mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
多溴联苯醚-153对大鼠体内外神经细胞的毒性研究

目的通过体内外实验,研究BDE-153对大鼠神经细胞的毒性损伤,为研究PBDE的神经毒性提供一定的科学依据。方法(1)体内实验部分:将40只新生雄性清洁级SD大鼠按窝别和体重随机分为溶剂对照(橄榄油)组和低(1 mg/kg)、中(5 mg/kg)、高剂量(10 mg/kg) BDE-153染毒组,每组10只。在仔鼠出生第10天,采用一次性腹腔注射方式进行染毒,并且每周称重并记录大鼠的食欲、饮水量和体重增长状况,观察大鼠的神经行为变化。两个月后,在光镜和电镜下观察脑组织病理学形态和大鼠海马神经细胞超微结构以及TUNEL染色结果,采用比色法和流式细胞术分别检测LDH活力和细胞凋亡;(2)体外实验部分:体外培养大鼠原代神经元,分别用10、20和40 μmol/L BDE-153染毒48 h后(另设DMSO溶剂对照组和空白对照组),在倒置显微镜下观察神经细胞的形态学改变,采用Hoechst 33258和AO/EB染色法观察BDE-153染毒后神经细胞凋亡,采用比色法、CCK-8试剂盒和流式细胞术分别检测LDH活力、细胞活力和神经细胞凋亡率。结果(1)染毒后大鼠一般状况以及行为无明显改变。体内神经细胞病理形态学和超微结构观察显示,BDE-153能引起大鼠神经细胞形态发生改变。与对照组相比,体内外各染毒组海马神经细胞凋亡率和LDH活力均呈剂量依赖性地增加,差异有统计学意义(P<0. 05);(2)与对照组比较,体外各染毒组神经细胞的细胞活力呈现剂量依赖性地降低,差异有统计学意义(P<0. 05)。结论BDE-153能引起体内外大鼠神经细胞的损伤,表现为细胞形态学和超微结构的改变,神经细胞活力降低,使细胞膜的通透性和细胞凋亡率增加。
Microstructure, electrical and dielectric properties, and aging behavior of ZPCCA varistor ceramics with Er_2O_3 doping

The microstructure, electrical and dielectric properties, and DC-accelerated aging of the ZPCCA (ZnO-Pr_6O_(11)-CoOCr_2O_3- Al_2O_3) ceramics were investigated with various contents of Er_2O_3. The ceramic phases consisted of a bulk phase of ZnO grains, and a minor secondary phase of mixture of Pr_6O_(11) and Er_2O_3. The increase of the content of doped Er_2O_3 increased the densities of sintered pellet from 5.66 to 5.85 g/cm~3, and decreased the average grain size from 9.6 to 6.3 μm. With the increase of the content of doped Er_2O_3, the breakdown field increased from 2390 to 4530 V/cm, and the nonlinear coefficient increased from 28.4 to 39.1. The sample doped with 0.25 mol.% Er_2O_3 exhibited the strongest electrical stability; variation rates for the breakdown field measured at 1.0 mA/cm~2, and for the non-ohmic coefficient were –3.4% and –23.8%, respectively, after application of a stress of 0.95 EB/125 °C/24 h.
Tunable color emission in K_3Gd(PO_4)_2:Tb~(3+),Sm~(3+) phosphor for n-UV white light emitting diodes

A series of K_3Gd(PO_4)_2:Tb~(3+),Sm~(3+) phosphors were synthesized through solid state reaction. By co-doping Tb~(3+) and Sm~(3+) into K_3Gd(PO_4)_2 host and singly varying the doping concentration of Sm~(3+), tunable colors from green to yellow and then to orange were obtained in K_3Gd(PO_4)_2:Tb~(3+),Sm~(3+) phosphors under the excitation at 373 nm. The energy transfer process from Tb~(3+) to Sm~(3+) was verified through luminescence spectra and fluorescence decay curves. Moreover, the energy transfer mechanism was demonstrated to be the quadrupole-quadrupole interaction. The results indicated that K_3Gd(PO_4)_2:Tb~(3+),Sm~(3+) phosphors could be a potential application for n-UV white light emitting diodes.
髓内钉固定术中斯氏针辅助闭合复位治疗多段股骨干骨折

股骨干骨折多为高能量损伤导致。闭合复位髓内钉内固定是多数闭合性股骨干骨折的标准治疗方法,并发症发生率很低可以达到99%的愈合率。由于股骨干周围很多肌肉附着,骨折一般移位明显,尤其对于股骨干多段骨折,术中闭合复位往往很困难,增加了手术时间,同时对术者和患者均有一定的辐射,而且术后旋转畸形的发生率很高,出现临床症状,甚至加速关节的退变。同时有报道,辐射可致多种肿瘤的发生,如白血病、甲状腺癌、肺癌等。为了减少多段股骨干骨折患者髓内钉固定术中闭合复位时医护人员和患者的辐射剂量并缩短手术时间,笔者自2010年1月至2014年1月采用斯氏针辅助复位股骨干成角和旋转移位对多段股骨干骨折进行治疗,效果显著。现报告如下。
结直肠锯齿状病变8例临床病理分析

目的分析结直肠锯齿状病变的病理分类及鉴定诊断要点。方法运用形态学方法回顾性分析72例结直肠腺瘤性息肉及83例结直肠增生性息肉的临床资料,综合文献标准对其进行分类。结果72例结直肠腺瘤性息肉及83例结直肠增生性息肉中8例结直肠病变腺体有锯齿状结构,其中4例为锯齿状形态的增生性息肉(hyperplastic polyps,HP),2例为传统锯齿状腺瘤(traditional serrated adenoma,TSA),1例为广基锯齿状腺瘤(sessile serrated adenoma,SSA),1例为混合性息肉(mixed polyposis,MP)。每一种病变在形态上均有与同其他各型组织学相异的特征。结论利用形态学方法能够对各类结直肠锯齿状病变进行诊断和鉴别,提升对结直肠锯齿状病变的认识,提升临床诊断的正确率。
弹簧圈联合组织粘合剂成功封堵残胃支气管瘘1例

我们采用了弹簧圈联合组织粘合剂的方法对残胃支气管瘘进行封堵。现有报道也多采用该方法治疗支气管胸膜瘘,封堵效果优于单纯纤维蛋白胶或组织粘合剂封堵。本例的成功封堵得益于瘘口及瘘道均较小,且经保守治疗后,局部组织感染及水肿已明显减轻,有利于粘合剂附着;选择经残胃端瘘口进行封堵,有效防止了胃液对于瘘口及封堵胶的侵蚀;将微弹簧圈放置于瘘道内,微弹簧圈及附着的尼龙纤毛能有效填塞瘘道,同时又为组织粘合剂提供支撑与附着点,进一步防止了粘合剂在术后早期脱落。我们认为,本方法也适用于瘘道较长而口径较小的残胃支气管瘘的内镜封堵治疗。
In-Situ SHRIMP U-Pb Dating of Xenotime Outgrowth on Detrital Zircon Grains from the Changzhougou Formation of the Ming Tomb District, Beijing

SHRIMP U-Pb dating of diagenetic xenotime from sedimentary rocks has provided age constraints for sedimentary diagenesis (McNaughton et al., 1999; Fletcher et al., 2000; England et al., 2001; Rasmussen et al., 2004; Vallini et al., 2007). Xenotime (YPO4) may grow during early diagenesis, typically being present as a trace constituent in siliciclastic sedimentary rocks (Rasmussen, 2005), in the form of syntaxial outgrowths on detrital zircon grains. Diagenetic xenotime occurs in a wide variety of rock types, including conglomerate, sandstone, siltstone, shale, phosphorite and volcaniclastic rocks, which vary in age from the early Archaean to the Mesozoic (Rasmussen, 2005).
Fission Track Thermochronology Evidence for the Cretaceous and Paleogene Tectonic Event of Nyainrong Microcontinent, Tibet

Fission track dating was applied to analyze the 20 samples from Nyainrong microcontinent, and we obtained 20 apatite and 15 zircon fission track ages. The results show single population grain ages with a single mean age and associated central ages mainly ranging from 108±7 Ma to 35±4 Ma.Their mean track lengths are 12.2–13.9 μm with a single peak. Zircon fission track age range from 78±3 Ma to 117±4 Ma. The results represented the two tectonic uplift events in the study area, namely the Cretaceous and Paleogene periods. According to thermal history modeling results, uplifting rates of two tectonic events is 0.31–0.1 mm/a and 0.07–0.04 mm/a respectively. Combined with field condition and study results, it is suggested that the Cretaceous tectonic uplift event was related to the closure ocean basin caused by Qaingtang–Lhasa collision, and the Paleogene tectonic uplift event was related to the south to thrust system caused by Indo–Asian collision.
2型糖尿病合并头皮坏疽性带状疱疹一例

治疗:给予牛痘疫苗接种家兔炎症皮肤提取物注射液(神经妥乐平)肌内注射、普瑞巴林胶囊和多塞平片口服治疗神经痛,胰岛素和阿卡波糖片控制血糖,注射用头孢哌酮钠舒巴坦钠抗感染。每日患处过氧化氢溶液和生理氯化钠溶液清创换药,生理氯化钠溶液+庆大霉素+中性胰岛素湿敷,红外灯照射创面等对症治疗。3 ~4d后坏死组织以及脓苔均清除,新鲜肉芽开始生长,周围的浅表溃疡均愈合(图2)。1周后神经痛缓解,10d后复查,细菌培养阴性。此后的治疗以控制血糖、创面湿敷换药为主,皮损逐渐愈合,但中心区域愈合缓慢,痛温觉也未恢复。患者因故1个月后自行出院。2个月后随访,溃疡完全愈合,瘢痕形成,无毛发生长,患处仍有针刺样感觉。
Deep Convective Clouds over the Northern Pacific and Their Relationship with Oceanic Cyclones

Based on combined Cloud Sat/CALIPSO detections, the seasonal occurrence of deep convective clouds(DCCs) over the midlatitude North Pacific(NP) and cyclonic activity in winter were compared. In winter, DCCs are more frequent over the central NP, from approximately 30°N to 45°N, than over other regions. The high frequencies are roughly equal to those occurring in this region in summer. Most of these DCCs have cloud tops above a 12 km altitude, and the highest top is approximately 15 km. These wintertime marine DCCs commonly occur during surface circulation conditions of low pressure, high temperature, strong meridional wind, and high relative humidity. Further, the maximum probability of DCCs,according to the high correlation coefficient, was found in the region 10°–20° east and 5°–10° south of the center of the cyclones. The potential relationship between DCCs and cyclones regarding their relative locations and circulation conditions was also identified by a case study. Deep clouds were generated in the warm conveyor belt by strong updrafts from baroclinic flows. The updrafts intensified when latent heat was released during the adjustment of the cyclone circulation current. This indicates that the dynamics of cyclones are the primary energy source for DCCs over the NP in winter.
Structures and Characteristics of the Windy Atmospheric Boundary Layer in the South China Sea Region during Cold Surges

An observational analysis of the structures and characteristics of a windy atmospheric boundary layer during a cold air outbreak in the South China Sea region is reported in this paper. It is found that the main structures and characteristics are the same as during strong wind episodes with cold air outbreaks on land. The high frequency turbulent fluctuations(period<1 min) are nearly random and isotropic with weak coherency, but the gusty wind disturbances(1 min
Projections of the Advance in the Start of the Growing Season during the 21st Century Based on CMIP5 Simulations

It is well-known that global warming due to anthropogenic atmospheric greenhouse effects advanced the start of the vegetation growing season(SOS) across the globe during the 20 th century. Projections of further changes in the SOS for the 21 st century under certain emissions scenarios(Representative Concentration Pathways, RCPs) are useful for improving understanding of the consequences of global warming. In this study, we first evaluate a linear relationship between the SOS(defined using the normalized difference vegetation index) and the April temperature for most land areas of the Northern Hemisphere for 1982–2008. Based on this relationship and the ensemble projection of April temperature under RCPs from the latest state-of-the-art global coupled climate models, we show the possible changes in the SOS for most of the land areas of the Northern Hemisphere during the 21 st century. By around 2040–59, the SOS will have advanced by-4.7 days under RCP2.6,-8.4 days under RCP4.5, and-10.1 days under RCP8.5, relative to 1985–2004. By 2080–99, it will have advanced by-4.3 days under RCP2.6,-11.3 days under RCP4.5, and-21.6 days under RCP8.5. The geographic pattern of SOS advance is considerably dependent on that of the temperature sensitivity of the SOS. The larger the temperature sensitivity,the larger the date-shift-rate of the SOS.
Analysis and Evaluation of the Global Aerosol Optical Properties Simulated by an Online Aerosol-coupled Non-hydrostatic Icosahedral Atmospheric Model

Aerosol optical properties are simulated using the Spectral Radiation Transport Model for Aerosol Species(SPRINTARS)coupled with the Non-hydrostatic ICosahedral Atmospheric Model(NICAM). The 3-year global mean all-sky aerosol optical thickness(AOT) at 550 nm, the Angstrom Exponent(AE) based on AOTs at 440 and 870 nm, and the single scattering albedo(SSA) at 550 nm are estimated at 0.123, 0.657 and 0.944, respectively. For each aerosol species, the mean AOT is within the range of the Aero Com models. Both the modeled all-sky and clear-sky results are compared with observations from the Moderate Resolution Imaging Spectroradiometer(MODIS) and the Aerosol Robotic Network(AERONET). The simulated spatiotemporal distributions of all-sky AOTs can generally reproduce the MODIS retrievals, and the correlation and model skill can be slightly improved using the clear-sky results over most land regions. The differences between clear-sky and all-sky AOTs are larger over polluted regions. Compared with observations from AERONET, the modeled and observed all-sky AOTs and AEs are generally in reasonable agreement, whereas the SSA variation is not well captured. Although the spatiotemporal distributions of all-sky and clear-sky results are similar, the clear-sky results are generally better correlated with the observations. The clear-sky AOT and SSA are generally lower than the all-sky results, especially in those regions where the aerosol chemical composition is contributed to mostly by sulfate aerosol. The modeled clear-sky AE is larger than the all-sky AE over those regions dominated by hydrophilic aerosol, while the opposite is found over regions dominated by hydrophobic aerosol.
Asian Summer Monsoon Onset in Simulations and CMIP5 Projections Using Four Chinese Climate Models

The reproducibility and future changes of the onset of the Asian summer monsoon were analyzed based on the simulations and projections under the Representative Concentration Pathways(RCP) scenario in which anthropogenic emissions continue to rise throughout the 21 st century(i.e. RCP8.5) by all realizations from four Chinese models that participated in the Coupled Model Intercomparison Project Phase 5(CMIP5). Delayed onset of the monsoon over the Arabian Sea was evident in all simulations for present-day climate, which was associated with a too weak simulation of the low-level Somali jet in May.A consistent advanced onset of the monsoon was found only over the Arabian Sea in the projections, where the advanced onset of the monsoon was accompanied by an increase of rainfall and an anomalous anticyclone over the northern Indian Ocean. In all the models except FGOALS-g2, the enhanced low-level Somali jet transported more water vapor to the Arabian Sea, whereas in FGOALS-g2 the enhanced rainfall was determined more by the increased wind convergence. Furthermore,and again in all models except FGOALS-g2, the equatorial SST warming, with maximum increase over the eastern Pacific,enhanced convection in the central West Pacific and reduced convection over the eastern Indian Ocean and Maritime Continent region, which drove the anomalous anticyclonic circulation over the western Indian Ocean. In contrast, in FGOALS-g2, there was minimal(near-zero) warming of projected SST in the central equatorial Pacific, with decreased convection in the central West Pacific and enhanced convection over the Maritime Continent. The broader-scale differences among the models across the Pacific were related to both the differences in the projected SST pattern and in the present-day simulations.
桥接血管的游离皮瓣一期修复肢(指)皮肤伴血管缺损

目的总结桥接血管的游离皮瓣在急诊中修复肢(指)血管及软组织缺损的临床效果。方法2000年10月至2014年6月,我们采用桥接指动脉的动脉化静脉皮瓣修复手指血管及皮肤软组织缺损患者10例,桥接尺(桡)动脉和指动脉的足背皮瓣修复手掌血管及皮肤软组织缺损3例,桥接肱动脉或桡动脉的小腿内侧皮瓣修复上臂或前臂血管及皮肤软组织缺损各1例,桥接指动脉的骨间背穿支皮瓣修复手背组织缺损1例。结果16例皮瓣中15例完全存活,1例出现部分表皮坏死,脱痂后愈合。术后随访3个月至4年,皮肤质地、厚薄均满意,所有皮瓣均未出现硬化、挛缩或影响关节活动。结论桥接血管的游离皮瓣是目前修复肢(指)皮肤伴血管缺损的一种较理想的方法。
指复合组织并指术重建Wassel IV型拇指多指畸形

目的探讨利用指复合组织并指术重建Wassel IV型拇指多指畸形的手术方法及临床疗效。方法对2008年1月至2013年12月我院收治的36例Wassel IV型拇指多指畸形患者,利用指复合组织并指术,根据Wassel IV型主、复指近似度的特点设计近似"S"形切口,切除两指相邻各半的皮肤软组织、甲床、甲板,剔除复拇指指骨,保留复指一侧关节囊、韧带和拇展肌止点进行重建。结果术后随访3个月至2年,拇指外形、屈伸、对掌功能均有明显改善,1例患儿拇指发育较健侧短小,1例患儿生长过程中出现裂甲。手指功能优21例,良12例,可2例,差1例;优良率91.7%。结论利用指复合组织并指术是一种矫正Wassel IV型拇指多指畸形并获得良好拇指外形及恢复拇指伸屈对掌功能的有效方法。
Design support tools to sustain climate change adaptation at the local level: A review and reflection on their suitability

For mid-latitude cities, higher summer temperatures due to climate change are a cause for concern because they aggravate the urban heat island phenomenon and reduce thermal comfort inside buildings. By acquiring the appropriate knowledge and skills, architects and urban designers can become key actors in adaptation to climate change. Two workshops bringing together architects and urban designers provided evidence of deficiencies in this area. We hypothesize that a design support tool (DST) focused on the issue of adaptation of midlatitude cities to rising summer temperatures could help improve knowledge and skills of professionals in the field. The first section presents the results taken from a review and classification of DSTs, which highlight the tools' features that are likely to reach this goal. Tools of the "hybrid" category seem most appropriate. To verify this, seven DSTs were selected and tested by fourteen students enrolled in a graduate-level architecture design studio. The second section presents the results from this test, including an analysis of the final projects, a web-based questionnaire and two focus groups. The relevance of hybrid approaches is established, but the results bring into question the capacity of a single DST to meet the individual and multiple needs of professionals.
Synthesis,characterization and assessment thermal properties of clay based nanopigments

Nano-clay based pigments (NCP) are new type of pigments composed of organic dyes and layered silicate-clay nano-particles, and have already been used in polymeric coatings to improve mechanical thermal and stability properties. In this paper, the basic blue 41(BB41) was intercalated into Na~+- montmorillonite in an aqueous medium. The dye-intercalated montmorillonite was centrifuged, dried, and milled to prepare the nanopigment particles. X-ray diffraction showed an increase in the basal spacing, thus confirming intercalation of the BB41 molecules within the nanostructures of the interlayer spaces. Fourier transform infrared spectroscopy was used for identifying the functional groups and chemical bounding of Na~+-montmorillonite, BB41 and montmor-illonite-BB41. The morphology of NCP was also studied by transmission electron microscopy. Finally, thermo-gravimetric analysis and differential thermograms suggested the thermal stability of the intercalated dye was improved.
Thermodynamic study on dynamic water and organic vapor sorption on amorphous valnemulin hydrochloride

The sorption of water and organic vapors on valnemulin hydrochloride was determined by dynamic vapor sorption at 25 C. The adsorption-desorption behavior of water vapor and a series of organic vapors was investigated to probe the structural changes in valnemulin hydrochloride before and after sorption. The isothermal adsorption equilibrium data was evaluated using Guggenheim-Anderson-deBoer (GAB) and Bru-nauer-Emmett-Teller (BET) models. The BET model is applicable only at low relative pressures (0.1≤RP≤0.4) while the GAB model is applicable in the whole range of RPs (0.1≤RP≤0.9). The sorption kinetics at high RPs was determined by fitting the sorption data to the Avrami equation and the sorption content vs. time relationship could be predicted by the Avrami equation. Finally, the possible sorption mechanism of valnemulin hydrochloride was also discussed.
Bigelovin inhibits STAT3 signaling by inactivating JAK2 and induces apoptosis in human cancer cells

To study the function and mechanism of bigelovin, a sesquiterpene lactone from the flower of Chinese herb Inula hupehensis, in regulating JAK2/STAT3 signaling and cancer cell growth. Methods: HepG2 cells stably transfected with the STAT3-responsive firefly luciferase reporter plasmid (HepG2/STAT3 cells), and a panel of human cancer cell lines were used to identify active compounds. Cell viability was measured using MTT assay. Western blotting was used to detect protein expression and phosphorylation. Kinase assays were performed and the reaction between bigelovin and thiol-containing compounds was analyzed with LC-MS. Results: Bigelovin (1-50 μmol/L) dose-dependently inhibited the IL-6-induced STAT3 activation in HepG2/STAT3 cells (IC_(50)=3.37 μmol/L) and the constitutive STAT3 activation in A549 and MDA-MB-468 cells. Furthermore, bigelovin dose-dependently inhibited JAK2 phosphorylation in HeLa and MDA-MB-468 cells, as well as the enzymatic activity of JAK2 in vitro (IC_(50)=44.24 μmol/L). Pretreatment of the cells with DTT (500 μmol/L) or GSH (500 μmol/L) eliminated the inhibitory effects of bigelovin on the IL-6-induced and the constitutive STAT3 activation. The results in LC-MS analysis suggested that bigelovin might react with cysteine residues of JAK2 leading to inactivation of JAK2. Bigelovin (5 and 20 μmol/L) had no effects on the signaling pathways of growth factors EGF, PDGF or insulin. Finally, bigelovin suppressed the cell viability and induced apoptosis in 10 different human cancer cell lines, particularly those with constitutively activated STAT3. Conclusion: Bigelovin potently inhibits STAT3 signaling by inactivating JAK2, and induces apoptosis of a variety of human cancer cells in vitro.
A study of projections for key point based registration of panoramic terrestrial 3D laser scan

This paper surveys state-of-the-art image features and descriptors for the task of 3D scan registration based on panoramic reflectance images. As modern terrestrial laser scanners digitize their environment in a spherical way, the sphere has to be projected to a two-dimensional image. To this end, we evaluate the equirectangular, the cylindrical, the Mercator, the rectilinear, the Pannini, the stereographic, and the z-axis projection. We show that the Mercator and the Pannini projection outperform the other projection methods.
Adaptive polarimetric decomposition using incoherent ground scattering models without reflection symmetry assumption

Most of the current incoherent polarimetric decompositions employ coherent models to describe ground scattering; however, this cannot truly reflect the fact especially in natural ground surfaces. This paper proposes a highly adaptive decomposition with incoherent ground scattering models (ADIGSM). In ADIGSM, Neumann's adaptive model is employed to describe volume scattering, and to explain cross-polarized power in remainder matrix, so that we can obtain orientation angle randomness for both volume scattering and the dominant ground scattering. The computation of volume scattering parameters is strictly constrained for non-negative eigenvalues, while the volume scattering parameters that explain the most cross-polarized power are selected. When applying ADIGSM to NASA's UAVSAR data, the negative component powers were obtained in quite a few forest pixels. Compared with several newest decompositions, the volume scattering power is obviously lowered, especially in areas dominated by surface scattering or double bounce scattering. The orientation angle randomness of each component is reasonable as well. ADIGSM has potential to be applied in the fields such as PolSAR image classification, land cover mapping, speckle filtering, soil moisture and roughness estimation, etc.
The Two-dimensional Time Coordinate System and Time Prediction Research of M≥6.7 Strong Earthquakes in the Sichuan-Yunnan Region

Since the 20~(th) century, the time intervals of M ≥ 6.7 strong earthquakes in the Sichuan-Yunnan region show obvious regularity. Using the years of the strong events, a two-dimensional time coordinate system is generated, based on which, the time prediction model is constructed for strong earthquakes in the Sichuan-Yunnan region. Prediction analysis shows that there is risk of generating four earthquakes with M ≥ 6. 7 in the Sichuan-Yunnan region in the future 16 years,and there are strong signals for M ≥ 6.7 earthquakes for periods 2012 -2021 and 2025 - 2029. The strong earthquakes may occur around 2014 -2015,2019 and 2027.
Characteristic Period Value of the Seismic Design Response Spectrum of UHV Electrical Equipment

Characteristic period is an important parameter of the seismic design response spectrum. There is important theoretical significance and engineering application value to the study of the characteristic period of seismic design response spectrum of ultra high voltage (UHV) electrical equipment. In this paper, 1448 horizontal earthquake records within the world scope including the United States and Japan for Site Class III were analyzed. Results show that both magnitude and epicentral distance have great influence on the characteristic period. About 80% of characteristic periods of strong earthquake records are about 0.9s. Statistical analysis was conducted on the seismic hazard assessment results of 312 projects of China in recent years, and it is found that about 70% of characteristic periods are about 0.9s. Combined with the related code comparison and analysis, it is suggested that the characteristic period of the seismic design response spectrum of UHV electrical equipment should select 0.9s in order to effectively guarantee the seismic safety of UHV electrical equipment.