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High-efficiency dielectric capacitors based on BaTi_(0.5)Hf_(0.5)O_(3) films

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Rare Metals 2023年第8期42卷 2545-2551页

作者： Yan lin Fei li zhen li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Electronic Materials Research Lab Key Lab of Education Ministry and State Key Laboratory for Mechanical Behavior of MaterialsSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China

Film dielectric capacitors enabled with large breakdown field strength and high energy density play a key role for compact and integrated power ***,the energy storage efficiency is always sacrificed as we tried to increase the energy *** trade-off between energy density and efficiency means significant energy dissipation and thermal effects,which will lead to a deterioration ofthe reliability and lifetime of the dielectric capacitors.

关键词： dielectric lifetime energy

Molecular Uniting Set Identified Characteristic(MUSIC)of Organic Optoelectronic Material

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Chinese Journal of Chemistry 2022年第19期40卷 2356-2370页

作者： Arui Huang Qianqian li zhen li Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Sauvage Center for Molecular SciencesDepartment of ChemistryWuhan UniversityWuhanHubei430072 China Institute of Molecular Aggregation Science Tianjin UniversityTianjin300072 China

Researchers investigated the organic optoelectronic materials and facilitated their development in organic light-emitting diodes(OLEDs),chemo-and biosensors,organic solar cells,data storage,and anticounterfeiting *** make up molecules through chemical bonds,and molecular aggregates are formed through weak intermolecular *** opto-electronic performance of these materials depends on not only the properties of the well-designed molecules with specific function groups,but also their aggregate *** molecular aggregates in the form of nanoparticles can be applied in biological imaging,and films can be applied to photovoltaic and photodeformable devices,in which,the alignment of optoelectronic molecules can be either an ordered crystalline or an amorphous ***,the crystalline materials could be deeply investigated by single crystal/powder X-ray diffraction analysis,which could provide the accurate information about molecular conformations,interactions and packing *** afforded a convenient way to investigate the possible relationship between molecular aggregates and opto-electronic *** various opto-electronic materials,organic room temperature phosphorescence(RTP)materials exhibit the extremely sensitive luminescence property to molecular aggregates,even the dynamic properties can be detected by the tiny change of molecular ***,we selected the organic RTP emission as the output information of molecular aggregates,and afforded typical examples to find the possible relation between RTP effect and molecular ***,molecular packing can be adjusted by the external force as light,mechanical force,temperature,electric field,and so on,as well as the molecular structures as the building blocks,and the systematic investigation in the dynamic and static aggregation structures is of great value to the design of various optoelectronic *** review discusses the relationship among molec

关键词： Aggregation Structure-activity relationships Room temperature phosphorescence Organic opto-electronic material Substituent effects

3′-Daidzein sulfonate sodium protects against memory impairment and hippocampal damage caused by chronic cerebral hypoperfusion

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Neural Regeneration Research 2018年第9期13卷 1561-1567页

作者： Xiao li Rui-zhen liu Qi Zeng Zhi-Hua Huang Jian-Dong Zhang zong-liang liu Jing Zeng Hai Xiao Gannan Medical University Ganzhou Jiangxi Province China Department of Ultrasound First Affiliated Hospital of Gannan Medical University Ganzhou liangxi Province China Department of Pathology First Affiliated Hospital of Gannan Medical University Ganzhou Jiangxi Province China

3′-Daidzein sulfonate sodium（DSS） is a new synthetic water-soluble compound derived from daidzein,a soya isoflavone that plays regulatory roles in *** this study,we hypothesized that the regulatory role of DSS in neurobiology exhibits therapeutic effects on hippocampal damage and memory *** validate this hypothesis,we established rat models of chronic cerebral hypoperfusion（CCH） by the permanent occlusion of the common carotid arteries using the two-vessel occlusion *** weeks after modeling,rat models were intragastrically administered 0.1,0.2,and 0.4 mg/kg DSS,once a day,for 5 successive *** Morris water maze test was performed to investigate CCH-induced learning and memory *** assay was used to analyze apoptosis in the hippocampal CA1,CA3 regions and dentate ***-eosin staining was performed to observe the morphology of neurons in the hippocampal CA1,CA3 regions and dentate *** blot analysis was performed to investigate the phosphorylation of PKA,ERK1/2 and CREB in the hippocampal PKA/ERK1/2/CREB signaling *** showed that DSS treatment greatly improved the learning and memory deficits of rats with CCH,reduced apoptosis of neurons in the hippocampal CA1,CA3 regions and dentate gyrus,and increased the phosphorylation of PKA,ERK1/2,and CREB in the *** findings suggest that DSS protects against CCH-induced memory impairment and hippocampal damage possibly through activating the PKA/ERK1/2/CREB signaling pathway.

关键词： nerve regeneration learning and memory deficits chronic cerebral hypoperfusion 3'-daidzein sulfonate sodium PKAIERK1/2/CREB signaling pathway neuroprotection hippocampus neural regeneration

Effects of different Ca^(2+) behavior patterns in the electric field on membrane fouling formation and removal of trace organic compounds

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Journal of Environmental Sciences 2022年第1期34卷 292-300页

作者： zhen Du Min Ji Ruying li School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China

The effects of Ca^(2+) on membrane fouling and trace organic compounds(TrOCs)removal in an electric field-assisted microfiltration system were investigated in the presence of Na^(+) alone for *** the electric field,negatively charged bovine serum albumin(BSA)migrated towards the anode far away from the membrane surface,resulting in a 42.9%transmembrane pressure(TMP)reduction in the presence of Na^(+) at 1.5 *** contrast,because of the stronger charge shielding of Ca^(2+),the electrophoretic migration of BSA was limited and led to a neglectable effect of the electric field(1.5 V)on membrane ***,under 3 V applied voltage,the synergistic effects of electrochemical oxidation and bridging interaction between Ca^(2+) and BSA promoted the formation of denser settleable flocs and a thinner porous cake layer,which alleviated membrane fouling with a 64.5%decrease in TMP and nearly 100%BSA *** Tr OCs elimination increased with voltage and reached29.4%–80.4%at 3 *** electric field could prolong the contact between Tr OCs and strong oxidants generated on the anode,which enhanced the Tr OCs ***,a stronger charge shielding ability of Ca^(2+) weakened the electric field force and thus lowered the Tr OCs removal.

关键词： Electric field Membrane fouling Ca^(2+) Flocs formation Trace organic compounds

Testing High-Dimensional Nonparametric Behrens-Fisher Problem

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Journal of Systems Science & Complexity 2022年第3期35卷 1098-1115页

作者： MENG zhen li Na YUAN Ao Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Biostatistics Bioinformatics and BiomathematicsGeorgetown UniversityWashington 20057USA

For high-dimensional nonparametric Behrens-Fisher problem in which the data dimension is larger than the sample size,the authors propose two test statistics in which one is U-statistic Rankbased Test(URT)and another is Cauchy Combination Test(CCT).CCT is analogous to the maximumtype test,while URT takes into account the sum of squares of differences of ranked samples in different dimensions,which is free of shapes of distributions and robust to *** asymptotic distribution of URT is derived and the closed form for calculating the statistical significance of CCT is *** simulation studies are conducted to evaluate the finite sample power performance of the statistics by comparing with the existing *** simulation results show that our URT is robust and powerful method,meanwhile,its practicability and effectiveness can be illustrated by an application to the gene expression data.

关键词： Cauchy combination test nonparametric Behrens-Fisher problem rank-based test U-statistic

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Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution

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Journal of Bionic Engineering 2022年第1期19卷 113-125页

作者： Haoyang li Yanling Tian zhen Yang School of Mechanical Engineering Tianjin UniversityTianjin300350China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong Kong999077China

Great attention has been focused on super-hydrophobic surfaces due to their fantastic *** chemicals are widely used to fabricate super-hydrophobic surfaces due to their convenience,simplicity,and high *** research has made extensively efforts on corrosion resistance of fluorinated super-hydrophobic surfaces in corrosive ***,rare papers focused on the underlying reasons of anticorrosion property and stability mechanism on the fluorinated super-hydrophobic coatings in alkaline ***,this work aims to reveal these mechanisms of fluorinated super-hydrophobic copper samples in strong alkaline solution(pH 13).Through the characterization of surface wettability and surface morphology,the laser-induced super-hydrophobic surface retained excellent stability after soaking in alkaline solution for 4 *** measurement of chemical compositions,the anticorrosion mechanism and stability mechanism of the fluorinated super-hydrophobic surface were ***,the hydroxyl ion(OH−)can further promote the hydrolysis reaction to improve the density and bonding strength of the fluoride ***,the electrochemical experiments(PDP and EIS tests)were conducted to validate the rationality of our proposed conclusions.

关键词： Fluoride Laser Super-hydrophobicity Alkaline corrosion Stability mechanism

Rabbit model of radiation-induced lung injury

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Asian Pacific Journal of Tropical Medicine 2013年第3期6卷 237-241页

作者： zhen-zong Du Hua Ren Jian-Fei Song li-Fei Zhang Feng lin Hai-Yong Wang Cardio-Thoracic Surgery Affiliated Hospital of Guilin Medical University Cardio-Thoracic Surgery Peking Union Medical College Hospital

Objective:To explore the feasibility of establishing an animal model of chronic radiationinduced lung ***:Twenty-eight New Zealand white rabbits were randomly divided into 3 groups(the right lung irradiation group,the whole lung irradiation group and the control group).Animal model of radiation-induced lung injury was established b) highdoes radiotherapy in the irradiation groups,then all rabbits underwent CT and pathological examinations at 1.***.4.8.12.16 weeks,respectively after ***:Within 4 weeks of irradiation,some rabbits in the right lung irradiation group and whole lung irradiation group died. CT and pathological examinations all showed acute radiation *** 8-12 weeks after irradiation,CT scanning showed ground glass samples signs,patchy shadows and fibrotic stripes. Pathological examination showed the fibrosis pulmonary alveolar wall thickened obviously. Conclusions:The clinical animal model of chronic radiation-induced lung injury which corresponds to practical conditions in clinic can be successfully established.

关键词： New Zealand rabbit Chronic radiation-induced injury Model

Research progress on seismic imaging technology

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Petroleum Science 2022年第1期19卷 128-146页

作者： zhen-Chun li Ying-Ming Qu School of Geosciences China University of PetroleumQingdaoShandong266580China Shandong Provincial Key Laboratory of Deep Oil&Gas China University of PetroleumQingdaoShandong266580China

High-precision seismic imaging is the core task of seismic exploration,guaranteeing the accuracy of geophysical and geological *** the development of seismic exploration,the targets become more and more *** on complex media such as subsalt,small-scale,steeply dipping and surface topography structures brings a great challenge to imaging ***,the seismic imaging methods range from stacking-to migration-to inversion-based imaging,and the imaging accuracy is becoming increasingly *** review paper includes:summarizing the development of the seismic imaging;overviewing the principles of three typical imaging methods,including common reflection surface(CRS)stack,migration-based Gaussian-beam migration(GBM)and reverse-time migration(RTM),and inversion-based least-squares reverse-time migration(LSRTM);analyzing the imaging capability of GBM,RTM and LSRTM to the special structures on three typical models and a land data set;outlooking the future perspectives of imaging *** main challenge of seismic imaging is to produce high-precision images for low-quality data,extremely deep reservoirs,and dual-complex structures.

关键词： Common reflection surface stack Gaussian-beam migration Reverse-time migration Least-squares reverse-time migration

Formation and Compression Behavior of Two-Phase Bulk Metallic Glasses with a Minor Addition of Aluminum

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Chinese Physics Letters 2011年第3期28卷 148-151页

作者： zong Hai-Tao MA Ming-zhen ZHANG Xin-Yu QI li li Gong JING Qin liU Ri-Ping State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004 College of Physics and Chemistry Henan Polytechnic UniversityJiaozuo 454000

A remarkable enhancement in room-temperature compressive deformability is realized by the minor-addition of 1.5 at.%Al in ZrTi-based bulk metallic *** amorphous phases are observed by transmission electron microscopy in the Al-containing alloys and this explains the improvement of compression *** studies suggest that phase separation might occur in glass forming alloys with a negative enthalpy of mixing.

关键词： alloys enthalpy amorphous