简介：TheChinesemodelhasafairlybiginfluenceinAfrica.Eversincereformandopening-up,Chinahasbeenfocusingonthecentraltaskofeconomicconstruction,whichbroughtrapideconomicgrowth,strengtheningcomprehensivenationalpower,improvinglivesofthepeopleandextendinginternationalinfluence.ThesuccessoftheChinesemodelhasarousedmuchinterestintheworld,especiallyAfrica,andproducedpositiveeffects.Itistheoutcomeofacombinationofseveralfactors,suchastheattractionofChina'sdevelopment.theimpetusproducedbythatdevelopmentandtheappealofChina'sfriendlypolicies.Nevertheless,ChinaisnotgoingtosellitsmodelandultimatelyAfricahastocarveoutitsownwayofdevelopment.

简介：以前提及英国跑车,车迷可能会想到摩根,而现在他们又有了新的选择,英国豪车制造商Bristo隔了十多年推出了新款车BristolBullet,这是他们历史上第十八款车.他们的车以高超的工艺著称,面向小众,产量很小,产品评价常是两级分化,但他们的车主相当忠诚,都以自己的爱车为傲.

简介：Amolecularnetworkconstitutivemodelisproposedinthisstudy.Basedontheconceptofmolecularnetworkdecomposition,themolecularnetworkwasdecomposedintoaJames-Guth3-chainnetworkmodelandanArruda-Boyce8-chainnetworkmodel.Consideringthatthesinglemolecularchainofrubberisconstrainedbythesurroundingmolecularnetworks,the3-chainmodelandthe8-chainmodelwereconsequentlymodifiedusingthetubetheory.Theproposedmodelcontainsfourmaterialparametersthatweredeterminedbyfittingtheuniaxialtensiletestdatafromrubber-likematerials,andthevaluesoftheseparameterswereutilizedtodeterminethepureshearandthebiaxialextension.Theproposedmodelagreeswellwiththeexperimentaldataandcanpredictthetestresultsofexperimentsperformedundertheconditionsofpureshearandequi-biaxialdeformationwithacceptableaccuracy.

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简介：背景：心肺复苏术（CPR）需要对病人进行侵入性的医疗操作。这些操作是救治病人的基本手段，但同时又会对病人造成损伤．因此，病人和医生对这些医疗及法医的问题就存在很多困惑。方法：对CPR相关文献进行回顾性分析。结果：常见损伤包括气管结构受损、胸骨骨折。罕见损伤包括：胸膜、心包膜．心肌以及血管的损伤．气管插管相关的喉部软骨及稽经损伤．腹部脏器的穿孔．如：肝脏．胃和脾等。结论：CPR相关的医源性损伤风险伴随正规的CPR操作同时产生，但CPR对患者是行之有效的救助手段。

简介：Thisresearchaimstoimprovetheforecastingprecisionofelectricquantity.ItisdiscoveredthatthetotalelectricityconsumptionconsiderablyincreasedduringtheSpringFestivalbytheanalysisoftheelectricquantitytimeseriesfrom2002to2007inShandongprovince.Thefestivalfactorisascertainedtobeoneoftheimportantseasonalfactorsaffectingtheelectricquantityfluctuations,andthemultiplicationmodelforforecastingisimprovedbyintroducingcorrespondingvariablesandparameters...

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简介：Thispaperhighlightspasteffortsindevelopingerosionprocessconceptsthatleadtothedevelopmentofthecurrentprocess-basederosionpredictionmodel,i.e.,WEPP.Recentprogressincludesthedevelopmentofamultiple-boxsystemthatcansimulatehillslopehydrologicconditions.Laboratoryproceduresenablethequantificationofnear-surfacehydrologiceffects,i.e.,artesianseepagevs.drainage,onthesoilerosionprocessandsedimentregime,flowhydraulics,andsedimenttransportanddepositionprocesses.Theserecentfindingsimprovesoilerosionscienceandprovidenewerosioncontrolstrategiesthatmayhaveadditionalenvironmentalbenefitsrelativetothetraditionalerosioncontrolpractices.Thepaperalsodiscussesthepotentialimpactsoftheerosionprocessonerosionmodeldevelopmentandfutureresearchdirectionsofsoilerosionprocessresearchandmodeldevelopment.

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简介：ThisstudyverifiestheapplicabilityofEPICmodelforanerosionplot(61.2m2)andanuplandterracedwatershed(72ha)usingatotalof94rainfalleventsoverastudyperiodoftwoyears.Inordertoanalyzetheeffectofstormsizeonrunoffandsoillossprocesses,rainfalleventsaredividedintothreegroups:small(＜25mm),moderate(25-50mm)andlarge(＞50mm).Resultsindicatethatthemodelcouldpredictreasonablywelltherunoffandsoillossfromtheerosionplotandthewatershedforthemoderateandlargerainfallevents.However,therunoffandsoillosspredictionforthesmallrainfalleventsisfoundtobepoor.Onannualbasis,bothsurfacerunoffandsoillosspredictionsmatchwelltheobservations.Inlightoftheimportanceofthemoderateandlargerainfalleventsinproducingmostoftheannualrunoffandsoillossinthestudyarea,theEPICmodelisappliedtoassesstheimpactsoferosiononagriculturalproductivityandtoevaluatemanagementpracticestoprotectwatershedsinthemiddlemountainousareaofNepal.

简介：在这研究，老化和很多橡胶材料和橡胶轴承的海洋的腐蚀测试被执行了。为橡胶的组成的Mooney-Rivlin模型参数孤立适用被决定了。由把最少平方的方法用于试验性的数据，在有在为适用的橡胶的组成的模型的常数的变老的时间和海洋的腐蚀时间之间的关系被导出。下次，Mooney-Rivlin模型因此被修改了。进一步，使用修改Mooney-Rivlin模型和Abaqus软件，橡胶的性能孤立轴承被模仿了。模拟结果与试验性的结果相比以便验证修改模型的精确性。比较证明为垂直、水平的僵硬的最大的错误分别地是16.8%和0.49%。因为这些错误被认为可接受，修改组成的模型的精确性能被认为验证。这研究的结果能提供理论支持因为橡胶上的表演学习在复杂海洋环境和桥和其它的生命周期表演评估下面孤立轴承近海结构。

简介：有抑制使用橡胶磁性的粉末(DRM)的材料的一根伸臂横梁被调查了。二个方法被选择保持DRM到一根颤动的钢横梁，一个人是由粘合剂结合由磁性的吸引人的力量(叫的DRM横梁)和其它依附DRM(叫的AB-DRM横梁)。与引起由的AB-DRM横梁的抑制性质不同砍抑制材料的变丑，DRM横梁的抑制性质被滑动描绘和抑制材料的内部损失的摩擦损失。作者建立了明确的表达预言DRM横梁的抑制特征，它试验性地被验证。橡胶材料损失因素尾在抑制DRM横梁对AB-DRM横梁的改进上有明确的影响，这被发现。如果尾是比在0.8255附近的批评价值小的，振动振幅的一个有效范围总是在在哪个DRM，横梁能完成比AB-DRM横梁的更好的抑制存在；相反地，如果尾比批评价值大，当幻灯片发生时，有效范围不存在。如此的结果被用来决定DRM的优点和限制并且开发设计指南。

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简介：ＴｈｅＢｅｉｊｉｎｇ－ｂａｓｅｄＳｙｎｔｈｅｔｉｃＲｕｂｂｅｒＰｌａｎｔｏｆｔｈｅＹａｎｈｕａＰｅｔｒｏｃｈｅｍｉｃａｌＣｏ．Ｌｔｄ．ｉｓＣｈｉｎａ’ｓｌａｒｇｅｓｔｅｎｔｅｒｐｒｉｓｅｐｒｏｄｕｃｉｎｇｓｙｎｔｈｅｔｉｃｒｕｂｂｅｒ．Ｂｕ...

简介：AbstractBackground:The catheter-tissue contact force (CF) is one of the significant determinants of lesion size and thus has a considerable impact on the effectiveness of ablation procedures. This study aimed to evaluate the impact of CF on the lesion size during right ventricular outflow tract (RVOT) ablation in a swine model.Methods:Twelve Guangxi Bama miniature male pigs weighing 40 to 50 kg were studied. After general anesthesia, a ThermoCool SmartTouch contact-sensing ablation catheter was introduced to the RVOT via the femoral vein under the guidance of the CARTO 3 system. The local ventricular voltage amplitude and impedance were measured using different CF levels. We randomly divided the animals into the following four groups according to the different CF levels: group A (3-9 g); group B (10-19 g); group C (20-29 g); and group D (30-39 g). Radiofrequency ablations were performed at three points in the free wall and septum of the RVOT in power control mode at 30 W for 30 s while maintaining the saline irrigation rate at 17 mL/min. At the end of the procedures, the maximum depth, surface diameter, and lesion volume were measured and recorded. A linear regression analysis was performed to determine the relationship between continuous variables.Results:A total of 72 ablation lesions were created in the RVOT of the 12 Bama pigs. The maximum depth, surface diameter, and volume of the lesions measured were well correlated with the CF (free wall: β = 0.105, β = 0.162, β = 3.355, respectively, P < 0.001; septum: β = 0.093, β = 0.150, β = 3.712, respectively, P < 0.001). The regional ventricular bipolar voltage amplitude, unipolar voltage amplitude, and impedance were weakly positively associated with the CF (β = 0.065, β = 0.125, and β = 1.054, respectively, P < 0.001). There was a significant difference in the incidence of steam pops among groups A, B, C, and D (free wall: F = 7.3, P = 0.032; septum: F = 10.5, P = 0.009); and steam pops occurred only when the CF exceeded 20 g. Trans-mural lesions were observed when the CF exceeded 10 g in the free wall, while the lesions in the septum were non-trans-mural even though the CF reached 30 g.Conclusions:CF seems to be a leading predictive factor for the size of formed lesions in RVOT ablation. Maintaining the CF value between 3 and 10 g may be reasonable and effective for creating the necessary lesion size and reducing the risk of complications, such as steam pops and perforations.

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简介：面包屑橡胶修改了包含30网孔的20%面包屑橡胶粒子的沥青被扫描电子显微镜(SEM)在沥青观察小宇宙的外观和面包屑橡胶粒子的典型分发检验了。SEM图画表明面包屑橡胶粒子在沥青均匀地散布并且他们与沥青兼容很好。shear爬面包屑橡胶的测试修改了沥青被执行在?10结合了穿着的板成功地在下列过程被获得：从18张层Al1060/Al3003表的基本的穿着的表第一在450点与44%的起始的滚动减小被获得???????????????″??吗？？