高熵合金氮化物薄膜的研究进展

基于多元高熵合金思想制备的高熵合金氮化物薄膜由于多种元素相互混合,易于产生高熵效应、晶格畸变效应和缓慢扩散效应,使得该新型薄膜体系形成简单的非晶结构和纳米晶结构。依赖于成分和制备工艺,多元高熵合金氮化物薄膜表现出简单的固溶体结构和优异的性能,因而在许多领域极具应用潜力。综述了高熵合金氮化物薄膜的发展概况、组织特点、性能特征、制备方法和应用前景,并对高熵合金氮化物薄膜的发展方向进行了展望。     

Effect of Elastic Energy due to Atomic Size Factor on Ordering and Decomposition Behaviour of Binary Solid Solutions

A theory recently developed by the present authors is applied to the study of the effect of elastic energy due to atomic size factor on the transformation behaviour of binary solid solutions. lt is found that elastic interaction energy (EIE), which is a part of the total elastic energy plays a key role in both ordering elastic interaction ordering (EIO) and spinodal decomposition. The present study gives a reasonable explanation to the historical dilemmas, "elastic energy paradox" and "atomic size factor paradox . By solving these confusing problems, the coexistence of ordering (EIO) and decomposition, which has been regarded as impossible by conventional theories. can be well understood. The mechanism is as follows: lowering of elastic energy demands EIO, and such an ordering provides a driving force for spinodal decomposition. Therefore, in alloys with large atomic size factor, spinodal decomposition is preceded and induced by ordering. Ordering and spinodal decomposition are thus closely related processes to each other     

Silicon-based microelectrode arrays for stimulation and signal recording of in vitro cultured neurons

Microelectrode arrays (MEAs) for stimulation and signal recording of in vitro cultured neurons are presented.Each MEA is composed of 60 independent electrodes with 59 working ones and one reference one.These electrodes are divided into 30 pairs.Through each pair of electrodes,four independent states can be realized to define the accessing modes of neurons cultured on the surface of the electrodes.A total MEA covers an area of 10 mm×10 mm.MEAs are fabricated in a silicon-based semiconductor process.An implemented MEA is bonded on a specially designed printed-circuit-board (PCB) and surrounded by a culture chamber.An impedance measurement has been made to verify the electrical characteristics of MEAs.The surface was modified to enhance the biocompatibility.A series of PC12 cells culture experiments validates the effectiveness of the modification.An extracellular signal recording experiment with acetylcholine (Ach) as a stimulant has been carried out,and the results show the feasibility of MEAs for extracellular action potential recording.Extracellular electrical stimulation and recording experiments have been carried out too.They indicate that MEAs can be used for extracellular stimulation,recording,simultaneous stimulation and recording,and isolation of PC12 cells network cultured in vitro.     

基于引射器的低压瓦斯配气装置

提出了一种新的配制某一浓度瓦斯的技术——基于引射器的低压瓦斯配气技术。该技术利用部分管道输送压力来配制某一浓度瓦斯。采用一维处理方法计算了配气装置中核心部件——引射器的性能参数,并对引射器进行了相关性能实验。结果表明:该技术是可行的。     

一种有创血压模拟器的设计

针对有创血压测量设备研发阶段、校准测试或在教学实验中难以采用人体或动物来做试验的缺点,提出一种新型有创血压模拟器设计方法。该模拟器通过微控制器产生正弦波和各种人体血压波形,输送到扬声器产生振动,利用传动模块和压力传感器将压力变化值传送到上位机作显示分析。实验表明该模拟器具有精度高、波形显示速度快的特点。     

供需链系统重构的方法与工具研究

基于SCOR模型以及供需链的性能分析，提出了一套可操作的供需链系统重构方法，涵盖了供需链的建模、分析、改进、实施等各个阶段，并且介绍了为使供需链系统的重构过程自动化和智能化而自行设计并开发的软件工具—SCEasy Transfer。     

冷镦钢新型脱氧剂的试验研究

采用新型复合脱氧剂和脱氧工艺对冷镦钢进行工业性试验研究，研究结果表明：冷镦钢采用AlMg合金脱氧获得了良好的脱氧效果，可以避免形成大型夹杂物，提高钢水纯净度。     

矿业软件在矿产储量评价中的应用

矿产储量评价的基本内容是建立矿床地质模型进行品位估计和储量分类分级．地质控制条件限制是矿床建模的重要手段。地质统计学方法是矿块品位估计以及储量分级等的有效方法．国内的应用实例表明。国际先进矿业软件是矿产储量评价的先进工具，应用矿业软件进行矿产储量评价是市场经济的需要。     

Surface Movement Regularity of Super-Wide Mining Face With Top-Coal Caving

No.4326 super-wide panel of Wangzhuang Coal Mine ( in which the fully-mechanized top-coal caving longwall mining method was used) was monitored for dynamic characteristic of surface movement. The dynamic surface movement in and after mining was predicted by using the Mining Subsidence Prediction System. The results indicate that after mining, the surface above the super-wide panel reaches a state of full subsidence, making the No.309 national highway above the panel be located on the flat bottom of the subsidence basin so that the influence of mining activity in both sides of 4326 panel on the national highway is the smallest.