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硫酸铵焙烧法选择性分离锌浸出渣中的锌和铁

中国有色金属学报 2021年第7期31卷 1944-1951页

作者：张杜超任冠行刘若麟陈霖刘伟锋杨天足中南大学冶金与环境学院长沙410083

工业湿法炼锌过程中会产生大量锌浸出渣,选择性回收其中的锌成为了研究热点。本文通过硫酸铵与锌浸出渣混合焙烧后水浸实现其中的铁和锌分离,从而实现资源综合利用。通过研究确定了最优焙烧条件,即硫酸铵与锌浸出渣质量比为1.30、焙烧... 详细信息

工业湿法炼锌过程中会产生大量锌浸出渣,选择性回收其中的锌成为了研究热点。本文通过硫酸铵与锌浸出渣混合焙烧后水浸实现其中的铁和锌分离,从而实现资源综合利用。通过研究确定了最优焙烧条件,即硫酸铵与锌浸出渣质量比为1.30、焙烧温度为650℃、焙烧时间为240 min。结果表明,硫酸铵与铁酸锌在325~425℃时,反应生成(NH_(4))_(2)Zn(SO_(4))_(2)和NH_(4)Fe(SO_(4))_(2);然后在500~650℃下,(NH_(4))_(2)Zn(SO_(4))_(2)和NH_(4)Fe(SO_(4))_(2)各自分解生成ZnSO_(4)和Fe_(2)(SO_(4))_(3),其中Fe_(2)(SO_(4))_(3)继续分解生成Fe_(2)O_(3)和SO_(3)。在最优条件下所得焙烧产物经水浸后,锌的浸出率达到93.53%,而铁的浸出率为5.97%,实现了锌和铁的有效选择性分离。

关键词：锌浸出渣铁酸锌硫酸铵焙烧锌铁

Offload Strategy for Edge Computing in Satellite Networks Based on Software Defined Network

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Computers, Materials & Continua 2025年第1期82卷 863-879页

作者： Zhiguo liu Yuqing Gui lin Wang Yingru Jiang Communication and Network Laboratory Dalian UniversityDalian116622China College of Environment and Chemical Engineering Dalian UniversityDalian116622China

Satellite edge computing has garnered significant attention from researchers;however,processing a large volume of tasks within multi-node satellite networks still poses considerable *** sharp increase in user demand for latency-sensitive tasks has inevitably led to offloading bottlenecks and insufficient computational capacity on individual satellite edge servers,making it necessary to implement effective task offloading scheduling to enhance user *** this paper,we propose a priority-based task scheduling strategy based on a Software-Defined Network(SDN)framework for satellite-terrestrial integrated networks,which clarifies the execution order of tasks based on their ***,we apply a Dueling-Double Deep Q-Network(DDQN)algorithm enhanced with prioritized experience replay to derive a computation offloading strategy,improving the experience replay mechanism within the Dueling-DDQN ***,we utilize the Deep Deterministic Policy Gradient(DDPG)algorithm to determine the optimal resource allocation strategy to reduce the processing latency of *** results demonstrate that the proposed d3-DDPG algorithm outperforms other approaches,effectively reducing task processing latency and thus improving user experience and system efficiency.

关键词： Satellite network edge computing task scheduling computing offloading

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报废汽车高值元器件的氧化浸出试验

有色金属（冶炼部分） 2021年第6期 42-45,71页

作者：刘珍珍刘勇刘若麟广东省科学院资源综合利用研究所广州510651 稀有金属分离与综合利用国家重点实验室广州510651 广东省矿产资源开发和综合利用重点实验室广州510651

以报废汽车高值元器件废催化剂为原料,探讨了铂、钯、铑的浸出条件。分别研究了氧化浸出过程中盐酸浓度、时间、温度、氯酸钾百分比、固液比等对铂、铑、钯浸出率的影响。结果表明,较佳浸出工艺条件为:盐酸浓度9mol/L、反应时间2h、反... 详细信息

以报废汽车高值元器件废催化剂为原料,探讨了铂、钯、铑的浸出条件。分别研究了氧化浸出过程中盐酸浓度、时间、温度、氯酸钾百分比、固液比等对铂、铑、钯浸出率的影响。结果表明,较佳浸出工艺条件为:盐酸浓度9mol/L、反应时间2h、反应温度90℃、氯酸钾百分比5%、固液比0.20g/mL、搅拌速率400r/min,在上述工艺条件下,铂、钯、铑的浸出率分别为95.15%、96.44%、83.30%。

关键词：报废汽车高值元器件废催化剂铂族金属浸出

RF Optimizer Model for Predicting Compressive Strength of Recycled Concrete

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 215-223页

作者： liu lin WANG liuyan WANG Hui SUN Huayue School of Civil Engineering and Architecture Shenyang UniversityShenyang 110000China

Traditional machine learning(ML)encounters the challenge of parameter adjustment when predicting the compressive strength of reclaimed *** address this issue,we introduce two optimized hybrid models:the Bayesian optimization model(B-RF)and the optimal model(Stacking model).These models are applied to a data set comprising 438 observations with five input variables,with the aim of predicting the compressive strength of reclaimed ***,we evaluate the performance of the optimized models in comparison to traditional machine learning models,such as support vector regression(SVR),decision tree(DT),and random forest(RF).The results reveal that the Stacking model exhibits superior predictive performance,with evaluation indices including R2=0.825,MAE=2.818 and MSE=14.265,surpassing the traditional ***,we also performed a characteristic importance analysis on the input variables,and we concluded that cement had the greatest influence on the compressive strength of reclaimed concrete,followed by ***,the Stacking model can be recommended as a compressive strength prediction tool to partially replace laboratory compressive strength testing,resulting in time and cost savings.

关键词： machine learning recycled concrete compressive strength

Recent development in electrode design for wide-temperature supercapacitors

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Science China Chemistry 2025年第1期68卷 96-117页

作者： Jianhong liu Qiang Zhou Yuxiao lin Xinsheng Zhao Guangmin Zhou Xiaoxiao Li School of Physics and Electronic Engineering Jiangsu Normal University Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs). The active electrode is one of the most important parts of SC, which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature environment. Compared with the SC electrodes aimed for room-temperature application, the SC electrodes for operating at wide-temperature scene often face greater challenges. In this review, the main challenges of SC electrodes under various temperature conditions, including low, high and cross-fade temperatures, are summarized. The relevant performance decay and failure mechanisms of wide-temperature SC electrodes are analyzed. In addition, this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active materials. Finally, the future directions for exploring reliable wide-temperature SCs are also proposed.

关键词： supercapacitor wide-temperature electrode design active materials

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基于北斗卫星导航系统的差分定位应用的研究

通信电源技术 2020年第8期37卷 4-6页

作者：刘若林中海油信息科技有限公司深圳分公司广东深圳518000

随着导航定位技术的发展,全世界形成四大定位导航系统,分别为:美国的全球定位系统(GPS),欧盟的“伽利略”系统(Galileo),俄罗斯的“格洛纳斯”系统(GLONASS)以及我国的北斗卫星导航系统(BDS)。四大定位导航系统的功能、性能、特点和目... 详细信息

随着导航定位技术的发展,全世界形成四大定位导航系统,分别为:美国的全球定位系统(GPS),欧盟的“伽利略”系统(Galileo),俄罗斯的“格洛纳斯”系统(GLONASS)以及我国的北斗卫星导航系统(BDS)。四大定位导航系统的功能、性能、特点和目的各不相同,以及民用层面的高速发展,也不尽能满足其更安全、更实时和更精确的需求。新型差分定位系统一改以往地基模式,而以北斗卫星导航系统为主系统提供定位信息,并通过接收通过海事卫星INMARSAT的L波段下行播发的修正数据,实现了实时、安全和高精的厘米级的定位需求的新模式。

关键词：北斗卫星海事卫星实时高精安全

改性海藻酸钠活化SiO_2纳米粒子稳定载药Pickering乳液及释药性

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高等学校化学学报 2013年第9期34卷 2164-2170页

作者：颜慧琼李嘉诚冯玉红胡文涛刘若林林强海南大学材料与化工学院化学系海口570228 海南师范大学化学化工学院化学系海口571100

以胆固醇疏水改性两亲性海藻酸钠衍生物表面,活化SiO2纳米粒子,再制得负载氯氟氰菊酯的O/W型Pickering乳液.通过傅里叶变换红外光谱(FTIR),氢核磁共振波谱(1H NMR)、荧光光谱、动态光散射、光学显微镜和释药实验分别对海藻酸钠衍生物和P... 详细信息

以胆固醇疏水改性两亲性海藻酸钠衍生物表面,活化SiO2纳米粒子,再制得负载氯氟氰菊酯的O/W型Pickering乳液.通过傅里叶变换红外光谱(FTIR),氢核磁共振波谱(1H NMR)、荧光光谱、动态光散射、光学显微镜和释药实验分别对海藻酸钠衍生物和Pickering乳液的性能进行了表征.结果表明,胆固醇基接枝到了海藻酸钠分子链上,改性后的海藻酸钠临界聚集浓度由1.26 mg/L降为0.28 mg/L,表现出了良好的两亲性.将海藻酸钠衍生物(CSAD)和表面活性剂十六烷基三甲基溴化铵(CTAB)吸附于SiO2纳米粒子表面,得到活化SiO2纳米粒子,其Zeta电位分别为-30.7和16.4 mV,粒径分别增大到583.3和438.4 nm.由CSAD活化SiO2粒子制备的乳液释药速率更缓慢.CSAD的交联作用使吸附于油水界面的活化SiO2粒子形成了比较稳定的网络结构或界面膜.

关键词：氯氟氰菊酯海藻酸钠胆固醇两亲性 Pickering乳液 SiO2纳米粒子海藻酸钠衍生物

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航天密封圈的曲面成像理论及其缺陷检测

光学精密工程 2015年第11期23卷 3051-3060页

作者：何博侠张毅童楷杰李春雷刘若琳南京理工大学机械工程学院江苏南京210094

针对利用视觉图像技术检测O形(密封)圈这类全向曲面特征零件的表面缺陷时存在曲面成像一致性差的难题,研究了曲面成像基础理论和航天系统用O形圈表面成像及其表面缺陷的全自动检测方法。首先,把O形圈表面划分为细小网格状的曲面小块,基... 详细信息

针对利用视觉图像技术检测O形(密封)圈这类全向曲面特征零件的表面缺陷时存在曲面成像一致性差的难题,研究了曲面成像基础理论和航天系统用O形圈表面成像及其表面缺陷的全自动检测方法。首先,把O形圈表面划分为细小网格状的曲面小块,基于曲面小块的双向反射分布函数得到点光源辐照时曲面小块的辐射强度计算公式。然后,通过半球积分求得空间连续光源辐照条件下曲面小块的辐射强度计算方法。最后,结合O形圈曲面方程,建立了O形圈表面成像理论,并据此提出基于三镜头相机组的O形圈表面缺陷成像检测方法。对O形圈弧段曲面的成像实验表明:理论计算的亮度分布与实际亮度分布一致,垂直安装的镜头相机组对应的平均亮度误差为6.8,标准差为12.6;倾斜安装的镜头相机组相应的平均亮度误差最大为19.4,标准差为10.3;缺陷检测实验表明,所提方法能可靠检测出O形圈表面任意位置的缺陷,能够实现航天密封圈的全自动可靠检测。

关键词：航天材料密封圈曲面成像缺陷检测双向反射分布函数自动检测

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen liu Xuliang lin Xueqing Qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling