基于规则与统计的本体概念自动获取方法研究

为获取中文领域本体的概念提出了基于规则匹配和统计方法相结合的学习模型,充分利用现有的自然语言处理技术和统计学习方法,从领域文本中通过语义串切分、规则匹配、领域归属度分析和概念约简算法自动获取领域概念.该方法解决了现有中文本体学习方法对领域词典的依赖以及无法获得短语式特定领域概念的问题,同时解决了领域概念筛选问题.实验证明了该方法的有效性.     

基于加权超网络模型的组织知识存量表示方法

在对组织知识存量结构及存储情况进行分析的基础上,提出了一种基于加权超网络模型的组织知识存量表示方法。模型中,知识节点具有两类属性值,分别表示组织知识在人脑中以及其他各类存储媒介中的存量。知识节点与各存储媒介节点之间的边具有权重,用以表示组织知识点在各存储媒介中的存量。该方法可同时表示组织知识的存量及存储分布情况,还可用于表示组织成员的个人知识存量、组织知识的定位搜索、组织知识安全性分析等。最后结合一个实例对方法进行了验证。     

组织Web资源的新的标识语言--XML

本文介绍了基于ＸＭＬ的元数据格式,分析ＸＭＬ语言的特点以及它与Ｗ３Ｃ元数据之间的关系,并对网络环境下信息资源组织的发展趋势进行了初步探讨。     

Clodronate-superparamagnetic iron oxide-containing liposomes attenuate renal injury in rats with severe acute pancreatitis

Background and objective

It has been shown that macrophages play an important role in the development of severe acute pancreatitis (SAP), and eventually lead to multiple organ failure (MOF). Clodronate-liposome selectively depleted macrophages. This study was to investigate the role of renal macrophage infiltration in acute renal injury in rats with SAP and to evaluate the potential of superparamagnetic iron oxide (SPIO)-enhanced magnetic resonance imaging (MRI) for diagnosis.

Methods

Superparamagnetic Fe₃O₄ nanoparticles were prepared by chemical coprecipitation. SPIO-liposomes and SPIO-clodronate-liposomes were prepared by the thin film method. SAP models were prepared by injection of sodium taurocholate into the subcapsular space of rat pancreas. Sprague-Dawley rats were randomly divided into a control group, SAP plus SPIO-liposome (P) group, and SAP plus SPIO-clodronate-containing liposome (T) group. Kidney injury was evaluated by T2-weighted MRI scan. The levels of serum amylase (SAM), blood urea nitrogen (BUN), and serum creatinine (SCr) were measured by an automated enzymatic method. Serum tumor necrosis factor-α (TNF-α) was measured by enzyme-linked immunosorbent assay (ELISA). Pathological changes in the pancreas and kidney were observed using hematoxylin and eosin (H&E) staining, while cell apoptosis was detected with terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining. In addition, the macrophage markers (CD68) of the renal tissue were detected with immunohistochemistry.

Results

The pathological changes in the pancreas and kidneys of rats in the T group were milder than those in the P group. The MRI signal intensity of the kidneys in the P and T groups was significantly lower than that in the control group. There were significant changes in the two experimental groups (P<0.01). The levels of SAM, Bun, SCr, and TNF-α in rats in the P group were higher than those in the control group (P<0.01) and in the T group (P<0.01). The apoptosis of the kidney in the T group was higher than that in the P group at 2 and 6 h (P<0.01).

Conclusions

Clodronate-containing liposomes protected against renal injury in SAP rats, and SPIO can be used as a tracer for MRI examination to detect renal injury in SAP rats. SPIO-aided MRI provided an efficient non-invasive way to monitor the migration of macrophages after renal injury in rats with SAP.     

地方高校专业结构与产业结构对接状况的实证分析

区域产业结构与高校专业结构相互依存、相互影响。当前,河南省正处在产业结构优化升级的重要时期,产业结构调整必然要求地方高校专业结构也随之调整。文章以河南工程学院为例,通过调查实证分析发现：当前的专业结构与产业结构总体上基本对接,但是专业结构还需要进一步优化调整。     

高等教育大众化阶段教材使用满意度调查研究

本文以自编的"大学生教材使用满意度调查问卷"对某高校403名本科生进行了大学生教材使用满意度调查研究。研究结论:(1)学生对教材的编印质量、适用性、定价及配套服务的评价有极其显著性差异;(2)学生在注重教材内容的同时,对教材的"附属物"提出了更高要求;(3)学生对教材满意度的评价不受高低年级的影响。同时,分析了7个教材满意度指标低于50%的原因,并从教材编写者、出版社及物价管理部门、学校教材管理部门、授课教师、学生五个方面提出解决策略。     

A numerical study on the dynamics of droplet formation in a microfluidic double T-junction

In this study, droplet formations in microfluidic double T-junctions (MFDTD) are investigated based on a two-dimensional numerical model with volume of fluid method. Parametric ranges for generating alternating droplet formation (ADF) are identified. A physical background responsible for the ADF is suggested by analyzing the dynamical stability of flow system. Since the phase discrepancy between dispersed flows is mainly caused by non-symmetrical breaking of merging droplet, merging regime becomes the alternating regime at appropriate conditions. In addition, the effects of channel geometries on droplet formation are studied in terms of relative channel width. The predicted results show that the ADF region is shifted toward lower capillary numbers when channel width ratio is less than unity. The alternating droplet size increases with the increase of channel width ratio. When this ratio reaches unity, alternating droplets can be formed at very high water fraction (wf = 0.8). The droplet formation in MFDTD depends significantly on the viscosity ratio, and the droplet size in ADF decreases with the increase of the viscosity ratio. The understanding of underlying physics of the ADF phenomenon is useful for many applications, including nanoparticle synthesis with different concentrations, hydrogel bead generation, and cell transplantation in biomedical therapy.     

云南景谷陀螺传统体育文化之教育传承途径探析

文章采用文献资料法、田野调查法、归纳分析法等研究方法,从教育人类学的视角,调查分析了云南景谷县的社会教育、家庭教育及学校教育在陀螺传统体育文化的传承现状和困境,并提出相应对策建议,以期为云南景谷陀螺传统体育文化的传承以及其他面临同样情况的"少数民族传统体育文化"的保存与发展起到借鉴作用。     

On the viability of supporting institutional sharing of remote laboratory facilities

Laboratories are generally regarded as critical to engineering education, and yet educational institutions face significant challenges in developing and maintaining high-quality laboratory facilities. Remote laboratories are increasingly being explored as a partial solution to this challenge, with research showing that – for the right learning outcomes – they can be viable adjuncts or alternatives to conventional hands-on laboratories. One consequential opportunity arising from the inherent support for distributed access is the possibility of cross-institutional shared facilities. While both technical feasibility and pedagogic implications of remote laboratories have been well studied within the literature, the organisational and logistical issues associated with shared facilities have received limited consideration. This paper uses an existing national-scale laboratory sharing initiative, along with a related survey and laboratory sharing data, to analyse a range of factors that can affect engagement in laboratory sharing. The paper also discusses the implications for supporting ongoing laboratory sharing.     

Evil-hunter:基于评分机制的web shell检测系统(英文)

针对及时检测攻击者利用系统漏洞或篡改网页开源代码秘密地在web服务器上嵌入的恶意代码web shell问题,提出了一种基于评分机制的web shell检测系统Evil-hunter.首先,从互联网和各种安全论坛上收集了大量的web shell经常使用的恶意函数样本数据.其次,根据恶意函数在web shell和正常web应用中的不同危险级别和使用频度,利用所提出的评分策略对所收集的样本数据进行评分,并分析统计结果以得出适当的分数阈值.最后,根据所得出的分数阈值,借用简单的检测算法来对web应用中所包含的恶意代码web shell进行识别.实验结果表明,与其他方法相比Evil-hunter具有更高的识别率和准确度.