多通道脉冲分光颜色测量系统

开采一种采用脉部缶灯光源照明，多元阵列光纤作为多通道接收器的光纤型脉冲多通道快速分光颜色测量系统。该仪器的色分辨率高，动态范围大，色品坐标精度为０．００２，测量光谱范围为３８０ｎｍ－７８０ｎｍ，光谱分辨率为１０ｎｍ，测量时间为几个ｍｓ，测量时间间隔小于５ｓ，能测量较暗物体的颜色，也能进行荧光物体的颜色测量和脉冲光源的相对光谱功率分布的测量，并能给出各种标准照明体和各种色度系统下的色度参数。     

厦门—金门海域表层沉积物中HCHs,DDTs和PCBs的含量与分布

１９９５年１０月对厦门－金门海域表层沉积物中的有机氯农药（ＨＣＨｓ和ＤＤＴｓ）及多氯联苯（ＰＣＢｓ）的含量与分布进行调查研究，ＨＣＨｓ，ＤＤＴｓ和ＰＣＢｓ的含量范围分别为０．０３～０．４８ｍｇ／ｇ，２．９７～９．１６ｎｇ／ｇ和０．０２～０．１１ｎｇ／ｇ对其分布形式，残留水平以及组成等进行了评价与探讨，结果表明，厦门－金门海域基本上未受到ＨＣＨｓ和ＰＣＢｓ的污染，只受到ＤＤＴ的轻度污染，但是，ＤＤＴ     

厦门－金门海域表层沉积物中HCHs、DDTs和PCBs的含量与分布

１９９５年１０月对厦门－金门海域表层沉积物中的有机氯农药（ＨＣＨｓ和ＤＤＴｓ）及多氯联苯（ＰＣＢｓ）的含量与分布进行调查研究．ＨＣＨｓ、ＤＤＴｓ和ＰＣＢｓ的含量范围分别为０．０３～０．４８ｎｇ／ｇ、２．９７～９．１６ｎｇ／ｇ和０．０２～０．１１ｎｇ／ｇ．对其分布形式、残留水平以及组成等进行了评价与探讨．结果表明，厦门－金门海域基本上未受到ＨＣＨｓ和ＰＣＢｓ的污染，只受到ＤＤＴ的轻度污染．但是，ＤＤＴ近期仍有输入，新的污染源尚未根除．     

一种基于虚拟仪器概念的数字示波器的实现方法

提出了一种基于虚拟仪器概念的数字存储示波器的实现方法，整个系统由基于ＰＣ／ＡＴ总线的双踪数字存储示波卡及基于中文Ｗｉｎｄｏｗｓ３．２的虚拟操作控制面板组成。     

多通道虚拟超声检测系统研究

多通道虚拟超声检测系统由计算机、３块ＰＣ插卡（多通道超声发射／接收卡、超声图像卡与步进电机驱动卡）、聚焦探头和机械系统组成,能够实现,Ａ、Ｂ、Ｃ扫描成像,数据处理,缺陷定位,定性和定量分析,将计算机技术,虚拟仪器技术,信号和图像处理技术引入超声无损检测领域,拓宽了传统超声检测的应用范围。     

用超临界流体萃取方法处理多氯联苯污染物

测定了三种多氯联苯（ＰＣＢｓ）同系物：４，４’－二氯联苯，２，３’，４’，５－四氯联苯，２，２’，３，３’，４，４’－六氯联苯在超临界ＣＯ２中的溶解度。实验是用静法在一个带可视窗的高压平衡池内进行。实验的压力为９～４５ＭＰａ，温度为３０８．１～３２９．１Ｋ。同时研究了用超临界流体萃取技术处理被ＰＣＢｓ污染的固体物的方法。测定其萃取ＰＣＢｓ的传质速率及有效性，实验压力为７．５～６０ＭＰａ，实验温度为３０５．５～３１３．１Ｋ．ＣＯ２流率为０．７ｇ／ｓ。     

MEMS动态测试中频闪同步控制系统

频闪同步控制系统是微机电系统(MEMS)动态测试系统中的重要组成部分．为了满足MEMS发展对测试系统的需求，基于频闪成像技术，设计了一套频闪同步控制系统，用于采集高速运动的MEMS器件的清晰图像．系统采用虚拟仪器方式，通过软件控制波形发生器生成各类逻辑控制信号，驱动CCD摄像机、光源和图像采集卡等设备协调工作．实验表明，测量平面运动时，系统在50倍放大倍率下，可测器件运动速度达5．1m／s，测量分辨率优于180nm，测量重复性为40nm。     

TSP5220语音合成系统

研究了语音合成芯片ＴＳＰ５２２０的合成原理及使用方法，设计并实现了由ＩＢＭ／ＰＣ机及ＴＳＰ５２２０组成的语音合成系统。该系统合成的语音具有较好的可懂性和自然度，且速率仅为１～１．７ｋｂ／ｓ，与６４ｋｂ／ｓＰＣＭ相比较，大大降低了存储语音所需的容量     

各种速率矢量和激励线性预测（VSELP）编码器的实现

研究并改进了矢量和激励线性预测，语音编码器，介绍了８ｋｂｉｔ／ｓＶＳＥＬＰ编码方案的实现及在此基础上利用矢量量化ＬＰＣ参数，减少激励码本数和子块分裂等方法；改进的６．４ｋｂｉｔ／ｓ，４．８ｋｂｉｔ／ｓ及２．４ｋｂｉｔ／ｓ ＶＳＥＬＰ的方案和结果。     

一种在微计算机上实现数字示波器功能的方法

介绍了在微计算机上加装多通道A／D转换卡以构成多通道信号采集系统的方法，并设计了一套专门的对数据进行处理的软件，可在微计算机上实现数字示波器的功能，该装置可在一定程度上实现信号测量、波形显示、数据存储等功能，特别是在被测信号频率很低时是一种非常好的慢扫描示波器．     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the