Investigation into polishing process of CVD diamond films

A new technique used for polishing chemical vapor deposition (CVD) diamond films has been investigated, by which rough polishing of the CVD diamond films can be achieved efficiently. A CVD diamond film is coated with a thin layer of electrically conductive material in advance, and then electro-discharge machining (EDM) is used to machine the coated surface. As a result, peaks on the surface of the diamond film are removed rapidly. During machining, graphitization of diamond enables the EDM process to continue. The single pulse discharge shows that the material of the coated layer evidently affects removal behavior of the CVD diamond films. Compared with the machining of ordinary metal materials, the process of EDM CVD diamond films possesses a quite different characteristic. The removal mechanism of the CVD diamond films is discussed.     

A study of the effects of collector and environment parameters on the performance of a solar powered solid adsorption refrigerator

Based on the heat and mass transfer model validated by experiment, the performance of the plate solar ice-maker is analyzed systemically with the opinion of two-type characteristic parameters, which includes parametric effects of adsorbent bed of solar ice-maker and outer parameters referring to circumstance. A large number of simulations were undertaken to test the performance of the refrigerator for various collector design parameters and environmental parameters. These works are beneficial to further study the optimization design of a solar cooling system.     

中低品位硅钙质胶磷矿富集技术探讨

过去的正反浮选工艺具有产生的磷精矿中MgO含量低，产品脱水性能好的优点，但选矿成本较高，直接经济效益不显著，为此对“矿浆无需加温”、正浮选作业“无碱”、“无碳酸盐抑制剂”、反浮选“无需添加磷酸”的“四无”正反浮选新工艺进行了研究，结果表明：该新工艺具有技术指标先进，选矿成本低的优点。     

基于过程能量综合优化的延迟焦化装置扩大生产能力改造策略

根据延迟焦化流程的特点，分析了延迟焦化装置扩大生产能力的瓶颈，探讨了基于能量综合优化的装置扩能解除瓶颈的策略方法，基于过程能量综合优化，运用流程模拟技术，通过配套的加热炉优化，分馏塔操作优化，换热网络柔性设计等手段，实现了装置扩大生产能力的目的，并运用所提出的策略对某延迟焦化装置进行了基于能量系统优化的扩能改造，在原流程与设备的基础上，装置处理量增大18．2％，装置物耗，能耗大幅度降低，改造设备投资少，说明能量综合优化对工艺装置扩能改造具有重要意义。     

世界地震勘探仪器装备技术发展综述--记新千年首届物探装备技术研讨会

2001年4月，石油物探装备学会在北京召开了新千年首届技术研讨会，本文根据与会外国公司发布的信息，围绕当前地震勘探仪器的技术现状和发展进行了综合评述，并提出了一些看法和观点。     

Texture Changes During the Ripening of Port Salut Argentino Cheese in 2 Sampling Zones

ABSTRACT: Texture changes during ripening of Port Salut Argentino cheese for different sampling zones were studied. Compression relaxation tests were performed and results were analyzed using both Maxwellian and Peleg's models. Elastic equilibrium modulus obtained from the Maxwellian model decreased from 1.22 to 0.11 10⁴Pa during ripening. The constants derived from Peleg's model, k₁ and k₂, diminished with ripening time from 1.18 to 0.71 min and from 1.27 to 1.12, respectively. Asymptotic equilibrium modulus from Peleg's model decreased from 0.95 to 0.07 10⁴Pa during ripening. Rate parameters derived from a 1st order kinetics applied to both equilibrium moduli showed that the decrease was faster in the external zone (0.0846 d⁻¹) than in the central zone (0.0368 d⁻¹). The correlation between equilibrium moduli, salt concentration, moisture content, and maturation indexes was obtained with a determination coefficient of 0.76.     

改进尿素包装工艺 不断提高产品质量

通过对尿素包装工艺的不断改进，提高了尿素粒度、减少粉尘含量，效果明显。     

莱钢中小型连轧生产线技术装备状况及改进

介绍了莱钢引进的具有 90年代国际先进水平的中小型型钢连轧生产线的工艺、设备特点及主要技术参数 ,以及对原机械设备、电气及工艺备件的改进和新产品开发情况 ,均取得良好效果。     

试论降低成本的设计技术

一个新产品的功能和成本水平基本上已在产品设计阶段就确定了。研究降低成本的设计技术就是为了给设计师提供一套行之有效的降低和优化成本的辅助设计工具。降低成本设计的技术内涵是与设计过程并行的成本估算、知识基系统的建立和质量及成本的综合优化。论述了各国对此项技术研究应用的状况、技术分析、发展特点和研究前沿的项目及内容 ,如对此技术研究应用的迫切性、对降低成本的最佳时机和产品的全成本概念等的探讨和认识 ;对成本扩展到产品寿命全周期、对目标成本控制法和成本优化设计等的研究和应用。     

浅谈水利枢纽道路工程建设中的几个问题及其对策

从水利枢纽工程建设的实际出发,分析了枢纽道路建设中的几个值得考虑的基本问题。针对永久性道路的建设环境和建筑特点以及临时性道路的复杂性和多样性,提出了永久性道路和临时性道路建设的基本对策。基于高新技术材料HEC作为道路建筑胶凝材料的实际工程应用,在道路结构布局观念、设计思想、建筑选材和施工工艺及其技术经济性能比等方面提出了枢纽道路工程建设的实施方案,其有效性和可推广性在水布垭道路工程建设中得到了印证。