基于ActiveX技术的RFID读卡器控件的编写与使用

随着Web技术和RFID技术在各个领域的广泛使用,将Web软件与RFID读写器的结合使用成为一种广泛的需要。ActiveX控件作为Web软件与RFID外设的一个桥梁,很好地解决了这一问题。研究ActiveX控件的基本机制,一般RFID读度写器的基本功能。以MFC为工具编写RFID读卡器ActiveX控件的方法、过程,同时研究将编译好的ActiveX控件打包、签名、使用的方法,为B/S架构的Web软件与RFID读卡器交互提供了一种思路。     

Application of iron-based cathode catalysts in a microbial fuel cell

Catalysts for the oxygen reduction reaction (ORR) in a microbial fuel cell (MFC) were prepared by the impregnation on carbon black of Fe^II acetate (FeAc), Cl–Fe^III tetramethoxyphenyl porphyrin (ClFeTMPP), and Fe^II phthalocyanine (FePc). These materials were subsequently pyrolyzed at a high temperature. The ORR activity of all Fe-based catalysts was measured at pH 7 with a rotating disk electrode (RDE) and their performance for electricity production was then verified in a continuous flow MFC. Catalysts prepared with FeAc and pyrolyzed in NH₃ showed poor activity in RDE tests as well as a poor performance in a MFC. The ORR activity and fuel cell performance for catalysts prepared with ClFeTMPP and FePc and pyrolyzed in Ar were significantly higher and comparable for both precursors. The iron loading was optimized for FePc-based catalysts. With a constant catalyst load of 2 mg cm⁻² in a MFC, the highest power output (550–590 mW/m²) was observed when the Fe content was 0.5–0.8 wt%, corresponding to only 0.01–016 mg Fe/cm². A similar power output was observed using a Pt-based carbon cloth cathode containing 0.5 mg Pt/cm². Long-term stability of the Fe-based cathode (0.5 wt% Fe) was confirmed over 20 days of MFC testing.     

Windows环境下建筑系列软件ABD的面向对象编程技术特色

建筑系列软件ＡＢＤ是基于ＡｕｔｏＣＡＤ上运行和开发,而最新的ＡｕｔｏＣＡＤ是完全基于Ｗｉｎｄｏｗｓ９５／ＮＴ环境下运行,已不支持ＤＯＳ环境,所以ＡＢＤ软件产品需向Ｗｉｎｄｏｗｓ环境进行移植,才能充分挥Ｗｉｎｄｏｗｓ的资源作用,ＡＢＤ软件版本升级主要利用ＡｕｔｏＣＡＤ Ｒ１４中ＭＦＣ库,面向对象的编程技术ＡＲＸ、ＯＬＥ技术,使ＡＢＯ软件的质量和可维护性更加提高。     

矿用智能锚杆测量仪设计

设计了一种便于携带、使用性强的锚杆测量仪,用来评估现场的施工情况及大面积检测。上位机采用VC++编程,进行通信、打印、数据库存储、检索和排序,下位机采用KEILC编程,进行浮点滤波运算,并实现C和汇编的相互调用。该设计具有很大的推广价值。     

6kV厂用电源快切装置误动原因分析及处理

厂用电源的快速切换技术近年来在大型发电机组厂用电系统中运用日臻完善和成熟,显示出它对确保机组稳定运行的优越性,并已在生产实际中积累了丰富的运行经验。分析了平顶山某电厂应用的2种快速切换装置的原理和使用中出现的问题及解决方法,提出了解决的思路。     

Microbial fuel cell (MFC)-based biosensor for combined heavy metals monitoring and associated bioelectrochemical process

To explore the feasibility and related mechanism of MFC biosensor for wastewater detection under the action of combined heavy metals. Cyclic voltammetry (CV) and scanning electrochemical impedance spectroscopy (EIS) were used to explore the related bioelectrochemical process. The response of the reactor to single/combined heavy metals, low/high heavy metal concentrations, and the differences in ohmic resistance (Rs) and charge transfer resistance (Rct) were investigated using Ni as the core heavy metal and the combined action of Cd, Cu and Zn. The results indicated that there was a linear relationship between the concentration and output voltage of the MFC biosensor under the action of combined heavy metals (R² = 0.8803–0.973). However, the internal resistance (Rint) of the MFC biosensor under the action of single heavy metal was far less than that of the combined heavy metal group, and the power density (19.849 W m^?3) was 4 times that of the combined heavy metal group (3.109–4.589 W m^?3). The Rs of the biosensors in the combined heavy metal group were 0.868Ω and 0.860, which were higher than 0.768Ω of the single heavy metal sensor. With the increase of the concentration of heavy metals in the influent, the increase of Rct was more obvious in the combined group, while the Rs in the single group significantly increased (P < 0.05). The results imply that it is possible for MFC biosensors to be used in the detection of actual water polluted by various heavy metals, but the biosensor performance is mainly limited by Rct, which needs to be further improved.     

基于VC/MFC的滑动轴承设计软件开发

在滑动轴承特性有限元仿真计算的基础上,基于VC/MFC开发了常见结构动静压滑动轴承设计计算软件包。该软件包采用面向对象技术,可以方便地计算不同结构参数滑动轴承的静、动特性系数并进行结果分析。软件包的开发提高了动静压轴承的设计效率,使用方便,易于扩充和维护。     

Integration of microbial fuel cell with independent membrane cathode bioreactor for power generation,membrane fouling mitigation and wastewater treatment

A microbial fuel cell (MFC) was integrated with flat sheet membrane bioreactor (MBR) and studied for electricity generation, membrane fouling mitigation and artificial wastewater treatment. The cell potential was ∼0.2 V with 100 Ω external load during closed circuit operation. Batch tests identified that the sludge properties and aeration in cathodic chamber were the main affecting factors on electricity generation. Integration of microbial fuel cell can significantly alleviate membrane fouling, under closed circuit condition, membrane filtration lasted 21 days – 27 days and under the open circuit condition it lasted only 13 days - 15 days, before the transmembrane pressure (TMP) reached 0.03 MPa. The calculated electrostatic repulsion force between membrane surface and membrane foulant was about 2.5 × 10⁻¹⁴ N in this integrated reactor. The chemical oxygen demand (COD), ammonia nitrogen, phosphorus and offensive smell could be effectively removed by the sequential anaerobic-aerobic treatment system. The effluent pH was neutral and turbidity was very low.     

Effects of initial sediment properties on start-up times for sediment microbial fuel cells

Sediment microbial fuel cells (SMFCs) are being developed as a renewable power source to aid environmental remediation and provide remote monitoring. But long start-up times limit their use as a viable industrial approach. In this study, we sampled sediments from seven different levels of eutrophication lakes and investigated the effects of their initial sediment properties (ISP) on the start-up times of SMFCs. After 60 days, ISP showed a clear influence on SMFCs with start-up times ranging from 7 to 21 days at different sampling sites. Organic matter, especially the labile carbon pools and nitrogen (organic and inorganic) contents in sediment, were closely related to start-up times for the SMFCs. In addition, dehydrogenase activity and high-throughput sequencing revealed that microorganisms in the nutrient enrichment sediments increased organic matter degradation and produced special species such as genus Candidatus Xiphinematobacter that belong to the Verrucomicrobia phyla related to electron transfer. Such active control may improve applicability by accelerating start-up and enhancing SMFC power and bio-catalytic performance.     

Improvement of energy recovery from water hyacinth by using integrated system

The conventional methods for biofuel production provide a clean and renewable approach for bioenergy generation. However, the efficiency of these processes is still too low to compete with the existing technologies. Integrated bioprocesses could help in improving the overall yield and cost-effectiveness of the process. The present study deals with the evaluation of process efficiency in single, two and three-stage operation of dark fermentation, biomethanation and microbial fuels cells for recovering maximum energy from the invasive aquatic plant, water hyacinth. The merits and demerits of each process operated individually or in combination were evaluated. The results showed the integrated three-stage process yielded maximum energy recovery of 60% in the form of hydrogen, methane, and electricity with an overall COD removal of 94%. The present research work thus highlights the possibility of integrated hydrogen or methane-based biorefinery approach for the recovery of bioenergy from biomass.