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Preparation of Ionic Liquids Immobilized on FMIL-101 Catalysts for Conversion of CO_(2)to Propylene Carbonate

China Petroleum Processing & Petrochemical Technology 2023年第1期25卷 54-65页

作者： Sun Wenjie ran weiting Guo Liying Song Xiaohui LüDonghao School of Petrochemical Engineering Shenyang University of TechnologyLiaoyang 111003China

Metal-organic frameworks(MOFs)have attracted considerable research attention as a new type of porous material for catalytic ***,2,5-dihydroxyterephthalic acid was proposed to replace conventional terephthalic acid and reacted with chromic nitrate nonahydrate to synthesize a functional metal–organic framework(FMIL-101).This was then used to immobilize various compound ionic liquids to prepare three ionic liquids immobilized on FMIL-101 catalysts,namely,FMIL-101-[HeMIM]Cl/(ZnBr_(2))_(2),FMIL-101-[CeMIM]Cl/(ZnBr_(2))_(2),and FMIL-101-[AeMIM]Br/(ZnBr_(2))_(2).After characterization by Fourier-transform infrared spectroscopy,X-ray diffraction,ultraviolet spectroscopy,thermogravimetry,specific surface area analysis,and scanning electron microscopy,the catalysts were used to mediate cycloaddition reactions between carbon dioxide(CO_(2))and propylene *** effects of reaction temperature,reaction pressure,reaction time,and catalyst dosage on the catalytic performance were *** results revealed that the FMIL-101-supported CIL catalysts afforded the target product propylene carbonate with good catalytic performance and thermal *** optimal catalyst,FMIL-101-[CeMIM]Cl/(ZnBr_(2))_(2),displayed a propylene oxide conversion of 98.64%and a propylene carbonate selectivity of 96.63%at a reaction temperature of 110℃,a reaction pressure of 2.0 MPa,a catalyst dosage of 2.0%relative to propylene oxide,and a reaction time of 2.5 *** addition,the conversion and selectivity of the catalyst decreased slightly after four ***,the catalyst decreased slightly in catalytic performance after being recycled four times.

关键词： functional metal-organic frameworks(FMIL-101) compound salt ionic liquid immobilization catalysis CO_(2) cyclic carbonate

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杂多酸离子液体催化剂的制备及其合成可降解聚酯PES的催化性能

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沈阳工业大学学报 2024年第4期46卷 397-402页

作者：王戊赵园园冉维婷王海玥郭立颖中国五洲工程设计集团有限公司北京100053 沈阳工业大学石油化工学院辽宁辽阳111003

为了分析杂多酸离子液体催化剂的催化性能,以Fe为中心杂原子、Mo为配位原子,制备了杂多酸阴离子,并将其与1-羟丙基-3-甲基咪唑溴盐通过离子交换反应制备功能化杂多酸离子液体催化剂([HO-(CH_(2))_(2)-mim]_(5)[Ti(H_(2)O)FeMo_(11)O_(39... 详细信息

为了分析杂多酸离子液体催化剂的催化性能,以Fe为中心杂原子、Mo为配位原子,制备了杂多酸阴离子,并将其与1-羟丙基-3-甲基咪唑溴盐通过离子交换反应制备功能化杂多酸离子液体催化剂([HO-(CH_(2))_(2)-mim]_(5)[Ti(H_(2)O)FeMo_(11)O_(39)])。利用FT-IR、UV、XRD和TGA对所制催化剂进行结构表征与性能测试,通过正交试验优化工艺参数,探讨投料比、催化剂用量、酯交换反应温度和时间对其催化性能的影响。结果表明:所制催化剂结构正确,热性能良好,并具有较好催化效果。最佳工艺条件为:投料比2,催化剂质量分数1.0%,反应温度220℃,反应时间5 h,该条件下PES收率为75.32%。

关键词：废弃电解液杂多酸离子液体催化剂碳酸乙烯酯聚丁二酸二甲酯耦合反应 PES收率投料比酯交换反应

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TSCND:Temporal Subsequence-Based Convolutional Network with Difference for Time Series Forecasting

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Computers, Materials & Continua 2024年第3期78卷 3665-3681页

作者： Haoran Huang weiting Chen Zheming Fan MOE Research Center of Software/Hardware Co-Design Engineering East China Normal UniversityShanghai200062China

Time series forecasting plays an important role in various fields, such as energy, finance, transport, and weather. Temporal convolutional networks (TCNs) based on dilated causal convolution have been widely used in time series forecasting. However, two problems weaken the performance of TCNs. One is that in dilated casual convolution, causal convolution leads to the receptive fields of outputs being concentrated in the earlier part of the input sequence, whereas the recent input information will be severely lost. The other is that the distribution shift problem in time series has not been adequately solved. To address the first problem, we propose a subsequence-based dilated convolution method (SDC). By using multiple convolutional filters to convolve elements of neighboring subsequences, the method extracts temporal features from a growing receptive field via a growing subsequence rather than a single element. Ultimately, the receptive field of each output element can cover the whole input sequence. To address the second problem, we propose a difference and compensation method (DCM). The method reduces the discrepancies between and within the input sequences by difference operations and then compensates the outputs for the information lost due to difference operations. Based on SDC and DCM, we further construct a temporal subsequence-based convolutional network with difference (TSCND) for time series forecasting. The experimental results show that TSCND can reduce prediction mean squared error by 7.3% and save runtime, compared with state-of-the-art models and vanilla TCN.

关键词： Difference data prediction time series temporal convolutional network dilated convolution

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Durable poly(binaphthyl-co-p-terphenyl piperidinium)-based anion exchange membranes with dual side chains

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Journal of Energy Chemistry 2024年第2期89卷 324-335,I0008页

作者： weiting Gao Xuelang Gao Qiugen Zhang Aimei Zhu Qinglin Liu Department of Chemical&Biochemical Engineering Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryThe College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Department of Chemistry Pohang University of Science and Technology(POSTECH)Pohang 790-784South Korea

Building well-developed ion-conductive highways is highly desirable for anion exchange membranes(AEMs).Grafting side chain is a highly effective approach for constructing a well-defined phaseseparated morphological structure and forming unblocked ion pathways in AEMs for fast ion *** of side chains can further enhance phase separation due to the superhydrophobic nature of fluorine ***,their electronic effect on the alkaline stability of side chains and membranes is rarely ***,fluorine-containing and fluorine-free side chains are introduced into the polyaromatic backbone in proper configuration to investigate the impact of the fluorine terminal group on the stability of the side chains and membrane *** poly(binaphthyl-co-p-terphenyl piperidinium)AEM(QBNp TP)has the highest molecular weight and most dimensional stability due to its favorable backbone arrangement among ortho-and meta-terphenyl based ***,by introducing both a fluorinated piperidinium side chain and a hexane chain into the p-terphenyl-based backbone,the prepared AEM(QBNp TP-QFC)presents an enhanced conductivity(150.6 m S cm^(-1))and a constrained swelling at 80℃.The electronic effect of fluorinated side chains is contemplated by experiments and *** results demonstrate that the presence of strong electro-withdrawing fluorine groups weakens the electronic cloud of adjacent C atoms,increasing OH^(-)attack on the C atom and improving the stability of piperidinium *** QBNp TP-QFC possesses a robust alkaline stability at 80℃(95.3%conductivity retention after testing in 2 M Na OH for 2160 h).An excellent peak power density of 1.44 W cm^(-2)and a remarkable durability at 80℃(4.5%voltage loss after 100 h)can be observed.

关键词： Anion exchange membranes Backbone structure Fluorinated side chain Alkaline stability

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Parameter calibration of the tensile-shear interactive damage constitutive model for sandstone failure

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1153-1174页

作者： Yun Shu Zheming Zhu Meng Wang weiting Gao Fei Wang Duanying Wan Yuntao Wang MOE Key Laboratory of Deep Earth Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu610065China Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065China Tianfu Engineering-oriented Numerical Simulation & Software Innovation Center Chengdu620107China

The tensile-shear interactive damage(TSID)model is a novel and powerful constitutive model for rock-like *** study proposes a methodology to calibrate the TSID model parameters to simulate *** basic parameters of sandstone are determined through a series of static and dynamic tests,including uniaxial compression,Brazilian disc,triaxial compression under varying confining pressures,hydrostatic compression,and dynamic compression and tensile tests with a split Hopkinson pressure *** on the sandstone test results from this study and previous research,a step-by-step procedure for parameter calibration is outlined,which accounts for the categories of the strength surface,equation of state(EOS),strain rate effect,and *** calibrated parameters are verified through numerical tests that correspond to the experimental loading *** between numerical results and experimental data indicates the precision and reliability of the calibrated *** methodology presented in this study is scientifically sound,straightforward,and essential for improving the TSID ***,it has the potential to contribute to other rock constitutive models,particularly new user-defined models.

关键词： Damage constitutive model Parameter calibration Rock modeling Sandstone Dynamic impact load Tensile-shear interactive damage(TSID)model

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基于表面活性技术的温拌沥青混合料应用研究

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石油沥青 2011年第5期25卷 28-31页

作者：冉维廷毕玉峰山东建筑大学土木学院济南250101 山东省公路局养护处济南250101

温拌技术是指采用新工艺或者新材料,实现原材料相同条件下拌和温度与压实温度的降低,同时做到保留或者改善热拌沥青混合料原有性能的沥青混合料拌和技术。主要介绍国内外应用较为广泛的基于表面活性剂,即采用直投式DAT温拌添加剂实现温... 详细信息

温拌技术是指采用新工艺或者新材料,实现原材料相同条件下拌和温度与压实温度的降低,同时做到保留或者改善热拌沥青混合料原有性能的沥青混合料拌和技术。主要介绍国内外应用较为广泛的基于表面活性剂,即采用直投式DAT温拌添加剂实现温拌的沥青混合料生产工艺,并结合工程实例,分析温拌技术的实践效果。以期待对温拌技术应用提供科学的参考建议,并促进节能减排低碳环保的温拌沥青混合料更好地发展。

关键词：温拌添加剂路面维修

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从电影之“镜”到电影之“境”:基于意境说的电影哲学“中国化”

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电影艺术 2024年第4期 3-10页

作者：范炜婷重庆大学美视电影学院文学系伦敦大学国王学院

当我们将意境这一传统美学概念移植到电影学界时,不能仅仅将其视为一种美学范式,而应重视它所指涉的中国传统哲学思想,并探究这种哲学内涵与电影哲学对接的可能。其中,“境”这一概念指涉的佛教哲学时常使用“镜子”作为关键隐喻。作为... 详细信息

当我们将意境这一传统美学概念移植到电影学界时,不能仅仅将其视为一种美学范式,而应重视它所指涉的中国传统哲学思想,并探究这种哲学内涵与电影哲学对接的可能。其中,“境”这一概念指涉的佛教哲学时常使用“镜子”作为关键隐喻。作为“镜”的感知主体与作为“境”的被感知客体组成另类的镜像结构,指向一种流动的内在关联性。这成为中国哲学介入当下欧美电影哲学,以中国视角重新定义电影作为一种媒介可以如何感知与认识世界的绝佳通路。

关键词：中国电影理论意境电影机器德勒兹电影现象学

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A pilot study on Paxlovid therapy for hemodialysis patients with severe acute respiratory syndrome coronavirus 2 infections

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Frontiers of Medicine 2024年第1期18卷 169-179页

作者： Xu Hao Zhiyao Bao ranran Dai Xiaojing Wu Xin Li Muyin Zhang Hao Li Lili Xu Panpan Qiao Xuefei Liu weiting Hu Ze Zhang Jie Fang Min Zhou Weiming Wang Jieming Qu Department of Nephrology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Department of Pulmonary and Critical Care Medicine Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Institute of Respiratory Diseases Shanghai Jiao Tong University School of MedicineShanghai200025China Department of Pharmacy Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China

We aimed to investigate the safety and efficacy of nirmatrelvir/ritonavir(Paxlovid)therapy for hemodialysis-dependent patients with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)*** hemodialysis patients infected with the Omicron variant of SARS-CoV-2 from April 3 to May 30,2022,were *** parameters and chest CT(computed tomography)imaging were *** treatment group included six patients who received 150 mg/100 mg of Paxlovid orally once daily for 5 days,whereas the control group included seven patients who received basic *** serious adverse reactions or safety events were *** control patients progressed to moderate disease,and none in the treatment group showed progression of chest CT findings(Prance and low viral load on Day ***,83.3%of the patients in the treatment group and 57.1%of the patients in the control group turned negative within 22 *** the Paxlovid treatment group,we found significantly increased levels of lymphocytes(P=0.03)and eosinophils(P=0.02)and decreased levels of D-dimer on Day 8 compared with those on Day *** therapy showed a potential therapeutic effect with good tolerance in hemodialysis *** optimal dose and effectiveness evaluation must be further investigated in a largeer cohort.

关键词： Paxlovid hemodialysis SARS-CoV-2 viral load chest CT scan

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局部非线性结构自由界面子结构模态综合法

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航空学报 2024年第13期45卷 296-308页

作者：谭星陈卫婷王陶何欢南京航空航天大学航空航天结构力学及控制全国重点实验室南京210016 南京航空航天大学振动工程研究所南京210016 南京工业大学应急管理学院南京210024

为了提高局部非线性结构的动响应计算效率,提出了一种考虑一般黏性阻尼的自由界面子结构模态综合法。首先,将整体系统按照局部非线性的位置划分为各个线性子结构。然后,利用一种不需要考虑子结构是否有刚体模态的剩余模态集构造方式,构... 详细信息

为了提高局部非线性结构的动响应计算效率,提出了一种考虑一般黏性阻尼的自由界面子结构模态综合法。首先,将整体系统按照局部非线性的位置划分为各个线性子结构。然后,利用一种不需要考虑子结构是否有刚体模态的剩余模态集构造方式,构造出用于降阶的缩减模态集。在降阶过程中,通过忽略与高阶模态相关的阻尼力和惯性力,建立了非线性界面力和模态位移、模态速度之间的近似关系式。基于此关系式,将非线性界面力、模态位移和模态速度作为变量放入状态空间,并利用界面协调关系进行子结构降阶模型综合。最后,通过一个含立方非线性弹簧与阻尼连接的弹簧质量块系统和一个含非线性中介支承的双转子系统对所提方法的有效性进行了验证。

关键词：局部非线性一般黏性阻尼子结构模态综合自由界面双转子系统

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间歇采样转发干扰下基于稀疏LVD的高速目标检测

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信号处理 2024年第5期40卷 982-992页

作者：冯维婷梁青西安邮电大学电子工程学院陕西西安710121

间歇采样转发干扰作为雷达工作环境中一种广泛应用的干扰,通过对雷达发射信号进行多次采样和转发,在接收端可形成假目标使得雷达系统难以检测到真实目标。本文分析了高速运动目标的雷达回波特点,鉴于目标信号具有线性调频信号形式,采用... 详细信息

间歇采样转发干扰作为雷达工作环境中一种广泛应用的干扰,通过对雷达发射信号进行多次采样和转发,在接收端可形成假目标使得雷达系统难以检测到真实目标。本文分析了高速运动目标的雷达回波特点,鉴于目标信号具有线性调频信号形式,采用吕氏分布(Lv’s Distribution,LVD)方法进行目标检测,然而在间歇采样转发干扰下该方法失效,无法检测到真实目标。针对高速运动目标在间歇采样转发干扰下的检测和参数估计问题,提出了稀疏LVD的高速目标检测方法。分析了间歇采样转发干扰的时域特征,考虑到间歇采样转发干扰具有时域采样不连续的特点,利用能量函数设置门限提取雷达回波中未受干扰影响的部分目标信号,对部分目标回波信号计算对称参数瞬时自相关函数并矢量化表示。然后利用线性调频Z变换矩阵和快速傅里叶变换矩阵构造出稀疏LVD表示模型,将高速目标检测问题转换为中心频率-调频斜率域上的稀疏求解问题。最后利用正交匹配追踪算法获得稀疏解,实现高速运动目标检测和参数估计。仿真实验结果表明,所建立的稀疏LVD表示模型正确有效,在间歇采样直接转发干扰和间歇采样重复转发干扰两种情况下稀疏LVD方法均可准确检测目标,具有良好的目标检测和参数估计性能。

关键词：高速目标检测参数估计稀疏吕氏分布间歇采样转发干扰

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