钢筋混凝土框架结构施工技术

对多层框架结构施工过程中遇到的技术问题及解决方案进行论述,对做好类似工程的施工技术工作具有借鉴意义。     

220 kV春平甲线电力电缆外护套绝缘缺陷分析

介绍了长春地区220 kV春平甲线电力电缆基本概况及其外护套绝缘缺陷,对电缆运行情况做了词研与分析,通过实测春平甲线电缆测试数据,提出电缆运行负荷不超过额定负荷60％,提高电缆运行环境等解决方案,以保证电缆线路安全运行。     

Edge induced band bending in van der Waals heterojunctions: A first principle study

Nano Research - The dangling bond free nature of two-dimensional (2D) material surface/interface makes van der Waals (vdW) heterostructure attractive for novel electronic and optoelectronic...     

两步固相法合成具有优良性能的钛酸锂

采用两步固相法,在交替气氛煅烧(空气预烧,氮气煅烧)下合成了尖晶石钛酸锂粉末,并且研究了煅烧气氛(空气和氮气)对不同合成阶段(预烧和煅烧)的影响。电化学测试结果表明,经空气预烧,氮气煅烧得到的样品在5 C的电流密度下,首次充电比容量高达128 m Ah/g,100次循环后容量保持率达94.5%,其电化学性能明显优于单一气氛煅烧下所得样品。分析其原因为碳酸锂的分解反应在空气气氛下较氮气气氛下更容易进行,且氮气气氛下合成LTO有氧空位的存在。     

Analysis and design of a MEMS DC/DC converter

This paper presents the analysis and simulation of a microelectromechanical system (MEMS) DC/DC converter based on vibration‐to‐electric energy conversion. The device transfers and accumulates the mechanical energy from ambient vibration via a variable capacitor. After the key parameters of the device are carefully discussed, the dynamics analysis is given based on the differential equation of the system. The approach provided in this paper is very helpful in designing and essentially understanding the MEMS DC/DC converter with high performance. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

塑料用于汽车消音技术

图1高密度结构性泡沫用在凯迪拉克2004年款SRX型车A型柱和纵向杆内,有助于降低路面与底盘之间的噪音、振动和刺耳声(来源:陶氏化学公司)图2微孔聚氨酯泡沫制成的弹簧支承物,应用在汽车的悬挂系统中可起消音作用(来源:德国E-lastogran公司)塑料制汽车部件以多个方面的性能优势而     

采用逐级配准和分值加权的指纹匹配算法

为将2个细节点集高效而准确地配准,首先利用与细节点相关联的短脊线对细节点组合进行初选,然后采用局部特征结构匹配精选出5对细节点作为配准的候选对应点.在2个细节点集配准后的匹配中,针对采用弹性匹配算法经常出现的细节点错配的情况,提出根据匹配可信度对各匹配对的匹配分值进行加权处理,以降低其对匹配精度的影响.采用FVC2002公布的指纹库进行对比实验,结果表明该算法在匹配效率和准确性上都有明显的提高.     

An Innovative Customized Biomimetic Hydrogel for Drug Screening Application Potential: Biocompatibility and Cell Invasion Ability

The ability of Pluronic F127 (PF127) conjugated with tetrapeptide Gly-Arg-Gly-Asp (GRGD) as a sequence of Arg-Gly-Asp (RGD) peptide to form the investigated potential hydrogel (hereafter referred to as 3DG bioformer (3BE)) to produce spheroid, biocompatibility, and cell invasion ability, was assessed in this study. The fibroblast cell line (NIH 3T3), osteoblast cell line (MG-63), and human breast cancer cell line (MCF-7) were cultured in the 3BE hydrogel and commercial product (Matrigel) for comparison. The morphology of spheroid formation was evaluated via optical microscopy. The cell viability was observed through cell counting Kit-8 assay, and cell invasion was investigated via Boyden chamber assay. Analytical results indicated that 3BE exhibited lower spheroid formation than Matrigel. However, the 3BE appeared biocompatible to NIH 3T3, MG-63, and MCF-7 cells. Moreover, cell invasion ability and cell survival rate after invasion through the 3BE was displayed to be comparable to Matrigel. Thus, these findings demonstrate that the 3BE hydrogel has a great potential as an alternative to a three-dimensional cell culture for drug screening applications.