CMMI与组织文化变革

首先简要介绍了CMMI的概念以及两种不同的表现方式,并以分阶式为例,从CMMI实施的关键分析CMMI各级别所适配的组织文化,从现有国内大部分企业所存在的问题分析了组织过程改进需要进行的文化变革。     

CMMI与组织文化变革

首先简要介绍了CMMI的概念以及两种不同的表现方式，并以分阶式为例，从CMMI实施的关键分析CMMI各级别所适配的组织文化。从现有国内大部分企业所存在的问题分析了组织过程改进需要进行的文化变革。     

IDEAL算法在非稳态两相流问题中的性能分析

对于非稳态两相流问题,联立求解连续性方程和动量方程最为广泛使用的方法为：分步方法和SIMPLE系列算法。分步方法的优点是：收敛速度快,缺点是：初值问题条件稳定。SIMPLE系列算法优点是：初值问题绝对稳定,缺点是：收敛速度慢。为了克服传统的SIMPLE系列算法收敛速度慢这一缺点,本文引入了IDEAL算法。本文通过2个非稳态的两相流问题对SIMPLER和IDEAL两种不同算法在收敛速度方面进行了比较。通过比较可以看出IDEAL算法的收敛速度较SIMPLER算法得到了大幅提高,提高了约6~87倍,克服了传统SIMPLE系列算法收敛速度较慢的缺点,同时具有了初值问题绝对稳定和收敛速度快这两个优点。     

Actuation performance analysis of piezo-composite unimorph actuator with d33 actuation mechanism of piezo-electric ceramic layer

The performance improvement of the LIPCA (Lightweight Piezo-Composite curved Actuator) is investigated in this paper. The LIPCA is known as the best layered piezo-composite unimorph actuator because of not only high performance but also its flexible analytical design model and simple fabrication technique. Besides, originated from efforts to develop highly induced-strain piezoelectric ceramic, the IDEAL (Inter-Digitated Electrode Actuation Layer) have shown to be a potential candidate in unimorph or bimorph actuator designs. In a latest model of IDEAL designs, the inter-digitated electrodes (IDEs) had been proposed to be embedded directly into the piezoelectric ceramic wafer. Hence, the resulting stacked-type transducer is able to have full d₃₃ actuation mechanism which can produce almost twice larger strain than that produced by the conventional d₃₁ actuation mechanism. Therefore, by replacing the original actuation layer with IDEAL in the lay-up structure of the conventional LIPCA design, one can expect improvement to the performance of the actuator, e.g., gaining higher of out-of-plane actuation displacement. The modified design of LIPCA had been investigated considering mechanical properties of an inhomogeneous IDEAL. As the result, an IDEAL fabricated with low-elastic-modulus IDEs have shown to give considerably improvement on actuation performance of the LIPCA. Following that sense, a new homogenization model applied to the embedded IDEAL is proposed and able to convince the previously obtained result.     

IDEAL模型的研究

首先介绍了软件过程能力成熟度模型（SW－CMM）及其实施方法论IDEAL模型的概念,接着阐明了IDEAL模型各个阶段的目的、任务和软件过程改进的管理,举例说明了用PDCA周期实施软件过程改进,并对ICASE模型进行了简单说明。最后结合中国传统文化和信息时代的特点对SW－CMM实施方法论进行了若干讨论。     

Fast multiecho balanced SSFP metabolite mapping of 1H and hyperpolarized 13C compounds

Object  To investigate the feasibility of multiecho balanced steady-state free precession (bSSFP)-based fast chemical shift mapping hyperpolarized ¹³C metabolites. The overall goal was to reduce total imaging time and to increase spatial resolution compared to common chemical shift imaging (CSI). Materials and methods  A multiecho bSSFP sequence in combination with an iterative reconstruction algorithm was implemented. ¹H experiments were performed on phantoms and on a human volunteer in order to investigate the feasibility of the method on a system with metabolite maps that are known beforehand. ¹³C experiments were performed in vivo on pigs, where CSI images were acquired also for comparison. Results  Chemical shift images of three and four distinct ¹H resonance frequencies as well as chemical shift images of up to five hyperpolarized ¹³C metabolites were successfully obtained. Conclusion  Fast metabolite mapping based on multiecho balanced SSFP in combination with an iterative reconstruction approach could successfully separate several ¹H resonances and hyperpolarized ¹³C metabolites.     

如何实现智能家居环境下多传感器的联动

本文以智能家居为平台,通过对智能家居在国内发展趋势分析,说明理想的家通过多传感器的联动在不久的将来定会实现;以LED灯、窗帘、空调等为例,通过QT编程先实现单一传感器控制,最后又以空调、LED、直流电机、步进电机等实现了多传感联动的实现.     

Effects of inner iteration times on the performance of IDEAL algorithm

An efficient segregated algorithm for non-linear incompressible fluid flow and heat transfer problems, called IDEAL (Inner Doubly-Iterative Efficient Algorithm for Linked-Equations) for short, was proposed in reference [9]. Subsequently, it was extended to the 3D staggered/collocated grid systems. IDEAL includes inner doubly-iterative processes for solving pressure equations at each iteration level, and it could adjust the inner iteration times to control the convergence rate and the stability of iteration process, which is greatly different from other segregated algorithms. The objective of this paper is to analyze the effects of inner iteration times on the performance of IDEAL by four incompressible fluid flow problems, two of which belong to open systems, and the others refer to closed systems. It is found that: (1) the robustness of IDEAL is enhanced greatly with the increase of inner iteration times; (2) at the same time step multiple, the outer iteration number decreases with the increase of inner iteration times and the computation time is not related to the inner iteration times; (3) at the optimal time step multiple, the large inner iteration times of 4&4 and 7&7 could reduce the outer iteration number by about 70% and the computation time by about 40% over the small inner iteration times of 1&1.