采用主监视窗扩展技术的增强现实三维注册方法

在增强现实三维注册中,采用重新检测策略时顿卡现象严重。提出一种采用主监视窗扩展技术的增强现实三维注册方法。在检测阶段,引入特征点可信度和主监视窗,并设计主监视窗的分割、扩展和调控策略,大幅提升了计算速度;在跟踪阶段,采用基于图像金字塔的光流算法进行特征点跟踪。实验证明,该方法不仅有效缓解了顿卡现象,也提升了系统整体的实时性。     

1-苄基-5-苯基-1,2,3-三氮唑的合成

以氯化苄和叠氮化钠为原料,通过叠氮化反应,制得叠氮苄,反应收率达到95.2%。苯乙炔和叠氮苄,通过1,3-偶极环加成反应制得1-苄基-5-苯基-1,2,3-三氮唑,收率26%。该反应是原子经济的绿色化学反应。     

Kinect体感控制性能优化方法

为提高基于Kinect体感应用程序控制识别的稳定性、准确性与鲁棒性,针对手臂光标延迟与身体控制场景内容稳定性的问题,提出在Unity3D平台下的体感控制性能优化方法。基于数据转化思想,通过放宽手臂光标触发成功条件,将单点稳定触发转化为范围稳定触发,实现手臂光标延迟性能优化;通过将身体位置控制场景内容转化为模拟键盘方向键输入的方法,实现身体控制场景内容稳定性优化。实验结果表明,该方法能够有效提高体感应用程序的相关性能。     

3-(S)-(-)-(1-氨甲酰基-1,1-二苯基甲基)吡咯烷的制备

3-(S)-(-)-1-氨甲酰基-1,1-二苯基甲基)吡咯烷是合成抗尿失禁药物达非那新的重要中间体。它由3-(S)-( )-3-羟基吡咯烷盐酸盐经磺酰化和烷基化反应得到3-(S)-( )-(1-氰基-1,1-二苯基甲基)-1-甲苯磺酰基吡咯烷,再经过去磺酰化和水解4步反应制得,总产率为5.1%。     

7-甲基-3-羟基吡唑[4,3-e]并-1,3,4-噁二嗪的合成

以3-甲基-5-吡唑啉酮为原料,合成了标题化合物,并对目标物及文献中未见报道的中间体如3-甲基-5-氧代-4-吡唑啉酮腙衍生物等,通过元素分析I、R1、HNMR和质谱分析确定了其结构。     

The preparation of coupled WO3/TiO2 photocatalyst by ball milling

The coupled photocatalyst WO₃/TiO₂ is prepared by ball milling by doping WO₃ into TiO₂ and using H₂O solution as disperser. The coupled photocatalyst WO₃/TiO₂ is characterized by UV–VIS diffuse reflection spectrum, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD) and Transmission electron microscopy (TEM). The results show that the optimum percentage of WO₃ doped is 3% and that the photocatalytic activity of the coupled WO₃/TiO₂ photocatalyst is much higher than that of TiO₂ and WO₃–TiO₂ with no ball milling. Compared with TiO₂, the photoexcited wavelength range of the WO₃/TiO₂ photocatalyst red-shifts about 50 nm, and the light absorption intensity is also improved. The crystal phase of TiO₂ is not changed and new crystal phases are not found during the process of ball milling. WO₃ and TiO₂ coupled highly, forming the WO₃/TiO₂ photocatalyst. The increased photocatalytic activity of the coupled photocatalyst may be attributed to the enhance charge separation efficiency and the extend wavelength range of photoexcitation.     

2,2-二(3-氨基-4-羟基)苯基丙烷的合成与结构表征

分别在Pd/C、FeOOH和FeCl3·6H2O/C三种不同催化剂存在下,由水合肼还原2,2 二(4 羟基 3 硝基)苯基丙烷(1)合成了2,2 二(3 氨基 4 羟基)苯基丙烷,筛选出成本低、收率高的理想催化剂为FeCl3·6H2O/C。当物料配比n(水合肼):n(1)=5:1,反应起始温度为70℃,反应时间为80min时,收率为93 0%。产物经重结晶纯化后,由元素分析、红外光谱、核磁共振谱和质谱对其结构进行了表征,确证了产物的结构。     

基于龙芯3A处理器的嵌入式操作系统BSP设计技术

以国产龙芯3A处理器为栽体,通过分析多核系统的体系架构和硬件特征,提出了基于龙芯3A处理器的JARI-works操作系统BsP设计的基本思路及关键技术,目前该BSP包已经在项目中得到应用,对其他嵌入式操作系统在龙芯系列处理器上的移植具有一定的参考作用。     

Cr^3＋=Al2（WO4）3晶体生长助熔剂体系的研究

本文用DTA和XRD法研究了Na_2O-Al_2O_3-WO_3三元系中的Al_2(WO_4)_3-Na_2WO_4截面的相平衡关系。在这截面中发现一新化合物AlNa_3(WO_4)_2。以45mol％Na_2WO_4为助熔剂生长了Cr~(3+):Al_2(WO_4)_3晶体。     

Enhanced Photocatalytic Hydrogen Evolution Over CaTi1−x Zr x O3 Composites Synthesized by Polymerized Complex Method

The solid solution of CaTi_1−x Zr _x O₃ (x = 0–0.15) was successfully synthesized by the polymerized complex (PC) method. This study has exhibited the advantage of the PC method to prepare a highly active CaTiO₃ compared with the conventional solid-state reaction (SSR) method. More importantly, further improvement in phase purity and large surface area was achieved by the doping of Zr⁴⁺, leading to remarkable enhancement of photocatalytic activities compared to pure CaTiO₃. The quantum yield for H₂ evolution over the most active photocatalyst, Pt (1.0 wt%)/CaTi_0.93Zr_0.07O₃, was 1.91% and 13.3% in photoreactions from pure water and aqueous ethanol solution, respectively for 0.1 g photocatalyst, which was about 3.3 and 2.5 times compared to that of PC-derived CaTiO₃.