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Geomorphology-oriented theoretical framework and construction method for value-added DEM

Journal of Geographical Sciences 2024年第1期34卷 165-184页

作者： zhang Haiping TANG guoan XIONG Liyang YANG Xin LI Fayuan Key Laboratory of Virtual Geographic Environment Ministry of EducationNanjing Normal UniversityNanjing 210023China School of Geography Nanjing Normal UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China

Digital elevation model(DEM)plays a fundamental role in the study of the earth system by expressing surface configuration,understanding surface process,and revealing surface mechanism.DEM is widely used in analysis and modeling in the field of geoscience.However,traditional DEM has the defect of single attribute,which is difficult to support the research in earth system science oriented to geoscience process and mechanism mining.Hence,realizing the value-added data model on the basis of traditional DEM is necessary to serve digital elevation modeling and terrain analysis under the background of a new geomorphology research paradigm and earth observation technology.A theoretical framework for value-added DEM that mainly includes concept,connotation,content,and categories,is constructed in this study.The relationship between different types of value-added DEMs as well as the research significance and application category of this theoretical framework are also proposed.The following are different methods of value-added DEMs:(1)value-added methods of DEM space and time dimensions that emphasize the integration of the ground and underground as well as coupling of time and space,(2)attribute-based value-added methods composed of material(including underground,surface,and ground)and morphological properties,and(3)value-added methods of features and physical elements that consider geographical objects and landform features formed by natural processes and artificial effects.The digital terrace,slope,and watershed models are used as examples to illustrate application scenarios of the three kinds of value-added methods.This study aims to improve expression methods of DEMs under the background of new surveying and mapping technologies by adding value to the DEM at three levels of dimensions,attributes,and elements as well as support knowledge-driven digital geomorphological analysis in the era of big data.

关键词： spatial data model value-added DEM digital terrain analysis geomorphological ontology geomorphology

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Payload Symbol-Based Nonlinear RF Fingerprint for Wireless QPSK-OFDM Devices

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China Communications 2023年第6期20卷 240-248页

作者： Honglin Yuan Yan Yan guoan zhang Zhihua Bao School of Information Science and Technology Nantong UniversityNantong 226019China Nantong Research Institute for Advanced Communication Technologies Nantong 226019China

Radio Frequency(RF) fingerprinting is one physical-layer authentication method for wireless communication, which uses the unique hardware characteristic of the transmitter to identify its true identity.To improve the performance of RF Fingerprint(RFF)based on preamble with fixed duration, a nonlinear RF fingerprinting method based on payload symbols is proposed for the wireless OFDM communication with the bit mapping scheme of QPSK. The wireless communication system is modeled as a Hammerstein system containing the nonlinear transmitter and multipath fading channel. A parameter separation technique based on orthogonal polynomial is presented for the estimation of the parameters of the Hammerstein system. The Hammerstein system parameter separation technique is firstly used to estimate the linear parameter with the training signal, which is used to compensate the adverse effect of the linear channel for the demodulation of the successive payload symbols. The demodulated payload symbols are further used to estimate the nonlinear coefficients of the transmitter with the Hammerstein system parameter separation technique again, which is used as the novel RFF for the authentication of the QPSK-OFDM device. Numerical simulations have verified the proposed method, which can also be extended to the OFDM signals with other bit mapping schemes.

关键词： physical-layer authentication RF Fingerprint RF Fingerprinting Hammerstein system parameter separation nonlinearity RFF spectrum sharing

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Gga3 gene-deleted C57BL/6J mice have elevated fasting blood glucose levels

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Genes & Diseases 2023年第6期10卷 2206-2209页

作者： Xiaohong zhang Song Yue Dongjun Jiang guoan zhang Jianli Liu Xuezhi Li Shandong Collaborative Innovation Center for Diagnosis Treatment and Behavioral Interventions of Mental DisordersInstitute of Mental HealthJining Medical UniversityJiningShandong 272013China Shandong Key Laboratory of Behavioral Medicine School of Mental HealthJining Medical UniversityJiningShandong 272013China Department of Pathology Weifang Medical UniversityWeifangShandong 261053China Institute of Forensic Medicine and Laboratory Medicine Jining Medical UniversityForensic Science Center of Jining Medical UniversityJiningShandong 272067China Department of Pathology Affiliated Hospital of Jining Medical UniversityJiningShandong 272000China

Diabetes mellitus(DM)is one of the most common diseases in the elderly,and among DM patients,more than 90%have type 2 DM(T2DM).The etiology of T2DM is complex and associated with risk factors such as age,genetic disposition,and diet.The genetic factors underlying T2DM are currently the focus of intense research,and it has been established that the susceptibility genes associated with T2DM vary among different populations.A recent longitudinal exome-wide association study in the Japanese population has identified GGA3 as a susceptible locus for T2DM.1 GGA3 is one of the Golgi-localized-ear-containing ARF binding proteins(GGAs)that function widely in the transport of Golgi-derived vesicles and in endocytic trafficking pathways.However,although it is widely acknowledged that the control of glucose homeostasis via endocytosis and glucose metabolism plays a vital role in T2DM,the associations between intracellular trafficking and diabetes pathogenesis have not been sufficiently established.In this study,we used a Gga3 gene knockout mouse strain to investigate the potential involvement of GGA3 in controlling blood glucose.The study was approved by the ethics committee of Jining Medical University(No.2019-JS-005).Our results indicate that the GGA3 gene might play a protective role against diabetes.

关键词： metabolism elevated protective

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A Deep Learning Driven Feature Based Steganalysis Approach

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Intelligent Automation & Soft Computing 2023年第8期37卷 2213-2225页

作者： Yuchen Li Baohong Ling Donghui Hu Shuli Zheng guoan zhang College of Computer Science and Information Engineering Hefei University of TechnologyHefei230009China College of Information Engineering Anhui Broadcasting Movie and Television CollegeHefei230011China Department of Informatics Faculty of Natural&Mathematical SciencesKing’s College LondonLondonWC2R2LSUK

The goal of steganalysis is to detect whether the cover carries the secret information which is embedded by steganographic algorithms.The traditional ste-ganalysis detector is trained on the stego images created by a certain type of ste-ganographic algorithm,whose detection performance drops rapidly when it is applied to detect another type of steganographic algorithm.This phenomenon is called as steganographic algorithm mismatch in steganalysis.To resolve this pro-blem,we propose a deep learning driven feature-based approach.An advanced steganalysis neural network is used to extract steganographic features,different pairs of training images embedded with steganographic algorithms can obtain diverse features of each algorithm.Then a multi-classiﬁer implemented as lightgbm is used to predict the matching algorithm.Experimental results on four types of JPEG steganographic algorithms prove that the proposed method can improve the detection accuracy in the scenario of steganographic algorithm mismatch.

关键词： Image steganalysis algorithm mismatch convolutional neural network JPEG images

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Probabilistic Model Checking-Based Survivability Analysis in Vehicle-to-Vehicle Networks

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China Communications 2018年第1期15卷 118-127页

作者： Li Jin guoan zhang Jue Wang School of Electronics and Information Nantong University

Probabilistic model checking has been widely applied to quantitative analysis of stochastic systems, e.g., analyzing the performance, reliability and survivability of computer and communication systems. In this paper, we extend the application of probabilistic model checking to the vehicle to vehicle(V2V) networks. We first develop a continuous-time Markov chain(CTMC) model for the considered V2V network, after that, the PRISM language is adopted to describe the CTMC model, and continuous-time stochastic logic is used to describe the objective survivability properties. In the analysis, two typical failures are considered, namely the node failure and the link failure, respectively induced by external malicious attacks on a target V2V node, and interrupt in a communication link. Considering these failures, their impacts on the network survivability are demonstrated. It is shown that with increasing failure strength, the network survivability is reduced. On the other hand, the network survivability can be improved with increasing repair rate. The proposed probabilistic model checking-based approach can be effectively used in survivability analysis for the V2V networks, moreover, it is anticipated that the approach can be conveniently extended to other networks.

关键词： V2V survivability analysis prob-abilistic model checking PRISM

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试析台湾当局的侨务政策

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台湾研究 2024年第1期 33-39页

作者：张梅黄国安北京科技大学中国政法大学

新中国成立后,海外华侨统一战线为党和国家所高度重视,而在建立此统一战线的进程中,长期以来深受台湾地区当局侨务政策的影响。由于众所周知的原因,台湾地区当局在侨务政策上与我方争锋,中国内地如何应对其侨务政策的袭扰,是建立海外华... 详细信息

新中国成立后,海外华侨统一战线为党和国家所高度重视,而在建立此统一战线的进程中,长期以来深受台湾地区当局侨务政策的影响。由于众所周知的原因,台湾地区当局在侨务政策上与我方争锋,中国内地如何应对其侨务政策的袭扰,是建立海外华侨统一战线的关键一环。由于受历任台湾地区领导人思维模式和政治目的的影响,特别是随着近年来台湾岛内政治氛围的变化,台湾当局的侨务政策发生了根本性的质变,其侨务政策逐渐演变为“台独”分裂势力阴谋分裂祖国的工具。故此,深入了解台湾当局的侨务政策,对于新时代继续加强海外华侨爱国统一战线、深化“反独促统”工作具有重要意义。本文试图梳理历任台湾地区领导人任期内的主要侨务政策,探析台湾当局侨务政策的发展脉络,为在当前形势下应对台湾地区当局侨务政策袭扰提供参考。

关键词：海外华侨爱国统一战线台湾地区当局侨务政策 “侨民三等论” “侨务休兵”

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Use of NOMA for Maritime Communication Networks with P-DF Relaying Channel

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China Communications 2020年第7期17卷 236-246页

作者： Yancheng Ji Xiao zhang guoan zhang Xiaojun Zhu Qiang Sun Wei Duan School of Information Science and Technology Nantong UniversityNantong 220619China

In this paper,a partial decode-and-forward(P-DF)cooperative relaying network(CRN)with non-orthogonal multiple access(P-DF-CRN-NOMA)for maritime space communications is proposed.Without loss of generality,three kinds of relay forwarding protocols are studied to characterize the superiority of the proposed P-DF-CRN-NOMA scheme,where,after receptions from the coastal base station(BS),the island relay forwards the successful decoded symbols to the ship user to avoid the performance loss provided by the high decoding requirement in decode-and-forward(DF).To further improve the system performance,as well as for a fairness comparison,the maximum ratio combining(MRC)is utilized at the ship user.Specifically,to present the impact of the channel qualities,the scenarios of the weak and strong links that from the source to destination(S-D)are both considered.The closed-form expressions for the outage probability of the P-DF-CRN-NOMA are derived considering the three proposed forwarding cases.Qualitative numerical results corroborating our theoretical analysis,especially for the high signalto-noise ratio(SNR),show that the proposed P-DF-CRN-NOMA scheme significantly improves the outage probability performance in comparison to the conventional CRN-NOMA schemes.Furthermore,for an increased S-D link,the corresponding outage probability performance will be also better for all the cases.

关键词： NOMA scheme utilized

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Quantitative Survivability Analysis Using Probability Model Checking: A Study of Cluster-Based Vehicle Networks with Dual Cluster Heads

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China Communications 2020年第2期17卷 206-219页

作者： Li Jin guoan zhang Jue Wang Hao Zhu Wei Duan School of Information Science and Technology Nantong UniversityNantong 226019China Nantong Research Institute for Advanced Communication Technologies Nantong 226019China

As an important part of future 5G wireless networks,a vehicular network demands safety,reliability and connectivity.In this context,networking survivability is usually considered an important metric to evaluate network performance.In this paper,we propose a survivability model for vehicle communication networking based on dual cluster heads,wherein a backup cluster head(CH)will be activated if the primary CH fails,thereby effectively enhancing the network lifetime.Additionally,we introduce a software rejuvenation strategy for the prime CH to further improve the survivability of the entire network.Using the Probabilistic Symbolic Model Checker(PRISM),we verify and discuss the proposed survivability model via numerical simulations.The results show that network survivability can be effectively improved by introducing an additional CH and further enhanced by adopting the software rejuvenation technique.

关键词： cluster head 5G software recovery survivability vehicle networks

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基于MRI数据在体孕期子宫颈三维模型的构建

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中华围产医学杂志 2024年第4期27卷 317-321页

作者：刘强张国安乞文旭中国医科大学附属盛京医院放射科沈阳110004 中国医科大学第七临床学院放射科抚顺113012

目的探讨基于孕期MRI检查的原始数据集采用阈值分割方式构建子宫颈数字化三维模型的方法及意义。方法本研究为前瞻性研究,共招募了2023年6至8月在中国医科大学附属盛京医院进行盆腔MRI检查的12例健康孕妇,包括6例孕中期、6例孕晚期,利... 详细信息

目的探讨基于孕期MRI检查的原始数据集采用阈值分割方式构建子宫颈数字化三维模型的方法及意义。方法本研究为前瞻性研究,共招募了2023年6至8月在中国医科大学附属盛京医院进行盆腔MRI检查的12例健康孕妇,包括6例孕中期、6例孕晚期,利用快速平衡稳态采集序列获得层厚为4 mm、层间距为0 mm的MRI原始数据集,将原始数据集导入Mimics软件中进行子宫颈数字化三维重建,同时测量并比较孕中期与孕晚期孕妇子宫颈长度、直径、前角和后角、内口面积、表面积及体积等各项参数。采用独立样本t检验和Mann-WhitneyU检验进行统计学分析。结果12例孕妇均成功重建孕期子宫颈的数字化三维模型,该模型可以多视角、多平面地观察子宫颈的整体形态和结构,并可对子宫颈进行三维测量。孕中期孕妇的子宫颈长度[(4.15±0.80)与(2.71±0.72)cm]、子宫颈体积[(42.58±9.24)与(28.44±10.18)cm3]和子宫颈长度与直径比值(1.06±0.21与0.72±0.19)明显大于孕晚期(t值分别为3.30、-2.52及-2.98,P值均0.05)。结论基于MRI数据利用阈值分割的三维重建方法可以构建在体孕期子宫颈数字化三维模型,模型能够立体呈现孕期子宫颈的形态学特征,显示不同孕周子宫颈的结构差异,为孕期子宫颈的孕期监测、形态学观察及定量研究提供了新的方法。

关键词：子宫颈磁共振成像数字化三维模型

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A Near Optimal Power Allocation Scheme for Cooperative Relay Networking with NOMA

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China Communications 2019年第3期16卷 122-131页

作者： Haiyang Yu Wei Duan guoan zhang Yancheng Ji Xiaojun Zhu Jaeho Choi The School of Electronics and Information Nantong University Division of Electronics and Information Engineering Chonbuk National University Department of ECE CAIIT Chonbuk National University

In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.

关键词： non-orthogonal multiple access cooperative multi-relay networks decode-and-forward two-stage power allocation

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