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Multi-objective quality control method for cold-rolled products oriented to customized requirements

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1332-1342页

作者： Yi-fan Yan zhi-min lü Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

To deal with the increasing demand for low-volume customization of the mechanical properties of cold-rolled products, a two-way control method based on mechanical property prediction and process parameter optimization(PPO) has become an effective solution. Aiming at the multi-objective quality control problem of a company's cold-rolled products, based on industrial production data, we proposed a process parameter design and optimization method that combined multi-objective quality prediction and PPO. This method used the multi-output support vector regression(MSVR) method to simultaneously predict multiple quality indices. The MSVR prediction model was used as the effect verification model of the PPO results. It performed multi-process parameter collaborative design and realized the optimization of production process parameters for customized multi-objective quality requirements. The experimental results showed that, compared with the traditional single-objective quality prediction model based on support vector regression(SVR), the multi-objective prediction model could better take into account the coupling effect between process parameters and quality index, the MSVR model prediction accuracy was higher than that of the SVR, and the optimized process parameters were more capable and reflected the influence of metallurgical mechanism on the quality index,which were more in line with actual production process requirements.

关键词： customized production quality control multi-objective prediction multi-output support vector regression process parameter optimization

Betti Numbers of locally Standard 2-Torus Manifolds

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Chinese Annals of Mathematics,Series B 2014年第4期35卷 599-606页

作者： Junda CHEN zhi lü School of Mathematical Sciences Fudan University School of Mathematical Sciences and the Key laboratory of Mathematics for Nonlinear Sciences of Ministry of Education Fudan University

let Mn be a smooth closed n-manifold with a locally standard （Z2）n-action. This paper deals with the relationship among the rood 2 Betti numbers of Mn, the mod 2 Betti numbers and the h-vector of the orbit space of ... 详细信息

关键词： locally standard 2-torus action Manifold with corners Betti number

基于“分类-调度”优化的应急物资动态调度-重调度算法

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科学技术与工程 2024年第24期24卷 10356-10361页

作者：倪超胡钟骏霍忻吕志悦李婧中国航空综合技术研究所北京100028 国家市场监管总局重点实验室(质量基础设施效能研究) 北京100028

由于灾情的不确定性和信息延迟,应急救灾物资配送与车辆调度常面临配送过程中出现需求点信息动态变化的复杂环境,如何在动态变化的环境下快速反应,准确高效地实现应急物资重调度显得尤其重要。针对需求点信息动态变化的复杂环境,建立一... 详细信息

由于灾情的不确定性和信息延迟,应急救灾物资配送与车辆调度常面临配送过程中出现需求点信息动态变化的复杂环境,如何在动态变化的环境下快速反应,准确高效地实现应急物资重调度显得尤其重要。针对需求点信息动态变化的复杂环境,建立一个应急物资动态调度模型,并提出基于“分类-调度”的动态调度算法,通过k-means分类将原复杂问题降解为多个简单TSP问题,随着需求点信息的变化可动态调整分类,以实现快速重调度;设计相应的路线调整策略以保证方案的可行性;最后利用遗传算法求解。数值试验结果证明了所提方法的有效性。

关键词：应急物流动态车辆路径调度 k-means分类遗传算法

Zr/EMs(DAP-4、AP、Cl-20、HMX)的热分解及燃烧性能

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火炸药学报 2024年第7期47卷 623-631,I0003页

作者：胡立双梁凯丽刘洋孙磊吕智星胡双启中北大学环境与安全工程学院山西太原030051 山西江阳兴安民爆器材有限公司山西太原030041 中国兵器工业火炸药工程与安全技术研究院北京100053

为了探索金属锆粉(Zr)与高能氧化剂复合体系的热分解以及燃烧性能,以4种含能材料(EMs)AP、Cl-20、HMX、DAP-4及其Zr/EMs样品为主体,采用差示扫描量热分析、全自动量热法和自主搭建的燃烧实验系统,对样品的热分解行为、燃烧热及点火燃烧... 详细信息

为了探索金属锆粉(Zr)与高能氧化剂复合体系的热分解以及燃烧性能,以4种含能材料(EMs)AP、Cl-20、HMX、DAP-4及其Zr/EMs样品为主体,采用差示扫描量热分析、全自动量热法和自主搭建的燃烧实验系统,对样品的热分解行为、燃烧热及点火燃烧过程进行对比分析,收集部分燃烧产物进行表征;分析了Zr/DAP-4的燃烧机理。结果表明,DAP-4的耐热性能、燃烧热释放等均优于其他EMs样品;添加Zr后样品的燃烧热更高,E a更低且热分解温度保持在373.8℃,燃烧性能优于纯DAP-4。相比于Zr/Cl-20和Zr/HMX的热分解,Zr/DAP-4的起始分解温度和峰温更高,表观活化能E a更低,仅为138.7 kJ/mol,燃烧热高达17134 J/g。从燃烧动态可知,Zr/DAP-4的全过程燃烧仅需要170 ms,反应迅速且剧烈,其火焰强度优于其他3种样品。燃烧产物分析表明,Zr/DAP-4燃烧生成了ZrO 2等固体和H 2O、HCl等气体产物。综合分析,Zr/DAP-4具有更高的能量特性和更好的燃烧性能,在未来推进剂配方设计中有很大的应用潜能。

关键词：物理化学 DAP-4 锆粉热分解燃烧性能释能高能氧化剂

Kinetics of carbonated decomposition of hydrogarnet with different silica saturation coefficients

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International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 472-482页

作者： Xiao-feng Zhu Ting-an Zhang Guo-zhi lü State Key laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Key laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education Northeastern UniversityShenyang 110819China Special Metallurgy and Process Engineering Institute School of MetallurgyNortheastern UniversityShenyang 110819China

Carbonated decomposition of hydrogarnet is one of the vital reactions of the calcification–carbonation method,which is designed to dispose of low-grade bauxite and Bayer red mud and is a novel eco-friendly *** this study,the effect of the silica saturation coefficient(x)on the carbonation of hydrogarnet was investigated from the kinetic *** results indicated that the carbonation of hydrogarnets with different x values(x=0.27,0.36,0.70,and 0.73)underwent two stages with significantly different rates,and the kinetic mechanisms of the two stages can be described by the kinetic functions R3 and *** apparent activation energies at Stages 1 and 2 were 41.96–81.64 and 14.80–34.84 kJ/mol,***,the corresponding limiting steps of the two stages were interfacial chemical reaction and diffusion.

关键词： Bayer red mud hydrogarnet calcification carbonation kinetics silica saturation coefficient

Fundamental Groups of Real Toric Spaces over Simple Polytopes

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1887-1900页

作者： zhi lU Song ZHANG School of Mathematical Sciences Fudan UniversityShanghai 200433P.R.China

In this paper we study the cubical stuctures and fundamental groups of real toric *** give an explicit presentation of the fundamental group of the real toric space over a simple *** using this presentation,we give a ... 详细信息

关键词： Real toric space fundamental group simple polytope real Buchstaber invariant

Crossing-changeable braids from chromatic configuration spaces

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Science China Mathematics 2021年第9期64卷 2077-2090页

作者： Hao li zhi lv School of Mathematical Sciences Fudan UniversityShanghai200433China

Motivated by the work in li et al.(2019),this paper deals with the theory of the braids from chromatic configuration *** kinds of braids possess the property that some strings of each braid may intersect together and can also be untangled,so they are quite different from the ordinary braids in the sense of Artin(1925).This enriches and extends the theory of ordinary braids.

关键词： crossing-changeable braid chromatic configuration space extended fundamental group

A Theory of Orbit Braids

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Chinese Annals of Mathematics,Series B 2023年第2期44卷 165-192页

作者： Fengling lI Hao lI zhi lü School of Mathematical Sciences Dalian University of TechnologyDalian 116024China School of Mathematical Sciences Fudan UniversityShanghai 200433China

In this paper,the authors systematically discuss orbit braids in M×I with regards to orbit configuration space FG(M,n),where M is a connected topological manifold of dimension at least 2 with an effective action of a finite group *** orbit braids form a group,named orbit braid group,which enriches the theory of ordinary *** authors analyze the substantial relations among various braid groups associated to those configuration spaces FG(M,n),F(M/G,n)and F(M,n).They also consider the presentations of orbit braid groups in terms of orbit braids as generators by choosing M=C with typical actions of Zpand(Z_(2))^(2).

关键词： Orbit braid Orbit configuration space

Orbit configuration spaces of small covers and quasi-toric manifolds

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Science China Mathematics 2021年第1期64卷 167-196页

作者： Junda Chen zhi lü Jie Wu School of Mathematical Sciences Fudan UniversityShanghai200433China Department of Mathematics National University of SingaporeSingapore119260Republic of Singapore

In this article,we investigate the orbit configuration spaces of some equivariant closed manifolds over simple convex polytopes in toric topology,such as small covers,quasi-toric manifolds and(real)moment-angle manifolds;especially for the cases of small covers and quasi-toric *** kinds of orbit configuration spaces have non-free group actions,and they are all noncompact,but still built via simple convex *** obtain an explicit formula of the Euler characteristic for orbit configuration spaces of small covers and quasi-toric manifolds in terms of the h-vector of a simple convex *** a by-product of our method,we also obtain a formula of the Euler characteristic for the classical configuration space,which generalizes the Félix-Thomas *** addition,we also study the homotopy type of such orbit configuration *** particular,we determine an equivariant strong deformation retraction of the orbit configuration space of 2 distinct orbit-points in a small cover or a quasi-toric manifold,which allows to further study the algebraic topology of such an orbit configuration space by using the Mayer-Vietoris spectral sequence.

关键词： orbit configuration space small cover quasi-toric manifold (real)moment-angle manifold Euler characteristic homotopy type