当代教育家评《论教育家》

《论教育家》是江苏省教育科学研究院孙孔懿研究员主持的江苏省教育科学"十五"重点课题和全国教育科学"十五"规划课题"教育家内涵特征及成长规律研究"的最终成果。该课题结题前,当代五位著名的教育家应邀参加鉴定。现将他们对《论教育家》的评论发表于后(以姓氏笔画为序),以飨读者

control-flow checking performance optimization method based on basic block reduce

控制流检测是抵御单粒子事件的有效手段之一.目前的主流方法是采用嵌入式签名技术, 但是该技术引入的检测指令过多, 导致程序效率低下. 本文使用基本块规约的技术, 在原基本块的基础上, 选择合适的约束量重新划分基本块, 减少引入的检测指令. 与8个常见算法的性能比较表明, 该方法在软错误检测覆盖率基本不变的前提下,能有效提高目标程序效率

transplantation of kaffe to godson 2e

为了在龙芯2E处理器上建立稳定的Java运行环境,丰富龙芯平台的上层软件库,以Kaffe这款开源Java虚拟机为移植对象,分析了其运行机制,确定了其代码结构中平台相关的3个主要模块:SysCallMethod、Trampoline和JTT,并结合龙芯2E处理器的特点,给出了相关模块的修改方案.最后用第三方的测试标准对移植后的虚拟机进行了测试,表明了移植的有效性

Research on the improvement of power customer service knowledge graph and model construction

随着知识图谱在电力服务领域的应用愈加广泛和必要,越来越多的研究者对其进行了深入的研究。其中,基于深度学习的TransE的方法逐渐受到大家的青睐,所以针对其的改进方法也越来越多,例如TransH、TransR/CtransR和TransD等,这些方法均针对&quot;TransE无法解决一对多&quot;等问题,提出了&quot;将TransE模型投影到其他空间&quot;的各种方法。借鉴这些方法的优势,提出了一种基于模糊理论和现有基于深度学习的翻译模型相结合的方法&mdash;&mdash;TransF。在TransF中,为每个元素分别构建两个模糊向量,分别用于构建实体和构建模糊映射,将头尾实体分别映射到与关系构成的模糊空间中。实验结果表明,该方法在训练数据集不大的情况下具有明显优势,并且更符合人类逻辑和实用性的需要。</p

Research on Personalized Sentiment Analysis Technology of Intelligent Service Robot in Electric Power Business Hall

在社交网络媒体中应用的文本情感分析技术,作为一种基础的信息处理技术,可用于分析、处理、汇总和推理带有情感的主观文本。近年来该技术在学界、商界和产业界都受到了广泛的关注,并已应用于互联网的诸多领域。目前该技术在电力营业厅的智能客服以及外呼问答领域都拥有广泛的应用前景。以往针对情感分析的文本研究主要侧重于分析文本表面所表达情感,这样就忽视了用户个体在情感表达上的先天差异,也就对分析结果的准确性产生了不良影响。为解决这些问题,研究侧重于提升在社交媒体中的个性化情感分析的实用性,并以此为基础将模型应用于智能电力客服等相关领域。具体来说,考虑到BP神经网络技术在文本分析处理中的普遍应用,提出了多种基于BP神经网络的模型来解决文本中可能遭遇的个性化情感分析挑战。实验证明该模型可以很好地解决个性化情感分析问题,并可以应用于电力营业厅客服机器人的情感分析领域。</p

高速铁路接触网弹性吊索失效机理分析

随着高铁列车运行速度的不断提升和开行数量的增加，高速铁路接触网弹性吊索的服役环境变得更加复杂、恶劣，进而导致其在服役过程中易于发生疲劳断裂。本文基于高速铁路接触网弹性吊索的服役工况，结合失效分析和动力学仿真，对弹性吊索进行了失效机理分析。首先采用扫描电子显微镜（SEM）表征了吊索断口处的微观组织形貌，并通过能谱（EDS）对断口处的成分进行分析，系统研究了吊索的断裂机制；然后基于动力学理论构建了“车-弓-网”空气动力学模型和弓网刚柔耦合多体动力学模型，采用流-固耦合方法，实现气动与多体动力学的耦合；最后结合吊索服役工况，对明线与隧道、以及隧道内不同张力条件下弹性吊索振动及受力的影响进行了仿真模拟。结果表明：线夹紧固时引起弹性吊索的横向压痕，在弓网振动引起的疲劳交变应力作用下导致弹性吊索发生弯曲疲劳断裂，含有S、Cl离子的大气腐蚀环境加速了断裂进程。隧道内受电弓气动抬升力的变化，导致弹性吊索的动态张力、振幅、弯折角度大幅增大，是造成隧道内弹性吊索过早疲劳失效的根本原因；同时张力的松弛导致振幅增大也进一步缩短了弹性吊索的寿命。建议优化弹性吊索与线夹的连接方式，降低连接时的弯曲应力，从而提高弹性吊索的使用寿命

Weathering Characteristics of Microplastics of Low Density Polyethylene Film in the Coastal Environment of the Yellow River Estuary

【Objective】Microplastic pollution has become a global environmental issue that has caused widespread concern. Coastal zone is a region of land-ocean interaction under the dual impacts of global climate change and human activities. It is also an important sink for microplastics in the environment. However, by far little attention has been paid to long-term weathering characteristics of microplastics in coastal environments. In this study, microplastics of low density polyethylene(LDPE)film, which were commonly found in the coastal environments of the Yellow Sea and the Bohai Sea, were selected as the object for test in exploring long-term weathering characteristics of the microplastics in different coastal environments, including supratidal, intertidal and subtidal zones at the Yellow River Estuary. The aim of this study is to lay down a scientific basis for clarifying fates and effects of microplastics in the coastal environments. 【Method】Microplastics of LDPE film were left in the tidal zones for exposure to the coastal environment for 12 and 18 months. At the end of the each exposure period, they were retrieved for analysis of surface morphology, chemical functional groups(carbonyl index)and density with scanning electron microscopy, Fourier transform infrared spectrometry, and pycnometry. Weathering degree of the microplastics was characterized. 【Result】 Results show that after 18 months of exposure in the field, colonies of microorganisms were observed on the surface of the microplastics in all the zones and so were significant weathering characteristics. The microplastics in the supratidal zone exhibited the highest degree of cracking. Carbonyl groups were also observed on the surface of the microplastics regardless of where they were in, and in terms of carbonyl index of the microplastics, the three zones displayed an order of supratidal zone (0.28-0.81) > intertidal zone (0.18-0.22) > subtidal zone (0.16-0.20). The microplastics did not show much spatio-temporal variation in density. However, having been subjected to ultrasonic cleaning for removal of surface attachments, the microplastics exposed aboveground at the supratidal zone for 18 months were by (0.850.02 g·cm~(-3)) significantly lower than the untreated ones (0.930.03 g·cm~(-3)) in density.【Conclusion】The dynamic changes in morphological characteristics, chemical functional groups (carbonyl index) and density of the microplastics of LDPE film indicate that weathering degree of the microplastics varying with the tidal zone shows a declining order of supratidal zone > intertidal zone > subtidal zone, and the microplastics in the supratidal zone varied sharply with time in weathering characteristics. The microplastics in the coastal environment are subjected to physical, chemical and biological weathering, such as light, friction, chemical oxidation, and biodegradation. Among them, light-triggered photochemical oxidation may contribute the most to the weathering of microplastics. In the future, more attention should be paid to the research on potential environmental effects and fate of microplastics as affected by the complex environmental factors in the coastal environment

温度升高对林线交错带西川韭与草玉梅生殖物候与生长的影响

采用开顶式同化箱(open-top chamber,OTC),研究了川西亚高山林线交错带2种草本植物西川韭(Alllium xichuanense)与草玉梅(Anemone rivularis)生殖物候与生长对模拟增温的短期响应。结果表明:温度升高使西川韭与草玉梅的始花时间、最大开花日和抽茎时间均明显提前;同时,增温延长了2物种的花期,提高了二者的开花率;增温促进了草玉梅的果物候;增温加快了西川韭与草玉梅的生长,而对生长末期株高和各器官生物量却无显著影响。反映了西川韭与草玉梅生殖物候与生长对实验增温的响