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Functions of VEGF in female reproductive system

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Chinese Science Bulletin 2003年第3期48卷 217-222页

作者： qiandong ZHUCheng StateKeyLaboratoryofReproductiveBiology InstituteofZoologyChineseAcademyofSciencesBeijing100080China StateKeyLaboratoryofReproductiveBiology InstituteofZoologyChineseAcademyofSciencesBeijing10008

As a homodimeric glycoprotein, vascular en- dothelial growth factor (VEGF) is a highly specific mitogen of vascular endothelial cells. It can induce proliferation and migration, and inhibit apoptosis of endothelial cell. VEGF is involved in many processes in the female reproductive sys-tem, such as ovulation, periodical changes of endometrium, embryo implantation and development. VEGF plays impor-tant roles in some reproductive diseases, including pree-clampsia and fetal hypoevolutism in uterus. Based on our studies on angiogenesis and its relevant factors in the female reproductive system these years, the functions of VEGF in female reproductive system are reviewed, and the research prospect and application of VEGF are also discussed.

关键词： VEGF 血管内皮生长因子受体雌性生殖系统生物学作用血管生成生殖医学

Optimized Deep Learning Model for Fire Semantic Segmentation

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Computers, Materials & Continua 2022年第9期72卷 4999-5013页

作者： Songbin Li Peng Liu qiandong Yan Ruiling Qian Institute of Acoustics Chinese Academy of SciencesBeijing100190China Loughborough University LoughboroughLE113TTUnited Kingdom

Recent convolutional neural networks(CNNs)based deep learning has significantly promoted fire *** fire detection methods can efficiently recognize and locate the ***,the accurate flame boundary and shape information is hard to obtain by them,which makes it difficult to conduct automated fire region analysis,prediction,and early *** this end,we propose a fire semantic segmentation method based on Global Position Guidance(GPG)and Multi-path explicit Edge information Interaction(MEI).Specifically,to solve the problem of local segmentation errors in low-level feature space,a top-down global position guidance module is used to restrain the offset of low-level ***,an MEI module is proposed to explicitly extract and utilize the edge information to refine the coarse fire segmentation *** compare the proposed method with existing advanced semantic segmentation and salient object detection *** results demonstrate that the proposed method achieves 94.1%,93.6%,94.6%,95.3%,and 95.9%Intersection over Union(IoU)on five test sets respectively which outperforms the suboptimal method by a large *** addition,in terms of accuracy,our approach also achieves the best score.

关键词： Fire semantic segmentation local segmentation errors global position guidance multi-path explicit edge information interaction feature fusion

General Steganalysis Method of Compressed Speech Under Different Standards

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Computers, Materials & Continua 2021年第8期68卷 1565-1574页

作者： Peng Liu Songbin Li qiandong Yan Jingang Wang Cheng Zhang Institute of Acoustics Chinese Academy of SciencesBeijing100190China The University of Melbourne MelbourneVIC3010Australia

Analysis-by-synthesis linear predictive coding(AbS-LPC)is widely used in a variety of low-bit-rate speech *** of the current steganalysis methods for AbS-LPC low-bit-rate compressed speech steganography are specifically designed for a specific coding standard or category of steganography methods,and thus lack generalization *** this paper,a general steganalysis method for detecting steganographies in low-bit-rate compressed speech under different standards is ***,the code-element matrices corresponding to different coding standards are concatenated to obtain a synthetic code-element matrix,which will be mapped into an intermediate feature representation by utilizing the pre-trained ***,bidirectional long short-term memory is employed to capture long-term contextual ***,a code-element affinity attention mechanism is used to capture the global inter-frame context,and a full connection structure is used to generate the prediction *** results show that the proposed method is effective and better than the comparison methods for detecting steganographies in cross-standard low-bit-rate compressed speech.

关键词： Cross-standard compressed speech steganalysis attention

Fiber Bragg grating monitors for thermal and stress of the composite insulators in transmission lines

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Global Energy Interconnection 2018年第3期1卷 382-390页

作者： Heming Deng Wei Cai You Song Jinsong Liu Christopher Redman qiandong Zhuang NARI Group (State Grid Electric Power Research Institute) co.ltd State Grid Xinjiang Electric Power Company Physics department Lancaster University

Running composite insulators are prone to failure due to their harsh surrounding work environment, which directly affects the safe operation of transmission lines. This paper puts forward the method of using fiber Bragg grating(FBG) as the monitors to parameters correlated with thermal and stress of the composite insulators in transmission lines at working status. Firstly, monitoring points are found out by the mechanical test on composite insulator samples. Secondly, based on the monitoring theory, this paper introduces the feasibility design frame of the composite insulator with FBG implanted in the rod and the online monitor system. At last, it describes applications of this monitor system in the field of transmission lines.

关键词： Thermal monitoring Stress monitoring Composite insulators Transmission lines Fiber Bragg grating monitors

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Analysis of Existing Problems and Treatment Methods of Urban Environmental Monitoring

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Journal of Environmental Science and Engineering(A) 2022年第2期11卷 49-54页

作者： Zhang qiandong Song Xin Shandong Yantai Ecological Environment Monitoring Center Yantai 264000China Shandong Deep Sea Marine Technology Co. Ltd.Fushan DistrictYantai 265500China

With the rapid development of the city,the concept of ecological environment has been integrated into everyone’s *** the new era,people also have higher requirements for the quality of living ***,at this stage,with the development of urbanization and industrialization,the problem of environmental pollution has become more and more ***,we must do a good job in urban environmental monitoring,pay attention to the protection of urban environment,design and implement effective governance methods,so as to improve the quality of environmental *** article analyzes the problems in urban environmental monitoring,and formulates reasonable treatment methods and suggestions.

关键词： Urban environmental monitoring problems governance methods analysis

The Impact of Urban Renewal on Public Service Facilities in Shenzhen during Inventory Development Stage:An Empirical Analysis of Futian District

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Journal of Landscape Research 2021年第2期13卷 1-6页

作者： DAI qiandong SI Nan School of Urban Planning and Design Peking UniversityShenzhenGuangdong 518055China

As the material carrier of social service industry,public service facilities are important indicators to measure human *** the continuous deepening of inventory development practice,urban renewal has gradually become one of the sources of supply of public service *** on the urban renewal activities of Futian District,Shenzhen from 2010 to 2016,the study conducts an empirical study on the pattern of public service facility networks before and after urban renewal through social network *** fi ndings show that:①on the whole,the public service system in Futian District has been effectively improved during urban renewal development;②the impact of urban renewal on public service system is characterized by differentiation,among which industrial and commercial facilities have been signifi cantly improved,while educational and medical facilities have been hardly improved;③urban renewal has a clear policy orientation as an institutional means,and promoting economic restructuring and industrial reorganization is still the primary purpose of urban renewal during inventory development stage.

关键词： Public service facility Urban renewal Social network analysis Human settlement Futian district Shenzhen

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经典轨迹的鲁棒相似度量算法

电子与信息学报 2020年第8期42卷 1999-2005页

作者：王前东中国电子科技集团公司第十研究所成都610036

针对经典轨迹与实时轨迹之间的大差异性,该文利用最长公共子序列理论,提出一种鲁棒的轨迹相似度量方法。该方法首先利用点到线段之间的距离判断经典轨迹的点与实时轨迹的线段是否一致;然后利用改进的多对1最长公共子序列算法,计算经典... 详细信息

针对经典轨迹与实时轨迹之间的大差异性,该文利用最长公共子序列理论,提出一种鲁棒的轨迹相似度量方法。该方法首先利用点到线段之间的距离判断经典轨迹的点与实时轨迹的线段是否一致;然后利用改进的多对1最长公共子序列算法,计算经典轨迹与实时轨迹之间的最长公共子序列长度;最后将最长公共子序列长度与经典轨迹的点数的比值作为经典轨迹与实时轨迹之间的相似度。实验说明该算法的鲁棒性,该算法能够有效解决经典轨迹与实时轨迹之间的大差异轨迹相似度量问题。

关键词：轨迹相似度量大差异轨迹多对1最长公共子序列鲁棒计算经典轨迹

一种带匹配路径约束的最长公共子序列长度算法

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电子与信息学报 2017年第11期39卷 2615-2619页

作者：王前东中国电子科技集团公司第十研究所成都610036

在带约束的最长公共子序列问题中提出一种特殊的新问题:假设有两序列Q和C,Q中指定的匹配位置序列I,计算两序列Q和C的最长公共子序列,且这个最长公共子序列的匹配路径必须经过位置序列I。针对此问题,该文提出一种带匹配路径约束的最长公... 详细信息

在带约束的最长公共子序列问题中提出一种特殊的新问题:假设有两序列Q和C,Q中指定的匹配位置序列I,计算两序列Q和C的最长公共子序列,且这个最长公共子序列的匹配路径必须经过位置序列I。针对此问题,该文提出一种带匹配路径约束的最长公共子序列算法。首先定义带匹配路径约束的最长公共子序列模型,其次推出该序列的性质,最后求出带匹配路径约束的最长公共子序列长度的基础算法和快速算法。基础算法和快速算法时间复杂度分别为O(mnt)和O(mn),m,n,t分别为序列Q,C,I的长度。

关键词：最长公共子序列匹配路径约束带约束的最长公共子序列带匹配路径约束的最长公共子序列

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经典轨迹的相似度量快速算法

系统工程与电子技术 2020年第10期42卷 2189-2196页

作者：王前东中国电子科技集团公司第十研究所四川成都610036

针对经典轨迹相似度量的耗时性,利用轨迹压缩算法,提出一种基于最长公共子序列(longest common subsequence,LCS)的相似度量快速算法。首先,对实时轨迹进行压缩,减少轨迹点数。然后,利用经典轨迹的点与实时轨迹线段之间的距离,根据改进... 详细信息

针对经典轨迹相似度量的耗时性,利用轨迹压缩算法,提出一种基于最长公共子序列(longest common subsequence,LCS)的相似度量快速算法。首先,对实时轨迹进行压缩,减少轨迹点数。然后,利用经典轨迹的点与实时轨迹线段之间的距离,根据改进的多对1 LCS长度公式,计算经典轨迹与实时轨迹之间的LCS长度。最后,将LCS长度与经典轨迹的点数的比值作为经典轨迹的相似度。实验说明,通过轨迹压缩能够减少60%以上的计算时间。

关键词：最长公共子序列轨迹相似度量轨迹压缩快速计算经典轨迹