查询词典 delta function

Since there\'s inlayer heterogeneity in layered sandstone reservoirs and remaining oil potentials are mainly in thin or poor layers, which are mostly in delta front facies growth, this paper studies physical characteristics parameters interpretation methods for delta front deposit reservoirs to deepen the acknowledge to the depositional modes and features for further implementing the develop adjustment potentials and optimizing the potential tapping adjustment patterns. This practice has an important guiding sense to enhance the ultimate production recovery for mature oilfields.

我国大多数主力油田都属于陆相河流—三角洲沉积储层，如大庆的喇嘛甸、萨尔图和杏树岗等油田，这些油田基本上均已进入高含水后期开采阶段，尤其是以河流相发育为主的主力油层综合含水已达到90%以上，由于多油层砂岩油田存在层间的非均质性，油田的剩余油潜力主要集中在以三角洲前缘相发育为主的薄、差油层中，因此研究三角洲前缘相沉积储层的物性参数解释方法，深化其沉积模式及沉积特征的认识，进而落实油田开发调整潜力，优化调整挖潜方式，对提高老油田最终采收率具有重要的指导意义。

By the delta matrix inverse lemma, the delta operator recursive least squares algorithm is derived, and convergence about DRLS is also proved.

基于Delta算子矩阵求逆引理，导出Delta算子最小二乘估计的递推算法，证明了DRLS的收敛性。

Influenced by tectonic movement, there were no sediments in the area from Oligocene to Miocene. Appearance of marlite in the Pliocene, especially in Yaqueling region, proved localized depositing environment forming, for which there had only few amount of terrigenous matters to supply. Sedimentary facies association of alluvial fan, fan delta and inland lake appeared at the early and middle stage of lower Pleistocene, and association of fan delta and inland lake appeared at the later stage of lower Pleistocene and the early stage of middle Pleistocene. Net-veined laterite appeared at the top of lacustrine deposit, which reflected pedogenesis taking place after the end of deposition. Such evolution history proves that there had no lager river system traversing this area before the early stage of middle Pleistocene.

对于江汉盆地西缘宜昌地区来说，其沉积及古地理演化表现为：早白垩世为受天阳坪断裂控制的内陆湖泊沉积环境，沉积中心在天阳坪断裂的北侧，此时几乎不存在来自黄陵地区的水系；晚白垩世同样为受断裂控制的内陆湖盆环境，但湖盆面积扩大、断裂活动减弱，且后期出现成化湖相沉积；第三纪早期盆地由断陷盆地转变为坳陷盆地，同时石膏的出现代表了局限咸化湖盆的存在；渐新世—中新世，受构造影响，缺失该时期的沉积；上新世时在鸦鹊岭一带出现的泥灰岩沉积反映了陆源物质供应不足的局限沉积环境的存在；早更新世早中期为冲积扇—扇三角洲—内陆湖泊沉积，早更新世晚期—中更新世早期为扇三角洲—湖相沉积，后期出现沉积结束以后的网纹红土化作用。

Xiaochaka formation developed Fan delta facies, delta facies, and carbonate platform facies, which basically continued the paleography of early and middle Triassic, but with intensive progress in early stage and quickly regress in late stage, companied by depositional overlapping in early stage and weathering erosion in late stage respectively.

肖茶卡组主要发育扇三角洲相、三角洲相和碳酸盐岩台地相，基本继承早中三叠世古地理面貌，但早期出现广泛海侵和后期海水退出，形成早期的沉积超覆与后期遭受风化剥蚀。

Ber at doses of 1-4 mg·〓 iv was shown to decrease dose-dependently the spectrum power of delta dominant frequency in cortical area and transfer the dominant freqency from delta to theta rhythm in hippocampus. Under the same conditions, the effects of physostigmine 0.1mg·〓 iv on EEG were similar to Ber.

Ber 〓能浓度依赖性地使清醒兔皮层区EEG持续出现低振幅快波，其主频率功率明显减少，并使海马区EEG出现持续且有规律的θ节律，Ber 〓iv使功率谱中δ、θ、α+β相对功率由对照组的43.1±9.3、28.0±4.0和26.1±6.3分别变为28.3±4.7、48.6±5.8（P.01）和22.6±7.2，海马区主频率从δ段右移至θ段，主频率功率明显减少。

In forepart and middle of K1qn23 the lake shore line popple on main body of west slope.During the power source supply period, delta developed quickly and after source died down,lake bay became developing. In the late of K1qn23 the lake shore line popple on the east of westslope and source died down, small delta developed.

青二三段沉积早中期，湖岸线在西部斜坡主体波动，在物源供应较强时期，三角洲较为发育，在物源供应较弱时期湖湾相对发育；青二三段沉积晚期，湖岸线在西部斜坡东侧波动，物源供应相对较弱，沉积相以小面积的三角洲相为主。

By comparing the ternary and the binary encoded delta-modulation system we can find that the quantizing noise of ternary encoded delta-modulation system is lower and the lower power dissipation is its another virtue.

本文通过二值增量调制系统的分析，提出了三值增量调制系统的实现方法，并通过和二值系统的比较，得出量化噪声小，功耗低的优点。

The paper analyzes the main problems related to resource and env ir onment in the ar-eas of The Bohai Sea Rimland,Yangtze River Delta and Pearl R iver Delta through a com parative method.The regional differentiation character s that the water resource shortage is getting more se-rious from south to north ,the farm resource waste is getting worse from north to south and envi-ronment al pollution is increasing together with the development of regional economy i n the east-ern coastal areas in China are put fo...

采用比较研究方法，分析了环渤海地区、长江三角洲地区和珠江三角洲地区的主要资源环境问题，提出了我国东部沿海地区水资源短缺由南向北明显加剧、耕地浪费状况由北向南趋于恶化、环境污染程度与经济发展水平同步增长的区域分异特征，并对产业结构演进，特别是工业化过程中地区经济发展与资源环境的相互关系进行了探讨，归纳并修正了二者之间互动模式，提出了建立资源友好型的产业体系、加强资源环境管理规制等优化对策。

This invention concerns a current control process for a feed-in voltage converter, wherein a detected flux-inducing current component and a detected torque-inducing currrent component of an actual currrent vector of a rotating field machine are each controlled for a flux-inducing current component set value and a torque-inducing current component set value of the rotating field machine. To that effect, a control set-value (DELTA u*sp, DELTA u*sq) is determined, dependent each time upon a determined current component control deviation. From these, current components of an actual current vector are formed each time by overlay of a formed pilot value (u*spvor, u*sqvor). This invention also concerns a device for carrying out this process.

本发明涉及一种用于馈入电压式变流器的电流调节方法，其中分别将所检测的一感应式电机的一实际电流向量（i s 的磁通感应电流分量和一转矩感应电流分量i sq ）调节至该感应式电机的一额定电流向量的一磁通感应分量额定值和一转矩感应电流分量额定值，在这种情况下，分别根据所检测的一电流分量调节偏差计算出一调节器调节量（△u * sp ，△u * sq ），由这两个调节器调节量分别通过叠加所形成的一预控制量（u * spvor ，u * sqvor ）形成一额定电压向量的电压分量（u * sp ，u * sq ），本发明还涉及一种用于实施该方法的装置。

The deltas differ from typical deltaic model.Deltaic front subaqueous distributary channel sand bodies and deltaic plain distributary channel sand bodies are the skeleton sand bodies of meandering stream-shallow sea delta and braided streain-shallow lake delta respectively but not tranditional deltaic front river mouth sand bars.

这两类三角洲与经典的三角洲模式不同的是，三角洲前缘水下分流河道砂体和三角洲平原分流河道砂体分别构成了曲流河浅水海相三角洲和网状河浅水湖泊三角洲的骨架砂体，而不是传统认为的三角洲前缘河口砂坝。

Great. What repertoire did you see?

太棒了。你看的是什么剧目？

I prepared not to accept such ridiculousness:"Please," I said to him.

我可不想理会这套荒谬的东西："请你通情达理一点儿。"