检索结果-南通市图书馆

维普期刊数据库

Quantum Neural Network for Quantum Neural co.puting

在线全文

学校读者我要写书评

暂无评论

Research 2024年第1期2023卷 71-80页

作者： Min-Gang Zhou Zhi-Ping Liu Hua-Lei Yin Chen-Long Li Tong-Kai Xu Zeng-Bing Chen National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China MatricTime Digital technology co.ltd. Nanjing 211899China

Neural networks have achieved impressive breakthroughs in both industry and *** to effectively develop neural networks on quantum co.puting devices is a challenging open ***,we propose a new quantum neural network model for quantum neural co.puting using(classically co.trolled)single-qubit operations and measurements on real-world quantum systems with naturally occurring environment-induced deco.erence,which greatly reduces the difficulties of physical *** model circumvents the problem that the state-space size grows exponentially with the number of neurons,thereby greatly reducing memory requirements and allowing for fast optimization with traditional optimization *** benchmark our model for handwritten digit reco.nition and other nonlinear classification *** results show that our model has an amazing nonlinear classification ability and robustness to ***,our model allows quantum co.puting to be applied in a wider co.text and inspires the earlier development of a quantum neural co.puter than standard quantum co.puters.

关键词： quantum thereby breakthrough

Through-polymer,via technology-enabled,flexible,lightweight,and integrated devices for implantable neural probes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第2期10卷 279-291页

作者： Cunkai Zhou Ye Tian Gen Li Yifei Ye Lusha Gao Jiazhi Li Ziwei Liu Haoyang Su Yunxiao Lu Meng Li Zhitao Zhou Xiaoling Wei Lunming Qin Tiger H.Tao Liuyang Sun co.lege of Electronics and Information Engineering Shanghai University of Electric PowerShanghaiChina 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina School of Graduate Study University of Chinese Academy of SciencesBeijingChina State Key Laboratory of Transducer technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina School of Physical Science and technology ShanghaiTech UniversityShanghaiChina Center for Excellence in Brain Science and Intelligence technology Chinese Academy of SciencesShanghaiChina Neuroxess co. Ltd.(Jiangxi)NanchangJiangxiChina Guangdong Institute of Intelligence Science and technology HengqinZhuhaiGuangdongChina Tianqiao and Chrissy Chen Institute for Translational Research ShanghaiChina

In implantable electrophysiological reco.ding systems,the headstage typically co.prises neural probes that interface with brain tissue and integrated circuit chips for signal *** advancements in MEMS and CMOS technology have significantly improved these co.ponents,their interco.nection still relies on co.ventional printed circuit boards and sophisticated *** co.ventional approach adds co.siderable weight and volume to the package,especially for high channel co.nt *** address this issue,we developed a through-polymer via(TPV)method inspired by the through-silico. via(TSV)technique in advanced three-dimensional *** innovation enables the vertical integration of flexible probes,amplifier chips,and PCBs,realizing a flexible,lightweight,and integrated device(FLID).The total weight of the FLIDis only 25%that of its co.ventional co.nterparts relying on adapters,which significantly increased the activity levels of animals wearing the FLIDs to nearly match the levels of co.trol animals without ***,by inco.porating a platinum-iridium alloy as the top layer material for electrical co.tact,the FLID realizes exceptional electrical performance,enabling in vivo measurements of both local field potentials and individual neuron action *** findings showcase the potential of FLIDs in scaling up implantable neural reco.ding systems and mark a significant advancement in the field of neurotechnology.

关键词： alloy neural reco.ding

Spatial distribution characteristics and influence factor analysis of landslides——case study of the Hanwang area in Qinba Mountains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Research Advances 2024年第3期4卷 55-65页

作者： Jikai Zhang Yanbo Cao Wen Fan Wenbo Zheng Zequan Wang Chengcheng He Hongquan Teng School of Geological Engineering and Geomatics Chang’an UniversityXi'an710054China Mine Geological Disasters Mechanism and Prevention Key Laboratory Xi'an710054China China DK co.prehensive Investigate and Design Research Institute co. Ltd.Xi'an710054China Shaanxi Engineering technology Research Center for Urban Geology and Underground space Xi'an710068China Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey CenterXi'an710068China Chang'an University Xi'anShaanxiChina

The geological hazards of landslides in Hanwang Town, Ziyang co.nty, Ankang City, Shaanxi Province, have emerged. Yet, the current understanding of the spatial distribution characteristics and influencing factors of landslides in this area remains unclear. co.bining the results of remote sensing interpretation and field investigation, seven influencing factors, namely, elevation, slope direction, slope gradient, distance from rivers, distance from faults, engineering geologic lithology, and distance from roads, are selected for the study. The distribution characteristics of landslides in each influencing factor and the influence of the resolution of the Digital Elevation Model(DEM) on the results are statistically and analytically analyzed. Furthermore, two highrisk landslides within the study area were subjected to co.prehensive analysis, integrating the findings from drilling and other field investigations in order to examine their deformation mechanisms. Based on this analysis,the following co.clusions were derived:(1) 34 landslides in the study area, mainly small earth landslides, with a distribution density of 0.42/km~2, threatening 414 people and property of about 55.87 million Yuan.(2)The landslides in the study area easily occur in the co.centrated in the range of 10°–40°, the distribution density of the landslides is higher in the closer distance from the river and the faults(0–200 m), the landslide-prone strata are mainly the softer and weaker metamorphic rocks, and the landslides are mainly around roads.(3) The resolution of the DEM should be selected based on the specific co.ditions of the study area, the requirements of the investigation, and the scale of the landslide. Opting for an appropriate DEM resolution is advantageous for understanding the patterns of landslides and co.ducting risk assessments in the region.(4) The Zhengjiabian landslide is a trac

关键词： Landslide Spatial distribution Influence factor Landslide density Deformation mechanism DEM

维普期刊数据库

Null steering antenna beamforming utilizing space-time adaptive processing

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Teleco.munications 2015年第4期22卷 51-55页

作者： Zeng Hao Ahmad Zeeshan Dong Tao Liu Ling School of co.munications Engineering Chongqing University space star technology co. Ltd

A new architecture of null steering antenna based upon the technology of space-time adaptive processing（STAP） with optimized parameters is proposed. The new STAP antenna is co.prised of multiple channels and each channel is a transversal filter. So separate sensor element for the reference signal is not required because the antenna gets the reference signal from the first sensor of the auxiliary array. Furthermore, the least mean square（LMS） algorithm is employed to calculate the weight vector. Detailed analysis about the relationship between noise power and output error is investigated. co.pared with the traditional null steering antenna in space or space-time domain, the new approach obtains more freedom degrees and can suppress both the wideband and narrowband interferences more efficiently with deeper nulls. Simulation results shows that the proposed architecture outperforms the co.ventional STAP techniques for interference suppression.

关键词： null steering antenna STAP beamforming interference mitigation

维普期刊数据库

The implementation of rapid acquisition algorithm for GPS weak signal by using FPGA

在线全文

学校读者我要写书评

暂无评论

The implementation of rapid acquisition algorithm for GPS we...

A regulated digital currency

第五届中国卫星导航学术年会

作者： Wang yuanlei Gao yang Wang meng space star technology co. Ltd

ISBN: (纸本)9783642547362

The traditional acquisition technology of low oribit GPS signal has been widely applied in the design of GPS navigation receiver. However, navigation receiver can only accept the navigation signal which co.es from the other end of the earth when running above the navigation co.stellation, which results the decline of GPS navigation visibility and signal power , and the navigation signal power from high oribit navigation receiver will reduce 10dB at least than low oribit navigation receiver and traditional fast acquisition design can not meet design requirements of high oribit navigation receiver. Therefore, this paper present a design which increase times of co.erent integration to improve ratio of carrier and noise of received signal, at the same time, it uses full link simulation by simulink to vertify feasibility of the design, the final design of weak signal acquisition, through the test of Xilinkco.pany Virtex4 series FPGA chip based on the weak signal acquisition sensitivity up to -176dB. Because the GLONASS navigation system and BDS navigation and GPS navigation system using spread spectrum co.munication system, different with GPS navigation system in production of presuco.e ratio and presurange and the carrier frequence paramaters. Therefore, this fast acquisition algorithm for GPS weak signal adapt to the design of GLONASS navigation reciver and BDS navigation reciever.

关键词： GPS. Weak Signal. fast acquisition. High Orabit

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2019年第3期62卷 119-130页

作者： Yanbing WU Haining FAN Xiaoyun WANG Guangnan ZOU Institute for Advanced Study Tsinghua University Department of co.puter Science and technology Tsinghua University space star technology co. Ltd

The decentralized digital currency Bitco.n is an anonymous alternative to the centralized banking system and enjoys widespread and increasing adoption. Since Bitco.n created, many other electronic currencies have been developed. We propose a protoco. for an electronic currency for making anonymous payments that can be supervised by an auditor, who has sole access to the transaction history. Other electronic currencies provide only anonymity, which is co.venient for making illegal transactions without regulation. For users, miners, and banks, the transactions of our electronic currency are anonymous, and only auditors can see how it is used. We make use of POW(prove-of-work) technique that allows for distributed decisionmaking within a network, namely the Bitco.n blockchain protoco.. We co.bine the POW and blockchain technology of Bitco.n to give better protection against double-spending attacks.

关键词： Blockchain Bitco.n anonymous digital currency regulated proof-of-work

Predicting Turbidite Channel in Deep-Water Canyon Based on Grey Relational Analysis-Support Vector Machine Model:A Case Study of the Lingshui Depression in Qiongdongnan Basin,South China Sea

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2024年第9期121卷 2435-2447页

作者： Haichen Li Jianghai Li Li Li Zhandong Li School of Earth and space Sciences Peking UniversityBeijing100871China Key Laboratory of Orogenic Belts and Crustal Evolution Peking UniversityBeijing100871China Geotechnical Physical and Mechanical Properties Laboratory Langfang Normal UniversityLangfang065000China Heilongjiang Northeast Petroleum University Science Park Development co. Ltd.Daqing163318China co.lege of Petroleum Engineering Northeast Petroleum UniversityDaqing163318China

The turbidite channel of South China Sea has been highly *** by the co.plex fault and the rapid phase change of lithofacies,predicting the channel through co.ventional seismic attributes is not accurate *** response to this disadvantage,this study used a method co.bining grey relational analysis(GRA)and support vectormachine(SVM)and established a set of prediction technical procedures suitable for reservoirs with co.plex geological *** the case study of the Huangliu Formation in Qiongdongnan Basin,South China Sea,this study first dimensionalized the co.ventional seismic attributes of Gas Layer Group I and then used the GRA method to obtain the main relational factors.A higher relational degree indicates a higher probability of responding to the attributes of the turbidite *** study then accumulated the optimized attributes with the highest relational factors to obtain a first-order accumulated sequence,which was used as the input training sample of the SVM model,thus successfully co.structing the SVM turbidite channel *** results prove that the GRA-SVMmethod has a high drilling co.ncidence *** the co.e and logging data and taking full use of the advantages of seismic inversion in predicting the sand boundary of water channels,this study divides the sedimentary microfacies of the Huangliu Formation in the Lingshui 17-2 Gas *** co.prehensive study has shown that the GRA-SVM method has high accuracy for predicting turbidite channels and can be used as a superior turbidite channel prediction method under co.plex geological co.ditions.

关键词： Support vector machine channel Huangliu Formation Qiongdongnan Basin

A Normalizing Flow-Based Bidirectional Mapping Residual Network for Unsupervised Defect Detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

co.puters, Materials & co.tinua 2024年第2期78卷 1631-1648页

作者： Lanyao Zhang Shichao Kan Yigang Cen Xiaoling Chen Linna Zhang Yansen Huang School of Mechanical Engineering Guizhou UniversityGuiyang550025China School of co.puter Science and Engineering Central South UniversityChangsha410083China School of co.puter and Information technology Beijing Jiaotong UniversityBeijing100044China co.lege of Civil Engineering Guizhou UniversityGuiyang550025China Guizhou Lianjian Civil Engineering Quality Inspection Monitoring Center co. Ltd.Guiyang550025China

Unsupervised methods based on density representation have shown their abilities in anomaly detection,but detection performance still needs to be ***,approaches using normalizing flows can accurately evaluate sample distributions,mapping normal features to the normal distribution and anomalous features outside ***,this paper proposes a Normalizing Flow-based Bidirectional Mapping Residual Network(NF-BMR).It utilizes pre-trained co.volutional Neural Networks(CNN)and normalizing flows to co.struct discriminative source and target domain feature ***,to better learn feature information in both domain spaces,we propose the Bidirectional Mapping Residual Network(BMR),which maps sample features to these two spaces for anomaly *** two detection spaces effectively co.plement each other’s deficiencies and provide a co.prehensive feature evaluation from two perspectives,which leads to the improvement of detection *** experimental results on the MVTec AD and DAGM datasets against the Bidirectional Pre-trained Feature Mapping Network(B-PFM)and other state-of-the-art methods demonstrate that the proposed approach achieves superior *** the MVTec AD dataset,NF-BMR achieves an average AUROC of 98.7%for all 15 ***,it achieves 100%optimal detection performance in five *** the DAGM dataset,the average AUROC across ten categories is 98.7%,which is very close to supervised methods.

关键词： Anomaly detection normalizing flow source domain feature space target domain feature space bidirectional mapping residual network

Ground settlement and tunnel response due to twin-curved shield tunnelling in soft ground with small clear distance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3122-3135页

作者： Yao Hu Haoran Tang Yinggang Xu Huayang Lei Peng Zeng Kai Yao Yabo Dong State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China Research Center of Tunneling and Underground Engineering of Ministry of Education Beijing Jiaotong UniversityBeijing100044China co.lege of Environment and Civil Engineering Chengdu University of TechnologyChengdu610059China School of Civil Engineering Tianjin UniversityTianjin300350China School of Qilu Transportation Shandong UniversityJinan250002China Power China Sinohydro Bureau 7 co. Ltd.Chengdu610213China

Twin curved tunnels are often enco.ntered in shield tunnelling,where significant co.plexities in densely exploited underground space are *** this study,the ground settlement and tunnel deformation due to twin-curved shield tunnelling in soft ground were investigated using numerical simulation and field *** curvature radii of twin curved tunnels and subsequent effects of tunnel co.struction were co.sidered to reveal the tunnelling effect on ground surface settlement and tunnel *** results show that the settlement trough yields one offset towards inside of curved shield *** location of settlement trough and maximum settlement were affected by curvature radius but except for the shape and width of settlement *** parallel twin-curved shield tunnelling co.ld increase the offset of existing settlement trough and maximum ***,an empirical prediction of surface settlement trough due to twin-curved shield tunnelling with same tunnel diameters in soft clay was proposed,which was applicable to curvature radius less than 800 ***,a minimum radius of 600 m of curvature tunnel was proposed in terms of allowable co.vergence deformation of *** result co.ld provide guidance on safety evaluation for twin curved shield tunnelling co.struction.

关键词： Shield tunnelling Curvature radius Ground settlement Tunnel deformation Numerical simulation