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基于OCO-2遥感数据的新疆维吾尔自治区大气XCO_(2)空间化研究

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生态环境学报 2024年第2期33卷 231-241页

作者：张杨徐永明卢响军莫亚萍吉蒙祝善友南京信息工程大学遥感与测绘工程学院江苏南京210044 新疆生产建设兵团生态环境第一监测站新疆乌鲁木齐830011

二氧化碳(CO_(2))是导致全球变暖最主要的温室气体,掌握准确的CO_(2)空间分布信息可以有效评估碳减排成效,对于推进碳达峰、碳中和工作具有重要意义。相比站点观测,碳卫星能够获取大尺度的CO_(2)分布信息,但是由于其幅宽较窄以及云覆盖... 详细信息

二氧化碳(CO_(2))是导致全球变暖最主要的温室气体,掌握准确的CO_(2)空间分布信息可以有效评估碳减排成效,对于推进碳达峰、碳中和工作具有重要意义。相比站点观测,碳卫星能够获取大尺度的CO_(2)分布信息,但是由于其幅宽较窄以及云覆盖的影响,大气CO_(2)卫星遥感数据存在大量缺值区域,不能获得空间连续的大气CO_(2)分布。以新疆维吾尔自治区为研究区,基于2019年OCO-2卫星大气二氧化碳柱平均干空气混合比(XCO_(2))数据,结合气温、地形、植被、大气NO_(2)浓度等相关变量,综合对比了多元线性回归(MLR)、地理加权回归(GWR)、支持向量机(SVR)、随机森林(RF)、极端梯度提升树(XGBoost)和极端随机树(ERT)等方法在生成大气XCO_(2)空间连续数据中的表现。交叉验证结果表明,RF、XGBoost和ERT这3种集成学习模型精度明显优于SVR、GWR和MLR模型,其中ERT模型精度最高,决定系数R^(2)为0.748,平均绝对误差σ_(MAE)为0.489×10^(-6)。基于ERT模型生成了新疆2019年逐月大气XCO_(2)空间连续数据,该地区大气XCO_(2)空间差异和季节变化都很明显。在空间分布格局上总体呈现与地形“三山夹两盆”相似的空间分布特征,裸地XCO_(2)年均值最高,林地和草原的XCO_(2)年均值最低;季节变化特征与植被生长周期相似,春冬季浓度较高,夏秋季浓度较低,最高值出现在4月,最低值出现在8月,不同土地覆盖类型的大气XCO_(2)季节变化与全区域类似,其中草原和林地的季节差异最大,裸地季节差异最小。该研究为基于碳卫星遥感数据生成时空连续的大尺度XCO_(2)数据提供了参考和借鉴。

关键词： OCO-2 XCO_(2) 卫星遥感集成学习模型空间化时空分布新疆维吾尔自治区

A nonprofiled side-channel analysis based on variational lower bound related to mutual information

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Science China(Information Sciences) 2023年第1期66卷 277-295页

作者： Chi ZHANG xiangjun lu Pei CAO Dawu GU Zheng GUO Sen XU School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Zhi Xun Crypto Testing and Evaluation Technology Co. Ltd. 3. Viewsource Information Science and Technology Co. Ltd.

In this paper, we attempt to improve the practical performance of the nonprofiled side-channel analysis(Non SCA) with the help of neural networks. We first derive a variational lower bound related to mutual information(VLBRMI) optimized for the context of Non SCA, which possesses a set of adjustable parameters and whose maximum value linearly depends on the mutual information. Then, we propose a new Non SCA method called neural mutual information analysis(NMIA) that exploits the maximum VLBRMI as the distinguisher. We present an estimator of the maximum VLBRMI, which uses neural networks to instantiate the VLBRMI and trains the neural networks to approximate the maximum VLBRMI so that we can implement the NMIA efficiently. Finally, we evaluate the NMIA on several datasets. The experimental results show that NMIA outperforms the correlation power analysis, the mutual information analysis(MIA)based on histograms, the MIA based on kernel density estimation, and the state-of-the-art Non SCA method based on neural networks.

关键词： side-channel analysis nonprofiled method variational lower bound mutual information neural networks

基于5G通信架构的新能源远程集控应急通信方法设计

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信息与电脑 2024年第5期36卷 172-174页

作者：曹磊张瑞韩俊伟闫亮亮卢向军国华(河北)新能源有限公司河北尚义076750

常规的新能源远程集控应急通信节点覆盖区域小,为此提出基于5G通信架构的新能源远程集控应急通信方法设计。先明确能源远程集控通信指标,扩大通信覆盖区域,设定多层级通信节点及数据采集,然后构建5G通信架构能源远程集控应急通信模型,... 详细信息

常规的新能源远程集控应急通信节点覆盖区域小,为此提出基于5G通信架构的新能源远程集控应急通信方法设计。先明确能源远程集控通信指标,扩大通信覆盖区域,设定多层级通信节点及数据采集,然后构建5G通信架构能源远程集控应急通信模型,采用自适应辅助调度实现应急通信处理。测试结果表明:最终得出的应急通信通信时延被较好地控制在0.15 s以下,说明在5G通信架构的辅助与支持下,所设计的应急通信方法更为高效。

关键词： 5G通信架构远程集控应急通信通信方法能源采集

Biomarkers for neuromyelitis optica:a visual analysis of emerging research trends

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Neural Regeneration Research 2024年第12期19卷 2735-2749页

作者： xiangjun Li Jiandong Zhang Siqi Zhang Shengling Shi Yi’an lu Ying Leng Chunyan Li Department of Ophthalmology Affiliated Hospital of Beihua UniversityJilinJilin ProvinceChina Department of Ophthalmology Changchun Bright Eye HospitalChangchunJilin ProvinceChina Departemt of Endocrinology Affiliated Hospital of Beihua UniversityJilinJilin ProvinceChina

Neuromyelitis optica is an inflammatory demyelinating disease of the central nervous system that differs from multiple *** the past 20 years,the search for biomarke rs for neuromyelitis optica has been ***,we used a bibliometric approach to analyze the main research focus in the field of biomarkers for neuromyelitis *** in this area is consistently increasing,with China and the United States leading the way on the number of studies *** Mayo Clinic is a highly reputable institution in the United States,and was identified as the most authoritative institution in this ***,Professor Wingerchuk from the Mayo Clinic was the most authoritative expe rt in this *** analysis revealed that the terms "neuro myelitis optica"(261 times), "multiple sclerosis"(220 times), "neuromyelitis optica spectrum disorder"(132 times), "aquaporin4"(99 times),and "optical neuritis"(87 times) were the most frequently used keywords in literature related to this *** analysis of the classical literature showed that the majority of publications provide conclusive research evidence supporting the use of aquaporin-4-IgG and neuromyelitis optica-IgG to effectively diagnose and differentiate neuromyelitis optica from multiple ***,aquaporin-4-IgG has emerged as a highly specific diagnostic biomarker for neuromyelitis optica spectrum *** oligodendrocyte glycoprotein-IgG is a diagnostic biomarke r for myelin oligodendrocyte glycoprotein antibody-associated *** biomarkers for neuromyelitis optica in clude cerebrospinal fluid immunological biomarkers such as glial fibrillary acidic protein,serum astrocyte damage biomarkers like FAM19A5,serum albumin,and gammaaminobutyric *** latest prospective clinical trials are exploring the potential of these *** results indicate that glial fibrillary acidic protein is emerging as a promising candidate biomarker for neuromyelit

关键词： aquaporin-4 autoantibody multiple sclerosis myelin oligodendrocyte glycoprotein antibody-associated disease neuromyelitis optica neuromyelitis optica spectrum disorder optical coherence tomography

Side channel attack of multiplication in GF(q) –application to secure RSA-CRT

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Science China(Information Sciences) 2019年第3期62卷 202-204页

作者： Sen XU Weija WANG xiangjun lu Zheng GUO Junrong LIU Dawu GU Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai Institute for Advanced Communication and Data Science

Dear editor,In the field of side-channel attacks (SCAs), the security of both block ciphers and public key cryptosystems is widely studied after the seminal differential power analysis (DPA)[1]. The straightforward implementations of both types of cryptographic algorithms are vulnerable to SCAs. The former attack methods are based on a compari-

关键词： RSA Side channel attack of multiplication in GF application to secure RSA-CRT

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Science China(Information Sciences) 2018年第3期61卷 131-147页

作者： Sen XU xiangjun lu Kaiyu ZHANG Yang LI Lei WANG Weijia WANG Haihua GU Zheng GUO Junrong LIU Dawu GU Department of Computer Science and Engineering Shanghai Jiao Tong University College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics

A template attack, the most powerful side-channel attack methods, usually first builds the leakage profiles from a controlled profiling device, and then uses these profiles to recover the secret of the target device. It is based on the fact that the profiling device shares similar leakage characteristics with the target device. In this study, we focus on the similar operations in a single device and propose a new variant of the template attack, called the similar operation template attack(SOTA). SOTA builds the models on public variables(e.g., input/output) and recovers the values of the secret variables that leak similar to the public variables. SOTA’s advantage is that it can avoid the requirement of an additional profiling device. In this study, the proposed SOTA method is applied to a straightforward RSA-CRT implementation. Because the leakage is(almost) the same in similar operations, we reduce the security of RSA-CRT to a hidden multiplier problem(HMP) over GF(q), which can be solved byte-wise using our proposed heuristic algorithm. The effectiveness of our proposed method is verified as an entire prime recovery procedure in a practical leakage scenario.

关键词： side channel attack template attack RSA-CRT hidden number problem prime recovery

To Construct High Level Secure Communication System： CTMI Is Not Enough

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China Communications 2018年第11期15卷 122-137页

作者： Sen Xu xiangjun lu Aidong Chen Haifeng Zhang Haihua Gu Dawu Gu Kaiyu Zhang Zheng Guo Junrong Liu Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Software Engineering Beijing Union University Beijing 100 101 China Wanda Internet Technology Group Shanghai 200127 China Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing China

Public key cryptographic(PKC) algorithms, such as the RSA, elliptic curve digital signature algorithm(ECDSA) etc., are widely used in the secure communication systems, such as OpenSSL, and a variety of information security systems. If designer do not securely implement them, the secret key will be easily extracted by side-channel attacks(SCAs) or combinational SCA thus mitigating the security of the entire communication system. Previous countermeasures of PKC implementations focused on the core part of the algorithms and ignored the modular inversion which is widely used in various PKC schemes. Many researchers believe that instead of straightforward implementation, constant time modular inversion(CTMI) is enough to resist the attack of simple power analysis combined with lattice analysis. However, we find that the CTMI security can be reduced to a hidden t-bit multiplier problem. Based on this feature, we firstly obtain Hamming weight of intermediate data through side-channel leakage. Then, we propose a heuristic algorithm to solve the problem by revealing the secret(partial and full) base of CTMI. Comparing previous nec-essary input message for masking filtering, our procedure need not any information about the secret base of the inversion. To our knowledge, this is the first time for evaluating the practical security of CTMI and experimental results show the fact that CTMI is not enough for high-level secure communication systems.

关键词：安全通讯通讯系统数字签名算法 Hamming OpenSSL 构造公钥密码 tems

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基于OTN的算力网络承载技术研究

长江信息通信 2023年第10期36卷 204-206页

作者：逯向军中国移动通信集团山东有限公司山东济南250001

围绕算力网络承载传输需求,文章探究了OTN技术优势和三大运营商的OTN承载应用,提出了基于OTN的差异化多业务统一承载方案,满足运营商在算力网络应用中差异化多业务承载需求,提高运维效率,降低投资成本。

关键词： OTN 算力网络差异化多业务承载

新疆生产建设兵团生态环境监测网络建设运行及“十四五”优化建议

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环境与发展 2023年第5期35卷 103-108页

作者：卢响军新疆生产建设兵团生态环境第一监测站新疆乌鲁木齐830000

为完善兵团“十四五”生态环境监测网络,从构建新时代生态环境监测体系的角度梳理了兵团生态环境监测网络现状,深入剖析了当前生态环境监测形势、“十四五”初期优化情况和兵团生态环境监测系统存在的问题,并从生态环境监测网络优化调... 详细信息

为完善兵团“十四五”生态环境监测网络,从构建新时代生态环境监测体系的角度梳理了兵团生态环境监测网络现状,深入剖析了当前生态环境监测形势、“十四五”初期优化情况和兵团生态环境监测系统存在的问题,并从生态环境监测网络优化调整、补齐短板、推进科研项目引领示范、完善互联共享体系等方面提出了“十四五”优化建议,使兵团生态环境监测体系与美丽兵团建设相适应。

关键词：生态环境监测网络 “十四五” 新疆生产建设兵团