无线网络仿真的思变

主要讨论网络硬仿真系统（NES）如何应用于无线网络规划并致力于解决无线网络中的覆盖和干扰问题,减少优化工作量。     

Beef tallow biodiesel produced in a pilot scale

In the present work, the process of biodiesel production in a pilot plant has been studied using beef tallow as raw materials with methanol and potassium hydroxide as catalyst. The biodiesel quality is regulated by Brazilian specifications (Resolution 42) by the National Agency of Petroleum (ANP). The alkaline transesterification of animal fat with methanol produces a biodiesel with high quality and also with a good conversion rate. The process is possible but the economical viability must be improved by recovering methanol and glycerin. The obtained results have been used for industrial scale up of the process.     

吸附无细胞百白破-重组乙型肝炎(CHO细胞)联合疫苗的中试工艺

目的探讨吸附无细胞百白破-重组乙型肝炎(CHO细胞)联合疫苗(DTaP-HBV)的中试工艺。方法通过不同的配比条件,探索DTaP-HBV联合疫苗的最佳中试工艺。以此工艺制备3批DTaP-HBV,进行各项指标的检定及稳定性试验。结果配方以无细胞百日咳疫苗原液18μgPN/ml,精制白喉类毒素25Lf/ml,精制破伤风类毒素7Lf/ml,重组乙肝疫苗原液20μg/ml为宜;DTaP-HBV的稀释液选用0.85%NaCl溶液吸附效果较好,各抗原间无干扰作用;不同配合方式对四联疫苗的效力影响不大。3批DTaP-HBV的各项检定指标均符合《中国药典》三部(2005版)要求,且稳定性良好。结论已筛选出DTaP-HBV联合疫苗的最佳中试工艺,以此工艺制备的疫苗安全、稳定、有效。     

基于黑板模型的智能驾驶员辅助决策方法

为降低驾驶员负担、提高任务的有效性和作战生存性,针对智能驾驶员辅助决策系统的系统状态管理模块进行了深入分析,对基于黑板模型的知识组织和调度方法进行研究。并以系统状态管理为例,将飞行员以及领域专家的经验转化成规则。结果表明,该研究为智能驾驶员辅助决策系统在工程中的应用打下了基础。     

Professional design of chemical plants based on problem-based learning on a pilot plant

This work describes a novel teaching methodology and its application in a subject framed in the last course of the master’s degree in Chemical Engineering at the University of Seville. The main aim consists of promoting a way to facilitate professional practice in this field to the students. Authors also aim at guiding the transition to the new learning requirements demanded by the European Higher Education Area (EHEA).The novel methodology is based on the development of a detailed design of a pilot plant that can be further evaluated by the students themselves. Students are also allowed to run experiments at the facility and carry out several standard tests to verify the quality of the results of their works. The novelty of this proposal consists of incorporating a real installation available in our department to drive new learning methodologies applied in Chemical Engineering curricula. The methodology is distributed across several tasks: training (self-learning), project execution and supervision, comparison with a real installation and pilot plant experiences. The application of the proposed teaching methodology provided quality didactic material production, high satisfaction of the students with the new learning approach and the fact that they gained practical experience at industrial scale.     

Strategy for a Scale‐up Correlation in a Dissolved Air Flotation Chamber

Beginning with a laboratory‐scale physical model, a scale‐up correlation for a pilot unit project was determined based on the analysis of dynamic similarity correlations involving the predominant phenomena of a dissolved air flotation (DAF) chamber. The implantation costs of pilot units require special strategies due to the lack of correlations of this type, as novel flotation methods have been considered strictly from an economic standpoint. With the aid of computational fluid dynamics and videos of microbubble and floc flow, inertia and gravity were identified as the predominant phenomena in a DAF chamber. The strategy described herein is simple and reduces the likelihood of future risks in scale‐up investments.     

液压蓄能修井机伺服调速系统设计

液压蓄能修井机调速系统主要由平面连杆机构、先导阀、差动油缸组成,对其平面连杆机构的运动进行分析与设计,并给出设计中注意事项。现场应用表明,该系统节流调速性能好,操作方便,动态响应快。     

Pilot design for sparse MIMO-OFDM channel estimation with generalized shift invariance property

Compressed sensing (CS) based channel estimation is greatly bound by the measurement matrix according to CS theory. We design pilot patterns by minimizing the mutual coherence of the measurement matrix with the generalized shift invariance property (GSIP). GSIP and a corollary are firstly proposed. Then two pilot pattern design schemes termed pilot design with GSIP (PDGSIP) and tradeoff pilot design with GSIP (TPDGSIP) are put forward to design orthogonal pilot patterns based on GSIP for a multiple-input multiple-output orthogonal frequency division multiplexing system. In PDGSIP, a collection of pilot patterns are firstly obtained and then pilot patterns having large mutual coherence are replaced with new ones generated with optimal pilot patterns. TPDGSIP directly produces new pilot patterns based on GSIP to fully exploit the pilot distance of the obtained pilot pattern as soon as one pilot pattern is obtained. Simulation results have shown that, the proposed pilot pattern design schemes are able to obtain the best pilot patterns in comparison to existing methods from the perspective of mutual coherence. Channel estimation performance using pilot patterns designed by proposed schemes precedes that using pilot patterns designed by existing schemes in terms of normalized mean square error and bit error rate.     

Near-Zero Air Pollutant Emission Technologies and Applications for Clean Coal-Fired Power

Coal is the dominant energy source in China, and coal-fired power accounts for about half of coal consumption. However, air pollutant emissions from coal-fired power plants cause severe ecological and environmental problems. This paper focuses on near-zero emission technologies and applications for clean coal-fired power. The long-term operation states of near-zero emission units were evaluated, and synergistic and special mercury (Hg) control technologies were researched. The results show that the principle technical route of near-zero emission, which was applied to 101 of China’s coal-fired units, has good adaptability to coal properties. The emission concentrations of particulate matter (PM), SO₂, and NO_x were below the emission limits of gas-fired power plants and the compliance rates of the hourly average emission concentrations reaching near-zero emission in long-term operation exceeded 99%. With the application of near-zero emission technologies, the generating costs increased by about 0.01 CNY∙(kW∙h)^–1. However, the total emissions of air pollutants decreased by about 90%, resulting in effective improvement of the ambient air quality. Furthermore, while the Hg emission concentrations of the near-zero emission units ranged from 0.51 to 2.89 μg∙m⁻³, after the modified fly ash (MFA) special Hg removal system was applied, Hg emission concentration reached as low as 0.29 μg∙m⁻³. The operating cost of this system was only 10%–15% of the cost of mainstream Hg removal technology using activated carbon injection. Based on experimental studies carried out in a 50 000 m³∙h⁻¹ coal-fired flue gas pollutant control pilot platform, the interaction relationships of multi-pollutant removal were obtained and solutions were developed for emissions reaching different limits. A combined demonstration application for clean coal-fired power, with the new “1123” eco-friendly emission limits of 1, 10, 20 mg∙m⁻³, and 3 μg∙m⁻³, respectively, for PM, SO₂, NO_x, and Hg from near-zero emission coal-fired power were put forward and realized, providing engineering and technical support for the national enhanced pollution emission standards.     

新乙烯回收技术扩大中试装置工艺路线

介绍了中试装置的布置、工艺路线及特点，并简要总结了工程建设过程中的经验。