维美德高得率制浆最新技术与装备

近年来,随着国家经济的高速发展,市场贸易往来频繁,商品包装需求逐年增多,相应地,包装用纸需求也逐年提高,成为供不应求的少有几个品种之一。废纸,尤其是进口废纸是生产包装用纸的主原料之一,大部分包装用纸全部由废纸为原料生产的。2012年曾进口废纸达3007万吨,进口废纸浆量占总用浆量的比例为25.7%。2021年起,中国将全面禁止废纸进口。那么,每年2000多万吨进口废纸浆的原料缺口如何弥补呢?

Real-time energy optimization of HEVs under-connected environment: a benchmark problem and receding horizon-based solution

In this paper,we propose a benchmark problem for the challengers aiming to energy efficiency control of hybrid electric vehicles(HEVs)on a road with slope.Moreover,it is assumed that the targeted HEVs are in the connected environment with the obtainment of real-time information of vehicle-to-everything(V2X),including geographic information,vehicle-to-infrastructure(V2I)information and vehicle-to-vehicle(V2V)information.The provided simulator consists of an industrial-level HEV model and a traffic scenario database obtained through a commercial traffic simulator,where the running route is generated based on real-world data with slope and intersection position.The benchmark problem to be solved is the HEVs powertrain control using traffic information to fulfill fuel economy improvement while satisfying the constraints of driving safety and travel time.To show the HEV powertrain characteristics,a case study is given with the speed planning and energy management strategy.

An overview of various control benchmarks with a focus on automotive control

There exists a gap between control theory and control practice,i.e.,all control methods suggested by researchers are not implemented in real systems and,on the other hand,many important in dustrial problems are not studied in the academic research.Benchmark problems can help close this gap and provide many opportunities for members in both the controls theory and application communities.The goal is to survey and give pointers to different general controls and modeling related benchmark problems that can serve as inspiration for future benchmarks and then specifically focus the benchmark coverage on automotive control engineering application.In the paper reflections are given on how different categories of benchmark designers,benchmark solvers and third part users can benefit from providing,solving,and studying benchmark problems.The paper also collects information about several benchmark problems and gives pointers to papers than give more detailed information about different problems that have been presented.

Editorial

Control theory is the field that is deeply connected with mathematics.To control a physical process or a dynarnica!system,the control law,so-called control algorithm,is usually deduced in mathematical way.This leads a lot of control theorist to work on"pure control theory"and leave from the physical background.The gap between control theory and practice is sometimes pointed out by the engineers,since a lot of advaneed control methods provided by the research comm unity of control theory cannot be directly implemented for solving many in dustrial problems.Benchmark problem plays the role of bridge between the theoretical research and industrial practice.Usually,a benchmark problem is proposed by academic community or jointly with industrial community to highlight challengi ng issues in a focused problem with comm on interested practical backgro und.For control problem,many technical committees of international federation of automatic control(IFAC)proposed a lot of benchmark problems in the past.These benchmark problems attracted attention from both of theorist and control practitioners,especially younger researchers and students,and pushed control theorist to challenge practical problem and innovation in industrial control technology.This special issue focused on the benchmark problems in automotive system control which are mainly organized by I FAC technical committee and the related community such as the society of instrument and control engineers(SICE),Japan.