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��It is an important study subject concerning the filtration mechanics over the years to converselly determine the parameter texture (e.g. parameter recognition )in the inner system through observing the gas well pressure, production rate and water-gas ratio, in accordance with the working regulations for this gas field. By use of this method, some good results have been obtained in automatically matching the production history for eight years in the Jia-3 gas reservoir of Dengjingguan gas field.     

等离子体氧化nc-Si/SiO_2多层膜的蓝光发射

报道了在等离子体增强化学气相沉积 (PECVD)系统中用交替淀积 a-Si对其进行原位等离子体氧化的方法制备了 a-Si∶H/ Si O2 多层膜。随着 a-Si∶H子层的厚度从 3 .8nm减小到 1 .5 nm,a-Si∶H/ Si O2 多层膜的光吸收边和光致发光 (PL )出现了蓝移。在晶化的 a-Si∶ H/ Si O2 多层膜中不仅观察到室温下的红光带 (80 0nm)的发光峰 ,而且还观察到蓝光发射 (4 2 5 nm) ,结合 Raman,TEM和 PL测试 ,对其原因作了简单的分析     

622Mbps ATM网络线路加密机设计构想

介绍了一种可以加密ATM网络的声音、数据、图像信息,其上限速率为622Mbps的ATM网络线路加密机设计构想,设计构想考虑了密钥管理功能的实现。     

低压宽温高频铝电解电容器工作电解液

在传统的己二酸铵/乙二醇加水体系中,通过增加水的含量实现高电导率,同时在电解液中添加多种有机高分子物质形成复合添加剂,改善工作电解液的高温稳定性,使电容器上限工作温度扩展到105℃,形成高频宽温低阻抗工作电解液。     

倾斜水塔的爆破拆除

针对某部倾斜水塔的定向爆破拆除,从防止水塔倾倒偏移和筒体触地冲击地面对周围环境造成影响等不利情况,确定爆破方案和采取相应的防护措施.     

Effects of size and orientation change on hippocampal activation during episodic recognition: a PET study

To determine whether physical match between studied and tested items influences blood flow increases in the hippocampal formation associated with recognition memory, positron emission tomography (PET) was used to measure changes in regional cerebral blood flow while healthy volunteers made old/new judgements about line drawings of objects. Some objects were tested in the same size and orientation as they had appeared earlier during the study phase of the experiment; other objects were tested in a different size or orientation than when they were studied. Blood flow increases in the vicinity of the hippocampal formation were observed in the same object condition compared with the size change and the orientation change conditions, even though recognition accuracy was affected significantly only by orientation change. Results add to previous findings suggesting that physical similarity between studied items and test cues may contribute to hippocampal activation during episodic retrieval.     

大型钢制焊接双层低温储罐设计建造

介绍了大型钢制焊接双层低温储罐的结构形式、选材、建造、检验及保冷要求 ,结合所设计的低温液氨储罐 ,对设计建造这类储罐必须考虑的一些问题作了分析     

The Michigan benchmark: towards XML query performance diagnostics

We propose a micro-benchmark for XML data management to aid engineers in designing improved XML processing engines. This benchmark is inherently different from application-level benchmarks, which are designed to help users choose between alternative products. We primarily attempt to capture the rich variety of data structures and distributions possible in XML, and to isolate their effects, without imitating any particular application. The benchmark specifies a single data set against which carefully specified queries can be used to evaluate system performance for XML data with various characteristics.     

氢化非晶硅磷掺杂工艺条件的研究

本文对氧化非晶硅磷掺杂的工艺条件进行了研究，得出掺磷氢化非晶硅的电导率随衬底温度、气体流量、气体压力、射频功率、淀积时间的变化关系，为非晶硅的有效掺杂和器件研究提供了依据。     

重力测井用于注CO2油藏监测的理论分析

在３次采油过程中，注采已为广泛应用，但所面临的问题是如何确定油层中注入流体的波及范围、流体前缘位置及推进速度等。利用地震方法进行注采由于受震资料分辨率的限制，只适用于浅层，而其它测井方法由于探测范围限制，揭示井间注采动态又显不足。重力测井具有探测范围大、受井径变化影响小、重复观测周期短、不受目的层埋深限制等优点。通过正演模拟分析表明，重力测井方法不仅可监测ＣＯ２前缘空间位置的变化，而且可以判定ＣＯ