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EFFECTS OF THE TAILINGS POSITION IN TAILINGS POND ON THE STRENGTH OF FILL

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中国有色金属学会会刊：英文版 1995年第3期5卷 13-15页

作者： qinli, zhang Xucheng, Peng Xinmin, Wang Niankai, Ouyang Central South Univ of Technology Changsha China

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关键词： tailings position tailings pond strength of the fill

COST REDUCTION OF CEMENTING FILL IN KANGJIAWAN MINE

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中国有色金属学会会刊：英文版 1997年第1期7卷 6-8页

作者： Wang, Xinmin zhang, qinli Chen, Changmin Li, Yanping Central South Univ of Technology Changsha China

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关键词： fill cost cement consumption continuous filling time cementing rockfill

Attribute Reduction of Hybrid Decision Information Systems Based on Fuzzy Conditional Information Entropy

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Computers, Materials & Continua 2024年第5期79卷 2063-2083页

作者： Xiaoqin Ma Jun Wang Wenchang Yu qinli zhang School of Big Data and Artificial Intelligence Chizhou UniversityChizhou247000China Anhui Education Big Data Intelligent Perception and Application Engineering Research Center Chizhou247000China

The presence of numerous uncertainties in hybrid decision information systems(HDISs)renders attribute reduction a formidable *** available attribute reduction algorithms,including those based on Pawlak attribute importance,Skowron discernibility matrix,and information entropy,struggle to effectively manages multiple uncertainties simultaneously in HDISs like the precise measurement of disparities between nominal attribute values,and attributes with fuzzy boundaries and abnormal *** order to address the aforementioned issues,this paper delves into the study of attribute reduction *** of all,a novel metric based on the decision attribute is introduced to solve the problem of accurately measuring the differences between nominal attribute *** newly introduced distance metric has been christened the supervised distance that can effectively quantify the differences between the nominal attribute ***,based on the newly developed metric,a novel fuzzy relationship is defined from the perspective of“feedback on parity of attribute values to attribute sets”.This new fuzzy relationship serves as a valuable tool in addressing the challenges posed by abnormal attribute ***,leveraging the newly introduced fuzzy relationship,the fuzzy conditional information entropy is defined as a solution to the challenges posed by fuzzy *** effectively quantifies the uncertainty associated with fuzzy attribute values,thereby providing a robust framework for handling fuzzy information in hybrid information ***,an algorithm for attribute reduction utilizing the fuzzy conditional information entropy is *** experimental results on 12 datasets show that the average reduction rate of our algorithm reaches 84.04%,and the classification accuracy is improved by 3.91%compared to the original dataset,and by an average of 11.25%compared to the other 9 state-of-the-art reduction *** comprehensive analysis o

关键词： Hybrid decision information systems fuzzy conditional information entropy attribute reduction fuzzy relationship rough set theory(RST)

Rheological and physicomechanical properties of rod milling sand-based cemented paste backfill modified by sulfonated naphthalene formaldehyde condensate

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维普期刊数据库

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International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 225-235页

作者： qinli zhang Hao Wu Yan Feng Daolin Wang Huaibin Su Xiaoshuang Li School of Resource and Safety Engineering Central South UniversityChangsha 410083China School of Civil Engineering Shaoxing UniversityShaoxing 312000China

Rod milling sand(RMS)—a coarse sand aggregate—was recycled for cemented paste backfill(CPB)for the underground mined area at the Jinchuan nickel deposit,named rod milling sand-based cemented paste backfill(RCPB).The adverse effects of coarse particles on the transportation of CPB slurry through pipelines to underground stopes resulting in weakening of the stability of the backfill system are well ***,sulfonated naphthalene formaldehyde(SNF)condensate was used for the performance improvement of *** synergistic effect of solid content(SC),lime-to-sand ratio,and SNF dosage on the rheological and physicomechanical properties,including slump,yield stress,bleeding rate,uniaxial compressive strength(UCS),as well as mechanism analysis of RCPB,have been *** results indicate that the effect of SNF on RCPB performance is related to the SNF dosage,lime-to-sand ratio,and *** slump of fresh RCPB with 0.1wt%-0.5wt%SNF increased by 2.6%-26.2%,whereas the yield stress reduced by 4.1%-50.3%,indicating better workability and improved cohesiveness of the *** bleeding rate of fresh RCPB decreased first and then rose with the increase of SNF dosage,and the peak decrease was 67.67%.UCS of RCPB first increased and then decreased with the increase of SNF *** the optimal SNF addition ratio of 0.3wt%,the UCS of RCPB curing for 7,14 and,28 d ages increased by 31.5%,28.4%,and 29.5%,*** beneficial effects of SNF in enhancing the early UCS of RCPB have been ***,the later UCS increases at a slower *** research findings may guide the design and preparation of RCPB with adequate performance for practical applications.

关键词： rod milling sand sulfonated naphthalene formaldehyde condensate cemented paste backfill rheological properties physicomechanical properties

Erosion wear at the bend of pipe during tailings slurry transportation:Numerical study considering inlet velocity,particle size and bend angle

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International Journal of Minerals,Metallurgy and Materials 2023年第8期30卷 1608-1620页

作者： Qiusong Chen Hailong Zhou Yunmin Wang Daolin Wang qinli zhang Yikai Liu School of Resources and Safety Engineering Central South UniversityChangsha 410083China Sinosteel Maanshan General Institute of Mining Research Co. Ltd.Maanshan 243000China Department of Geosciences University of Padova35131 PadovaItaly

Pipeline hydraulic transport is a highly efficient and low energy-consumption method for transporting solids and is commonly used for tailing slurry transport in the mining *** wear(EW)remains the main cause of failure in tailings slurry pipeline systems,particularly at *** is a complex phenomenon influenced by numerous factors,but research in this area has been *** study performs numerical simulations of slurry transport at the bend by combining computational fluid dynamics and fluid particle tracking using a wear *** on the validation of the feasibility of the model,this work focuses on the effects of coupled inlet velocity(IV)ranging from 1.5 to 3.0 m·s^(-1),particle size(PS)ranging from 50 to 650μm,and bend angle(BA)ranging from 45°to 90°on EW at the bend in terms of particle kinetic energy and incidence *** results show that the maximum EW rate of the slurry at the bend increases exponentially with IV and PS and first increases and then decreases with the increase in BA with the inflection point at 60°within these parameter *** comprehensive analysis reveals that the sensitivity level of the three factors to the maximum EW rate is PS>IV>BA,and when IV is 3.0 m/s,PS is 650μm,and BA is 60°,the bend EW is the most severe,and the maximum EW rate is 5.68×10^(-6)kg·m^(-2)·s^(-1).In addition,When PS is below or equal to 450μm,the maximum EW position is mainly at the outlet of the *** PS is greater than 450μm,the maximum EW position shifts toward the center of the bend with the increase in ***,EW at the bend can be reduced in practice by reducing IV as much as possible and using small particles.

关键词： tailings transportation erosion wear pipe wear CFD numerical simulation

基于Epanechnikov混合模型的中心化模糊模型

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计算机研究与发展 2010年第5期47卷 940-947页

作者：张钦礼王士同北华航天工业学院基础科学部河北廊坊065000 江南大学信息工程学院江苏无锡214122

基于Epanechnikov混合模型提出了一种新的模糊模型——具有多维隶属度函数的规则中心化模糊模型.它容易设计:任何一个Epanechnikov混合模型都唯一对应着一个规则中心化的模糊模型,Epanechnikov混合模型的条件期望输出是规则中心化的模... 详细信息

基于Epanechnikov混合模型提出了一种新的模糊模型——具有多维隶属度函数的规则中心化模糊模型.它容易设计:任何一个Epanechnikov混合模型都唯一对应着一个规则中心化的模糊模型,Epanechnikov混合模型的条件期望输出是规则中心化的模糊模型的去模糊化输出;它具有高度的可解释性:其规则后件恰好是其输出在规则中心的一阶Taylor级数展开;它采用了多维隶属度函数,考虑了输入数据各个分量之间的相关性,更符合实际问题.对两个典型实例的仿真实验表明,由Epanechnikov混合模型设计的规则中心化的模糊模型比其他模糊模型速度快、精度高、鲁棒性好.

关键词： Epanechnikov混合模型(EMM) 规则中心化的模糊模型多维隶属度函数期望最大化算法高斯混合模型

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基于L管试验的似膏体管流水力坡度模型

中国矿业大学学报 2019年第1期48卷 23-28页

作者：卞继伟张钦礼王浩中南大学资源与安全工程学院湖南长沙410083

基于Bingham流变模型和非牛顿流体力学理论,借助L管试验研究了料浆质量分数、砂灰质量比、粉煤灰质量分数对似膏体流变参数的影响,推导了似膏体充填料浆流变参数与料浆质量分数、砂灰质量比、粉煤灰质量分数的回归方程,进而构建出全尾... 详细信息

基于Bingham流变模型和非牛顿流体力学理论,借助L管试验研究了料浆质量分数、砂灰质量比、粉煤灰质量分数对似膏体流变参数的影响,推导了似膏体充填料浆流变参数与料浆质量分数、砂灰质量比、粉煤灰质量分数的回归方程,进而构建出全尾砂似膏体管道输送水力坡度的计算模型.结果表明:似膏体管道输送水力坡度与料浆质量分数成正相关,与砂灰质量比、粉煤灰质量分数呈负相关;环管试验验证了该水力坡度计算模型平均误差为3.30%.

关键词： L管试验似膏体水力坡度

RNA干扰在神经退行性疾病发病机制研究和治疗方面的进展

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卫生研究 2009年第3期38卷 380-384页

作者：张勤丽牛侨山西医科大学公共卫生学院劳动卫生教研室太原030001

神经退行性疾病是一类适用于RNA干扰疗法的疾病,其发病机制的复杂性又使RNA干扰成为探讨其发病机制的有效工具。本文针对RNA干扰在神经退行性疾病发病机制研究和治疗方面的应用进展进行了综述。通过小RNA干扰技术,在神经退行性疾病的模... 详细信息

神经退行性疾病是一类适用于RNA干扰疗法的疾病,其发病机制的复杂性又使RNA干扰成为探讨其发病机制的有效工具。本文针对RNA干扰在神经退行性疾病发病机制研究和治疗方面的应用进展进行了综述。通过小RNA干扰技术,在神经退行性疾病的模式动物中找到一批RNA的基因,创建模式动物中RNA组数据库,发现或/和揭示与一些重要生命现象和神经退行性疾病相关的RNA,建立一些以RNA为靶标的预防和治疗技术。

关键词： RNA干扰神经退行性疾病

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基于BP网络的某矿山充填料浆配比优化

中南大学学报（自然科学版） 2013年第7期44卷 2867-2874页

作者：张钦礼李谢平杨伟中南大学资源与安全工程学院湖南长沙410083

针对目前某矿山残矿回采充填体质量所存在的问题,提出采用分级尾砂胶结充填的方案。分析分级尾砂的物化特性,得出分级尾砂作为充填骨料的可行性。通过配比试验,初步确定影响料浆质量的因素。为了得到最优配比,采用神经网络进行优化,以... 详细信息

针对目前某矿山残矿回采充填体质量所存在的问题,提出采用分级尾砂胶结充填的方案。分析分级尾砂的物化特性,得出分级尾砂作为充填骨料的可行性。通过配比试验,初步确定影响料浆质量的因素。为了得到最优配比,采用神经网络进行优化,以料浆浓度及各组分添加量作为输入因子,塌落度、7 d抗压强度及28 d抗压强度作为输出因子,并以配比实验数据为训练和检验样本来建立BP神经网络预测模型。对比隐含层节点数对模型训练过程及预测精度的影响,选取最佳预测模型结构为4 9 3。将配比参数细化输入到预测模型中,从而搜索出优选样本,得到最优配比为m(水泥):m(粉煤灰):m(尾砂)=1:3:8。优化结果表明:在保证强度的前提下,粉煤灰的添加可有效地降低充填成本,经济效益显著。

关键词：胶结充填物化分析料浆配比 BP神经网络优化选择