT beijing china 2Professor.school of Economics and Management beijing university of posts and telecoms BUPT beijing china

In recent years,the agglomeration of china’s electronic equipment manufacturing industry has developed rapidly,showing a trend of networked *** province is a main industrial agglomeration area of electronic equipment manufacturing *** research on its agglomerative phenomenon and trend is ***,we define the networked industrial agglomeration and briefly review relevant researches both at home and *** we analyze the current situation of the networked industrial agglomeration in Guangdong province and find some problems,such as low economic efficiency,lacking of creativity and international competitiveness,serious environmental pollution,and so *** this basis,we start the empirical study of networked industrial agglomeration of electronic equipment manufacturing industry in Guangdong province so that we could make judgment about its development stage and tendency.

关键词： networked industrial agglomeration electronic equipment manufacturing industry(EEMI)

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Generation of orthogonal UWB shaping pulses based on compressed chirp signal

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The Journal of china Universities of posts and telecommunications 2007年第2期14卷 99-102页

作者： CHE Shu-liang zhang hong-xin lU ying-hua HE Peng-fei College of Physics and electronic engineering the Centre University for Nationalities Beijing 100081 China school of electronic engineering Beijing University of Posts and Telecommunications Beijing 100876 China

This study investigates a novel method to numerically generate orthogonal ultrawide band （UWB） shaping pulses based on compressed chirp signal. First, a pulse template with less than 1 ns duration time, which is used to construct a Hermitian matrix, is produced with a compressed chirp pulse. Sub-nanosecond orthogonal pulses are then generated for UWB by using the Hermitian matrix eigenvectors. The simulation results show that the power spectral density distribution of the UWB shaping pulses met the constraint of Federal communications commissions （FCC） spectral mask. The shaping pulses not only have higher spectrum utilization ratio and very short time duration but also have excellent autocorrelation and cross-correlation properties, which is an advantage to reduce the interference between multiusers. Especially, a method to produce sub-nanosecond orthogonal UWB shaping pulses by using a relatively longer duration chirp signal is presented.

关键词： UWB shaping pulse spectrum utilization ratio interference between multiusers

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Sr偏析Al晶界结构的第一性原理计算

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物理学报 2008年第7期57卷 4428-4433页

作者：刘利花张颖吕广宏邓胜华王天民北京航空航天大学理学院物理系北京100083

采用基于密度泛函理论和局域密度近似的第一性原理赝势方法,计算了纯Al晶界和杂质Sr偏析Al晶界的原子结构和电子结构.结果表明Sr偏析引起了晶界膨胀和晶界处电子密度的大幅度降低,从而导致晶界结合力的减弱.这应为Sr杂质偏析引起的Al晶... 详细信息

采用基于密度泛函理论和局域密度近似的第一性原理赝势方法,计算了纯Al晶界和杂质Sr偏析Al晶界的原子结构和电子结构.结果表明Sr偏析引起了晶界膨胀和晶界处电子密度的大幅度降低,从而导致晶界结合力的减弱.这应为Sr杂质偏析引起的Al晶界脆化的主要根源所在.

关键词： Al晶界 Sr 杂质偏析第一性原理计算

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Efficient Design and Optimization Method for Distributed Amplifiers

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Journal of Shanghai Jiaotong university(Science) 2019年第3期24卷 281-286页

作者： zhang ying lI Zeyou lI xin yang hua school of electronic and Optical engineering Nanjing university of posts and telecommunications Nanjing 210023China school of Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210023China

A novel design and optimization method for distributed amplifiers(DAs)is proposed to make the circuit design more convenient and *** method combines artificial intelligence(AI)optimization with manual design by two loops,i.e.,outer manual loop and inner AI *** layout design is followed by AI optimization to take more influencing factors such as parasitic effect into account for the practicability.A DA with three gain cells is designed and optimized in a standard 0.18μm complementary metal-oxide-semiconductor(CMOS)technology to verify the proposed *** a chip area of only 0.55 mm2,the DA provides 9.8 dB average forward gain from 1 to 15.2 *** output power at 1 dB output compression point is more than 7.7 dBm in the 2-14 GHz frequency band and the peak power-added efficiency(PAE)is 10.6%.The measurement results validate the proposed method as a robust DA design procedure for improving circuit performance and design efficiency.

关键词： distributed amplifier(DA) artificial intelligence(AI) impedance matching power-added efficiency(PAE)

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面向智算融合网络的自主防御范式研究

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电子学报 2024年第5期52卷 1432-1441页

作者：刘颖夏雨于成晓张维庭汪润虎张宏科北京交通大学电子信息工程学院北京100044 鹏城实验室广东深圳518055 中国电子科技集团有限公司第二十八研究所江苏南京210007

随着数字经济时代算力供给模式的变革,以算力为核心的新型网络基础设施已成为实现算力资源共享、支撑数字经济转型的重要动力.在算力网络中,多元异构用户终端通过多种方式高频接入网络以随时随地获取算力服务,网络的开放性和动态性增大... 详细信息

随着数字经济时代算力供给模式的变革,以算力为核心的新型网络基础设施已成为实现算力资源共享、支撑数字经济转型的重要动力.在算力网络中,多元异构用户终端通过多种方式高频接入网络以随时随地获取算力服务,网络的开放性和动态性增大,算力网络将面临更严峻的安全挑战.然而,基于传统网络的安全防御模式通常针对具体安全问题静态式增补安全防护组件,无法主动适配用户需求灵活调整防御策略,难以应对算力网络中的安全风险.因此,本文面向新型算力网络安全需求,将安全功能作为网络内部属性,基于智算融合网络提出一种多维协同自主防御范式.结合智算融合网络“三层”“三域”的设计思想,在“三层”中,以广义服务层定义安全固有服务,以映射适配层智慧适配安全功能,以融合组件层执行安全策略;在“三域”中,以实体域先导资源适配,以知识域驱动安全服务流程,以感控域实施具体安全技术,构建“检测”“溯源”“防御”三维一体的完整基础管控流程,其中安全策略与技术可根据场景扩展性与业务安全性进行灵活调整.最终,通过仿真实验对所提范式有效性进行了验证,为未来智算融合安全的进一步研究和应用提供参考.

关键词：智算融合网络算力网络自主防御防御范式网络攻击

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Implementation of compressive sensing in ECG and EEG signal processing

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The Journal of china Universities of posts and telecommunications 2010年第6期17卷 122-126页

作者： zhang hong-xin WANG Hai-qing lI Xiao-ming lU ying-hua zhang li-kun school of electronic engineering Beijing University of Posts and Telecommunications Beijing 100876 China The Translation Group of the Certain Department of the SecondArtillery Force of PlA Beijing 100015 China

The purpose of this paper is to exploit compressive sensing （CS） method in dealing with electrocardiography （ECG） and electroencephalography （EEG） signals at a high compression ratio. In order to get sparse data of ECG and EEG signals before being compressed,a combined scheme was presented by using wavelet transform and iterative threshold method; then,compressive sensing is executed to make the data compressed. After doing compressive sensing,Bayesian compressive sensing （BCS） is used to reconstruct the original signals. The simulation results show that compressive sensing is an effective method to make data compressed for ECG and EEG signals with high compression ratio and good quality of reconstruction. Furthermore,it shows that the proposed scheme has good denoising effects.

关键词： CS ECG EEG

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UWB multi-pulse position modulation for high data-rate wireless application

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The Journal of china Universities of posts and telecommunications 2006年第4期13卷 19-23页

作者： WANG Ye-qiu lU ying-hua zhang hong-xin HE Peng-fei zhang li-kun school of Telecommunication and Network Technology Beijing University of Posts and Telecommunications Beijing 100876 China school of electronic engineering Beijing Unive~ity of Posts and Telecommunications Beijing 100876 China The Translation Department of the Second Artillery Troops of PlA Beijing 100820 China

A new ultra-wide band （UWB） modulation scheme called l-ary ultra-wide band time hopping multi-pulse position modulation （UWB-TH-MPPM） is proposed for high data-rate wireless application, which can provide better communication performance. The constant weight code is introduced to construct the MPPM signal and the comparison between MPPM and single pulse position modulation （SPPM） is done in three aspects, namely, power efficiency, bandwidth efficiency, and probability of symbol error, respectively. The theoretical analysis and the numerical results show that when the constant weight code is appropriately chosen, MPPM can achieve lower probability of symbol error and higher power efficiency than SPPM at the cost of more bandwidth under the same condition. The proposed MPPM can be a good candidate in UWB system design.

关键词： UWB SPPM MPPM constant weight code

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