前向式混合动力系统模型中控制器建模与仿真

在Matlab／Simulik和Matlab／Stateflow平台上建立了某一混合动力汽车的前向式仿真模型及控制器模型．研究了基于PID控制和模糊逻辑控制的两种驾驶员模型，通过仿真过程对该前向式混合动力系统控制器模型进行了验证，并对两种驾驶员模型控制器的控制效果进行了比较。     

南柳高速公路加铺沥青混合料设计与试验研究

文章介绍了采用空隙填充法进行中面层KH25沥青混合料配合比设计的过程,并对各项路用性能进行了试验研究。试验结果和南柳高速公路的实际应用表明,KH25沥青混合料粗集料含量较常规的粗粒式沥青混合料增大,属于密断级配骨架密实结构,施工不离析,密实耐久性好,抗车辙能力强,是良好的沥青路面的中面层材料,有较大的推广应用价值。     

EXPRESSION AND SIGNIFICANCE OF MYOFIBROBLAST IN HEALING PROCESS OF BILE DUCT

One of the difficulties of biliary surgery lies inthe treatment of iatrogenic biliary stricture that isexpressed prominently after operation as scar con-tracture and anastomotic stenosis, especiaI1y theanastomotic stenosis at the porta hepatis and thearea above it. ln order to exp1ain the mechansim ofthe formation of iatrogenic biliary stricture, an ani-mal model of trauma--repair of bile duct was madein this experiment and the expression of myofi-broblast (MFB) during the whole process was ob…     

EFFECT OF PREOPERATIVE CHEMOTHERAPY ON METASTASIZED LYMPH NODES IN PATIENTS WITH ADVANCED ESOPHAGEAL CARCINOMA

Recent advances in surgical teChniques and pe-rioperative management have significantly im-proved the resect rate, long-term survival and op-erative mortality of patients with esophageal can-cer. However, treatment of surgery only does notimprove the extremely poor prognosis of the pa-tients with local advanced squamous cell carcino-ma[lj. Multimodal therapy is needed to improve theprognosis for patients with locally advancedesophageal cancer. Most investigators have foundthat adjuvant treatme…     

调度监督维护系统设计问题的研究

针对铁道部调度监督系统(DMIS)中维护子系统设计模式问题,综合运用路由器技术,网络技术,数据库技术,提出相应的设计思想、实现方法及其安全防护措施,并有效地运用于具体实践中.     

新型航行信号灯系统开发与应用

为改进传统航行信号灯系统,减少灯具数量,便于安装维护,提高航行信号灯系统功能,按照"一灯双源"与"可变色"的设计理念,从光源整合、控制器优化以及线路改进入手,提出新型航行信号灯系统设计方案.设计产品通过了振动、盐雾、高低温、色度、外壳防护、绝缘电阻、传导发射等系列试验,获得CCS船级社产品认可证书,符合《1972年国际海上避碰规则》、海安会MSC.253(83)决议等要求.新型航行信号灯系统功能更为全面,采用可寻址式布线方式,减少电缆长度,提高了系统运行可靠性,具有"双灯"合一、多灯兼用、操作便捷的特点,在多艘散货船上装备使用,获得用户好评.     

CATIA modeling method of ship hull with hull line as data input北大核心CSCD

[Objective]To simplify the ship modeling process and improve modeling efficiency, this paper proposes a method for rapidly implementing hull model creation based on hull line drawing.[Methods]Using the CATIA platform, this method adopts the component application architecture (CAA) development tool for secondary development. First, by reading the geometry elements and label information of the hull lines in a drawing, the transformation of the offset points from 2D to 3D is realized. On this basis, the creation of the hull lines, stern and bow is completed, and a 3D wireframe model obtained. Finally, the hull 3D modeling is completed in conjunction with the CATIA native surface creation command. The stability and reliability verification of the developed type value extraction and bow generation program is then carried out via application analysis.[Results]The results show that the compiled program can realize the automatic creation of offset points, transverse lines, waterlines, profile lines and other boundary lines except the top line of the wall, and the centerline and tangent lines created by the bow generator are easily modified and simple for users to operate. [Conclusions]The verification results show that the method of a creating hull model using "Generative Shape Design" and "Drafting" with the hull line drawing as the data input is stable, reliable and able to realize rapid hull modeling, giving it certain practical value. © The Author(s) 2022.     

桥梁加固设计及其施工方案解析

本文结合作者施工经验,通过列举工程案例,详细分析了桥梁加固的原因,深度解析了通过采用科学的加固方式,可延长桥梁的使用年限,以增强桥梁的寿命及载重能力.     

造船业如何分享可燃冰盛宴

5月26日，由我国自行研制的综合海洋调查船“海洋六号”在南海北部区域对可燃冰资源进行了深入调查。目前，取样条件已经具备，计划明年开钻。这则消息一出，立刻引起了人们的广泛关注。作为公认的“后石油时代”首选替代能源，可燃冰的储量令人惊讶。如果可燃冰的开采技术和环境保护等问题得以突破，其大规模的商业化将成为现实，并为海工装备业、造船业带来潜在的市场机会。