DFMC在水利机械产品开发中的应用研究

分析了DFMC(大规模定制设计)关键技术及相关技术,提出了运用该项技术开发产品企业应作好的前期准备,研究了水利机械产品"大型移动启闭机"的定制开发。     

APPLICATION OF SITE-SPECIFIC NATURAL ISOTOPE FRACTIONATION (SNIF-NMR) OF HYDROGEN TO THE CHARACTERIZATION OF EUROPEAN BEERS

More than one hundred samples of European beers have been investigated by the new SNIF-NMR method which is based on 2H NMR at the natural abundance level and enables site-specific natural isotope fractionation factors in ethanol to be determined. The relative (R) and absolute (D/H)_i, parameters are shown to be characteristic of the country where the beers are brewed and the observed variations are explained in terms of cereal composition, water resource, and manufacturing processing (fermentation, yeast, temperature cycle). These new parameters find analytical and mechanistic applications in the identification of a beer and in the investigation of a fermentation process.     

从76届SEG年会看综合物化探技术的发展方向

文中在介绍76届SEG年会的展商、展台及会场专题报告与论文发布情况的基础上，阐述了参加本届SEG年会的体会，指出了重磁电技术发展的四个趋势：向海洋勘探技术方向发展、向复杂区综合勘探技术方向发展、向三维联合处理和三维可视化解释技术发展、向直接圈定和检测油气方向发展。     

新城金矿采场落矿控制爆破技术

新城金矿为蚀变岩型金矿床,由于受地质构造影响,顶板稳定性较差,局部和较大面积的顶板冒落现象时有发生,为了解决采场顶板安全问题和提高落矿主要技术经济指标而进行了“上向水平分层尾砂胶结充填法采场控制爆破技术”的试验研究工作,试验达到了预期效果。     

The use of the stable isotope 44Ca in studies of calcium incorporation into dentin

The incorporation into rat incisor dentin of two calcium isotopes, the stable ⁴⁴Ca and the radioactive ⁴⁵Ca, was studied using secondary ion mass spectrometry (SIMS) stepscanning and imaging, and autoradiography, respectively. The results demonstrated a time-dependent incorporation of the calcium isotopes into the mineral phase of dentin. With the SIMS step-scanning, detecting ⁴⁴Ca, the ion yield was high in the odontoblasts 2 min after intravenous injection. After 10 min a marked increase in signal intensity was found at the dentin mineralization front. This result was consistent with those obtained by ⁴⁵Ca autoradiography; a peak of incorporation occurred 10 min after injection of the isotope. Likewise, localization of ⁴⁴Ca to the mineralization front could be demonstrated 10 min after injection by SIMS imaging. In images obtained at earlier intervals, no such increase in ion yield could be detected. The results show that the nonradioactive, stable isotope ⁴⁴Ca can be used as a marker for biomineralization in a similar way to radioactive ⁴⁵Ca.     

Development and implementation of a NURBS curve motion interpolator

This paper deals with the issues of development and implementation of a real-time NURBS interpolator for a six-axis robot. Using an open-architecture controller system as a testbed, a real-time NURBS curve interpolator was developed, implemented and tested. Sample runs were conducted with the resulting trajectories measured in real-time during robot motion. The resulting trajectories are analyzed, discussed and compared with those from a commonly used point-to-point approximation technique. The real-time NURBS curve interpolator's feasibility, advantages and related issues are also discussed.     

国外柴油机用粉末冶金气门阀座概述

概述了国外粉末冶金气门阀座的制造工艺特点,简要介绍了国外柴油机用粉末冶金气门阀座材料的性能水平。     

陕北姬塬油区储集层特征地球物理测井分析

为了保持油井稳产，提高油藏采收率，姬塬油区拟采用面积法注水，急需对油藏分布规律进行详实、系统的研究，以保证井网建设的合理、高效。在前人研究成果基础上，对油区现有测井资料进行收集、整理、再解释，从油藏特征研究出发，对储集层进行测井分析，并使用克里金技术进行了地质建模。使用容积法计算油藏储量，为油区的注水开发提供了油藏资料。     

"米邦塔"仙人掌面包、蛋糕的研制

对仙人掌蛋糕、面包制作的可行性进行了研究。分别采用海绵蛋糕制作方法和一次发酵法制作仙人掌蛋糕和面包，并对它们的感官质量进行了评定。结果表明：仙人掌焙烤食品的感官质量符合相关国家标准，与普通焙烤食品相比，在外观形态、内部组织结构等方面无明显差异，且剖面呈绿色，略带仙人掌清香。仙人掌面包、蛋糕的开发，为仙人掌资源的开发利用提供了一条新的途径。     

Radiosity with Well Distributed Ray Sets

In this paper we present a new radiosity algorithm, based on the notion of a well distributed ray set (WDRS). A WDRS is a set of rays, connecting mutually visible points and patches, that forms an approximate representation of the radiosity operator and the radiosity distribution. We propose an algorithm that constructs an optimal WDRS for a given accuracy and mesh. The construction is based on discrete importance sampling as in previously proposed stochastic radiosity algorithms, and on quasi Monte Carlo sampling. Quasi Monte Carlo sampling leads to faster convergence rates and the fact that the sampling is deterministic makes it possible to represent the well distributed ray set very efficiently in computer memory. Like previously proposed stochastic radiosity algorithms, the new algorithm is well suited for computing the radiance distribution in very complex diffuse scenes, when it is not feasible to explicitly compute and store form factors as in classical radiosity algorithms. Experiments show that the new algorithm is often more efficient than previously proposed Monte Carlo radiosity algorithms by half an order of magnitude and more.