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基于集成学习的风沙跃移轨迹自动识别模型

中国沙漠 2024年第6期44卷 70-78页

作者：周虹吉梅凡民蒲梦洁林川苏进陈金广西安工程大学环境与化学工程学院陕西西安710600 西安工程大学理学院陕西西安710600 西安工程大学计算机科学学院陕西西安710600

为了发展风沙跃移轨迹追踪算法,需要建立自动识别跃移轨迹方法来代替人工识别方法。本文利用自建的跃移轨迹数据集,发展了4个优化的集成学习模型(极度随机树、随机森林、梯度提升决策树和XGBoost)以实现跃移轨迹的自动识别。结果表明:... 详细信息

为了发展风沙跃移轨迹追踪算法,需要建立自动识别跃移轨迹方法来代替人工识别方法。本文利用自建的跃移轨迹数据集,发展了4个优化的集成学习模型(极度随机树、随机森林、梯度提升决策树和XGBoost)以实现跃移轨迹的自动识别。结果表明:上述模型都能够较好地实现跃移轨迹的自动分类,反映了集成学习模型在解决这类非线性问题时的独特优势;在研究的模型中,极度随机树模型具有最高的准确率(0.9035)、精确度(0.9030)、召回率(0.9035)、F1分数(0.8995)、MCC(0.7378)、AUC分数(0.9179)和最高的时间成本;XGBoost模型具有较好的预测分数和较低时间成本;前者适合用于离线跃移轨迹的自动识别而后者具有在线追踪风沙颗粒的潜力;添加瞬时水平和垂直速度的方差等参数化方案不但可优化数据集,且能进一步提升极度随机树模型的预测性能。

关键词：风沙跃移极度随机树 XGBoost 随机森林梯度提升决策树

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基于遗传算法的钢水“脱氧合金化”成本优化研究

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河南科技 2019年第16期38卷 32-34页

作者：苏庆周泓机邹立志重庆邮电大学

随着钢铁行业中高附加值钢种产量的不断提高,在保证钢铁质量的同时尽可能减少成本尤为重要。本文基于低碳钢HRB400B的历史数据记录,构建BP神经网络-脱氧合金化预测模型。根据16种合金原料的元素含量和单价,建立“脱氧合金化”总成本最... 详细信息

随着钢铁行业中高附加值钢种产量的不断提高,在保证钢铁质量的同时尽可能减少成本尤为重要。本文基于低碳钢HRB400B的历史数据记录,构建BP神经网络-脱氧合金化预测模型。根据16种合金原料的元素含量和单价,建立“脱氧合金化”总成本最优化模型,并采用遗传算法进行求解。结果显示,相同成本的不同方案中,各合金原料的用量可能存在较大差别,故应根据炼钢厂的实际情况确定合理的合金配料方案。

关键词：多元回归 BP神经网络遗传算法目标约束模型

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瓦斯水合物诱导时间影响因素实验研究

黑龙江科技大学学报 2016年第2期26卷 122-127页

作者：张保勇刘金华周泓吉黑龙江科技大学安全工程学院哈尔滨150022 黑龙江科技大学瓦斯等烃气输运管网安全基础研究国家级专业中心实验室哈尔滨150022

为探究多因素条件下瓦斯水合物诱导时间及其规律,利用自主设计的高压可视水合实验装置,由成核动力学实验确定了气体组分、NaCl质量分数及驱动力三种因素对瓦斯水合物诱导时间影响的程度,采用极差法和方差法对实验数据进行分析。结果表明... 详细信息

为探究多因素条件下瓦斯水合物诱导时间及其规律,利用自主设计的高压可视水合实验装置,由成核动力学实验确定了气体组分、NaCl质量分数及驱动力三种因素对瓦斯水合物诱导时间影响的程度,采用极差法和方差法对实验数据进行分析。结果表明:随着瓦斯中甲烷减少、丙烷增加,水合物的平均诱导时间先减少后增加;随着NaCl质量分数或驱动力Δp增加,水合物平均诱导时间逐渐减少;气样G_2、NaCl质量分数3.5%、驱动力1.5 MPa条件下瓦斯水合物诱导时间最短;驱动力Δp较气体组分对水合物诱导时间影响显著性强,NaCl质量分数的显著性较弱。

关键词：瓦斯水合物成核动力学诱导时间影响因素显著性

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长江上中游坡耕地水土流失治理对策探讨

中国水利 2023年第10期 38-41页

作者：万彩兵胡玉法周鸿基水利部长江水利委员会水土保持局武汉430019

长江上中游是我国坡耕地分布较为集中的区域。在调查长江上中游坡耕地治理现状、存在问题的基础上,分析了长江上中游坡耕地治理面临的新形势新挑战,提出了加强坡耕地监测,建立健全协同联动工作机制,坚持高标准、规模化治理,加强坡耕地... 详细信息

长江上中游是我国坡耕地分布较为集中的区域。在调查长江上中游坡耕地治理现状、存在问题的基础上,分析了长江上中游坡耕地治理面临的新形势新挑战,提出了加强坡耕地监测,建立健全协同联动工作机制,坚持高标准、规模化治理,加强坡耕地治理监管,创新政策机制等对策建议,为新时期加快推进长江上中游坡耕地水土流失治理提供参考借鉴。

关键词：长江上中游坡耕地水土流失治理对策

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矢车菊素-3-O-葡萄糖苷对H9c2心肌细胞衰老影响

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青岛大学学报（医学版） 2022年第5期58卷 708-713页

作者：周宏稷田惠张蕊常晓天安毅青岛大学附属医院心血管内科山东青岛266003

目的探讨矢车菊素-3-O-葡萄糖苷(C3G)对H9c2细胞衰老的影响及其机制。方法应用D-gal构建H9c2心肌细胞衰老模型,并筛选出C3G最佳干预浓度。将正常H9c2心肌细胞分为正常对照组(应用PBS处理48 h)、D-gal处理组(应用10 g/L浓度D-gal处理48 h... 详细信息

目的探讨矢车菊素-3-O-葡萄糖苷(C3G)对H9c2细胞衰老的影响及其机制。方法应用D-gal构建H9c2心肌细胞衰老模型,并筛选出C3G最佳干预浓度。将正常H9c2心肌细胞分为正常对照组(应用PBS处理48 h)、D-gal处理组(应用10 g/L浓度D-gal处理48 h)、C3G处理组(应用1000μmol/L浓度C3G处理48 h)、C3G+D-gal组(应用1000μmol/L浓度C3G与10 g/L浓度D-gal共同处理48 h)。检测各组细胞增殖活性、细胞凋亡水平、细胞内活性氧(ROS)水平;应用SA-β-半乳糖苷酶(SA-β-gal)染色试剂盒测定SA-β-gal表达,应用实时荧光定量PCR方法检测CD38、Sirtuin 6(Sirt6)、己糖激酶(HK2)、乳酸脱氢酶A(LDHA)和端粒酶逆转录酶(TERT)的mRNA表达,WST-8方法检测烟酰胺腺嘌呤二核苷酸(NAD+)的表达。结果使用10 g/L D-gal诱导H9c2心肌细胞48 h成功构建衰老心肌细胞模型,并筛选出C3G的最佳干预浓度为1000μmol/L。应用1000μmol/L浓度C3G进行干预,结果显示C3G可以抑制D-gal所诱导的衰老心肌细胞增殖水平降低(F=189.50,P<0.01)、凋亡水平升高(F=73.12,P<0.01)、细胞内ROS水平升高(F=106.00,P<0.01)以及SA-β-gal阳性细胞升高,降低D-gal诱导的衰老心肌细胞CD38、LDHA、HK2 mRNA表达(F=23.14~94.00,P<0.01),同时升高TERT、Sirt6 mRNA表达(F=43.24、86.81,P<0.01)及NAD+的水平(F=77.02,P<0.01)。结论C3G通过抑制CD38的表达和提高Sirt6的表达,干预心肌细胞凋亡和增殖及糖酵解酶的变化,影响ROS的产生,从而发挥减轻心肌细胞衰老损伤的作用。

关键词：细胞衰老矢车菊素-3-O-葡萄糖苷 CD38 Sirtuin 6

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An Orthogonal Approach to Reusable Component Discovery in Cloud Migration

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China Communications 2015年第5期12卷 134-151页

作者： ZHAO Junfeng zhou Jiantao YANG hongji LIU Guoping College of Computer Science Inner Mongolia University Hohhot Centre for Creative Computing Bath Spa University Bath Advanced Control and Network Technology Research Unit University of South Wales

As an innovative software application mode,Software as a service(SaaS) shows many attractive *** legacy system to SaaS can make outdated systems *** the process of migration,the existing valuable components need to be discovered and reused in order that the target system could be developed/integrated more *** innovative approach is proposed in this paper to extract the reusable components from legacy ***,implementation models of legacy system are recovered through reverse ***,function models are derived by vertical clustering,and then logical components are discovered by horizontal clustering based on the function ***,the reusable components with specific feature descriptions are *** experimental verification,the approach is considered to be efficient in reusable component discovery and to be helpful to migrating legacy system to SaaS.

关键词： legacy system architecture recovery horizontal clustering vertical clustering, reusable component

Effective adjustment of the optoelectronic properties of organic conjugated materials by synthesizing p-n diblock molecules

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Chinese Science Bulletin 2011年第2期56卷 119-136页

作者： JIANG hongji Key Laboratory of Organic Electronics & Information Displays Institute of Advanced Materials Nanjing University of Posts andTelecommunications Nanjing 210046 China

Because organic conjugated materials offer several advantages relative to their inorganic counterparts,the development of organic conjugated materials has been one of the most active research areas in optoelectronic *** almost two decades,the search for organic conjugated materials has represented a major driving force for research concerned with controlling the band gap of extended π-conjugated *** particular,among the parameters affecting the performance of organic light-emitting diodes (OLEDs),the energy levels of organic conjugated materials play an important role because they can affect the driving voltage,wavelength,efficiency,and lifetime of the final *** injection and transport of electrons and holes are therefore crucial for achieving OLEDs with high quantum *** this regard,research into adjusting the energy levels of organic conjugated materials is very meaningful for the development of *** adjust the energy levels of the organic conjugated materials,Huang et *** presented a new molecular design and synthesis route that yields p-n diblock conjugated copolymers and *** present review summarizes and analyzes the progress on adjusting the optoelectronic properties of organic conjugated materials that is due to synthesizing p-n diblock *** discusses primarily work done by Huang et al.,but also discusses work done elsewhere over the past few *** also point out issues that require attention,and highlight hot spots that require further investigation.

关键词：嵌段共聚物结合材料共轭分子合成路线光电性能调整有机发光二极管能量水平

Structural landscape investigations on bendable plastic crystals of isonicotinamide polymorphs

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Chinese Chemical Letters 2022年第8期33卷 4069-4073页

作者： Jianting Li Jiaquan Li hongji Liu Li Zhang Yang Lu Zhengzheng zhou NMPA Key Laboratory for Safety Evaluation of Cosmetics Guangdong Provincial Key Laboratory of Tropical Disease ResearchDepartment of Hygiene Inspection&Quarantine ScienceSchool of Public HealthSouthern Medical UniversityGuangzhou 510515China Beijing City Key Laboratory of Polymorphic Drugs Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Three polymorphs(forms I,II and V)of isonicotinamide(INA)were mechanically flexible and exhibited one-dimensional(1 D)*** intermolecular interactions contribute to the plasticity of single crystals:weak dispersive interactions between slip planes such as 1 D columns in forms I and II or 2 D layers in form V were stabilized by strong hydrogen bonds,allowing the layer or column's surface to glide smoothly without *** disparity of intermolecular interactions on plastic properties of INA polymorphic crystals was confirmed by energy framework analysis,nanoindentation tests and micro-Raman *** crystal which exhibits plastic property provides a promising application in pharmaceuticals and material sciences.

关键词： Isonicotinamide Polymorph Plasticity Slip plane Bending crystal

Modeling and TOPSIS-GRA Algorithm for Autonomous Driving Decision-Making Under 5G-V2X Infrastructure

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Computers, Materials & Continua 2023年第4期75卷 1051-1071页

作者： Shijun Fu hongji Fu Department of Logistics Engineering Chongqing University of Arts and SciencesChongqing402160China School of Mechanical&Automotive Engineering South China University of TechnologyGuangzhou510641China

This paper is to explore the problems of intelligent connected vehicles(ICVs)autonomous driving decision-making under a 5G-V2X structured road *** literature review and interviews with autonomous driving practitioners,this paper firstly puts forward a logical framework for designing a cerebrum-like autonomous driving ***,situated on this framework,it builds a hierarchical finite state machine(HFSM)model as well as a TOPSIS-GRA algorithm for making ICV autonomous driving decisions by employing a data fusion approach between the entropy weight method(EWM)and analytic hierarchy process method(AHP)and by employing a model fusion approach between the technique for order preference by similarity to an ideal solution(TOPSIS)and grey relational analysis(GRA).The HFSM model is composed of two layers:the global FSM model and the local FSM *** decision of the former acts as partial input information of the latter and the result of the latter is sent forward to the local pathplanning module,meanwhile pulsating feedback to the former as real-time refresh *** identify different traffic scenarios in a cerebrum-like way,the global FSM model is designed as 7 driving behavior states and 17 driving characteristic events,and the local FSM model is designed as 16 states and 8 characteristic *** respect to designing a cerebrum-like algorithm for state transition,this paper firstly fuses AHP weight and EWM weight at their output layer to generate a synthetic weight coefficient for each characteristic event;then,it further fuses TOPSIS method and GRA method at the model building layer to obtain the implementable order of state *** verify the feasibility,reliability,and safety of theHFSMmodel aswell as its TOPSISGRA state transition algorithm,this paper elaborates on a series of simulative experiments conducted on the PreScan8.50 *** results display that the accuracy of obstacle detection gets 98%,lane line prediction is beyond

关键词： 5G-V2X cerebrum-like autonomous driving driving behavior decision-making hierarchical finite state machines TOPSIS-GRA algorithm