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Higher alcohols synthesis from syngas over lanthanum-promoted CuZnAl catalyst

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Journal of Energy Chemistry 2018年第1期27卷 319-325页

作者： Xuan deng Yong-Jun Liu Wei Huang Key Laboratory of Coal Sdence and Technology of Ministry of Education and Shanxi Province Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Center of Information Management and Development Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

CuZnAl catalysts with different La loadings were prepared by a complete liquid phase method and tested for higher alcohols（C_（2＋）OH） synthesis from syngas at the conditions of 250–290 ℃, 4.5 MPa, feed low rate = 150 mL/min and H_2/CO = 2. The catalysts were characterized by XRD, H_2-TPR, NH_3-TPD, N_2 adsorption, XPS, and TEM techniques. Characterization results showed that the incorporation of La into CuZnAl catalysts resulted in the decrease of crystallite size of Cu^0 and a strong interaction among copper and zinc or aluminum oxides. Especially, the incorporation of La increased the amount of weak acid and the Cu content on catalyst surface, which was speculated to contribute the formation of higher alcohols. Among these La-promoted CuZnAl catalysts, the La0.1 catalyst exhibited the best catalytic performance and the selectivity to higher alcohols reached above 60% when the reaction temperature was 290 ℃.

关键词： Syngas C2+OH CuZnAl La promoter Slurry bed reactor

基于STL-Former的中短期光伏功率预测

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热能动力工程 2024年第4期39卷 140-146,153页

作者：李灯熬白晓东夏鸿伟冯丁山西省能源互联网研究院山西太原030000 太原理工大学计算机科学与技术学院(大数据学院) 山西太原030024 新疆石文科技发展有限公司新疆乌鲁木齐830011 太原师范学院计算机科学与技术学院山西太原030619

由于光伏发电具有间歇性和波动性,给电网运行的安全性和稳定性造成危害,对光伏功率进行准确预测可以有效解决这一问题。本文提出一种基于STL-Former的中短期光伏功率预测模型,该模型结合了季节趋势局部加权回归分解(STL分解)与神经网络... 详细信息

由于光伏发电具有间歇性和波动性,给电网运行的安全性和稳定性造成危害,对光伏功率进行准确预测可以有效解决这一问题。本文提出一种基于STL-Former的中短期光伏功率预测模型,该模型结合了季节趋势局部加权回归分解(STL分解)与神经网络模型。首先,STL-Former模型将光伏功率数据通过STL分解进行特征扩充,用于提取基于历史序列的周期项、趋势项特征。然后,拼接周期项、趋势项特征和原特征,进行数据预处理和特征编码并使用基于Informer模型的神经网络进行功率预测。最后,在真实数据集上进行大量实验。实验结果表明:STL-Former在中短期光伏功率预测任务中精度较高,其中在2 h光伏功率预测任务时,平均绝对值误差为0.176、均方误差为0.180;在28 h光伏功率预测任务时,平均绝对值误差为0.170、均方误差为0.154。

关键词：深度学习光伏功率预测 STL分解

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黄铵铁矾渣热分解反应机理及其动力学解析

中国有色金属学报 2024年第7期34卷 2452-2462页

作者：崔雅茹李邓王国华李小明赵俊学王正民桂海平西安建筑科技大学冶金工程学院西安710055 汉中锌业有限责任公司汉中724204

针对黄铵铁矾渣侧吹熔炼熔渣稳定控制研究需求,采用热重−差热−质谱联用仪结合XRD、SEM-EDS等分析方法对其热分解过程及动力学特性进行研究。结果表明:黄铵铁矾渣中主要化合物为铵铁矾(NH_(4))Fe_(3)(SO_(4))_(2)(OH)_(6)、铁锌尖晶石(Zn... 详细信息

针对黄铵铁矾渣侧吹熔炼熔渣稳定控制研究需求,采用热重−差热−质谱联用仪结合XRD、SEM-EDS等分析方法对其热分解过程及动力学特性进行研究。结果表明:黄铵铁矾渣中主要化合物为铵铁矾(NH_(4))Fe_(3)(SO_(4))_(2)(OH)_(6)、铁锌尖晶石(Zn,Fe)Fe_(2)O_(4)及硫酸铅PbSO_(4)、CaSO_(4)(H_(2)O)_(2)等硫酸盐。在热分解过程中,铵铁矾在380℃左右发生了脱氨、脱羟反应,生成各种硫酸盐,其机理函数为减速型α−t曲线;Fe_(2)(SO_(4))3在610℃时发生了分解,反应表观活化能E为153.07 kJ/mol,强化气体产物的扩散有助于推进反应进程;硫酸铅在1080℃左右发生分解,其反应机理遵循三维扩散,表观活化能较高(555.90 kJ/mol);硫酸铅分解的主要限制性因素是分解产物PbO在渣中的扩散,可通过降低渣系的熔点及黏度促进反应进行。

关键词：黄铵铁矾渣热分解反应机理动力学特性表观活化能

Quantitative estimation of enzymatic released specific oligosaccharides from Hericium erinaceus polysaccharides using CE-LIF

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Journal of Pharmaceutical Analysis 2023年第2期13卷 201-208页

作者： Yong deng Jing Zhao Shaoping Li State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao SAR999078China Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology University of MacaoMacao SAR999078China Macao Centre for Testing of Chineese Medicine University of MacaoMacao SAR999078China

Polysaccharides exhibit multiple pharmacological activities which are closely related to their structural ***,quantitatively quality control of polysaccharides based on their chemical charac-teristics is important for their application in biomedical and functional food ***,poly-saccharides are mixed macromolecular compounds that are difficult to isolate and lack standards,making them challenging to quantify *** this study,we proposed an improved saccharide mapping method based on the release of specific oligosaccharides for the assessment of Hericium eri-naceus polysaccharides from laboratory cultured and different regions of ***,a polysaccharide from *** was digested by b-(1-3)-glucanase,and the released specific oligosaccharides were labeled with 8-aminopyrene-1,3,6-trisulfonic-acid(APTS)and separated by using micellar electrokinetic chromatography(MEKC)coupled with laser induced fluorescence(LIF),and quantitatively *** presented higher resolution compared to polysaccharide analysis using carbohydrate gel elec-trophoresis(PACE),and provided great peak capacity between oligosaccharides with polymerization degree of 2(DP2)and polymerization degree of 6(DP6)in a dextran ladder *** results of high performance size exclusion chromatography coupled with multi-angle laser light scattering and refractive index detector(HPSEC-MALLS-RI)showed that 12 h was sufficient for complete digestion of polysaccharides from ***(DP3)was used as an internal standard for quantifi-cation of all the *** calibration curve for DP3 showed a good linear regression(R2>0.9988).The limit of detection(LOD)and limit of quantification(LOQ)values were 0.05 mg/mL and 0.2 mg/mL,*** recovery for DP3 was 87.32(±0.03)%in the three independent *** sum up,this proposed method is helpful for improving the quality control of polysaccharides from *** as well as othe

关键词： Saccharide mapping Hericium erinaceus Polysaccharide CE-LIF PACE

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三段制圆弧轨道设计参数的谱集计算

石油学报 2024年第4期45卷 708-717页

作者：王海涛郑鹏邓青山孙立伟鲁港孟庆安覃吉昆仑数智科技有限责任公司北京100043 中国石油渤海钻探工程有限公司定向井技术服务分公司天津300280 中国石油渤海钻探工程有限公司第三钻井工程分公司天津300280 中国石油长城钻探工程有限公司工程技术研究院辽宁盘锦124010

为了解决井眼轨道设计中设计参数输入“试凑”问题,发展了设计参数谱集计算的数值算法。以二分法为基础,推导出了两个设计参数各自的整体允许范围的算法,以及当一个设计参数给定时另一个设计参数允许范围的算法,使用这些算法能有效地计... 详细信息

为了解决井眼轨道设计中设计参数输入“试凑”问题,发展了设计参数谱集计算的数值算法。以二分法为基础,推导出了两个设计参数各自的整体允许范围的算法,以及当一个设计参数给定时另一个设计参数允许范围的算法,使用这些算法能有效地计算出谱集边界,从而绘制出设计参数谱集图形。进一步证明了谱集结构定理:三段制设计参数谱集由一个二维有界连通闭集或者不相交的多个二维有界连通闭集的并集组成。数值算例的计算结果表明,谱集计算算法能求出连通和不连通等各种情况的谱集边界。谱集计算算法在井眼轨道设计软件中可为软件用户提供可视化的设计参数选择数值范围,提高设计效率。

关键词：定向钻井井眼轨道三段制谱集二分法

计及电网侧储能交互作用的MIDC后续换相失败机理分析及抑制策略

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高电压技术 2024年第7期50卷 2820-2832页

作者：尹寒航周小平陈燕东邓凌峰洪乐荣朱仁龙国家电能变换与控制工程技术研究中心(湖南大学) 长沙410082

利用电网侧储能的无功支撑能力有望改善多馈入直流输电(multi-infeed high voltage direct current,MIDC)的电压暂态特性,但是电网侧储能接入后,电力电子装备之间的相互作用会影响MIDC控制特性。在计及电网侧储能与MIDC交互作用基础上,... 详细信息

利用电网侧储能的无功支撑能力有望改善多馈入直流输电(multi-infeed high voltage direct current,MIDC)的电压暂态特性,但是电网侧储能接入后,电力电子装备之间的相互作用会影响MIDC控制特性。在计及电网侧储能与MIDC交互作用基础上,分析了故障持续阶段与故障清除阶段的MIDC后续换相失败机理。研究表明,在故障持续阶段,由于电网侧储能的交互作用,定电流控制切换为定关断角控制时直流电流更大,并且电流偏差控制输出减少使越前触发角下降,造成换相供给面积不足的影响更大;在故障清除阶段,计及直流电流振荡影响,越前触发角下降及大幅波动会导致换相供给面积不足;在MIDC系统处于功率恢复过程中,若电网侧储能无功功率指令置为0,将增大后续换相失败风险。然后,针对电网侧储能以及MIDC控制策略进行改进,提出了计及电网侧储能交互作用的MIDC后续换相失败抑制策略。最后,在多种故障类型下仿真验证了所提控制策略有效性。

关键词：多馈入直流输电系统电网侧储能后续换相失败机理分析抑制策略

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Pseudotyped lentiviral vectors:Ready for translation into targeted cancer gene therapy?

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Genes & Diseases 2023年第5期10卷 1937-1955页

作者： Longfei deng Ping Liang Hongjuan Cui Cancer Center Medical Research InstituteSouthwest UniversityChongqing 400716China Department of Neurosurgery Children's Hospital of Chongqing Medical UniversityNational Clinical Research Center for Child Health and DisordersMinistry of Education Key Laboratory of Child Development and DisordersChongqing 400014China Chongqing Key Laboratory of Pediatrics Chongqing 400014China State Key Laboratory of Silkworm Genome Biology Southwest UniversityChongqing 400716China

Gene therapy holds great promise for curing cancer by editing the deleterious genes of tumor cells,but the lack of vector systems for efficient delivery of genetic material into specific tumor sites in vivo has limited its full therapeutic potential in cancer gene *** the past two decades,increasing studies have shown that lentiviral vectors(LVs)modified with different glycoproteins from a donating virus,a process referred to as pseudotyping,have altered tropism and display cell-type specificity in transduction,leading to selective tumor cell *** feature of LVs together with their ability to enable high efficient gene delivery in dividing and non-dividing mammalian cells in vivo make them to be attractive tools in future cancer gene *** review is intended to summarize the status quo of some typical pseudotypings of LVs and their applications in basic anti-cancer studies across many *** opportunities of translating pseudotyped LVs into clinic use in cancer therapy have also been discussed.

关键词： Cancer therapy Clinical translation Gene delivery Lentiviral vector Pseudotype

Soft-switching SiC power electronic conversion for distributed energy resources and storage applications

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Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1340-1354页

作者： Keyan SHI Jinyi deng An ZHAO Dehong XU College of Electrical Engineering Zhejiang UniversityHangzhou 310027China

Power electronic conversion plays an important role in flexible AC or DC transmission and distribution systems,integration of renewable energy resources,and energy storage systems to enhance efficiency,controllability,stability,and reliability of the *** efficiency and reliability of power electronic conversion are critical to power system *** way to enhance the efficiency and reliability of power electronic conversion is soft-switching *** paper introduces a generic zero-voltage-switching(ZVS)technique based on silicon carbide(Si C)power *** the proposed ZVS technique,all semiconductor switching devices in a power converter can realize ZVS ***,the applications of the ZVS technique in different power electronic conversion systems such as photovoltaic inverters,wind power systems,energy storage systems and flexible AC transmission system devices are ***,as an example,the operation performance and efficiency improvement of a Si C metal-oxide-semiconductor field-effect transistor(MOSFET)ZVS back-to-back converter are discussed.

关键词： Power electronic conversion Flexible AC transmission systems(FACTS) Soft-switching SiC MOSFET Distributed energy resources

GEOLOGICAL FEATURE OF YUNKAI RIFT

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中国有色金属学会会刊：英文版 1998年第1期8卷 161-164页

作者： Li, Peizheng Zeng, Xiaodong deng, Jiqiu Central South Univ of Technology Changsha China

ＧＥＯＬＯＧＩＣＡＬＦＥＡＴＵＲＥＯＦＹＵＮＫＡＩＲＩＦＴ①ＬｉＰｅｉｚｈｅｎｇ，ＺｅｎｇＸｉａｏｄｏｎｇａｎｄＤｅｎｇＪｉｑｉｕＣｏｌｅｇｅｏｆＲｅｓｏｕｒｃｅ，ＥｎｖｉｒｏｎｍｅｎｔａｎｄＣｉｖｉｌＥｎｇｉｎｅｒ... 详细信息

ＧＥＯＬＯＧＩＣＡＬＦＥＡＴＵＲＥＯＦＹＵＮＫＡＩＲＩＦＴ①ＬｉＰｅｉｚｈｅｎｇ，ＺｅｎｇＸｉａｏｄｏｎｇａｎｄＤｅｎｇＪｉｑｉｕＣｏｌｅｇｅｏｆＲｅｓｏｕｒｃｅ，ＥｎｖｉｒｏｎｍｅｎｔａｎｄＣｉｖｉｌＥｎｇｉｎｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵ...

关键词： Yunkai rift edge faults sedimentary formation evolution history