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Science China(Life Sciences) 2024年第5期67卷 1027-1034页

作者： Xiaolong Qi Lu Zhang Qiulin Zhao Peng Zhou Sai Xian Zhang Jingjin Li Zhuqing Zheng Yue Xiang xueting dai Zhe Jin Yaobang Jian Xinyun Li Liangliang Fu Shuhong Zhao Key Lab of Agricultural Animal Genetics Breeding and Reproduction of Ministry of Education and Key Laboratory of Swine Genetics and Breeding of Ministry of AgricultureCollege of Animal Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China The Cooperative Innovation Center for Sustainable Pig Production Wuhan 430070China Hubei Hongshan Laboratory Frontiers Science Center for Animal Breeding and Sustainable ProductionWuhan 430070China

Protein-mediated chromatin interactions can be revealed by coupling proximity-based ligation with chromatin ***,these techniques require complex experimental procedures and millions of cells per experiment,which limits their widespread application in life science ***,we develop a novel method,Hi-Tag,that identifies high-resolution,long-range chromatin interactions through transposase tagmentation and chromatin proximity ligation(with a phosphorothioate-modified linker).Hi-Tag can be implemented using as few as 100,000 cells,involving simple experimental procedures that can be completed within 1.5 ***,Hi-Tag is capable of using its own data to identify the binding sites of specific proteins,based on which,it can acquire accurate interaction *** results suggest that Hi-Tag has great potential for advancing chromatin interaction studies,particularly in the context of limited cell availability.

关键词： Hi-Tag chromatin interactions transposase tagmentation chromatin proximity ligation low cell numbers

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基于光伏充电的低压混合式断路器设计及仿真

南方电网技术 2024年第4期18卷 10-18,40页

作者：孔令哲何柏娜李辉刘雨佳边晨曦娄辉戴雪婷刘洋山东理工大学电气与电子工程学院山东淄博255000 中国电力科学研究院有限公司武汉430000

直流断路器是实现直流系统电流故障清除和隔离的关键设备。基于人工过零点的直流断路器熄弧时刻具有不确定性,且换流电容需要更换辅助电源,降低断路器可靠性,增加维护成本。为此,在传统直流断路器基础上,提出了一种基于光伏充电的混合... 详细信息

直流断路器是实现直流系统电流故障清除和隔离的关键设备。基于人工过零点的直流断路器熄弧时刻具有不确定性,且换流电容需要更换辅助电源,降低断路器可靠性,增加维护成本。为此,在传统直流断路器基础上,提出了一种基于光伏充电的混合式直流断路器拓扑结构设计方案。该方案在断路器过零点未熄弧时闭锁IGBT开关,加速电弧熄灭,并设计光伏储能供电系统为换流电容预充电能,以保障断路器持续运行。同时对所提断路器的拓扑结构、开断时序、拓扑参数进行了设计,基于MATLAB/Simulink实验平台建立了150 V混合式直流断路器模型,讨论IGBT开关器件闭锁时刻及电阻电容二极管(resistance-capacitance diode,RCD)缓冲电路对断路器开断的影响。在此基础上,通过仿真实验分析了正常和短路工况下断路器开断过程,验证了所提方案的可行性。

关键词：混合式直流断路器人工过零点拓扑结构 IGBT开关 RCD缓冲电路光伏供电系统

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低压直流断路器拓扑参数对燃弧时长影响研究

南方电网技术 2024年第2期18卷 39-46页

作者：孔令哲何柏娜李辉娄辉边晨曦孟凡涛戴雪婷刘雨佳山东理工大学电气与电子工程学院山东淄博255000 中国电力科学研究院有限公司武汉430000

基于LC振荡换流的机械式直流断路器能够抑制开断电弧,可靠切除故障线路,保障系统安全运行。为分析机械式直流断路器拓扑参数对其开断的影响,基于人工过零点抑弧原理,在MATLAB/Simulink中搭建直流断路器仿真模型,分析不同模型下电弧抑制... 详细信息

基于LC振荡换流的机械式直流断路器能够抑制开断电弧,可靠切除故障线路,保障系统安全运行。为分析机械式直流断路器拓扑参数对其开断的影响,基于人工过零点抑弧原理,在MATLAB/Simulink中搭建直流断路器仿真模型,分析不同模型下电弧抑制效果。在此基础上,针对断路器不同换流方式下的拓扑参数进行电弧抑制仿真,讨论可控参数与不可控参数对燃弧时长的影响。仿真结果表明,在强制振荡与自激振荡换流方式下可控参数对燃弧时长的影响不同,电弧时间常数、电弧散热功率等不可控参数对燃弧时长影响相同。该研究成果可为直流断路器抑弧拓扑设计提供有效参考。

关键词：直流断路器电弧模型振荡电路强制振荡自激振荡燃弧时长

Outer-surface Covering of Nanochannels with Hydrogel for Highly Sensitive and Specific Cr(VI)Detection Through Analyte-caused Charge Change in Hydrogel

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Chemical Research in Chinese Universities 2024年第2期40卷 326-332页

作者： LIU Huan SUN xueting dai Yu ZHANG Xiaojin XIA Fan Faculty of Materials Science and Chemistry China University of GeosciencesWuhan430074P.R.China

Nanochannels have made great progress and are a promising platform for detecting a series of ***,most nanochannels are modified on the inner wall,while ignoring the outer ***,we modified the outer surface of nanochannels with *** from other reported outer-surface modification methods,we directly cover nanochannels with hydrogel to form heterogeneous *** selected hydrogel hardly adsorbs other ions and shows specific adsorption for Cr(VI).The adsorption sites in hydrogel are homogeneous,and Cr(VI)adsorption onto hydrogel is endothermic and *** charge in hydrogel changes after Cr(VI)adsorption,and the resulting current changes can be used for the detection of Cr(VI)with the detection limit of 10−11 mol/*** platform is expected to be used for Cr(VI)detection in living organisms,especially within *** work provides a new approach for outer-surface modification of nanochannels and offers a new choice for nanochannel detection platforms.

关键词： Nanochannel Hydrogel Heterogeneous membrane Cr(VI)detection

Enhanced Thermoelectric and Mechanical Properties of p-type Bi_(0.5)Sb_(1.5)Te_(3) Bulk Alloys by Composite Electroless Plating with Ni&Cu

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Journal of Wuhan University of Technology(Materials Science) 2022年第5期37卷 1009-1013页

作者：代雪婷 NAN Jian CHENG Qingyuan State-owned Machinery Factory in Wuhu Wuhu241007China

In order to improve the thermoelectric and mechanical properties of p-type Bi_(2)Te_(3) thermoelectric material,Bi_(0.5)Sb_(1.5)Te_(3)/Ni&Cu core/shell powders were electroless plated with the same content of Ni and different content of Cu,and then reduced by hydrogen,and finally sintered into bulk by spark plasma *** composite electroless plating with Ni&Cu,for the bulk sample with 0.3 wt% Ni and 0.15 wt% Cu,the power factor rises significantly and the highest value increases from 25 to 33 μW·cm^(-1)· K^(-2) at room ***,the thermal conductivity decreases to about 0.80 W·m^(-1)·K^(-1) at 623 ***,the composite electroless plating with Ni&Cu can obviously improve the electrical and thermal transport performance of p-type Bi_(2)Te_(3) based thermoelectric ***,the ZT value enhances significantly and the highest value increases over 3 times,from 0.35 to 1.16 at 473 K in Bi_(0.5)Sb_(1.5)Te_(3) with 0.3 wt% Ni and 0.15 wt% Cu bulk *** the same time,the mechanical properties have also been improved after composite electroless plating with Ni&Cu.

关键词： Bi_(2)Te_(3) electroless plating thermoelectric properties mechanical properties

Strain engineering of anisotropic light-matter interactions in onedimensional P-P chain of SiP_(2)

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Nano Research 2022年第8期15卷 7378-7383页

作者： Fanghua Cheng Junwei Huang Feng Qin Ling Zhou xueting dai Xiangyu Bi Caorong Zhang Zeya Li Ming Tang Caiyu Qiu Yangfan Lu Huiyang Gou Hongtao Yuan National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied SciencesNanjing UniversityNanjing 210000China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced Research Beijing 100094China

Strain engineering can serve as a powerful technique for modulating the exotic properties arising from the atomic structure of *** have been demonstrated that one-dimensional(1D)structure can serve as a great platform for modulating electronic band structure and phonon dispersion via strain ***,in a van der Waals material silicon diphosphide(SiP_(2)),quasi-1D zigzag phosphorus–phosphorus(P–P)chains are embedded inside the crystal structure,and can show unique phonon vibration modes and realize quasi-1D *** those optical properties by the atom displacements via strain engineering is of great interest in understanding underlying mechanism of such P–P chains,however,which remains ***,we demonstrate the strain engineering of Raman and photoluminescence(PL)spectra in quasi-1D P–P chains and resulting in anisotropic manipulation in SiP_(2).We find that the phonon frequencies of SiP_(2)in Raman spectra linearly evolve with a uniaxial strain along/perpendicular to the quasi-1D P–P chain ***,by applying tensile strain along the P–P chains,the band gap energy of strained SiP_(2)can significantly decrease with a tunable value of~55 *** on arsenic(As)element doping into SiP_(2),the strain-induced redshifts of phonon frequencies decrease,indicating the stiffening of the phonon vibration with the increased arsenic doping *** results provide an opportunity for strain engineering of the light–matter interactions in the quasi-1D P–P chains of SiP_(2)crystal for potential optical applications.

关键词： strain engineering silicon diphosphide Raman photoluminescence

Selective substitution induced anomalous phonon stiffening within quasi-one-dimensional P–P chains in SiP2

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Nano Research 2023年第1期16卷 1107-1114页

作者： xueting dai Feng Qin Caiyu Qiu Ling Zhou Junwei Huang Fanghua Cheng Xiangyu Bi Caorong Zhang Zeya Li Ming Tang Shengqiang Wu Xiaoxu Zhao Yangfan Lu Huiyang Gou Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China School of Materials Science and Engineering Peking UniversityBeijing 100871China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced Research Beijing 100094China

Light-matter interactions in low-dimensional quantum-confined structures can dominate the optical properties of the materials and lead to optoelectronic *** anisotropic layered silicon diphosphide(SiP2)crystal,the embedded quasi-onedimensional(1D)phosphorus–phosphorus(P–P)chains directly result in an unconventional quasi-1D excitonic state,and a special phonon mode vibrating along the P–P chains,establishing a unique 1D quantum-confined *** SiP2 with the homologous element serves as an effective way to study the properties of these excitons and phonons associated with the quasi-1D P–P chains,as well as the strong interaction between these ***,the experimental observation and the related optical spectral understanding of SiP2 with isoelectronic dopants remain ***,with the photoluminescence and Raman spectroscopy measurements,we demonstrate the redshift of the confined excitonic peak and the stiffening of the phonon vibration mode■of a series of Si(P1−xAsx)2 alloys with increasing arsenic(As)*** anomalous stiffening of■is attributed to the selective substitution of As atoms for P atoms within the P–P chains,which is confirmed via our scanning transmission electron microscopy *** optical spectra evolutions with selective substitution pave a new way to understand the 1D quantum confinement in semiconductors,offering opportunities to explore quasi-1D characteristics in SiP2 and the resulting photonic device application.

关键词： SiP2 quasi-one-dimensional structure Raman photoluminescence phosphide

Atroposelective Synthesis of 3-Aryl-Indoles Through a One-Pot 2,3-Difunctionalization of Simple Indoles

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CCS Chemistry 2024年第7期6卷 1672-1680页

作者： Lei dai Yu-Li Sun Jiami Guo xueting Zhou Qingqin Huang Yixin Lu Department of Chemistry National University of SingaporeSingapore 117543 Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhouFujian350207

Indole and its derivatives represent the most important heterocycles that are widely present in bioactive molecules,natural products and advanced materials,and thus functionalization of simple indoles to construct complex indole derivatives is a research area of great current interest.2,3-Difunctionalization of indoles has been extensively studied,but the reported examples are limited to the synthesis of 2,3-disubstituted indole derivatives or dearomatized products containing central *** now,atroposelective 2,3-difunctionalization of simple indoles for the synthesis of axially chiral molecules is *** this article,we report a straightforward and general strategy for atroposelective 2,3-difunctionalization of simple indoles,forming indole-containing axially chiral products in good yields and excellent *** strategy we introduce herein may lead to the discovery of new approaches for multifunctionalization of indoles and other heterocyclic scaffolds,thus accessing novel axially chiral heteroarene-containing scaffolds that may find applications in medicinal chemistry and asymmetric catalysis.

关键词： axial chirality atroposelectivity sequential catalysis difunctionalization of indoles chiral phosphoric acid

基于有限元迭代计算的盆式绝缘子电场综合优化

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电瓷避雷器 2024年第2期 120-127页

作者：娄辉何柏娜边晨曦刘雨佳孔令哲戴雪婷吴硕孟凡涛刘洋山东理工大学电气与电子工程学院山东淄博255000

盆式绝缘子是高压气体绝缘设备重要的绝缘部件,其性能优劣直接影响高压设备的稳定运行。针对盆式绝缘子,以提升整体电场分布均匀性为优化目标,基于有限元迭代计算的方法,提出盆式绝缘子电场综合优化方案,通过优化算法改变盆体结构和梯... 详细信息

盆式绝缘子是高压气体绝缘设备重要的绝缘部件,其性能优劣直接影响高压设备的稳定运行。针对盆式绝缘子,以提升整体电场分布均匀性为优化目标,基于有限元迭代计算的方法,提出盆式绝缘子电场综合优化方案,通过优化算法改变盆体结构和梯度材料介电常数,得到绝缘子最优电场分布。仿真结果表明,对比匀质盆式绝缘子,在满足机械性能情况下,综合优化后体/表层梯度盆式绝缘子凹凸面最大场强降幅分别为35.79%、30.59%和29.28%、29.51%,优化效果显著。

关键词：高压气体绝缘设备环氧盆式绝缘子迭代计算梯度材料综合优化

国际贸易对中国家庭动态贫困的影响——基于相对贫困的视角

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财贸研究 2022年第10期33卷 18-32页

作者：陈怡戴雪婷南京审计大学经济学院江苏南京211815

基于相对贫困视角,利用中国营养与健康调查数据(CHNS),使用多项Logit模型,实证研究国际贸易对中国家庭动态贫困的影响。结果表明:国际贸易能显著影响中国家庭的动态贫困,既有利于贫困家庭脱贫,也有助于降低非贫困家庭陷贫的风险,且该作... 详细信息

基于相对贫困视角,利用中国营养与健康调查数据(CHNS),使用多项Logit模型,实证研究国际贸易对中国家庭动态贫困的影响。结果表明:国际贸易能显著影响中国家庭的动态贫困,既有利于贫困家庭脱贫,也有助于降低非贫困家庭陷贫的风险,且该作用是通过促进技术进步和就业这两个渠道进行的;国际贸易的减贫效应存在地区差异,相较于沿海地区,国际贸易对内陆地区贫困家庭脱贫促进作用和对非贫困家庭陷贫抑制作用更显著;相较于城镇,国际贸易对农村贫困家庭脱贫促进作用更显著;国际贸易更有助于期初收入最高1/3贫困家庭脱贫,且国际贸易更有助于降低期初收入最低1/3和最高1/3的非贫困家庭陷贫风险。

关键词：国际贸易动态贫困相对贫困马尔科夫转移矩阵

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