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A Heat Transport Model Including the Effect of Non-Maxwellian Electron Distribution and Its Application in Laser Produced Plasma

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Chinese Physics Letters 1999年第7期16卷 520-522页

作者： ZHU Shao-ping gu Pei-jun Institute of Applied Physics and Computational Mathematics Beijing 100088

An electron heat transport model is given for studying laser-to-x-ray conversion of inertial confinement *** electron heat flux is derived based on a non-Maxwellian electron distribution,and the behavior of the heat flux is *** effect of the non-Maxwellian electron distribution on inverse bremsstrahlung heating rate and electron-ion heat transfer rate are also included in the present *** simulation results show that the effects of the non-Maxwellian electron distribution on laser absorption efficiency,laser-to-x-ray conversion efficiency and electron temperature in the coronal region are important.

关键词： Maxwell Electron distribution

Multi-constraint quality of service routing algorithm for dynamic topology networks

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Journal of Systems Engineering and Electronics 2008年第1期19卷 58-64页

作者： Wang ping Chen Bingcai gu Xuemai Liu Gongliang Communication Research Center Harbin Inst. of Technology Harbin 150001 P. R. China School of Computer Science and Technology Harbin Engineering Univ. Harbin 150001 P. R. China

An adaptive multi-QoS routing algorithm called AMQRA is proposed for dynamic topology networks, such as satellite networks and Ad-hoc networks. The AMQRA is a distributed and mobile-agents-based routing algorithm, which combines ant quantity system （AQS） with ant colony optimization （ACO） that is used in AntNet routing algorithm. In dynamic topology networks, the AMQRA achieves timely optimization for concave metric QoS constraint and fast convergence. The proposed routing algorithm is simulated in Iridium satellite constellation on OPNET. The results show that AMQRA not only outperforms the AntNet in convergence rate in dynamic topology networks but also can optimize concave metric QoS constraint and reasonably allot bandwidth to the load to avoid networks congestion.

关键词： routing QoS dynamic topology networks

Context Processing in Contextual and Cued Fear Extinction

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Neuroscience Bulletin 2024年第6期40卷 835-839页

作者： Yimu Zhang chun Xu Yu gu State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Brain ScienceFudan UniversityShanghai200032China Institute of Neuroscience State Key Laboratory of NeuroscienceCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China

Anxiety disorders such as post-traumatic stress disorder(PTSD)are prevalent mental disorders that disturb millions *** disorders often manifest as excessive fear,anxiety,and distress,significantly impacting daily *** fear extinction paradigms in animals were established decades ago and have been widely used in research,providing a scientific basis for exposure therapies for anxiety disorders in humans.

关键词： distress disorders traumatic

Interfacial microstructure evolution of 12Cr1MoV/TP347H dissimilar steel welded joints during aging

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International Journal of Minerals,Metallurgy and Materials 2021年第9期28卷 1497-1505页

作者： Yuan Li Yan-ping Zeng Zhi-chun Wang School of Materials Science&Engineering University of Science and Technology BeijingBeijing 100083China North China Electric Power Research Institute Co. Ltd.Beijing 100045China

The interfacial microstructure evolution of 12Cr1MoV/TP347H dissimilar steel welded joints with a nickel-based filler metal during aging was studied in detail to elucidate the mechanism of premature failures of this kind of *** results showed that not only a band of granular Cr_(23)C_(6)carbides were formed along the fusion boundary in the ferritic steel during aging,but also a large number of granular or plate-like Cr_(23)C_(6)carbides,which have a cube-cube orientation relationship with the matrix,were also precipitated on the weld metal side of the fu-sion boundary,making this zone be etched more easily than the other zone and become a dark etched *** faults were found in some Cr_(23)C_(6)*** the as-welded state,deformation twins were observed in the weld metal with a fully austenitic *** peak micro-hardness was shifted from the ferritic steel side to the weld metal side of the fusion boundary after aging and the peak value increased *** on the experimental results,a mechanism of premature failures of the joints was proposed.

关键词： ferritic/austenitic dissimilar steel welded joint interfacial microstructure aging nickel-based filler metal mechanism of premature failures

The progress in the verification of key technologies for floating structures near islands and reefs

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Journal of Hydrodynamics 2021年第1期33卷 1-12页

作者： You-sheng Wu Jun Ding Xue-kang gu chun-yan Ji Xiong-bo Zheng guo-ping Zhou Dao-lin Xu Li Ma China Ship Scientific Research Center Wuxi 214082China School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Shanghai Merchant Ship Design and Research Institute Shanghai 201203China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteQingdao 266000China

In 2019 a Scientific Research&Demonstration Platform was deployed near islands and reefs in South China Sea by a joint research group of 7 institutes and universities in *** is a simplified small model of a two-module semi-submersible-type *** test on site has continued for more than one and half years since then for long-term observations to validate the developed key technologies for design and behavior predictions of floating structures deployed near islands and *** integrated information system was set up to continuously collect and inspect the data of the encountered waves,structure responses,connector forces,mooring line forces,anti-corrosion status of the platform,the performance efficiencies of a floating breakwater nearby and a wave energy converter attached on the *** this paper,the status of the on-site measurements and validations of the key technologies are briefly described.

关键词： near islands and reefs inhomogeneous wave environment multi-module floating structures VLFS floating breakwater wave responses hydroelastic analysis predictions on-site measurements validation verification

Analysis of China's Electricity Price and Electricity Burden of Basic Industries under the Carbon Peak Target before 2030

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 481-491页

作者： Yue Qiu Suyang Zhou Wei gu Xiao-ping Zhang School of Electrical Engineering Southeast UniversityNanjingChina School of Electronic Electrical and System EngineeringUniversity of BirminghamU.K.

The Chinese government is deepening reformation of electricity prices during the 14th Five Year Plan period and has set a carbon emission reduction target of reaching carbon peak before *** this context,will the carbon emission target influence electricity pricing and will electricity price influence competitiveness of Chinese main industries are two questions needing to be *** paper compares China's electricity price level with the selected major countries in the world,and four typical industries are selected to evaluate their electricity burden ***,the correlation between residential electricity price and industrial electricity price and the influencing factors is analyzed,from the perspectives of scale,structure and *** to the model obtained by regression analysis,the electricity price level and corresponding residential and industrial electricity burden in 2025 and 2030 are *** Terms-Electricity burden,industrial electricity price,regression analysis,residential electricity price.

关键词： Electricity burden industrial electricity price regression analysis residential electricity price

Arbitrary-oriented target detection in large scene sar images

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Defence Technology（防务技术） 2020年第4期16卷 933-946页

作者： Zi-shuo Han chun-ping Wang Qiang Fu Shijiazhuang Campus Army Engineering UniversityShijiazhuang050003China

Target detection in the field of synthetic aperture radar(SAR) has attracted considerable attention of researchers in national defense technology worldwide,owing to its unique advantages like high resolution and large scene image acquisition capabilities of ***,due to strong speckle noise and low signal-to-noise ratio,it is difficult to extract representative features of target from SAR images,which greatly inhibits the effectiveness of traditional *** order to address the above problems,a framework called contextual rotation region-based convolutional neural network(RCNN) with multilayer fusion is proposed in this ***,aimed to enable RCNN to perform target detection in large scene SAR images efficiently,maximum sliding strategy is applied to crop the large scene image into a series of sub-images before *** of using the highest-layer output for proposal generation and target detection,fusion feature maps with high resolution and rich semantic information are constructed by multilayer fusion ***,we put forwards rotation anchors to predict the minimum circumscribed rectangle of targets to reduce redundant detection ***,shadow areas serve as contextual features to provide extraneous information for the detector identify and locate targets *** results on the simulated large scene SAR image dataset show that the proposed method achieves a satisfactory performance in large scene SAR target detection.

关键词： Target detection Convolutional neural network Multilayer fusion Context information Synthetic aperture radar

Polyethylenimine (PEI)g-comb-poly(ethylene glycol)-transferrin(I): Tumor-targeted Vector for Gene Delivery In-vitro

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Chinese Chemical Letters 2006年第1期17卷 113-116页

作者： gu ping TANG Zhi Yu WANG College of Life-Science. ZheJiang University Hangzhou 310028 Institute of Materials Research ＆ Engineering Singapore 3 Research Link 117602 The Second Hospital of Zhejiang University Hangzhou 310006

The work described the synthesis and evaluation of PEI-g-comb-PEG-transferrin as a potential system for gene therapy in vitro. The MW of PEG was 10KDa, and PEI was 2KDa. Its structure was identified by NMR, FT-IR and TGA spectroscopy. MTT assay found that at concentration up to 4000 n mol/L of the polymer, cell viability was over 85%. The bio-character of polymer/DNA complex was characterized by agarose gel electrophoresis, ethidium bromide exclusion and zeta-potential assay. The polymer could retardate DNA at N/P ratio 3.0-3.5 （mol/mol）. The particle size of the polymer/DNA complex was less than 300 nm. Transfection efficiency of the complex was studied in COS7 and NT2 cell lines.

关键词： PEI-g-Comb-PEG transferrin gene therapy transfection efficiency.

Optimal Reinsurance and Investment Strategy with Delay in Heston’s SV Model

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Journal of the Operations Research Society of China 2021年第2期9卷 245-271页

作者： chun-Xiang A Ai-Lin gu Yi Shao School of Mathematics and Statistics Zhaoqing UniversityZhaoqing 526061GuangdongChina School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510520China

In this paper,we consider an optimal investment and proportional reinsurance problem with delay,in which the insurer’s surplus process is described by a jump-diffusion *** insurer can buy proportional reinsurance to transfer part of the insurance claims *** addition to reinsurance,she also can invests her surplus in a financial market,which is consisted of a risk-free asset and a risky asset described by Heston’s stochastic volatility(SV)*** the performance-related capital flow,the insurer’s wealth process is modeled by a stochastic differential delay *** insurer’s target is to find the optimal investment and proportional reinsurance strategy to maximize the expected exponential utility of combined terminal *** explicitly derive the optimal strategy and the value ***,we provide some numerical examples to illustrate our results.

关键词： Proportional reinsurance Stochastic differential delay equation(SDDE) Heston’s stochastic volatility(SV)model Hamilton–Jacobi–Bellman(HJB)equation