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Synergistic effect of bonding heterogeneity and phonon localization in introducing excellent thermoelectric properties in layered heteroanionic NdZnSbO material

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Journal of Energy Chemistry 2025年第1期100卷 259-272页

作者： Da Wan Shuwei Tang Shulin Bai xiaodong li Peng Ai Wanrong Guo Tuo Zheng College of Materials Science and Engineering Liaoning Technical University Faculty of Chemistry Northeast Normal University

Layered rare-earth metal oxides, harnessing the dual properties of oxides and two-dimensional layered materials, exhibit remarkable thermal stability and quantum confinement effects. Therefore, this work adopts the first-principles calculation combined with the Boltzmann transport theory to predict the thermoelectric properties of NdZnSbO compound. The coexistence of weak interlayer van der Waals interactions, robust intralayer ionic bonding, and partial covalent bonding leads to remarkable bonding heterogeneity, which engenders pronounced phonon scattering and imposes constraints on thermal transport along the out-of-plane direction. The weakened chemical bonds induced by the antibonding states, together with the rattling-like behavior of the Zn atom, culminate in the profound anharmonicity in the layered NdZnSbO compound. The weakening bond and heavy element contribute to the softness of phonon modes, which significantly diminishes the phonon group velocity. The redistribution-dominated four-phonon scattering process spans a large optical gap, which effectively reduces the lattice thermal conductivity. The NdZnSbO compound exhibits direct semiconductor characteristic with a bandgap of 0.73 e V by adopting the Heyd-Scuseria-Ernzerhof(HSE06) functional in combination with spin–orbit coupling(SOC) effect. The multi-valley feature of NdZnSbO compound augur favorably for band degeneracy, thus amplifying the power factor. Consequently, an optimal figure-of-merit(ZT) of 3.40 at 900 K is achieved for the n-type NdZnSbO compound. The present study delves deeply insights into the origins for the low thermal conductivity of NdZnSbO compound and proposes an optimization scheme to enhance overall thermoelectric performance.

关键词： Bond strength (chemical)

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丙泊酚致过敏性休克死亡1例

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医药导报 2025年第1期44卷 131-133页

作者：李晓东彭芳杨丹安宁市第一人民医院药学部昆明650300 昆明市药品不良反应与药物滥用监测中心昆明650000

患者,女,48岁,因子宫内节育器取出手术麻醉给予丙泊酚乳状注射液100 mg,静脉注射,发生过敏性休克死亡。采用诺氏评分法判断怀疑药品致过敏性休克死亡相关性,结合相关文献分析丙泊酚导致过敏的作用机制,警戒临床关注丙泊酚的安全性,并为... 详细信息

患者,女,48岁,因子宫内节育器取出手术麻醉给予丙泊酚乳状注射液100 mg,静脉注射,发生过敏性休克死亡。采用诺氏评分法判断怀疑药品致过敏性休克死亡相关性,结合相关文献分析丙泊酚导致过敏的作用机制,警戒临床关注丙泊酚的安全性,并为避免使用丙泊酚出现过敏性休克提出了可行建议。

关键词：丙泊酚过敏性休克死亡药品不良反应

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The Art of Curved Reinforcing in Biological Armors-Seashells

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Journal of Bionic Engineering 2019年第4期16卷 711-718页

作者： Haoze li xiaodong li 1.Department of Mechanical Engineering |University of South Carolina300 Main StreetColumbiaSC 29208USA Department of Mechanical and Aerospace Engineering University of Virginia122 Engineer's WayCharlottesvilleVA 22904USA

Seashells,commonly referred to as nature’s armors against predatory attacks,have been serving as the inspirations for designing strong and tough engineering *** studies on conch shells have been focused on the shell body *** conch spines which are evenly distributed at the tail of conch shell are generally accepted as the decoration,enabling conch shells as art *** we report a new finding that nature uses curved reinforcements,different from the straight ones in conch body parts,to construct conch spines which exhibit 30%increase in fracture strength compared to conch shell body *** curved lamellae not only endow conch spines with pyramid-shape but also add extra shielding to the *** equilibrium state,the curved lamellar configuration withholds 3 times higher loading than the straight *** finding uncovered nature’s wisdom in constructing seashells and provides an additional design guideline for utilizing curved reinforcements to achieve multifunctionalities and superior mechanical prowess.

关键词： conch shell spine composite curved reinforcement hierarchical structure fracture strength

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Theoretical study on photophysical property of C_(60)M(CO)_5 (M=Cr,Mo and W)

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Chinese Science Bulletin 2008年第21期53卷 3281-3286页

作者： li xiaodong College of Chemistry and Environment Science Nanjing Normal University Nanjing 210097 China

Configurations of three η2 models of transition-metal 60 fullerene derivatives C60M(CO)5(M=Cr,Mo and W) have been optimized at B3LYP/LanL2DZ *** the basis of the optimized geometrical structures,their electronic spectra and the frequency dependence of third-order nonlinear optical polarizabilities γ in different optical processes of third-harmonic generation(THG),electric-field-induced sec-ond-harmonic generation(EFISHG) and degenerate four-wave mixing(DFWM) are calculated by using TDB3LYP model based on LanL2DZ level coupled with the SOS(sum-over-state) *** obtained results show that their electronic spectra have a red shift compared with that of 60 fullerene and dif-ferent transition-metal functional groups added to C60 cage may result in different spectrum *** the three studied species,(η2-C60)Mo(CO)5 has the largest third-order nonlinear optical polarizability.

关键词： C60Cr(CO)5 C60Mo(CO)5 C60W(CO)5 电子光谱非线性光学

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Range of applicability of real mode superposition approximation method for seismic response calculation of non-classically damped industrial buildings

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Earthquake Engineering and Engineering Vibration 2022年第2期21卷 475-488页

作者： li xiaodong Sun Hongyang Ji xiaodong Sanjukta Chakraborty Wang lijun Department of Civil Engineering Key Laboratory of Civil Engineering Safety and Durability of China Education MinistryTsinghua UniversityBeijing 100084China Central Research Institute of Building and Construction Co.Ltd Beijing 100088China Department of Civil Engineering Indian Institute of Technology PalakkadKerala 678557India Huachengboyuan Engineering Technology Group Beijing 100052China

An industrial building is a non-classically damped system due to the different damping properties of the primary structure and *** objective of this paper is to quantify the range of applicability of the real model superposition approximation method to the seismic response calculation of industrial *** analysis using lumped mass-and-shear spring models indicates that for the equipment-to-structure frequency ratiosγf>1.1 orγflimited,and the real mode superposition approximation method provides accurate *** 0.9ligible effect on the damping ratios and mode shape vectors of these *** 0.9***,extensive parametric analyses are conducted,where both steel structures and reinforced concrete structures with equipment with various damping ratios are ***,the finite element analysis of a five-story industrial building is adopted to validate the proposed range of applicability.

关键词： non-classical damping structure-equipment interaction real mode superposition approximation method complex mode superposition method seismic response calculation

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Application of MMC with Embedded Energy Storage for Overvoltage Suppression and Fault Ride-through Improvement in Series LCCMMC Hybrid HVDC System

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Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 1001-1013页

作者： xiaodong li Zheng Xu Zheren Zhang Department of Electrical Engineering Zhejiang UniversityHangzhou 310027China IEEE

The series line-commutated converter(LCC)and modular multilevel converter(MMC)hybrid high-voltage direct current(HVDC)system provides a more economical and flexible alternative for ultra-HVDC(UHVDC)transmission,which is the so-called Baihetan-Jiangsu HVDC(BJ-HVDC)project of *** one LCC and two MMCs(1+2)operation mode,the sub-module(SM)capacitors suffer the most rigorous overvoltage induced by three-phase-to-ground fault at grid-side MMC and valve-side single-phase-to-ground fault in internal *** order to suppress such huge overvoltage,this paper demonstrates a novel alternative by employing the MMC-based embedded battery energy storage system(MMC-BESS).Firstly,the inducements of SM overvoltage are ***,coordinated with MMC-BESS,new fault ride-through(FRT)strategies are proposed to suppress the overvoltage and improve the FRT ***,several simulation scenarios are carried out on PSCAD/*** overvoltage suppression is verified against auxiliary device used in the BJ-HVDC project in a monopolar BJ-HVDC ***,the proposed FRT strategies are validated in the southern Jiangsu power grid of China based on the planning data in the summer of *** results show that the MMC-BESS and proposed FRT strategies could effectively suppress the overvoltage and improve the FRT capability.

关键词： line-commutated converter(LCC) modular multilevel converter(MMC) MMC-based embedded battery energy storage system(MMC-BESS) fault ride-through(FRT)capability overvoltage suppression

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系统性硬化症合并干燥综合征的临床特征分析及危险因素研究

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中国全科医学 2025年第6期28卷 737-741,750页

作者：邹松炎张日伊李孝东穆银玉浙江省宁波市医疗中心李惠利医院检验科 315040

背景系统性硬化症(SSc)是异质性疾病,常同时合并干燥综合征(SS),SSc患者部分症状与SS相似,临床诊治过程中容易漏诊SS。目的探讨SSc合并SS患者的临床和实验室特点及重叠发病的危险因素。方法回顾性纳入2019—2023年在宁波市医疗中心李惠... 详细信息

背景系统性硬化症(SSc)是异质性疾病,常同时合并干燥综合征(SS),SSc患者部分症状与SS相似,临床诊治过程中容易漏诊SS。目的探讨SSc合并SS患者的临床和实验室特点及重叠发病的危险因素。方法回顾性纳入2019—2023年在宁波市医疗中心李惠利医院住院治疗的SSc患者为研究对象,收集患者基线资料和实验室检查结果。依据是否合并SS将患者分为SSc组(n=91)和SSc合并SS组(n=36)。采用多因素Logistic回归分析探究SSc合并SS的危险因素。结果SSc合并SS组患者女性比例、病程、血液受累、局限性皮肤型SSc(lcSSc)、自身免疫性肝病比例高于SSc组,肺部受累比例、环磷酰胺使用比例低于SSc组(P<0.05)。SSc合并SS组患者血小板分布宽度、补体C4、抗硬皮病70抗体检出率低于SSc组,碱性磷酸酶、谷氨酰转肽酶、免疫球蛋白M(IgM)、抗着丝点蛋白B抗体(抗CENP-B抗体)、抗干燥综合征A/Ro52抗体(抗SSA/Ro52抗体)、抗干燥综合征A/Ro60抗体(抗SSA/Ro60抗体)、抗干燥综合征B抗体(抗SSB抗体)、抗线粒体M2抗体(AMA-M2)检出率高于SSc组(P<0.05)。多因素Logistic回归分析结果显示,IgM升高(OR=3.796,95%CI=1.021~14.115)、抗SSA/Ro52抗体阳性(OR=15.099,95%CI=1.750~130.264)、抗CENP-B抗体阳性(OR=11.681,95%CI=1.662~82.097)是SSc合并SS的独立危险因素(P<0.05)。结论SSc合并SS患者同时具备两者的特点,当SSc患者IgM偏高,抗SSA/Ro52抗体、抗CENP-B抗体阳性并出现相应临床症状时,应进行唇腺活检等系统全面的检查,以防漏诊。

关键词：硬皮病,系统性系统性硬化症干燥综合征临床特点实验室特点危险因素

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Numerical Simulation of Residual Stress during Microlayer Composite Material Processing by EBPVD Technique

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Journal of Materials Science & Technology 2003年第Z1期19卷 80-82页

作者： liping SHI Yao li xiaodong HE Centerfor Composite Materials Harbin Institute of Technology Harbin 150001 China Centerfor Composite Materials Harbin Institute of Technology Harbin 150001 China Centerfor Composite Materials Harbin Institute of Technology Harbin 150001 China

The preparation technology of microlayer composite material by the electron beam physical vapor deposition (EBPVD) technique was briefly introduced. Taking the advantage of the large-scale commercial softvare of finite element analysis, areasonable physical model was built up during the deposition processing and the distribution of residual stress was analyzedbetween substrate and deposition layer or among deposition layers. The results show that: with the increasing substrate preheating temperature, the interlaminar shear stress increases but the axial residual stress decreases. The probability of curlingup after de-bonding tends to enhance as the thickness of deposition film increases.

关键词： Microlayer composite material, EBPVD, Residual stress, Numerical simulation

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Elevated Ducts and Low Clouds over the Central Western Pacific Ocean in Winter Based on GPS Soundings and Satellite Observation

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Journal of Ocean University of China 2021年第2期20卷 244-256页

作者： li xiaodong SHENG lifang WANG Wencai College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Key Laboratory of Physical Oceanography Ocean University of ChinaQingdao 266100China

Both low clouds and elevated ducts are common phenomena in the oceanic atmosphere. Low clouds affect elevated ducts by changing the structure of atmospheric temperature and humidity. However, due to the limitation of met-ocean measurements, research on them is still scattered. This paper presents the distribution of elevated ducts and clouds over the central Western Pacific Ocean(WPO) based on Global Position System(GPS) sounding data and Himawari-8 satellite products from November 2015 to January 2016. Results show that the frequency of elevated ducts detected by ship-based GPS soundings was as high as 77% over the central WPO. The height and frequency of elevated ducts are closely related to the low clouds. If there are no clouds, the occurrence probability and mean base height of the elevated ducts are 14% and 730 m, respectively. By comparison, the occurrence probability and mean base height increase up to 24% and 1471 m, respectively, in the presence of cumulus(Cu) clouds, and 22% and 1511 m, respectively, in the presence of stratocumulus(Sc) clouds. Elevated ducts occur near the cloud top. The analysis of geopotential height and wind fields from the European Centre for Medium-Range Weather Forecasts(ECMWF) reanalysis dataset(ERA-interim) shows that the study area is covered by a strong and stable subtropical high, and slowly sinking dry air masses inside the subtropical high are above the moist boundary-layer air mass. The appearance and evolution of low clouds will adjust the temperature and humidity structure of the lower troposphere. If there are no clouds, the marine boundary layer(MBL) is the classic mixed boundary layer. Humidity gradient and subsidence inversion are formed atop the mixed layer. When low clouds are present, long wave radiation and entrainment atop clouds form a strong temperature inversion and humidity gradient, which strengthen elevated ducts. However, when Sc clouds are decoupled, a weaker temperature inversion and humidity gradient ma

关键词： elevated duct cumulus cloud stratocumulus cloud marine boundary layer subtropical high

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Modification of CeO_2-ZrO_2 catalyst by potassium for NOx-assisted soot oxidation

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Journal of Environmental Sciences 2011年第1期23卷 145-150页

作者： DuanWeng Jia li, xiaodong Wu Zhichun Si State Key Laboratory of New Ceramics & Fine Process Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

Potassium-modified ceria-zirconia catalyst was synthesized by wetness impregnation method. The ageing treatment was performed in static air at 800℃ for 20 hr to evaluate the thermal stability of the catalyst. The catalysts were characterized by X-ray diffraction, BET surface area, oxygen storage capacity, NOx-temperature programmed desorption and soot-temperature programmed oxidation measurements. By introduction of potassium, the maximum soot oxidation rate temperature （Tin） of the ceria-zirconia based catalyst decreased from 525 to 428℃ in the presence of NO under a loose contact mode. The shift of Tm of the K-modified catalyst after ageing is only 15℃. The enhanced activity of the aged catalyst mainly lies in the promotional effect of potassium on the NOx/oxygen storage capacity as well as the soot-catalyst contact.

关键词： CeO2-ZrO2 mixed oxides potassium soot combustion NOx storage oxygen storage capacity

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