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Supersymmetry and Solution of Dirac Equation with Vector and Scalar Potentials

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Communications in Theoretical Physics 2008年第2期49卷 319-326页

作者： JU Guo-xing ren Zhong-Zhou Department of Physics Nanjing University Nanjing 210093 China

The Dirac equations with vector and scalar potentials of the Coulomb types in two and three dimensions are solved using the supersymmetric quantum mechanics method. For the system of such potentials, the analytical ex... 详细信息

关键词： Dirac equation vector potential scalar potential supersymmetry matrix element

A relative quantitative method to detect OCT4A gene expression by exon-junction primer and locked nucleic acid-modified probe

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第2期12卷 149-155页

作者： Jian-jun ren xing-kai MENG Department of General Surgery Xuanwu Hospital Capital Medical University Beijing 100053 China Department of General Surgery Affiliated Hospital of Inner Mongolia Medical College Hohhot 010050 China

Objective: OCT4A has been known to play a critical role in the maintenance of pluripotency of embryonic stem cells. Recent research has shown that OCT4A is also expressed in partial tumor cell lines and tissues. This study is aimed to develop a real-time reverse transcriptase polymerase chain reaction (RT-PCR) assay for relative quantitative detection of OCT4A mRNA and discrimination from OCT4B, pseudogene, and genomic contaminations. Methods: A locked nucleic acid (LNA)-modified probe was designed to discern the single base difference 352A/C to identify OCT4A mRNA. An exon-junction primer was designed to avoid false positive caused by genomic contaminations. In addition, a house keeping gene glyceraldehyde-3-phosphate dehydrogenase (GAPDH) was measured in parallel to normalize the differences between samples and operations. Results: Experiments showed that the newly established RT-PCR assay amplified the OCT4A mRNA selectively; OCT4A analogues gave negative signals. Cell lines nTERA-2 and HepG2 showed positive results in OCT4A expression, while for HeLa and 293 cell lines, as well as primary peripheral blood mononuclear cells (PBMCs), OCT4A expression was negative. Additionally, the relative quantity of OCT4A mRNA was calculated by cycle threshold (Ct) method and house keeping gene normalization. Conclusions: This technique proved to be effective for relative quantitation of OCT4A mRNA with high specificity.

关键词： OCT4A. Locked nucleic acid (LNA). Real-time Dolvmerase chain reaction (PCR)

Solution‑Processed Thin Film Transparent Photovoltaics:Present Challenges and Future Development

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Nano-Micro Letters 2025年第2期17卷 566-600页

作者： Tianle Liu Munerah M.S.Almutairi Jie Ma Aisling Stewart Zhaohui xing Mengxia Liu Bo Hou Yuljae Cho UM-SJTU Joint Institute Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Physics and Astronomy Cardiff UniversityCardiff CF243AAWalesUK Department of Electrical and Computer Engineering Yale UniversityNew HavenCT 06511USA Energy Sciences Institute Yale UniversityWest HavenCT 06516USA Future Photovoltaics Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Electrical energy is essential for modern society to sustain economic *** soaring demand for the electrical energy,together with an awareness of the environmental impact of fossil fuels,has been driving a shift towards the utilization of solar ***,traditional solar energy solutions often require extensive spaces for a panel installation,limiting their practicality in a dense urban *** overcome the spatial constraint,researchers have developed transparent photovoltaics(TPV),enabling windows and facades in vehicles and buildings to generate electric *** TPV advancements are focused on improving both transparency and power output to rival commercially available silicon solar *** this review,we first briefly introduce wavelength-and non-wavelengthselective strategies to achieve *** of merit and theoretical limits of TPVs are discussed to comprehensively understand the status of current TPV *** we highlight recent progress in different types of TPVs,with a particular focus on solution-processed thin-film photovoltaics(PVs),including colloidal quantum dot PVs,metal halide perovskite PVs and organic *** applications of TPVs are also reviewed,with emphasis on agrivoltaics,smart windows and ***,current challenges and future opportunities in TPV research are pointed out.

关键词： Transparent semiconductors Solution-processable transparent solar cell Emerging solar cell materials Buildingintegrated photovoltaics

Geometric edge effect on the interface of Au/CeO_(2)nanocatalysts for CO oxidation

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Nano Research 2024年第6期17卷 4986-4993页

作者： Hongpeng LiuZhongliang Cao Siyuan Yang Qingye ren Zejian Dong wei Liu Zi-An Li xing Chen Langli Luo Institute of Molecular Plus Tianjin UniversityTianjin 300072China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics(DICP)Chinese Academy of SciencesDalian 116023China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures and School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The oxide supports play a crucial role in anchoring and promoting the active metal species by geometric confinement and chemical *** design and synthesis of the well-defined oxide support with specific morphology such as size,shape,and exposed facets have attracted extensive research efforts,which directly reflects on their catalytic *** this study,using an Au/CeO_(2)-nanorod model catalyst,we demonstrate an edge effect on the Au/CeO_(2)interfacial structure,which shows a prominent effect on the structure-performance relationship in the CO oxidation *** specific“edge-interface”structure features an“edge-on”Au nanoparticles position on rod-shaped CeO_(2)support,confirmed by atomic-scale electron microscopy characterization,which introduces additional degrees of freedom in coordination environment,chemical state,bond length,and *** with theocratical calculations and in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)investigations,we confirmed that this“edge-interface”has distinct adsorption properties due to the change of O vacancy formation energy as well as the chemical states of Au resulting from the electron transfer and redistribution between the metal and the *** results demonstrate a non-conventional geometric effect of rod-shaped supported metal catalysts on the catalytic performance,which could provide insights into the atomic-precise utilization of catalysts.

关键词： ceria nanorod supported catalyst edge-effect atomic scale

Reduced mesencephalic astrocyte-derived neurotrophic factor expression by mutant androgen receptor contributes to neurodegeneration in a model of spinal and bulbar muscular atrophy pathology

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Neural Regeneration Research 2025年第9期20卷 2655-2666页

作者： Yiyang Qin Wenzhen Zhu Tingting Guo Yiran Zhang Tingting xing Peng Yin Shihua Li Xiao-Jiang Li Su Yang Guangdong Key Laboratory of Non-human Primate Research Key Laboratory of CNS Regeneration(Ministry of Education)Guangdong–HongKong–Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina

Spinal and bulbar muscular atrophy is a neurodegenerative disease caused by extended CAG trinucleotide repeats in the androgen receptor gene,which encodes a ligand-dependent transcription facto *** mutant androgen receptor protein,characterized by polyglutamine expansion,is prone to misfolding and forms aggregates in both the nucleus and cytoplasm in the brain in spinal and bulbar muscular atrophy *** aggregates alter protein-protein interactions and compromise transcriptional *** this study,we reported that in both cultured N2a cells and mouse brain,mutant androgen receptor with polyglutamine expansion causes reduced expression of mesencephalic astrocyte-de rived neurotrophic *** n of mesencephalic astrocyte-derived neurotrophic factor amelio rated the neurotoxicity of mutant androgen receptor through the inhibition of mutant androgen receptor *** down endogenous mesencephalic astrocyte-derived neurotrophic factor in the mouse brain exacerbated neuronal damage and mutant androgen receptor *** findings suggest that inhibition of mesencephalic astrocyte-derived neurotrophic factor expression by mutant androgen receptor is a potential mechanism underlying neurodegeneration in spinal and bulbar muscular atrophy.

关键词： androgen receptor mesencephalic astrocyte-derived neurotrophic factor mouse model neurodegeneration neuronal loss neurotrophic factor polyglutamine disease protein misfolding spinal and bulbar muscular atrophy transcription factor

Parametric Study on the Behavior of An Innovative Subsurface Tension Leg Platform in Ultra-Deep Water

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China Ocean Engineering 2017年第5期31卷 589-597页

作者： ZHEN xing-wei HUANG Yi School of Naval Architecture and Ocean Engineering Dalian University of Technology

This study focuses on a new technology of Subsurface Tension Leg Platform （STLP）, which utilizes the shallow- water rated well completion equipment and technology for the development of large oil and gas fields in ultra-deep water （UDW）. Thus, the STLP concept offers attractive advantages over conventional field development concepts. STLP is basically a pre-installed Subsurface Sea-star Platform （SSP）, which supports rigid risers and shallow-water rated well completion equipment. The paper details the results of the parametric study on the behavior of STLP at a water depth of 3000 m. At first, a general description of the STLP configuration and working principle is introduced. Then, the numerical models for the global analysis of the STLP in waves and current are presented. After that, extensive parametric studies are carried out with regarding to SSP/tethers system analysis, global dynamic analysis and riser interference analysis. Critical points are addressed on the mooring pattern and riser arrangement under the influence of ocean current, to ensure that the requirements on SSP stability and riser interference are well satisfied. Finally, conclusions and discussions are made. The results indicate that STLP is a competitive well and riser solution in up to 3000 m water depth for offshore petroleum production.

关键词： subsurface tension leg platform parametric study global behavior ultra-deep water

Structure characterization and grinding performance of gas-quenched steel slag abrasive

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Journal of Iron and Steel Research International 2021年第4期28卷 383-390页

作者： Jing-jing Pei Jin-hu Wu Wen-qing Huo Yu-zhu Zhang Hong-wei xing Qian-qian ren College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina

Gas-quenched steel slag abrasive was obtained by gas quenching with high-temperature liquid steel slag as raw *** phase composition,thermal properties,micromorphology,magnetic properties,and mechanical properties of the par-ticles were characterized by using an X-ray diffractometer,a differential thermal analyzer,a scanning electron microscope,a magnetic property meter,and a compressive strength tester,*** show that the gas-quenched steel slag abrasive is a monodisperse regular *** compressive strength of a single particle is 34 *** product is ferromag-netic and has good thermal *** micromorphology and flatness of the workpiece before and after grinding with the gas-quenched steel slag abrasive were measured using a three-dimensional *** reveal that the surface roughness of the workpiece is reduced to 1.526,0.623,and 0.227μm after grinding for 5,10,and 20 min,*** surface profile fluctuation decreases to±1.0μ***,the workpiece surface tends to be flat without obvious scratches.

关键词： Gas-quenched steel slag abrasive Thermal property Magnetic property Compressive strength Surface roughness Micromorphology

Influence of Electropulsing Pretreatment on Solid-State Graphitization of Spherical Graphite Iron

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Journal of Iron and Steel Research International 2012年第12期19卷 66-72页

作者： LI Qing-chun LI ren-xing LIN Da-shuai CHANG Guo-wei ZHAI Qi-jie School of Materials Science and Engineering Liaoning University of Technology Jinzhou 121000 Liaoning China Shanghai Key Laboratory of Modern Metallurgy and Materials Processing Shanghai 200072 China

The solid-state graphitization process of spherical graphite iron after electropulsing pretreatment was ob- served in-situ by using a high-temperature confocal scanning laser microscope （HTCSLM）. The influence of electro- pulsing pretreatment on the decomposition of cementite and the formation of graphite during the solid-state graphiti- zation was studied. The result indicates that the electropulsing pretreatment can accelerate the decomposition of ce mentite, and make more neonatal graphite in small size be formed near the cementite. The neonatal graphite nucle ates and grows chiefly at the temperature range of 800 to 850 ℃, and the average growth rate of neonatal graphite is 0. 034 μm2/s during the heating process. For the spherical graphite iron after normal and electropulsing pretreat- ment, the decomposition rate of cementite during the heating process is 0.16 and 0.24 μm2/s, respectively. Analy- sis shows that the electropulsing pretreatment promotes the dislocation accumulation near the cementite, conse- quently, the decomposition of cementite and the formation of neonatal graphite is accelerated during the solid-state graphitization.

关键词： pulse current spherical graphite iron graphitization cementite in-situ observation

High-performance anisotropic SmCo-based magnet with novel microstructure

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Journal of Rare Earths 2024年第8期42卷 1539-1545,I0005页

作者： Yingchang Li Zicao xing Nengjun Yu Zesong ren Minxiang Pan Qiong Wu Hongliang Ge Minggang Zhu wei Li College of Materials and Chemistry China jiliang UniversityHangzhou 310018China Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing 100081China

A novel micro structure of magnetically anisotropic Sm Co-based magnet with high-performance is *** magnet consists of SmCo_(7)-H(TbCu_(7)-hexagonal type),Sm_(2)Co_(17)-H(Th_(2)Ni_(17)-hexagonal type)and SmCo_(3)-R(SmCo_(3)-rhombohedral type)*** maximum magnetic energy product of the magnet is 231.69 kj/m^(3),and the intrinsic coercivity is 1005.47 kA/*** outstanding intrinsic coercivity temperature coefficient(β)of-0.125%/K between 298 and 773 K is obtained,which is very close to theβof commercial high-temperature Sm_(2)Co_(17)-based sintered *** initial magnetization curve indicates that the coercivity mechanism is controlled by a domain wall pinning *** SmCo_(3)-R lamellar phase may be a potential pinning center or self-pinning *** microstructure of the magnet is different from that of any previous SmCo-based *** findings provide a new idea for preparing high-performance SmCo-based permanent magnets.

关键词： Rare earths Permanent magnet Composite magnet Melt-spinning Microstructure