小型水利工程项目划分分析

以小型水利工程项目划分为对象,从质量监督确认工作角度出发,根据小型水利工程的特点,探讨在现有规程下针对实际不同工程的恰当的项目划分方式,以利参建各方更好地控制工程质量。     

CAD/CAE公共服务平台中资源共享智能型系统研究

在产业技术公共服务平台的影响和带动下,随着其用户规模不断扩大和信息技术的发展,越来越要求平台服务向智能化发展,有必要对其中之一的资源共享智能型系统建设进行探讨。     

信息技术课堂分层教学的实践与思考

新课程背景下的教学理念是“以学生发展为本”,在以机房环境为主的信息科技学科教学过程中如何关注每一位学生的有效学习,使他们的信息素养得到充份的发展对教师提出了相当高的要求。在教学各环节实施分层教学能体现教师对每一位学生的关爱,也能切实提高教学有效性。该文从关注每一位孩子的成长角度,简述了分层教学在初中信息科技学科教学中的实施策略及相关思考。     

海明码在视频水印中的应用

通过分析海明码的实现原理,设计一个基于海明码的视频7K印模型,并对诙模型进行程序验证。实验结果表明：基于海明码的视频水印方案能够有效提高7R印的可恢复性、顽健性、可升级性、适用性,但对视频面质有一定的影响。     

档案馆的社会化服务

本文试从在继续做好为领导和机关提供档案信息服务的同时,就做好面向社会大众的档案信息社会化服务工作进行探讨。     

Point cloud completion via structured feature maps using a feedback network

Computational Visual Media - In this paper, we tackle the challenging problem of point cloud completion from the perspective of feature learning. Our key observation is that to recover the...     

Enhanced semantic representation learning for implicit discourse relation classification

Applied Intelligence - Implicit discourse relation classification is one of the most challenging tasks in discourse parsing. Without connectives as linguistic clues, classifying discourse relations...     

Application potential of bone marrow mesenchymal stem cell (BMSCs) based tissue-engineering for spinal cord defect repair in rat fetuses with spina bifida aperta

Spina bifida aperta are complex congenital malformations resulting from failure of fusion in the spinal neural tube during embryogenesis. Despite surgical repair of the defect, most patients who survive with spina bifida aperta have a multiple system handicap due to neuron deficiency of the defective spinal cord. Tissue engineering has emerged as a novel treatment for replacement of lost tissue. This study evaluated the prenatal surgical approach of transplanting a chitosan–gelatin scaffold seeded with bone marrow mesenchymal stem cells (BMSCs) in the healing the defective spinal cord of rat fetuses with retinoic acid induced spina bifida aperta. Scaffold characterisation revealed the porous structure, organic and amorphous content. This biomaterial promoted the adhesion, spreading and in vitro viability of the BMSCs. After transplantation of the scaffold combined with BMSCs, the defective region of spinal cord in rat fetuses with spina bifida aperta at E20 decreased obviously under stereomicroscopy, and the skin defect almost closed in many fetuses. The transplanted BMSCs in chitosan–gelatin scaffold survived, grew and expressed markers of neural stem cells and neurons in the defective spinal cord. In addition, the biomaterial presented high biocompatibility and slow biodegradation in vivo. In conclusion, prenatal transplantation of the scaffold combined with BMSCs could treat spinal cord defect in fetuses with spina bifida aperta by the regeneration of neurons and repairmen of defective region.     

Synthesis of ultrathin semicircle-shaped copper nanowires in ethanol solution for low haze flexible transparent conductors

Nano Research - Copper nanowires (CuNWs) are becoming an indispensable item for next-generation transparent optical devices due to their excellent conductivity and transparency. In this work,...