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A car-following model based on the optimized velocity and its security analysis

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Transportation Safety and Environment 2023年第4期5卷 127-134页

作者： rong fei Lu Yang Xinhong Hei Bo Hu Aimin Li School of Computer Science and Engineering Xi’an University of TechnologyNo.5 Jinhua South RoadXi’an 710048ShaanxiP.R.China Software Design Department Hangzhou Holly Sys Automation Co.Ltd.No.29Jinye 1st RoadXi’an 710065ShaanxiP.R.China

An enhanced optimal velocity model(EOVM)that considers driving safety is established to alleviate traffic congestion and ensure driving safety.Time headway is introduced as a criterion for determining whether the car is safe.When the time headway is less discussed to ensure the model's safety and maintain the following state.A stability analysis of the model was carried out to determine than the minimum time headway(TH_(min))or more than the most comfortable time headway(TH_(com)),the acceleration constraints are the stability conditions of the model.The EOVM is compared with the optimal velocity model(OVM)and fuzzy car-following model using the real dataset.Experiments show that the EOVM model has the smallest error in average,maximum and median with the real dataset.To confirm the model's safety,design fleet simulation experiments were conducted for three actual scenarios of starting,stopping and uniform process.

关键词： optimized velocity constraint optimization security analysis

Clinical Study on Improving Articulation Clarity in Spastic Cerebral Palsy with 120 Cases of Oral-Facial Acupressure Combined with Oral Placement Therapy

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Journal of Clinical and Nursing Research 2024年第5期8卷 30-38页

作者： Yongjie Gong Kai Wu Shan Yang Yalan Yu Xiaobo Zhang fei rong Yuan He First Clinical College of Shaanxi University of Chinese Medicine Xianyang 712000Shaanxi ProvinceChina Xi’an TCM Hospital of Encephalopathy Shaanxi University of Traditional Chinese MedicineXi’an 710032Shaanxi ProvinceChina

Objective:To observe the efficacy of oral-facial acupressure combined with oral placement therapy(OPT)in improving articulation clarity in 120 children with spastic cerebral palsy,and to explore effective therapeutic solutions for speech disorders associated with spastic cerebral palsy.Methods:A total of 120 children with spastic cerebral palsy and speech disorders,meeting the inclusion criteria,were randomly assigned into two groups:60 cases in the treatment group and 60 cases in the control group.The treatment group received orofacial acupressure combined with OPT,while the control group received only OPT.The Oral Motor Function Assessment Scale(OMFAS),developed by the China Rehabilitation Research Centre(CRRC),was used to evaluate the treatment outcomes before and after the intervention.Results:After the treatment,both the treatment and control groups showed improved mobility of the mandible,lips,and tongue.However,the treatment group exhibited significantly better improvement than the control group,with the difference between the two groups being statistically significant(P<0.05).Conclusion:Oral-facial acupressure combined with OPT can effectively improve articulation clarity in children with spastic cerebral palsy.This combined therapy is recommended for clinical promotion and application.

关键词： Oral-facial acupressure Oral placement therapy(OPT) Speech disorders in children with spastic cerebral palsy Speech intelligibility

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郑州市水利基础设施空间布局规划

河南水利与南水北调 2024年第4期53卷 23-25页

作者：荣飞郑州市水利建筑勘测设计院河南郑州450007

随着城市化进程的不断推进,郑州市作为河南省省会、国家级中心城市,面临着水资源利用、水环境保护和城市发展之间的复杂矛盾,水利基础设施空间布局规划对于实现城市可持续发展和提高自然灾害防范能力具有重要意义。因此,通过深入分析郑... 详细信息

随着城市化进程的不断推进,郑州市作为河南省省会、国家级中心城市,面临着水资源利用、水环境保护和城市发展之间的复杂矛盾,水利基础设施空间布局规划对于实现城市可持续发展和提高自然灾害防范能力具有重要意义。因此,通过深入分析郑州市水利基础设施现状和城市发展需求,提出科学合理的空间规划方案是十分必要的。文章首先对郑州市水文基本现状进行介绍,在此基础上,对水利基础设施预留用地划定、水生态保护与修复功能规划以及引用水源建设工程空间规划等进行分析,并结合城市发展规划和水资源利用需求,提出了相应的空间布局规划方案,从而提高城市水利抗灾能力,为构建宜居宜业城市提供有力支撑,为城市水资源利用和环境保护提供科学依据,促进城市的可持续发展。

关键词：郑州市水利基础设施空间布局规划

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基于Nadam-TimeGAN和XGBoost的时序信号故障诊断方法

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通信学报 2024年第4期45卷 185-200页

作者：黑新宏高苗张宽费蓉邱原姬文江西安理工大学计算机科学与工程学院陕西西安710048 陕西省网络计算与安全技术重点实验室陕西西安710048

为了提高故障诊断模型在数据不平衡场景下的诊断性能和模型泛化能力,提出了一种基于Nadam-TimeGAN和XGBoost的时序信号故障诊断方法。首先对比基于LSTM和GRU的TimeGAN模型,选取性能更优的GRU网络作为TimeGAN模型的组成单元,然后采用Nada... 详细信息

为了提高故障诊断模型在数据不平衡场景下的诊断性能和模型泛化能力,提出了一种基于Nadam-TimeGAN和XGBoost的时序信号故障诊断方法。首先对比基于LSTM和GRU的TimeGAN模型,选取性能更优的GRU网络作为TimeGAN模型的组成单元,然后采用Nadam优化算法对TimeGAN模型的各组件进行优化,即构建Nadam-TimeGAN模型用以数据扩充,最后构建一个平衡的数据集输入XGBoost集成学习模型进行分类训练。实验选取转辙机动作电流数据集进行验证性实验,选取MFPT轴承数据集和CWRU轴承数据集进行泛化性实验,并与8种方法进行对比,结果表明,所提方法在准确率、召回率以及F1-score这3种评价指标上均高于其他方法,从而验证了所提方法在不平衡数据故障诊断方面的有效性和泛化性。

关键词：时间序列生成对抗网络 Nesterov加速自适应矩估计极致梯度提升故障诊断数据增强

Motion trajectory prediction based on a CNN-LSTM sequential model

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Science China(Information Sciences) 2020年第11期63卷 248-268页

作者： Guo XIE Anqi SHANGGUAN rong fei Wenjiang JI Weigang MA Xinhong HEI School of Automation and Information Engineering School of Computer Science and EngineeringXi'an University of Technology

Accurate monitoring the surrounding environment is an important research direction in the field of unmanned systems such as bio-robotics, and has attracted much research attention in recent years. The trajectories of surrounding vehicles should be predicted accurately in space and time to realize active defense and running safety of an unmanned system. However, there is uncertainty and uncontrollability in the process of trajectory prediction of surrounding obstacles. In this study, we propose a trajectory prediction method based on a sequential model, that fuses two neural networks of a convolutional neural network(CNN) and a long short-term memory network(LSTM). First, a box plot is used to detect and eliminate abnormal values of vehicle trajectories, and valid trajectory data are obtained. Second, the trajectories of surrounding vehicles are predicted by merging the characteristics of CNN space expansion and LSTM time expansion;the hyper-parameters of the model are optimized according to a grid search algorithm, which satisfies the double-precision prediction requirement in space and time. Finally, data from next generation simulation(NGSIM) and Creteil roundabout in France are taken as test cases; the correctness and rationality of the method are verified by prediction error indicators. Experimental results demonstrate that the proposed CNNLSTM method is more accurate and features a shorter time cost, which meets the prediction requirements and provides an effective method for the safe operation of unmanned systems.

关键词： bio-robots unmanned system outlier detection hyper-parameters trajectory prediction

Preparation of molecularly imprinted microspheres by photo-grafting on supports modified with iniferter

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Chinese Science Bulletin 2006年第21期51卷 2566-2571页

作者： rong fei FENG Xiaogang LI Ping YUAN Chunwei FU Degang State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Bioengineering Department Beijing University of Aeronautics and Astronautics Beijing 100083 China

Molecularly imprinted microspheres (MIMs) of D-mandelic acid were synthesized in this study. Chloromethylated polystyrene beads modified with iniferter were used as supports for photo-grafting of a molecularly imprinted polymer (MIP) layer. The polymers were characterized by FT-IR, elemental analysis and thermo-gravimetric analysis to testify the polymer formation and its thermal stability. Scan- ning electron micrographs (SEM) show that the MIP particles are mono-dispersed and well-spherical, with the average diameter of 4.38 μm and size distribution coefficient of 1.02. Furthermore, the MIMs were packed in a stainless steel column and evaluated as stationary phases in high performance liquid chro- matography (HPLC). The prepared MIP exhibited a considerable capability of chiral separation between template and its enantiomer. Accordingly, this kind of MIP is likely to have wide applications in chemical sensing, chromatographic analysis and solid phase extraction.

关键词： MIMs 聚苯乙烯引发-转移-终止剂照相-移植法生物电子学

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算法商业秘密的秘密性认定标准研究

标准科学 2024年第5期 66-71,78页

作者：萧静彭飞荣中国计量大学法学院

算法作为商业秘密的保护客体已经在实证法上得到了确认,但是算法和其他一般的商业秘密相比存在着特殊性,算法秘密性与算法披露规则存在着一定程度的不兼容性,算法的黑箱性与复杂性使得其秘密性认定存在一定障碍。因此有必要对算法商业... 详细信息

算法作为商业秘密的保护客体已经在实证法上得到了确认,但是算法和其他一般的商业秘密相比存在着特殊性,算法秘密性与算法披露规则存在着一定程度的不兼容性,算法的黑箱性与复杂性使得其秘密性认定存在一定障碍。因此有必要对算法商业秘密的秘密性认定标准进行明确,有效落实对算法的商业秘密保护。本文将考虑到算法的特殊性以及《反不正当竞争法》第三十二条在司法适用上存在的问题,并结合相关案例提出相应的优化路径,明确算法秘密性认定标准,对《反不正当竞争法》第三十二条进行合理解释及具体适用。

关键词：算法商业秘密秘密性标准

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论医疗人工智能伦理标准体系的构建

标准科学 2024年第7期 70-75页

作者：黎燚彭飞荣中国计量大学

随着人工智能在医疗领域的应用日益深入,伴随而来的伦理风险和法律挑战亟需关注。当前医疗人工智能面临失控性、社会性、侵权性、歧视性、责任性等多方面的伦理风险。考虑到专门针对医疗人工智能的法律规制尚处于起步阶段,本文提倡先构... 详细信息

随着人工智能在医疗领域的应用日益深入,伴随而来的伦理风险和法律挑战亟需关注。当前医疗人工智能面临失控性、社会性、侵权性、歧视性、责任性等多方面的伦理风险。考虑到专门针对医疗人工智能的法律规制尚处于起步阶段,本文提倡先构建一套伦理标准体系,以填补当前监管空白,确保技术的健康发展。医疗人工智能伦理标准体系的构建应满足全面性、可操作性、适应性以及普适性与地域性等原则,并优先重点建设伦理原则、数据管理、算法透明、责任界定、监督评估等核心领域的伦理标准。通过促进多方共建、加强国际合作和强化教育培训等配套措施,推进我国医疗人工智能伦理标准体系的建立和完善。

关键词：医疗人工智能伦理风险伦理标准标准构建

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喀什地区耕地土壤养分分析及肥力评价

安徽农业科学 2024年第6期52卷 159-165,184页

作者：周荣飞王海孝喀什地区林果产业工作站新疆喀什844000 喀什地区农业技术推广中心新疆喀什844000

[目的]明确喀什地区各县市耕地土壤养分丰缺分布状况,并对土壤肥力进行系统性评价分析,为喀什地区耕地土壤养分管理及精准施肥提供科学依据,从而提高喀什地区耕地的可生产能力,促进喀什地区农业产业的可持续发展。[方法]2020—2021年在... 详细信息

[目的]明确喀什地区各县市耕地土壤养分丰缺分布状况,并对土壤肥力进行系统性评价分析,为喀什地区耕地土壤养分管理及精准施肥提供科学依据,从而提高喀什地区耕地的可生产能力,促进喀什地区农业产业的可持续发展。[方法]2020—2021年在喀什地区12个行政县市区域采集1 030份耕地土壤样品,分别测定土壤pH、有机质、总氮、碱解氮、有效磷、速效氮、有效铜、有效铁、有效锰、有效锌、有效硼和有效钼含量12个养分指标,通过运用全国第二次土壤普查养分分级标准及土壤综合肥力指数分析法,对耕地土壤肥力实施了全面、系统的评估分析。[结果]喀什地区耕地土壤pH为7.47~8.63,土壤pH偏高,盐碱化现象较为严重;土壤有机质、总氮、碱解氮含量偏低,从各县市区域土壤变异系数来看,土壤中的三者普遍不高,处于中下水平;土壤有效磷和有效钾含量丰富,但土壤变异系数较高,存在分布不均衡现象;耕地土壤中有效铜、有效铁含量在各县市中含量丰富,但仍存在有效铁含量不足的地块;有效锰含量处于中等偏低水平,有效锌和有效硼含量处于中等水平,但土壤样品中的变异系数较高,存在分布不均衡现象;有效钼含量在各县市区域的土壤中含量很低。喀什地区耕地土壤的综合肥力指数为0.406 9~0.623 4,整体均值为0.504 0,喀什地区各县市的耕地土壤肥力均处于中等水平,且各县市区域的土壤肥力差异很小。喀什地区各县市的耕地土壤肥力均呈中等水平,土壤pH含量较高,有机质、总氮和碱解氮含量较低,土壤有效磷、速效钾、有效铁、有效锰、有效锌和有效硼含量存在分布不平衡现象,土壤有效钼含量较低。[结论]各县市应增加有机肥的施入量,进行土壤盐碱化改良,并结合该地的测土施肥结果,开展精准施肥方案,避免造成盲目施肥或者土壤养分不足的现象发生。

关键词：耕地土壤养分土壤肥力评价相关性分析喀什