大学教授"集群化"发展的成因分析

自大学产生以来，在长达几个世纪的大学生活中，教学活动始终是大学教授职业生涯中的唯一内容。18、19世纪，伴随着科学研究进入大学，大学的职能得到了拓展，大学教授的职业内涵也随之发生了深刻的变化，这是教授“集群化”发展的前提；随着近代科学的蓬勃发展和高度分化，以个人研究为基础的知识生产方式已远远不能满足科学发展的内在需要，“大科学”时代的到来使教授的工作方式逐步走向“集群化”；大学组织结构的松散性为教授“集群化”发展提供了有利的条件。     

一级直线倒立摆匀速行走的模糊控制研究与实现

当前针对倒立摆的研究一般是把角度控制或者位置控制作为控制目标,很少着眼于速度控制,有鉴于此,设计了一种简单的模糊控制器,应用于一级直线倒立摆的匀速行走控制中;仿真实验和实物实时控制实验均验证了该控制器的有效性,对于设定的速度整定值,通过调整几个比例环节的系数,系统具有很好的动态性能指标,而且控制器在有外界扰动时体现了很好的抗扰性;考虑到实际物理系统中倒立摆行程的限制,设计的自动换向开关实现了倒立摆在一段给定的行程上匀速来回行走的控制目标,通过手动切换开关也能实现倒立摆的位置控制。     

一种改进Otsu法在Kirsch边缘检测中的应用

针对灰度图像的Kirsch边缘检测特征不明显以及Otsu方法自动获取最佳阈值耗时等缺点,探讨了一种改进的Otsu法,并将其应用到Kirsch边缘检测中。首先通过Kirsch算法初步检测出图像边缘,然后运用蚁群算法与Otsu算法相结合求取最佳阈值并进行二值化处理。对试验结果和数据的分析,得出所提出的方法能够有效地检测出图像边缘,同时节约运算时间,具有一定的自适应性。     

Iterative quadtree decomposition based automatic selection of the seed point for ultrasound breast tumor images

Based on seed region growing method, lesion segmentation for ultrasound breast tumor images often requires manual selection of the seed point, which is both time-consuming and laborious. To overcome this limit, this paper attempts to explore an automatic method for finding the seed point inside the tumor. Two criteria combining iterative quadtree decomposition (QTD) and the gray characteristics of the lesion are thus designed to locate the seed point. One is to seek the biggest homogenous region and the other is to select the seed region where the seed point is found. Furthermore, this study validates the proposed algorithm through 110 ultrasonic breast tumor images (including 58 malignant tumor images and 52 benign tumor images). According to the needs of the seed region growing algorithm, if the seed point is found inside the tumor, it means the proposed method is correct. Otherwise, it means that the method is a failure. As the quantitative experiment results show, the proposed method in this paper can automatically find the seed point inside the tumor with an accuracy rate of 97.27 %.     

Observation and computer simulation of multicomponent chemical short-range order （MCSRO） for the bulk metallic glasses

The atomic configuration of chemical short-range order (CSRO) for the Zr-base metallic glasses was investigated by using nano-diffraction and high resolution transmission electronic microscopy (HRTEM) technology with a beam size of 0.5 rim. It is illustrated that the pattern of atomic configuration of CSRO might have various compound counterparts because of the chemical interaction of bonding atoms. Some atomic configuration of MCSRO is similar to the icosahedral structure with 10-fold symmetry of very weak spots. In deed, the nano-beam technology could clearly detect the evolution of atomic configuration in nanometer scale during the transformation from the metallic melt to the primary crystallization. The local atomic configuration of CSRO is also investigated by molecular dynamics simulation (MD) for the Zr2Ni compound in a wider temperature range. The CSRO in the melt could be pictorially demonstrated as distorted coordination polyhedron of the compound structure and/or the structure similar to cubo-octahedron analogs. The MD simulation illustrates that the atomic packing of long-range order disappears just above the melting point, but the chemical interaction of bonding atoms still exists that leads to form the various CSRO with the atomic configuration similar to stable or metastable unit cell of Zr2Ni compound. The icosahedral polyhedron became more abundance as the overheating temperature was raised.     

基于KBE的电梯智能设计系统

开发了一个基于知识工程(KBE)技术的面向客户定制的电梯智能设计系统，通过对电梯产品所蕴涵的知识进行归类建库，实现知识的模块化管理；并综合参数化设计、特征建模和软件集成等技术，将产品的特征和产品中凝聚的知识、经验和规则一体封装，建立内容丰富的实例库，以支持并实现智能设计．使用该系统企业可避免大部分重复开发工作，实现大量既有知识的重用，显著提高企业快速响应市场的能力和新产品开发的效率．     

Hydrogen adsorption on graphene foam synthesized by combustion of sodium ethoxide

Hydrogen storage is a crucial technology for the realization of a carbon-neutral society. However, few materials have been able to approach useful hydrogen storage capacity at reasonable temperatures and pressures. Graphene has an extremely high surface-area-to-weight ratio, is strong, cheap, chemically inert, and environmentally benign. As such it may be an ideal substrate for hydrogen storage. Here we present synthesis of graphene foam by combustion of sodium ethoxide. This technique is low-cost, scalable, and results in a three-dimensional graphene network with a surface area of more than 1200 m²/g. It is applied as a hydrogen storage material at liquid nitrogen temperature, with a capacity of 2.1 wt%.     

Multiple objects tracking in the UAV system based on hierarchical deep high-resolution network

Multimedia Tools and Applications - Robust and high-performance visual multi-object tracking is a big challenge in computer vision, especially in a drone scenario. In this paper, an online...     

泡沫除尘机理与泡沫药剂配方的要求

本文分析了泡沫的产生、泡沫除尘机理和表面活性的结构和性质，认为泡沫药剂配方中一般有起泡剂、湿润剂、稳定剂、增溶剂等助剂（表面活性剂），才能有效地降低粉尘，并通过实验确定了泡沫高度、表面张力和表面活性剂溶液浓度之间的变化关系，为研制泡沫药剂配方提供一定的理论和实验依据。     

露天矿用汽车尾气排放对大气环境的影响研究

本文根据有关资料和作者所做的分析工作，初步研究了露天矿用汽车尾气排放对大气环境的影响：排放物作为污染线源的源强计算公式；单车排放系数的计算模式；常用线源扩散模式的验证与比较；污染物浓度分布的预测方法。