高速大容量固态存储系统的设计

针对高分辨率合成孔径雷达大数据率与数传设备数据下传带宽有限矛盾,提出了一种高速大容量固态存储器的设计,是解决该矛盾的有效方案.该存储器采用DDR SDRAM实现,并利用FPGA内部的Rocket IO接收数据,提高了电路板的集成度,同时具有很好的拓展性.仿真实验表明该固态存储器模块设计方案具有好的可实现性.     

基于线性光耦HCNR201和RS-422的固态存储器的设计与实现

设计一种基于线性光耦HCNR201和RS-422总线接口的新型采集存储固态存储器,用于实现模拟量的采集和数字量的接收。采用HCNR201构成光耦隔离电路隔离2路0~5V模拟电压,由FPGA控制AD对其采编,同时应用RS-422接口电路接收1路PCM码流数据,将其混合编帧后转存写入FLASH中。重点阐述了固态存储器的硬件电路设计、FPGA逻辑设计与关键技术的解决方案。实际测试表明,该固态存储器能够准确采集接收2路模拟量与1路PCM数字量信号,存储数据完整可靠。     

基于立方体纳卫星的软件错误检测与纠正设计

针对目前立方体纳卫星系统设计可靠性低,卫星上数据较容易受到太空单粒子效应影响发生错误导致卫星软件出现故障,该文提出在立方体纳卫星存储器中应用错误检测与纠正(Error detection and correction,EDAC)容错技术方法。该方法基于u COS实时操作系统,通过软件实现EDAC对存储器数据检错纠错,建立周期性检测任务,提高存储器数据的可靠性。通过仿真分析了错误检测与纠正方法对存储器数据的可靠性影响,通过故障注入实验证明,该方法能够完成数据的可靠性存储,满足预期的设计指标。该方法可以在立方体纳卫星系统的存储器可靠性设计中应用。     

基于FPGA的高速大容量固态存储设备数据ECC的设计与实现

针对目前高速大容量固态存储设备中,影响数据存储可靠性的错"位"问题,设计和实现了一种基于FPGA的专用ECC (Error correction code)纠错方法.在读、写操作时分别对存储数据的行和列生成校验码,通过比较两次操作的校验码,对错"位"进行精确定位和纠错,纠错能力为1 bit/512 B.相比传统纠错算法,ECC纠错方法电路实现简洁,纠错能力强,易于硬件实现.实际运行结果表明,设计完全满足高速数据记录的需求,为大容量数据存储器的可靠性提供了重要保障.     

程序可远程升级的数据采集终端的设计

针对数据采集终端的软件远程升级和维护困难的问题,提出一种程序可远程升级的数据采集终端软件的软硬件设计实现方案.硬件上设计升级程序接收存储器和升级过程状态存储器电路,并通过系统软件设计保证远程升级的可靠性.     

某飞行器遥测系统固态存储器及其地面检测系统设计

论述了用于某飞行器遥测系统的固态存储器及其地面检测系统的设计思想、技术方案和工作原理,并给出了部分实弹试验结果.实弹试验结果表明,该系统设计方案合理、抗干扰性能强,操作简便.     

基于FPGA的高速固态存储器的设计与实现

针对目前存储器在航天、通讯、气象等方面的需求,本文提出了一种新型固态存储器。它使用可编程逻辑器件FPGA作为控制核心,使用数模混合编帧技术同时进行多路数字量、模拟量和脉冲信号的存储,存储部分采用三星公司的Nano Flash作为存储介质,通过双平面技术和流水线技术的混合使用,极大的提高了原有的存数效率,达到了预期的设计要求。     

基于PAL的图像数据存储技术研究

针对弹载图像采集系统设计中存在无法准确稳定存储高速数据流,而导致图像信息记录和存储的可靠性严重降低的问题,设计了一种基于PAL制图像数据的无延时存储方法。通过采用乒乓缓存设计和流水线结构方式,解决了高速图像数据输出和串口Flash存储器的低写入速度不匹配的问题。通过实验分析验证,设计能够解决高低速存储介质中速度匹配问题,实现对高速图像数据的精确存储和记录,为后期图像恢复提供了可靠的数据。     

某飞行器遥测系统固态存储器及其地面检测系统设计

论述了用于某飞行器遥测系统的固态存储器及其地面检测系统的设计思想、技术方案和工作原理，并给出了部分实弹试验结果．实弹试验结果表明，该系统设计方案合理、抗干扰性能强，操作简便．     

基于DSP的高精度电度表的可靠性设计

本文介绍了采用DSP技术的高精度电度表的可靠性设计方案,通过对电源回路、电路板设计、信号传递、复位电路、存储器的实时测试、中断程序的调用等几方面进行抗干扰设计,使系统的可靠性达到了设计要求。     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.