单圆销外啮合槽轮机构的计算机参数化辅助设计

介绍了运用UG软件对单圆销外啮合槽轮机构进行计算机参数化辅助设计的方法,分析并列出了单圆销外啮合槽轮机构的主动拨盘与槽轮在正常工作条件下的几何关系式,确立了设计时的原始设计参数,创建了槽轮机构设计的原始设计参数与机构结构尺寸之间的参数关系,在此基础上构建了基于UG软件的单圆销外啮合槽轮机构参数化设计的种子文件,应用种子文件实现单圆销外啮合槽轮机构的计算机参数化辅助设计.     

Elastic–plastic solid disk with nonuniform heat source subjected to external pressure

The elastic–plastic stress distribution of a solid disk due to nonuniform heat source under external pressure is investigated in this work. The nonuniform heat generation rate is taken to be a function of the radial position in the form , where a denotes radius of the solid disk; q₀, n and s are constants. The exact solution presented is based on the usual assumptions of plane stress, Tresca's yield condition, its associated flow rule and linear strain hardening material behaviour. According to this analysis, the plastic core in the general case consists of three parts with different forms of the yield condition. The present solution is illustrated by numerical results and is compared with uniform heat generation case. This work provides the basis for a comprehensive investigation of the influence of nonuniform heat generation.     

甘氨酸的反相高效液相色谱分析方法的研究

建立了一种用高效液相色谱法测定甘氨酸的定量分析方法,采用美国SIELC primesep 100色谱柱（250 mm×4.6mm、5μm）,以乙腈/水（10/90）为流动相（用磷酸调节pH=2.0）,选择200nm为检测波长进行检测,表明方法的标准偏差为0.18,变异系数为0.23%,相关系数为0.9999,平均回收率100.13%。方法具有快速、简便、准确、重现性好等特点。     

外磁场激励下管道弱磁应力内检测特性研究

弱磁应力检测技术支持非接触在线应力损伤检测,在长输油气管道应力内检测技术领域具有巨大的应用潜力。但弱磁信号微弱,易受外界环境干扰,检测结果易出现偏差。为加强弱磁信号的检测能力,基于铁磁材料的微观特性,建立了外磁场弱磁应力检测模型,获得了弱磁信号强度随外磁场强度与施加应力的变化规律,描述了外磁场对弱磁应力检测信号的激励特性,并进行了系统的实验研究。结果表明,弱磁信号的切向峰值与法向零点均位于应力集中区的中心位置,且不随应力与外磁场的变化而发生波动;弱磁信号切向峰值与法向峰峰值随外磁场与应力的增加而增大;外磁场对弱磁应力检测信号的激励作用随外磁场的增加先增大后减小。     

浅谈小高层外墙渗水及封堵

在剪筒结构中,模板加固大量使用对拉螺杆,优点是加快了工期,节约了成本,但外墙的螺杆洞和外窗四周渗漏一直是质量通病。经查阅资料,结合现场施工,对外墙螺杆洞和窗四周的封堵防水提出了有效地修补方法。     

浅析油田外部市场廉洁风险的有效防控

以规范权力运行和监督为主线,对油田外部市场廉洁风险防控情况进行研究,有针对性地制定和实施预警预防、制度规范、监督制约等防控措施,可以规范油田外部市场,廉洁从业环境,促进企业健康有效对外发展。     

External quantum efficiency response of thin silicon solar cell based on plasmonic scattering of indium and silver nanoparticles

This study characterized the plasmonic scattering effects of indium nanoparticles (In NPs) on the front surface and silver nanoparticles (Ag NPs) on the rear surface of a thin silicon solar cell according to external quantum efficiency (EQE) and photovoltaic current–voltage. The EQE response indicates that, at wavelengths of 300 to 800 nm, the ratio of the number of photo-carriers collected to the number of incident photons shining on a thin Si solar cell was enhanced by the In NPs, and at wavelengths of 1,000 to 1,200 nm, by the Ag NPs. These results demonstrate the effectiveness of combining the broadband plasmonic scattering of two metals in enhancing the overall photovoltaic performance of a thin silicon solar cell. Short-circuit current was increased by 31.88% (from 2.98 to 3.93 mA) and conversion efficiency was increased by 32.72% (from 9.81% to 13.02%), compared to bare thin Si solar cells.     

Effects of thermodynamically coupled reaction diffusion in microalgae growth and lipid accumulation: Model development and stability analysis

This study investigates and presents the effects of thermodynamically coupled nonisothermal reaction-diffusion processes on microalgae growth, substrate consumption and neutral lipid production in a pond or wastewater treatment plant. The non-stirred chemostat hypothesis and linear nonequilibrium thermodynamics theory are applied to formulate the model equations that account the bulk phase compositions and temperature, resistances to the heat and mass transfers, and cross effects due to the thermodynamic coupling of heat and mass flow in the presence of chemical reaction. Nondimensional forms of the model equations are numerically solved. Bulk phase concentrations and temperatures, external resistances to heat and substrate transfers, and thermodynamic coupling may generate substantial number of new parameters that control the evolution and stability in microalgal growth and lipid production that are important for biofuels. Instabilities due to perturbations in nutrient concentrations may lead to spatial structures where the wavenumber plays important role in reaction diffusion systems.     

苯直接氧化制苯酚反应产物分布测定方法的研究

研究以气相色谱测定苯直接氧化制苯酚反应后产物分布的方法,考察并优化了色谱分析条件。结果表明最佳色谱分析条件为：汽化室温度290℃、检测器温度320℃、升温速率5．0℃／min、载气流速2．0mL／min、分流比120：1、进样量为1μL。采用外标法定量,标准样品的回收率在95％～105％,重复性最大相对标准偏差为1．62％。     

论地球化学外能与内能的转换

岩石在地表条件下具有q值增大规律。岩浆岩和变质岩在地表条件下,吸收太阳等宇宙能转化成沉积岩;在地壳深处,沉积岩释放这些能量转化成岩浆岩或变质岩。能量的上述转换,是通过内生的低晶格能矿物与外生的高晶格能矿物负载者实现的;是通过硅、铝主导控制元素,以及氧、钠、钾、钙、镁和铁等实现的。外能补充内能并通过内能起作用,从而成为改造地球面貌的宏伟运动。