简介：在医药超声成像地里，由织物的速度不同类导致了以便获得高分辨率并且改正阶段错误，联合最小的变化beamforming的一个高分辨率的医药超声成像方法和一般连贯因素被介绍。首先，从元素的数据为集中被推迟；然后，多信道的数据被用于最小的变化beamforming；同时，数据从数组空格被转变到横梁空格计算一般连贯因素；最后，一般连贯因素习惯于重量最小的变化beamforming的结果。医药图象被成像系统得到。实验基于点目标和无回声的包囊目标被用来验证建议方法。结果证明在分辨率，对比和坚韧性的方面的建议方法比最小的变化beamforming和常规beamforming好。

简介：Sphere-likemesoporousCdSnanocrystalswithhighcrystallinityandbigsurfaceareaweresuccessfullyfabricatedbyultrasoundirradiationatroomtemperature.Theas-synthesizedCdSwithandwithoutultrasoundirradiationwasinvestigatedbythecharacterizationsofX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),andBrunauer-Emmett-Teller(BET)surfaceareas.ThephotocatalyticactivityoftheCdSwasevaluatedbyphotocatalyticdegradationofmethylorangeundervisiblelight(λ>420nm)irradiation.ApossiblemechanismfortheformationoftheCdSnanocrystalswithmesoporousstructureunderultrasoundirradiationwasproposed.TheresultsshowthatboththetemplateroleofthetriblockcopolymerofP123andtheeffectofultrasound-inducedaggregationaremainlyresponsiblefortheformationofmesoporousstructure.Ontheotherhand,theenergygeneratedfromacousticcavitationcaneffectivelyacceleratethecrystallizationprocessoftheamorphousCdS.