查询词典 correlation dependence

Neurobiological and pharmacological studies have revealed that there is a direct correlation between the mesocorticolimbic system and opioid dependence.

神经生物学和药理学的研究均表明，阿片类物质依赖与中脑皮层边缘系统直接相关。

This paper introduces the background of the Copula method and its definition and properties firstly. And then the rank correlation and the tail dependence are introduced as well as their relationships with the Copula methods.

本文首先介绍了Copula理论的相关背景、定义及主要性质，然后介绍了秩相关测度和尾部相关性的度量，及其与Copula模型的关系，说明了Copula模型可以描述各种非线形的相关结构。

ABSTRACT : We first analyze the implication of market efficiency and compare it with dependence, correlation deeply. Using robust statistic method, we test the efficiency of some representative real estate markets in china, analyze their efficient depth, and explore the inner principle.

本文在深入分析市场有效的含义并与独立性、相关性进行对比的基础上，采用比较稳健的统计方法对中国有代表性的房地产市场的有效性进行检验，同时分析了房地产市场的有效性程度，并对其内在机理进行探讨。

A prediction model has been proposed to deal with threshold voltage shift as a function of 1MeV neutron flux and gate oxide thickness, and to deal with room-temperature annealing of threshold voltage shift induced-by 〓Coγ as a function of electric field and gate oxide thickness. The commonness and individuality of MOS device degradation between hot-carrier effect and ionizing radiation were investigated. The dependence of substrate current, gate current and threshold voltage shift due to hot-carrier on gate oxide thickness were simulated with MEDICI-2D simulator. The photocurrents of PN junction and bipolar transistor were studied. Their transient responses on varied bias voltages, pulse durations and absorbed doses were simulated. The influences of NPN base width on base and collector photocurrents were investigated. We also studied 1MeV neutron displacement damage in PN junction, and calculated reverse current leakage under the neutron flux of 2. 67×10〓 per square centimeter. 3 The study of nondestructive screening method for MOS radiation tolerance A theoretical and experimental study of nondestructive screening methods for radiation tolerance of nMOS and pMOS were firstly fulfilled. We determined the informative parameters pertinent to the method and proposed how to deal with experimental data and verify obtained results statistically, as well as make the required steps for nondestructive screening. Based on the experimental data of 180 samples of discrete pMOS devices, the relation between sample quantity and correlation coefficient, screening equation, and other significant results were obtained from the threshold voltage shifts of pre-and post-irradiation samples.

二、分立器件电离和位移辐射损伤响应研究在国内首次开展了电离辐射引起的氧化层阈值电压漂移和退火理论研究，编程计算了1MeV中子引起的MOS器件阈值电压漂移与中子通量及栅氧厚度的关系，计算了〓Coγ光子引起的阈值电压漂移及退火的时效曲线与纵向电场和栅氧厚度的关系等，对评估MOS型集成电路电离损伤和加固方法研究，以及论文中开展的MOSFETs无损筛选方法研究奠定了基础；分析了MOS器件热载流子损伤效应与辐射电离损伤效应之间的异同性，利用二维模拟软件MEDICI-2D模拟了衬底电流和栅电流，在不同栅氧厚度下随栅压的变化曲线，计算了热载流子效应造成的阈值电压漂移，研究结果对当前存在的以热载流子效应研究取代电离辐射损伤实验研究的设想，具有重要的参考价值；开展了PN结和双极晶体管电离光电流研究，计算了不同偏压、不同辐射脉宽和不同吸收剂量下PN结光电流的瞬时响应，计算了不同辐射脉宽下NPN晶体管基极电流和收集极电流的瞬时响应，以及基区宽度对NPN晶体管光电流的影响，研究结果对双极器件抗电离辐射损伤响应及加固方法研究具有重要意义；在国内首次开展了器件位移损伤的理论研究，分析了辐射产生的缺陷对电性能的影响，计算了注量为2.67×10〓cm〓的1MeV中子产生的缺陷对PN结反向电流的影响。

So serial correlation, heteroscedasticity, and state dependence problems may also exist in the panel data.

故三期经纬数据之间可能包含有序列相关、异质性、与状态相依的问题。

The results show that although the returns themselves contain little serial correlation, the variability of returns has significant long-term dependence.

结果表明：中国股市具有显著的非线性特征，虽然收益率序列的自相关性较弱，但波动性序列却表现出显著的长期记忆效应。

The source of Fe was provided strong supporting evidence. Iron isotopic ration of BIF has the positive dependence ofδEu, indicating the source of Fe correlation with hydrothermal fluid.9. A model for Fe cycling.

首次从成矿元素本身为BIF的物质来源提供直接证据：BIF的Fe同位素成分与Eu异常存在非常明显地正相关关系，这清楚地表明鞍本地区BIF中铁的来源与海底火山热液活动有关。9。

For the first time, we studied isospin effects on the two particle correlation functions, the light particle multiplicity and their ratio in HIC''s at intermediate energies, and find they are sensitive probes for the density dependence of the symmetry energy.

在国际上首次研究了重离子碰撞中两核子关联函数和轻粒子产生的多重性及比率的同位旋效应，发现它们敏感于核物质对称能的密度相关性。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。