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Considered the inside and outside contour line was Archimedes spiral in the cold rolling, the forming law of rectangular cross sectional rings has been studied. And the more precise geometrical models and calculation models have been gained. The researches can be used as a theoretical and experimental foundation for the simulation of ring rolling process. At the same time, the results of theoretical analysis have a good agreement with the results of practical rolling production.

本文在考虑冷轧过程中环件的内外轮廓线均为阿基米德螺线的情况下，对矩形截面环件的轧制成形规律进行了研究，得到了较精确的几何模型和计算模型，为环件轧制过程的模拟提供了理论依据和实验依据，同时理论分析的结果与实际轧制生产过程中的结果有较好的吻合。

One option BMW is looking at to boost demand is to increase the number of variants currently on offer. At present there are the V8 powered 740i and 750i models as well as the six-cylinder 730d turbodiesel, but Arndt hinted that more six-cylinder petrol models could eventually be offered as well as next year's hybrid model based on the recently revealed ActiveHybrid Concept.

为了提高市场需求，其中的一个选择是增加更多车型，宝马目前上市的7系车包括搭载V8引擎的740i和750i以及搭载六缸涡轮柴油引擎的730d柴油车，不过Arndt表示宝马会提供更多六缸汽油车型，另外明年将推出基于最近发布的ActiveHybrid概念车的混合动力车型。

Methods Three mandibular impact fracture models were prepared using intact human mandibular specimens and simulated maxillary models according to the Hanau principle of articulator and a MTS-858 biological material testing machine.

目的 利用MTS-858生物材料试验机进行下颌骨撞击试验和三维有限元分析方法揭示下颌骨骨折生物力学机制。

Artillerymen need to understand that databases used to drive force-on-force models are not always accurate. Many of the models have not been updated, and their databases do not reflect all aspects of lethality.

陆军野战炮兵清楚地认识到，即之前用来做演练的对抗型模型的数据库是未必准确无误的，许多模型数据甚至多年都没有经过升级，数据库不可能完全真实的反映炮火的全部杀伤力。

The present elastic-plastic model considers the summits of asperities with different radius and interaction between neighboring asperities when there is enough deformation for an asperity, so it is more practical than previous models, and is also a guide for further research of tribology models related to fractal characteristics.

建立的模型考虑各个微凸体具有不同的峰顶曲率半径，当变形足够大时考虑微凸体间的相互作用，因而较前人建立的模型更符合工程实际，同时也对与分形特征相关的摩擦学模型的进一步研究具有一定的指导作用。

The 4 new models have been optimized to be easy to build with ranging complexity, going from the Quick Start model that you can assemble and program in under 30 minutes, to the ultimate Humanoid – which is also easy to assemble and all models are designed for easy battery change.

4个新车型都得到了优化，以易于建立与各种复杂性，从快速启动模式，您可以组装和程序在30分钟，最终人-这也是很容易组装和所有型号的设计容易电池变化。

New sub-models for the four-way valve and the boost pump have been created by combined models. The initial parameters for the calculating analysis were determined at a rough estimate. The model has also been tested, modified and improved.

所构建的双燃料喷油器的计算模型能够较好的模拟复杂的双燃料结构特点和工作过程；采用模块组合的方法构造了四通阀和增压泵等新组件；采用估算的方法，确定了计算分析的初步参数；并对双燃料喷油器的计算模型进行了验证、调试和改进。

The common method, that all strong-correlation terms of the model are eliminated, can bring the loss in the engineering application, so the new method is proposed that the identified model reserves some correlation. The augmented matrix A is constructed by the outputΔW and the matrix S. The"determinating order based on ratio of determinant"is brought out to screen the strong-correlation terms in the structure identification. The latent root estimation is improved in screening the eigenvalues and eigenvectors. Thus the estimation precision is improved greatly.The consistence check of guidance instrument error coefficients of flight test and ground test is the purpose of flight experiment. The causes of inconsistency of the two models are analyzed. The hypothesis test of linear regression model based on F statistics is proposed to check the consistence.Finally, the instability of error coefficients is probably caused by the change of the flight environments, therefore, the relation between the error coefficients and flight environment is analyzed. The approach is presented to identify SINS guidance instrument error models and compensate the error in the segmented sections corresponding to the change of vertical acceleration of aircraft.

在结构辨识中，常用的方法由于将模型中的强相关项全部剔除而给工程应用带来损失，因此，本文提出了新的有益思想，即在保留一定相关性的基础上进行辨识：将输出向量ΔW与环境函数矩阵S构成增广矩阵A，然后采用"比定阶行列式"来剔除相关向量的方法，这样既可以尽可能多地保留了对落点影响大的强相关参数，又可以对落点影响小的强相关参数给予剔除；在参数估计中，改进了特征根估计中特征根和特征向量的筛选方法，提出"近零"准则，从而大大提高了参数估计的精度；再者，鉴于天地模型"一致性"检验是飞行试验和SINS制导工具误差系数分离的主要目的，因此，本文又深入分析了造成天地模型不一致的原因，提出了采用基于F统计的线性回归模型假设检验方法来进行捷联制导工具误差模型的天地"一致性"检验；最后，鉴于飞行环境剧烈变化可能会对惯性仪表误差系数稳定性带来一定的影响，因此本文深入地分析了SINS制导工具误差系数与外界环境的关系，提出了基于过载变化大小的分段辨识和分段实时补偿的算法。

Stationary and nonstationary processes, including ARIMA processes. Estimation of process mean and autocovariance function. Fitting ARIMA models to data. Statistical tests for white noise. Forecasting. State space models and the Kalman filter. Robust time series analysis. Regression analysis with correlated errors. Statistical properties of long memory processes.

静态和非静态过程(包括 ARIMA 过程)，均值和时间序列分析：自协方差估计，用 ARIMA 模型拟和数据，白噪声序列的统计检验，预报，状态空间模型和 Kalman 过滤，时间序列分析的稳健性，残差具有相关性的回归分析。

According to the business processing of one axletree manufacturing enterprise,design the development models of its production management system.Based on these models,relative software company developes practical system for the manufacturing enterprise,and it runs well in the manufacturing enterprise.

基于UML这种面向对象建模语言和技术，结合某加工制造企业生产管理的业务流程，建立了生产管理信息系统的开发模型，在模型建立的基础上，相关软件企业开发了实用的信息系统，并且在该加工制造企业投入实施，取得了满意的效果。

Some of them were ligated to the plasmid vector pCR 2.1 andsequenced,respectively.

将所获DNA片段克隆到pCR2.1载体进行测序，并与基因组数据库进行同源性比较。

Thinking since Google owns Blogger, I would be able to escalate this issue to the support team.

自谷歌的思考拥有Blogger的，我将能够缓解这一问题的支持团队。