简介：AbstractObjective:To assess the value of magnetic resonance imaging (MRI) in fetal lateral ventriculomegaly diagnosed with ultrasound, and to study the relationship between the degree of isolated lateral ventriculomegaly and neonatal prognosis.Methods:The pregnancy information and outcomes of 97 cases of fetal ventriculomegaly were retrospectively reviewed in the Tianjin Central Hospital of Gynecology Obstetrics from January 2016 to December 2017. The maternal age was 18-42 years, and the fetal gestational age at diagnosis was 19+4 to 37+3 weeks. MRI and ultrasound were used to compared the diagnosis of fetal lateral ventriculomegaly and evaluated the development of the nervous system after birth.Results:Among 97 pregnancy cases, associated central nervous system malformations were observed in 36 cases on ultrasound or ultrasound + MRI. Central nervous system malformations were diagnosed with ultrasound in 15 cases (15/36, 41.7%) and with ultrasound + MRI in 25 cases (25/36, 69.4%). Pearson χ2 test was used to compare the detection rates between the groups, and the difference was statistically significant (P < 0.05). We followed up 61 cases of isolated lateral ventriculomegaly for 1-3 years after birth. According to the width of the lateral ventricle of the fetus in middle pregnancy, the subjects were grouped as follows: mild 33 cases (lateral ventricle width 10.0-12.0 mm), moderate 23 cases (lateral ventricle width 12.1-15.0 mm), and severe 5 cases (lateral ventricle width >15.0 mm). The rate of normal growth and development in the mild group was 90.9% (30/33), that in the moderate group was 69.6% (16/23), and that in the severe group was 40.0% (2/5), and the difference between groups was statistically significant (P < 0.05).Conclusion:Ultrasound combined with MRI can detect more central nervous system malformations, and the degree of isolated lateral ventriculomegaly is closely related to fetal prognosis.

简介：无

简介：Inthepast,filminglateralradiogramneededtheassociationoffilmingbedandanglewooden-box.Whichhasthedefectsthatitrequiredtoocomplexoperationandcan'tavoidtheeontralateralshoulderwardingofftheray.TheauthorinventedanewwaytofilmLateralradiogramofmandiblethroughyears'practice,whichismoresimpleandconvenientandsuitableforroutineoperation.

简介：Themostsignificantdifferencesbetweencontinuousweldedrails(CWRs)andgeneralsplit-typeconnectorsareaxialcompressioninthelongitudinaldirection,bucklingstabilityandotherissuesgeneratedundertheinfluenceofthermaleffect.Underthermaleffect,adynamicalbehaviorsimilartothatofabeamfixedontwosidesoccursinthecentrallockedareaoftheweldedrail,asthereisaxialcompressionbutnopossibilityofsliding.Continuousweldedrailsdonotcontractorexpand,andaresupportedbythedynamicalsystemmadeupofballastsandrailclips.Therail-supportsystemmentionedabovehasthefeaturesofnon-uniformmaterialdistributionanduncertaintyofconstructionquality.Duetothesefacts,thedynamicsmethodbasedonthelinearelastichypothesiscannotcorrectlyevaluatetherail'sbucklingconditions.ThisstudyisaimedatapplyingFiniteDifferenceMethod(FDM)andMonteCarloRandomNormalVariablesMethodtotheanalysisofweldedrail'sbucklingbehaviorduringthetrain'saccelerationanddeceleration,underthermaleffectanduncertainfactorsofballastandrailclips.Theanalysisresultshowedthatbucklingoccursunderthecombinedeffectofthermaleffectandthetrain'sdecelerationforceco-effectandthevarianceratioofballastandrailclipsisover0.85,orunderthecombinedeffectofthermaleffectandthetrain'saccelerationforcewhenthevarianceratioisover0.88.

简介：对学习客观解剖并且biomechanical骶的小花梗和侧面的质量展示以便为骶的小花梗和侧面的质量的临床的螺丝钉固定技术提供参考。60成年病人骶骨和尾臀骨的螺线CT图象全部的方法A随机被选择。骶的小花梗和侧面的集体螺丝钉的入口点被决定，并且螺丝钉轨道用三个维的重建方法被测量。同时，粗野解剖在15个成年死尸标本被细看决定骶的小花梗和侧面的质量拧紧入口点。骶的小花梗和侧面的集体螺丝钉轨道的长度，宽度和角度被测量。15个死尸标本中的八个被选择测试骶的小花梗和侧面的集体螺丝钉的最大的抽取力量。小花梗和侧面的集体螺丝钉技术对待的15个盒子的临床的数据镇定、分析。结果S1-S5骶的小花梗和侧面的集体螺丝钉轨道的直径和长度是常规的，与大约20?牧潯敶吗？

简介：ObjectivesConventionalapproachesforremovaloflateralskullbasetumors,includingtransmandibular,infratemporalfossa,preauriculartranszygmaticsubtemporalapproaches,aremajorinvasiveproceduresthatoftensacrificehearingandcauseabnormalocclusionandcosmeticdefects.Reportsofthetranscervicalapproachforresectionofskullbasetumorsarerare,althoughitwasdescribedforresectionofclivalchordomasinasearlyas1966.Thepurposeofthisstudyistoreviewourexperiencesinmanagementoflateralskullbasetumorsusingthetranscervicalapproach.StudyDesignRetrospectivechartreview.MethodsSixlateralskullbasetumorcasestreatedwithtranscervicalapproachprocedureswerereviewed,includingthemedicalrecords.ResultsTherewere4malesand2females.Agerangedfrom12through52years.Histopathologicaldiagnosesincludedmalignantschwannoma(n=1),malignantcarotidbodytumor(n=1),heamangioma(n=1),schwannoma(n=2)andpleomorphicadenoma(n=1).Transcervicaltechniqueswereusedinallcaseswiththeuseofmicroscopeinthelateralskullbasearea.Completetumorremovalwasachievedinallcases.Postoperativeradiotherapywasimplementedin1caseofmalignantschwannomaand1caseofmalignantcarotidbodytumor.Jugularforamensyndromeoccurredasasurgicalcomplicationin1caseofmalignantSchwannomaofthevagusnerve.Therewasnotumorrecurrenceduringthe10-42monthfollow-upperiod.ConclusionComparedwithconventionalapproaches,thetranscervicalapproachprovidesaeasy,safe,minimalinvasiveandeffectiveprocedureforremovalofselectedlateralskullbasetumors.

简介：到进堆积的无弹性的行为的获得卓见，在干燥的沙嵌入并且使遭到了到周期的侧面的装载的垂直堆积的反应在在Laboratoire中央desPontsetChaussées进行的离心机测试试验性地被学习。周期的装载的三种类型被使用，二不对称并且关于卸掉的堆积对称的。有深度的土壤僵硬的一个近似方形根的变化从间接飞行中的密度大小，重新组成的样品上的实验室测试，和生长得很好的实验关联被获得。测试用一个周期的非线性的Winkler春天模型被模仿，它描述无弹性的现象的完整的范围，包括堆积从并且到土壤的分离和重新附件。模型由能够复制的三个数学表达式组成许多单音的补品和周期的试验性的p-y弯。参数图形地被解释的关键模型并且与土壤行为有关的物理意思。有离心机测试结果的比较表明捕获堆积土壤相互作用的几个特征的模型和它的能力的一般有效性，包括：在装载的一个早阶段玷污plastification，在堆积，和僵硬和力量的上面的部分附近由于一个松驰地区的形成“拧”行为由于周期的装载变化。从里斯等的古典曲线的曲线从测试结果和建议模型导出的p-y的比较，以及那些。(1974)为沙，也被介绍。

简介：AbstractBackground:Patients with temporal lobe epilepsy (TLE) originating from different seizure onset zones had distinct electrophysiological characteristics and surgical outcomes. In this study, we aimed to investigate the relationship between the origin and prognosis of TLE, and the stereoelectroencephalography (SEEG) features.Methods:Thirty patients with TLE, who underwent surgical treatment in our functional neurosurgery department from January 2016 to December 2017, were enrolled in this study. All patients underwent anterior temporal lobectomy after an invasive preoperative evaluation with SEEG. Depending on the epileptic focus location, patients were divided into those with medial temporal lobe seizures (MTLS) and those with lateral temporal lobe seizures (LTLS). The Engel classification was used to evaluate operation effectiveness, and the Kaplan-Meier analysis was used to detect seizure-free duration.Results:The mean follow-up time was 25.7 ± 4.8 months. Effectiveness was 63.3% for Engel I (n = 19), 13.3% for Engel II, 3.3% for Engel III, and 20.0% for Engel IV. According to the SEEG, 60.0% (n = 18) had MTLS, and 40.0% (n = 12) had LTLS. Compared with the MTLS group, the operation age of those with LTLS was significantly greater (26.9 ± 6.9 vs. 29.9 ± 12.5 years, t = -0.840, P = 0.009) with longer epilepsy duration (11.9 ± 6.0 vs. 17.9 ± 12.1 years, t = -1.801, P = 0.038). Patients with MTLS had a longer time interval between ictal onset to seizure (67.3 ± 59.1 s vs. 29.3 ± 24.4 s, t = 2.017, P = 0.008). The most common SEEG ictal pattern was a sharp/spike-wave rhythm in the MTLS group (55.6%) and low-voltage fast activity in the LTLS group (58.3%). Compared with the LTLS group, patients with MTLS had a more favorable prognosis (41.7% vs. 77.8%, P = 0.049). Post-operative recurrence was more likely to occur within three months after the operation for both groups, and there appeared to be a stable longterm outcome.Conclusion:Patients with MTLS, who accounted for three-fifths of patients with TLE, showed a more favorable surgical outcome.

简介：Inordertoprobethedeathreasonofterminalbudsandcarryouttrunkextensionbyusinglateralbuds,thetemperaturecharacteristicsofdormancydevelopmentofterminalandlateralbudsinPaulowniatomentosaxp.fortunei33wereinvestigatedbyraisingcuttingbranchesondifferentdateat25℃and15℃.Theresultswereasfollows:①Thedeathreasonofterminalbudsandthefirstpairoflateralbudswasitselfecologicaladaptingstrategy,nottheinjuryofearlyfrostandfreezing;②Thelateralbuds2,3and4hadobtainedthefeatureofwinterdormancy,andcouldsurvivefromcoldwinter,andwidenitspossibletemperaturerangeofsproutingtolowertemperaturebyexperiencingwinterchilling;③Thelateralbuds2,3and4couldsproutatthesametimeinspring,butitwasdifficulttosproutforotherlateralbuds;④Thesproutingofupperlateralbudscouldrestrictthesproutingoflowerlateralbudsat25℃,butnotat15℃.

简介：-Theshearfailureofarigid-plasticdentedclampedtubularbeamunderthelateralimpactofamassisinvestigated.Boththedentingandtheimpactpointareinthemiddlespanofthebeam.Itisassumedthatdentingdoesnotspreadduringtheshearsliding.Numericalresultsshowthattheaxialforceandlateraldeflectionofthebeamareverysmallatthemomentoftheoccurenceofshearfailure,whichmeansthatthefinitedeformationeffectcanbeneglectedintheshearfailureanalysis.Also,someaspectsoftheinitialimpactenergyareinvestigated.

简介：无

简介：Aprecisetangentialcontactdampingmodelisproposed,whichincludesthelateralcontactoftheupper-lowerasperitiesandtheinteractionofadjacentasperities.Theeffectsofthenormalstaticpreload,frequency,andamplitudeoftangentialdisplacementonthetangentialcontactdampingwereanalyzedbysimulation,respectively.Furthermore,theresultsofsimulationareverifiedbyexperiment.Thetangentialcontactdampingofconsideringtheinteractionandlateralcontactofasperityisveryclosetotheexperimentalresults.

简介：

简介：一个修订实验模型为作为两回答的一个函数预言导致液化的侧面的传播排水量(LD)被开发了光谱从YoudsLD数据从强壮运动的变细模型和geotechnical参数导出的加速设定(Youd网站)。这个修订模型与张和赵的模型不同，它为预言侧面的传播克服了更早的模型的一些缺点并且首先在日本和西方的美国被使用如果摇晃扎根，修订模型能潜在地被使用在任何地方(以5%抑制加速或排水量反应系列)能用本地强壮运动的变细关系被估计。修订模特儿从日本和西方的美国用数据被检查并且适用于土耳其和新西兰，在扎根的摇晃为每个区域用适当强壮运动的变细关系被估计的地方。修订模型的精确性被把它的预言的侧面的排水量与那些在实际地震测量了作比较评估。结果证明修订模型能在侧面的传播排水量上说明本地seismicity的效果并且与存在预言模型一起是可比较的。

简介：在这份报纸，导弹影响的充满液体的试管的影响盒子的数字模拟与获得的商业有限元素代码LS-DYNA，和结果被进行与试验性的数据相比验证采用的数字模拟模型的有效性。与验证数字方法，当象indenter的团，液体的密度或影响速度那样的参数被改变，另外的条件被作为一样时，影响一根空或充满液体的三跨度的连续管状的横梁的钝indenter的动态反应的进程被学习。模拟结果显示批评穿孔精力和管子的墙的变丑被液体和压力的存在显著地影响。充满试管的液体提供一个基础压力抵抗并且本地化变丑，它可以影响穿孔过程并且导致弹道的限制的减小。模拟结果也显示液体密度的增加填了试管愿望减少弹道的限制，而是液体密度一定在某范围。当它通过对数的转变变得线性时，在试管的弹道的限制速度和影响导弹的团之间的关系在笛卡儿的坐标是非线性的。

简介：Usinganewlow-temperatureprocess(＜600℃),thepoly-SiTFTwasfabricatedbymetal-inducedlateralcrystallization(MILC).Anultrathinaluminumlayerwasdepositedona-Sifilmandselectivelyformedbyphotolithography.Thefilmswerethenannealedat560℃toobtainlaterallycrystallizedpoly-Sifilm,whichisusedasthechannelareaofaTFT.Thepoly-SiTFTshowedanon/offcurrentratioofhigherthan1×106atadrainvoltageof5V.TheelectricalpropertiesaremuchbetterthanTFTfabricatedbyconventionalcrystallizationat600℃.

简介：如果误诊，距骨的侧面的过程破裂是有一个潜力的稀罕损害引起重要病态。这些破裂的适当管理仍然是争论的，仅仅一些报告在这个题目上是可得到的。我们在在损害的时候被误诊的距骨的侧面的过程上与忽视的骨折介绍了37岁的男性的一个案例。长期的脚关节疼痛地在错误诊断以后介绍给7个月的病人。我们的案例在它是在湾穴tarsi作为松开的身体介绍了的距骨的侧面的过程上的忽视的骨折的一个稀罕案例的意义是唯一的。然而，有松开的身体的切除的一个手术与2years’一起介绍了令人满意的结果后续。到我们的知识，它应该是在英语文学报导的第一个案例。通过这份案例报告，当评估损伤到脚关节的侧面的方面时，我们为如此的稀罕多骨的损害强调怀疑的高索引的重要性并且讨论这些破裂的管理的原则。

简介：AbstractBackground:Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder associated with loss of motor neurons. Our objective was to explore the epidemiology, clinical features, and survival factors of 1809 patients with ALS.Methods:We analyzed 1809 ALS patients, who were recruited from the Peking University Third Hospital from January 2005 to December 2015. Demographic data and disease-related parameters were collected. Kaplan-Meier curves were used to compare survival time. Cox proportional hazards function and the hazard ratio were used to identify adjusted prognostic predictors.Results:The results showed that the average annual incidence in Beijing alone was 0.38 cases/100,000 person-years and the mean age of onset was 48.88 ± 11.35 (95% confidence interval [CI]: 48.17-49.85) years. The median survival time from onset to death/tracheostomy was 58.89 ± 33.03 (95% CI: 51.46-63.84) months. In the adjusted Cox proportional hazard model, age of onset, diagnosis delay, rate of disease progression (Amyotrophic Lateral Sclerosis Functional Rating Scale Revised decline [points/month]), and body mass index all had an independent effect on survival in ALS.Conclusions:Our study provides information on epidemiology, clinical features, and survival factors of patients with ALS in China. These results can be helpful in clinical practice, clinical trial design, and validation of new tools to predict disease progression.

简介：

简介：