In view of the predicting circumstance by experience in the past,formula of monthly natural decline rate is deduced in the regular pattern of exponential decline,double curves decline and harmonic decline.
针对以往凭经验预测的结果精确度不高的现状,推导出了指数递减、双曲递减和调和递减规律下的月度阶段自然递减率计算公式,在此基础上,基于大量的现场数据,提出了一套月度自然递减率经验公式预测方法。
Meanwhile,the author pides the oilfield production decline rate into the liquid production rate natural decline and t.
同时将油田产量自然递减率分解成产液量自然递减率和含水上升因子2个主要部分,分析了产液量和含水对产量自然递减率影响所占的比例,并预测了开发指标。
A differential equation for production decline rate is set up based on the study of variation of production decline curve,by which the dimensionless decline equation for describing the production decline rule is deduced.
根据产量递减曲线变化特征,建立了产量递减率微分方程,并由此得到了描述产量递减规律的无因次递减方程。
In order to increase prediction accuracy of development blocks with short production history,this paper introduces multiple regression method through three following aspects: prediction of decline index and initial decline rate;prediction of annual decline rate;prediction of injection-production ratio.
为了提高生产历史较短开发区块的预测精度,从3个方面研究介绍了该方法的应用情况:一是预测递减指数和初始递减率;二是预测年对年自然递减率;三是预测油田注采比。
Based on the completely research of electroslag remelting process in 10 ton large ESR furnace,the advanced technologies taking descending power model as the core were developed,including ingot crystallization quality control,slag crust thickness control and hydrogen pick-up prevention.
通过对电渣重熔工艺的系统研究,在国产10 t大型电渣重熔炉上开发了以递减功率模型为核心的钢锭结晶质量控制、渣皮厚度控制和防止增氢等先进工艺技术。
dry adiabatic lapse rate
干绝热〔温度〕递减率；干绝热〔温度〕直减率
ADIABATIC TEMPERATURE LAPSE RATE IN CLOUD AND ITS RELATIONSHIP WITH MICROSTRUCTURE
云中绝热温度递减率同微结构的关系
Analysis of influence factors of super heavy oil production decline in block Du84
杜84断块超稠油产量递减率影响因素分析
Temperature decreases with elevation through the troposphere at a rate, normally, of about0.6℃ for100 m.
在对流层，气温随高度减小，其递减率通常为每上升100米下降0.6℃右。
There is a range of applied force over which the regression rate remains constant.
施加的力有一个范围，在这个范围内递减率保持不变。
FDB method [fixed rate on declining balance method]
定率递减余额折旧法［
depreciation method of fixed percentage of diminishing value
递减价值定率折旧法
Solar irradiance decreases towards the poles.
太阳辐照率向两极递减。
a reduction in quantity or rate.
在数量或比率的递减行为。
wellbore storage depletion rate
井筒积聚流体的递减速率
Research on Decreasing Probability Flooding Algorithm in P2P Network;
P2P网络的概率递减洪泛算法研究
Improved Crowds system based on decreased forwarding probability
转发概率递减的改进Crowds系统
is the rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double- declining balance method)
指余额递减速率，若省略，则采用默认值2（双倍余额递减）．
The entrainment rate should closely decrease exponentially with freeboard height.
夹带率应几乎随自由空域高度成指数递减。
The Definition of Value Scope of Net Salvage in Terms of Double Declining Balance Method;
双倍余额递减法下净残值率取值范围的界定
Under the declining-balance method, an accelerated depreciation rate is computed as a specified percentage of the straight-line depreciation rate.
使用双倍余额递减法时,加速折旧率计算为直线折旧率的一定比例。
3.1.4 Auto increment and decrement
3.1.4 自动递增和递减
declining Balance method; reducing charge method: In depreciation where the annual charge for depreciation is the amount obtained by applying a diminishing rate to the original cost of the asset.
余额递减法;递减计提法:即在折旧时采取对资产的原始成本使用一个递减比率的方法计算年折旧额