Thermodynamic and Equilibrium Composition Analysis of Using Iron Oxide as an Oxygen Carrier in Nonflame Combustion Technology

Nonflame combustion technology （NFCT） is a harmonious energy utilization technology. There are not environmental-unfriendly gases such as NOx, CO2 discharged in the whole combustion process. Combustion processes realizes zero emission through this technology. Fe2O3 is involved as oxygen carrier, is examined thermodynamically, and the thermodynamic data of the redox reactions are calculated. Using the criteria of minimizing the Gibbs free energy, the equilibrium composition was investigated. The equilibrium analysis shows that producing complete oxidized resultants must have high molar ratio of Fe2O3/CH4. If quantity of Fe2O3 is not sufficient, more partial oxidized products such as CO, H2, even C will be produced.

Thermodynamic Analysis and Experimental Investigation into Nonflame Combustion Technology(NFCT) with Thermal Cyclic Carrier

The utilization of fossil fuels causes serious negative impacts on the environment and human life. To mitigate greenhouse gases and other pollutants, a novel combustion process-the nonflame combustion technology with a thermal cyclic carrier of molten salt is introduced. In this technology, a whole combustion is divided into two steps, i.e., the section of producing oxide and the section of combustion. In the first step, oxygen is separated from air, and pure N_2 is simultaneously formed which is easily recovered. In the other step, the fuels react with lattice oxygen in the oxides formed in the first step, and at the same time, thermal energy, CO_2 and H_2O vapor are produced. It is noted that the CO_2 is easily separated from water vapor and ultimately captured. Theoretically, there are no environmental-unfriendly gases such as CO_2, NO_x and SO_2 discharged in the whole combustion process. Some metal oxides scattered into molten salts play the roles of oxygen carriers in the combustion system, and they can constantly charge and discharge oxygen element from air to fuels during the combustion process. A nonflame combustion system with Li_2CO_3+K_2CO_3+Na_2SO_4 as the molten salt system, CH_4 as the fuel and CuO as the catalyst was experimentally investigated. The experimental results show that the combustion process proceeded as it was theoretically analyzed, and CO_2 with a high volume fraction of 77.0%_95.0% and N_2 with a high volume fraction of 91.9%_99.3% were obtained. The high concentration of CO_2 is favorable for capturing and storing subsequently. Therefore, the potential of reducing CO_2 emissions of this nonflame combustion technology is huge.

Technology Development and Deployment Strategy of Carrier Ethernet

Carrier Ethernet(CE) is gradually stepping away from standardization and testing to deployment and application in live networks.Although great improvement has been made in the reliability of various CE technologies,there is need for improvement in their Quality of Service(QoS),Operation,Administration and Maintenance(OAM),especially the multi-vendor interoperability.The deployment of CE should be service-oriented,and the factors,such as maturity of related technologies and standards,deployment costs,and the complexity of network reconstruction as well as the interoperability with other vendors,should be taken into full consideration to flexibly select appropriate networking technology for different application scenarios according to technical features.

T-MPLS Technology and Application on Carrier Ethernet

As a connection-oriented packet transport technology,Transport Multi-Protocol Label Switching(T-MPLS) is an important bearer technology for Carrier Ethernet(CE).This article starts with the technological characteristics of T-MPLS,then goes on to the latest T-MPLS standardization progress and challenges,followed by the description of T-MPLS based CE architecture.Next,the article covers several key technologies related with T-MPLS,including the data forwarding plane,control plane,network survivability,and Operation,Administration and Maintenance(OAM).Finally,the article analyzes the applications of T-MPLS based CE.

Ring Network Technology for Carrier Ethernet

The fast development of IP services forces the traffic flow in the networks to move gradually from Time Division Multiplexing(TDM) services to packet data services.To adapt to the change,low-cost Ethernet technologies are introduced into the Metropolitan Area Network(MAN).Ring network control protocols and ring network protection technologies are applied to guarantee manageability and reliability required in the telecom networks.The Ethernet Ring Protection(ERP) and Resilient Packet Ring(RPR) are two different ring protection technologies.The Transport Multi-Protocol Label Switching(T-MPLS) network uses the T-MPLS Shared Protection Ring(TM-SPRing) technology to provide ring protection.Carriers can expand the protection as needed and use appropriate ring technologies to meet the requirements of Carrier Ethernet(CE).

Study of the EAST Fast Control Power Supply Based on Carrier Phase-Shift PWM

EAST （experimental advanced superconducting tokamak） fast control power supply is a high-capacity single-phase AC/DC/AC inverter power supply, which traces the displacement signal of plasma, and excites coils in a vacuum vessel to produce a magnetic field that realizes plasma stabilization. To meet the requirements of a large current and fast response, the multi- ple structure of the carrier phase-shift three-level inverter is presented, which realizes parallelled multi-inverters, raises the equivalent switching frequency of the inverters and improves the per- formance of output waves. In this work the design scheme is analyzed, and the output harmonic characteristic of parallel inverters is studied. The simulation and experimental results confirm that the scheme and control strategy is valid. The power supply system can supply a large current, and has a perfect performance on harmonic features as well as the ability of a fast response.

Carrier Ethernet Services and Technologies

Carrier Ethernet(CE) services generally refer to the standardized carrier-class transfer services that feature in excellent scalability,reliability,manageability and Quality of Service(QoS) guarantee,and are offered by carriers to users based on Ethernet technologies.One of the important characteristics of CE service is the diversity of its implementation technologies.Enhanced Ethernet technologies consider scalability as their chief objective so as to extend conventional Ethernet bridge technologies;the latest Provider Backbone Bridge Traffic Engineering(PBB-TE) emerges as the technical trend of CE technology.Multi-Protocol Label Switch(MPLS) offers reliable Pseudowire(PW) connections for CE based on Label Switching Path(LSP).The convergence of MPLS and PBB is one of the important evolution trends for CE.Making full use of the existing Optical Transport Network(OTN) infrastructure,the optical ring network technology is the most cost-efficient and effective way to deliver CE services;its future development trend is characterized by enhancing the Operation,Administration and Maintenance(OAM) function and the control plane.

Impact of proton-induced alteration of carrier lifetime on single-event transient in SiGe heterojunction bipolar transistor

This paper presents an investigation into the impact of proton-induced alteration of carrier lifetime on the singleevent transient(SET) caused by heavy ions in silicon–germanium heterojunction bipolar transistor(SiGe HBT).The ioninduced current transients and integrated charge collections under different proton fluences are obtained based on technology computer-aided design(TCAD) simulation.The results indicate that the impact of carrier lifetime alteration is determined by the dominating charge collection mechanism at the ion incident position and only the long-time diffusion process is affected.With a proton fluence of 5 × 1013 cm-2, almost no change is found in the transient feature, and the charge collection of events happened in the region enclosed by deep trench isolation(DTI), where prompt funneling collection is the dominating mechanism.Meanwhile, for the events happening outside DTI where diffusion dominates the collection process, the peak value and the duration of the ion-induced current transient both decrease with increasing proton fluence, leading to a great decrease in charge collection.

Investigation of Dispersion Compensation in 2.5 Gbit/s OOK Label and 40 Gbit/s RZ-DPSK Payload Optical Label Switching System Based on Optical Carrier Suppression and Separation

Three dispersion compensation schemes of an optical label switching transmission system were investigated, which employs 40 Gbit/s return zero differential phase-shift keying（RZ-DPSK） payload labeled with 2.5 Gbit/s on-off keying（OOK） signal based on the optical carrier suppression and separation（OCSS） techniq ue, In the system, proposed are the receiver sensi ti vity oS payload and label, achieving -- 32. 4 dBm and --38.5 dBm, respectively. Using the optimal dispersion compensation scheme, after transmitted over 160 km and 320 km SMF respectively, the label can be recovered without power penalty, while the payload can be recovered with less than 2 dB and 5 dB penalty, respectively.

不同海况条件下舰载无人机着舰安全分析

针对无人机上舰的使用需求,本文对舰载无人机着舰开展了系统的研究。建立了机-舰-环境综合模型和舰载无人机全自动着舰引导控制系统;基于建立的舰载无人机着舰综合模型对不同海况下的着舰过程进行仿真分析,研究不同海况条件以及航母不同航速和遭遇角对着舰安全的影响。仿真研究表明:在复杂海况下,航母可通过适当提高航速以获得更高的着舰成功率,但过高的航速会导致舰尾流扰动加剧,使得着舰成功率显著下降;通过对仿真结果进行统计分析,给出了不同海况下的着舰安全范围,为无人机着舰辅助决策提供参考。

基于载体环境的宽带微带天线设计与分析

为确保航天环境下载体内的微带天线性能满足通信系统要求,采用多层和多模技术设计了单开槽WiFi频段的宽带微带天线,重点对载体及环境因素下宽带微带天线的性能进行仿真验证,同时分析了对天线性能的影响,并采用迭代补偿方法进行了性能修正。仿真分析结果表明:提出的迭代补偿方法对微带天线性能可以进行有效的校正;实物验证结果表明:载体内的微带天线性能稳定,满足工作频带要求。

微生物固定化技术及在废水处理中的应用

在探究了微生物固定化技术在不同废水环境中的应用情况后,总结了不同微生物固定方法且比较了各种方法的优缺点,并对微生物固定化载体的选择因素及材料分类进行说明。最后,简要讨论了微生物固定化技术在水污染治理实际应用中所存在的问题,并对未来的研究提供了参考方向。

面向激光测振应用的改进相位生成载波解调算法

为了解决相位生成载波解调方案应用于激光测振技术时,系统中存在的非线性失真问题,提出一种改进相位生成载波解调算法。该算法采用低频、大幅值的相位调制和迭代重加权椭圆特殊拟合对两路含有非线性误差的正交信号进行校正以抑制非线性失真。其中,低频相位调制由三角波信号驱动压电换能器生成,确保小信号情况下椭圆拟合结果的准确性。迭代重加权椭圆特殊拟合可以减小离群数据的影响并避免拟合结果退化为双曲线,具有精度高、鲁棒性好和计算效率高的优点。实验结果表明改进相位生成载波解调算法可以有效抑制激光测振实验系统的非线性失真,在不同相位调制深度(0.8~3.4 rad)下解调信号的信纳比和总谐波失真稳定,对应的标准差分别为0.55 dB和0.03%。系统的响应线性度优于99.99%,动态范围可达103.9 dB@500 Hz,总谐波失真为1%且工作频宽为20~8000 Hz。与传统相位生成载波解调方案相比,该算法不仅显著抑制了非线性失真,还克服了椭圆拟合算法在小信号下无法工作的缺点。

微生物固定化技术在铬污染修复中的应用及研究进展

由于铬及其化合物广泛的工业应用,在许多地方造成了不同程度的铬污染,严重危害生态环境和人类健康。生物修复技术因其技术投资和运行成本低而被认为是Cr(VI)污染修复的一种可行的选择。然而,在高浓度Cr(VI)存在下,微生物的损失、对微生物的毒性等因素阻碍了其商业应用。微生物固定化技术(Microbial immobilization technology,MIT)能够克服传统生物修复技术的缺点,具有铬耐受性好、稳定性高、反应速度快、活性高等优点,近年来得到迅速发展,并多次应用于铬污染修复过程。但目前对该技术在铬污染修复中的研究和应用还处于起步阶段。基于此,本文从微生物固定化载体的选择、微生物固定的方法、微生物的筛选、微生物固定化装置等方面对微生物固定化技术在铬污染修复中的应用及研究进展进行综述,并对未来的研究和实际应用提出建议和展望,以期为Cr(VI)污染的修复研究提供有价值的参考。

我国文化创意产品设计的文献综述研究

本文以文创产品设计在我国具有重要地位为研究背景,基于文献计量和内容分析法对我国文创产品设计相关文献研究中的内容、最新理论方法与技术进行系统梳理,探究我国文创产品设计研究现状和未来发展趋势。本研究最终得出以下结论:博物馆文创产品在故宫文创设计的带领下正在不断突破,积极打造独具特色的文创产品设计;图书馆文创产品设计未来发展前景广阔;文创产品与我国传统文化在融合中创新发展;传统村落文创产品设计研究迫在眉睫;文创产品设计研究新方法与技术不断涌现,这些极具价值的研究为我国文创产品设计发展奠定了坚实基础。

屏幕的演化与未来展望——技术文化史视角的溯源与反思

屏幕已然成为人类存在状况的最新征候。信息文明与载体演变共同推动着屏幕时代的来临。文章基于技术文化史视角,聚焦大众的技术使用及其社会文化影响,把屏幕的本质限定于文化消费与文化生活的层面。作为文化消费终端的极致体现,屏幕的演化可分为四个阶段,分别对应了文化消费与文化生活的四次重大变迁:电影屏幕之于“显像”阶段,电视屏幕之于“入户”阶段,电脑屏幕之于“齐一”阶段,手机屏幕之于“独霸”阶段。这一演化历程也体现为虚实融合与载体强化的过程。最终,数字化消解了影像的物质性,也使人与影像之间的中介形式大一统为数字屏幕。屏幕本身的物质局限性引发了人们对于后屏幕时代的畅想,物质性界面的消融则提供了从有屏到无屏的巨大想象空间,而当下屏幕带来的诸多异化也会在未来被更高级的技术形态所制衡。

运用大数据载体创新高校网络思想政治教育探究

高校思政教育工作应充分运用新媒体信息技术手段,在现代网络中采集、捕捉、获取、辨析、筛选、使用大数据,运用大数据载体加强教育者与受教育者之间的交流互动,及时有效地反馈存在的问题,不断改进和优化高校网络思想政治教育。文章基于思想政治教育现实生活大数据分析,对搭建大数据载体硬件平台、系统平台、共享平台以及突破大数据技术壁垒、大数据与新媒介有机连接等方面进行详细的论述,以期为大数据背景下高校网络思想政治教育载体创新提供有力的支撑和有益的借鉴。

某污水处理厂氧化沟原位提标扩容改造设计

广东省某污水处理厂提标扩容改造工程要求处理规模由6×10^(4)m^(3)/d扩容至10×10^(4)m^(3)/d,出水标准由GB 18918—2002《城镇污水处理厂污染物排放标准》中一级B标准提升至准V类地表水标准,且项目改扩建过程需不影响污水处理厂正常运行。受场地限制,该工程采用高浓度复合粉末载体生物流化床技术(HPB技术)强化现有微曝氧化沟,实现生化系统原位提标扩容,同时新建磁混凝沉淀池-反硝化深床滤池深度处理工艺,达到提标扩容目标。在对生化系统施工时序进行优化后,实现了不停水改造。改造后氧化沟运行稳定,氧化沟出水ρ(COD)≤21.86 mg/L,ρ(NH_(3)-N)≤0.5 mg/L,ρ(TN)≤9.82 mg/L,厂区出水稳定达到设计出水排放标准。

智能完井井下负载对测控系统的影响分析

阐述电力线载波通信技术特点、基于智能完井双向通信电路的通信系统仿真模型。探讨室内短距离通信技术中的电力线与合适通信载波频率的选择、井下变功率双向通信系统的应用。

烟尘超低排放技术在湿法脱硫塔上的应用研究

在不对锅炉原有除尘系统进行改动且停炉时间最短的条件下,仅在湿法脱硫塔的上部,安装专利产品—全旋流微湿电除尘除雾装置,使烟尘满足超低排放标准。本文结合应用实践对“全旋流微湿电除尘除雾技术”进行分析研究,为面临烟尘排放难题的企业提供一种新的烟尘解决方案。