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A low-profile series-fed microstrip antenna and its 8× conformai array are presented. In this paper, the performances of the conformal array are excellent. Its obtained bandwidth is ranging from 0.94f0 to 1.06f0 with the active voltage standing wave ratio (AVSWR) less than 2.3, where the f0 is center frequency of the target band. Moreover, this proposed microstrip array can realize frequency scanning...
A compact low-profile cavity-backed dual circularly polarized (CP) sub-array antenna is proposed in this paper. The proposed C-band antenna array has a 2×2-element microstrip patch antenna. The operating bandwidth of the proposed antenna is ranging from 0.89f0 to 1.11f0 (about 22%) with the voltage standing wave ratio (VSWR) less than 2, where the f0 is center frequency of the target band. Moreover,...
For applications such as electrified automotive powertrains, which require high power density and operating voltages, the lithium-ion battery is an ideal candidate. When individual batteries are combined into packs, a battery management system is needed to safely operate packs consisting of hundreds of cells in series and parallel configurations. While much attention has been given to modeling and...
In this paper, a high speed detection method of aircraft targets in remote sensing images is proposed based on proposal oriented FAST and adaptive matching of local invariant features. In order to reduce the search scope, the region of parking apron is extracted by region growing based on OTSU segmentation. Moreover, Binarized Normed Gradient (BING) and Spectral Residual Saliency (SRS) are applied...
This paper designs and develops a set of real-time monitor and control system of the automatic feeding system of the tank area based on WinCC configuration software, which is based on the automatic control system of the tank area in Zibo Xinhua Pharmaceutical, and introduces the characteristics of Siemens WinCC configuration software. The composition and function of the system and the application...
The purpose of this paper is to introduce a set of automatic feeding system in the tank area, to achieve a variety of material handling precision control. This paper introduces the composition and function of the system and describes the characteristics and application of PCS7 software in the automatic feeding control system. The system was designed and developed based on Siemens PCS7 software. The...
This paper introduces a time-hopping (TH) system for rapid on-off-division duplex (RODD), with this method, virtual full-duplex communication at the frame transmission level can be realized. However because of the randomness of the transmission timing, the slots may have a collision with a high probability. So it's very important to establish a model to calculate the collision ratio, and analyze the...
Instant search has become a common part of the search experience in most popular search engines and social networking websites. The goal is to provide instant feedback to the user in terms of query completions (“instant suggestions”) or directly provide search results (“instant results”) as the user is typing their query. In this paper, we describe the challenges that we faced while delivering the...
A conformal low-profile cavity-backed slot antenna array is proposed in this paper. This proposed antenna array has 8-element cavity-backed slot antenna. The operating bandwidth of the proposed antenna array is ranging from 0.96f0 to 1.04f0 (where the f0 is center frequency of the target band) with the voltage standing wave ratio (VSWR) less than 2. Moreover, the depth of the cavity is only about...
In the case of electricity market reform, the electricity market is becoming increasingly active, and transacted electricity quantity is growing unceasingly and the tradable format is on the increase. Because of the limited energy resources, the level of transaction efficiency has become the focus of attention. In the face of resources diversity of electricity purchasing and selling, power grid carries...
Direct power purchase by large consumers is a hot issue in electric system reform of the present stage. The reform of power market is steadily boosted which allows large consumers to participate in market competition directly. With the development of retail power market, large consumers can choose purchasing electric energy among spot market, long-term contract trade power market and autonomous power...
In this work, a novel design tor a tully on-chip 3D antenna operating at 4 THz that can be fabricated by a novel MEMS (micro electro mechanical systems) technology directly realized on a silicon substrate is presented. The antenna includes two parts, the metallic helix and the microstrip on the substrate for feed. The proposed antenna structure is well suitable designed by MEMS technology, the fabrication...
The scale operation in various forms of rural land circulation in China is the way for the development of modern agriculture, and is also the basic direction of agricultural reform. The right to rural land contractual management registration makes the position of cadastral land and its interrelated information, as contractor and area, clear by Geographic Information Systems (GIS). That supplied a...
In the monitoring industry, such as shopping malls, bus stations, etc., it is necessary to analyze the passenger flow system. Traditional statistical method, the influence factors on the performance of the system, such as illumination, occlusion, body posture. This paper presents a new method based on kinect2.0 sensor depth data of passenger flow detection system, are determined by the shape of the...
Land subsidence in Beijing has occurred since the 1970s. Five major subsidence areas have formed: Dongjiao Ba Lizhuang-Da Jiaoting, Dong Beijiao-Lai Guangying, Changping Shahe-Ba Xianzhuang, Daxing Yufa-Lixian, and Shunyi-Ping Gezhuang. In this study, we investigated Chaoyang, Shunyi, and Tongzhou districts, which have experienced relatively serious subsidence, and obtained land subsidence monitoring...
A design of conformal dipole antenna array for aircraft applications is presented. This 6-element array is conformed to the wing of the aircraft. Furthermore, it is shown numerically that the proposed conformal array exhibits good VSWR and fine radiation properties in the operation band. The active VSWR is less than 1.6 without beam scanning for 0.88ƒ0 to 1.1ƒ0 (where the ƒ0 is center frequency of...
The module of ultra wide band RF front-end pre-selection is designed in this paper under the idea of software radio, which effectively solves the problems brought by mirror frequency in the superheterodyne receiver. The electrically tuned filters are finally chosen to realize the pre-selection. The ultra wide band RF signal from 30∼400MHz is divided into three channels. We control three electrically...
This paper mainly analyzes the impact of the maximum transmission unit (MTU) on application performance by using OPNET. Simulation models are created and amount of experiments for typical FTP applications are conducted. Based on comparisons with different MTU value and different scenarios corresponding to the FTP upload response time, optimal settings are found.
TCP and UDP are two important protocols in the network transport layer. In this paper, we study the effects of TCP and UDP on the performance of the application. Based on OPNET simulation software, a simple FTP application simulation model was created and the experiment was carried out. In order to test the influences of different transport protocols on the performance of application in different...
This paper proposes two filter bank multicarrier (FBMC) schemes for optical communication in intensity modulation direct detection (IM/DD) channel with and without direct current (DC) bias. The aim is to overcome some inherent drawbacks of the commonly used optical orthogonal frequency division multiplexing (OFDM) schemes. Key transceiver principles are designed to accommodate the requirements of...
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