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助浸剂对草酸浸出氰化尾渣中赤铁矿效果的影响

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有色金属（冶炼部分） 2024年第1期 21-32页

作者：党晓娥冯磊张婷李林波西安建筑科技大学冶金工程学院西安710055 陕西省黄金与资源重点实验室西安710055

为揭示浸出液中Fe^(3+)的形态分布对焙烧氰化尾渣中赤铁矿浸出效果的影响,研究了H_(2)C_(2)O_(4)、H_(2)C_(2)O_(4)-H_(2)SO_(4)和H_(2)C_(2)O_(4)-K_(2)C_(2)O_(4)对赤铁矿浸出效果的影响,并采用响应面法对H_(2)C_(2)O_(4)-K_(2)C_(2)O_(4)浸出赤铁矿工艺进行了优化。结果表明:Fe^(3+)的形态分布直接影响赤铁矿的浸出效果。H_(2)C_(2)O_(4)与K_(2)C_(2)O_(4)作为除铁剂,n(H_(2)C_(2)O_(4))/n(K_(2)C_(2)O_(4))摩尔比、(C_(2)O_(4)^(2-))_(T)过量倍数及浸出温度影响浸出pH,而pH和c(C_(2)O_(4)^(2-))_(T)应满足浸出的Fe^(3+)转化成Fe(C_(2)O_(4))_(3)^(3-),Fe^(3+)只有以Fe(C_(2)O_(4))_(3)^(3-)形态存在,才能缩短赤铁矿浸出时间、提高赤铁矿浸出效果。H_(2)C_(2)O_(4)-K_(2)C_(2)O_(4)除铁优化条件为:n(H_(2)C_(2)O_(4))/n(K_(2)C_(2)O_(4))=1.03、(C_(2)O_(4)^(2-))_(T)为理论量的1.37倍、浸出温度94℃、液固比L/S=5mL/g、时间30min。在优化条件下,实际值和预测值分别为98.42%和97.73%,相对误差为0.69个百分点。各因素对除铁效果影响大小排序为(C_(2)O_(4)^(2-))_(T)过量倍数、浸出温度、n(H_(2)C_(2)O_(4))/n(K_(2)C_(2)O_(4)),其中n(H_(2)C_(2)O_(4))/n(K_(2)C_(2)O_(4))与浸出温度有一定的交互作用。H_(2)C_(2)O_(4)-K_(2)C_(2)O_(4)浸出焙烧氰化尾渣中赤铁矿结果进一步证明,草酸-草酸盐混合浸出体系是一种高效除铁剂,且浸出液中的铁资源化利用工艺简单,其优势是现有除铁剂无法比拟的。

关键词：焙烧氰化尾渣浸出赤铁矿响应面法(RSM) 优化

脑卒中偏瘫病人功能锻炼依从性现状及影响因素

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护理研究 2024年第8期38卷 1478-1484页

作者：武晋雯李琳波杨辉山西医科大学护理学院山西030001 山西医科大学第一医院

目的:分析脑卒中偏瘫病人功能锻炼依从性的现状及其影响因素。方法:采用一般资料调查表、D型人格量表(DS-14)、家庭功能评定总的功能分量表(FAD-GF)、简易疾病感知问卷(B-IPQ)以及功能锻炼依从性问卷(EAQ)对山西省某三级甲等医院神经内... 详细信息

目的:分析脑卒中偏瘫病人功能锻炼依从性的现状及其影响因素。方法:采用一般资料调查表、D型人格量表(DS-14)、家庭功能评定总的功能分量表(FAD-GF)、简易疾病感知问卷(B-IPQ)以及功能锻炼依从性问卷(EAQ)对山西省某三级甲等医院神经内科234例脑卒中偏瘫病人进行调查。结果:本组脑卒中偏瘫病人DS-14得分为(21.92±9.14)分,B-IPQ得分为(40.86±5.98)分,FAD-GF得分为(26.75±4.88)分,EAQ得分为(34.77±4.36)分;D型人格、疾病感知、家庭功能均与功能锻炼依从性呈负相关。多元线性回归显示,脑卒中偏瘫病人工作状态、偏瘫侧、日常生活能力、D型人格、家庭功能及疾病感知是功能锻炼依从性的影响因素。结论:脑卒中偏瘫病人功能锻炼依从性为中等水平。医护人员在为脑卒中病人提供治疗方案时,可以通过改善病人的疾病感知和家庭功能,从而提高其功能锻炼依从性。

关键词：脑卒中功能锻炼依从性 D型人格家庭功能疾病感知影响因素

草酸-草酸铵浸出氰化尾渣中赤铁矿机理及动力学

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中国冶金 2024年第8期34卷 117-127页

作者：党晓娥李康瑞王碧侠李林波西安建筑科技大学冶金工程学院陕西西安710055 陕西省黄金与资源重点实验室陕西西安710055

焙烧氰化尾渣处置是目前制约黄金冶炼工业可持续发展的瓶颈,为了提高金的回收率和实现尾渣中铁的高附价值利用,在草酸(H_(2)C_(2)O_(4))、草酸-草酸铵(H_(2)C_(2)O_(4)-(NH_(4))2C_(2)O_(4))浸出焙烧氰化尾渣中赤铁矿试验结果的基础上,... 详细信息

焙烧氰化尾渣处置是目前制约黄金冶炼工业可持续发展的瓶颈,为了提高金的回收率和实现尾渣中铁的高附价值利用,在草酸(H_(2)C_(2)O_(4))、草酸-草酸铵(H_(2)C_(2)O_(4)-(NH_(4))2C_(2)O_(4))浸出焙烧氰化尾渣中赤铁矿试验结果的基础上,对H_(2)C_(2)O_(4)-(NH_(4))2C_(2)O_(4)浸出赤铁矿的机理以及浸出动力学进行研究,主要考察浸出温度、H_(2)C_(2)O_(4)与(NH_(4))2C_(2)O_(4)物质的量之比n(H_(2)C_(2)O_(4))/n((NH_(4))2C_(2)O_(4))以及C_(2)O_(4)^(2-)总浓度c(C_(2)O_(4)^(2-))TOT对铁的浸出率的影响。结果表明,适当降低n(H_(2)C_(2)O_(4))/n((NH_(4))2C_(2)O_(4))、提高c(C_(2)O_(4)^(2-))TOT和浸出温度,可提高铁的浸出率,缩短赤铁矿达到浸出平衡的时间。H_(2)C_(2)O_(4)-(NH_(4))2C_(2)O_(4)浸出赤铁矿的反应表观活化能为41.72 kJ/mol,浸出反应受界面化学反应-内扩散混合控制。在n(H_(2)C_(2)O_(4))/n((NH_(4))2C_(2)O_(4))=1和n(C_(2)O_(4)^(2-))TOT/n(Fe^(3+))TOT≥3时,浸出液中的Fe3+全部以Fe(C_(2)O_(4))_(3)3-形式存在,通过对浸出液进行蒸发、浓缩、冷却、结晶,制备出用途较为广泛的(NH_(4))3Fe(C_(2)O_(4))_(3)·3H_(2)O,为氰化尾渣中巨量铁资源的综合利用提供了新途径。研究结果对黄金工业的可持续发展具有重要意义。

关键词：焙烧氰化尾渣赤铁矿草酸-草酸铵浸出动力学

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肿瘤病人非正式照顾者孤独感研究进展

护理研究 2024年第18期38卷 3297-3301页

作者：王艺宝李琳波杨辉山西医科大学护理学院山西030001 山西医科大学第一医院

梳理肿瘤病人非正式照顾者孤独感现状、测量工具、影响因素及干预方法,以期为开展肿瘤病人非正式照顾者孤独感相关研究提供参考。

关键词：肿瘤病人非正式照顾者孤独感护理综述

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我国蚕桑生产机械化研究进展

中国农机化学报 2024年第9期45卷 318-326页

作者：石洪康陈义安祝诗平李林波张剑飞四川省农业科学院蚕业研究所四川南充637000 西南大学工程技术学院重庆市400700

栽桑养蚕是农业体系中重要的组成部分,机械化生产技术及装备成为目前关注的热点。介绍蚕桑产业的发展现状,列举家蚕饲育和制种环节的主要农艺及特点。总结桑园管理、家蚕饲育、蚕茧采收与分选、家蚕制种等方面的机械化研究进展。对蚕桑... 详细信息

栽桑养蚕是农业体系中重要的组成部分,机械化生产技术及装备成为目前关注的热点。介绍蚕桑产业的发展现状,列举家蚕饲育和制种环节的主要农艺及特点。总结桑园管理、家蚕饲育、蚕茧采收与分选、家蚕制种等方面的机械化研究进展。对蚕桑生产机械化发展进行分析,指出目前存在产业链长,需要的机械种类多;农艺复杂,机械研发难度大;家蚕生命周期短,样机试验受限等问题。给出对应的建议,包括开展多功能桑园管理和特有养殖装备研究;注重宜机化研究,推动农机与农艺的深度融合;建立家蚕机械化养殖示范基地,研究蚕桑机械化生产技术等方面。

关键词：蚕桑桑园管理机械养蚕机械工厂化养殖

Highly active CoP-CO_(2)N confined in nanocarbon enabling efficient electrocatalytic immobilizing-conversion of polysulfide targeting high-rate lithium-sulfur batteries

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Journal of Energy Chemistry 2022年第12期75卷 250-259,I0006页

作者： Xiaojun Zhao Tianqi Gao Wenhao Ren Chuan Zhao Zhi-Hong liu linbo li School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055ShaanxiChina School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi’an 710062ShaanxiChina School of Chemistry University of New South WalesSydneyNSW 2052Australia

lithium-sulfur batteries suffer from poor cycling stability because of the intrinsic shuttling effect of intermediate polysulfides and sluggish reaction kinetics,especially at high rates and high sulfur ***,we report the construction of a CoP-CO_(2)N@N-doped carbon polyhedron uniformly anchored on three-dimensional carbon nanotubes/graphene(CoP-CO_(2)N@NC/CG)scaffold as a sulfur reservoir to achieve the trapping-diffusion-conversion of *** active CoP-CO_(2)N shows marvelous catalytic effects by effectively accelerating the reduction of sulfur and the oxidation of li_(2)S during the discharging and charging process,respectively,while the conductive NC/CG network with massive mesoporous channels ensures fast and continuous long-distance electron/ion *** calculations demonstrate that the CoP-CO_(2)N with excellent intrinsic conductivity serves as job-synergistic immobilizing-conversion sites for polysulfides through the formation of P…li/N…li and Co…S *** a result,the S@CoP-CO_(2)N@NC/CG cathode(sulfur content 1.7 mg cm^(-2))exhibits a high capacity of988 mAh g^(-1)at 2 C after 500 cycles,which is superior to most of the electrochemical performance *** under high sulfur content(4.3 mg cm^(-2)),it also shows excellent cyclability with high capacity at 1 C.

关键词： CoP-CO_(2)N@NC/CG Trapping-diffusion-conversion High-rate DFT calculation li-S battery

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椭圆钢包内部流场优化与夹杂物去除分析

中国冶金 2024年第6期34卷 64-73页

作者：李林博陈超王佳陶鑫刘涛赵岩松戎志仁太原理工大学材料科学与工程学院山西太原030024 太原理工大学建筑学院山西太原030024

为了提高某厂实际生产过程中夹杂物的去除效率,以某厂220 t椭圆形钢包为原型,在相似原理的基础上建立了相似比为1∶7的水模型,分析了常规的墨水示踪剂传输过程、盐水示踪剂的混匀、渣眼面积所占比例等过程和参数,并创新地采用粒子图像测... 详细信息

为了提高某厂实际生产过程中夹杂物的去除效率,以某厂220 t椭圆形钢包为原型,在相似原理的基础上建立了相似比为1∶7的水模型,分析了常规的墨水示踪剂传输过程、盐水示踪剂的混匀、渣眼面积所占比例等过程和参数,并创新地采用粒子图像测速(Particle Image Velocimetry,PIV)技术研究了油层存在时水模型中的流速变化。同时进行了工业试验,分析不同方案中夹杂物数量密度的变化规律。综合探究了3种方案钢液的流场、混匀过程以及夹杂物去除情况。研究结果表明,从长轴一侧AB孔进行流量为150 L/min的等流量吹气时(方案1),其示踪剂传输过程与偏心单孔吹气情况类似,即钢液通过靠近表面的强循环流进行混匀,且混匀时间为所有方案最低;而其两孔形成的渣眼发生聚合,渣眼面积为所有方案最大。当中心对称呈180°夹角布置的AC孔以150 L/min等流量吹气时(方案2),靠近表面钢液的水平流动有所减弱,钢包整体流速下降,但渣眼面积所占比例依然较高。对于AC孔分别以50、100 L/min差流量弱吹时(方案3),渣眼面积比例大幅度降低,减弱了钢液的二次氧化。因受表面渣层(油层)影响,靠近表面钢液流动有所增强,有利于夹杂物的去除。利用工业试验对比了方案1和方案3,发现相比方案1,延长方案3的软吹时间可明显减少10μm以上夹杂物数量。综上,钢包内钢液混匀和去除夹杂物的效果并不能兼得,还需深入研究。

关键词：椭圆钢包水模型渣眼粒子图像测速夹杂物去除

Cycle-by-Cycle Queue Length Estimation for Signalized Intersections Using Multi-Source Data

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Journal of Harbin Institute of Technology(New Series) 2015年第2期22卷 86-93页

作者： Zhongyu Wang Qing Cai Bing Wu Yinhai Wang linbo li Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji University Dept. of Civil and Environmental Engineering University of Washington

In order to estimate vehicular queue length at signalized intersections accurately and overcome the shortcomings and restrictions of existing studies especially those based on shockwave theory,a new methodology is presented for estimating vehicular queue length using data from both point detectors and probe vehicles. The methodology applies the shockwave theory to model queue evolution over time and space. Using probe vehicle locations and times as well as point detector measured traffic states,analytical formulations for calculating the maximum and minimum( residual) queue length are developed. The proposed methodology is verified using ground truth data collected from numerical experiments conducted in Shanghai,China. It is found that the methodology has a mean absolute percentage error of 17. 09%,which is reasonably effective in estimating the queue length at traffic signalized intersections. limitations of the proposed models and algorithms are also discussed in the paper.

关键词： queue length estimation multi-source data traffic signals traffic shockwave theory

CA-YOLOv5: Detection model for healthy and diseased silkworms in mixed conditions based on improved YOLOv5

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International Journal of Agricultural and Biological Engineering 2023年第6期16卷 236-245页

作者： Hongkang Shi Wenfu Xiao Shiping Zhu linbo li Jianfei Zhang College of Engineering and Technology Southwest UniversityChongqing 400700China Sericultural Research Institute Sichuan Academy of Agricultural SciencesNanchong 637000SichuanChina Yibin Academy of Southwest University Yibin 644000SichuanChina State Key Laboratory of Resource Insects Southwest UniversityChongqing 400700China

The accurate identification and localization of diseased silkworms is an important task in the research of disease precision control technology and equipment development in the sericulture industry. However, the existing deep learning-based methods for this task are mainly based on image classification, which fails to provide the location information of diseased silkworms. To this end, this study proposed an object detection-based method for identifying and locating healthy and diseased silkworms. Images of mixed healthy and diseased silkworms were collected using a mobile phone, and the category and location of each silkworm were labeled using Labelimg as a labeling tool to construct an image dataset for object detection. Based on the one-step detection model YOLOv5s, the ConvNeXt-Attention-YOLOv5 (CA-YOLOv5) model was designed in which the large kernel with depth-wise separable convolution (7×7 dw-conv) of ConvNeXt was adopted to expand receptive fields and the channel attention mechanism ECANet was added to enhance the capability of feature extraction. Experiments showed that the mean average precision (mAP) values of CA-YOLOv5 for healthy and diseased silkworms reached 96.46%, which is 1.35% better than that achieved via YOLOv5s. At the same time, the overall performance of CA-YOLOv5 was significantly better than state-of-the-art one-step models, such as Single Shot MultiBox Detector (SSD), CenterNet, and EfficientDet, and even improved YOLOv5 using image attention mechanism and a lightweight backbone, like SENet-YOLOv5 and MobileNet-YOLOv5. The results of this study can provide an important basis for the accurate positioning of diseased silkworms in precision disease control technology and equipment development.

关键词： diseased silkworm detection YOLOv5 mixed conditions image attention mechanism object detection