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Reaction mechanisms between molten CaF2-based slags and molten 9CrMoCoB steel

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International Journal of Minerals,Metallurgy and Materials 2020年第5期27卷 611-619页

作者： Lei-zhen Peng Zhou-hua Jiang Xin Geng School of Metallurgy Northeastern UniversityShenyang 110819China

Investigating the reaction mechanism between slag and 9CrMoCoB steel is important to develop the proper slag and produce qualified ingots in the electroslag remelting(ESR) process. Equilibrium reaction experiments between molten 9CrMoCoB steel and the slags of 55 wt%CaF2–20 wt%CaO–3 wt%MgO–22 wt%Al2O3–xwt%B2O3(x = 0.0, 0.5, 1.0, 1.5, 2.0, 3.0) were conducted. The reaction mechanisms between molten 9 CrMoCoB steel and the slags with different B2O3 contents were deduced based on the composition of the steel and slag samples at different reaction times. Results show that B content in the steel can be controlled within the target range when the B2O3 content is 0.5 wt% and the FeO content ranges from 0.18 wt% to 0.22 wt% in the slag. When the B2O3 content is ≥1 wt%, the reaction between Si and B2O3 leads to the increase of the B content of steel. The additions of SiO2 and B2O3 to the slag should accord to the mass ratio of [B]/[Si] in the electrode, and SiO2 addition inhibits the reaction between Si and Al2O3.

关键词： 9CrMoCoB electroslag remelting B2O3 thermodynamic calculation reaction mechanism

A data-driven method for estimating the target position of low-frequency sound sources in shallow seas

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Frontiers of Information Technology & Electronic Engineering 2021年第7期22卷 1020-1030页

作者： Xianbin SUN Xinming JIA Yi zhenG zhen WANG School of Mechanical and Automobile Engineering Qingdao University of TechnologyQingdao 266000China Institute of Oceanographic Instrumentation Shandong Academy of SciencesQingdao 266000China

Estimating the target position of low-frequency sound sources in a shallow sea environment is difficult due to the high cost of hydrophone placement and the complexity of the propagation *** propose a compressed recurrent neural network(C-RNN)model that compresses the signal received by a vector hydrophone into a dynamic sound intensity signal and compresses the target position of the sound source into a GeoHash *** types of data are used to carry out prior training on the recurrent neural network,and the trained network is subsequently used to estimate the target position of the sound *** with traditional mathematical models,the C-RNN model functions independently under the complex sound field environment and terrain conditions,and allows for real-time positioning of the sound source under low-parameter operating *** results show that the average error of the model is 56 m for estimating the target position of a low-frequency sound source in a shallow sea environment.

关键词： Vector hydrophone Shallow sea Low frequency Location estimation Recurrent neural network

基于概率逻辑推理的高阶互补云API推荐方法

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计算机学报 2024年第8期47卷 1922-1948页

作者：陈真谢登辉王小龙孙梦梦刘啸威申利民燕山大学信息科学与工程学院河北秦皇岛066004 河北省计算机虚拟制造与系统集成重点实验室河北秦皇岛066004

云时代,云API作为服务交付、数据交换和能力复制的最佳载体,已成长为当今面向服务软件开发和企业数字化转型不可或缺的核心要素.然而动态开放网络中持续增长的云API在给开发者提供了更多选择的同时,也将其淹没在海量的云API选择之中,设... 详细信息

云时代,云API作为服务交付、数据交换和能力复制的最佳载体,已成长为当今面向服务软件开发和企业数字化转型不可或缺的核心要素.然而动态开放网络中持续增长的云API在给开发者提供了更多选择的同时,也将其淹没在海量的云API选择之中,设计有效的云API推荐方法就此成为API经济健康发展中迫切要解决的现实问题.但是,现有研究主要利用搜索关键词、服务质量和调用偏好进行建模,生成质量高功能单一的云API推荐列表,没有考虑服务化软件实际开发中开发者对多元化高阶互补云API的客观需要.高阶互补云API推荐旨在为多个查询云API生成多元互补云API列表,要求推荐结果与查询云API均互补,以满足开发者的联合需求.针对此问题,本文提出基于概率逻辑推理的高阶互补云API推荐方法(Probabilistic Logic Reasoning for High-order Complementary Cloud API Recom⁃mendation,PLR4HCCR).首先,通过云API生态真实数据分析论证云API互补推荐需求的必要性和互补关系建模中替补噪声的客观存在,为云API互补推荐问题研究提供动机和数据支持.其次,采用Beta概率嵌入对云API及其之间的关系约束进行编码,以刻画云API间互补关系的不确定性和支持互补逻辑推理.接着,设计由投影、取反和交并三个基本逻辑算子构建的互补关系逻辑推理网络,使查询集中的每个云API获得非对称互补关系感知和替补噪声消解约束下的互补云API表示.然后,引入注意力机制为查询云API的互补云API分配不同权重,增强高阶互补云API基向量的表征能力.在此基础上,采用KL散度度量高阶互补云API基向量与候选云API之间的距离,并根据KL散度排序生成高阶互补性可感知下的云API推荐结果.最后,我们利用两个真实云API数据集在不同阶互补推荐场景下进行实验,实验表明,与传统启发式推荐方法和深度学习推荐方法相比,PLR4HCCR在互补关系感知推理和替补噪声消解方面均具有较大的优势,继而使其在低阶、高阶和混合阶互补云API推荐中均展示出更优的推荐效果和更强的泛化能力.进一步,超参数敏感性实验、实例分析和用户调查验证了方法的有效性、实用性和可行性,这使结合高阶互补关系的云API推荐方法PLR4HCCR不仅更有可能生成开发者满意的结果,而且可有效提升云API服务提供者的收益.

关键词：面向服务软件开发云API推荐高阶互补逻辑推理 Beta概率嵌入

Multi-stage Dynamic Post-disaster Recovery Strategy for Distribution Networks Considering Integrated Energy and Transportation Networks

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 408-420页

作者： Xinyi Jiang Jian Chen Ming Chen zhen Wei Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061China State Grid Qingdao Power Supply Company Qingdao 266002China

To improve the resilience of distribution networks(DNs),a multi-stage dynamic recovery strategy is proposed in this paper,which is designed for post-disaster DN considering an integrated energy system(IES)and transportation network(TN).First,the emergency response quickly increases the output of gas turbines(GTs)in the natural gas network(NGN),and responsively reconfigures the DN in microgrids,to maximize the amount of loads to be *** single-commodity flow model is adopted to construct spanning tree ***,in the second stage of energy storage recovery,mobile energy storage systems(MESSs)are deployed to cover the shortages of power demands,i.e.,to further restore the loads after evaluating the load recovery *** Floyd algorithm based dynamic traffic assignment(DTA)is selected to obtain the optimal path of the *** the third stage,the outputs of various post-disaster recovery measures are adjusted to achieve an economically optimized *** studies demonstrate the effectiveness of the proposed dynamic post-disaster recovery strategy.

关键词： Dynamic post-disaster recovery dynamic transportation network integrated energy system resilience distribution

喷射沉积超高强铝基复合材料的组织及性能研究

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热加工工艺 2024年第4期53卷 111-114页

作者：韩震龚留奎章国伟杜喜旺陈伟中国兵器科学研究院宁波分院浙江宁波315103 宁波表面工程研究院有限公司浙江宁波315103 宁波工程学院机械工程学院浙江宁波315211

采用喷射沉积技术研制铝基SiC复合材料,通过调整喷射沉积参数(雾化压力、扫描频率)和同轴送粉设备参数,研制出SiC均匀分布的直径为φ255 mm、高度为500 mm的喷射沉积铝基复合材料坯锭。微观组织结果表明,沉积坯锭晶粒均匀细小,无宏观偏... 详细信息

采用喷射沉积技术研制铝基SiC复合材料,通过调整喷射沉积参数(雾化压力、扫描频率)和同轴送粉设备参数,研制出SiC均匀分布的直径为φ255 mm、高度为500 mm的喷射沉积铝基复合材料坯锭。微观组织结果表明,沉积坯锭晶粒均匀细小,无宏观偏析现象,晶粒平均尺寸为(17.3±4.7)μm,但部分晶粒之间存在微孔缺陷。SiC颗粒在基体中没有明显的富集,呈弥散分布,尺寸约5~20μm,且在SiC颗粒附近有微孔缺陷。经挤压处理、双极固溶处理、峰时效处理后,合金的抗拉强度、屈服强度、断后伸长率、弹性模量分别为650 MPa、600 MPa、6%、85 GPa,并且组织致密无微孔。

关键词：喷射沉积铝基复合材料固溶时效抗拉强度

Adaptive spectral affinity propagation clustering

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Journal of Systems Engineering and Electronics 2022年第3期33卷 647-664页

作者： TANG Lin SUN Leilei GUO Chonghui ZHANG zhen Institute of Systems Engineering Dalian University of TechnologyDalian 116024China School of Computer Science and Engineering Beihang UniversityBeijing 100191China

Affinity propagation(AP)is a classic clustering *** improve the classical AP algorithms,we propose a clustering algorithm namely,adaptive spectral affinity propagation(AdaSAP).In particular,we discuss why AP is not suitable for non-spherical clusters and present a unifying view of nine famous arbitrary-shaped clustering *** propose a strategy of extending AP in non-spherical clustering by constructing category similarity of *** the monotonicity that the clusters’number increases with the self-similarity in AP,we propose a model selection procedure that can determine the number of clusters *** the parameters introduced by extending AP in non-spherical clustering,we provide a grid-evolving strategy to optimize them *** effectiveness of AdaSAP is evaluated by experiments on both synthetic datasets and real-world clustering *** results validate that the superiority of AdaSAP over benchmark algorithms like the classical AP and spectral clustering algorithms.

关键词： affinity propagation(AP) Laplacian eigenmap(LE) arbitrary-shaped cluster model selection

A new focused crawler using an improved tabu search algorithm incorporating ontology and host information

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Frontiers of Information Technology & Electronic Engineering 2023年第6期24卷 859-875页

作者： Jingfa LIU zhen WANG Guo ZHONG Zhihe YANG School of Information Science and Technology Guangdong University of Foreign StudiesGuangzhou 510006China China Unicom Central South Research Institute Changsha 410000China

To solve the problems of incomplete topic description and repetitive crawling of visited hyperlinks in traditional focused crawling methods,in this paper,we propose a novel focused crawler using an improved tabu search algorithm with domain ontology and host information(FCITS_OH),where a domain ontology is constructed by formal concept analysis to describe topics at the semantic and knowledge *** avoid crawling visited hyperlinks and expand the search range,we present an improved tabu search(ITS)algorithm and the strategy of host information *** addition,a comprehensive priority evaluation method based on Web text and link structure is designed to improve the assessment of topic relevance for unvisited *** results on both tourism and rainstorm disaster domains show that the proposed focused crawlers overmatch the traditional focused crawlers for different performance metrics.

关键词： Focused crawler Tabu search algorithm Ontology Host information Priority evaluation

HPLC-MS/MS法同时测定月季花配方颗粒中10种成分的含量

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中成药 2024年第5期46卷 1435-1440页

作者：李志娇郑振秋张晓博巩长芹临沂市检验检测中心山东临沂276001 齐鲁制药有限公司山东济南250000

目的建立HPLC-MS/MS法同时测定月季花配方颗粒中金丝桃苷、异槲皮苷、没食子酸、鞣花酸、槲皮苷、芦丁、阿福豆苷、萹蓄苷、槲皮素-3-O-6-反式-香豆酰基-β-D-葡萄糖苷、槲皮素3-O-2″-没食子酰基-β-D-葡萄糖苷的含量。方法分析采用Wat... 详细信息

目的建立HPLC-MS/MS法同时测定月季花配方颗粒中金丝桃苷、异槲皮苷、没食子酸、鞣花酸、槲皮苷、芦丁、阿福豆苷、萹蓄苷、槲皮素-3-O-6-反式-香豆酰基-β-D-葡萄糖苷、槲皮素3-O-2″-没食子酰基-β-D-葡萄糖苷的含量。方法分析采用Waters Acquity UPLC HSS T3色谱柱(1.8μm,2.1 mm×150 mm);流动相甲醇-0.1%甲酸,梯度洗脱;体积流量0.3 mL/min;柱温40℃;电喷雾离子源;负离子扫描;多反应监测模式。结果10种成分在各自范围线性关系良好(r>0.9958),平均加样回收率97.3%~99.6%,RSD 0.8%~2.7%。结论该方法简便快速,灵敏度高,专属性强,可用于月季花配方颗粒的质量控制。

关键词：月季花配方颗粒化学成分含量测定 HPLC-MS/MS

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突触可塑性改变在脆性X综合征中的研究进展

中华神经医学杂志 2024年第4期23卷 404-408页

作者：亓娜吴希李敏黄俊宇曾燕陈亮魏珍武汉科技大学医学部脑科学先进技术研究院武汉430065

脆性X综合征(FXS)是由脆性X综合征智力低下蛋白(FMRP)缺失引起的神经发育性突触类疾病,突触可塑性异常是造成FXS患者认知障碍、恐惧和焦虑情绪、多动、刻板行为的主要病理原因。近年来,突触可塑性在FXS中的功能研究取得突破性进展,为FX... 详细信息

脆性X综合征(FXS)是由脆性X综合征智力低下蛋白(FMRP)缺失引起的神经发育性突触类疾病,突触可塑性异常是造成FXS患者认知障碍、恐惧和焦虑情绪、多动、刻板行为的主要病理原因。近年来,突触可塑性在FXS中的功能研究取得突破性进展,为FXS的防治提供了新的理论基础。本文现围绕突触可塑性在FXS中的异常表现和影响因素,以及目前临床上靶向突触可塑性的FXS治疗策略进行综述,以期加深医学工作者对相关进展的了解。

关键词：脆性X综合征脆性X综合征智力低下蛋白突触可塑性