This thesis investigates performance analysis for nonlinear systems, which consist of both known and unknown dynamics and may only be defined locally. We apply combinations of integral quadratic constraints (IQCs), developed by Megretski and Rantzer, and sum-of-squares(SOS) techniques for the analysis.

关键词：积分二次型约束；平方和技术；非线性系统；系统性能

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This research aims at designing a non-invasive, low-cost, and portable imaging device for cancer screening. Conceptualization, architectural and system-level design, and finally implementation of the system called TUSI, Time-Domain Ultra-Wideband Synthetic Imager, are addressed. Using an array of closely controlled radiating silicon chips, acting as transceivers in microwave /mm-wave frequencies, this device transmits short “beam-steered” pulses and picks up reflections from tissue abnormalities (e.g. cancerous tissue). By processing the data from multiple transceivers, a larger aperture is synthesized. In essence, this imager probes the “electrical” properties of the tissue.

关键词：超宽带；时域；成像仪；收发器；硅技术；癌症筛查

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A legged crawler's unsteady dynamics are explored with an emphasis on how these affect optical flow estimation, which mediates navigation. The optical flow algorithm's gains are further tuned using policy gradient reinforcement learning so as to improve motion estimation for specific unsteady regimes. This approach is demonstrated in an obstacle avoidance scenario.

关键词：光流法；移动机器人；相机运动；运动补偿

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Quantum confinement, or reduced dimensionality on each side of a pn junction has the added benefit of significantly increasing the tunnel conductance at the turn-on threshold.

关键词：隧道开关；阈值；pn结维度

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There is a fundamental conductance ÷ voltage limit in low voltage (<4kT/q) tunnel switching devices that obtain a sharp turn off by relying upon the band edges to abruptly cut off the available density of states.

关键词：低压开关；电导；电压；限制

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A stand alone, mobile photovoltaic power system along with a cable deployment system was designed and constructed to take part in the Desert Research And Technology Studies (RATS) lunar surface human interaction evaluation program at Cinder Lake, Arizona. The power system consisted of a photovoltaic array/battery system. It is capable of providing 1 kW of electrical power. The system outputs were 48 V DC, 110 V AC, and 220 V AC. A cable reel with 200 m of power cable was used to provide power from the trailer to a remote location. The cable reel was installed on a small trailer. The reel was powered to provide low to no tension deployment of the cable. The cable was connected to the 220 V AC output of the power system trailer. The power was then converted back to 110 V AC on the cable deployment trailer for use at the remote site. The Scout lunar rover demonstration vehicle was used to tow the cable trailer and deploy the power cable. This deployment was performed under a number of operational scenarios, manned operation, remote operation and tele-robotically. Once deployed, the cable was used to provide power, from the power system trailer, to run various operational tasks at the remote location.

关键词：光机电；电力系统；光电转换；电力传输

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We present BAS,an application programming interface and runtime that addresses these issues using a fuzzy query API, a graph representation of building metadata and a hierarchical driver model for building components.We demonstrate and evaluate BAS by exploring three applications enabled by this architecture.Specifically, we focus on a class of applications that incorporate occupant feedback into building operation.

关键词：建筑；程序化；可移植性；系统设计

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We find that a plot of absolute conductance, I/V versus voltage, V, in an Esaki diode or a backward diode will reveal a best limit for the band tails, defined by the tunneling joint density of states of the two band-edges. This joint density of states will give information about the prospective subthreshold swing voltage that could be expected in a tunneling field effect transistor.

关键词：隧道二极管；反向二极管；频带边缘陡度；电流；电压

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This work demonstrates a new technique for achieving high optical Q on chip, a fully-integrated tunable filter with ultra-narrow minimum bandwidth, and the effect of material choice and device design on optical Q, mechanical Q and phase noise in microring optomechanical oscillators.

关键词：回音壁模式；光学谐振器；光通信；变频调速

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High-speed extended term (HSET) time domain simulation (TDS) is intended to provide very fast computational capability to predict extended-term dynamic system response to disturbances and identify corrective actions. The extended-term dynamic simulation of a power system is valuable because it provides ability for the rigorous evaluation and analysis of outages which may include cascading. It is important for secure power grid expansion, enhances power system security and reliability, both under normal and abnormal conditions. In this chapter the design of the envisioned future dynamic security assessment processing system (DSAPS) is presented where HSET-TDS forms the core module. The power system is mathematically represented by a system of differential and algebraic equations (DAEs). These DAEs arise out of the modeling of the dynamic components such as generators, exciters, governors, automatic generation control, load tap changers, induction motors, network modeling and so on. To provide very fast computational capability within the HSET-TDS, this chapter motivates the need for high performance computing (HPC) for power system dynamic simulations through detailed modeling of power system components and efficient numerical algorithms to solve the resulting DAEs. The developed HSET-TDS is first validated for accuracy against commercial power simulators (PSSE, DSA Tools, Power-World) and then it is compared for computational efficiency. The chapter investigates some of the promising direct sparse linear solver for fast extended term time domain simulation and makes recommendation for the modern power grid computations. The results provide very important insights with regards to the impact of the different numerical linear solver algorithms for enhancing the power system TDS.

关键词：光机电；电力系统；动态模拟

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