The photocatalytic activity of CdS can be greatly improved by co-modification of NiS and TiO_2 materials; furthermore the order of connection affects much. A directional electron transfer route via CdS → TiO_2→ NiS ...The photocatalytic activity of CdS can be greatly improved by co-modification of NiS and TiO_2 materials; furthermore the order of connection affects much. A directional electron transfer route via CdS → TiO_2→ NiS is found crucial to the enhancement of ternary catalyst, where TiO_2 acts as an electron reservoir and Ni S works as an effective cocatalyst. Cd S/TiO_2@Ni S with Ni S loaded on TiO_2 has an activity of H_2 evolution 2.5 times higher than NiS@Cd S/TiO_2 with Ni S pre-loaded on Cd S. Faster e-/h+separation rates is obtained of Cd S/TiO_2@Ni S under visible light than under extra UV light irradiation, which in turn demonstrates the importance of directional electron transfer route.展开更多
Functionalized nano-PbS has been prepared and characterized. The functionalized nanoparticles have good dispersibility in water. Reaction of functionalized nanoPbS with gglobulin (gIgG) results an enhanced resonance...Functionalized nano-PbS has been prepared and characterized. The functionalized nanoparticles have good dispersibility in water. Reaction of functionalized nanoPbS with gglobulin (gIgG) results an enhanced resonance light scattering (RLS) around 385 nm. However, when the content of HSA is lower than 0.5 mg ml-1 the RLS enhancement is very weak and is nonlinear to concentration of HSA. Based on these results, a new direct quantitative determination method for gglobulin in blood serum samples without separation is established. Under optimal conditions, the enhanced RLS intensity is in proportion to the gIgG concentration in the range 10500 ng/mL. The limit of detection is 2.75 ng/mL. This method is proved to be very sensitive, rapid, simple and selective for detection of gIgG in blood serum.展开更多
This paper proposes a novel indoor positioning scheme based on visible light communication(VLC).A new indoor VLC positioning scheme using fingerprint database with multi-parameters have been raised.We conduct simulati...This paper proposes a novel indoor positioning scheme based on visible light communication(VLC).A new indoor VLC positioning scheme using fingerprint database with multi-parameters have been raised.We conduct simulation and experimental research on the illumination intensity distribution of several direction parameters.In the experiment,four LED matrixes are identified by LED-ID with room dimensions of 3.75×4.00×2.7 m^3.The results show that the mean of the location error is 0.22 m in the receiving plane,verifying the correctness and feasibility of the positioning scheme.展开更多
The path of a light’s signal is one and the same in the universal space regardless of the inertial frame by which it is identified. However, only one frame can be taken stationary and identified with the universal sp...The path of a light’s signal is one and the same in the universal space regardless of the inertial frame by which it is identified. However, only one frame can be taken stationary and identified with the universal space while all other frames are moving. The direction of the path of a light’s pulse in a moving frame is determined in terms of its direction in the stationary one;the result is utilized to explain stellar aberration and show that the tilted direction in the moving frame depends only on its velocity. The aberration increment vector is introduced and employed to determine the apparent position of a star at each point of the earth orbit. Aberration in an earth satellite relative to the geocentric frame is presented. The direction’s change of a light beam between graded inertial frames promotes explaining aberration in an earth’s satellite in parallel to stellar aberration on earth.展开更多
移动增强现实应用中,用户频繁地与环境中不同的智能物体交互完成任务,其完成效率和用户体验由所采用的定向交互技术决定.然而,从交互手段上来说,现阶段定向交互依赖于Wi-Fi、BLE等无线技术,其信号全向传播的特点使其不能利用用户的空间...移动增强现实应用中,用户频繁地与环境中不同的智能物体交互完成任务,其完成效率和用户体验由所采用的定向交互技术决定.然而,从交互手段上来说,现阶段定向交互依赖于Wi-Fi、BLE等无线技术,其信号全向传播的特点使其不能利用用户的空间环境(即位置和方向)来缩短互动时间,带来了不必要的时间成本;从交互界面上来说,现阶段基于视觉的界面存在可靠性低、扩展性低等问题,进一步限制了系统的通用性.本文介绍了RetroAR——基于可见光逆反射通信的定向交互系统.RetroAR利用了光的定向传播特性来保留用户的空间环境,并依靠逆反射通信实现用户与目标设备之间无连接的快速定向交互.系统实验表明,RetroAR最远可在4 m距离支持100°视角的交互,同时实现厘米级的六自由度(6-Degrees Of Freedom,6-DoF)三维跟踪.用户研究表明,与基于Wi-Fi的解决方案相比,RetroAR将非接触式控制的交互时间减少了2倍,并且具有更好的用户体验.RetroAR借助可见光逆反射通信来利用用户空间环境,保持交互过程中的直观性.用户可以“所指即所控”的方式与多个目标进行互动,实现类似自然交互的快速定向交互.展开更多
基金Supported by the Scientific Research Starting Foundation for Doctors(trxyD H1512)the Foundation for Youth Talent Growth Project in the Ministry of Science and Technology of China(20171184)the Mutual Foundation in the Ministry of Science and Technology of China(20177315)
文摘The photocatalytic activity of CdS can be greatly improved by co-modification of NiS and TiO_2 materials; furthermore the order of connection affects much. A directional electron transfer route via CdS → TiO_2→ NiS is found crucial to the enhancement of ternary catalyst, where TiO_2 acts as an electron reservoir and Ni S works as an effective cocatalyst. Cd S/TiO_2@Ni S with Ni S loaded on TiO_2 has an activity of H_2 evolution 2.5 times higher than NiS@Cd S/TiO_2 with Ni S pre-loaded on Cd S. Faster e-/h+separation rates is obtained of Cd S/TiO_2@Ni S under visible light than under extra UV light irradiation, which in turn demonstrates the importance of directional electron transfer route.
文摘Functionalized nano-PbS has been prepared and characterized. The functionalized nanoparticles have good dispersibility in water. Reaction of functionalized nanoPbS with gglobulin (gIgG) results an enhanced resonance light scattering (RLS) around 385 nm. However, when the content of HSA is lower than 0.5 mg ml-1 the RLS enhancement is very weak and is nonlinear to concentration of HSA. Based on these results, a new direct quantitative determination method for gglobulin in blood serum samples without separation is established. Under optimal conditions, the enhanced RLS intensity is in proportion to the gIgG concentration in the range 10500 ng/mL. The limit of detection is 2.75 ng/mL. This method is proved to be very sensitive, rapid, simple and selective for detection of gIgG in blood serum.
基金supported by ZTE Industry-Academia-Research Cooperation Funds under Grant No.2014ZTE02-12
文摘This paper proposes a novel indoor positioning scheme based on visible light communication(VLC).A new indoor VLC positioning scheme using fingerprint database with multi-parameters have been raised.We conduct simulation and experimental research on the illumination intensity distribution of several direction parameters.In the experiment,four LED matrixes are identified by LED-ID with room dimensions of 3.75×4.00×2.7 m^3.The results show that the mean of the location error is 0.22 m in the receiving plane,verifying the correctness and feasibility of the positioning scheme.
文摘The path of a light’s signal is one and the same in the universal space regardless of the inertial frame by which it is identified. However, only one frame can be taken stationary and identified with the universal space while all other frames are moving. The direction of the path of a light’s pulse in a moving frame is determined in terms of its direction in the stationary one;the result is utilized to explain stellar aberration and show that the tilted direction in the moving frame depends only on its velocity. The aberration increment vector is introduced and employed to determine the apparent position of a star at each point of the earth orbit. Aberration in an earth satellite relative to the geocentric frame is presented. The direction’s change of a light beam between graded inertial frames promotes explaining aberration in an earth’s satellite in parallel to stellar aberration on earth.
文摘移动增强现实应用中,用户频繁地与环境中不同的智能物体交互完成任务,其完成效率和用户体验由所采用的定向交互技术决定.然而,从交互手段上来说,现阶段定向交互依赖于Wi-Fi、BLE等无线技术,其信号全向传播的特点使其不能利用用户的空间环境(即位置和方向)来缩短互动时间,带来了不必要的时间成本;从交互界面上来说,现阶段基于视觉的界面存在可靠性低、扩展性低等问题,进一步限制了系统的通用性.本文介绍了RetroAR——基于可见光逆反射通信的定向交互系统.RetroAR利用了光的定向传播特性来保留用户的空间环境,并依靠逆反射通信实现用户与目标设备之间无连接的快速定向交互.系统实验表明,RetroAR最远可在4 m距离支持100°视角的交互,同时实现厘米级的六自由度(6-Degrees Of Freedom,6-DoF)三维跟踪.用户研究表明,与基于Wi-Fi的解决方案相比,RetroAR将非接触式控制的交互时间减少了2倍,并且具有更好的用户体验.RetroAR借助可见光逆反射通信来利用用户空间环境,保持交互过程中的直观性.用户可以“所指即所控”的方式与多个目标进行互动,实现类似自然交互的快速定向交互.
