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Efficient Finite Difference/Spectral Method for the Time Fractional Ito Equation Using Fast Fourier Transform Technic

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Communications on Applied Mathematics and Computation 2023年第4期5卷 1591-1600页

作者： Dakang Cen zhibo wang Seakweng Vong School of Mathematics and Statistics Guangdong University of TechnologyGuangzhou510006GuangdongChina Department of Mathematics University of MacaoMacaoChina

A finite difference/spectral scheme is proposed for the time fractional Ito *** mass conservation and stability of the numerical solution are deduced by the energy method in the L^(2)norm *** reduce the computation costs,the fast Fourier transform technic is applied to a pair of equivalent coupled differential *** effectiveness of the proposed algorithm is verified by the first numerical *** mass conservation property and stability statement are confirmed by two other numerical examples.

关键词： Time fractional Ito equation Finite difference method Spectral method Stability

Dynamic Behavior of Two Part Towing Cable System During Turning

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Journal of Shanghai Jiaotong university(Science) 2018年第3期23卷 444-455页

作者： GAO Hui wang zhibo Jiangsu University of Science and Technology Zhangjiagang 215600 Jiangsu China Shanghai Ship and Shipping Research Institute Shanghai 200135 China

An improved numerical method is used to simulate the dynamic behavior of a two part towing cable systems during turnings. In U turns and full turns, periodical heave motions are found both for the towed vehicle and for the depressor. Periodic motions of the subsea units and of the cable surface tension are closely related to the turning parameters, such as turning velocity and turning radius. System parameters, such as length of the second cable and the vehicle bydrodynamics, also damp turning instability.

关键词： towing cable systems dynamic behavior periodic motion turning operation

Distributed power allocation with a novel signaling in dense OFDMA small cell networks

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The Journal of China Universities of Posts and Telecommunications 2015年第3期22卷 1-8页

作者： wang Meng Tian Hui Nie Gaofeng wang zhibo Liu Yang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

A distributed power allocation scheme was presented to maximize the system capacity in dense small cell networks. A new signaling called inter-cell-signal to interference plus noise ratio （ISINR） as well as its modification was defined to show the algebraic properties of the system capacity. With the help of ISINR, we have an easy way to identify the local monotonicity of the system capacity. Then on each subchannel in iteration, we divide the small cell evolved node B＇s （SeNBs） into different subsets. For the first subset, the sum rate is convex with respect to the power domain and the power optimally was allocated. On the other hand, for the second subset, the sum rate is monotone decreasing and the SeNBs would abandon the subchannel in this iteration. The two strategies are applied iteratively to improve the system capacity. Simulations show that the proposed scheme can achieve much larger system capacity than the conventional ones. The scheme can achieve a promising tradeoffbetween performance and signaling overhead.

关键词： power allocation dense small cells Inter-cell-signal to interference plus noise ratio orthogonal frequency division multiple access

A survey on barrier coverage with sensors

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Frontiers of Computer Science 2016年第6期10卷 968-984页

作者： Fan WU Yang GUI zhibo wang Xiaofeng GAO Guihai CHEN Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Computer Wuhan University Wuhan 430072 China

For various applications, sensors are deployed to monitor belt regions to guarantee that every movement crossing a barrier of sensors will be detected in real-time with high accuracy and minimize the need for human support. The bartier coverage problem is introduced to model these requirements, and has been examined thoroughly in the past decades. In this survey, we state the problem definitions and systematically consider sensing models, design issues and challenges in barrier coverage problem. We also review representative algorithms in this survey. Furthermore, we provide discussions on some extensions and variants of barrier coverage problems.

关键词： sensor network barrier coverage

Towards Task-Free Privacy-Preserving Data Collection

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China Communications 2022年第7期19卷 310-323页

作者： zhibo wang Wei Yuan Xiaoyi Pang Jingxin Li Huajie Shao School of Cyber Science and Engineering Wuhan University430072 China School of Cyber Science and Technology Zhejiang University310027 China State Key Laboratory of Integrated Services Networks Xidian University710071 China Department of Computer Science College of William and MaryWilliamsburgVA23186 USA

With the rapid developments of Internet of Things(IoT)and proliferation of embedded devices,large volume of personal data are collected,which however,might carry massive private information about attributes that users do not want to *** privacy-preserving methods have been proposed to prevent privacy leakage by perturbing raw data or extracting task-oriented features at local ***,they would suffer from significant privacy leakage and accuracy drop when applied to other tasks as they are designed and optimized for predefined *** this paper,we propose a novel task-free privacy-preserving data collection method via adversarial representation learning,called TF-ARL,to protect private attributes specified by users while maintaining data utility for unknown downstream *** this end,we first propose a privacy adversarial learning mechanism(PAL)to protect private attributes by optimizing the feature extractor to maximize the adversary’s prediction uncertainty on private attributes,and then design a conditional decoding mechanism(ConDec)to maintain data utility for downstream tasks by minimizing the conditional reconstruction error from the sanitized *** the joint learning of PAL and ConDec,we can learn a privacy-aware feature extractor where the sanitized features maintain the discriminative information except *** experimental results on real-world datasets demonstrate the effectiveness of TF-ARL.

关键词： IoT privacy protection data collection adversarial learning deep learning

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一种新型压配式腰椎椎间融合器的机械性能

中国组织工程研究 2025年第21期29卷 4492-4498页

作者：李世文于长水刘启王智博刘禹良祁全哈尔滨医科大学附属第一医院黑龙江省哈尔滨市150000

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型... 详细信息

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型腰椎融合器YP-cage的机械强度特性进行初步评估。方法:对不同尺寸9,11,13 mm高度的新型YP-cage(n=9)和聚醚醚酮-cage(n=9)进行了静态轴向压缩实验和静态轴向扭转实验,分别采集力-位移曲线计算屈服位移及载荷、极限载荷位移及刚度,屈服角位移及扭矩、极限载荷角位移扭矩及刚度,并进行对比分析。结果与结论:(1)在静态轴向压缩测试中,YP-cage在3组测试中(9,11,13 mm),其刚度、屈服载荷、极限位移和载荷极限方面均优于聚醚醚酮-cage(P <0.01),但YP-cage的屈服位移小于聚醚醚酮-cage(P <0.05);(2)在静态扭转测试中,除了9 mm组的YP-cage和聚醚醚酮-cage在极限扭转角度上差异无显著性意义,YP-cage在屈服扭矩、屈服扭转角度及极限扭矩均小于聚醚醚酮-cage(P <0.01),而YP-cage扭转刚度在9 mm组和11 mm组大于聚醚醚酮-ccage(P <0.01);(3)结果表明新型压配式机械结构椎间融合器相较于聚醚醚酮材质cage具有更高的抗压强度,但抗扭强度不如聚醚醚酮-cage。

关键词：椎间融合装置经孔椎体间融合术脊柱融合机械性能物理性质

Synthesis,Style Editing,and Animation of 3D Cartoon Face

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Tsinghua Science and Technology 2024年第2期29卷 506-516页

作者： Ming Guo Feng Xu Shunfei wang zhibo wang Ming Lu Xiufen Cui Xiao Ling School of Software and BNRist Tsinghua UniversityBeijing 100084China Department of Multimedia and Smart Guangdong OPPO Mobile Telecommunications Corp.Ltd.Dongguan 523860China Intel Labs IntelBeijing 100089China

As a popular kind of stylized face,cartoon faces have rich application *** is challenging to create personalized 3D cartoon faces directly from 2D real ***,in order to adapt to more application scenarios,automatic style editing,and animation of cartoon faces is also a crucial problem that is urgently needed to be solved in the industry,but has not yet had a perfect *** solve this problem,we first propose“3D face cartoonizer”,which can generate high-quality 3D cartoon faces with texture when fed into 2D facial *** contribute the first 3D cartoon face hybrid dataset and a new training strategy which first pretrains our network with low-quality triplets in a reconstruction-then-generation manner,and then finetunes it with high-quality triplets in an adversarial manner to fully leverage the hybrid ***,we implement style editing for 3D cartoon faces based on k-means,which can be easily achieved without retrain the neural *** addition,we propose a new cartoon faces'blendshape generation method,and based on this,realize the expression animation of 3D cartoon faces,enabling more practical *** dataset and code will be released for future research.

关键词： cartoon 3D face animation computer graphics

Neospastis camellia ***,***.(Lepidoptera:Xyloryctidae),a replacement name of *** in China

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Zoological Systematics 2021年第4期46卷 323-327页

作者： Zhulin Tao zhibo wang Qiang Xiao Shuxia wang College of Life Sciences Nankai UniversityTianjin 300071China Institute of Tea Research Chinese Academy of Agricultural SciencesHangzhou 310008China

A species of the family Xyloryctidae,Neospastis camellia ***,***.,is described as a replacement name of *** ***.,with the descriptions of its larva and pupa and the biological *** pest is feeding on the leaves of tea ... 详细信息

关键词： Microlepidoptera Gelechioidea taxonomy nomenclature

CRISPR/Cas9-mediated mutagenesis at microhomologous regions of human mitochondrial genome

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Science China(Life Sciences) 2021年第9期64卷 1463-1472页

作者： Bang wang Xiujuan Lv Yufei wang zhibo wang Qi Liu Bin Lu Yong Liu Feng Gu School of Ophthalmology and Optometry Eye HospitalState Key Laboratory of OphthalmologyOptometry and Vision ScienceMinistry of Health and Zhejiang Provincial Key Laboratory of Ophthalmology and OptometryWenzhou Medical UniversityWenzhou 325027China Department of Endocrinology&Metabolism Shanghai Tenth People’s HospitalTongji UniversityShanghai 200092China Attardi Institute of Mitochondrial Biomedicine School of Laboratory Medicine and Life SciencesWenzhou Medical UniversityWenzhou 325035China

Genetic manipulation of mitochondrial DNA(mtDNA)could be harnessed for deciphering the gene function of mitochondria;it also acts as a promising approach for the therapeutic correction of pathogenic mutation in ***,there is still a lack of direct evidence showing the edited mutagenesis within human mtDNA by clustered regularly interspaced short palindromic repeats-associated protein 9(CRISPR/Cas9).Here,using engineered CRISPR/Cas9,we observed numerous insertion/deletion(InDel)events at several mtDNA microhomologous regions,which were triggered specifically by double-strand break(DSB)lesions within *** mutagenesis was significantly improved by sgRNA multiplexing and a DSB repair inhibitor,iniparib,demonstrating the evidence of rewiring DSB repair status to manipulate mtDNA using CRISPR/*** findings would provide novel insights into mtDNA mutagenesis and mitochondrial gene therapy for diseases involving pathogenic mtDNA.

关键词： mtDNA CRSIPR/Cas9 genome editing microhomologous region