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81.
With the introduction of multichannel video programming distributors and different types of video platforms, consumers have more choices of channels and platforms than ever. Specifically, the present study focuses on television and the Internet as video platforms. 相似文献
82.
Suk-Keun Cha Jeong-Hoon Lee Joon Jae Yoo Jung Hoon Kang Han Gyu Kim Dong Hoon Kim Jun Yeob Song 《测试科学与仪器》2010,(Z1):192-198
<正>The first tier of automotive manufacturers has faced to pressures about move,modify,updating tasks for manufacturing resources in production processes from demand response of production order sequence for motor company and process innovation purpose for productivity. For meets this requirements,it has to require absolutely lead time to re-wiring of physical interface for production equipment,needs for change existing program and test over again.For prepare this constraints,it needs studying an auto-configuration functions that build for both visibility and flexibility based on the 4M(Man,Machine,Material, Method)group management which is supports from WSN (Wireless Sensor Network)of the open embedded device called M2M(Machine to Machine)and major functions of middleware including point manager for real-time device communication,real-time data management,Standard API (Application Program Interface)and application template management.To be application system to RMS (Reconfigurable Manufacturing System)for rapidly response from various orders and model from motor company that is beginning to establishing the mapping of manufacturing resources of 4M using WSN. 相似文献
83.
In this letter, we propose a data randomization scheme for endurance and interference mitigation of deeply‐scaled multilevel flash memory. We address the relationships between data patterns and the raw bit error rate. An on‐chip pseudorandom generator composed of an address‐based seed location decoder is developed and evaluated with respect to uniformity. Experiments performed with 2x‐nm and 4x‐nm NAND flash memory devices illustrate the effectiveness of our scheme. The results show that the error rate is reduced up to 86% compared to that of a conventional cycling scheme. Accordingly, the endurance phenomenon can be mitigated through analysis of interference that causes tech shrinkage. 相似文献
84.
Ching-Chang Cho Chieh-Li Chen Cha’o-Kuang Chen 《International Journal of Heat and Mass Transfer》2012,55(11-12):2926-2933
A novel method is proposed for enhancing the mixing performance in a crisscross micromixer by means of aperiodic time-varying electrokinetic perturbing flows. In the proposed approach, the aperiodic oscillating source used to modulate the perturbing electric potential is derived using the Sprott system. The effects of the perturbation conditions and micromixer geometry parameters on the fluid flow characteristics and mixing performance are analyzed by means of numerical simulations. The results show that irregularly-alternating flow recirculation structures are induced within the lateral channels of the micromixer, which cause a repeated stretching and folding of the species streams in the main channel and enhance the mixing performance as a result. It is shown that an effective improvement in the mixing performance can be obtained through a suitable specification of the scaling factor in the Sprott system. Furthermore, it is shown that the mixing performance can be further enhanced by assigning suitable values to the micromixer geometry parameters or by reducing the ratio of the main channel flow velocity to the lateral channel flow velocity. Overall, the numerical results show that an average mixing efficiency of more than 90% can be obtained by specifying the scaling factor in the Sprott system as 7.5, the ratio of the main channel velocity to the lateral channel velocity as 0.25, the separation distance between the lateral channels as equal to half the width of the main channel, and the width of the lateral channels as equal to the width of the main channel. 相似文献
85.
Artemisia lavandulaefolia has been utilized in traditional medicines for the treatment of several diseases. In this study, we attempted to determine
whether the essential oil and 1,8-cineole of A. lavandulaefolia induce apoptosis in KB cells. The oil and 1,8-cineole induced the cell death of KB cells as evidenced by the increased cell
population in the sub-G1 phase, the appearance of condensed and/or fragmented nuclei, and the generation of a cleaved PARP
product. The treatment of the cells with the oil also induced changes in the mitochondrial level of Bcl-2 and Bax, thereby
inducing the release of cytochrome c into the cytosol. Furthermore, the oil increased the phosphorylation of extracellular signal-regulated kinase (ERK), c-jun
N-terminal kinase, and p38 MAPK, but 1,8-cineole activated pp38 and pJNK at the same concentrations. These findings show that
the mitochondrial and MAPKs pathways might be involved in the oil-induced apoptosis, and may enhance our current understanding
of the anticancer functions of the oil to a greater degree than 1,8-cineole. 相似文献
86.
Ui-Su Im Jiyoung Kim Seon Ho Lee Byung-Rok Lee Dong-Hyun Peck Doo-Hwan Jung 《JOM Journal of the Minerals, Metals and Materials Society》2017,69(12):2460-2466
In the present study, surface texture features and chemical properties of two types of cokes, made from coal tar by either 1-stage heat treatment or 2-stage heat treatment, were researched. The relationship between surface texture characteristics and the chemical properties was identified through molecular weight distribution, insolubility of coal tar, weight loss with temperature increase, coking yield, and polarized light microscope analysis. Rapidly cleared anisotropy texture in cokes was observed in accordance with the coking temperature rise. Quinoline insolubility and toluene insolubility of coal tar increased with a corresponding increases in coking temperature. In particular, the cokes produced by the 2-stage heat treatment (2S-C) showed surface structure of needle cokes at a temperature approximately 50°C lower than the 1-stage heat treatment (1S-C). Additionally, the coking yield of 2S-C increased by approximately 14% in comparison with 1S-C. 相似文献
87.
本文阐述了构建安全体系结构的意义,以及安全体系结构所包括的主要内容.重点以企业网为例介绍了应当如何根据自身实际,以安全体系为指导,构建其安全防护体系. 相似文献
88.
A micro-viscometer for measuring viscosity change in small amount of liquid in real time has been proposed recently. The advantages of the device are the use of minimal liquid and maximized sensitivity for measuring viscosity. However, in previous research, even though the multi-physical simulation including electrical, mechanical, and acoustical phenomenon is necessary for design of micro-viscometer, only acoustical aspects have been considered. Thus, combined physical phenomena could not be reflected for an optimum design process. In this research, a multi-physical approach is developed for designing a micro-viscometer, and an optimized micro-viscometer design is proposed. The proposed method is able to capture multi-physical phenomena such as near field effect and added mass effect. It also has the advantage of flexible design of various shape and materials, leading to savings of cost and time. 相似文献
89.
本文对在填困区一和布克赛尔县沙尔布尔山地区发现的铜矿化点的地质概况、矿物组合及地化元素组合特征进行了初步研究,并对矿化规律及矿化标志提出了认识,为今后进一步开展找矿工作提供依据. 相似文献
90.
察可文 《山东轻工业学院学报》1989,(Z2)
对于重积分的计算(主要是二重积分和三重积分的计算),在《数学分析》和《高等数学》的教科书中都有讲述。本文提出一种不用画几何图形而用解不等式组的代数方法,此法对n(n≥3)重积分和变更单积分的顺序更为有效。 相似文献