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Potential field based hole detour routing algorithm in wireless sensor networks

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High Technology Letters 2011年第2期17卷 119-125页

作者：李凤荣 Li Lei hu Maolin Key Laboratory of Wireless Sensor Network ＆ Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 P. R. China

The current geographic routing protocols arise data congestion if a multi-flow bypasses a hole simultaneously and excessive energy consumption of hole boundary nodes because these protocols tend to route data packets along the boundaries of void areas （holes） by perimeter routing *** scheme possibly enlarges the holes phenomenon （called hole diffusion problem） and shortens the life span of the network. A novel geographical routing algorithm based on a potential field approach （PFA） is proposed to deal with multiple holes scenario and restrict data to forward near boundary of a hole. That is, data packets are attracted to its sink and are repulsed away from the hole （s）. Simulation results show that PFA is superior to other protocols in terms of packet delivery ratio, network lifetime.

关键词： geographic routing perimeter routing scheme hole diffusion potential field network lifetime

“Sparking”and“Igniting”Key Publications of 2020 Nobel Prize Laureates

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Journal of Data and Information Science 2021年第2期6卷 28-40页

作者： Fangjie Xil Ronald Rousseau Xiaojun hu Medical Information Center Zhejiang University School of MedicineHangzhou 310058China Faculty of Social Sciences University of AntwerpMiddelheimlaan 22020 AntwerpenBelgium Centre for R&D Monitoring(ECOOM)and Dept.MSI KU LeuvenNaamsestraat 613000 LeuvenBelgium Department of Neurology of Affiliated Hospital 2 Zhejiang University School of MedicineHangzhou 310009China

Purpose:This article aims to determine the percentage of"Sparking"articles among the work of this year’s Nobel Prize winners in medicine,physics,and ***/methodology/approach:We focus on under-cited influential research among the key publications as mentioned by the Nobel Prize Committee for the 2020 Noble Prize ***,we extracted data from the Web of Science,and calculated the Sparking Indices using the formulas as proposed by hu and Rousseau in 2016 and *** addition,we identified another type of igniting articles based on the notion in ***:In the fields of medicine and physics,the proportions of articles with sparking characteristics share 78.571%and 68.75%respectively,yet,in chemistry 90%articles characterized by"igniting".Moreover,the two types of articles share more than 93%in the work of the Nobel Prize included in this *** limitations:Our research did not cover the impact of topic,socio-political,and author’s reputation on the Sparking *** implications:Our study shows that the Sparking Indices truly reflect influence of the best research work,so it can be used to detect under-cited influential articles,as well as identifying fundamental ***/value:Our findings suggest that the Sparking Indices have good applicability for research evaluation.

关键词： Sparking Indices Sparking fundamental research Igniting fundamental research Nobel Prize laureates Under-cited influential research

Multiple-Step Predictive Control for Offshore Structures

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China Ocean Engineering 1999年第3期14卷 231-246页

作者：李华军 Sau-Lon JAMES hu College of Engrg. Ocean University of Qingdao Professor Member of ASCEDepartment of Ocean EngrgUniversity of Rhode IslandNarragansett

Ocean wave propagation is slow, visible and measurable, so a wave theory can be used to approximately predict the imminnent wave force on an offshore structure based on measured, real-time wave elevation near the structure. This predictability suggests the development of a more efficient algorithm, than those that have been developed for structures under wind and seismic loads, for the active vibration control of offshore structures. The present study delveops a mutiple-step predictive optimal control (MPOC) algorithm that accounts for multiple step external loading in the determination of optimal control forces. The control efficiency of the newly developed MPOC algorithm has been Investigated under both regular (single-frequency) and irregular (multiple-frequency) wave loads, and compared with that of two other well-known optimal control algorithms: classical linear optimal control(CLOC) and instantaneous optimal control(IOC).

关键词： active control offshore structure predictive control control algorithm wave load vibration

Numerical study of equilibrium solutions for axisymmetric plasmas with toroidal flow obtained using Solovev approach

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Plasma Science and Technology 2019年第5期21卷 79-92页

作者： Yemin hu M S Zhu Wenfeng GUO Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Center for Magnetic Fusion Theory Chinese Academy of SciencesHefei 230031People's Republic of China

Solovev approach of finding equilibrium solutions,which was extended to include the vacuum solutions provided by Zheng,Wooton,and Solano,was found extremely useful for the purpose of shaping *** extension to toroidal equilibria with a general plasma flow was examined theoretically in a companion paper by Chu,hu and *** only meaningful extension was found for plasmas with a pure toroidal rotation and with a constant Mach number.A set of functions{SOLOVEV_ZWSm}was obtained which fixed location of the magnetic axis for equilibria with quasi-constant current density profile,with toroidal flow at constant Mach number and with specific heat capacity *** set{Solovev_ZWSm}should have complete shaping capability for plasma shapes with positive curvature at the boundary;but not for plasmas with negative curvature boundary points,*** doublets or bean shaped *** report here extensive numerical studies showing the shaping capability of{Solovev_ZWSm}for plasmas with pure toroidal rotations,including the change in topology of the solution when the rotation mach number *** plasma topology are the sphere(spheromaks);and the tokamaks(including the doublets).

关键词： Solovev approach toroidal flow linear-superposable equilibria

Link between Arctic ozone and the stratospheric polar vortex

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Atmospheric and Oceanic Science Letters 2023年第1期16卷 47-52页

作者： Dingzhu hu Simin Shi Zhe Wang Key Laboratory of Meteorological Disasters of China Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science&TechnologyNanjingChina College of Atmospheric Sciences Lanzhou UniversityLanzhouChina

利用1980-2020年MERRA-2资料,分析了平流层极涡(Stratospheric polar vortex,SPV)和北极臭氧(Arctic strato-spheric ozone,ASO)的关系,评估了与SPV相关的化学,动力过程在其中的相对作用,结果表明,3月份ASO与同期SPV强度反相关最大.SPV-ASO二者反相关与平流层剩余环流(Brewer-Dobson circulation,BDC)变化密切相关.强SPV伴随的北极平流层低温条件和行星波向上传播减弱,导致BDC减弱,减弱的BDC下沉支将低纬度平流层上层臭氧含量较低的空气输送到北极平流层低层,从而导致ASO减少.BDC垂直速度在其中起主导作用.

关键词：臭氧平流层极涡剩余环流北极年际变化

Beta-adrenergic agonist protects retinal pigment epithelium against hydroxycholoroquine toxicity via c AMP-PKA signal pathway

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International Journal of Ophthalmology(English edition) 2020年第4期13卷 552-559页

作者： Ruihua Zhang Dan-Ning hu Richard Rosen Eye and Vision Research Institute Department of OphthalmologyIcahn School of Medicine at Mount SinaiNew York 10029USA Department of Ophthalmology New York Eye and Ear Infirmary of Mount SinaiNew York 10003USA

AIM: To test our hypothesis that activation of protein kinase A(PKA) signal pathway by β-adrenergic agonist plays an important role in the protecting of cultured retinal pigment epithelial(RPE) cells against the hydroxychloroquine(HCQ) toxicity. METHODS: Cultured human RPE cells were treated with 1) HCQ, 2) HCQ with salbutamol(a β2-adrenergic receptor agonist), and 3) HCQ with salbutamol and a PKA inhibitor, and compared these to 4) untreated cells(controls). After treated for 24 h, cell vacuolation, cells viability, PKA and PKA kinase activity levels were determined by the measurement of the size of vacuoles using Image J software, the cell counting with a dye-exclusion testing, Western blot and PKA kinase detection, respectively. RESULTS: Cell vacuolation and cell death of cultured RPE cells were significantly increased by the treatment of HCQ. Salbutamol significantly elevated PKA and PKA activity levels and this was associated with the inhibition of the vacuolation and cell death. The PKA inhibitor significantly decreased the PKA levels and eliminated the protective effects of salbutamol on HCQ-treated RPE cells. CONCLUSION: The PKA pathway plays an important role in the protective effects of β2-adrenergic agonist on the RPE cells against HCQ toxicity. These findings reveal a novel potential strategy against HCQ retinopathy by treatment with PKA activating medications.

关键词： hydroxycholoroquine retinal pigment epithelial cells retinopathy protein kinase A vacuolation

Multi-sensor federated unscented Kalman filtering algorithm in intermittent observations

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High Technology Letters 2015年第2期21卷 132-139页

作者：胡振涛 hu Yumei Li Song Institute of Image Processing and Pattern Recognition Henan University College of Computer and Information Engineering Henan University

Aiming at the adverse effect caused by limited detecting probability of sensors on filtering preci- sion of a nonlinear system state, a novel muhi-sensor federated unscented Kalman filtering algorithm is proposed. Firstly, combined with the residual detection strategy, effective observations are cor- rectly identified. Secondly, according to the missing characteristic of observations and the structural feature of unscented Kalman filter, the iterative process of the single-sensor unscented Kalman filter in intermittent observations is given. The key idea is that the state estimation and its error covariance matrix are replaced by the state one-step prediction and its error covariance matrix, when the phe- nomenon of observations missing occurs. Finally, based on the realization mechanism of federated filter, a new fusion framework of state estimation from each local node is designed. And the filtering precision of system state is improved further by the effective management of observations missing and the rational utilization of redundancy and complementary information among multi-sensor observa- tions. The theory analysis and simulation results show the feasibility and effectiveness of the pro- posed algorithm.

关键词： nonlinear estimation intermittent observations unscented Kalman filter federated filter

Synchronous multiple primary malignancies of the esophagus, stomach, and jejunum: A case report

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World Journal of Clinical Cases 2021年第32期9卷 9889-9895页

作者： Yan Li Lian-Song Ye Bing hu Department of Gastroenterology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Treatment of synchronous multiple primary malignancies is quite often very ***,we report on a rare case of synchronous multiple primary malignancies in the esophagus,stomach,and *** SUMMARY A 50-year-old man who was a heavy drinker and smoker with a poor diet,and had a family history of cancer sought treatment due to dysphagia lasting for 4 *** was finally diagnosed with lower esophageal squamous cell carcinoma(pT3N2M0,G2,stage IIIB),gastric angular adenocarcinoma(pT3N2M0,G2-G3,stage IIIA)with greater omental lymph node metastasis,and jejunal stromal tumor(high risk).The high-risk jejunal stromal tumor was found during *** spite of radical resection and adjuvant chemotherapy,lymph node metastasis occurred 21 mo *** patient responded poorly to additional chemotherapy and refused further examination and *** died of widespread metastases 33 mo after *** This case indicates a poor prognosis of synchronous multiple advanced primary malignancies and the importance of comprehensive assessment in the population at high risk for cancer.

关键词： Multiple primary malignancies Gastrointestinal tract Diagnosis Treatment Case report

Sea-surface reflection-aided underwater localization with unknown sound speed

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Science China(Information Sciences) 2019年第4期62卷 209-211页

作者： Bingbing ZHANG Yongchang hu Hongyi WANG Zhaowen ZhuANG School of Electronic Science National University of Defense Technology Xi'an Research Center Cloud Core Network Product Line/R&D Mgmt Huawei Technologies Co. Ltd

Dear editor,The problem of underwater localization has drawn considerable attention in recent years [1]. However, it is quite challenging due to a lack of measurements and the unknown sound propagation speed(SPS), eve... 详细信息

关键词： Sea-surface reflection-aided underwater localization with unknown sound speed