Driving a vehicle is one of the most common daily yet hazardous tasks. One of the great interests in recent research is to characterize a driver’s behaviors through the use of a driving simulation. Virtual reality te...Driving a vehicle is one of the most common daily yet hazardous tasks. One of the great interests in recent research is to characterize a driver’s behaviors through the use of a driving simulation. Virtual reality technology is now a promising alternative to the conventional driving simulations since it provides a more simple, secure and user-friendly environment for data collection. The driving simulator was used to assist novice drivers in learning how to drive in a very calm environment since the driving is not taking place on an actual road. This paper provides new insights regarding a driver’s behavior, techniques and adaptability within a driving simulation using virtual reality technology. The theoretical framework of this driving simulation has been designed using the Unity3D game engine (5.4.0f3 version) and programmed by the C# programming language. To make the driving simulation environment more realistic, the HTC Vive Virtual reality headset, powered by Steamvr, was used. 10 volunteers ranging from ages 19 - 37 participated in the virtual reality driving experiment. Matlab R2016b was used to analyze the data obtained from experiment. This research results are crucial for training drivers and obtaining insight on a driver’s behavior and characteristics. We have gathered diverse results for 10 drivers with different characteristics to be discussed in this study. Driving simulations are not easy to use for some users due to motion sickness, difficulties in adopting to a virtual environment. Furthermore, results of this study clearly show the performance of drivers is closely associated with individual’s behavior and adaptability to the driving simulator. Based on our findings, it can be said that with a VR-HMD (Virtual Reality-Head Mounted Display) Driving Simulator enables us to evaluate a driver’s “performance error”, “recognition errors” and “decision error”. All of which will allow researchers and further studies to potentially establish a method to increase driver safety or alleviate “driving errors”.展开更多
If single chip micro computer controls light-emitting diode(LED),it needs abundant peripheral resources,but in this way,it is not convenient to be expanded,modified and maintained.In order to overcome these shortcomin...If single chip micro computer controls light-emitting diode(LED),it needs abundant peripheral resources,but in this way,it is not convenient to be expanded,modified and maintained.In order to overcome these shortcomings,field programmable gate array(FPGA)is used to control LED.The hardware design uses low power consumption and high performance device EP1C6Q240C8.Quartus II is the software development environment.There are three modules built under the software development environment:divided clock module,word stock module and LED dot matrix display module,and these independent modules are connected to be a whole system.Finally,32×64 dot matrix display is realized successfully.It is convenient for the customer to adjust the three independent modules according to actual demands and it is easier to realize online updation.展开更多
索尼日前宣布已开发出下一代自发光显示技术＂CrystalLED Display＂,并在2012国际消费电子展上展示了一台55英寸、支持1080高清显示的＂Crystal LED Display＂电视原型机,成为全球首台采用LED背光源的55英寸1080高清自发光式电视机。＂C...索尼日前宣布已开发出下一代自发光显示技术＂CrystalLED Display＂,并在2012国际消费电子展上展示了一台55英寸、支持1080高清显示的＂Crystal LED Display＂电视原型机,成为全球首台采用LED背光源的55英寸1080高清自发光式电视机。＂Crystal LED Display＂是一种结合了索尼独特方式的自发光式显示技术,展开更多
早在苹果公司还被称为苹果电脑公司的时候，苹果电脑在我们心中就一直拥有至高无上的地位，而当时令我们揣度不透的是，苹果的设计为何如此迷人？其实苹果产品设计的黄金法则不在于工艺精致、用料讲究，而在内蕴于设计中的激情与创新。...早在苹果公司还被称为苹果电脑公司的时候，苹果电脑在我们心中就一直拥有至高无上的地位，而当时令我们揣度不透的是，苹果的设计为何如此迷人？其实苹果产品设计的黄金法则不在于工艺精致、用料讲究，而在内蕴于设计中的激情与创新。它贯穿到苹果的每款产品之中，如同万有引力一般随产品至始至终存在，也同样存在于Apple Mac mini和Apple LED Cinema Display——2009年具有最强大眼球引力场的家庭组合之中。展开更多
Vehicular speeds are of particular interest in areas with a high number of pedestrians due to the fact that 14-percent of all fatal crashes involve pedestrians. This study investigated the effect of a radar speed disp...Vehicular speeds are of particular interest in areas with a high number of pedestrians due to the fact that 14-percent of all fatal crashes involve pedestrians. This study investigated the effect of a radar speed display sign placed for an extended period of time, at a location frequented by law enforcement on a road segment entering a university campus with a high number of pedestrians and vehicle speed violations. The statistical analysis included a comparison between AM peak, PM peak, and midday speeds collected one year apart. The data suggested that radar speed display signs can remain effective over a long period of time;causing drivers to decelerate when warned of a speeding violation. While other studies have examined long-term impacts of similar technologies, none have included a road entering a University campus. Thus, these findings support that other similar locations entering university campuses could see long-term benefits to stationary radar speed display signs.展开更多
We propose a large parallax barrier by use of aperture grille. Main advantages of using aperture grille include no reflection and no absorption in apertures, as well as wide viewing angle. These advantages are investi...We propose a large parallax barrier by use of aperture grille. Main advantages of using aperture grille include no reflection and no absorption in apertures, as well as wide viewing angle. These advantages are investigated with theoretical calculations and experiments by use of several kinds of LED panels, such as a fine-pitch LED panel and a 140-inch large LED panel. Limitations of viewing angle by parallax barrier are analyzed in conventional black stripes on a transparent substrate type and in aperture grille type. Experimental results straw use of aperture grille increases contrast and reduce reflection on the aperture surface.展开更多
给出了一个基于C PL D/FPG A设计的软件模块化L E D显示电路.通过串行扫描方式驱动LE D数码管,可较少地占用可编程器件资源;并利用M A X P LU S II对动态扫描L E D显示电路进行仿真.最后,对动态扫描显示下数码管的亮度降低的原因进行分...给出了一个基于C PL D/FPG A设计的软件模块化L E D显示电路.通过串行扫描方式驱动LE D数码管,可较少地占用可编程器件资源;并利用M A X P LU S II对动态扫描L E D显示电路进行仿真.最后,对动态扫描显示下数码管的亮度降低的原因进行分析,认为采用降低扫描频率,增大脉冲光对人眼的作用时间和增大驱动电流来提高LE D显示器亮度.展开更多
This paper presents a design scheme of SDRAM controller based on FPGA. The paper analyze the basic operation principle of SDRAM, and introduce the state machine and the arbitration mechanism. Simulation verification i...This paper presents a design scheme of SDRAM controller based on FPGA. The paper analyze the basic operation principle of SDRAM, and introduce the state machine and the arbitration mechanism. Simulation verification in QuartuslI development environment using Verilog language show that the system achieve high-speed data caching and transmission. The design method of each module and the realization process in the overall design is introduced in detail. The experimental results show that： the controller design is flexible, stable and reliable operation, low cost. can be used as IP core for the cache system in different SOC_展开更多
文摘Driving a vehicle is one of the most common daily yet hazardous tasks. One of the great interests in recent research is to characterize a driver’s behaviors through the use of a driving simulation. Virtual reality technology is now a promising alternative to the conventional driving simulations since it provides a more simple, secure and user-friendly environment for data collection. The driving simulator was used to assist novice drivers in learning how to drive in a very calm environment since the driving is not taking place on an actual road. This paper provides new insights regarding a driver’s behavior, techniques and adaptability within a driving simulation using virtual reality technology. The theoretical framework of this driving simulation has been designed using the Unity3D game engine (5.4.0f3 version) and programmed by the C# programming language. To make the driving simulation environment more realistic, the HTC Vive Virtual reality headset, powered by Steamvr, was used. 10 volunteers ranging from ages 19 - 37 participated in the virtual reality driving experiment. Matlab R2016b was used to analyze the data obtained from experiment. This research results are crucial for training drivers and obtaining insight on a driver’s behavior and characteristics. We have gathered diverse results for 10 drivers with different characteristics to be discussed in this study. Driving simulations are not easy to use for some users due to motion sickness, difficulties in adopting to a virtual environment. Furthermore, results of this study clearly show the performance of drivers is closely associated with individual’s behavior and adaptability to the driving simulator. Based on our findings, it can be said that with a VR-HMD (Virtual Reality-Head Mounted Display) Driving Simulator enables us to evaluate a driver’s “performance error”, “recognition errors” and “decision error”. All of which will allow researchers and further studies to potentially establish a method to increase driver safety or alleviate “driving errors”.
文摘If single chip micro computer controls light-emitting diode(LED),it needs abundant peripheral resources,but in this way,it is not convenient to be expanded,modified and maintained.In order to overcome these shortcomings,field programmable gate array(FPGA)is used to control LED.The hardware design uses low power consumption and high performance device EP1C6Q240C8.Quartus II is the software development environment.There are three modules built under the software development environment:divided clock module,word stock module and LED dot matrix display module,and these independent modules are connected to be a whole system.Finally,32×64 dot matrix display is realized successfully.It is convenient for the customer to adjust the three independent modules according to actual demands and it is easier to realize online updation.
文摘索尼日前宣布已开发出下一代自发光显示技术＂CrystalLED Display＂,并在2012国际消费电子展上展示了一台55英寸、支持1080高清显示的＂Crystal LED Display＂电视原型机,成为全球首台采用LED背光源的55英寸1080高清自发光式电视机。＂Crystal LED Display＂是一种结合了索尼独特方式的自发光式显示技术,
文摘早在苹果公司还被称为苹果电脑公司的时候，苹果电脑在我们心中就一直拥有至高无上的地位，而当时令我们揣度不透的是，苹果的设计为何如此迷人？其实苹果产品设计的黄金法则不在于工艺精致、用料讲究，而在内蕴于设计中的激情与创新。它贯穿到苹果的每款产品之中，如同万有引力一般随产品至始至终存在，也同样存在于Apple Mac mini和Apple LED Cinema Display——2009年具有最强大眼球引力场的家庭组合之中。
文摘Vehicular speeds are of particular interest in areas with a high number of pedestrians due to the fact that 14-percent of all fatal crashes involve pedestrians. This study investigated the effect of a radar speed display sign placed for an extended period of time, at a location frequented by law enforcement on a road segment entering a university campus with a high number of pedestrians and vehicle speed violations. The statistical analysis included a comparison between AM peak, PM peak, and midday speeds collected one year apart. The data suggested that radar speed display signs can remain effective over a long period of time;causing drivers to decelerate when warned of a speeding violation. While other studies have examined long-term impacts of similar technologies, none have included a road entering a University campus. Thus, these findings support that other similar locations entering university campuses could see long-term benefits to stationary radar speed display signs.
文摘We propose a large parallax barrier by use of aperture grille. Main advantages of using aperture grille include no reflection and no absorption in apertures, as well as wide viewing angle. These advantages are investigated with theoretical calculations and experiments by use of several kinds of LED panels, such as a fine-pitch LED panel and a 140-inch large LED panel. Limitations of viewing angle by parallax barrier are analyzed in conventional black stripes on a transparent substrate type and in aperture grille type. Experimental results straw use of aperture grille increases contrast and reduce reflection on the aperture surface.
文摘给出了一个基于C PL D/FPG A设计的软件模块化L E D显示电路.通过串行扫描方式驱动LE D数码管,可较少地占用可编程器件资源;并利用M A X P LU S II对动态扫描L E D显示电路进行仿真.最后,对动态扫描显示下数码管的亮度降低的原因进行分析,认为采用降低扫描频率,增大脉冲光对人眼的作用时间和增大驱动电流来提高LE D显示器亮度.
文摘This paper presents a design scheme of SDRAM controller based on FPGA. The paper analyze the basic operation principle of SDRAM, and introduce the state machine and the arbitration mechanism. Simulation verification in QuartuslI development environment using Verilog language show that the system achieve high-speed data caching and transmission. The design method of each module and the realization process in the overall design is introduced in detail. The experimental results show that： the controller design is flexible, stable and reliable operation, low cost. can be used as IP core for the cache system in different SOC_
