A semi‐adaptive control approach to closed‐loop medication infusion

This paper presents a semi‐adaptive control approach to closed‐loop medication infusion problems. The rationale underlying this approach is to design a controller that can adapt model parameters with a large impact on the model's fidelity while fixing the remaining parameters at nominal values. In this paper, a control‐oriented model for this purpose is derived via system identification and sensitivity analysis of a low‐order model capturing the direct dose‐response relationship Using the model thus derived, a model‐reference adaptive controller and a composite adaptive controller are designed and compared with each other. In‐silico simulation results using remifentanil's effect on respiratory rate as an example indicate that both controllers can regulate the output at commanded set points. Copyright © 2016 John Wiley & Sons, Ltd.     

An incremental intrusion detection system using a new semi‐supervised stream classification method

In recent years, the utilization of machine learning and data mining techniques for intrusion detection has received great attention by both security research communities and intrusion detection system (IDS) developers. In intrusion detection, the most important constraints are the imbalanced class distribution, the scarcity of the labeled data, and the massive amounts of network flows. Moreover, because of the dynamic nature of the network flows, applying static learned models degrades the detection performance significantly over time. In this article, we propose a new semi‐supervised stream classification method for intrusion detection, which is capable of incremental updating using limited labeled data. The proposed method, called the incremental semi‐supervised flow network‐based IDS (ISF‐NIDS), relies on an incremental mixed‐data clustering, a new supervised cluster adjustment method, and an instance‐based learning. The ISF‐NIDS operates in real time and learns new intrusions quickly using limited storage and processing power. The experimental results on the KDD99, Moore, and Sperotto benchmark datasets indicate the superiority of the proposed method compared with the existing state‐of‐the‐art incremental IDSs.     

煤化工工艺技术发展趋势浅析

本文主要针对目前煤中低温干馏的工艺技术现状,从节能降耗、资源充分利用角度探讨洁净型煤化工工艺技术的发展趋势,对煤的中低温热解技术的选择具有重要意义。     

国富炉低阶煤热解技术在兰炭行业的市场竞争力

介绍了国富炉技术的开发背景及当前我国兰炭行业的生产现状,国富炉具有科技创新优势,采用低能耗、低物耗的中低温热解方式进行低阶煤的分质转化利用,实现了中低温热解的工业化运行,煤气、焦油、半焦产品收率高,品质好,并可实现灵活调控,能量利用率高,装置可长周期运行,综合性能和指标达到国际领先水平;推广应用国富炉技术可促进兰炭行业的持续健康发展。     

Experimental study of the solid-liquid phase equilibria at the Si-rich region of the Cr-Nb-Si system

High temperatures solid-liquid equilibria in the Cr-Nb-Si system are poorly known in the Si-rich area (>20% at Si). In this study, twenty-two as-cast samples were prepared and fully characterized using X-ray diffraction, scanning electron microscopy and quantitative energy dispersive spectrometry. Obtained results lead us to propose a new schematic layout of the liquidus projection of this system.     

半逆施工方法在安钢球团块矿工程中的应用

本文对土层锚杆支护、钢板桩支护、半逆施工在深基坑施工中应用进行比较,通过施工工艺、经济、安全等方面进行综合评定,最终确定半逆施工方法作为本工程的施工方法。实践中发现该方法不仅简单易行,而且成本较低。     

A new control algorithm to protect nonlinear base‐isolated structures against earthquakes

Currently, nonlinear base isolation systems are widely used in the construction of earthquake resistant structures. However, they are found to be vulnerable in near‐fault regions as a result of long‐period pulses that may exist in near‐source ground motions. Various control strategies including passive, active and semi‐active control systems have been studied in order to handle this issue. In this study, a semi‐active control algorithm based on the different performance levels anticipated from an isolated building during different levels of ground shaking was developed. The proposed performance‐based algorithm is based on a modified version of the well‐known semi‐active skyhook control algorithm. A series of analyses were performed on the base‐isolated benchmark building, suggested by the American Society of Civil Engineers committee, subject to seven pairs of scaled ground‐motion records. The results proved that the new control algorithm is successful in improving structural and nonstructural performance of isolated buildings under near‐fault earthquakes. Copyright © 2012 John Wiley & Sons, Ltd.