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1.
ISD单片语音录/放器件及电路设计   总被引:1,自引:0,他引:1  
ISD单片语音器件的独特之处,是有用直接模拟存储技术,语音信号以其原本的模拟形式直接存入模拟量存储器中并长远保存。省去了传统的A/D和D/A数模转换机制,能高保真的将语音内容再生。这是一种高新录/放技术。另外,给出的ISD基本录/放电路十分简单易用。可方便地为微机系统、测控仪表、电器和广播等设备所采用,使设备具有高效功能。  相似文献   

2.
采用ADI干湿网格模式和一种大小区嵌套式的数值计算格式,考虑了天文潮与风暴潮的非线性耦合效应,对渤海局部海域的风暴潮漫滩进行了数值模拟。模拟结果与实测结果符合良好,证实ADI干湿网格模式对海湾风暴潮漫滩计算的可行性。指出ADI干湿网格模式对预报淹水受灾范围具有应用价值。  相似文献   

3.
南海及台湾海峡台风浪的数值计算研究   总被引:1,自引:0,他引:1  
廖康明  陆风山 《台湾海峡》1997,16(3):311-318
本文应用LAGFOFIO的建立第三代海浪模式,采用波数能谱直接模拟海浪谱的方法,进行南海及台湾海峡台风浪的后报和分析计算结果与实测值拟合较好,表明FIO-SOA方法适用于该海区台风浪的数值计算。  相似文献   

4.
中国科学院院士业治铮教授简介BRIEFINTRODUCTIONOFPROF.YEZHIZHENG,ANACADEMICIANOFACADEMIASINICA业治铮教授是我国著名的沉积学家,我国海洋地质科学的奠基人之一,中国科学院院士。现任中国海洋地质...  相似文献   

5.
关于龙门山区二叠纪灰岩飞来峰成因与时代的讨论DISCUSSIONSONORIGINANDTIMEOFPERMIANLIMESTONEKLIPPEINLONGMENMOUNTAINAREA四川龙门山地区二叠纪灰岩超覆在中晚侏罗世地层之上的事实,早在我国...  相似文献   

6.
黄勃  刘瑞玉 《海洋科学》1996,20(6):18-20
文章得到相建海、董金海以及邓景耀、李德尚、罗秉 征、唐启升、周名江研究员书面或口头上的帮助,在 此诚表谢意。 中国科学院海洋研究所调查研究报告第2935号。THE APPLICATIONS OF SYSTEM ANALYSIS METHODS IN FISHERYRESOURCES STUDY AND ECOLOGICAL ENVIROMENTAL ENGI-NEERING 系统理论与系统分析应用于渔业资源、生态环境工程始于60年代,现已成为定量研究渔业资源、生态环境工程必不可少的工具之一,并已为大家普遍接受。…  相似文献   

7.
UseofanewcloneofArtemiaparthenogenetica(OP1)toincreasegeneticvariation¥//INTRODUCTIONTherearepalthenogeneticandbiSexualrepndu...  相似文献   

8.
星载SSM/I微波遥感渤海海冰的辐射特征分析   总被引:2,自引:0,他引:2  
金亚秋 《海洋学报》1998,20(3):40-46
根据我国渤海区域星载微波遥感DMSP SSM/I1994 ̄1996年的观察数据的研究,指出现有的星载微波遥感海冰的数据标定和验证TBI和OSI算法是不适用的。用22和85GHz的散射指数SI和19GHz的极化指数PI,讨论了渤海区域海冰的主要辐射特征,用矢量辐射传输理论数值模拟了SI、PI与海冰覆盖及其厚度变化的定量关系,用SI-PI图规划了渤海区域性海冰的识别方法,给出了渤海海冰的空间分布及其辐  相似文献   

9.
盐生隐杆藻多糖的提纯及含量分析   总被引:9,自引:0,他引:9  
盐生隐杆藻(Aphanothecehalophytica)的培养液经透析醇析得胞外粗多糖EPI,藻细胞经热水抽提,醇析得胞内粗多糖IPI,它们均含有17种微量元素。EPI经脱蛋白,IPI经脱蛋白脱色得半精品EPⅡ和IPⅡ,半精品分别经DE-52和DEAE-Sephadex-A-25柱层析纯化得精品EPⅢ和IPⅢ。它们经纸层析,琼脂糖电泳和DEAE-Sephadex-A-25柱层析证明为同一组份。红  相似文献   

10.
金亚秋 《海洋学报》1998,20(3):40-46
根据我国渤海区域星载微波遥感DMSPSSM/I1994~1996年的观察数据的研究,指出现有的星载微波遥感海冰的数据标定和验证TBI和OSI算法是不适用的。用22和85GHz的散射指数SI和19GHz的极化指数PI,讨论了渤海区域海冰的主要辐射特征,用矢量辐射传输理论数值模拟了SI、PI与海冰覆盖及其厚度变化的定量关系,用SI-PI图规划了渤海区域性海冰的识别方法,给出了渤海海冰的空间分布及其辐射特征的时间序列变化。  相似文献   

11.
本文提出了一种基于 TMS32 0 C31串行接口的双通道实时数据采集处理系统的设计与实现方案 ,该设计以 TMS32 0 C31和 TL C32 0 AD5 0 C为核心器件 ,具有两个独立的 A/D,D/A通道 ,能够实现 32位浮点计算和 16位数据采集与回放。应用该系统进行归一化最小均方误差 (Normal-ized L east Mean Square,NLMS)算法实时自适应噪声抵消实验 ,实验结果表明 ,该系统能够实现实时的自适应噪声抵消 ,可广泛应用于实时语音信号处理等领域。  相似文献   

12.
以美国TI公司的第五代DSP器件TMS320C50组成的水下视频图像数字化系统,利用独特的软件采集方法灵活地实现3种不同点阵数的图像数据采集,系统同时采用“内存页扩展”的方式实现了可以达4Gb(bytes)容量的外部数据存贮的扩展,系统还设计了C50芯片与高速A/D及存取时间为70ns的静态RAM两种一同速度外设的接口电路,该系统较好地实现了水下视频图像模拟信号在规定时间内的数字化以及相应的数据笮  相似文献   

13.
This paper documents a new method for describing channel-related sedimentary deposits based on formal language theory. Using this method an analogue model of a sedimentary deposit can be encoded as a grammar. A program, called a parser, has been developed which can generate stochastic maps of these sedimentary deposits based on information in a specified grammar. The maps of sedimentary deposits generated by the parser have the same type, spatial arrangement, shape and size distribution as the analogue model. The successful generation of depositional maps represents a crucial step in the ongoing development of a new technique designed to generate 3D static geological models of sedimentary successions. The maps can be conditioned to match sparse hard data in the form of channel segments interpreted from seismic horizon maps.  相似文献   

14.
15.
非接触式六自由度运动测量与分析方法   总被引:8,自引:2,他引:6  
本文提供了一种非接触式六自由度运动测量与分析方法。首先应用位置测量仪(PSD)对安置在模型上的红外线发光源(LED)进行测量,然后用所编制的软件计算出模型的六个自由度运动情况。该方法避免了接触式测量仪对模型作用一定的力而产生的误差,同时具有较高的位置解析度与频率响应能力,测量结果精度较高。该方法可同时测量空间三个点的运动坐标从而可用计算机求得模型在空间的六个自由度运动情况。测量与分析结果令人满意。  相似文献   

16.
In 2009, the Gulf of Mexico (GOM) Gas Hydrates Joint-Industry-Project (JIP) Leg II drilling program confirmed that gas hydrate occurs at high saturations within reservoir-quality sands in the GOM. A comprehensive logging-while-drilling dataset was collected from seven wells at three sites, including two wells at the Walker Ridge 313 site. By constraining the saturations and thicknesses of hydrate-bearing sands using logging-while-drilling data, two-dimensional (2D), cylindrical, r-z and three-dimensional (3D) reservoir models were simulated. The gas hydrate occurrences inferred from seismic analysis are used to delineate the areal extent of the 3D reservoir models. Numerical simulations of gas production from the Walker Ridge reservoirs were conducted using the depressurization method at a constant bottomhole pressure. Results of these simulations indicate that these hydrate deposits are readily produced, owing to high intrinsic reservoir-quality and their proximity to the base of hydrate stability. The elevated in situ reservoir temperatures contribute to high (5–40 MMscf/day) predicted production rates. The production rates obtained from the 2D and 3D models are in close agreement. To evaluate the effect of spatial dimensions, the 2D reservoir domains were simulated at two outer radii. The results showed increased potential for formation of secondary hydrate and appearance of lag time for production rates as reservoir size increases. Similar phenomena were observed in the 3D reservoir models. The results also suggest that interbedded gas hydrate accumulations might be preferable targets for gas production in comparison with massive deposits. Hydrate in such accumulations can be readily dissociated due to heat supply from surrounding hydrate-free zones. Special cases were considered to evaluate the effect of overburden and underburden permeability on production. The obtained data show that production can be significantly degraded in comparison with a case using impermeable boundaries. The main reason for the reduced productivity is water influx from the surrounding strata; a secondary cause is gas escape into the overburden. The results dictate that in order to reliably estimate production potential, permeability of the surroundings has to be included in a model.  相似文献   

17.
Several ray-type 1D and 2D KdV equations for two-layer stratified ocean with topographic effect are derived in detail in the present study.A simplified version of these equations,ray type 1D KdV equation,is used to calculate numerically the disintegration of initial interface soliton from the deep sea to the continental shelf.At the same time,a laboratory experiment is carried out in a 2D stratified flow and internal wave tank to examine the numerical results.A comparison of the numerical results with the experimental results shows that they are in good agreement.The numerical results also show that the ray-type KdV equation has high accuracy in describing the evolution of initial interface waves in shelf/slope regions.Form these results,it can be concluded that the fission process is a dominant generating mechanism of interface soliton packets on the continental shelf.  相似文献   

18.
西太平洋晚第三纪钙质超微化石及其古海洋学意义   总被引:2,自引:0,他引:2  
本文研究了菲律宾海东部,北部“大洋钻探工程”125航次782A和786A二个钻孔晚第三纪的钙质超微化石。本区自下而上划分为13个带(或亚带),存在三个沉积间断:晚渐新世与中中新世之间;中中新世与晚中新世之间以及晚中新世与早上新世之间。据超微化石分析,本区晚第三纪存在4个相对暖水期和4个相对较凉期。根据菲律宾海东部,中部“深海钻探工程”58、59、60三个航次以及我国东海陆架、台湾东海岸及西部地区,南海北缘等地钙质超微化石分带的对比,晚渐新世与早中新世之间以及中、上新世之间的沉积间断在环西太平洋一侧具有普遍性,但形成原因不尽相同。  相似文献   

19.
连云港港区60个表层沉积样品的定量分析表明,与港区水动力、底形等沉积环境条件相适应,该区有孔虫埋葬群可分为口门、湾中、湾顶三大群个组合,并可进一步区分出若干六个亚类组合:(A)湾项浅水区——丰度值最低,胶结壳有孔虫含量最高,活体含量高;(B)鸽岛沉积区——与A紧邻,但以丰度值高相区别;(C)西岸码头深水区——水深,丰度高,活体少,浮游个体多;(D)东侧浅水区——水浅,埋葬群特征与C相近;(E)涨潮三角洲区--沉积物粒径小,丰度高,胶结壳含量最低;(F)口门高能区——以沉积物粒径较低区别于E区.  相似文献   

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