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Frontiers in Energy 2020年第1期14卷 127-138页

作者： Wenchi gong Jun SHEN Wei DAI Zeng DENG Xueqiang DONG Maoqiong gong Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance length of laminar flow in superhydrophobic *** investigations were performed for square microchannels with Re ranging between 0.1 and *** is found that superhydrophobic microchannels have a longer hydraulic entrance length than that of conventional ones by nearly 26.62%at a low *** dimensionless hydraulic entrance length slightly increases with the increasing slip length at approximately Re<10,and does not vary with the hydraulic diameter.A new correlation to predict the entrance length in square microchannels with different slip lengths was developed,which has a satisfying predictive performance with a mean absolute relative deviation of 5.69%.The results not only ascertain the flow characteristics of superhydrophobic microchannels,but also suggest that super hydrophobic microchannels have more significant advantages for heat transfer enhancement at a low Re.

关键词： laminar flow hydraulic entrance length super hydrophobic surface slip length hydraulic diameter

Graphene oxide-derived single-atom catalysts for electrochemical energy conversion

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Rare Metals 2022年第5期41卷 1703-1726页

作者： Jian-Bin Liu Hai-Sheng gong gong-Lan Ye Hui-Long Fei State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Sustainable electrochemical energy conversion is considered as a promising solution to energy crises and environmental issues. Owing to their maximized utilization efficiency and excellent catalytic performance, single-atom catalysts(SACs) have obtained tremendous attention in the field of electrochemical energy conversion. In the last few years, graphene oxide(GO) has been considered to be a promising precursor for fabricating graphene-supported SACs due to its advantageous features such as large surface area, high density of intrinsic defects, and scalability. In this review, the recent advances in the preparation of graphene oxide-derived single-atom catalysts(GO-SACs) and their diverse electrochemical applications are ***, the synthetic strategies of GO-SACs are discussed with focuses on the advantages and shortages of each method. Subsequently, the electrochemical applications of GO-SACs in various energy conversion processes,including the oxygen reduction reaction(ORR), oxygen evolution reaction(OER), hydrogen evolution reaction(HER), nitrogen reduction reaction(NRR), and carbon dioxide reduction reaction(CO;RR), are discussed in detail. Finally, the remaining challenges and future prospects in the fabrication and application of GO-SACs are presented.

关键词： Single-atom catalysts Graphene oxide Electrocatalysis Energy conversion

ANALYSIS OF OSCILLATORY BLOOD FLOW IN VARYING-AREA ELASTIC VESSEL

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Journal of Hydrodynamics 2003年第6期15卷 16-24页

作者： gong Ke-qin Biomechanics Laboratory Fudan University Shanghai 200433 Chinae-mail:jxegong 1981

In this paper, by solving the fundamental e-qualions of periodicallyoscillatory blood flow, the distributions of pressure gradient and blood velocity in varying-areae-lastic vessel were obtained, and then the wall shear stress and its gradient were calculated. Asan example, the pulsatile blood flow in human carotid was analyzed and the effects of vessel taperangle on the distribution of wall shear stress and its gradient were discussed in detail. Numercialresults show that the wall shear stress will enlarge when the taper angle increases. Meantime, nomatter whether the vessel is converging or diverging, with the increase of the absolute value oftaper angle, the amplitude of wall shear stress gradient will enlarge significantly.

关键词： elastic vessel shear stress taper angle carotid oscillatory flow

Impacts of Low Salinity Stress on Physiological Responses of the Gill in the Iwagaki Oyster Crassostrea nippona

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Journal of Ocean University of China 2024年第6期23卷 1608-1614页

作者： gong Jianwen LI Qi Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003China

Crassostrea nippona is a valuable species for aquaculture with considerable potential for commercial oyster ***,it is vulnerable to changes in salinity levels in coastal *** this study,we investigated the impacts of low salinity stress on the physiological responses of *** hemolymph osmolality could not reach equilibrium with the surrounding environmental osmolality that was below salinity 15 within 1 *** expansion,cellular valuocation,decrease of gill cilia,increased apoptotic cells under salinity 10 were observed through microscopic *** activities of immunity-related enzymes,including alkaline phosphatase(AKP),acid phosphatase(ACP),superoxide dismutase(SOD),and catalase(CAT),were significantly increased at salinity 10 compared with the control *** findings highlight the vulnerability of *** to low salinity stress and provide insights into the physiological changes in response to fluctuating salinity *** these physiological responses is crucial for effective aquaculture management and developing strategies to mitigate the negative impacts of low salinity stress on *** populations in coastal areas.

关键词： Crassostrea nippona low salinity stress hemolymph osmolality enzyme fine structure

“劳淋病”古代中医药文献记载及现代治疗现状

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陕西中医 2025年第1期46卷 142-144,F0003页

作者：袁港龚学忠上海中医药大学附属市中医医院肾病科上海201401

“劳淋病”常因劳倦而发,迁延不愈,是临床常见难治性疾病,其现代医学病名对应的是复发性尿路感染。现代医学的主流治疗劳淋的抗生素疗法仍存在诸多局限性,中医药疗法历史悠久、潜力巨大、优势显著。本文通过整理中国古代关于淋证的记载... 详细信息

“劳淋病”常因劳倦而发,迁延不愈,是临床常见难治性疾病,其现代医学病名对应的是复发性尿路感染。现代医学的主流治疗劳淋的抗生素疗法仍存在诸多局限性,中医药疗法历史悠久、潜力巨大、优势显著。本文通过整理中国古代关于淋证的记载以及近年来中医药治疗劳淋的相关文献,从历代文献记载、现代医家对于劳淋的认识、中医验方、中医外治法等方面进行概括总结,对未来研究进行展望,以期为劳淋的临床治疗提供些许参考。

关键词：劳淋病复发性尿路感染肾虚湿热辨证论治外治法

Relationship between Atmospheric Heat Source over the Tibetan Plateau and Precipitation in the Sichuan–Chongqing Region during Summer

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Journal of Meteorological Research 2017年第3期31卷 555-566页

作者： Xin LAI Yuanfa gong College of Atmospheric Sciences Chengdu University of Information Technology (CUIT)/Plateau Atmosphere and Environment Key Laboratory of Sichuan Provinceand Joint Laboratory of Climate and Environment Change of CUIT

NCEP-NCAR reanalysis data and a 47-yr daily precipitation dataset from a network of 42 rain gauges are used to analyze the atmospheric heat source （〈Q1〉） anomaly over the Tibetan Plateau （TP） and its influence on the summer precipitation anomaly in the Sichuan-Chongqing region. Results show that the vertical advection of 〈Ql〉 over the central TP is a major factor affecting summer precipitation in the Sichuan-Chongqing region. When the vertical ad- vection of〈Q1〉 over the central TP is strengthened, the South Asian high shifts further than normal to the south and east, the western Pacific subtropical high shifts further than normal to the south and west, and the Indian low weak- ens. This benefits the transport of warm moist air from the low latitude oceans to the Sichuan-Chongqing region. Correspondingly, in the high latitudes, two ridges and one trough form, which lead to cool air moving southward. These two air masses converge over the Sicbuan -chongqing region, leading to significant precipitation. In contrast, when the vertical advection of 〈Q1〉 over the central TP is weakened, the South Asian high moves to the north and west, the subtropical high moves eastward and northward, and the Indian low strengthens. This circulation pattern is unfavorable for warm air advection from the south to the Sichuan-Chongqing region, and the cool air further north cannot move southward because of the presence of two troughs and one ridge at high latitude. Thus, ascent over the Sichuan-Chongqing region is weakened, resulting in less precipitation.

关键词： Tibetan Plateau atmospheric heating source/sink Sichuan-Chongqing region precipitation variability

Precise and efficient Chinese license plate recognition in the real monitoring scene of intelligent transportation system

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The Journal of China Universities of Posts and Telecommunications 2022年第3期29卷 1-14页

作者： Jia Wei gong Chao School of Computer Science and Information Engineering Hefei University of TechnologyHefei 230009China

In this paper, the performance of you only look once(YOLO) series detectors on Chinese license plate recognition(LPR) in the real intelligent transportation system(ITS) monitoring scene is investigated. Specially, a precise and efficient automatic license plate recognition(ALPR) system based on the YOLOv4 detector is proposed. The proposed ALPR system contains three stages including vehicle detection, license plate detection(LPD) and LPR. In vehicle detection stage, YOLOv4 detector is directly applied. In LPD stage, YOLOv4-tiny detector is exploited. In the last stage, the YOLOv4-tiny detector with attention mechanism for LPR is proposed to use. In addition, a large Chinese license plate dataset containing 10 500 images collected from all 31 provinces in the Chinese mainland is created. This Chinese license plate dataset is named Hefei University of Technology license plate version 1(HFUT-LP v1). Particularly, HFUT-LP v1 dataset is collected in the real ITS monitoring scene. In order to compare the performance of different object detection algorithms for ALPR, a variety of object detection algorithms are used to make a comprehensive performance evaluation. Experimental results show that the proposed ALPR system achieves very high accuracy and has very fast processing speed, which is suitable for real-time LPR.

关键词： license plate detection(LPD) license plate recognition(LPR) YOLOv4-tiny detector attention mechanism intelligent transportation

Tunable Negative Poisson’s Ratio in Van der Waals Superlattice

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Research 2021年第1期2021卷 50-60页

作者： Xiaowen Li Xiaobin Qiang Zhenhao gong Yubo Zhang Penglai gong Lang Chen Department of Physics Southern University of Science and TechnologyShenzhenGuangdong 518055China

Negative Poisson’s ratio(NPR)materials are functional and mechanical metamaterials that shrink(expand)longitudinally after being compressed(stretched)*** using first-principles calculations,we found that Poisson’s ratio can be tuned from near zero to negative by different stacking modes in van der Waals(vdW)graphene/hexagonal boron nitride(G/h-BN)*** attribute the NPR effect to the interaction of pz orbitals between the interfacial ***,a parameter calculated by analyzing the electronic band structure,namely,distance-dependent hopping integral,is used to describe the intensity of this *** believe that this mechanism is not only applicable to G/h-BN superlattice but can also explain and predict the NPR effect in other vdW layered ***,the NPR phenomenon,which was relatively rare in 3D and 2D materials,can be realized in the vdW superlattices by different stacking *** combinations of tunable NPRs with the excellent electrical/optical properties of 2D vdW superlattices will pave a novel avenue to a wide range of multifunctional applications.

关键词： stacking hexagonal boron

IMPLICIT DETERMINANT METHOD FOR SOLVING AN HERMITIAN EIGENVALUE OPTIMIZATION PROBLEM

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Journal of Computational Mathematics 2023年第6期41卷 1117-1136页

作者： Siru gong Yangfeng Su School of Mathematical Sciences Fudan UniversityShanghai 200433China

Implicit determinant method is an effective method for some linear eigenvalue optimization problems since it solves linear systems of equations rather than *** this paper,we generalize the implicit determinant method to solve an Hermitian eigenvalue optimization problem for smooth case and non-smooth *** prove that the implicit determinant method converges locally and *** experiments confirm our theoretical results and illustrate the efficiency of implicit determinant method.

关键词： Eigenvalue optimization Multiple eigenvalue Non-smooth optimization Implicit determinant method Crawford number

Thermodynamics of general scalar-tensor theory with non-minimally derivative coupling

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Science China(Physics,Mechanics & Astronomy) 2016年第4期59卷 37-41页

作者： YuMei Huang YunGui gong Institute of Physics and Electric Engineering Mianyang Normal University Department of Astronomy Beijing Normal University School of Physics Huazhong University of Science and Technology

With the usual definitions for the entropy and the temperature associated with the apparent horizon, we discuss the first law of the thermodynamics on the apparent in the general scalar-tensor theory of gravity with the kinetic term of the scalar field nonminimally coupling to Einstein tensor. We show the equivalence between the first law of thermodynamics on the apparent horizon and Friedmann equation for the general models, by using a mass-like function which is equal to the Misner-Sharp mass on the apparent horizon. The results further support the universal relationship between the first law of thermodynamics and Friedmann equation.

关键词： modified gravity thermodynamics derivative coupling cosmology