检索结果-南通市图书馆

PSRDP:A Parallel Processing Method for Pulsar Baseband data

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第1期24卷 300-310页

作者： Ya-Zhou Zhang hai-Long Zhang Jie Wang Xin-Chen Ye Shuang-Qiang Wang Xu Du Han wu Ting Zhang Shao-Cong Guo Meng Zhang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China National Astronomical data Center Beijing 100101China Southeast University Nanjing 211189China School of Cyber Science and Engineering Qufu Normal UniversityQufu 273165China

To address the problem of real-time processing of ultra-wide bandwidth pulsar baseband data,we designed and implemented a pulsar baseband data processing algorithm(PSRDP)based on GPU parallel computing *** can perform operations such as baseband data unpacking,channel separation,coherent dedispersion,Stokes detection,phase and folding period prediction,and folding integration in GPU *** tested the algorithm using the J0437-4715 pulsar baseband data generated by the CASPSR and Medusa backends of the Parkes,and the J0332+5434 pulsar baseband data generated by the self-developed backend of the Nan Shan Radio *** obtained the pulse profiles of each baseband *** experimental analysis,we have found that the pulse profiles generated by the PSRDP algorithm in this paper are essentially consistent with the processing results of Digital Signal Processing Software for Pulsar Astronomy(DSPSR),which verified the effectiveness of the PSRDP ***,using the same baseband data,we compared the processing speed of PSRDP with DSPSR,and the results showed that PSRDP was not slower than DSPSR in terms of *** theoretical and technical experience gained from the PSRDP algorithm research in this article lays a technical foundation for the real-time processing of QTT(Qi Tai radio Telescope)ultra-wide bandwidth pulsar baseband data.

关键词： (stars:)pulsars:general methods:data analysis techniques:miscellaneous

A Cross-matching Service for data Center of Xinjiang Astronomical Observatory

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第1期24卷 119-127页

作者： hai-Long Zhang Jie Wang Xin-Chen Ye Wan-Qiong Wang Jia Li Ya-Zhou Zhang Xu Du Han wu Ting Zhang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China National Astronomical data Center Beijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Cross-matching is a key technique to achieve fusion of multi-band astronomical catalogs. Due to different equipment such as various astronomical telescopes, the existence of measurement errors, and proper motions of the celestial bodies, the same celestial object will have different positions in different catalogs, making it difficult to integrate multi-band or full-band astronomical data. In this study, we propose an online cross-matching method based on pseudo-spherical indexing techniques and develop a service combining with high performance computing system(Taurus) to improve cross-matching efficiency, which is designed for the data Center of Xinjiang Astronomical Observatory. Specifically, we use Quad Tree Cube to divide the spherical blocks of the celestial object and map the 2D space composed of R.A. and decl. to 1D space and achieve correspondence between real celestial objects and spherical patches. Finally, we verify the performance of the service using Gaia 3 and PPMXL catalogs. Meanwhile, we send the matching results to VO tools-Topcat and Aladin respectively to get visual results. The experimental results show that the service effectively solves the speed bottleneck problem of crossmatching caused by frequent I/O, and significantly improves the retrieval and matching speed of massive astronomical data.

关键词： virtual observatory tools astronomical databases:miscellaneous catalogs

Meiotic transcriptional reprogramming mediated by cell-cell communications in humans and mice revealed by scATACseq and scRNA-seq

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2024年第3期45卷 601-616页

作者： hai-Quan Wang Xiao-Long wu Jing Zhang Si-Ting Wang Yong-Juan Sang Kang Li Chao-Fan Yang Fei Sun Chao-Jun Li State Key Laboratory of Reproductive Medicine and Offspring Health Center for Global HealthSchool of Public HealthNanjing Medical UniversityNanjingJiangsu 211166China Medical School Nanjing UniversityNanjingJiangsu 210093China Zhejiang University School of Medicine HangzhouZhejiang 310016China Department of Urology and Andrology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiang 310000China Model Animal Research Center of Medical School Nanjing UniversityNanjingNanjingJiangsu 210093China Liangzhu Laboratory Zhejiang UniversityHangzhouZhejiang 311121China

Meiosis is a highly complex process significantly influenced by transcriptional ***,studies on the mechanisms that govern transcriptomic changes during meiosis,especially in prophase I,are ***,we performed single-cell ATAC-seq of human testis tissues and observed reprogramming during the transition from zygotene to pachytene *** event,conserved in mice,involved the deactivation of genes associated with meiosis after reprogramming and the activation of those related to spermatogenesis before their functional ***,we identified 282 transcriptional regulators(TRs)that underwent activation or deactivation subsequent to this *** suggested that physical contact signals from Sertoli cells may regulate these TRs in spermatocytes,while secreted ENHO signals may alter metabolic patterns in these *** results further indicated that defective transcriptional reprogramming may be associated with non-obstructive azoospermia(NOA).This study revealed the importance of both physical contact and secreted signals between Sertoli cells and germ cells in meiotic progression.

关键词： Single-cell RNA-seq Single-cell ATAC-seq Spermatogenesis Meiosis Transcriptional reprogramming Cell-cell communication

Clinical effect of acupuncture at ghost points combined with fluoxetine hydrochloride on mild-to-moderate depression

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2024年第6期14卷 848-856页

作者： Yi Wang Qun Lu Ittipalanukul Penpat Juan wu Dilinuer Abulikemu Fei-Cui Zeng Jia-Ying Huang Zhi-hai Hu Department of Acupuncture and Moxibustion Shanghai Hospital of Integrated Traditional Chinese and Western MedicineThe Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 200082China Department of Laboratory Medicine Shanghai Hospital of Integrated Traditional Chinese and Western MedicineThe Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 200082China Department of Postgraduate Student Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Radiology Shanghai Hospital of Integrated Traditional Chinese and Western MedicineThe Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 200082China Department of General Practice Shanghai University of Traditional Chinese Medicine Affiliated Shuguang HospitalShanghai 200120China General Practice of Traditional Chinese Medicine North Bund Street Community Health Service CenterShanghai 200080China General Practice of Traditional Chinese Medicine Shanghai Hongkou District Jiaxing Road Community Health Service CenterShanghai 200082China

BACKGROUND Depression is a common,chronic,and recurrent mood disorder that has become a worldwide health *** hydrochloride,a common treatment method,can inhibit 5-hydroxytryptamine(5-HT)recycling in the presynaptic membrane;however,the efficacy of a single drug is *** present,mildto-moderate depression can be treated with acupuncture of ghost caves,but the clinical curative effect of combined therapy with fluoxetine hydrochloride has not been sufficiently *** To evaluate the clinical effect of acupuncture at ghost points combined with fluoxetine hydrochloride in the treatment of mild-to-moderate *** This retrospective study included 160 patients with mild-to-moderate depression who were admitted to Shanghai Hospital of Integrated Traditional Chinese and Western Medicine,Affiliated to Shanghai University of Traditional Chinese Medicine,between January 2022 and June *** were separated into a single-agent group(fluoxetine hydrochloride treatment,n=80)and a coalition group(fluoxetine hydrochloride treatment combined with acupuncture at ghost points,n=80).Pre-treatment symptoms were recorded,and the clinical curative effect and adverse reactions[Asberg Antidepressant Side Effects Scale(SERS)]were *** before and after treatment[Hamilton Depression Scale(HAMD)-24],neurotransmitter levels[5-HT,norepinephrine(NE),dopamine(da)],oxidative stress indicators[superoxide dismutase(SOD),malondialdehyde(Mda)],and sleep quality[Pittsburgh Sleep Quality Index(PSQI)]were *** The total efficacy rate was 97.50%in the coalition group and 86.25%in the single-agent group(Pda,5-HT,and SOD in the coalition and single-agent group

关键词： Depression Prick Fluoxetine hydrochloride Curative effect Depressive symptoms Oxidative stress index

Human hair follicle bulge cells:potential germ cells for skin tissue engineering

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Human hair follicle bulge cells:potential germ cells for ski...

UWLPIPE:Ultra-wide Bandwidth Low-frequency Pulsar data Processing Pipeline

第八届全国烧伤外科学年会

作者： Wang Hong-Tao Tao Ke Chen Bi Tang Chao-wu Hu da-hai Department of Burn Surgery,Xijing Hospital,Fourth Military Medical University,Xi''an,710032,P.R.China

＜正＞hair follicle stem cells （HFSCs） within the human hair follicle bulge are critical for hair development and cycling,wound healing,and ***,the absence of accurate and efficient isolation of human hair follicle bulge cells （HFBCs） hampered further investigation in using them as donor cells for skin *** our experiments,HFBCs isolated from human fetal hair follicles by collagense digestion were cultured,purified and passaged,and the morphological and biological characters of cultured bulge cells were observed by microscopy and immunocytochemistry,the clone formation efficiency and cell cycle were also *** the HFBCs with dermal papilla cells （DPCs） were seeded in PGA-collagen scaffolds as bioengineered dermis and transplanted to repair the full-thickness wound on the back of athymic *** scaffolds seeded with DPCs only were also investigated as control. The reformed skin in transplantation area was biopsied for observation on the structure and regeneration of hair follicles and *** results showed that the modified methods could isolate and purify HFBCs efficiently and the cells represented much characters of stem cells,such as high clone forming efficiency, slowly cycling,positive immunocytochemistry staining of K19 and *** staining of grafts indicated that the PGA-collagen hybrid scaffolds seeded with HFBCs and DPCs not only repaired the full-thickness wound on the back of athymic rice,but also showed much similar configuration to normal *** results indicated that the hair follicle stem cells participated in both wound healing and re-plastic of structure and function of newborn skin.

关键词：

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

Research in Astronomy and Astrophysics 2024年第7期24卷 145-157页

作者： Ya-Zhou Zhang hai-Long Zhang Jie Wang Jian Li Xin-Chen Ye Shuang-Qiang Wang Xu Du Han wu Ting Zhang Shao-Cong Guo Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China National Astronomical data Center Beijing 100101China Southeast University Nanjing 211189China

For real-time processing of ultra-wide bandwidth low-frequency pulsar baseband data,we designed and implemented an ultra-wide bandwidth low-frequency pulsar data processing pipeline(UWLPIPE)based on the shared ringbuffer and GPU parallel *** runs on the GPU cluster and can simultaneously receive multiple 128 MHz dual-polarization VDIF data packets preprocessed by the front-end *** aligning the dual-polarization data,multiple 128M subband data are packaged into PSRdada baseband data or multi-channel coherent dispersion filterbank data,and multiple subband filterbank data can be spliced into wideband data after time *** used the Nanshan 26 m radio telescope with the L-band receiver at964~1732 MHz to observe multiple ***,we processed the data using DSPSR software,and the results showed that each subband could correctly fold out the pulse profile,and the wideband pulse profile accumulated by multiple subbands could be correctly aligned.

关键词： (stars)pulsars general-methods data analysis-techniques miscellaneous

The effect of plasma irradiation on the electrical properties of tellurium nanosheets

在线全文

学校读者我要写书评

暂无评论

The effect of plasma irradiation on the electrical propertie...

Recent progress of two-dimensional metal-base catalysts in urea oxidation reaction

第十一届新型太阳能材料科学与技术学术研讨会

作者： Congzhi Bi Tianyu wu Jingjing Shao Pengtao Jing hai Xu Jilian Xu Wenxi Guo Yufei Liu da Zhan Department of Physics College of Physical Science and TechnologyResearch Institution for Biomimetics and Soft MatterXiamen University State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences College of Science Beihua University Key Laboratory of Optoelectronic Technology & Systems Chongqing University

Through our experimental research,we have found that plasma irradiation has a significant impact on the electrical properties of tellurium *** with H+ plasma treatment,under a certain intensity of irradiation energy,the conductivity of tellurium nanosheets can be significantly *** speculate that this is due to the irradiation of H plasma producing certain micro/nano tips on the surface of *** has found that the changes in electrical properties depend on the type of plasma *** plasma irradiation does not improve the conductivity of tellurium *** may be due to the fact that argon is a ‘heavier' atom,and its effect on the surface of tellurium nanosheets is more detrimental to the crystal lattice *** conclusions revealed in this work will provide guidance for the related work of plasma irradiation processing of two-dimensional micro and nano *** related work is published in Nanomaterials,2024,14（9）,750.

关键词： Plasma irradiation Tellurium nanosheets 2D devices

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

Rare Metals 2024年第8期43卷 3607-3633页

作者： Qi-Xiang Huang Fang Wang Yong Liu Bi-Ying Zhang Fang-Ya Guo Zhong-Qiu Jia Hao Wang Tian-Xiang Yang hai-Tao wu Feng-Zhang Ren Ting-Feng Yi School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471000China School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery Luoyang 471023China School of Chemistry and Life Sciences Suzhou University of Science and TechnologySuzhou 215009China School of Materials Science and Engineering Northeastern UniversityShenyang110819China

Urea oxidation reaction(UOR)is an auxiliary water electrolysis hydrogen production technology developed in recent years to replace oxygen evolution reaction and reduce energy consumption,which can produce hydrogen more efficiently by low theoretical potential,reduce the average cost of electrochemical hydrogen production,and is a frontier research hotspot for renewable hydrogen ***-dimensional(2D)nanomaterials as electrocatalysts have many favorable potential,such as it can effectively reduce the resistivity of materials and increase the specific surface area with *** paper reviews the application of 2D materials in UOR in alkaline *** a cross-sectional comparison of various material performance data including overpotential,Tafel slope,electrochemical active surface area(ECSA)and it stability test was conducted,which could illustrate the differences between materials composed of different *** addition,the main challenges hindering the progress of research on 2D materials in urea electrocatalysis processes and promising materials in this field in future are summarized and *** is believed that this review will contribute to designing and analyzing highperformance 2D urea electrocatalysts for water splitting.

关键词： Water splitting Urea oxidation reaction Two-dimensional Transition metal compounds Noble/non-noble metals

Endoscopic treatment of extreme esophageal stenosis complicated with esophagotracheal fistula: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2024年第1期16卷 239-247页

作者： Jia-Heng Fang Wei-Min Li Cheng-hai He Jian-Liang wu Yun Guo Zhi-Chao Lai Guo-Dong Li Department of Gastroenterology Hangzhou Normal University Affiliated HospitalHangzhou 310000Zhejiang ProvinceChina

BACKGROUND At present,there is no unified and effective treatment for extreme corrosive esophageal stenosis(CES)with esophagotracheal fistula(ETF).This case had extreme and severe esophageal stenosis(ES)and ETF after ingesting an enzyme-based chemical detergent,resulting in a serious pulmonary infection and severe *** gastrointestinal imaging showed that he had an ETF,and endoscopy showed that he had extreme and severe esophageal *** case was complex and difficult to *** to the domestic and foreign lite-rature,there is no universal treatment that is *** SUMMARY A patient came to our hospital with extreme ES,an ETF,and severe malnutrition complicated with pulmonary tuberculosis 1 mo after the consumption of an enzy-me-based *** ES was serious,and the endoscope was unable to pass through the *** treated him by endoscopic incision method(EIM),esophageal stent placement(ESP),and endoscopic balloon dilation(EBD)by using the bronchoscope and *** treatment not only closed the ETF,but also expanded the esophagus,with minimal trauma,greatly reducing the pain of the *** to the literature,there are no similar reported *** We report,for the first time,a patient with extreme CES complicated with ETF,where the endoscope could not be passed through his esophagus but he could be examined by bronchoscopy and treated by EIM,ESP,and EBD.

关键词： Extreme corrosive esophageal stenosis Esophagotracheal fistula Endoscopic incision method Esophageal stent placement Endoscopic balloon dilation Case report