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Based on the character of antibiotics wastewater in some corporation, this article introduces sewage treatment processes, technique principles and characteristics about CASS process, and discusses the effect and problem in debugging run. The results show that the process operates flexible, has good stability, and has high removal effect to COD, BOD and SS, which appear the process is unique and has...
Based on the character of alcohol wastewater in some corporation, this article introduces sewage treatment processes, technique principles and characteristics about UASB & SBR process, and discusses the effect and problem in debugging and operation. The results show that the process operates flexible, has good stability, and has high removal effect to COD, BOD and SS, which appear the process...
Interest in networked control systems has grown rapidly. In some remotely time critical control applications, multiple sensors and actuators are connected to controllers via a shared wireless network. Feedback and control information is transmitted over the network, and the time critical data traffic can tolerate only low bit error probability and bounded delays. This paper investigates control and...
In recent years, the research of nitrogen and phosphorus removal in sewage has been a hotspot in the field of wastewater treatment at home and abroad with the worsening of the world-wide eutrophication of water bodies. Improved A2/O oxidation ditch of Wulongkou sewage treatment plant in Zhengzhou has achieved good effect to remove organic matter, nitrogen and phosphorus in sewage. Based on the operation...
This paper introduces the design and implementation of a wireless sensor network (WSN) gateway with multi-mode access to Internet supporting data collection and video surveillance. The wireless sensor network collects data, while the video surveillance devices are applied for the monitoring of WSN system. Both the wired and the wireless way of Internet access are discussed. Because of the bandwidth...
A kind of quasi-orthogonal space time block code for decode-and-forward relay networks is analyzed in this paper. At the source, 4 single-antenna users transmit the quasi-orthogonal space time block code matrix. At the relay node, maximum-likelihood decoding algorithm is adopted and the decoded symbols are then encoded into quasi-orthogonal code which is transmitted through transmit antenna. At the...
In this paper, the design and implementation of a wireless video surveillance system supporting wide area access based on 3G network is proposed. The main architecture, the software and the hardware design of the video surveillance system are discussed separately. The system is composed by three major components: the video data collection nodes, the video data control Web site and the data terminals...
This paper proposes a novel scheme that combines coded cooperation and truncated ARQ/FEC protocol at the physical and data link layers. Although the coded cooperation method can achieve remarkable diversity gains through independent fading channels, its characters such as bit error rate (BER) and spectrum efficiency are influenced greatly by inter-users' channel qualities. Hence, we introduced the...
A new kind of constellation rotation for quasi-orthogonal space time polarization block code in keyhole channel is introduced in this paper. This kind of space time block code of 4 and 8 transmit antennas are designed, the new codes with full diversity can transmitted through dual-polarized antennas and received through dual-polarized antennas. Last the new codes is compared with the traditional quasi-orthogonal...
In wireless sensor networks (WSNs) application we sometimes only require single moment local field information, but traditional periodical all-network information collecting mode consumes much network resources. In order to satisfy Quality of Service (QoS) demands of information collection in wireless sensor networks, prolong network lifetime and minimize control overheads while insuring connectivity,...
A novel TD-SCDMA system employing ad hoc relaying is proposed in this paper. With the aid of ad hoc relaying, all the mobile stations in TD-SCDMA cellular phone network are dual-mode, using different frequency (2 GHz for TD-SCDMA and 2.4 GHz for ad hoc) and having both ad hoc and TD-SCDMA cellular radios. This makes the terminals more convenient for personal communication. We introduce the system...
Ad hoc networks have brought many varieties of applications for mobile digital devices, such as body area multimedia environment, smart home networks, and sensor networks, etc. However, because batteries carried by each mobile node have limited power, energy efficiency becomes one of the most important issues of ad hoc networks. In this paper, we propose a novel adaptive cluster-head algorithm for...
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