离子注入对Cr12MoV钢表面组织结构和力学性能的影响

研究了Ｃｒ１２ＭｏＶ钢离子注入层的显微组织特征及其对表面性能的影响。结果表明，离子注入使Ｃｒ１２ＭｏＶ钢的表面硬度和耐磨性能得到显著改善，且存在着一个最佳的注入剂量，约为３×１０＾１＾７Ｎ＾＋／ｃｍ＾２左右。离了注入在Ｃｒ１２ＭｏＶ钢表面层中形成了大量细小弥散的第二相粒子，并使α－Ｆｅ晶格发生严重畸变，从而引起材料表面强化。     

地球物理数据的综合参数法

分辨率及多解性问题是地球物理勘探中长期存在的难题。针对这些问题，文中提出地球物理数据的综合参数法及对策，为解决这些问题进行了有效探索。     

Oil production,oil prices,and macroeconomic adjustment under different wage assumptions

The paper is an extension to another paper recently published in this same journal by Harvie (1990a). In that paper he developed a simple model to try to identify the possible macroeconomic adjustment processes arising in an economy experiencing a temporary period of oil production, under alternative wage adjustment assumptions, namely nominal and real wage rigidity. Certain assumptions were made regarding the characteristics of actual oil production, the permanent revenues generated from that oil production, and the net exports/imports of oil. The role of the price of oil, and possible changes in that price, was essentially ignored, which was equivalent there to setting it to a value of zero. Hence Harvie (1990a) was effectively concerned with analysing the economic effects arising from the production of oil alone. Here we attempt to overcome this deficiency by incorporating the price of oil, as well as changes in that price, in conjunction with the production of oil, the objective being to identify the contribution which the price of oil, and changes in it, make to the adjustment process itself. As in Harvie (1990a), the emphasis in this paper is not given to a mathematical derivation and analysis of the model's dynamics of adjustment or its comparative statics. But rather to the derivation of simulation results from the model, for a specific assumed case, using a numerical algorithm program, conducive to the type of theoretical framework utilized here. The results presented suggest that although the adjustment profiles of the macroeconomic variables of interest, for either wage adjustment assumption, remain fundamentally the same, the magnitude of these adjustments is increased. Hence, to derive a more accurate picture of the dimensions of adjustment of these macroeconomic variables, it is essential to include the price of oil as well as changes in that price.     

采用激光光刀的叶片三维面形测量方法

提出一种采用激光光刀的叶片三维面形测量方法。介绍了方法原理、系统结构、信息获取与处理方案,并给出了对实际飞机发动机叶片的面形测量结果。     

对 TPS－9000 型高温测试仪的改进及热采监测技术

通过分析ＴＰＳ－９０００型高温测试仪特性及测试原理，指出该设备存在流量测量密封段设计不合理的一些问题，并对该仪器进行大胆改进，重新设计与研制了流量测量段。经过多次改进和室内及现场实验，终于改制成能适应辽河油区高温高压条件下稠油热采测试的仪器。通过不同类型井的测试，其结果令人满意。为稠油开发和油藏热物性分析提供了分析资料和数据，在分层注汽和提高稠油动用程度上具有重要作用。     

南阳方程的改进与发展

由于含泥质地层中的沁抽矿物成分在纵向上或横向上变化都比较大，即使地层水矿化度相同，在浅、中深及深层中，泥质对视电阻率的影响不同，甚至差异较大，本文给出改进的南阳方程，能较好地解决这一问题，所需参数不多，方法简便，适应性强，处理的结果可靠，在砂泥岩剖面中，在参数完全相同的情况下，与阿尔奇公式处理的结果相比较，南阳方程处理的结果更符合实际情况。     

RECONSTRUCTION OF ONE DIMENSIONAL MULTI-LAYERED MEDIA BY USING A TIME DOMAIN SIGNAL FLOW GRAPH TECHNIQUE

A novel inverse scattering method to reconstruct the permittivity profile of one-dimensional multi-layered media is proposed in this paper.Based on the equivalent network ofthe medium,a concept of time domain signal flow graph and its basic principles are introduced,from which the reflection coefficient of the medium in time domain can be shown to be a series ofDirac δ-functions(pulse responses).In terms of the pulse responses,we will reconstruct both thepermittivity and the thickness of each layer will accurately be reconstructed.Numerical examplesverify the applicability of this method     

Electron holographic observation for biological specimens: electron holography of bio-specimens

Electron holography has been applied to the observation of biological filaments. The technique has some advantages over conventional imaging for observing weak-phase objects such as small unstained biological structures. To avoid artificial structural transformation of the sample owing to the interaction with the supporting film, a holey carbon film was used to support the filaments. A tobacco mosaic virus bridged over a hole was observed as a cylindrical shape; the contrast distribution across the filament represents its actual shape, which is difficult to obtain with conventional transmission electron microscopy. A number of technical limitations which at present prevent high-resolution structure analysis of biological macromolecules by electron holography are discussed in this report.     

高3块蒸汽吞吐阶段储量动用程度研究及挖潜措施

为了解决高3块开发中储量动用程度差的状况，采用容积法、产量特征曲线法和数值模拟法选择合理井网．以提高平面储量动用程度；通过物理模拟法，确定改善油层纵向动用程度的开采方式。结果表明：蒸汽吞吐开采最优井距为105m；改善开发效果最佳注汽方式为全面注汽，注热水开采效果也较好，但需提高注入速率。     

Instron texture profile of buffalo milk cheddar cheese as influenced by composition and ripening changes

Buffalo milk Cheddar cheese samples of different ages were analysed for compositional attributes (CA), ripening indices (RI) and Instron Textural Profile (ITP). All samples were compositionally alike, except for pH and salt-in-moisture (SM) contents. RI showed significant variations. CA and RI showed highly significant correlations within themselves and with each other, except for moisture with pH, SM with moisture, MNFS, Fat and FDM and Fat with MNFS. The ITPs of cheeses showed significant variations and had highly significant intercorrelations indicating their interdependence. CA (except moisture and MNFS) and RI showed a highly significant correlationship with ITPs. Moisture content showed a highly significant correlationship with all ITPs, except cohesiveness and springiness, where it was significant. MNFS content showed significant correlations only with hardness and brittleness. Stepwise regression analysis revealed that MI was the most predominant factor influencing cheese texture, followed by pH, SM, FDM and TVFA. Knowing Ca and RI, the textural properties of cheeses can be forecast through mathematical equations. Similarly the age of cheese can also be predicted if RI and/or textural properties are known.