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Synthesis and Crystal Structure of Tri(8-quinolinol) Yttrium-Tri(8-quinolinol) Nickel Perchlorate [YQ(HQ)_2][NiQ_3](ClO_4)

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Chemical Research in Chinese Universities 1990年第4期6卷 271-275页

作者： Zhang Mingjie, Huang chunhui and xu Guangxian (Chemistry Department, Peking University, Beijing)

The title compound was synthesised and the X-ray diffraction analysis shows that the crystal belongs to in monoclinic system, space group P21/n with α=16. 972(4) A ,b=14. 128(3)A , c = 22. 615(4)A ,β=103.16(2)°,V=528.14A3,F(000) = 2264, Z=4. Both cation [YQ(HQ)2]2+ and anion [NiQ3]- are of distorded octahedral geometry with coordination number of 6. Its IR spectrum was recorded.

关键词： 8-Quinolinol Yttrium Nickel Complex Crystal structure

Remote copper-catalyzed enantioselective substitution of yne-thiophene carbonates

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Science China Chemistry 2024年第4期67卷 1175-1180页

作者： Hao-Dong Qian Xiang Li Tingrui Yin Wei-Feng Qian chunhui Zhao Cuiju Zhu Hao xu CCNU-uOttawa Joint Research Centre Key Laboratory of Pesticides&Chemical Biology of Ministry of EducationInternational Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China

Here,we describe a strategy for the copper-catalyzed asymmetric heteroarylation of yne-thiophene carbonates with indoles via remote *** key to the success of this strategy lies in the design of the alkynyl group at the ortho-position of the heterocycle thiophene,enabling the formation of a triarylmethane moiety via very remote ***,the concept of remote copper-catalyzed asymmetric transformation extends not only to yne-allylic esters but also to yne-aryl *** reaction readily provides a diverse array of chiral triarylmethanes with high efficiency,enantioselectivity,and excellent functional group ***,facile follow-up transformations underscore their potential utility in the synthesis of various enantioenriched building *** mechanistic studies support the plausibility of the remote substitution pathway.

关键词： remote substitution copper catalyst asymmetric catalysis triaryl methanes

Automatically identifying imperfections and attacks in practical quantum key distribution systems via machine learning

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Science China(Information Sciences) 2024年第10期67卷 359-372页

作者： Jiaxin xu Xiao MA Jingyang LIU chunhui ZHANG Hongwei LI Xingyu ZHOU Qin WANG Institute of Quantum Information and Technology Nanjing University of Posts and Telecommunications Telecommunication and Networks National Engineering Research CenterNanjing University of Posts and Telecommunications Henan Key Laboratory of Quantum Information and Cryptography Strategic Support Force Information Engineering University

The realistic security of quantum key distribution(QKD) systems is currently a hot research topic in the field of quantum communications. There are always defects in practical devices, and eavesdroppers can make use of the security risk points of various devices to obtain key information. To date, current types of security analysis tend to analyze each security risk point individually, thereby posing great challenges for the overall security evaluation of QKD systems. In this paper, for the first time, we employ machine learning algorithms to identify the defects of different devices and certain attacks in real time, with an accuracy of 98%. It provides a novel solution for the practical security evaluation of QKD systems, thereby addressing the bottleneck problem of multiple risk points being difficult to address simultaneously in QKD systems,thus paving the way for the future large-scale application of quantum communication networks.

关键词： quantum key distribution device imperfections eavasdropping attacks real-time detection machine learning algorithms

同方期刊数据库

A systematic survey of LU domain-containing proteins reveals a novel human gene,LY6A,which encodes the candidate ortholog of mouse Ly-6A/Sca-1 and is aberrantly expressed in pituitary tumors

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Frontiers of Medicine 2023年第3期17卷 458-475页

作者： Dan Liu chunhui xu Yanting Liu Wen Ouyang Shaojian Lin Aining xu Yuanliang Zhang Yinyin Xie Qiuhua Huang Weili Zhao Zhu Chen Lan Wang Saijuan Chen Jinyan Huang Zhe Bao Wu Xiaojian Sun Shanghai Institute of Hematology State Key Laboratory of Medical GenomicsNational Research Center for Translational Medicine at ShanghaiRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200025China Key Laboratory of Systems Biomedicine Ministry of EducationShanghai Center for Systems BiomedicineShanghai Jiao Tong UniversityShanghai 200240China CAS Key Laboratory of Tissue Microenvironment and Tumor Shanghai Institute of Nutrition and HealthShanghai Institutes for Biological SciencesUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Department of Neurosurgery Center of Pituitary TumorRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200025China Biomedical Big Data Center First Affiliated HospitalZhejiang University School of Medicineand Cancer CenterZhejiang UniversityHangzhou 310000China Department of Neurosurgery First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000China

The Ly-6 and uPAR(LU)domain-containing proteins represent a large family of cell-surface *** particular,mouse Ly-6A/Sca-1 is a widely used marker for various stem cells;however,its human ortholog is *** this study,based on a systematic survey and comparative genomic study of mouse and human LU domain-containing proteins,we identified a previously unannotated human gene encoding the candidate ortholog of mouse Ly-6A/*** gene,hereby named LY6A,reversely overlaps with a lncRNA gene in the majority of exonic *** found that LY6A is aberrantly expressed in pituitary tumors,but not in normal pituitary tissues,and may contribute to *** to mouse Ly-6A/Sca-1,human LY6A is also upregulated by interferon,suggesting a conserved transcriptional regulatory mechanism between humans and *** cloned the full-length LY6A cDNA,whose encoded protein sequence,domain architecture,and exon‒intron structures are all well conserved with mouse Ly-6A/*** expression of the LY6A protein in cells demonstrates that it acts the same as mouse Ly-6A/Sca-1 in their processing and glycosylphosphatidylinositol anchoring to the cell ***,these studies unveil a novel human gene encoding a candidate biomarker and provide an interesting model gene for studying gene regulatory and evolutionary mechanisms.

关键词： LU domain-containing protein family novel human gene LY6A pituitary tumor biomarker nonsynonymous SNP GPI-anchored protein

电针夹脊穴联合润肌丹油外用治疗糖尿病足溃疡疗效观察

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现代中西医结合杂志 2024年第6期33卷 762-766,771页

作者：林权盖利利徐春辉夏联恒顾召王婷萱高杰黑龙江中医药大学黑龙江哈尔滨150040 北京中医药大学深圳医院(龙岗) 广东深圳518000 武警黑龙江总队医院黑龙江哈尔滨150076 黑龙江中医药大学附属第一医院黑龙江哈尔滨150040

目的观察电针夹脊穴联合润肌丹油外用治疗糖尿病足溃疡的临床疗效。方法选取2022年8月—2023年8月黑龙江中医药大学附属第一医院收治的糖尿病足溃疡患者60例,以随机数字表法将其随机分为对照组和治疗组各30例。对照组予以基础治疗和康... 详细信息

目的观察电针夹脊穴联合润肌丹油外用治疗糖尿病足溃疡的临床疗效。方法选取2022年8月—2023年8月黑龙江中医药大学附属第一医院收治的糖尿病足溃疡患者60例,以随机数字表法将其随机分为对照组和治疗组各30例。对照组予以基础治疗和康复新液纱布换药,治疗组予基础治疗及电针腰部夹脊穴和润肌丹油纱布换药治疗,2组均以7 d为1个疗程,治疗28 d。比较2组治疗前后创面总面积、踝肱指数(ABI)、血白细胞计数、中医证候积分及临床疗效。结果与治疗前比较,治疗后2组患者创面总面积均明显缩小(P均<0.05),ABI均明显升高(P均<0.05),血白细胞计数及中医证候积分均明显降低(P均<0.05),治疗组各指标改善情况均明显优于对照组(P均<0.05)。治疗28 d后,治疗组总有效率为93.3%(28/30),明显高于对照组的73.7%(22/30),差异有统计学意义(P<0.05)。结论电针夹脊穴联合润肌丹油外用治疗糖尿病足溃疡效果更好,能明显改善肢体缺血,更好地促进创面愈合。

关键词：电针夹脊穴润肌丹油糖尿病足溃疡

维普期刊数据库博看期刊

Development of MoS_(2)-stainless steel catalyst by 3D printing for efficient destruction of organics via peroxymonosulfate activation

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Journal of Environmental Sciences 2024年第1期135卷 108-117页

作者： Yufeng Liu Jianhui xu Xin Fu Pengxu Wang Dan Li Yunfei Zhang Shenggui Chen chunhui Zhang Peng Liu School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China School of Art and Design Guangzhou Panyu PolytechnicGuangzhou 511483China Dongguan Institute of Science and Technology Innovation Dongguan University of TechnologyDongguan 523808China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Herein,a novel MoS_(2)-stainless steel composite material was first synthetized via a 3D printing method(3DP MoS_(2)-SS)for peroxymonosulfate(PMS)activation and organics *** with MoS_(2)-SS powder/PMS system(0.37 g/(m^(2)/min)),4.3-fold higher k_(FLO)/S_(BET)value was obtained in 3DP MoS_(2)-SS/PMS system(1.60 g/(m^(2)/min),resulting from the superior utilization of active *** observed that 3DP MoS_(2)-SS significantly outperformed the 3DP SS due to the enhanced electron transfer rate and increased active ***,Mo^(4+)facilitated the Fe^(2+)/Fe^(3+)cycle,resulting in the rapid degradation of florfenicol(FLO).Quenching experiments and electron paramagnetic resonance spectra indicated that·OH,SO_(4)·^(-),O_(2)·^(-)and^(1)O_(2)were involved in the degradation of *** effect of influencing factors on the degradation of FLO were evaluated,and the optimized degradation efficiency of 98.69%was achieved at 1 mM PMS and pH of *** degradation products were detected by UPLC/MS analyses and several possible degradation pathways were proposed to be the cleavage of C-N bonds,dechlorination,hydrolysis,defluorination and *** addition,3DP MoS_(2)-SS/PMS system also demonstrated superior degradation performance for 2-chlorophenol,acetaminophen,ibuprofen and *** study provided deep insights into the MoS_(2)-SS catalyst prepared by 3DP technology for PMS activation and FLO-polluted water treatment.

关键词： 3D printing Stainless steel MoS_(2) Peroxymonosulfate activation Degradation mechanism

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中型煤粉炉运行优化主导因素法的理论分析

清华大学学报（自然科学版） 2000年第11期40卷 47-50页

作者：徐春晖徐向东清华大学热能工程系北京100084

针对目前中型煤粉炉计算机控制系统在送风控制回路上的缺点 (即采用固定的烟气含氧量范围作为控制目标 ) ,提出了主导因素法。该方法中 ,送风控制的目标——烟气含氧量是一个变化的指标 ,它不断地由优化算法得出。优化的判据是热效率判... 详细信息

针对目前中型煤粉炉计算机控制系统在送风控制回路上的缺点 (即采用固定的烟气含氧量范围作为控制目标 ) ,提出了主导因素法。该方法中 ,送风控制的目标——烟气含氧量是一个变化的指标 ,它不断地由优化算法得出。优化的判据是热效率判据。该判据的推导 :从锅炉热效率的反平衡计算和炉膛能量平衡出发 ,并与实际运行数据相结合 ,舍弃了一些次要因素 ,最后得到了在送风量改变时锅炉热效率变化的趋势——热效率判据。在此基础上。

关键词：主导因素法煤粉炉运行优化送风控制热效率

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前馈型神经网络新学习算法的研究

清华大学学报（自然科学版） 1999年第3期39卷 1-3页

作者：徐春晖徐向东清华大学热能工程系

前馈神经网络在非线性系统的建模及控制中有着广阔的应用前景，但是该网络的学习算法—向后传播算法（Ｂａｃｋｐｒｏｐａｇａｔｉｏｎ（ＢＰ）Ａｌｇｏｒｉｔｈｍ）算法存在一些不足。为了提高多层前馈神经网络的学习效率及稳定性，引... 详细信息

前馈神经网络在非线性系统的建模及控制中有着广阔的应用前景，但是该网络的学习算法—向后传播算法（Ｂａｃｋｐｒｏｐａｇａｔｉｏｎ（ＢＰ）Ａｌｇｏｒｉｔｈｍ）算法存在一些不足。为了提高多层前馈神经网络的学习效率及稳定性，引入了非线性最小二乘法。通过与其他学习算法的比较，得出结论：其中用差商近似代替导数的Ｐｏｗｅｌ法是一种高效、快速的学习方法，其学习速率比带动量项的学习率自适应的ＢＰ算法高一个量级，而比ＤａｖｉｄｅｎＦｌｅｔｃｈｅｒＰｏｗｅｌ（ＤＦＰ）、ＢｒｏｙｄｅｎＦｌｅｔｃｈｅｒＧｏｌｄｆａｒｌＳｈａｎｎｏ（ＢＦＧＳ）等变尺度方法以及其他非线性最小二乘法的稳定性要好得多。

关键词：前馈神经网络学习算法最小二乘法神经网络

Recyclable Technology of Thermosetting Resins for High Thermal Conductivity Materials Based on Physical Crushing

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ENERGY & ENVIRONMENTAL MATERIALS 2024年第6期7卷 378-387页

作者： Zhong, An Xie, Congzhen Gou, Bin Zhou, Jiangang xu, Huasong Yu, Song Zhang, Daoming Bi, chunhui Cai, Hangchuan Li, Licheng Wang, Rui South China Univ Technol Sch Elect Power Guangzhou 510641 Peoples R China

Epoxy resin, characterized by prominent mechanical and electric-insulation properties, is the preferred material for packaging power electronic devices. Unfortunately, the efficient recycling and reuse of epoxy materials with thermally cross-linked molecular structures has become a daunting challenge. Here, we propose an economical and operable recycling strategy to regenerate waste epoxy resin into a high-performance material. Different particle size of waste epoxy micro-spheres (100-600 mu m) with core-shell structure is obtained through simple mechanical crushing and boron nitride surface treatment. By using smattering epoxy monomer as an adhesive, an eco-friendly composite material with a "brick-wall structure" can be formed. The continuous boron nitride pathway with efficient thermal conductivity endows eco-friendly composite materials with a preeminent thermal conductivity of 3.71 W m-1 K-1 at a low content of 8.5 vol% h-BN, superior to pure epoxy resin (0.21 W m-1 K-1). The composite, after secondary recycling and reuse, still maintains a thermal conductivity of 2.12 W m-1 K-1 and has mechanical and insulation properties comparable to the new epoxy resin (energy storage modulus of 2326.3 MPa and breakdown strength of 40.18 kV mm-1). This strategy expands the sustainable application prospects of thermosetting polymers, offering extremely high economic and environmental value. This manuscript reports the strategy to recycle waste epoxy resins into high thermal conductivity epoxy composites with brick-wall topology based on the physical recycling method. The ultralow content of BN (e.g., 8.5 vol%) endows the composite with record thermal conductivity of 3.71 W m-1 K-1 at the same volume fraction level. image

关键词： brick-wall structure epoxy thermosetting physical recycling thermal management DIELECTRIC-PROPERTIES EPOXY COMPOSITES WASTE MANAGEMENT PLASTICS NANOCOMPOSITE POLYMERS