简介:许多软件系统在很多个连续版本被开发。在每个版本不仅新代码被增加而且存在代码经常被修改。在这研究,我们证明修改代码能是差错的重要来源。差错广泛地在软件项目作为主要费用司机之一被认出。因此,我们寻找在修改代码改进故障检测的方法。我们建议并且评估很多个预测模型增加故障检测的效率。为了造并且评估我们的模型,我们使用从Ericsson生产的二个大远程通信系统收集的数据。我们由比那两个都把他们用于系统的一个不同版本评估我们的模型的表演他们被造在上并且到一个不同系统。我们的模型的性能与理论最好的模型,的性能相比一个简单模型基于尺寸,以及到在一份随机的订单分析代码(不用任何模型)。我们发现我们的模型的使用在根本并且过去不基于班尺寸用一个简单模型使用任何模型上提供重要改进。我们的模型提供的获得对应于3857%理论最大增益。电子增补材料这篇文章(doi:10.1007/s11390-007-9053-3)的联机版本contatins增补材料,它对授权用户可得到。
简介:Aliquidmodifiedphotoniccrystalfiber(PCF)integratedwithanembeddeddirectionalcouplerandmulti-modeinterferometerisfabricatedbyinfiltratingthreeadjacentairholesoftheinnermostlayerwithstandard1.48refractiveindexliquids.Therefractiveindexofthefilledliquidishigherthanthatofbackgroundsilica,whichcannotonlysupportthetransmittingrodmodesbutalsothe'liquidmodifiedcore'modespropagatingbetweenthePCFcoreandtheliquidrods.Hence,thelightpropagatingintheliquidmodifiedcorecanbeefficientlycoupledintothesatellitewaveguidesunderthephase-matchingconditions,resultinginadramaticdecreaseoftheresonantwavelengthintensity.Furthermore,thereisamulti-modeinterferenceproducedbymodifiedcoremodesandrodmodes.Suchacompact(~0.91cm)deviceintegratedwithanembeddedcouplerandinterferometerisdemonstratedforhigh-sensitivitysimultaneoustemperature(~14.72nm∕℃)andstrain(~13.01pm∕με)measurement.
简介:Polyethylenimine-polyL-lysinePEI-PLL共聚物经由PEI开始的L离氨酸N-carboxyanhydrideLysZ-NCA的戒指洞聚合被综合。有siRNA的PEI-PLL的complexation被粒子尺寸和希腊语的第六个字母潜力大小学习。流动cytometric分析和共焦的成像显示出它的优秀细胞内部的trafficking能力。PEI-PLL在vitro比商业PEI-25k显示了更高的基因silencing效率和更低的cytotoxicity。在antitumor学习,PEI-PLL进一步与siVEGF被相结合并且显然为CT26肿瘤模型的处理显示出肿瘤抑制效果。因此,PEI-PLL是在vivo的进一步的antitumor处理的一个有希望的siRNA搬运人候选人。
简介:Threepolymericadsorbentswithhydrogenbondingacceptors,methylamine,N-methyl-acetamideandaminotri(hydroxymethyl)methanemodifiedresinsaresynthesizedfromchloromethylatedX-5resin.AdsorptionisothermsofphenolandtheophyllineontothethreemodifiedresinsandtheoriginalX-5resinfromaqueoussolutionaremeasured.TheresultsshowthatadsorptionofcompoundswithhydrogenbondingdonorontomethylamineandN-methylacetamidemodifiedresinsisenhancedascomparedwiththatontoX-5resin,andadsorptionmechanismbetweentheadsorbentsandtheadsorbatesismainlybasedonhydrogenbondingandhydrophobicinteraction.Whileadsorptionofcompoundswithhydrogenbondingdonorontoaminotri(hydroxymethyl)methanemodifiedresinisloweredascomparedwiththatontoX-5resin,andadsorptionmechanismbetweentheadsorbentandtheadsorbatesismainlybasedonhydrophobicinteraction.
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简介:Microarraydataareoftenextremelyasymmetricindimensionality,suchasthousandsoreventensofthousandsofgenesbutonlyafewhundredsofsamplesorless.Suchextremeasymmetrybetweenthedimensionalityofgenesandsamplescanleadtoinaccuratediagnosisofdiseaseinclinic.Therefore,ithasbeenshownthatselectingasmallsetofmarkergenescanleadtoimprovedclassificationaccuracy.Inthispaper,asimplemodifiedantcolonyoptimization(ACO)algorithmisproposedtoselecttumor-relatedmarkergenes,andsupportvectormachine(SVM)isusedasclassifiertoevaluatetheperformanceoftheextractedgenesubset.Experimentalresultsonseveralbenchmarktumormicroarraydatasetsshowedthattheproposedapproachproducesbetterrecognitionwithfewermarkergenesthanmanyothermethods.IthasbeendemonstratedthatthemodifiedACOisausefultoolforselectingmarkergenesandmininghighdimensiondata.
简介:Theeffectofnanoparticleaggregationonthethermalconductivityofnanocompositesornanofluidsistypicallynonnegligible.Auniversalmodel(Maxwellmodel)includingnanoparticleaggregationismodifiedinordertopredictthethermalconductivityofnanocompositesmoreaccurately.Thepredictedthermalconductivitiesofsilicaandtitaniananoparticlepowdersarecomparedfirstwiththatmeasuredbyahot-wiremethodandthenwiththoseinpreviousexperimentalworks.Theresultsshowthatthereisgoodagreementbetweenourmodelandexperiments,andthatnanoparticleaggregationinananocompositeenhancesthethermalconductivitygreatlyandshouldnotbeignored.Becauseitconsiderstheeffectofaggregation,ourmodelisexpectedtoyieldprecisepredictionsofthethermalconductivityofcomposites.
简介:牛顿的重复为单个Toeplitz矩阵的组逆的计算被修改。在每次重复,重复矩阵被一个矩阵与一个低排水量等级接近。因为重复矩阵的排水量结构,涉及牛顿的重复的thematrix向量增加能高效地被做。我们证明修改牛顿重复的集中仍然是很快的。数字结果被介绍表明建议方法的快集中。
简介:<正>NaYzeolitewasmodifiedthroughdealuminationwithoxalicacid,andtheHYzeolitewasobtainedbycalcinationofthemodifiedNaYzeolite.Thezeolitemoldingprocesswascarriedoutatambienttemperature(25℃),andtheinfluenceofsolid/fuelmassratioandadsorptivedesulfurizationtimeontheHYzeolitewereinvestigatedthroughtestsonstaticselectiveadsorptivedesulfurizationofFCCgasolinecontainingorganicsulfurcompounds(withaScontent=135ppm).ThesulfurcontentandsulphidetypesintheFCCgasolinewereanalyzedbyaGC2010sulfuranalyzerandaGC-SCDchromatograph.ThetestresultsshowedthatthemoldedHYzeolitewasbetterthantheunmoldedHYzeolite.AtastaticadsorptivedesulfurizationtimeonthemoldedHYzeoliteequatingto6hours,asolid/fuelmassratioof1:3,thesulfurcontentofFCCgasolinewasdecreasedto30ppm,andthedesulfurizationratewasequalto78%.WhenthebreakthroughpointofthemoldedHYwasequalto50ppm,themoldedHYzeolitewascapableofadsorbing4.86mgofsulfurpergramofadsorbent.AndtheregenerationrateofmoldedHYzeolitewasequalto98%.
简介:AbstractPurpose:To analyze the curative effect and technical points of a modified posteromedial approach in the treatment of Klammer III posterior Pilon fracture.Methods:A retrospective analysis of patients with Klammer III posterior Pilon fractures were conducted in our department from January 2018 to December 2019. Before the surgery, the patients were fully relieved of swelling and pain, and a comprehensive examination was carried out. The posteromedial approach exposed the posterior and medial fracture block of the distal tibia. According to the fracture of external malleolus, it is determined whether to combine a lateral incision and protect tendons and vascular nerves by a retractor, and then perform a fracture reduction and internal fixation. Postoperatively, the patients were treated with analgesia, detumescence, anticoagulation and rehabilitation exercise. The American orthopaedic foot and ankle society (AOFAS) score and visual analogue score were recorded at regular follow-up after surgery. A t-test was used for the comparison of the preoperative and final AOFAS score.Results:There were 7 male and 13 female (n = 20) included in the study, aged 22 to 88 years (average age 54.2 years). The injury mechanisms were falling from a height (n = 7), traffic accident (n = 6), walking injury (n = 2) and heavy injury (n = 5). The postoperative follow-up duration was 12—24 months (mean 16.95 months). The AOFAS score of the 20 patients before and after surgery were compared. The preoperative AOFAS score was 38.90 ± 3.91, and the final AOFAS score was 80.55 ± 4.20, (p < 0.001). The mean final visual analogue scores at rest, active and weight-bearing walking were 0.30, 0.85 and 1.70, respectively. One patient reported poor postoperative wound healing and required a return to hospital for debridement and anti-infection treatment.Conclusion:In the treatment of Klammer III posterior Pilon fractures, the modified posteromedial approach can fully expose the fracture block and the collapsed articular surface of the medial malleolus, achieve good reduction and internal fixation with limited injury of the tendon and vascular nerves, and have a better prognosis.
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简介:在这篇文章,作者由夸张正切功能扩大方法,夸张正割扩大方法,和Jacobi椭圆形的功能与量修正为血浆学习修改Zakharov方程的准确旅行波浪答案扩大方法。他们包括三角法的函数解决方案,合理函数解决方案,和更多获得更多的准确旅行波浪解决方案通常独居的波浪,它被称为古典明亮的soliton,塑造W的soliton,和塑造M的soliton。
简介:AbstractObjective:To evaluate the efficacy and safety of a modified cesarean hysterectomy (MCH) procedure in controlling hemorrhage in patients with placenta previa complicated with placenta percreta.Methods:A retrospective analysis was conducted on 23 patients with placenta previa complicated with placenta percreta from January 2016 to December 2018 in the Union Hospital. The patients’ age ranged from 24 to 41 years, and had gestational durations of 32-38 weeks. Nine of them underwent MCH and 14 underwent conventional cesarean hysterectomy (CCH). In the MCH group, the bladder was not mobilized, deliberately. The uterus was excised horizontally above the tourniquet level. Placental tissue around the cervical os was cleaned thoroughly, and hemostatic suturing was performed under direct vision. In the CCH group, the uterus was removed gradually after programmed hemostasis and dissection of adhesions of the vesicouterine peritoneal fold and mobilization of the bladder.Results:There were no significant differences in general conditions between the two groups. The blood loss was significantly less in the MCH group (P < 0.05). The operation time was also decreased dramatically and hospital stay (in days) was shorter than in the CCH group (P < 0.05). There were no bladder or ureter injuries in the MCH group, compared with three cases in the CCH group. There were no statistically significant differences in neonatal birth weight, Apgar score, or intensive care unit admittance rates between the two groups (P > 0.05).Conclusion:This MCH procedure reduced blood loss, avoided bladder injury, and had no long-term complications. It is a safe, rapid, and effective way to control fatal hemorrhage during surgery for women with placenta previa complicated with placenta percreta.