Substrate temperature-controlled precursor reaction mechanism of PEALD-deposited MoOx thin films

Journal of Materials Science - Molybdenum oxide (MoOx) films had been grown by using plasma-enhanced atomic layer deposition (PEALD) with Mo(CO)6 precursor and O2 plasma reactant in a substrate...     

锚网煤巷综掘过断层施工技术

分析了断层附近的围岩特点和对掘进工程的影响,介绍了垂巷断层和顺巷断层下掘进机的使用方法和锚网支护工艺。     

电镀通孔开路问题的分析和改善

文章对电镀通孔开路问题进行了分析,主要讲述问题形成的要素和原因,并提出相对应的改善措施.     

标志性与生活化的长江走廊——重庆万州北滨路景观设计

对万州北滨路景观设计的理念与创新进行了介绍。项目通过对"城市、人、滨江走廊、长江"四者关系的梳理,打造"江在城中游,人在江岸行,岸随江潮落"三环紧扣的立体景观。项目的成功实施,为三峡库区城市滨水公共开放空间设计提供了一个可持续发展的范例。     

Annealing temperature controlled crystallization mechanism and properties of gallium oxide film in forming gas atmosphere

Gallium oxide (Ga₂O₃) films had been fabricated on Al₂O₃(0001) substrate by employing pulsed laser deposition (PLD) and annealed at different temperatures under forming gas (FG) atmosphere (95% N₂ + 5% H₂). The influence of annealing temperature on the structural, optical, chemical composition, and surface morphological properties of the Ga₂O₃ thin films was investigated comprehensively. The annealing processes with hydrogen gas play a crucial role in the characteristics of Ga₂O₃ thin films. A crystallization mechanism of Ga₂O₃ films controlled by annealing temperature has been proposed firstly and analyzed systematically, which contains three kinds of competitive mechanism, namely the thermal enhanced crystallization, the enhanced H₂ dissociative adsorption on Ga₂O₃ surfaces, and the high-temperature decomposition of Ga₂O₃. Both Ga⁺ and Ga³⁺ oxidation valence states were presented in all samples, which indicated lattice oxygen deficiency in Ga₂O₃ films. The variation of the non-lattice oxygen proportion of Ga₂O₃ films related to the crystallization mechanism firstly increased and then decreased with the increase of annealing temperature. The detailed crystallization mechanism of PLD-Ga₂O₃ films annealed in FG offers a guideline and references for the further fabrication of high-quality Ga₂O₃ films and their applications in high-performance devices.     

基于WebGL的3D动画实时播放系统

由于受到网络带宽及三维动画数据量过大等因素的影响,三维动画如果要在网络上一次性传输往往需要花费比较长的时间.这不仅影响了动画播放的实时性,同时,传输过程中数据的不完整也会造成动画播放不流畅.通过对基于WebGL的三维动画实时播放关键技术的研究,提出模型文件预加载、文件压缩传输等方法,在有限带宽的条件下将三维动画内容实时传输到用户端,利用WebGL技术实现三维模型的创建和渲染,并在此基础上实现三维动画实时播放,使用户能够直接通过浏览器进行观看,或参与到场景交互中.     

Switching curve policy for manufacturing systems with no backlogpermitted

For failure-prone manufacturing systems with deterministic machine up time, the switching curve policy, which has a special property and can be characterized by a single parameter, was shown to be optimal. In previous work, the problem of optimal production rate control was studied under the assumption that backlog is allowed. In this paper, the authors consider manufacturing systems in which backlog is not permitted. The authors show that the switching curve policy is still optimal in this case. They also consider the system model in which one machine has three states: down, idle, and operational. This model can reduce maintenance times of the machine, and then reduce its maintenance costs