摘要：This paper presents a new Omni-directional Tilt Sensor (ODTS), which consists of the LED light, transparent cone-shaped closed container, mercury, camera, embedded systems and so on. The volume of the mercury in the container is equal to half of the container’s. When the detected surface is horizontal, the shape of mercury in the image captured by the camera is a black disc since the mercury is lightproof. When the detected surface tilts, the mercury flows and the mercury surface always maintains horizontally due to the gravity force of the earth. At this time, some area of the transparent cone-shaped closed container is not shaded by mercury and the border of the mercury’s shape in the captured image is a half circle and a half ellipse. Thus there is a translucent crescent-shaped area in the image. With analyzing this area by the specific algorithm based on machine vision, the tilt angle and directional angle can be obtained. The experimental results show that the ODTS proposed has some advantages, such as simple maintenance, high precision, wide range, low cost, real-time, reliability and high visualization.

摘要：In order to overcome the main drawbacks of coaxial, waveguide, and stripline couplers, the analysis and the design of a compact coaxial-to-microstrip directional coupler convenient for power and antenna control application, are presented using the method of moments (MoM) in two dimensions. This technique is adapted to study the complex configuration of the line’s system, which does not have a simple analytical solution. The modeling of this structure consists in analyzing the primary inductive and capacitive matrices ([L] and [C]). When these matrices are determined, it is possible to calculate the inductive and capacitive coupling coefficients (kL and kC) and estimate the resulting scattering parameters of the coupler using an adapted numerical model. The coupler can be integrated into a printed circuit board (PCB) and operates over 17 to 35 dB coupling coefficients and is always compensated. The compensation is achieved by the proper displacement of a tuning ground plane with respect to the edge of the PCB from 0.1 to 3.3 mm. As an application, we present the design of a compact coupler with 7.5 × 4.8 × 25.8 mm of size and having approximately 20 dB of coupling coefficient at 2 GHz and a minimum directivity of 23.3 dB in the frequency range [0.1 - 4] GHz. In order to check our numerical calculations by the MoM we made simulations in 3D by using CST MICROWAVE STUDIO software for the same geometrical and physical parameters of our designed coupler. The results obtained by the two numerical models (MoM and CST) show a good agreement of the frequency responses of the coaxial-to-microstrip directional coupler. The studied structure represents a great improvement for high power measurement systems, since it has broad-band, good directivity, and can be easily designed and fabricated.

摘要：建筑设计概念以及城市策略：可能性领域的划分通过维持与原军队营房的索引关系,博物馆的设计提出了建筑与其所在城市文脉的问题。这绝不是对地貌混合拼凑的尝试,而是为了应对平衡场地周边的强势街区脉络,所提出的对弱城市肌理的延续。

摘要：位于千禧公园中部的伯纳姆馆，一侧是密歇根湖，另一侧是密歇根大道，它使得城市的内涵、项目和规模都更加多元化。基于地址的特别之处，伯纳姆馆的设计与严谨的几何形状有着微妙的关系，但它也引出了漂流的、多方向的空间。伯纳姆亭与城市的纹理、千年公园如织的游客相适应，最重要的是为公园和城市周边引入了多元化的景观。伯纳姆馆的墩座和房顶起初是水平的，周边向两侧开放。从设计结构上来说，亭子吸引人们聚集过来，在周围散步或穿过亭子、探索并观察。伯纳姆馆是雕塑的、非常容易进入，其功能作为城市活化剂。

摘要：Y2002-63197-1052 0319491应用 IGBTs 设计一种双向600V/6KA 零电压转换(ZVS)混合式直流开关=Design of a Bi-directional600V/6KA ZVS hybrid DC switch using IGBTs[会,英]/Polman,H.& Ferreira,J.A.//2001 IEEE In-