BT16钛合金紧固件加工工艺分析

分析了不同规格俄制BT16钛合金自锁螺母显微组织、流线和显微硬度，并与俄制该合金φ8min丝材进行对比。研究结果表明：BT16钛合金紧固件显微组织为单相区变形获得的超细片状组织；其组织形态与退火态丝材一致，表明紧固件是在退火状态下直接使用的，未经过固溶时效强化处理；BT16钛合金紧固件采用了冷变形制造工艺。     

基于ARM Cortex-M0+KL系列MCU的构件化汇编框架研究

ARM Cortex-M0+是2012年新发布的一款将逐步8位/16位微处理器市场的32位低功耗、高性能处理器,规范的汇编框架与样例是一个新微处理器深层次应用开发的基础。鉴于目前ARM Cortex-M0+的汇编程序资料与样例程序十分匮乏,加之汇编设计的复杂性,在充分分析ARM Cortex-M0+汇编寻址方式与指令系统的基础上,以Freescale半导体公司于2013年正式发布的ARM Cortex-M0+KL系列MCU为蓝本,基于CW10.3开发环境,结合软件构件设计思想,提出构件化ARM Cortex-M0+汇编框架,并编制GPIO汇编构件,给出应用实例。旨在降低读者学习ARM Cortex-M0+汇编程序的难度,完成第一个ARM Cortex-M0+规范化汇编程序。     

Single display gamut size metric

To measure the relative gamut sizes of wide‐gamut displays, it is herein proposed that the CIE 1931 xy chromaticity diagram be used rather than the nominally perceptually uniform CIE 1976 u′v′ chromaticity diagram. High correlations were found between the area‐coverage ratios in the xy diagram and the volume‐coverage ratios in the CIE 1976 L^*a^*b^* color space for major standard wide‐gamut color spaces. It is also demonstrated herein that performing planimetry in the uniform u′v′ diagram does not yield accurate relative display gamut sizes, even though the large sizes obtained using the u′v′ diagram are often reported regardless of the fact that its uniformity is valid only when the luminance factor is constant. The single display gamut size metric using the xy diagram will facilitate the unbiased development of wide‐gamut displays.     

水利工程试行BT建设管理模式关键问题研究

BT模式融资建设水利工程,是水利投融资体制的创新.在实践中,建设管理主体的定位、投融资及项目回购等问题必须高度重视,须采取相应的策略和措施,理顺和解决相关问题.     

BT模式在水利基础设施建设中的应用及风险防范

从建设—移交模式(BT)的涵义谈起,描述了中国现阶段BT水利项目发展的良好势态,分析了采用BT模式建设的巨大优势。结合水利工程的特点,从建设单位的角度出发,阐述了BT模式应用的潜在风险,并针对潜在的风险提出应对措施,以最大程度地降低风险所带来的损失。     

基于HTMLParser的BT种子网页信息抽取

通过采用相对路径方法结合节点内容特征进行信息定位,利用HTMLParser解析器的信息转化功能对定位的信息块进行预处理,总结出抽取规则,实现了BT种子网页信息抽取,并以此建立了一种针对BT种子信息的抽取模型。     

A -based optimal finite-word-length controller design

A novel optimal Finite Word Length (FWL) controller design is proposed in the framework of μ theory. A computationally tractable close-loop stability measure with FWL implementation considerations of the controller is derived based on the μ theory, and the optimal FWL controller realizations are obtained by solving the resulting optimal FWL realization problem using linear matrix inequality techniques.     

基于P2P的点播服务系统的设计

P2P技术是一种比较成熟的技术,在实际中有着广泛的应用。通过分析研究常见P2P技术的应用即视频直播和文件传输,结合实际需求将视频点播系统与P2P技术相关联,提出了一种基于P2P技术的边下边看的视频点播系统。阐述了系统的构成,对服务器端视频文件格式,客户端结点的选取和存储空间的开辟等问题进行了分析讨论。     

Invariance properties of RAMS and linear time

An operation on integers isLTTC if it is computable in linear time on a Turing machine (using the dyadic or binary representation of integers). AnLTTC-RAM (respectivelyI-RAM) is a RAM which only uses LTTC operations (respectively operations in the setI).The address-free time complexity measure of a RAM evaluates execution times using the logarithmic cost criterion but assumes that addressing operations are performed for free.     

Circuits constructed with MOD q gates cannot compute “AND” in sublinear size

Algebraic techniques are used to prove that any circuit constructed with MOD _q gates that computes the AND function must use (n) gates at the first level. The best bound previously known to be valid for arbitraryq was (logn).