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Real-time localization for underwater equipment using an extremely low frequency electric field

Defence Technology（防务技术） 2023年第8期26卷 203-212页

作者： Jia-wei Zhang peng yu Run-xiang Jiang Tao-tao Xie College of Weapon Engineering Naval University of EngineeringWuhan430033China Weaponry Department Naval Petty Officer AcademyBengbu233012China College of Electric Engineering Naval University of EngineeringWuhan430033China

A new real-time underwater equipment location method adopting an electric field induced by a standard current source is *** goals were real-time tracking and location of stationary or moving underwater equipment both in shallow and deep seas,under noisy *** main features of this method are as follows:(1)a standard current source on the water surface,which can be towed by a vehicle,consisting of two electrodes,a signal generator,and a GPS unit;(2)measurement of the extremely low frequency(ELF)electric field emitted by the current source,made possible by electric field sensors on the underwater equipment;(3)position of the underwater equipment is estimated in real time based on a progressive update extended Kalman filter(PUEKF),which is carried out using the propagation model of an ELF electric field because the electric field at the position of the underwater equipment and the current source position are *** verified the accuracy of our method and confirmed real-time location feasibility through numerical,physical scale,and real-time sea *** numerical experiments,we verified that our method works for underwater equipment location in real-world conditions,and the location error can be less than 0.2 ***,real-time location experiments for stationary underwater measuring equipment in water tank were *** result shows that the location error can be less than 0.1 *** also confirmed real-time location feasibility through the use of offshore *** expect that our method will complement conventional underwater acoustic location methods for underwater equipment in acoustically noisy environments.

关键词： Termsd Real-time tracking and location method Underwater equipment location ELF electric field Shallow sea Physical scale experiment Sea experiment

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Decoding epigenetic codes: new frontiers in exploring recovery from spinal cord injury

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Neural Regeneration Research 2020年第9期15卷 1613-1622页

作者： Bo-Yin Zhang peng-yu Chang Qing-San Zhu yu-Hang Zhu Saijilafu Department of Orthopedic Surgery China-Japan Union Hospital of Jilin UniversityChangchunJilin ProvinceChina Department of Radiotherapy The First Bethune Hospital of Jilin UniversityChangchunJilin ProvinceChina Department of Orthopedics The First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina

Spinal cord injury that results in severe neurological disability is often *** poor clinical outcome of spinal cord injury is mainly caused by the failure to reconstruct the injured neural *** intrinsic and extrinsic determinants contribute to this inability to *** regulation acts as the driving force for multiple pathological and physiological processes in the central nervous system by modulating the expression of certain critical *** studies have demonstrated that post-SCI alteration of epigenetic landmarks is strongly associated with axon regeneration,glial activation and *** findings not only establish a theoretical foundation for further exploration of spinal cord injury,but also provide new avenues for the clinical treatment of spinal cord *** review focuses on the epigenetic regulation in axon regeneration and secondary spinal cord ***,these discoveries are a selection of epigenetic-based prognosis biomarkers and attractive therapeutic targets in the treatment of spinal cord injury.

关键词： axon regeneration epigenetic biomarkers epigenetic modification histone microRNA prognosis secondary injury spinal cord injury

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A one-pot protocol for copper-mediated azide–alkyne cycloaddition using alkenyl triflate precursors

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Chinese Chemical Letters 2019年第1期30卷 269-270页

作者： yu Chen Lianchao Liu Dimin Wu yu-peng He Ang Li College of Chemistry Chemical Engineering and Environmental Engineering Liaoning Shihua University State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic ChemistryChinese Academy of Sciences

On the basis of the mild transformation of alkenyl triflates into alkynes promoted by LiCl, a one-pot protocol using alkenyl triflate precursors was developed for copper-mediated azide–alkyne cycloaddition. This protocol may provide an opportunity of sequentially click reactions for the construction of bifunctional probes in chemical biology studies.

关键词： Click chemistry Azide-alkyne cycloaddition Alkenyl triflates Lithium chloride

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Dispersion characteristics of seabed Scholte waves with variable velocity seawater in deep water

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Applied Geophysics 2022年第4期19卷 537-552,604页

作者： Jiang Jia-Meng yu peng-Fei College of Oceanography Hohai UniversityNanjing 210024China

Acoustic velocity varies in deep-water *** obtain accurate inversion interpretations,it is necessary to develop a horizontally layered seawater–seabed(HLSS)model with continuously varying *** this work,we used an HLSS model based on wave theory to deduce the Scholte wave dispersion equations and established an HLSS model based on the acoustic velocity profile and the submarine medium parameters of the South China *** studied the dispersion characteristics of Scholte waves and theoretically calculated the amplitude–depth *** also examined the influence of deep-water environments on the dispersion characteristics of Scholte *** the real geological parameters of the Dongsha Islands in the South China Sea,we exploited the spectral element method to simulate seismic wave propagation in the fluid–solid interface and extracted the Scholte wave dispersion curves using multichannel analysis of surface waves(MASW).The consistent theoretical and extracted dispersion curve results verified the accuracy of our *** experiments showed that the dispersion characteristics of Scholte waves in deep water are weaker than those in shallow *** addition to the seawater depth and the physical parameters of seabed sediments,the seawater’s variable velocity also influences Scholte wave dispersion characteristics.

关键词： Scholte waves variable-velocity seawater dispersion characteristics amplitudedepth distribution.

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Metastasis to the thyroid gland from primary breast cancer presenting as diffuse goiter:A case report and review of literature

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World Journal of Clinical Cases 2022年第3期10卷 1106-1115页

作者： Wen Wen Heng Jiang Hsin-yu Wen yu-Lan peng Department of Ultrasound West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina College of Medicine University of Nebraska Medical CenterOmahaNE 68133United States Department of Pathology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Metastasis to the thyroid gland(TM)from primary breast cancer is uncommon and usually presents as thyroid nodules;however,diffuse goiter without thyroid nodules is the first sign of TM in rare *** metastases(SMs)to the lymph nodes in breast cancer,defined as discontiguous higher-level metastases in the absence of lower levels of contiguous metastases,have been reported in the contralateral cervical area of the primary tumor site in rare *** SUMMARY A 49-year-old previously healthy Chinese woman was diagnosed with right lateral invasive ductal carcinoma and underwent neoadjuvant chemotherapy treatment and bilateral mastectomy with axillary lymph node *** malignancy of the left breast or axillary or distant metastases were identified ***,enlarged left cervical lymph nodes were detected 36 mo after surgery,and rapidly enlarging thyroid glands without nodules were detected 42 mo after ***-needle aspiration cytology was performed on the left cervical lymph nodes and left lobe of the thyroid,which were both revealed to contain metastases from the primary breast ***,the immunostaining profiles changed in the process of *** patient was discharged with the NP(vinorelbine and cisplatin)regimen for subsequent treatment,and stable disease was determined when the curative effect was *** Diffuse goiter may be the first sign of TM,and enlarged lymph nodes in the contralateral cervical area may be SMs of primary breast cancer.

关键词： Metastases to the thyroid gland Diffuse goiter Cervical lymph node recurrence Breast cancer Case report

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Lie Symmetrical Non-Noether Conserved Quantities of Poincaré-Chetaev Equations

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Communications in Theoretical Physics 2005年第2X期44卷 223-225页

作者： ZHANG peng-yu FANG Jian-Hui College of Physics and Technology China University of Petroleum Dongying 257061 China

In the present paper the Lie symmetrical non-Noether conserved quantity of the Poincaré-Chetaev equations under the general infinitesimal transformations of Lie groups is discussed. First, we establish the determining equations of Lie symmetry of the equations. Second, the Lie symmetrical non-Noether conserved quantity of the equations is deduced.

关键词： Poincaré-Chetaev equations Lie symmetry non-Noether conserved quantity

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Transcriptomic and cellular decoding of scaffolds-induced suture mesenchyme regeneration

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International Journal of Oral Science 2024年第2期16卷 306-321页

作者： Jiayi Wu Feifei Li peng yu Changhao yu Chuyi Han Yitian Wang Fanyuan yu Ling Ye State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&West China Hospital of Stomatology Sichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Cariology and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Pediatric Dentistry West China Hospital of StomatologySichuan UniversityChengduChina

Precise orchestration of cell fate determination underlies the success of scaffold-based skeletal *** extensive studies on mineralized parenchymal tissue rebuilding,regenerating and maintaining undifferentiated mesenchyme within calvarial bone remain very challenging with limited advances *** knowledge has evidenced the indispensability of rebuilding suture mesenchymal stem cell niches to avoid severe brain or even systematic *** to date,the absence of promising therapeutic biomaterials/scaffolds *** reason lies in the shortage of fundamental knowledge and methodological evidence to understand the cellular fate regulations of *** address these issues,in this study,we systematically investigated the cellular fate determinations and transcriptomic mechanisms by distinct types of commonly used calvarial *** data elucidated the natural processes without scaffold transplantation and demonstrated how different scaffolds altered in vivo cellular responses.A feasible scaffold,polylactic acid electrospinning membrane(PLA),was next identified to precisely control mesenchymal ingrowth and self-renewal to rebuild non-osteogenic suture-like tissue at the defect center,meanwhile supporting proper osteointegration with defect bony ***,transcriptome analysis and cellular mechanisms underlying the well-orchestrated cell fate determination of PLA were *** study for the first time cellularly decoded the fate regulations of scaffolds in suture-bony composite defect healing,offering clinicians potential choices for regenerating such complicated injuries.

关键词： injuries healing suture

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Genetic diversity and structure of the endemic and endangered species Aristolochia delavayi growing along the Jinsha River

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Plant Diversity 2021年第3期43卷 225-233页

作者： yu-Long yu Hui-Chun Wang Zhi-Xiang yu Johann Schinnerl Rong Tang yu-peng Geng Gao Chen School of Ecology and Environmental Science Yunnan UniversityKunming650091China yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of SciencesKunming650201China University of Chinese Academy of Sciences Beijing100049China Sichuan Panzhihua Cycas National Nature Reserver Bureau Panzhihua617000China Department of Botany and Biodiversity Research University of ViennaRennweg 14A-1030ViennaAustria CAS Key Laboratory for Plant Biodiversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650201China

The traditional medicinal plant,and endangered species Aristolochia delavayi(Aristolochiaceae)is an endemic species in China and occurs in the warm and dry areas along the Jinsha *** is also a specific host of the larvae of Byasa daemonius,a vulnerable *** this study,15 pairs of polymorphic microsatellite primers of *** were designed and screened based on the Simple Sequence Repeats(SSR)loci found by using the results of genome *** on these 15 SSR markers,the genetic diversity and structure of 193 individuals from ten natural populations were analyzed in *** comparison to other endemic and endangered plants in the region,the population of *** possess a relatively high genetic diversity(He=0.550,I=1.112).AMOVA analysis showed that 68.4%of the total genetic diversity was within populations and 31.6%of the variation occurred among *** was a significant genetic differentiation among natural populations of *** detectable,with low gene flow(Nm=0.591).This might be attributed to geographical barriers and limited seed *** test the isolation by distance(IBD),we performed Mantel test,which showed a significant correlation between the geographic and genetic *** order to cope with the possible biases caused by IBD,we additionally performed Bayesian genetic cluster analyses and principal coordinate analysis(PCoA).The final cluster analysis revealed three groups with distinct geographical *** fragmentation and limited gene flow between these populations may be the main reasons for the current genetic *** conservation of this species,we suggest to divide its populations into three protection management units,with subsequent focus on the Yongsheng and Luquan populations which experienced a genetic bottleneck event in the past.

关键词： Aristolochia delavayi Conservation biology Genetic diversity Genetic structure Microsatellites Genome skimming

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Synthesis of Nano-Crystalline Diamond Film in Hot Filament Chemical Vapour Deposition by Adding Ar

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Chinese Physics Letters 2001年第2期18卷 286-288页

作者： ZHANG yu-Feng ZHANG Fan GAO Qiao-Jun yu Da-peng peng Xiao-Fu LIN Zeng-Dong Department of Physics Peking UniversityBeijing 100871 Beijing Institute of Powder Metallurgy Beijing 100078

Nano-crystalline diamond films are successfully deposited on silicon substrates via the hot filament chemical vapour deposition process using a CH_(4)/H_(2)/Ar gas *** as-grown films are analysed by using field emission scanning electron microscopy,micro-Raman spectroscopy and x-ray *** results show that the films consist of nano-diamond grains with sizes ranging from 10 to 100 nm,and argon is an important element in the formation of nano-crystalline diamonds.

关键词： crystalline films vapour

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The α-Geometric Structures on Manifold of Positive Definite Hermite Matrices

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Acta Mathematica Sinica,English Series 2014年第12期30卷 2137-2145页

作者： Xiao Min DUAN Hua Fei SUN Lin yu peng Department of Mathematics Beijing Institute of Technology School of Science Dalian Jiaotong University Department of Mathematics University of SurreyGuildfordSurrey GU2 7XHUK

Geometric structures of a manifold of positive definite Hermite matrices are considered from the viewpoint of information geometry.A Riemannian metric is defined and dual α-connections are *** the fact that the manifold is ±l-flat is ***,the divergence of two points on the manifold is given through dual potential ***,the optimal approximation of a point onto the submanifold is ***,some simulations are given to illustrate our results.

关键词： Positive definite Hermite matrices information geometry optimal approximation

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