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岩沥青胶粉复合改性高模量沥青性能研究

公路交通科技 2024年第2期41卷 1-10页

作者：王联芳孙立军吕泉同济大学道路与交通工程教育部重点实验室上海201804

为改善沥青路面抗车辙性能,解决因交通量迅猛增长和重载化而导致的路面车辙病害问题,采用岩沥青、胶粉对沥青进行复合改性,制备高模量胶粉/岩沥青复合改性沥青。随后通过沥青三大指标、黏度、动态剪切流变试验等测试指标分析不同改性沥... 详细信息

为改善沥青路面抗车辙性能,解决因交通量迅猛增长和重载化而导致的路面车辙病害问题,采用岩沥青、胶粉对沥青进行复合改性,制备高模量胶粉/岩沥青复合改性沥青。随后通过沥青三大指标、黏度、动态剪切流变试验等测试指标分析不同改性沥青的高低温性能特点,并采用抗老化性能试验和储存稳定性试验研究复合改性沥青的高温储存稳定性及抗老化性能的变化规律。利用荧光显微分析(FM)和红外光谱(FTIR)分析技术探明沥青的复合改性机理。结果表明:胶粉和岩沥青的掺入有效改善了沥青路用性能,且胶粉能够削弱岩沥青对沥青低温性能的劣化效果;岩沥青能够有效改善沥青的储存稳定性和抗老化性能。此外,胶粉和岩沥青颗粒使得复合改性沥青的弹性成分明显增加,弹性恢复能力得到提升。随着岩沥青的掺量增加,复合改性沥青的高温抗剪能力提升更加显著;但过量的岩沥青难以分布均匀,容易导致颗粒聚集。胶粉能够在沥青中产生溶胀形成局部的网络结构,岩沥青颗粒则能够分布在这些网络结构中,与沥青进行物理共混,从而提高了沥青的内聚力。确定岩沥青和胶粉的掺量分别为6%和20%。

关键词：道路工程复合改性高模量沥青流变试验改性沥青岩沥青

Identification of Known and Novel PTCH Mutations in Both Syndromic and Non-syndromic Keratocystic Odontogenic Tumors

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International Journal of Oral Science 2009年第1期1卷 34-38页

作者： Shuang Pan li-li Xu li-sha sun Tie-jun li Department of Oral Pathology Peking University School and Hospital of Storaatology Beijing China

Aim To clarify the role of PTCH in patients with NBCCS- related and non-sydromic keratocystic odontogenic tumors. Methodology Mutation analysis was undertaken in 8 sporadic and 4 NBCCS-associated KCOTs. Results Four novel and two known mutations were identifled in 2 sporadic and 3 syndromic cases, two of which being germline mutations （c.2179delT, c.2824delC） and 4 somatic mutations （c.3162dupG, c.1362-1374dup, c.1012 C〉T, c.403C〉T）. Conclusion Our findings suggest that defects of PTCH are associated with the pathogenesis of syndromic as well as a subset of non-syndromic KCOTs.

关键词： keratocystic odontogenic tumor mutation,nevoid basal cell carcinoma syndrome PTCH

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基于磁共振弛豫时间实现加权像和压脂技术

大学物理 2024年第1期43卷 74-81页

作者：尹朝阳孙骏力姚红英复旦大学物理学系上海200433

磁共振成像是根据生物磁性核在磁场中表现的共振特性进行成像的新技术,其中弛豫时间是实现和控制成像的重要物理量.本文使用磁共振成像实验仪,对相关样品的纵向弛豫时间T 1、横向弛豫时间T 2进行测量,并且基于不同弛豫时间采用自旋回波... 详细信息

磁共振成像是根据生物磁性核在磁场中表现的共振特性进行成像的新技术,其中弛豫时间是实现和控制成像的重要物理量.本文使用磁共振成像实验仪,对相关样品的纵向弛豫时间T 1、横向弛豫时间T 2进行测量,并且基于不同弛豫时间采用自旋回波序列实现T 1、T 2加权像,用反转恢复成像序列实现磁共振成像对脂肪的抑制.

关键词：磁共振(MRI) 弛豫时间加权像磁共振脂肪抑制技术

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即食金鲳鱼干生产工艺研究

粮食与油脂 2024年第1期37卷 85-89,98页

作者：陈昊文吕正孟黄家宝苏伟明孙力军邓旗广东海洋大学食品科技学院广东湛江524088

以金鲳鱼为主要原料制备即食金鲳鱼干,以感官评分为指标,在单因素试验和预试验的基础上通过正交试验优化调味配方和调味生产工艺,并对产品的理化指标、微生物及主要风味成分进行测定。结果表明:以金鲳鱼肉质量为基准,最佳调味配方为食... 详细信息

以金鲳鱼为主要原料制备即食金鲳鱼干,以感官评分为指标,在单因素试验和预试验的基础上通过正交试验优化调味配方和调味生产工艺,并对产品的理化指标、微生物及主要风味成分进行测定。结果表明:以金鲳鱼肉质量为基准,最佳调味配方为食盐添加量8%、麻辣粉添加量11%、味精添加量2.5%、白糖添加量5%、白酒与鱼肉液料比25:1(mL/kg);最佳调味生产工艺为鱼肉与调味液料液比1:3(g/mL)、腌制温度25℃、腌制时间2h;在此条件下生产的即食金鲳鱼干的理化指标和微生物指标均符合相关标准,主要挥发性成分为硫化物、醇类和芳香化合物。

关键词：即食金鲳鱼干调味配方感官评分生产工艺

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light(Science & Applications) 2024年第2期13卷 333-346页

作者： Yifan sun Qian li ling-jun Kong Xiangdong Zhang Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology100081BeijingChina

Compared with electrical neural networks,optical neural networks(ONNs)have the potentials to break the limit of the bandwidth and reduce the consumption of energy,and therefore draw much attention in recent *** far,several types of ONNs have been ***,the current ONNs cannot realize the acceleration as powerful as that indicated by the models like quantum neural *** to construct and realize an ONN with the quantum speedup is a huge ***,we propose theoretically and demonstrate experimentally a new type of optical convolutional neural network by introducing the optical *** is called the correlated optical convolutional neural network(COCNN).We show that the COCNN can exhibit“quantum speedup”in the training *** character is verified from the two *** is the direct illustration of the faster convergence by comparing the loss function curves of the COCNN with that of the traditional convolutional neural network(CNN).Such a result is compatible with the training performance of the recently proposed quantum convolutional neural network(QCNN).The other is the demonstration of the COCNN’s capability to perform the QCNN phase recognition circuit,validating the connection between the COCNN and the ***,we take the COCNN analog to the 3-qubit QCNN phase recognition circuit as an example and perform an experiment to show the soundness and the feasibility of *** results perfectly match the theoretical *** proposal opens up a new avenue for realizing the ONNs with the quantum speedup,which will benefit the information processing in the era of big data.

关键词： process quantum convolution

Engineering phonon thermal transport in few-layer PdSe_(2)

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Frontiers of physics 2024年第3期19卷 135-141页

作者： Meilin li Huanhuan sun jun Zhou Yunshan Zhao Phonon Engineering Research Center of Jiangsu Province Center for Quantum Transport and Thermal Energy ScienceInstitute of Physics Frontiers and Interdisciplinary SciencesSchool of Physics and TechnologyNanjing Normal UniversityNanjing 210023China

Engineering phonon transport in low-dimensional materials has great significance not only for fundamental research,but also for thermal management applications of electric ***,due to the difficulties of micro and nano processing and characterization techniques,the work on tuning phonon transport at nanoscale are *** this work,by introducing Ar+plasma,we probed the phonon transport in two-dimensional(2D)layered semiconductor PdSe_(2)under different defect *** using thermal bridge method,the thermal conductivity was measured to decrease by 50%after a certain Ar+irradiation,which implied a possible phase ***,Raman characterizations were performed to show that the Raman sensitive peaks of PdSe_(2)was red-shifted and finally became disappeared with the increase of defect concentration.“Defect engineering”proves be a practical strategy in tuning the phonon thermal transport in low-dimensional materials,thus providing guidance for potential application in designing thermoelectric devices with various emerging materials.

关键词： phonon transport PdSe_(2) defects thermal bridge method

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基于布谷鸟搜索优化特征选择的轴承故障诊断

计算机仿真 2024年第7期41卷 529-534,539页

作者：辛艳孙丽君陈天飞冯斌斌河南工业大学粮食信息处理与控制教育部重点实验室河南郑州450001 河南工业大学郑州市机器感知与智能系统重点实验室河南郑州450001 河南工业大学电气工程学院河南郑州450001

针对高维特征导致的滚动轴承故障诊断精度低问题,提出一种基于改进二进制布谷鸟搜索的特征选择方法。首先,采用Hilbert-Huang变换技术提取电机信号的时频域信息,建立高维特征集合。其次,基于布谷鸟搜索算法提出一种基于互信息的特征加... 详细信息

针对高维特征导致的滚动轴承故障诊断精度低问题,提出一种基于改进二进制布谷鸟搜索的特征选择方法。首先,采用Hilbert-Huang变换技术提取电机信号的时频域信息,建立高维特征集合。其次,基于布谷鸟搜索算法提出一种基于互信息的特征加权初始化方法,通过计算特征互信息对原始特征集合进行相关性评估,达到快速去除无关特征的目的。同时,引入局部螺旋开发策略,并采用动态切换概率算子实现全局探索和局部开发的平衡,加快算法收敛。最后,采用KNN分类器对轴承状态进行诊断,实验研究表明,上述方法能有效提取更具价值的特征信息,识别精度高达99.05%,相比于其它同类方法诊断准确率高,性能更稳定。

关键词：特征选择二进制布谷鸟搜索算法故障诊断互信息

FADSF:A Data Sharing Model for Intelligent Connected Vehicles Based on Blockchain Technology

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Computers, Materials & Continua 2024年第8期80卷 2351-2362页

作者： Yan sun Caiyun liu jun li Yitong liu Data Security Institute China Industrial Control Systems Cyber Emergency Response TeamBeijing100040China

With the development of technology,the connected vehicle has been upgraded from a traditional transport vehicle to an information terminal and energy storage *** data of ICV(intelligent connected vehicles)is the key to organically maximizing their ***,in the context of increasingly strict global data security supervision and compliance,numerous problems,including complex types of connected vehicle data,poor data collaboration between the IT(information technology)domain and OT(operation technology)domain,different data format standards,lack of shared trust sources,difficulty in ensuring the quality of shared data,lack of data control rights,as well as difficulty in defining data ownership,make vehicle data sharing face a lot of problems,and data islands are *** study proposes FADSF(Fuzzy Anonymous Data Share Frame),an automobile data sharing scheme based on *** data holder publishes the shared data information and forms the corresponding label storage on the *** data demander browses the data directory information to select and purchase data assets and verify *** data demander selects and purchases data assets and verifies them by browsing the data directory ***,this paper designs a data structure Data Discrimination Bloom Filter(DDBF),making complaints about illegal *** the number of data complaints reaches the threshold,the audit traceability contract is triggered to punish the illegal data publisher,aiming to improve the data quality and maintain a good data sharing *** this paper,based on Ethereum,the above scheme is tested to demonstrate its feasibility,efficiency and security.

关键词： Blockchain connected vehicles data sharing smart contracts credible traceability

Special Issue:Dynamic Polymer Networks

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Chinese Journal of Polymer Science 2024年第10期42卷 1401-1402页

作者： jun-Qi sun Zhi-Bo li Tao Xie 不详

The ease of processing and light weight have made polymeric materials uniquely suited for numerous general ***,realization of their switchable chain configuration/mobility and molecular design versatility has pushed p... 详细信息

关键词： uniquely realization polymeric