Analysis of sub-anatomic diffusion tensor imaging indices in white matter regions of Alzheimer with MMSE score

In this study, an attempt has been made to find the correlation between diffusion tensor imaging (DTI) indices of white matter (WM) regions and mini mental state examination (MMSE) score of Alzheimer patients. Diffusion weighted images are obtained from the ADNI database. These are preprocessed for eddy current correction and removal of non-brain tissue. Fractional anisotropy (FA), mean diffusivity (MD), radial diffusivity (RD) and axial diffusivity (DA) indices are computed over significant regions (Fornix left, Splenium of corpus callosum left, Splenium of corpus callosum right, bilateral genu of the corpus callosum) affected by Alzheimer disease (AD) pathology. The correlation is computed between diffusion indices of the significant regions and MMSE score using linear fit technique so as to find the relation between clinical parameters and the image features. Binary classification has been employed using support vector machine, decision stumps and simple logistic classifiers on the extracted DTI indices along with MMSE score to classify Alzheimer patients from healthy controls. It is observed that distinct values of DTI indices exist for the range of MMSE score. However, there is no strong correlation (Pearson's correlation coefficient ‘r’ varies from 0.0383 to −0.1924) between the MMSE score and the diffusion indices over the significant regions. Further, the performance evaluation of classifiers shows 94% accuracy using SVM in differentiating AD and control. In isolation clinical and image features can be used for prescreening and diagnosis of AD but no sub anatomic region correlation exist between these features set. The discussion on the correlation of diffusion indices of WM with MMSE score is presented in this study.     

企业核心竞争力关键要素——质量

介绍了如何体现产品质量及如何控制产品质量。     

个人洗护用品配方原理及应用技术(Ⅱ)--护肤品配方原理及应用

从护肤品配方原理、各类配方成分(如乳化剂)介绍和其应用等方面讨论护肤品开发应用的相关注意要点，并给出了参考配方。     

RTM制品常见缺陷及其对策

本文主要阐述了RTM制品缺陷产生的原因及其解决方法.     

离心分配色谱技术及其在天然产物分离中的应用

作为现代逆流色谱的一种，离心分配色谱(CPC)是一种新型的制备色谱技术。简单介绍了离心分配色谱的设备原理和操作方法，综述了离心分配色谱的研究现状和其应用于天然产物分离方面的相关报道，特别对离心分配色谱反应器和离子交换置换离心分配色谱等一些CPC研究领域出现的新技术进行了介绍；对离心分配色谱的研究前景进行了展望。     

基于反调和平均的张量形态学算子模型及其在彩色图像边缘检测中的应用

旨在建立基于张量模型的彩色图像形态学算子。通过将HSV彩色空间下的三维向量利用二阶对称正定张量进行建模表示, 提出一种基于反调和平均的彩色形态学算子。在此基础上, 借助于张量相似性度量构造基于参考张量的形态学算子, 该算子能够实现滤波的输入保持。通过基于形态学梯度的边缘检测实验验证模型的可行性和有效性。对比实验表明基于张量的彩色形态学模型相对于原有的向量模型在图像处理中具有更好的结果。     

An Elastic Architecture Adaptable to Various Application Scenarios

The quantity of computer applications is increasing dramatically as the computer industry prospers. Meanwhile, even for one application, it has different requirements of performance and power in different scenarios. Although various processors with different architectures emerge to fit for the various applications in different scenarios, it is impossible to design a dedicated processor to meet all the requirements. Furthermore, dealing with uncertain processors significantly aggravates the burden of programmers and system integrators to achieve specific performance/power. In this paper, we propose elastic architecture （EA） to provide a uniform computing platform with high elasticity, i.e., the ratio of worst-case to best-case performance/power/performance-power trade-off, which can meet different requirements for different applications. It is achieved by dynamically adjusting architecture parameters （instruction set, branch predictor, data path, memory hierarchy, concurrency, status~zcontrol, and so on） on demand. The elasticity of our prototype implementation of EA, as Sim-EA, ranges from 3.31 to 14.34, with 5.41 in arithmetic average, for SPEC CPU2000 benchmark suites, which provides great flexibility to fulfill the different performance and power requirements in different scenarios. Moreover, Sim-EA can reduce the EDP （energy-delay product） for 31.14% in arithmetic average compared with a baseline fixed architecture. Besides, some subsequent experiments indicate a negative correlation between application intervals＇ lengths and their elasticities.     

一种基于软件产品库的分布式可信认证方法

计算机系统的安全问题一直困绕着整个计算机行业和计算机用户,针对现有技术的缺陷,提出了一种全新的基于软件产品库的分布式认证方法来提高计算机系统的安全防御性。该方法对于广泛使用计算机的工业自动化、计算机网络、通讯、电子商务等领域,具有重要的现实价值。     

努力提高过磷酸钙质量

论述以高浓度肥料作为发展方向的今天,过磷酸钙在我国仍应有其一定的地位。介绍扶余化肥厂在以浓酸矿浆法生产过磷酸钙中,采取的一系列技改措施:磷矿配矿使用,增加破碎,提高矿浆细度,定矿调水法磨矿,定浆调酸法混合等,并对磨矿机、混合器、料浆泵、风机等设备进行技改,使产品质量100%达标。