中国当前市场主流混动汽车系统分析

随着新能源汽车技术的不断完善,和新能源汽车在能耗,保养价格,性能,智能化等方面的优势不断增强,新能源汽车越来越受到消费者的欢迎。相较于纯电汽车,混动汽车凭借其更低的价格和巨大的补能速度和续航优势,受到更多消费者的青睐。混动汽车的混动形式多样,消费者往往难以理清其中的区别。本文就混动系统的基本结构,与主流混动系统的优缺点与结构进行简要分析。帮助消费者理清要点,更好地进行车辆选购。

新型双凸极无刷直流增程发电系统及其控制策略

提出一种基于双凸极无刷直流发电机的新型增程式电动汽车车载发电系统,阐述了发电系统及整车动力系统结构及原理,系统分析了其运行原理、控制策略及输出特性。研究了增程式电动汽车在不同工况下,车载发电系统与蓄电池组、驱动系统之间的能量配合关系。基于此提出该增程发电系统的恒功率+恒流控制策略。研制了45kW双凸极无刷直流増程发电系统原理样机,并构建试验平台,实验结果表明,双凸极无刷直流发电系统结构简单可靠、控制灵活,能够在电阻和蓄电池负载下实现恒流/恒功率运行,控制系统能够实现良好的功率和电流跟踪。该新型车载发电系统在新能源汽车动力系统中有重要研究和应用价值。

电动汽车增程器系统的集成化方案

分析增程式电动汽车动力系统结构特点,介绍集内燃机飞轮、发电机于一体及集发电机及其控制器于一体的两种增程器系统集成化方案,以满足电动汽车轻量化和经济性的需求。

一种基于MATLAB/Simulink的增程器控制系统

随着轻型汽车“国VI”排放标准的全面实施和日趋严苛的油耗要求,传统燃油汽车的生产技术要求更高。为了新产车辆达标,并更环保、更加经济的油耗,轻型汽车的技术发展路线经过探索和总结,并形成行业共识,全面进入新“四化”:电动化、网联化、智能化和共享化。其中,电动化是汽车动力系统的革命性改变,纯电驱动和混合动力驱动是电动化的两个方向,混合动力驱动是从传统燃油动力转向纯电动力的一个自然选择,混合动力汽车目前已经形成迅猛的发展势头。在混合动力技术路线中,增程器是其中重要的一个技术方向,对油耗结果和排放性能贡献很突出,增程器控制系统具有很高的研究价值。该文报道一种集成于电机控制器的增程器控制系统,该系统采用MATLAB/Simulink模型化开发,该系统的技术方案具有控制稳定、成本低、匹配快等优点。

增程式电动汽车增程器多目标优化控制策略研究

针对增程式电动汽车增程器系统控制策略优化目标不全面的问题,对发动机的工作点进行设计,综合分析增程器系统的油耗特性、排放特性和振动噪声特性,探讨增程器系统的燃油经济性、排放性和NVH性能的多目标优化控制策略,并利用Cruise软件进行联合仿真,得出增程器系统的全局优化工况点。结果表明,提出的多目标优化控制策略可以提高增程式电动汽车在不同工况点的适应能力,同时能较好地兼顾增程器系统的排放特性和NVH性能。

AN IMPROVED RECURSIVE DOUBLING ALGORITHM FOR THE PARALLEL SOLUTION OF LINEAR RECURRENCE R

An improved recursive doubling algorithm for solving linear recurrence R <n,1>is given,whose parallel time complexity is (τ++τ.) logn when n processors are available,achieving the lower bound in array processor type computation.

Stochastic differential equation software reliability growth model with change-point

This paper presents software reliability growth models(SRGMs) with change-point based on the stochastic differential equation(SDE).Although SRGMs based on SDE have been developed in a large scale software system,considering the variation of failure distribution in the existing models during testing time is limited.These SDE SRGMs assume that failures have the same distribution.However,in practice,the fault detection rate can be affected by some factors and may be changed at certain point as time proceeds.With respect to this issue,in this paper,SDE SRGMs with changepoint are proposed to precisely reflect the variations of the failure distribution.A real data set is used to evaluate the new models.The experimental results show that the proposed models have a fairly accurate prediction capability.

A Development of Augmented Reality Application： AR Band

This study promotes application of Augmented Reality （AR）, whose properties can handle multiple sensory that heightens its quality of performances, affections in first time users, and introduces the possibility and guideline in mass production through the development of＂Augmented Reality Band＂, a gadget based on AR system that allows users to interact with virtual music instruments to make music through the system that analyze printed marker on the shirt. The system is developed by using FLAR Toolkit and made accessible via AR band website. The user can run the system online from anywhere by wearing the shirt printed with embedded musical instruments AR code. In order to promote AR Band performances, the authors assessed the quality of the system from technical professionals. It has been found out that the quality level is very high （4.64/5.00） and the user satisfaction evaluated by sample group has been found in a satisfied level （4.22/5.00）. In summary, AR Band has proven its performances to enhance user satisfaction and its further development and adaptation is under discussion and suggestion section provided at the end.

What Life Is and How It Originated

This paper refutes the mechanistic interpretation of cellular dynamics and contends that the life-giving principle is sustained growth a biological system and is uninterrupted growth balanced in a dynamic state by synthesis and dissolution. The process began by an oxidation/reduction reaction on the surface of pyrite energized photovoltaically by sunlight. Hydrogen sulfide was oxidized, carbon dioxide was reduced, and phosphate on the surface of the pyrite was a reactant. The first organic compounds were sulfides and phosphoglycerates. These organophosphates were at the center of the energy cycle of all life where the dehydration of a relatively unreactive ＂low-energy＂ two-phosphoglycerate transforms it into the ＂high-energy＂ phosphoenolpyruvate. Life began as a growth process and continues to grow ceaselessly out of necessity. It cannot discontinue the life-giving energy flow without irreparable loss of the process. All forms of life past and present were and are stabilized systems in which the growth process is contained in metabolic turnover.

Synergy Model of Artificial Intelligence and Augmented Reality in the Processes of Exploitation of Energy Systems

The article presents a fragment of research and development, which objective was to develop technical tools and methodology to improve exploitation processes of energy systems. The author＇s model includes synergy of artificial intelligence and augmented reality. This solution, which combines modem technologies in order to improve the activities related to the continuity of energy supply, and reduce costs associated with the time needed to carry out exploitation activities and employment of qualified staff, is presented. This paper presents both theoretical foundations as well as the development of technical systems. The characteristics of exploitation processes of energy systems and possible technical conditions, as well as factors characterizing them, are discussed. The physical and software structures of the system and individual modules, as well as dependencies connecting them are demonstrated. The dependencies between physical and logical elements during the exploitation processes of energy systems, that determine decisions related to the evaluation of technical states and related activities are described. The advantages and limitations of the developed model which connects methods of data processing and analysis, interactive visualization processes and possible areas of application are as well discussed in detailed.

Experimental investigation on breaching of embankments

Breaching of embankments has recently drawn more and more attention due to its importance in the development of early warning systems for embankment failures,in the evacuation plans of people at risk,in the design method of embankments based on a risk-approach,etc. The erosion process observed during embankment breaching tests in the laboratory and the analysis of the results are described in this paper. Five embankments,one constructed with pure sand,four with different sand-silt-clay mixtures were tested. The height of the embankments was 75 cm and the width at the crest was 60 cm. Examination of the data from these tests indicated that headcut erosion played an important role in the process of breach growth in the embankments made of cohesive soil mixtures. Flow shear erosion,fluidization of the headcut slope surface,undermining of the headcut due to impinging jet scour and discrete soil mechanical slope mass failure from the headcut were all observed during these tests. For the embankment constructed with pure sand,the breach erosion process was dominated by shear erosion,which led to a gradual and relatively uniform retreat of the downstream slope. The cohesive proportion in the sand-silt-clay mixtures strongly slowed down the erosion process.

Effects of channel blocks on the spiking regularity in clustered neuronal networks

In this paper,we discuss the influences of channel blocks on the spiking regularity in a clustered neuronal network by applying stochastic Hodgkin-Huxley neuronal models as the building blocks.With the aid of simulation results,we reveal that the spiking regularity of the clustered neuronal network could be resonantly enhanced via fine-tuning of the non-blocked potassium channel fraction xK.While the non-blocked sodium channel fraction xNa can enhance the spiking regularity of the clustered neuronal network in most cases.These results indicate that not only sodium channel blocks but also potassium channel blocks could have great influences on the regularity of spike timings in the clustered neuronal networks.Considering the importance of spike timings in neuronal information transforming processes,our results may give some implications for understanding the nonnegligible role of randomness in ion channels in neuronal systems.

HOMOCLINIC ORBITS FOR LAGRANGIAN SYSTEMS

The existence of at least two homoclinic orbits for Lagrangian system (LS) is proved, wherethe Lagrangian L(t,x,y) =1/2∑aij(x)yiyj-V(t, x), in which the potential V(t,x) is globallysurperquadratic in x and T-periodic in t. The Concentration-Compactness Lemma and Mini-max argument are used to prove the existences.