高性能2.5Gbps PCI Express并串转换电路的设计

并串转换电路作为PCI Express物理层（PHY）发送端的重要模块之一，将来自PCS（Physical coding sublayer）子层的10bit并行数据转换成1bit串行数据．该文提出并实现了一种高性能并串转换电路，采用0．18μm工艺版图实现，反标寄生参数后使用spice进行仿真，仿真结果证明该电路可在1．0GHz～1．5GHz稳定工作，其最高数据传输速度达到3Gbps，完全达到了预期效果．     

千兆以太网卡芯片数模转换电路的设计与实现

给出了6bit分辨率、10bit精度的千兆以太网卡芯片数模转换电路,包括体系结构设计、电路设计与仿真、版图设计．该数模转换电路经过TSMC 0．13μm 1P8M CMOS工艺验证,工作电压为1．5V／2．7V．芯片测试结果表明该数模转换电路能够满足千兆以太网卡芯片的性能要求．     

集成电路分析－识别系统的研究

本文提出了集成电路芯片分析－识别系统的设计思想，并详细论述了版图－电路提取软件和电路拓扑结构检查软件的功能和算法特点．     

0．18-μm CMOS千兆以太网并串转换芯片设计

提出了一种新的树型结构 1 0∶1并串转换电路 ,可应用于千兆以太网 ,其工作速度达到 1 2 5Gbit/s.树型结构的使用可以使大部分电路工作在较低的速率上 ,从而简化了设计 ,也减小了功耗 .低速 5∶1并串转换单元采用改进的并行结构 ,利用一系列D触发器调整进入数据选择器的时钟和数据间的相位关系 ,使其相对于普通并行结构有更大的相位裕量 ,可以更可靠地工作 .芯片应用TSMC 0 1 8 μmCMOS工艺实现 ,芯片面积为 0 7mm× 0 5mm ,核心电路功耗为 3 6mW ,小于同类电路 .     

采用标准单元的集成电路自动布图设计系统

采用标准单元方法的集成电路设计系统是一个用于专用集成电路（ＡＳＩＣ）设计的自动布图系统。本系统建有 ３ｕｍ硅栅 ＣＭＯＳ标准单元库，设计人员只要输入被设计电 路的逻辑图（或逻辑网单文件），或逻辑模拟的输入文件，该系统就自动调用所需的单元和压煤块，进行自动布局和自动布线，最后得到电路的掩膜版图。设计实例表明，该系统使半定制电路的设计过程加快，但仍保持较高的芯片密度。     

千兆以太网物理层时钟产生/倍频单片集成电路设计

给出了一个基于TSMC 0.18 μm CMOS工艺设计的千兆以太网物理层时钟产生/倍频单片集成电路.芯片采用电荷泵结构的锁相环实现,包括环形压控振荡器、分频器、鉴频鉴相器、电荷泵和环路滤波器等模块,总面积为1.1 mm×0.8 mm.采用1.8 V单电源供电,测得在负载为50 Ω时电路的输出功率大于5 dBm.芯片在PCB板上键合实现锁相环路的闭环测试,测得锁定范围为130 MHz;当环路锁定在1 GHz时,振荡器输出信号的占空比为50.4%,rms抖动为5.4 ps,单边带相位噪声为-124 dBc/Hz@10 MHz.该电路适当调整可应用于千兆以太网IEEE802.3规范 1000BASE-X的物理层发信机设计.     

基于FPGA设计的电视信号检测方法与实现

文章提出了利用信号时序检测方法监测电视信号的播出中断和非法干扰,采用FPGA设计实现对32路电视同步信号的实时检测,并依此设计出一个电视信号自动监测与报警系统;系统使用Verilog HDL语言进行硬件电路描述,使用Xilinx ISE9.1软件和ModelSim6.2仿真工具对FPGA设计进行配置和仿真,给出了硬件模块设计和部分软件代码;实验结果表明,系统达到了实用要求。     

0．6μm CMOS工艺串行接口电路设计

采用0．6VmCMOS工艺设计了AES加密模块的串行接口单元电路，提高了AES加密芯片的数据吞吐量。基于CMOS互补逻辑的电路结构降低了的功耗，实现了与核心电路的电平匹配。全定制的设计方法优化了电路性能和版图面积，提高了设计可靠性，降低了研究成本。     

基于ADS仿真的高线性CMOS混频器设计

提出了一种提高混频器线性度的方法：采用交叉差分的结构取代原有的混频器结构．改进后,输出信号的三次谐波会被消除,混频器的三阶截止点也得到改善．混频器工作电压1．8V,射频信号5GHz,电路采用0．18μm CMOS工艺,使用Agilent公司的先进设计系统ADS（advanced design system）对电路进行仿真设计．仿真结果表明,经过改善后,混频器IP3提高3．5dB（线性度提高）,转换增益提高4．8dB．     

4GHz微波低噪放大器的设计与仿真

文中介绍了一种基于GaAsMESFET的微波低噪放大器的设计方法。结合微波电路设计理论与仿真软件ADS2006对电路进行仿真和优化使电路在全频带内绝对稳定,原理图仿真指标达到较满意的结果,其中增益为15．112dB,噪声1．371dB。设计电路版图并对其进行协同仿真（co-simulation）,并与原理图仿真结果进行比较和分析。该放大器可广泛应用于无线通信系统中。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to