TiO2薄膜氧敏特性研究

金属氧化物随氧分压不同，有改变电导率这一性质而被广泛地用来制作氧敏传感器，传统的传感器大多是体材料或厚膜材料，工作时需加高温。本文描述的是ＴｉＯ２薄膜材料与Ｐｔ薄膜形成的肖特基势垒高度随氧分压不同而改变的氧敏现象，测定了该肖特基二极管的氧敏特性，并讨论了它的敏感机理。     

大口径等离子炬与金刚石沉积工艺研究

研制了一种大喷口直径的等离子炬.等离子焰直径可达25mm。利用该等离子炬在氩气—氢气—石油液化气体系中进行了系统的工艺参数试验,获得了质量较高的金刚石膜。简要论述了其应用前景。     

Proton Conduction in a Tyrosine‐Rich Peptide/Manganese Oxide Hybrid Nanofilm

Proton conduction is an essential process that regulates an integral part of several enzymatic catalyses and bioenergetics. Proton flows in biological entities are sensitively controlled by several mechanisms. To understand and manipulate proton conduction in biosystems, several studies have investigated bulk proton conduction in biomaterials such as polyaspartic acid, collagen, reflectin, serum albumin mats, and eumelanin. However, little is known about the bulk proton conductivity of short peptides and their sequence‐dependent behavior. Here, this paper focuses on a short tyrosine‐rich peptide that has redox‐active and cross‐linkable phenol groups. The spin‐coated peptide nanofilm is immersed in potassium permanganate solution to induce cross‐linking and oxidation, simultaneously leading to hybridization with manganese oxide (MnO_x ). The peptide/MnO_x hybrid nanofilm can efficiently transport protons, and its proton conductivity is ≈18.6 mS cm^?1 at room temperature. This value is much higher than that of biomaterials and comparable to those of other synthetic proton‐conducting materials. These results suggest that peptide‐based hybrid materials can be a promising new class of proton conductor.     

聚氯酯工业面临的环境挑战与对策

本文介绍了ＣＦＣｓ对大气环境的破坏作用及为消除其危害所采取的措施，介绍了三代ＣＦＣｓ替代技术，２０１０年前全球将全部停止生产、销售和使用ＣＦＣｓ。     

Miniature orthogonal optical scanning mirror excited by torsional piezoelectric fiber actuator

A novel optical scanner excited by a torsional piezoelectric fiber actuator is presented. The device consists of a piezoelectric fiber actuator generating torsional and longitudinal vibrations simultaneously and a specially designed metal frame transforming the two vibrations to orthogonal deflections of the mirror. Theoretical and experimental studies were performed on the structure. The changing trends of the vibration modes and resonant frequencies were obtained from finite element simulations. Samples with 1 mm × 1 mm mirrors were fabricated from PZT hollow fibers with a diameter of 1 mm and a stainless steel sheet with a thickness of 50 μm. A horizontal scanning angle of 17.9° and a vertical scanning angle of 2.6° were achieved at 6780 and 10,330 Hz under an applied voltage of 400 V_p–p.     

内反馈水润滑高速动静压轴承的应用

针对水润滑高速动静压轴承承载力和刚度下降的问题,根据水润滑条件下,以静压承载为主的特点,在进行水润滑高速动静压轴承结构设计时,引入内反馈。通过数值模拟,证明在主承载区结构参数相同的情况下,采用内反馈后水润滑高速动静压轴承的承载力和刚度得到提高。试验表明,该设计方案对于提高水润滑高速动静压轴承的承载力和刚度效果明显。     

On a functional approximation for inversion of Laplace transforms

Abstract

A functional representation for inversion of the Laplace transform of a function is considered. The function is given in Laguerre polynomials expansion. The coefficients of the polynomials are in terms of weighted moments which are directly determined from the Laplace transform. The applications to rational and irrational Laplace transforms are presented to illustrate the satisfactory results that the method provides.     

聚丙烯的结构与性能表征

从高分子链结构、结晶行为、粘弹性、力学性能４个方面，利用红外光谱（ＩＲ）、核磁共振（ＮＭＲ）、Ｘ射线衍射、示差扫描量热（ＤＳＣ）、流变表征（ＤＳＲ）等手段对国产ＹＳ－８４１催化剂和日本产ＴＫ催化剂生产的丙烯均聚物２４０１和共聚物１３３０的２个系列４种材料进行测试和分析，揭示并比较４种材料在结构和物理性能上的差异，从而指导对国产催化剂的改进。     

洛阳市中心广场二期——周王城广场规划设计

该文介绍了洛阳中心广场二期——周王城广场的规划设计,规划中提出了“展示周文化,畅想洛邑城,解读古轶事,体验中国‘心’”的设计指导思想。在尊重基址现状的基础上,充分利用洛阳周朝丰富的历史文化信息,将其应用于平面布局和铺装、园路等景观要素中,构建成富有历史文化特色满足市民休闲娱乐的综合性历史文化广场。     

多用途液力变径钻头的结构原理及应用

盐层和盐膏层井段引起的盐岩蠕变缩径，不仅易造成卡钻事故．完井后还会挤毁套管，使油井报废。液力变径钻头以其结构简单、开关灵活，操作简便、安全性能高等特点，能够成功地对弹塑性岩层，蠕变盐层、小井眼等井段实施扩眼，尤其对采用爆炸方式松螺纹仍无法起出套管的井，进行下钻一次多点切割，切割成功率高达100％．具有较高的使用价值。