有杆泵—喷射泵复合举升系统动力液优化设计研究

轮古油田井深油稠,地层供液能力较差,单一的举升工艺很难适应油田生产的需要,因此应用了以稀油为动力液的有杆泵—喷射泵复合举升系统。为了解决目前稀油用量较大的问题,提出了产出液和混合液作为复合举升系统动力液方案,分别建立了其黏度、密度和稀油比例的模型,并分别对稀油、产出液、混合液以及活性水作为复合系统动力液展开可行性分析,通过对比计算得出掺稀比例为0.5时的混合液为最佳动力液方案。对该混合液作为复合举升系统动力液开展了实例计算和现场应用,结果表明该动力液系统可以维持较高的泵效,同时使得单位体积稀油携带能力得到很大的提高,从而极大地节约了稀油资源。     

尘埃粒子的半导体激光散射测量

以半导体激光为光源 ,建立了一个可以实时测量空气中尘埃粒子的尺寸与颗粒数浓度的光学系统。根据Mie散射理论 ,计算了该光学系统的光散射响应特性。实验结果表明 ,该系统具有高的计数准确度、计数效率和计数重复性 ,适用于洁净度检测和环境空气中尘埃粒子的粒径分布测量。     

微弯型光纤传感器光源光强的新的稳定方法

本文详细报导了该装置的原理，内容和测量结果，并指出进一步研究方向。     

轻质油藏注空气低温氧化机理数值模拟

为了探讨油藏注空气的氧化机理,在原油氧化实验的基础上,建立了低温氧化动力学模型,运用热采数值模拟技术,研究了高含水期油藏注空气后含油饱和度、温度、气体运动和原油粘度的变化规律,对比了烟道气成分和注.入气体对采收率的影响。模拟结果表明,注空气后含油饱和度明显降低,氧化前缘的最高温度可达190℃,原油消耗氧气量为589m³/m³(标准状况下)。氧气在到达生产井之前基本耗尽,注空气驱油技术是安全的。注空气形成的烟道气中N₂与CO₂体积比越小,采收率越高。     

带有锥状反射结构的AlGaInP键合衬底LED

本研究通过光辅助化学腐蚀技术在衬底键合AlGaInP反极性发光二极管中制备出锥状反射镜结构提升器件的光提取效率。首先利用氢氟酸与双氧水在532nm激光的辐射下载GaP:Mg层制备出锥状腐蚀结构,然后将金属反射镜蒸镀在锥状结构之上制备锥状的反射镜结构。在完成全部芯片工艺后,测试结果表明锥状反射镜结构可以显著提升光提取效率,并在光通量测量中与表面粗化集成平板反射镜LED相比较,得到了18.55%的增强。     

1‐Methyl‐2‐(anthryl)‐imidazo[4,5‐f][1,10]‐phenanthroline: A Highly Efficient Electron‐Transport Compound and a Bright Blue‐Light Emitter for Electroluminescent Devices

A new organic blue‐light emitter 1‐methyl‐2‐(anthryl)‐imidazo[4,5‐f][1,10]‐phenanthroline ( 1 ) has been synthesized and fully characterized. The utility of compound 1 as a blue‐light emitter in electroluminescent (EL) devices has been evaluated by fabricating a series of EL devices A where compound 1 functions as an emitter. The EL spectrum of device series A has the emission maximum at 481 nm with the CIE (Commission Internationale de l'Eclairage) color coordinates 0.198 and 0.284. The maximum luminance of devices in series A is 4000 cd m^–2 and the best external quantum efficiency of device series A is 1.82 %. The utility of compound 1 as an electron injection–electron transport material has been evaluated by constructing a set of EL devices B where 1 is used as either the electron‐injection layer or the electron injection–electron transport layer. The performance of device series B is compared to the standard device in which Alq₃ (tris(8‐hydroxyquinoline) aluminum) is used as the electron injection–electron transport layer. The experimental results show that the performance of 1 as an electron injection–electron transport material is considerably better than Alq₃. The stability of device series B is comparable to that of the standard Alq₃ device. The excellent performance of 1 as an electron injection/transport material may be attributed to the strong intermolecular interactions of 1 in the solid state as revealed by single‐crystal X‐ray diffraction analysis. In addition, compound 1 is a colorless material with a much larger highest occupied molecular orbital–lowest unoccupied molecular (HOMO–LUMO) gap than Alq₃, which renders it potentially useful for a wide range of applications in EL devices.     

Large‐area epitaxial silicon solar cells based on industrial screen‐printing processes

Thin‐film epitaxial silicon solar cells are an attractive future alternative for bulk silicon solar cells incorporating many of the process advantages of the latter, but on a potentially cheap substrate. Several challenges have to be tackled before this potential can be successfully exploited on a large scale. This paper describes the points of interest and how IMEC aims to solve them. It presents a new step forward towards our final objective: the development of an industrial cell process based on screen‐printing for > 15% efficient epitaxial silicon solar cells on a low‐cost substrate. Included in the discussion are the substrates onto which the epitaxial deposition is done and how work is progressing in several research institutes and universities on the topic of a high‐throughput epitaxial reactor. The industrial screen‐printing process sequence developed at IMEC for these epitaxial silicon solar cells is presented, with emphasis on plasma texturing and improvement of the quality of the epitaxial layer. Efficiencies between 12 and 13% are presented for large‐area (98 cm²) epitaxial layers on highly doped UMG‐Si, off‐spec and reclaim material. Finally, the need for an internal reflection scheme is explained. A realistically achievable internal reflection at the epi/substrate interface of 70% will result in a calculated increase of 3 mA/cm² in short‐circuit current. An interfacial stack of porous silicon layers (Bragg reflectors) is chosen as a promising candidate and the challenges facing its incorporation between the epitaxial layer and the substrate are presented. Experimental work on this topic is reported and concentrates on the extraction of the internal reflection at the epi/substrate interface from reflectance measurements. Initial results show an internal reflectance between 30 and 60% with a four‐layer porous silicon stack. Resistance measurements for majority carrier flow through these porous silicon stacks are also included and show that no resistance increase is measurable for stacks up to four layers. Copyright © 2005 John Wiley & Sons, Ltd.     

大气气溶胶和云雾粒子的激光雷达比

对探测大气气溶胶和云雾粒子的激光雷达的关键参量——激光雷达比问题进行了详细的讨论，利用实际大气气溶胶和云雾粒子的光学特性对0．532μm和l.064μm波长上的激光雷达比进行了计算分析，得到了各种气溶胶粒子组份和典型的集合状态以及云雾粒子的激光雷达比。发现激光雷达比和粒子的物理、光学性质密切相关，不同种类的粒子的激光雷达比有巨大的差异，并且两个波长上激光雷达比的相互关系也不相同，这些结果为激光雷达探测大气气溶胶和云雾粒子提供了依据。     

微型显示器技术(一)

什么是理想的便携式显示器？有一类便携式显示器体积小,重量轻,功耗低,能够显示几乎充满你视野的、大而明亮的高清晰度图像,这就是本文介绍的一类新型显示器件--微型平板显示器,文中描述了微显示器的主要应用领域及技术发展现状,并粗略介绍了相关的生产工艺技术.