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Chinese Journal of Electronics 2024年第1期33卷 128-138页

作者： Jinxue PENG Yong WANG Jingfeng XUE zhenyan liu School of Computer Science and Technology Beijing Institute of Technology

Cross-platform binary code similarity detection aims at detecting whether two or more pieces of binary code are similar or not. Existing approaches that combine control flow graphs(CFGs)-based function representation and graph convolutional network(GCN)-based similarity analysis are the best-performing ones. Due to a large amount of convolutional computation and the loss of structural information, the use of convolution networks will inevitably bring problems such as high overhead and sometimes inaccuracy. To address these issues, we propose a fast cross-platform binary code similarity detection framework that takes advantage of natural language processing(NLP)and inductive graph neural network(GNN) for basic blocks embedding and function representation respectively by simulating extracting structural features and temporal features. GNN’s node-centric and small batch is a suitable training way for large CFGs, it can greatly reduce computational overhead. Various NLP basic block embedding models and GNNs are evaluated. Experimental results show that the scheme with long short term memory(LSTM)for basic blocks embedding and inductive learning-based Graph SAGE(GAE) for function representation outperforms the state-of-the-art works. In our framework, we can take only 45% overhead. Improve efficiency significantly with a small performance trade-off.

关键词： Training Semantics Process control Binary codes Feature extraction Natural language processing Graph neural networks

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一种高效的软件模糊测试种子生成方法

西安电子科技大学学报 2024年第2期51卷 126-136页

作者：刘振岩张华刘勇杨立波王梦迪北京邮电大学网络与交换技术国家重点实验室北京100876 青岛科技大学信息科学技术学院山东青岛266061 国网河北省电力有限公司河北石家庄050000 国网河北省电力有限公司信息通信分公司河北石家庄050000

模糊测试技术作为当前软件工程领域用于挖掘漏洞的有效方式之一,其在发现软件潜在漏洞方面有着非常显著的效果。针对传统模糊测试技术中种子选择策略无法快速有效地生成高质量的种子集,导致变异生成的测试用例无法到达更深路径、触发更... 详细信息

模糊测试技术作为当前软件工程领域用于挖掘漏洞的有效方式之一,其在发现软件潜在漏洞方面有着非常显著的效果。针对传统模糊测试技术中种子选择策略无法快速有效地生成高质量的种子集,导致变异生成的测试用例无法到达更深路径、触发更多安全漏洞的问题,基于改进生成对抗网络(GAN)提出了一个种子生成方法以实现高效模糊测试。通过优化LeakGAN网络结构提高生成种子的质量和多样性,引入编解码技术实现灵活扩展生成种子的类型,并显著提高了在不同输入格式下目标程序的模糊测试性能。实验结果表明,采取的种子生成策略在覆盖率、触发唯一崩溃等指标上有明显提升,并有效地提高了种子生成速度。文中选择了6个具有不同高度结构化输入的开源程序和不同的模糊测试工具来验证策略的有效性,相较原策略分支覆盖率平均增长约2.79%,并且多发现了约10.35%的唯一路径以及约86.92%的唯一崩溃。

关键词：漏洞挖掘网络安全模糊测试深度学习

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子痫前期产妇24h动态血压监测结果与不同妊娠结局之间的相关性研究

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科技与健康 2024年第1期3卷 21-24页

作者：谭玉冰邹穗怡康娇仪刘振燕广东医科大学附属第三医院·佛山市顺德区龙江医院广东佛山528318

探讨子痫前期(preeclampsia,PE)产妇24h动态血压监测(ambulatory blood pressure monitoring,ABPM)结果与不同妊娠结局之间的相关性。选取2020年2月—2021年1月广东医科大学附属第三医院收治的80例PE产妇为研究对象,将产妇分为对照组和... 详细信息

探讨子痫前期(preeclampsia,PE)产妇24h动态血压监测(ambulatory blood pressure monitoring,ABPM)结果与不同妊娠结局之间的相关性。选取2020年2月—2021年1月广东医科大学附属第三医院收治的80例PE产妇为研究对象,将产妇分为对照组和试验组,每组各40例。对照组未出现APO(adverse pregnancy outcomes,APO),试验组出现APO,比较两组产妇的血压参数、血压负荷值和血压昼夜波动节律。结果显示,试验组产妇dSBP、dDBP、nSBP、nDBP、24h SBP、24h DBP显著高于对照组产妇(P<0.05);试验组产妇dDBPL、dSBPL、nDBPL、nSBPL显著高于对照组产妇(P<0.05);试验组产妇夜间收缩压下降率、夜间舒张压下降率、夜间血压下降率显著高于对照组产妇(P<0.05)。研究发现,对PE产妇实施24hABPM,对评估不同妊娠结局有较高的临床价值。

关键词：子痫前期动态血压监测不良妊娠结局血压负荷值

An Asymmetric Galactic Stellar Disk Traced by OB-type Stars from LAMOST DR7

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Research in Astronomy and Astrophysics 2024年第6期24卷 38-51页

作者： Xiaopeng liu Hao Tian Wenyuan Cui Linlin Li Jiaming liu zhenyan Huo Yawei Gao Department of Physics Hebei Normal UniversityShijiazhuang 050024China Guo Shoujing Institute for Astronomy Hebei Normal UniversityShijiazhuang 050024China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China

Using 9943 OB-type stars from LAMOST DR7 in the solar neighborhood,we fit the vertical stellar density profile with the model including a single exponential distribution at different positions(R,Φ).The distributions of the scale heights and scale length show that the young disk traced by the OB-type stars is not *** scale length decreases versus the azimuthal angleΦ,i.e.,from.■kpc withΦ=-3°to■kpc withΦ=9°.Meanwhile we find signal of non-symmetry in the distribution of the scale height of the north and south of the disk *** scale height in the north side shows signal of flaring of the disk,while that of the south disk stays almost constant around h_(s)=130 *** distribution of the displaceeent of the disk plane Z_(0)also shows variance versus the azimuthal angleΦ,which displays significant differences with the warp model constrained by the Cepheid *** also test different values for the position of the Sun,and the distance between the Sun and the Galactic center affects the scale heights and the displacement of the disk significantly,but that does not change our conclusion that the disk is not axisymmetric.

关键词： Galaxy:disk galaxies:spiral stars:early-type stars:massive

Groundwater Quality and Vulnerability Assessment in a Semiarid Karst Region of Northern China

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Journal of Earth Science 2024年第1期35卷 313-316页

作者： Ran An Shu Wang Zongjun Gao zhenyan Wang Wei Li Qijun Deng Lü Lin Yuanqing liu Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Shandong University of Science and Technology Qingdao 266510China Center for Hydrogeology and Environmental Geology Survey China Geological SurveyBaoding 071051China

Groundwater plays a critical role in maintaining ecological balance and ensuring social operations,especially in arid and semiarid regions(Hu et al.,2023;Han et al.,2022;Ma et al.,2014).The over-exploitation of groundwater,coupled with the influx of pollutants from human activities into the soil,significantly degrades the environment in certain regions(Jia et al.,2019;Famiglietti,2014;Giordano,2009;Konikow and Kendy,2005;Bohlke,2002;Shah et al.,2000).

关键词： groundwater Groundwater Vul

Spatial interpolation of soil nutrients using algebra hyper-curve neural network

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International Journal of Agricultural and Biological Engineering 2008年第1期1卷 51-56页

作者： Chen Liping Zhao Chunjiang Huang Wenqian Chen Tian’en Wang Jihua liu zhenyan Hu Jing National Engineering Research Center for Information Technology in Agriculture Beijing 100097China Department of Software Engineering College of SoftwareBeijing Institute of TechnologyBeijing 100081China

Spatial distribution of and interpolation methods for soil nutrients are the basis of soil nutrient management in precision *** study of application potential and characteristics of algebra hyper-curve neural network(AHCNN)in delineating spatial variability and interpolation of soil properties,956 soil samples were taken from a 50 hectare field with 20 m interval for alkaline hydrolytic nitrogen *** test data set consisted of 100 random samples extracted from the 956 samples,and the training data set extracted from the remaining samples using 20,40,60,80,100 and 120 m grid *** the AHCNN model,three training plans were designed,including plan AHC1,using spatial coordinates as the only network input,plan AHC2,adding information of four neighboring points as network input,and plan AHC3,adding information of six neighboring points as network *** interpolation precision of AHCNN method was compared with that of Kriging *** the number of training samples was big,interpolation precisions of Kriging and AHCNN were *** the number of training samples was small,the precisions of both methods *** AHCNN method has no request on data distribution and it is non-linearization of neutron input variables,it is suitable for delineation of spatial distribution of nonlinear soil *** addition,AHCNN has an advantage of adaptive self-adjustment of model parameters,which makes it proper for soil nutrient spatial *** comparison of mean absolute error d,root mean squared error RMSE,and mean relative error%d,and the spatial distribution maps generated from different methods,it can be concluded that using spatial coordinates as the only network input cannot simulate the characteristics of soil nutrient spatial variability well,and the simulation results can be improved greatly after adding neighboring sample points’information and the distance effect as network *** the number of samples wa

关键词： algebra hyper-curve neural network(AHCNN) spatial interpolation soil nutrients spatial variability Kriging interpolation

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高校开展生态文明教育的意义与途径

北京师范大学学报:自然科学版 2023年第4期59卷 674-679页

作者：李诺刘真言刘月美廖万金北京师范大学生命科学学院北京100875

人与自然和谐共生的中国式现代化是我国新时代生态文明建设的战略任务.生态文明是人类发展新阶段,生态文明建设势在必行,其中生态文明教育对于助推生态文明建设具有极其重要的意义.高校在开展生态文明教育工作时,应基于生态文明素养提... 详细信息

人与自然和谐共生的中国式现代化是我国新时代生态文明建设的战略任务.生态文明是人类发展新阶段,生态文明建设势在必行,其中生态文明教育对于助推生态文明建设具有极其重要的意义.高校在开展生态文明教育工作时,应基于生态文明素养提升的目标设置课程维度,架构生态文明教育课程体系,并建构生态文明教育活动开展所需的环境条件与评价体系.为完善高校生态文明教育建设工作,未来应着重界定学生生态文明素养内涵,促成生态文明教育学段贯通,并开发有效的生态文明素养评价工具,为我国生态文明建设目标的达成提供帮助.

关键词：生态文明建设生态文明教育生态文明素养课程建设

基于热图和聚类分析黑龙江7个产地紫苏梗中氨基酸含量及其营养评价

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中国食品添加剂 2023年第10期34卷 1-8页

作者：刘振艳张微宋耀新齐齐哈尔医学院科研处齐齐哈尔161006 齐齐哈尔医学院人事处齐齐哈尔161006

以黑龙江7个种植区紫苏梗为研究对象,通过氨基酸比值系数法、主成分分析和聚类热图分析等方法进行营养评价。结果表明,7个种植区紫苏梗中至少含有17种氨基酸,总氨基酸含量介于(1.610±0.075)~(4.665±0.082)g/100 g;鲜味氨基酸、甜味氨... 详细信息

以黑龙江7个种植区紫苏梗为研究对象,通过氨基酸比值系数法、主成分分析和聚类热图分析等方法进行营养评价。结果表明,7个种植区紫苏梗中至少含有17种氨基酸,总氨基酸含量介于(1.610±0.075)~(4.665±0.082)g/100 g;鲜味氨基酸、甜味氨基酸、苦味氨基酸和芳香族氨基酸的含量分别占总氨基酸含量的30.69%~32.41%、36.33%~39.45%、25.50%~28.28%和9.05%~9.44%;第一限制氨基酸为蛋氨酸+胱氨酸;必需氨基酸/总氨基酸含量与必需氨基酸/非必需氨基酸含量的百分比分别35.77%~37.86%和50.88%~55.73%,氨基酸评分系数在65.3~74.3;聚类热图按照氨基酸含量将7个种植区的紫苏梗划分为3大类;利用主成分分析构建了2个主成分,建立了综合评价模型,综合排名前2位的紫苏梗产地为伊春嘉荫和牡丹江东宁。

关键词：紫苏梗氨基酸主成分分析综合评价聚类分析热图

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Experimental　and　Numerical　Investigation　of　Enhancement　of　Heat　and　Mass　Transfer　in　Adsorbent　Beds

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Journal of Thermal Science 1994年第3期3卷 187-190页

作者： liu zhenyan Fu Zhuman Ge Xinshi Su Yuehong Wang Yongtang (Department of Thermal Science and Energy Engineering, University of Science and Technology of China,Hefei, Anhui, 230026, China) Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei China

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ＥｘｐｅｒｉｍｅｎｔａｌａｎｄＮｕｍｅｒｉｃａｌＩｎｖｅｓｔｉｇａｔｉｏｎｏｆＥｎｈａｎｃｅｍｅｎｔｏｆＨｅａｔａｎｄＭａｓｓＴｒａｎｓｆｅｒｉｎＡｄｓｏｒｂｅｎｔＢｅｄｓＬｉｕＺｈｅｎｙａｎ；ＦｕＺｈｕｍａｎ；ＧｅＸｉｎｓｈｉ；ＳｕＹｕｅｈｏｎｇ；...

关键词：热传导质量传输吸附床

黄河下游典型滩区土壤重金属污染特征及来源解析

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农业工程学报 2023年第15期39卷 200-207页

作者：徐祖奔伍艳赵越乔奥克冯帅滔刘振延黄河水利委员会黄河水利科学研究院郑州450003 水利部堤防安全与病害防治工程技术研究中心郑州450003 河南黄科工程技术检测有限公司郑州450003

针对黄河滩区土壤重金属污染、来源复杂的问题,该研究以原阳滩区复合污染土壤为例,结合土壤重金属含量空间分布和正定矩阵因子分解(positive matrix factorization,PMF)模型,探讨滩区土壤重金属富集特征及来源。源解析结果表明,原阳滩... 详细信息

针对黄河滩区土壤重金属污染、来源复杂的问题,该研究以原阳滩区复合污染土壤为例,结合土壤重金属含量空间分布和正定矩阵因子分解(positive matrix factorization,PMF)模型,探讨滩区土壤重金属富集特征及来源。源解析结果表明,原阳滩区土壤重金属污染受工业源、交通源、自然来源、燃煤污染源和农业源影响,农业源占主导,相对贡献率达23.5%,其次为工业源、自然来源、交通源、和燃煤污染源。该研究能够准确解析多金属复合土壤复杂成因,可为黄河滩区多金属复合污染土壤的污染源识别提供参考。

关键词：重金属风险评价正定矩阵因子分解法源解析黄河滩区