变量
- 与 变量 相关的网络例句 [注:此内容来源于网络,仅供参考]
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It researches the ship hateral movement multivariant stochastic control law on the basis of multivariant stochastic optimum control theory.
摘要本文基于多变量随机最优控制理论研究船舶横向运动多变量随机控制规律。
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Density Functional Theory method was used to optimize the geometries of 209 PCDE molecules, 209 PBDE molecules and 75 PCDD molecules at the B3LYP/6-31G* level. Using computed structural parameters as theoretical descriptors, the forward stepwise multiple regression technique was adopted to obtain QSPR models of environmental partition properties for these POPs by using GQSARF 2.0 and SPSS12.0 for windows programs. The obtained QSPR models are as follows:(1) QSPR models for predicting subcooled liquid vapor pressure, n-octanol/water partition coefficients lgK_(ow and subcooled liquid water solubilities -lgS_(w,l of PCDEs, of which correlative coefficients (R~2) are 0.988, 0.958 and 0.959 and the root-mean-square-error of estimation are 0.134, 0.116 and 0.327 respectively.(2) QSPR models of lgPL and n-octanol/air partition coefficients lgK_(oa for PBDEs, which both contain three structural parameters. The values of R2 for the two models are both 0.997 while the values of RMSEE are 0.073 and 0.062 respectively.(3) QSPR models of lgKow and–lgS_ for PCDEs, which both have one variable (mean molecular polarizability,α). The values of R~2 for the two models are 0.978 and 0.866 and the values of RMSEE are 0.300 and 0.270 respectively.(4) The molecular structures of 24 substituted naphthaline compounds were optimized using Hartree-Fock and DFT methods at four different levels and the same means was used to obtain four three-parameter (EHOMO, q~+ andα) QSPR models of lgK_. The model at the HF/6-311G** level is the best one of which R2 is 0.9662 and RMSEE is 0.380.(5) QSPR study for environmental partition properties of PCDEs was also performed using position of Cl substitution method in which simple parameters of substitution position were taken as descriptors. The multiple linear regression was performed with GQSARF 2.0 and SSPS 12.0 for windows programs to obtain QSPR models of lgP_L, lgK_ and–lgS_ for PCDEs of which R~2 are 0.991, 0.983 and 0.965 and RMSEE are 0.311, 0.100 and 0.300 respectively.
采用密度泛函理论方法在B3LYP/6-31G*水平上对PCDEs、PBDEs和PCDDs的分子结构进行了全优化计算,以计算得到的量子化学参数作为理论描述符,采用GQSARF 2.0和SPSS 12.0 for windows统计程序进行正向逐步回归分析,建立了这些POPs的环境分配性质的QSPR模型:(1) PCDEs的过冷液体蒸汽压、正辛醇/水分配系数lgK_(ow和水溶解度-lgS_(w,l的QSPR模型,这3个QSPR模型的相关系数(R2)分别为0.988、0.958和0.959,估计的均方根误差分别为0.134、0.116和0.327;(2) PBDEs的lgPL和正辛醇/空气分配系数lgK_(oa的QSPR模型,这两个模型都包含三个分子结构参数,其R~2都为0.997,RSMEE分别为0.073和0.062;(3) PCDDs类化合物的lgK_和-lgS_w的QSPR模型,两个模型都只含一个变量,其R~2分别为0.978和0.866,RSMEE分别为0.300和0.270;(4)采用Hartree-Fock和DFT方法,在4种不同水平上优化计算了24个取代萘系列化合物的分子结构,采用上述同样的方法分别建立了四种水平上的三变量lgK_模型,通过比较得到,在HF/6-311G**水平计算得到的模型最好,R为0.966,RSMEE为0.380;(5)同时,采用氯原子取代位置方法对PCDEs的环境分配性质进行QSPR研究,建立了PCDEs的lgPL、lgK_和-lgS_的QSPR模型,其R~2分别为0.991、0.983和0.965,RSMEE分别为0.110、0.100和0.300。
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Although it is possible to have variables and values whose compile-time types are abstract, such variables and values will necessarily either be null or contain references to instances of nonabstract classes derived from the abstract types
尽管可以变量和值在编译时的类型是抽象的,但这些变量和值必须要么为null,要么存储继承自抽象类型的非抽象类的实例的引用。
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For firms' adoption behavior, this thesis firstly explains why firms' adoption is in order from the static state by analyzing the regular pattern of firms' adoption behavior; builds control model of firms' adoption decision behavior, and describes the relationship between the stable values of response probability of firms' adoption decision; secondly raises the conception of firms' states from the dynamic state and defines two state variables to explain why and how a firm changes from nonadoption to adoption through the dynamic analysis of the factors influencing the two state variables. Thirdly, constructs the functions of adopting and choosing behavior with mathematical method, which is verified in following.
对于企业采用行为,首先从静态角度剖析了企业采用行为的一般机理用以说明为什么各企业在采用技术创新上有先有后,并建立了企业采用决策行为模型,定量刻画企业采用决策响应概率与动力结构的关系;其次从动态角度提出了企业状态演变概念并定义了两个状态变量,通过对两个状态变量的影响因素分析和动态分析,用以说明某一企业为什么和如何实现由未采用者到采用者的转变;第三对企业采用行为进行定量形式化构造了采用效果函数及选择概率函数等,并得到了调查结果的支持。
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In this thesis, several problems of time-dependent systems in various branches of physics are investigated by making use of the generalized invariant theory and the invariant-related unitary transformation formulation. The problems are given as follows:(1) Spin model and geometric phase factor in the fiber We investigate the fiber experiment performed by Chiao-Tomita and the Chiao-Wu theory concerning the geometric phase factor in the optical fiber, and then show that the investigation of the propagation of photons inside the noncoplanar optical fiber can be regarded as that of a second-quantization spin model.
本论文用推广的不变量理论和与不变量有关的幺正变换方法研究了一些物理分支中的几个含时系统问题:(1)自旋模型与光纤中光子几何相因子问题重新考察了Chiao-Tomita光纤实验和Chiao-Wu关于光纤中光子几何相因子的理论,证明了在非共面弯曲光纤中传播的光子运动问题实际上可以化为二次量子化含时自旋模型研究。
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D. Declaration of nonprimitive types such as String, Vector ans so on
有待确定,因为只有原始类型的实例变量和类变量的声明在类对象被创建/类被加载时完
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Through adding new state variable and using supplement functions,the problem with restriction conditions was converted into nonrestriction problem.
通过增加新的状态变量和用补偿函数法,将本课题的有约束条件问题化为无约束条件问题,并提出了最优步长参数的动态搜索法来修改传统的梯度法,从而较完善地解决了多变量最优周期控制的计算问题。
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Through adding new state variable and using supplement functions,the problem with restriction conditions was converted into nonrestriction problem.In addition,the dynamic searching method of optimal step coefficient was developed to modify the conventional gradient method,consequently the calculation problem of the multivariable optimal periodic control was able to be resolved better.
通过增加新的状态变量和用补偿函数法,将本课题的有约束条件问题化为无约束条件问题,并提出了最优步长参数的动态搜索法来修改传统的梯度法,从而较完善地解决了多变量最优周期控制的计算问题。
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Study three, on the basis of study one, the study chooses the shame measure resulting mark highest and lowest value 27% student make up the proneness shame group and none proneness shame group. We use the individual character tendentiousness scale CPAI and self-respect scale to measure the personality trait of students, which in order to explore personality variable difference on shame nyctinasty intensity and personality variable influence on the forming and development of shame during the native culture in China.
研究三,在研究一的基础上,抽取羞耻感测量所得分数最高分和最低分各27%的学生组成易羞耻组和不易羞耻组被试,运用个性倾向性量表CPAI和自尊量表进行测验,探索羞耻感受性程度不同的被试在人格变量上的差异及在中国文化下人格变量对羞耻感形成与发展的影响。
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The Complex Expression variant, on the other hand, requires more involved Thus, parsing and processing because of its flexibility and the optionality of its elements.
另一方面,因为复杂表达式变量的灵活性以及要素的选择性,它需要更相关的解析与处理。因而在复杂表达式变量为用户提供了更多功能性的同时,对服务器来说处理任务更加繁重。
- 推荐网络例句
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By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.
到它被攻陷的时候,里面多数的犯人是写了反对政府贪污文章的作家。
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The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.
在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色,卵在发育96h后卵基本全部孵化。
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There was a conflict between plebs and patricians in ancient Rome in 494BC.
在公元前494年,罗马发生了一次平民反对贵族的斗争。