摘要：为保证岑巩县龙江河沿线人民群众生命财产安全，对未达到防洪标准的新城中心区段堤防进行治理，分别从堤线布置及堤距选择、堤防纵横断面设计、堤顶高程的确定分析，综合比选堤防及河道整治建筑物方案，验证堤身设计抗滑稳定，得出堤防建成后可以满足设计防洪标准并留有足够的安全系数，为岑巩县区域社会经济安全稳定提供有力保障。

摘要：Cerium‐based catalysts are very attractive for the catalytic abatement of nitrogen oxides(NOx)emitted from stationary ***,the main challenge is still achieving satisfactory catalytic activity in the low‐temperature range and tolerance to SO2 *** the present work,two series of Mo‐modified CeO_(2)catalysts were respectively obtained through a wet impregnation method(Mo‐CeO_(2))and a co‐precipitation method(MoCe‐cp),and the roles of the Mo species were systematically *** tests showed that the Mo‐CeO_(2)catalyst displayed much higher NO conversion at low temperature and anti‐SO2 ability than MoCe‐*** optimal Mo‐CeO_(2)catalyst displayed over 80%NO elimination efficiency even at 150°C and remarkable SO2 resistance at 250°C(nearly no activity loss after 40 h test).The characterization results indicated that the introduced Mo species were highly dispersed on the Mo‐CeO_(2)catalyst surface,thereby providing more Brønsted acid sites and inhibiting the formation of stable adsorbed NOx *** factors synergistically promote the selective catalytic reduction(SCR)reaction in accordance with the Eley‐Rideal(E‐R)reaction path on the Mo‐CeO_(2)***,the molybdenum surface could protect CeO_(2)from SO2 poisoning;thus,the reducibility of the Mo‐CeO_(2)catalyst declined slightly to an adequate level after *** results in this work indicate that surface modification with Mo species may be a simple method of developing highly efficient cerium‐based SCR catalysts with superior SO2 durability.

摘要："无碳小车"项目是第七届全国大学生工程训练综合能力竞赛的主题,难度非常提高。如何快速设计小车的转向机构,使小车精确走出预期轨迹是竞赛中最具挑战的目标。对传统凸轮的周期进行延拓得到一种新周期能使小车精确走出各种复杂运动轨迹。该文提出了基于SolidWorks Motion的周期延拓凸轮轮廓设计方法,通过SolidWorks艺术绘制出理想轨迹,再通过SolidWorks Motion运动仿真推理出周期延拓凸轮轮廓,最后通过正向运动仿真验证了该设计的准确性。

摘要：在徽州历史上,宗族不断繁衍壮大,宗族文化深入人心,徽州传统村落景观的形成和发展与此有着密切的关联,尤其是村内的宗族建筑、村落格局、街巷空间、建筑空间等都受此影响。在宗族文化视角下,村落景观提升面临着物质载体受损、传统文化消亡等现实困境。应坚持整体性与原真性、动态性与持续性原则,注重宗族文化资源在空间层次、物质形态、非物质文化等方面的有机转化,最终实现传统村落景观的有机提升。

摘要：疝修补补片作为一种持久植入人体内的医疗器械,其安全性及有效性对患者的生存质量至关重要,而临床试验是疝补片上市前安全性及有效性评价的重要方式之一。在对多项疝补片产品上市前临床试验资料技术审评及有关文献汇总分析的基础上,本文对该类器械临床试验设计的各个要素进行了探讨并给出相关建议,供疝补片类医疗器械的制造企业、普外科临床医师在开展此类产品临床试验时予以参考。