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犬“跛行”的诊治

中国工作犬业 2006年第8期 23-23页

作者：陈立宝河北省唐山市公安局

跛行是四肢运动机能障碍最常见的症状,刚开训的犬易发.跛行有闪伤疼痛和风湿寒痛两种类型.闪伤多见于前肢,常在训练中或使用中突然发病.风湿寒痛多见于后肢,常见有四肢肌肉、关节痛等,多由于风寒湿邪侵入筋骨经络所致,临床上少见.

关键词：跛行诊治犬机能障碍运动

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海底隧道独头钻爆施工通风三维数值分析

甘肃科学学报 2023年第3期35卷 82-87页

作者：楚少虎董俊强朱正国陈立保孙文昊石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室河北石家庄050043 河北省金属矿山安全高效开采技术创新中心河北石家庄050043 中铁第四勘察设计院集团有限公司湖北武汉430063

海底隧道长且竖井少,独头钻爆掘进距离长,施工通风问题突出。以青岛胶州湾第二海底隧道为依托,对钻爆法独头掘进施工的海域段隧道进行了压入式通风条件下掌子面附近风流流场、CO浓度场以及隧道内部粉尘扩散规律的研究。结果表明:根据掌... 详细信息

海底隧道长且竖井少,独头钻爆掘进距离长,施工通风问题突出。以青岛胶州湾第二海底隧道为依托,对钻爆法独头掘进施工的海域段隧道进行了压入式通风条件下掌子面附近风流流场、CO浓度场以及隧道内部粉尘扩散规律的研究。结果表明:根据掌子面处风速要求,风筒出风口距离掌子面40 m处是可行的;隧道通风后,涡流区域粉尘浓度分布不均,隧道风管一侧浓度明显大于另一侧,大部分粉尘在距离掌子面100 m内发生沉降和捕获;并根据CO浓度要求,确定了不同掘进距离和供风量情况下的进洞安全时间。

关键词：海底隧道独头掘进压入式通风 ICEM软件

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Dielectrophoretic assembly of carbon nanotubes and stability analysis

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Progress in Natural Science:Materials International 2013年第4期23卷 367-373页

作者： libao An Craig Friedrich College of Mechanical Engineering Hebei Provincial Key Laboratory of Inorganic Nonmetallic MaterialsHebei United University Department of Mechanical Engineering-Engineering Mechanics Multi-Scale Technologies InstituteMichigan Technological University

Nanoscale dimensions and remarkable properties of carbon nanotubes make them promising building blocks for *** requirement is the need to manipulate single or multiple carbon nanotubes to bridge electronic *** this paper,multi-walled carbon nanotubes with a variety of sizes are assembled onto electrodes using alternative current electric felds by *** effect of the dielectrophoretic parameters and the nanotube size as well as the length uniformity on the assembly is experimentally ***–voltage characteristics of assembled carbon nanotubes are *** experimental results showed that both the dielectrophoretic parameters and length uniformity of carbon nanotubes have an infuence on the stability of assembly *** uniform carbon nanotubes with an appropriate length and suffcient stiffness,which are more controllable by dielectrophoresis,is necessary for an assembly of a small number of carbon nanotubes.

关键词： Carbon nanotube Assembly Dielectrophoresis Process parameter Stability

Degradation characteristics of insulation near aluminium foil edges inside dry-type bushing cores under electrothermal compound stress

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High Voltage 2022年第6期7卷 1153-1164页

作者： Ming chen Xuandong Liu Yuhang Shao Gaoyi Shang Qiaogen Zhang Hao Tang libao Liu State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi'anChina China Electric Power Research Institute BeijingChina Nanjing Electric High Voltage Bushing Co. NanjingChina

Insulation breakdown of dry-type valve-side bushing cores under electrothermal compound stress has become a key factor limiting the safe and stable operation of the converter *** on slices of the real bushing core,it is observed for the first time that fold,peeling off,and fracture defects exist near the aluminium(Al)foil edge,accompanied by many metal spikes with a curvature radius<4μ*** with a capacitor screen thickness of∼2 mm,an electrical tree model is designed to simulate insulation defects near aluminium foil edges inside dry-type bushing cores,whose insulation degradation characteristics under electrothermal compound stress are investigated *** results show that high temperature significantly increases the dielectric loss heat energy density and Joule heat energy density,accelerating the insulation degradation near Al foil *** parallel crepe paper interface significantly accelerates the growth of electrical trees under AC-superimposed positive DC voltage,while this effect is not significant under AC *** the crepe paper consists of wooden fibres of 10μm diameter,the electrical trees tend to grow along interfaces between fibres and epoxy resin to form“feathery”electrical trees in epoxy resinimpregnated paper samples.

关键词： stress insulation compound

Simulating the strong ground motion of the 2022 MS6.8 Luding,Sichuan,China Earthquake

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地震学报:英文版 2023年第4期36卷 283-296页

作者： libao Zhang Lei Fu Aiwen Liu Su chen Institute of Geophysics China Earthquake AdministrationBeijing 100081China College of Architecture and Civil Engineering Beijing University of TechnologyBeijing 100024China

Stochastic finite-fault simulations are effective for simulating ground motions and are widely used in engineering to determine the impacts of ground motion and develop relevant predictive *** this study,the source,path,and site amplification coefficient of western Sichuan Province,China,and stochastic finite-fault simulations were used to simulate the acceleration time series,Fourier amplitude spectra,and 5%damped response spectra of 28 strong-motion stations with rupture distances within 300 km of the 2022 MS6.8 Luding *** simulation results of 14 stations at rupture distances of 45-185 km match the ***,the simulation results of 3 near-and 6 far-field stations at rupture distances of 12-36 km and 222-286 km,respectively,were obviously deviated from the *** results of the near-field stations are larger than the observations at high frequencies(>6 Hz).The discrepancy likely comes from the nonlinear site effect of near-field stations,which reduced the site amplification at high *** result of the far-field stations is smaller than the observation at frequencies above 1 *** these stations are located close to the Longmenshan Fault Zone(LFZ),thus,we obtained a new quality factor(Q)from data of historical events and stations located around *** the new Q value,the discrepancies of the high-frequency simulation results of the far-field stations were *** result indicated that the laterally varying Q values can be used to address the impact of strong crustal lateral heterogeneity on simulation.

关键词： stochastic finite-fault simulation response spectrum quality factor site nonlinearity Luding MS6.8 earthquake

Synthesis and Crystal Structure of the Polymorphic Isomer [Cu(dafone)_2(H_2O)_2](Hphth)_2

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Chinese Journal of Structural Chemistry 2005年第7期24卷 831-835,739页

作者： HEXue-Yan LIUXun-Gao libao-Long ZHANGYong KeyLaboratoryofOrganicSynthesisofJiangsuProvince CollegeofChemistryandChemicalEngineeringSuzhouUniversitySuzhou215006China

The polymorphic isomer [Cu(dafone)2(H2O)2](Hphth)2 1 (dafone = 4,5- diazafluoren-9-one, phth = 1,2-benzenedicarboxyl) has been synthesized and the structure was determined by single-crystal X-ray diffraction. Crystal data: C38H26CuN4O12, monoclinic, space group P21/a with a = 11.5863(18), b = 25.512(4), c = 11.878(2) ?, β = 111.696(3)o, V = 3262.1(9) ?3, Mr = 794.17, Z = 4, Dc = 1.617 g/cm3, F(000) = 1628, μ = 0.748 mm-1, R = 0.0603 and wR = 0.1132 for 6878 observed reflections with I > 2σ(I). 1 consists of one [Cu(dafone)2(H2O)2]2+ cation and two monoprotonated 1,2-benzenedicarboxyl (Hphth) anions and forms a two-dimensional hydrogen bond network via intermolecular hydrogen bond interactions between the coordinated water molecules and carboxylato-oxygen atoms from monoprotonated benzenedicarboxyl anions.

关键词： crystal structure polymorphism copper complex 4,5-diazafluoren-9-one benzenedicarboxyl

基于不同规范对大跨度连续刚构渡槽进行的验算对比分析

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四川水力发电 2024年第2期43卷 42-46,51页

作者：石瑶高立宝陈强代富王广巍中国电建集团成都勘测设计研究院有限公司四川成都611130

鉴于预应力混凝土(PC)连续刚构渡槽具有受力性能优越、跨度大、承载力高等优点,亭子口灌区一期工程Ⅲ标粟家庙渡槽跨张南高速段布置了(67+120+67)m连续刚构渡槽。阐述了遵循相关公路规范和水工规范对渡槽上部结构进行的纵向验算,并分别... 详细信息

鉴于预应力混凝土(PC)连续刚构渡槽具有受力性能优越、跨度大、承载力高等优点,亭子口灌区一期工程Ⅲ标粟家庙渡槽跨张南高速段布置了(67+120+67)m连续刚构渡槽。阐述了遵循相关公路规范和水工规范对渡槽上部结构进行的纵向验算,并分别从承载力极限状态和正常使用极限状态两方面对验算结果进行了分析。分析结果为:对承载力极限状态进行验算得知,公路规范比水工规范更为严格;而对于正常使用极限状态进行验算得知,水工规范比公路规范更为严格。因此得出以下结论:在连续刚构渡槽类水工构筑物设计中,需要同时遵循水工规范和公路规范要求,且须先满足水工规范要求,再按公路规范进行补充。

关键词：亭子口灌区连续刚构渡槽水工规范公路规范承载力极限状态正常使用极限状态

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海底隧道三洞并行施工通风方案优化研究

铁道工程学报 2022年第9期39卷 64-69,78页

作者：朱正国孙奥杰陈立保孙文昊韩智铭孙明磊石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室石家庄050043 中铁第四勘察设计院集团有限公司武汉430063 河北省金属矿山安全高效开采技术创新中心石家庄050043

研究目的:针对钻爆法施工有害气体扩散规律的研究,目前对单洞独头掘进研究较多,对“三洞并行”施工通风研究较少。为探究海底隧道三洞并行施工较优的通风方案并优化风机布置,以青岛胶州湾第二海底隧道工程为依托,重点对海域钻爆段“三... 详细信息

研究目的:针对钻爆法施工有害气体扩散规律的研究,目前对单洞独头掘进研究较多,对“三洞并行”施工通风研究较少。为探究海底隧道三洞并行施工较优的通风方案并优化风机布置,以青岛胶州湾第二海底隧道工程为依托,重点对海域钻爆段“三洞并行”施工污染物运移规律进行研究。通过建立“双孔大断面正洞+小断面服务隧道”的“三洞并行”三维模型,使用FLUENT软件三维紊态RNG k-ε模型和组分输运模型模拟隧道爆破后CO浓度分布,分析三种通风方案下CO浓度场变化规律,在此基础上对横通道射流风机布置进行优化。研究结论:(1)三洞并行工况下,利用中间服务隧道可以有效排出多个工作面钻爆施工产生的污染物,但在横通道区域会有污染物滞留现象;(2)在服务隧道内加入射流风机后,全程无明显CO滞留现象,并且可以明显降低浓度峰值,加快CO排出浓度速率;(3)距离横通道中心10 m处为横通道射流风机最佳放置位置;(4)本研究成果可为相关海底隧道施工通风的设计与施工提供参考和借鉴。

关键词：海底隧道三洞并行钻爆法施工污染物运移规律 CFD

Identification of gut microbes associated with feed efficiency by daily-phase feeding strategy in growing-finishing pigs

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Animal Nutrition 2023年第1期12卷 42-53页

作者： Qin Jiang Chunlin Xie Lingli chen Hongli Xiao Zhilian Xie Xiaoyan Zhu libao Ma Xianghua Yan State Key Laboratory of Agricultural Microbiology Hubei Hongshan LaboratoryFrontiers Science Center for Animal Breeding and Sustainable ProductionCollege of Animal Sciences and TechnologyHuazhong Agricultural UniversityWuhanHubei 430070China The Cooperative Innovation Center of Sustainable Pig Production WuhanHubei 430070China Hubei Provincial Engineering Laboratory for Pig Precision Feeding and Feed Safety Technology WuhanHubei 430070China

Feed efficiency is one of the most important issues for sustainable pig ***-phase feeding(DPF)is a form of precision feeding that could improve feed efficiency in *** microbiota can regulate host nutrient digestion,absorption,and ***,which key microbes may play a vital role in improving the feed efficiency during DPF remains *** the present study,we used a DPF program compared to a three-phase feeding(TPF)program in growing-finishing pigs to investigate the effects of gut microbiota on feed efficiency.A total of 204 Landrace×Yorkshire pigs(75 d)were randomly assigned into 2 *** treatment was replicated 8 times with 13 to 15 pigs per replicate *** in the TPF group were fed with a commercial feeding program that supplied fixed feed for phasesⅠ,Ⅱ,andⅢ,starting at 81,101,and 132 d of age,respectively,and pigs in the DPF group were fed a blend of adjacent phase feed from 81 to 155 d at a gradual daily ratio and phaseⅢfeed from 155 to 180 d of *** feed intake and body weight were recorded by a computerized device in the *** and blood samples were collected from 1 pig per replicate at 155 and 180 d of *** results showed that the DPF program remarkably improved the feed efficiency at 155 d(P<0.001)and 180 d of age(P<0.001),with a significant reduction of the intake of crude protein(P<0.01),net energy(P<0.001),crude fiber(P<0.001),ether extract(P<0.01),and ash(P<0.001).The daily-phase feeding program increased the abundance of Prevotella copri(P<0.05)and Paraprevotella clara(P<0.05),while it decreased the abundance of Ocilibacter(P<0.05)at 155 d of *** results of correlation analysis indicated that the differentially abundant microbiota communities were closely associated with 20 metabolites which enriched amino acid and phenylalanine *** results suggest that 2 key microbes may contribute to feed efficiency during daily-phase feeding strategies in pigs.

关键词： Daily-phase feeding Feed efficiency Gut microbiota Nutrient metabolism Pig