Research on the Knowledge System Framework of Eco-industrial Engineering

With intensified contradiction between the rapid development of modern industry and the carrying capacity of natural environment,coordinating the relationship between economic benefits and ecological benefits is a significant issue to be solved for modern industrial engineering.This paper firstly conducts the comparative analysis between traditional and ecological industry as well as traditional and modern industrial engineering,and indicates that eco-industrial engineering is an inevitable choice for sustainable development of modern industrial engineering;Then,based on industrial ecology,environmental economics and sustainable development theory,the connotation and definition of ecoindustrial engineering are proposed,and the theoretical and practical development of the concepts of eco-industrial engineering are further investigated.Furthermore,the research subject,research content,academic system architecture and evaluation methods of eco-industrial engineering are discussed.Finally,combining the current scientific and technological development,we put forward the important scientific value and practical significance of constructing eco-industrial engineering for the utilization of these concepts.

Automatic Method for Synchronizing Workpiece Frames in Twin-robot Nondestructive Testing System

The workpiece frames relative to each robot base frame should be known in advance for the proper operation of twin-robot nondestructive testing system. However, when two robots are separated from the workpieces, the twin robots cannot reach the same point to complete the process of workpiece frame positioning. Thus, a new method is proposed to solve the problem of coincidence between workpiece frames. Transformation between two robot base frames is initiated by measuring the coordinate values of three non-collinear calibration points. The relationship between the workpiece frame and that of the slave robot base frame is then determined according to the known transformation of two robot base frames, as well as the relationship between the workpiece frame and that of the master robot base frame. Only one robot is required to actually measure the coordinate values of the calibration points on the workpiece. This requirement is beneficial when one of the robots cannot reach and measure the calibration points. The coordinate values of the calibration points are derived by driving the robot hand to the points and recording the values of top center point(TCP) coordinates. The translation and rotation matrices relate either the two robot base frames or the workpiece and master robot. The coordinated are solved using the measured values of the calibration points according to the Cartesian transformation principle. An optimal method is developed based on exponential mapping of Lie algebra to ensure that the rotation matrix is orthogonal. Experimental results show that this method involves fewer steps, offers significant advantages in terms of operation and time-saving. A method used to synchronize workpiece frames in twin-robot system automatically is presented.

On the Frame Properties of System of Exponents with Piecewise Continuous Phase

A double system of exponents with piecewise continuous complex-valued coefficients are considered. Under definite conditions on the coefficients the frame property of this system in Lebesgue spaces of functions is investigated. Such systems arise in the spectral problems for discontinuous differential operators.

Self-centering seismic retrofit scheme for reinforced concrete frame structures:SDOF system study

This paper presents the results of a parametric study of self-centering seismic retrofit schemes for reinforced concrete (RC) frame buildings. The self-centering retrofit system features flag-shaped hysteresis and minimal residual deformation. For comparison purpose,an alternate seismic retrofit scheme that uses a bilinear-hysteresis retrofit system such as buckling-restrained braces (BRB) is also considered in this paper. The parametric study was carried out in a single-degree-of-freedom (SDOF) system framework since a multi-story building structure may be idealized as an equivalent SDOF system and investigation of the performance of this equivalent SDOF system can provide insight into the seismic response of the multi-story building. A peak-oriented hysteresis model which can consider the strength and stiffness degradation is used to describe the hysteretic behavior of RC structures. The parametric study involves two key parameters -the strength ratio and elastic stiffness ratio between the seismic retrofit system and the original RC frame. An ensemble of 172 earthquake ground motion records scaled to the design basis earthquake in California with a probability of exceedance of 10% in 50 years was constructed for the simulation-based parametric study. The effectiveness of the two seismic retrofit schemes considered in this study is evaluated in terms of peak displacement ratio,peak acceleration ratio,energy dissipation demand ratio and residual displacement ratio between the SDOF systems with and without retrofit. It is found from this parametric study that RC structures retrofitted with the self-centering retrofit scheme (SCRS) can achieve a seismic performance level comparable to the bilinear-hysteresis retrofit scheme (BHRS) in terms of peak displacement and energy dissipation demand ratio while having negligible residual displacement after earthquake.

Construction and Implementation of Expert System for Common Pig Diseases Prevention Based on Struts Framework

The prevention of common pig diseases depends on the experience of veterinarian greatly due to complexity of piggery pestilence. The expert system for the prophylaxis and treatment of common pig diseases is able to make the complex task more effective. The construction and implementation of this expert system is based on the bottleneck problems of the traditional expert system knowledge acquisition and the frame description of symptoms of common pig diseases, used the knowledge project method and technology, and combined the uncertainty inference and dispelling strategy of matching conflict and technology of multimedia. This expert system is used to imitate expert thinking and supplement or substitute for veterinary experts to guide the prophylaxis and treatment of common pig diseases. The overall structure, knowledge expression, inference mechanism and system realization would be expounded emphatically.

THE PRINCIPLES OF LEAST ACTION OF VARIABLE MASS NONHOLONOMIC NONCONSERVATIVE SYSTEM IN NONINERTIAL REFERENCE FRAMES

This paper presents the generalized principles of least action of variable massnonholonomic nonconservative system in noninertial reference frame, proves theequivalence between Holder form and Suslov form, and then obtains differential equationsof motion of variable mass nonholonomic nonconservative system in noninertial referenceframe.

Study of a New Drafting System of Rubbed Roving Frame

This paper puts forward a new drafting system of the rubbed roving frame, which consists of a nine-link gear, two slipping gears. It has brought forward a new design method of the nine-link gear and the slipping gears, and set up approximate formulas for modification coefficients of gears for the first time. And the principles of transmitting rate designing for the system are given. The calculating results demonstrate that the new design method satisfies the demands of processing technology. This mechanism has been used successfully in the kind of rubbed roving frame.

NOETHER’S THEORY FOR NONHOLONOMIC DYNAMICAL SYSTEMS RELATIVE TO NON-INERTIAL REFERENCE FRAME

The new variational principle of Gauss’s form of nonlinear nonholonomicnonpotential system relative to non-inertial reference frame is established byconstructing generalized inertial potentials.Noether’s theorem and Noether’s inversetheorem of the system above is presented and proved.Finally,one example is given toillustrate the application.

露天煤矿安全-绿色-高效-低碳协同开采技术体系

露天煤矿安全绿色高效低碳开采是全球露天煤矿发展的共识性目标。我国露天煤矿资源开发强度与生态承载力呈现逆向发展特征,我国西北部生态环境脆弱区已成为露天煤炭的主产区,使得露天煤矿开采与生态环境保护成为亟需解决的重要科学问题、生态问题和发展问题。基于我国露天煤矿发展概况、自然条件及主要影响因素,阐释了实现露天煤矿安全-绿色-高效-低碳开采内涵特征与总体架构,针对露天煤矿采前-采中-采后全生命开采周期特点,从安全开采技术、绿色开采技术、高效开采技术、低碳开采技术4个层次,归纳总结了时效边坡控制技术、智能预警决策技术、运输环节新模式、矿区生态建设、相邻矿山协调开采、智能采矿设计、电动矿卡应用以及采矿源头生态减损8项关键技术,明确了露天煤矿安全-绿色-高效-低碳协同开采研究重点工作和方向。在安全-绿色-高效-低碳协同发展措施方面,从强化顶层设计、加快分布实施、深化科研攻关、提升人才培养以及完善标准规范5个方面,提出2025年、2030年、2035年不同阶段需要完成的目标任务。新时期露天煤矿要坚定不移走安全-绿色-高效-低碳发展路径,实现露天煤矿在新时期、新格局下的高质量发展目标。

Seismic performance evaluation of steel frame-steel plate shear walls system based on the capacity spectrum method

This paper presents some methods that the standard acceleration design response spectra derived from the present China code for seismic design of buildings are transformed into the seismic demand spectra, and that the base shear force-roof displacement curve of structure is converted to the capacity spectrum of an equivalent single-degree-of-freedom (SDOF) system. The capacity spectrum method (CSM) is programmed by means of MATLAB7.0 computer language. A dual lateral force resisting system of 10-story steel frame-steel plate shear walls (SPSW) is designed according to the corresponding China design codes. The base shear force-roof displacement curve of structure subjected to the monotonic increasing lateral inverse triangular load is obtained by applying the equivalent strip model to stimulate SPSW and by using the finite element analysis software SAP2000 to make Pushover analysis. The seismic performance of this dual system subjected to three different conditions, i.e. the 8-intensity frequently occurred earthquake, fortification earthquake and seldom occurred earthquake, is evaluated by CSM program. The excessive safety of steel frame-SPSW system designed according to the present China design codes is pointed out and a new design method is suggested.

基于FrameBuffer的嵌入式GUI系统设计

本文首先简要介绍了Linux平台下嵌入式GUI的发展状况 ,接着阐述GUI系统的设计思想 ,最后着重介绍了基于Frame

基于FrameBuffer的LCD驱动设计

为开发通用性强、移植性好的液晶驱动程序,对Linux帧缓冲设备驱动程序框架与帧缓冲设备驱动程序层次结构、核心功能模块和数据结构进行了研究。设计了帧缓冲的处理机制,以及底层驱动的接口函数针对具体的LCD面板如何在嵌入式Linux中编写帧缓冲设备的驱动程序。依据TFT-LCD LQ092Y3DG01的逻辑要求和时序要求设计了其驱动电路,实现了S3C2410CPU与Linux下嵌入式GUI图形API的设计。

一种游动傅科机械编排的捷联惯性间接极区导航算法

针对指北方位、游移方位等机械编排的惯性导航系统在极区附近出现计算溢出、导航误差发散、方向基准缺失等问题,本文提出了一种基于游动傅科机械力学编排的捷联惯性间接极区导航算法。首先,推导了传统坐标系和横向坐标系下的游动傅科机械编排位置、速度和姿态转换关系,并设计了完整的捷联惯性极区导航流程。其次,在详细分析载体沿经线穿越极点时的导航解算性能基础上,提出了一种游动傅科机械编排的捷联惯性间接极区导航算法。实验结果表明,该算法能够实现传统导航与横向导航方式的平滑切换,并借助横向导航信息解决载体穿越极点时无法导航的难题。

国家地下水监测工程运行维护预算标准研制思考与探讨

地下水是水资源的重要组成部分,对居民生活、城市建设、环境保护等具有重要意义。地下水监测是一项基础性、公益性、战略性的事业,为国土空间规划、水资源管理和生态环境修复提供有利的科学保障和技术支撑。国家地下水监测工程已运行多年,与之配套的预算标准仍然短缺,亟需开展研制工作。本文从预算标准的研制背景出发,聚焦国家地下水监测工程运行维护阶段各项工作,结合地质行业相关技术规范和工作实际,介绍了运行维护工作内容和工作特点,按照科学性、适用性的预算标准研制原则,确定出预算标准的研制思路和步骤。从框架体系搭建、基础数据采集、预算标准测算三个阶段分析研制过程中的要点,以监测点巡查及校核为例,介绍了国家地下水监测工程运行维护预算标准的测算模式。国家地下水监测工程运行维护预算标准的研制,可以填补此类项目无预算标准的空缺,完善预算标准体系建设,保障国家地下水监测工程网络体系的稳定运行。通过其研究模式和研究过程,以期为中国地质调查局监测类预算标准、观测类预算标准的研制提供借鉴。

中国式现代化系统运行研究论纲

推进中国式现代化是一个系统工程。中国式现代化系统运行蕴含着深刻的内在逻辑,文化根基的深厚滋养是发生前提,战略目标的辩证统一是方向引领,核心要素的稳定运转是现实根基,评估优化的高效实施是可靠保证,系统机制的勾联融通是核心要旨。以内在逻辑为支撑,中国式现代化系统运行具备由文化根基层、目标引领层、核心要素层、评估优化层、系统机制层所构成的立体结构,呈现出开放性、整体性、结构性、稳定性、层次性的鲜明特征,理解中国式现代化系统运行需要把握好顶层设计与实践探索、战略与策略、守正与创新、效率与公平、活力与秩序、自立自强与对外开放等重大关系。中国式现代化系统运行的实践路径包括坚持和加强党的全面领导,构建中国式现代化评估指标体系,提供坚实的学科体系支撑,注重系统运行的风险防范。

大连梭鱼湾专业足球场结构设计综述

大连梭鱼湾专业足球场属于复杂多结构体系,主要由混凝土框架结构、屋顶罩棚索桁架结构、屋盖膜结构,外幕墙钢结构、索结构和膜结构组成。罩棚为索桁架结构,支承于钢压环上,钢压环支承于56根直钢柱上,钢柱柱底、柱顶均铰接,局部设置柱间人字支撑。索桁架内侧设置索拉环,拉环内侧设置钢挑棚。罩棚上弦采用斜交索网,下弦采用径向拉索,上下弦索在平面交点处设置竖向钢撑杆。屋盖膜结构采用张拉膜结构体系。外幕墙采用钢桁架结构,环形坡道之间设置钢索加ETFE膜的幕墙。工程采用结构性能化设计,控制结构变形及承载力,并提出相应设计方案、设计原则、实现建筑效果并保证结构受力合理。

高速精密数控轧辊磨床中心架液压润滑系统的设计及其优化

中心架作为轧辊磨床的重要部分之一,起着支承和卸荷的重要作用。文中以某型高速精密数控轧辊磨床为依据,设计了其中心架的液压润滑系统,基于AMESim软件建立该液压润滑系统模型并进行仿真计算,分析得出侧瓦和底瓦静压固定活塞直径、静压固定活塞杆径及调速阀设定流量对系统中静压腔油压特性具有显著影响。采用遗传算法对影响系统静压腔油压特性的3个参数进行优化,结果表明:优化后的中心架液压润滑系统中,静压腔油压稳定性得到了显著的改善,达到稳定状态的时间明显缩短,验证了优化方案的合理性,其结果可为轧辊磨床液压润滑系统的设计及优化研究提供理论依据。

大直径筒仓仓顶结构施工对比分析

近年来,我国粮食生产连年丰收,粮食安全总体有保障,因此各地粮仓加速建设,以满足粮食储备要求。大直径浅圆仓锥形仓顶模板支撑因其大跨度、超高等施工难度大、危险系数高、难以一次性浇筑实现等诸多问题存在使用局限。以某粮食仓储项目为背景,细致分析大直径筒仓仓顶结构施工的两种空中支撑平台,为今后类似工程项目施工提供参考。

带凹槽剪力墙-混凝土梁节点性能分析

在高层、超高层钢框架-混凝土混合结构核心筒的施工中,滑模、爬模施工工艺得到广泛应用。但在实际工程中,核心筒内部往往采用混凝土次梁,这使得滑模、爬模施工工艺的应用受到限制。针对这一实际问题,提出了带凹槽剪力墙-混凝土梁节点。在对3个不同凹槽尺寸的带凹槽剪力墙-混凝土梁节点进行加载试验的基础上,利用有限元软件ABAQUS模拟3个墙梁节点,将有限元计算结果与试验结果对比。结果表明:带凹槽剪力墙-混凝土梁节点拥有良好的承载能力,且屈服荷载与极限荷载相差较大。凹槽构造可提升节点抗剪能力,且凹槽截面尺寸的大小是带凹槽剪力墙-混凝土梁节点抗剪能力提高的主要原因。

轨道式升降采摘车的控制系统设计

针对果蔬的采摘和运输机械化程度较低的问题,对轨道式升降采摘车的控制系统进行了设计。采摘车的主要组成包括控制系统、液压系统、动力系统、升降系统、采摘系统和行走系统。在升降平台作业时,可能存在升降平台侧翻或者铰架受力过大的问题,为了保证作业安全,对升降平台的底盘和铰架进行了受力分析和尺寸结构设计。为验证该轨道式升降采摘车的性能,对其进行了行走试验和升降试验,结果表明:采摘车通过性良好,且可以满足采摘车对升降高度的精度要求。