高纯水电极测量微量HCL的应用

本文主要介绍了在PVC装置中利用高纯水电极测量微量HCL的方法,取代了HCL专用分析仪,极大地降低了生产成本,为PVC装置的稳定生产奠定了一定的基础。     

Performance enhancement in Ge pMOSFETs with <1 0 0> orientation fabricated with a Si-compatible process flow

The electrical characterization of Ge pMOSFETs having <1 1 0> and <1 0 0> orientations with gate lengths of 3 μm have been demonstrated with a Si-compatible process flow. Employment of <1 0 0> orientation in Ge pMOSFETs without incorporation of strain provided ∼10% enhancement in effective hole mobility and drive current when compared to <1 1 0> oriented regular transistors. In this fabrication technology, the effective hole mobility improves from 190 cm²/V s for <1 1 0> devices to 210 cm²/V s for the <1 0 0> oriented Ge devices at room temperature, which is ∼2 times the hole mobility of Si pFET devices. This study also presents first time investigation of post metallization anneal (PMA) at 350 °C in H₂ ambient for <1 0 0> Ge pMOSFETs. The overall performance of the devices has been enhanced by 15% after performing PMA. It is likely attributed to a strong decrease of D_it, improving the transistor performance. These results indicate that the <1 0 0> Ge pMOSFETs could be a viable candidate for future low voltage high speed CMOS applications.     

一种过滤器微粒沉积量实时检测技术的研究

本根据过滤器微粒过滤及再生的需要，提出了一种过滤体微粒沉积量实时检测技术。叙述了微粒检测原理，介绍了从功率容量的要求出发对检测天线进行设计的方法；并对实际测量结果及影响因素进行了分析。通过实验结果验证了这一技术的可行性。     

Impact of solution chemistry on viral removal by a single-walled carbon nanotube filter

This study investigates the effectiveness of a single-walled carbon nanotube (SWNT) filter for removal of viruses from water. MS2 bacteriophage viral removal was examined over a range of environmentally relevant solution chemistries, spanning various ionic strengths, monovalent and divalent salts, pH, and natural organic matter (NOM) concentrations. Viral removal by the SWNT filter was governed by physicochemical (depth) filtration. The removal of viruses increased at higher ionic strengths (NaCl) due to suppression of repulsive electrostatic interactions between viruses and SWNTs. Addition of divalent salts, however, had varying impacts. While CaCl₂ increased virus removal, likely due to complexation of calcium ions to viral surfaces, addition of MgCl₂ reduced viral removal by the SWNT filter. Solution pH also had significant impact on viral removal as the interactions between viral particles and SWNTs changed from attractive below the virus isoelectric point (about pH 3.9) to repulsive at higher pH. Suwannee River NOM was shown to be detrimental to filter viral removal. Reduction of viral removal by NOM was attributed to adsorption of NOM macromolecules to viruses and SWNTs, thereby resulting in steric repulsive forces. Modifications of the filter to incorporate thicker SWNT layers mitigate the negative impacts of NOM on filter performance. This study has shown that while it is possible to attain high levels of viral removal over a broad range of solution chemistries, the extent of viral removal will be highly dependent on the specific solution chemistry of the treated water.     

Small-molecule gas sorption and diffusion in coal: Molecular simulation

Injections of carbon dioxide (CO₂) into unmineable coalbeds can both enhance coalbed methane recovery (ECBM), a high-efficiency energy, and realize underground storage of CO₂. In these processes, the diffusion and sorption of methane (CH₄) and carbon dioxide are key dominant processes. In this study, the diffusion and sorption behavior of CH₄ and CO₂ in coal are investigated and compared based on molecular simulation. The calculated diffusion coefficient of CO₂ was in the order of 10⁻⁹ m²/s, which is reasonably close to the experimental result. The sorption isotherms were obtained using the grand canonical Monte Carlo method. Coal tended to adsorb more CO₂ than CH₄ at a given temperature and pressure. The sorption heat of CO₂ was larger than that of CH₄ (7.9 and 5.8 kcal/mol respectively), accounting for the fact that the CH₄ adsorbed in the coal seam could be replaced by CO₂. This presents an alternative method for directly studying the interactions between coal macromolecule and small-molecule gases under various external environments.     

固液分离用微孔陶瓷过滤板的性能设计及制备

简述了固液分离用陶瓷过滤板的高效节能机理 ,讨论了微孔陶瓷性能设计的关键要素 ,介绍了陶瓷过滤板的制备工艺。     

视频监控系统中的图象预处理技术

主要分析和讨论工业图象预处理的基本技术与方法，并介绍了近年来发展的图象预处理中的软计算方法。     

Enhanced colliding bodies optimization for design problems with continuous and discrete variables

Colliding Bodies Optimization (CBO) is a new multi-agent algorithm inspired by a collision between two objects in one-dimension. Each agent is modeled as a body with a specified mass and velocity. A collision occurs between pairs of objects and the new positions of the colliding bodies are updated based on the collision laws. In this paper, Enhanced Colliding Bodies Optimization (ECBO) which uses memory to save some best solutions is developed. In addition, a mechanism is utilized to escape from local optima. The performance of the proposed algorithm is compared to those of standard CBO and some optimization techniques on some benchmark mathematical functions and three standard discrete and continuous structural design problems. Optimization results confirm the validity of the proposed approach.     

固井过程中井壁虚泥饼的可冲刷性研究

井壁泥饼的存在对固井质量的影响很大,往往会造成水泥环第二界面胶结变差,引起油气水窜,破坏井筒密封完整性。从流体的剪切应力出发,分析了水泥浆在偏心环空下产生的壁面剪应力大小。并利用水利工程中河流泥沙起动理论,分析了要冲刷掉泥饼需要的临界起动剪应力。最后通过比较环空各处2个力的大小,确定环空泥饼的可冲刷性。能够清晰反映固井过程中环空每个周相角下和整个环空的泥饼可冲刷性。研究表明,泥饼颗粒和厚度对泥饼可冲刷性影响很大,套管偏心也会对其产生影响。     

基于表面等离激元的谐振腔侧面耦合MDM结构波导滤波器色散关系及透射谱

研究了一类L形和矩形谐振腔侧面耦合MDM结构亚波长表面等离激元滤波器的色散关系和透射谱。研究结果表明等效折射率的实部和虚部在短波部分变化较大,在长波部分（800 nm-2000 nm）趋于稳定值,传播距离随着波长的增加和介质层厚度的增加均增加,当波导宽度在50 nm以上时,SPPs的传播距离在所研究的波长范围为4-9 um,可以满足纳米光子器件的尺寸要求;通过对侧面 型谐振腔和矩形谐振腔耦合的透射谱研究表明在保持腔体总长度不变的情况下,两种耦合方式所产生的光谱曲线完全相似,说明禁带的出现只与谐振腔的长度有关系,对集成光子器件的研发具有一定的参考意义。