Microdisplays are microminiaturized displays with a screen size of less than 25mm. They are highdensity, high-resolution screens used in magnified display systems because of their miniature size. Microdisplays are used in two basic applications: projection microdisplay and near-to-eye display. MEMS are used in microdisplays to process light integrated in the chip, a part of the projector engine. MEMS microdisplays use MEMS substrates along with additional components to enable small pixel pitches and high display resolutions.

A HUD is an indicator that displays key flight information onto a transparent screen positioned in front of a pilot's line of sight. It provides users with a view of the real word overlaid with information and projected onto a screen, thus eliminating the need to look away from the usual viewpoint. The automotive and aviation sectors are the major end-users for HUDs because of the driver or pilot's need for situational awareness, and the enhanced safety margins in these sectors. The primary components of HUDs are.

A smartphone integrates the functionalities of a computer, a PDA, and a cellphone. It consists of an OS (similar to a computer) and offers advanced functionalities, computing abilities, and improved connectivity options when compared to a feature phone. A smartphone supports basic functions such as texting and calling, along with advanced computing functions such as browsing, touch screen display for easy navigation, emailing, entertainment, and Wi-Fi and Bluetooth connectivity. These devices also integrate sensors such as an accelerometer and a gyroscope for users to make motion-based navigation and games. In recent years, smartphone technology has undergone many advances in terms of OS, processors, battery life, and display density, which is gaining traction among consumers, besides exploring many application areas.

MEMS are miniature devices manufactured using microfabrication technology. These devices can vary from one micron to several millimeters. Accelerometers, gyroscopes, and magnetometers are discrete MEMS inertial sensors that are used to detect and measure tilt, shock, rotation, and vibrations in a device. However, two or more types of discrete sensors can be fused together to form what are known as combo sensors. These can perform multiple functions. In the past, MEMS inertial sensors were only used for navigation by the aerospace and military sectors, but they are currently also being used in the automotive, consumer, medical, industrial, and communication sectors. This is because of the small size of MEMS inertial sensors, which enables them to be easily integrated with devices and makes them more efficient and cost-effective compared to their traditional counterparts.

A display driver is an integrated circuit, which acts as an interface between a microprocessor and an LCD to control the display system in mobile phones, desktops, and other devices. The display driver IC receives image data and delivers a current to activate the pixels on the display, which contains liquid crystal. When the liquid crystals receive the voltage, they bend, changing the intensity of the light and combining with the color filter on the glass substrate to produce the whole image on the display panel. Display driver ICs form a significant component of display devices.

A microprocessor is a CPU that acts as the brain of the electronic device it is incorporated in. It is a computational semiconductor device, which is fabricated on a single chip. Over the years, microprocessors have become more powerful and faster, yet increasingly smaller and more affordable. Their superior performance has enabled microprocessors to find applications mainly in computers, smartphones, tablets, gaming consoles, and automobiles.

提出一种基于STFRFT的无源雷达目标时延与多普勒联合估计新方法。首先,给出了一种STFRFT时频分辨率量化方法及其数学表达式;其次,利用STFRFT的投影包络对回波信号时延与Doppler频移进行了联合估计;最后,讨论分析了脉内信噪比、高斯窗参数等对所提方法估计性能的影响。仿真结果表明,与CAF方法相比,所提方法更容易获得高精度的时延与Doppler频移的联合估计,具有更高的可靠性。

在PSN(pocket switched network)中实现数据传输成功率与传输延迟的有效平衡是当前有待解决的问题。提出一种基于社会属性的PSN路由算法——Bridging Com算法,该算法使用带有衰退机制的局部社区识别方法,引入桥接中心度(bridging centrality)作为中继节点的选择依据,将社会网络中节点重要性与移动社会网络的特征相结合,考虑了节点社区关系和节点活跃度对路由算法的影响。实验表明,该算法与现有经典算法相比能够获得较高的传输效率和较低的传输延迟。

Researchers in the area of cognitive radio often investigate the utility of dynamic spectrum access as a means to make more efficient use of the radio frequency spectrum. Many studies have been conducted to nd ways in which a secondary user can occupy spectrum licensed to a primary user in a manner which does not disrupt the primary user's performance. This research investigates the use of opportunistic access in a frequency hopping radio to mitigate the interference caused by other transmitters in a contentious environment such as the unlicensed 2.4 GHz region. Additionally, this work demonstrates how dynamic spectrum access techniques can be used not only to prevent interfering with other users but also improve the robustness of a communication system.

This research presents a tool for laboratory managers to quickly determine if employing a DCV system is potentially life-cycle cost effective. The tool presented is not to be used as sole justification for implementing a DCV system; instead, laboratory managers using this tool will be able to quickly determine if further investigation into DCV installation is warranted. The results show that a DCV system is life-cycle cost effective for many different HVAC system total pressure and square footage combinations.

Embedded memory plays a big role in digital systems applications due to the increase of the data size required by many of these applications, such as video games and communication protocols. Also, the ever-increasing gap between processor speed, main memory, and bus speed (memory wall) creates a need for more on-chip memory to keep the processor busy and increase throughput. In addition to the increase of processor frequency, the integration of many cores or functional units on the same chip, which is referred to as system on chip (SOC), requires larger memory size. Embedded memory compromises more than 50 % of the chip area and greater than 80 % of transistor counts. Increased process variation due to technology scaling and the desire for high density memory results in a big challenge to meet the stringent requirements on performance, power, and yield. Embedded memory does not only play a positive role in system performance, but it also has an impact on yield, timing, and power. Memory organization and early decision made by system level and architecture group have big influence on the role and the impact the memory has on the overall system. Tradeoffs from memory cell type, array organization, memory hierarchy, Design for Test, and overall memory subsystem have to be considered early on.

The objectives of this report are to quantify existing acoustical conditions in Vicksburg National Military Park (VICK) and provide results that can be used for park management and planning. Multiple external sound sources currently impact the soundscape of VICK, including Interstate 20, U.S. Highway 61, Kansas City Southern Railroad, Yazoo Diversion Canal (shipping traffic), and a harbor industrial complex. Inside the park, buses, RVs, motorcycles, and cars create noise along the 16-mile tour road and especially at the Visitor Center and U.S.S. Cairo parking areas. Mississippi Department of Transportation (MDOT) is planning to widen a section of I-20 immediately adjacent to the parks southeast border. MDOT has contracted out the noise analysis for this construction project to Neel-Schaffer, Inc. The company uses 15-minute point measurements and TNM modeling to quantify impacts, but park staff requested more detailed sound monitoring by the Natural Sounds and Night Skies Division.