SoC处理器的时钟生成器：电路和体系结构

本书涵盖了面向SoC（System　on　Chip，片上系统）处理器的集成综合器电路设计的论题，采取了一种更为全局的设计观念来考察电路级和体系结构级的设计空间。书中的论述十分广泛，而且包括电路理论和锁相环反馈控制理论的综述。在电路级方面，讨论包括深亚微米数字CMOS过程的低功耗模拟设计、供电噪声效应、设备噪声；在体系结构级方面的论述，涵盖了连续时间和离散时间模型的锁相环分析，以及锁相行为的细节分析。还有一些章节对特定的时钟生成器模块做了电路级和系统结构级的深入描述，其中包括高供电噪声屏蔽的锁相环电路、体系结构和数字锁相环体系结构，考察了为离散时间模拟部件产生低失真采样时钟的方法。这里所说的锁相环包括希格马．代尔塔N分锁相环、直接数字综合（DDS、Direct　Digital　Synthesis）技术和锁相环的非常规应用。本书讨论的面向测试的设计（Dvr、Design　for　Test），其中包括锁相环的精确测量滤波器方法和嵌人式测试（BIST、Built—in—self-test）技术。     

Depositional history of the early part of the Jurassic succession on the Rajasthan Shelf, western India

Part of the lowermost deposits of the Triassic to Earlymid Jurassic (up to Bajocian) sedimentary succession spread across the Rajasthan shelf on the western part of the Indian craton is found in the Jaisalmer Basin east of Jaisalmer with the best exposed sections along the Jodhpur-Jaisalmer Highway. Based on lithostratigraphic characteristics, the succession is divided into four: Odania and Thaiat members, Lathi Formation; and Hamira and Joyan members, Jaisalmer Formation. Six facies are defined from microfacies, sedimentary structures, biotic components and depositional environments: (1) ferruginous, pebbly, cross-bedded sandstone—high-energy, fluvial; (2) cross-bedded, poorly sorted, fossil wood-bearing sandstone—highenergy, terrestrial, with high influx of sediment and warm and humid climate; (3) cross-bedded to rarely bioturbated, alternating silt to fine-grained sandstone—fluctuating sedimentation rates and energy—nearshore, mesohaline embayment to lagoonal; (4) partly bioturbated, storm-dominated, mixed siliciclastic-carbonate facies—fully marine; (5) low angle cross-laminated, silt to fine-grained sandstone—nearshore shallow water, above fair weather wave base; and (6) thick rudstones with mega-ripples and reworked coral heads-storm deposits representing the peak of first major marine transgression across the basin.     

A role for mitochondria in NLRP3 inflammasome activation

An inflammatory response initiated by the NLRP3 inflammasome is triggered by a variety of situations of host 'danger', including infection and metabolic dysregulation. Previous studies suggested that NLRP3 inflammasome activity is negatively regulated by autophagy and positively regulated by reactive oxygen species (ROS) derived from an uncharacterized organelle. Here we show that mitophagy/autophagy blockade leads to the accumulation of damaged, ROS-generating mitochondria, and this in turn activates the NLRP3 inflammasome. Resting NLRP3 localizes to endoplasmic reticulum structures, whereas on inflammasome activation both NLRP3 and its adaptor ASC redistribute to the perinuclear space where they co-localize with endoplasmic reticulum and mitochondria organelle clusters. Notably, both ROS generation and inflammasome activation are suppressed when mitochondrial activity is dysregulated by inhibition of the voltage-dependent anion channel. This indicates that NLRP3 inflammasome senses mitochondrial dysfunction and may explain the frequent association of mitochondrial damage with inflammatory diseases.     

纤维对PEI改性环氧树脂单向复合材料形态的影响

人们改善环氧树脂基复合材料的脆性通常只改善环氧树脂基体和增强纤维间的界面，提高环氧树脂韧性的另一种常用方法是添加初始相容性良好的热塑性树脂如聚醚酰亚胺，在某一转化率（取决于体系的组成和反应温度）时体系发生相转变，体系最终的形态由相转变速率和环氧树脂反应速度所控制。本文作者研究了两种增强纤维（玻璃纤维和碳纤维）对不同环氧树脂／聚醚酰亚爱体系形态形成的影响，结果发现体系中纤维的存在不会影响基体相分离过程，但会改变体系的最终形态；形态的变化与纤维的品种关系不大；基体中不同组分的粘度是影响复合材料形态形成的关键因素。     

Advances and applications of electrohydrodynamics

Electrohydrodynamics (EHD) has been applied in many areas, such as EHD enhanced heat transfer, EHD pump, electrospray mass spectrometry, electrospray nanotechnology, etc. The basic theories underlying these applications and a brief review of the EHD advances are presented in this paper. As electrospray is an important branch of EHD,the applications of electrospray are particularly discussed.Finally, this paper gives some suggestions for the future research and development.     

Design and fabrication of 1-D semiconductor nanomaterials for high-performance photovoltaics

To date, the cost-effective utilization of solar energy by photovoltaics for large-scale deployment remains challenging. Further cost minimization and efficiency maximization, through reduction of material consumption, simplification of device fabrication as well as optimization of device structure and geometry, are required. The usage of 1D nanomaterials is attractive due to the outstanding light coupling effect, the ease of fabrication, and integration with one-dimensional(1-D) semiconductor materials. The light absorption efficiency can be enhanced significantly, and the corresponding light-toelectricity conversion efficiency can be as high as their bulk counterparts. Also, the amount of active materials used can be reduced. This review summarizes the recent development of 1-D nanomaterials for photovoltaic applications, including the anti-reflection, the light absorption,the minority diffusion, and the semiconductor junction properties. With solid progress and prospect shown in the past 10 years, 1-D semiconductor nanomaterials are attractive and promising for the realization of high-efficiency and low-cost solar cells.     

1800mm虚拟轧机板形控制性能

定义了评价轧机板形控制性能的六项指标,包括承载辊缝凸度调节域、辊缝横向刚度、板形调控功效曲线、边缘降、辊间接触压力平均幅值和辊间接触压力分布不均匀度.建立了HC,CVC,PC和DSR系列轧机的有限元仿真模型,并从板形控制性能的六项指标方面分析了当前国际上流行的各种机型的特点.     

云南保山盆地生物气源岩生物标志化合物特征

通过对保山盆地气源岩有机质饱和烃色谱、三环萜烷、四环萜烷、五环三萜烷及甾烷分布特征的研究,发现气源岩有机质碳数分布存在比较明显的奇碳优势,结合R.数据,认为该区气源岩成熟度很低;可溶有机质生物标志化合物中的三环萜烷、四环萜烷含量低,五环三萜烷中有含量十分丰富的生物藿烷,表明源岩成熟度低;还检测出与细菌作用有关的C<,3...     

BP神经网络在入侵检测中的应用

对如何检测未知入侵手段的问题进行了探讨．在被监测程序输入条件已知情况下，借助程序行为简档，给出了一种基于BP神经网络的入侵检测方法，阐述了所用BP神经网络的基本结构以及训练方法，最后在LINUX环境下进行了实验验证．结果表明，在程序行为简档内容比较清晰的条件下，运用BP神经网络检测入侵，可在一定程度上提高入侵检测系统的难确检测率．