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Improvements on Calculation Model of Theoretical Combustion Temperature in a Blast Furnace

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Journal of Iron and Steel Research International 2011年第12期18卷 1-5页

作者： WU Sheng-li LIU Cheng-song FU Chang-liang XU jian kou ming-yin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

On the basis of the existing originally modified calculation models of theoretical combustion temperature（TCT）,some factors,such as the combustion ratio of pulverized coal injection（PCI）,the decomposition heat of PCI and the heat consumption of SiO2 in ash reduced in high temperature environment,were amended and improved to put forward a more comprehensive model for calculating *** influences of each improvement on TCT were studied and the results were analyzed compared with those of traditional model and originally modified model,which showed that the present model could reflect the thermal state of a hearth more effectively.

关键词： blast furnace theoretical combustion temperature improved calculation model

Coke Collapse Model and Collapse Profile Variation Law for Bell-Less Top BF

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Journal of Iron and Steel Research International 2011年第10期18卷 8-12页

作者： WU Sheng-li FU Chang-liang LIU Cheng-song XU jian kou ming-yin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The mathematical model of minimum safety factor that investigated the collapse trends of coke layer under different charging parameters was established firstly on the basis of the slope stabilization theory in soil mechanics, and then the model of burden profile after coke collapse was improved by adopting the predetermination of quadratic curve and energy correction methods. The research will provide theoretical evidences for describing the coke profile more accurately and technical direction for choosing suitable charging parameters of blast furnace. The results show that： it is helpful to improve the stability of coke layer with increasing chute inclining angle and length of the coke flat; when the main falling point of ore moves toward furnace wall or the coke flat is wider, the curve radian of burden profile after coke collapse becomes smaller; the ore to coke ratio distribution agrees with the gas top temperature measurement well under considering coke collapse comparing with the result of ignoring coke collapse.

关键词： blast furnace coke layer stability safety factor coke collapse burden profile

Clinical observations of osteoporotic vertebral compression fractures by using mineralized collagen modified polymethylmethacrylate bone cement

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Regenerative Biomaterials 2017年第2期4卷 105-109页

作者： XiWang jian-ming kou Yang Yue An-Ze Shao Xue-Jun Jia jian-Wen Hou Chong Gao Zhi-Ye Qiu Xiu-Mei Wang Xi-Sheng Weng Department of Orthopedics The Second People’s Hospital of LianyungangNo.41 Hailian East RoadHaizhou DistrictLianyungang 222000China Institute for Regenerative Medicine and Biomimetic Materials Tsinghua UniversityHaidian DistrictBeijing 100084China Department of Orthopaedics Peking Union Medical College HospitalNo.1 ShuaifuyuanDongcheng DistrictBeijing 100730China

To investigate the clinical outcomes of the treatment of osteoporotic vertebral compression fractures(OVCFs)by using mineralized collagen(MC)modified polymethylmethacrylate(PMMA)bone cement.52 cases(52 vertebras)who sustained OVCF treated with MC modified PMMA bone cement from July 2014 to December 2015 were reviewed *** the cases(52 patients,52 vertebras)included 8 males and 44 females with an average age of 74.83(ranging from 57-to 90-years old).The visual analogue scale(VAS),vertebral body height,Cobb angle,CT values preand post-operation as well as incidence of complications were used to be *** the patients underwent the surgery were successfully followed-up with an average period of 13.54 months(ranging from 6 to 23 months).The patients can ambulate at the second day after the *** VAS scores 2 days after the operation and during the last follow-up were significantly decreased compared with that before the operation(P<0.05);the average vertebral height and local Cobb angle had significant recovery(P<0.05);the CT value of the treated vertebra significantly increased compared with that before the operation(P<0.05).MC with good osteogenic activity and degradation properties can effectively improve the mechanical properties and biocompatibility of the PMMA bone cement,thus obtain better clinical results.

关键词： mineralized collagen PMMA bone cement osteoporosis vertebral compression fractures

Unlocking the future:Mitochondrial genes and neural networks in predicting ovarian cancer prognosis and immunotherapy response

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World Journal of Clinical Oncology 2025年第1期16卷 43-52页

作者： Zhi-jian Tang Yuan-ming Pan Wei Li Rui-Qiong Ma jian-Liu Wang Department of Obstetrics and Gynecology Peking University People’s HospitalBeijing 100044China Cancer Research Center Beijing Chest HospitalBeijing 101149China Department of Thoracic Surgery Sichuan Provincial People's HospitalChengdu 610072Sichuan ProvinceChina

BACKGROUND Mitochondrial genes are involved in tumor metabolism in ovarian cancer(OC)and affect immune cell infiltration and treatment *** To predict prognosis and immunotherapy response in patients diagnosed with OC using mitochondrial genes and neural *** Prognosis,immunotherapy efficacy,and next-generation sequencing data of patients with OC were downloaded from The Cancer Genome Atlas and Gene Expression *** genes were sourced from the MitoCarta3.0 *** discovery cohort for model construction was created from 70% of the patients,whereas the remaining 30% constituted the validation *** the expression of mitochondrial genes as the predictor variable and based on neural network algorithm,the overall survival time and immunotherapy efficacy(complete or partial response)of patients were *** In total,375 patients with OC were included to construct the prognostic model,and 26 patients were included to construct the immune efficacy *** average area under the receiver operating characteristic curve of the prognostic model was 0.7268[95% confidence interval(CI):0.7258-0.7278]in the discovery cohort and 0.6475(95%CI:0.6466-0.6484)in the validation *** average area under the receiver operating characteristic curve of the immunotherapy efficacy model was 0.9444(95%CI:0.8333-1.0000)in the discovery cohort and 0.9167(95%CI:0.6667-1.0000)in the validation *** The application of mitochondrial genes and neural networks has the potential to predict prognosis and immunotherapy response in patients with OC,providing valuable insights into personalized treatment strategies.

关键词： Ovarian cancer Mitochondria Prognosis Immunotherapy Neural network

A practical iterative two-view metric reconstruction with uncalibrated cameras

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第10期8卷 1614-1623页

作者： ZHOU Yong-jun kou Xin-jian School of Naval Architecture. Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

This paper presents a practical iterative algorithm for two-view metric reconstruction without any prior knowledge about the scene and motion in a nonsingular geometry configuration. The principal point is assumed to locate at the image center with zero skew and the same aspect ratio, and the interior parameters are fixed, so the self-calibration becomes focal-length cali- bration. Existing focal length calibration methods are direct solutions of a quadric composed of fundamental matrix, which are sensitive to noise. A quaternion-based linear iterative Least-Square Method is proposed in this paper, and one-dimensional searching for optimal focal length in a constrained region instead of solving optimization problems with inequality constraints is applied to simplify the computation complexity, then unique rotational matrix and translate vector are recovered. Experiments with simulation data and real images are given to verify the algorithm.

关键词： Close-range photogrammetry Computer vision General relative orientation Unit quaternion Metric reconstruction

DAO媒介:驱动未来社会算法化与自组织的元媒介

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 132-141页

作者：喻国明苏健威北京师范大学新闻传播学院北京师范大学传播创新与未来媒体实验平台北京100875

DAO媒介是以区块链算法等技术为基础,支持数字社群协同自治的媒介,具有区块链、智能合约与投票等功能特性和要素确权、技术信任、规则构架以及场景聚合等价值禀赋。对于数字生态显露的各种问题,“算法化”是重构数字生态、降解社会系统... 详细信息

DAO媒介是以区块链算法等技术为基础,支持数字社群协同自治的媒介,具有区块链、智能合约与投票等功能特性和要素确权、技术信任、规则构架以及场景聚合等价值禀赋。对于数字生态显露的各种问题,“算法化”是重构数字生态、降解社会系统复杂性的关键机制,DAO媒介是支撑“自组织式”算法化的元媒介。DAO媒介与数字文明时代喷发的微粒个体、微资源、微价值、微需求、微场景等相匹配,能够深度匹配人的个性与自我,形成有效的趣缘连接,进而极大地释放数字文明的生产力。DAO媒介将深刻影响社会系统的构造,将微粒个体与相关社会要素“包裹”为闭环子系统,支持其准开放的系统边界、有效的异质性整合、可持续的规则重构、子系统与父级系统的持续分化和快速进化,等等。在数字文明时代,DAO媒介将使“重新部落化”的“地球村”变为现实,其驱动构筑的DAO社会将更加多元、更加富有创造力,不断拓展人类群体实践的自由度,使人类在高度异质性聚合基础上更加和谐有序地整合协同。

关键词： DAO 数字媒介算法自组织社会系统

Optimization of iron ore blending based on replacing Australian low alumina limonite

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Journal of Iron and Steel Research International 2023年第9期30卷 1675-1686页

作者： Bin Li Heng Zhou jian Huang Zong-wang Zhang Xue-feng She jian-fang Wang Sheng-li Wu ming-yin kou State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Shougang Jingtang Iron and Steel Co. Ltd.Tangshan 063200HebeiChina Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology BeijingBeijing 100083China Delong Iron and Steel Co. Ltd.Xingtai 054009HebeiChina

Mauritanian iron ore powder(OM)has advantages of high iron grade,low aluminum content,and low loss on ignition,which can be used as a new mineral to replace low alumina limonite that has been exhausted in ***,it will have a certain negative impact on sintering because of its high SiO_(2) *** mechanism of SiO_(2) content affecting the sintering behavior was first studied through FactSage ***,the liquid fluidity,penetration,and high-temperature performance of different iron ore powders were ***,the optimization of ore blending structure was studied by the micro-sintering method and the sinter pot *** results show that the increase in SiO_(2) content can reduce the assimilation *** low penetration of OM can lead to an increase in the amount of liquid,and the high SiO_(2) content of OM increases the viscosity of the liquid *** is more,the increase in SiO_(2) also increases the formation of silicate and fayalite phase and inhibits the formation of silico-ferrite of calcium and aluminum(SFCA).To optimize ore blending structure,OM and the low SiO_(2) powder OD from Australia were used together,which improves the content of SFCA by 2.04%and decreases the contents of calcium silicate and fayalite by 0.63%and 4.99%,*** results of the sinter pot test indicated that the properties of sinter have been improved.

关键词： Mauritanian iron ore powder Liquid fluidity Penetration Mineral composition Sintering Ore blending Low alumina limonite

Internal force and deformation matrixes and their applications in load path

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第8期11卷 563-570页

作者： Qi CHEN Xin-jian kou Yan-meng ZHANG Department of Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

This paper deals with the internal force and the deformation matrixes, both of which can be used to analyze the topological relationship of a structure. Based on the reciprocal theorem, the relationship between the two matrixes is established, which greatly simplifies the computation of the internal force matrix. According to the characteristics of the internal force matrix, the transfer law of the matrix itself (due to the removal of components) is established based on the principle of linear superposition. With the relation of the two matrixes, the transfer law of the deformation matrix is also obtained. The transfer law illuminates the change regularity of internal force or deformation of the remnant structure when certain members are cut off one after another. The results of numerical examples show that the proposed methods are correct, reliable and effective.

关键词： Truss structure Redundancy Robustness Topological relationship of structure Removal of members Transfer law

Practical Green’s function for the thermal stress field induced by a heat source in plane thermoelasticity

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Applied Mathematics and Mechanics(English Edition) 2020年第4期41卷 543-550页

作者： jian HUA ming DAI State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The classical Green’s functions used in the literature for a heat source in a homogeneous elastic medium cannot lead to ?nite remote thermal stresses in the medium,so that they may not work well in practical thermal stress analyses. In this paper, we develop a practical Green’s function for a heat source disposed eccentrically into an elastic disk/cylinder subject to plane deformation. The edge of the disk/cylinder is assumed to be thermally permeable and traction-free. The full thermal stress ?eld induced by the heat source in the disk/cylinder is determined exactly and explicitly via the Cauchy integral techniques. In particular, a very simple formula is obtained to describe the hoop thermal stress on the edge of the disk/cylinder, which may be conveniently useful for analyzing the thermal stresses in microelectronic components.

关键词： heat source Green’s function thermal stress finite matrix