Influence of incident beam divergence on the intensity of diffuse streaks

The influence of incident beam divergence on the length of the streak intercepted by the Ewald sphere is considered, as a relpHK·L of a faulted hexagonal crystal, mounted about itsc-axis on the goniometer head attached to the ø-circle, is brought into diffracting condition for the bisecting setting of a 4-circle diffractometer. For the special crystal mounting correction factors required to convert the measured intensities corresponding to a fixed length of the streak are derived. A procedure for experimentally verifying the mathematical approach employed in these derivations is also presented.     

Technology Convergence and Divergence in China's Electronic Industries: Evidence from Patents

By thoroughly reviewing international studies on technology convergence and divergence, four kinds of hypothesis are proposed based on patent data Herfindhal Index (HI) measurement. The main finding is that technology convergence does exist, based on patent technology records in China, primarily driven by overseas companies' strategic behavior, such as field intensiveness, competition during technology maturity session, and patent technology growth.     

Efficient Low Dissipative High Order Schemes for Multiscale MHD Flows, II: Minimization of ∇·B Numerical Error

An adaptive numerical dissipation control in a class of high order filter methods for compressible MHD equations is systematically discussed. The filter schemes consist of a divergence-free preserving high order spatial base scheme with a filter approach which can be divergence-free preserving depending on the type of filter operator being used, the method of applying the filter step, and the type of flow problem to be considered. Some of these filter variants provide a natural and efficient way for the minimization of the divergence of the magnetic field (∇·B) numerical error in the sense that commonly used divergence cleaning is not required. Numerical experiments presented emphasize the performance of the ∇·B numerical error. Many levels of grid refinement and detailed comparison of the filter methods with several commonly used compressible MHD shock-capturing schemes will be illustratedA condensed version appears in the Proceedings of the International Conference on High Performance Scientific Computing, March 10-14, 2003, Hanoi, Vietnam. This is a revised version of a longer internal report, Feb. 19, 2004. The longer internal report was published as a RIACS Technical Report TR03.10, July 2003, NASA Ames Research Center     

Linguistic Knowledge, Processing Speed, and Metacognitive Knowledge in First- and Second-Language Reading Comprehension: A Componential Analysis.

The authors report results of a study into the role of components of first-language (L1; Dutch) and second-language (L2; English) reading comprehension. Differences in the contributions of components of L1 and L2 reading comprehension are analyzed, in particular processing speed in L1 and L2. Findings indicate that regression weights of the L1 and L2 components are different. Although correlations between most processing speed components and reading comprehension are substantial, there are no unique contributions to the explanation of either L1 or L2 reading comprehension when linguistic and metacognitive knowledge are accounted for. In addition, L1 reading comprehension is shown to have a large contribution to L2 reading comprehension, supporting theories of L1-L2 transfer of reading skills. Results are discussed from a developmental perspective. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

凹凸激光谐振腔参数的热设计

讨论了凹凸稳定腔激光输出束散角与激光腔各参数的关系,得出了一系列激光棒热光焦度变化和束散角变化数据,并分析了这些数据。     

半导体激光器远场发散角的近似计算

从半导体激光器的单模工作条件出发,提出一个远场发散角的近似公式。比较用此近似公式计算结果与数值计算、二阶矩近似计算的结果发现,在半导体实际应用中的波导层范围,该公式能减少计算难度,同时能够满足精度要求。     

Temporal overlap in the linguistic processing of successive words in reading: Reply to Pollatsek, Reichle, and Rayner (2006a).

A. Pollatsek, E. D. Reichle, and K. Rayner (see record 2006-22004-014) argue that the critical findings in A. W. Inhoff, B. M. Eiter, and R. Radach (see record 2005-13471-012) are in general agreement with core assumptions of sequential attention shift models if additional assumptions and facts are considered. The current authors critically discuss the hypothesized time line of processing and indicate that the success of Pollatsek et al.'s simulation is predicated on a gross underestimation of the pretarget word's viewing duration in Inhoff et al. and that the actual data are difficult to reconcile with the strictly serial attention shift assumption. The authors also discuss attention shifting and saccade programming assumptions in the E-Z Reader model and conclude that these are not in harmony with research in related domains of study. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

中国南方新元古代—早古生代构造演化与盆地原型分析

中元古代末发生的晋宁运动在中国南方扬子陆块的周缘形成碰撞造山带,使华夏、川滇藏等陆块与扬子陆块拼合成统一的华南古大陆,奠定了新元古代—早古生代盆地发育的基底.新元古代—早古生代,中国南方在陆块裂解—离散—聚合不同的构造运动体制下,分别在扬子陆块的边缘和内部形成了不同的盆地原型及其演化序列.在扬子陆块的南、北缘,主要形成了裂陷—被动大陆边缘坳陷—前陆盆地的原型演化序列;在扬子陆内,由陆块离散拉张背景下整体下沉形成的碳酸盐岩台地演化为陆块聚合挤压背景下形成的台内坳陷盆地.而且,经加里东运动后,中国南方大陆得到了新的增生和统一,基本构造格局已经形成.      

哈贝马斯的当代生活世界病理分析与治疗

正确对待哈贝马斯的当代生活世界殖民化,关键在于把当代生活世界病理分析与治疗二者区分开来。哈贝马斯为当代生活世界殖民化把脉的病理分析具有一定的合理性。而其不足之处在于他把语言交往看作是治疗当代生活世界殖民化的妙药良方。语言交往对于治疗引起当代社会生活世界殖民化病因,即金钱和权力干预有一定的意义,但是,在我国,加强社会主义物质文明和政治文明建设,才是防止金钱和权力引起生活世界殖民化的根本途径。     

Default Bayesian Priors for Regression Models with First-Order Autoregressive Residuals

Abstract. The objective of this paper is to develop default priors when the parameter of interest is the autocorrelation coefficient in normal regression models with first-order autoregressive residuals. Jeffreys' prior as well as reference priors are found. These priors are compared in the light of how accurately the coverage probabilities of Bayesian credible intervals match the corresponding frequentist coverage probabilities. It is found that the reference priors have a definite edge over Jeffreys' prior in this respect. Also, the credible intervals based on these reference priors seem superior to similar intervals based on certain divergence measures.