摘要：A 325-MHz superconducting half-wave resonator has been designed with β = 0.51. Three shapes of the inner conductors(race track, ring shape and elliptical shape) were optimized to decrease the peak electromagnetic fields and minimize the dissipated RF power on the cavity walls. In order to suppress the operation frequency shift caused by fluctuations of the helium pressure and maximize the tuning ranges, the frequency shifts and mechanical properties were studied on the electric and magnetic areas. The helium vessel was designed to keep the mechanical structure as robust as possible.

摘要：在强混合样本下,讨论固定设计回归模型的加权函数估计的一致渐近正态性,给出一致渐近正态性的收敛速度,这个速度接近n-1／6．

摘要：镍氢电池用途广泛,需要根据不同的应用需求定制设计相应性能的镍氢电池.在镍氢电池定制设计过程中,为了解决用户需求与工程技术特征的冲突问题,应用可拓学的矛盾问题处理方法建立镍氢电池不相容问题的可拓求解模型,通过可拓变换找出可拓求解模型中的核问题,计算变换后的相容度函数,识别出引起不相容问题的主要工程技术特征;通过改善这些工程技术特征,获得矛盾问题的可行优化方案.最终通过改进电池的切片毛刺和集耳形状、利用石墨烯取代导电炭黑试制出一种石墨烯镍氢电池,获得满足客户需求的高性能镍氢电池新产品.

摘要：弃土场是山区公路建设中经常出现的具有破坏性的线外附属工程,它对环境的破坏在多年的公路建设中已经得到了验证,故弃土场的设计应全面综合地考虑场区的气候、地形、水文、水文地质和工程地质等自然、地理、地质和社会条件。另外在景区修建公路更应注重环保、生态要求,使弃土场能在所在区域的环境中维持自身的生态能力。

摘要：Projection models are commonly used to evaluate the impacts of ***,previously developed projection tools were not suitable for China’s fisheries as they are either overly complex and data-demanding or too simple to reflect the realistic management ***,an intermediate-complexity projection model was developed that could adequately describe fish population dynamics and account for management measures including mesh size limits,summer closure,and spatial closure.A two-patch operating model was outlined for the projection model and applied to the heavily depleted but commercially important small yellow croaker(Larimichthys polyactis)fishery in the Haizhou Bay,China,as a case *** model was calibrated to realistically capture the fisheries dynamics with *** simulation scenarios featuring different fishing intensities based on status quo and maximum sustainable yield(MSY)were proposed and evaluated with *** projections were additionally performed to investigate the influence of uncertainty associated with recruitment strengths and the implementation of control *** was found that fishing at FMSY level could effectively rebuild the depleted stock biomass,while the stock collapsed rapidly in the status quo *** in recruitment and implementation could result in variabilities in management effects;but they did not much alter the management effects of the FMSY *** results indicate that the lack of science-based control targets in fishing mortality or catch limits has hindered the achievement of sustainable fisheries in ***,the presented work highlights that the developed projection model can promote the understanding of the possible consequences of fishing under uncertainty and is applicable to other fisheries in China.

摘要：为进一步提高阻力型水轮机的效率并降低其对管道液体输送能力的影响,通过单因素试验法分析了叶轮参数对其性能的影响,筛选出了四个关键参数及其取值范围。接着采用响应面法设计试验方案,利用最小二乘法拟合关键参数与效率和水头损失的函数关系,得到了回归模型。最后运用MOPSO算法对回归模型进行寻优,获得了叶轮最佳参数组合。结果表明,优化后的阻力型水轮机效率平均提高4.053%,水头损失平均降低0.679%。

摘要：针对优先订单的物料不齐套造成的生产停滞问题,对优先订单的物料齐套分析方法和实现方案进行研究,构建了优先订单的物料齐套分析平台。利用贪婪算法(Greedy Algorithm)、BOM(Bill of Materials)存储算法、模糊综合评价法等,实现了基于优先级的订单物料齐套分析系统,并以企业实际生产数据多次测试。实验结果表明,该系统对于优先订单的物料齐套分析结果具有良好的准确性与稳定性,能够帮助企业快速查询优先订单的齐套数量,指导企业生产,减少因物料缺失而造成的停工现象。

摘要：武汉市碳酸盐岩天兴洲条带,发育一套巨厚层砂化白云岩,其岩体力学参数取值,目前尚无相关经验或建议。基于Hoek-Brown(简称H-B)准则及其Mohr-Coulomb(简称M-C)线性转换理论,归纳总结前人研究成果,在试验数据的基础上,研究了砂化白云岩的H-B准则参数,提出一种基于静止侧压力系数k_(1)的最大围压上限σ_(3max)简化取值方法,估算其岩体力学参数并给出了取值建议。结果表明:基于k_(1)的σ_(3m)_(ax)简化取值方法,合理缩减了围压σ_(3)的取值区间,提高了计算精度;砂化白云岩的地质强度指数GSI与无侧限抗压强度σ_(ci)呈良好的线性关系,结合其砂化程度在岩体块度上的贴切表现,制作了针对砂化白云岩的改进GSI建议值表;岩体材料参数m_(i)的大小主要受控于岩石种类及细观颗粒的粗糙程度,其取值区间跨度小且对岩体力学参数影响较小,取用m_(i)=9;通过H-B准则与M-C准则的线性转换,建立了σ_(ci)与岩体抗剪强度之间的计算关系;各试验值、拟合值及理论计算值之间关系自洽、结果合理,有效解决了极破碎白云岩岩体力学参数的取值问题。上述基础性工作对H-B准则的应用起到了有益的补充,对武汉市类似岩层的岩体力学参数取值方法研究及运用具有重要借鉴意义。

摘要：为了跟踪国内外海上水面自主船舶(MASS)发展进程,深化对MASS自主性的理解,对国内外MASS在标准规范及科研项目上的发展进行梳理;通过绘制时间尺度上的人机运行机制图对MASS自主性进行解析并以航行感知系统为例进行实例化解读;对MASS的风险评估、模型基础、试验实践内容进行展望。总结分析目前MASS现状和主要问题,提出MASS的3种自主运行模式,为MASS的详细设计及未来发展提供依据和思路。

摘要：Combination antiretroviral therapy(ART)reduced AIDS-related mortality and increased survival among patients living with HIV by interrupting HIV replication,enhancing immune recovery,and preventing the onset of opportunistic infections[1].In China,ART has rapidly been scaled up since the beginning of the National Free Antiretroviral Treatment Program(NFATP)in 2003[2].By the end of 2016,489,411 individuals diagnosed with HIV were receiving free antiretroviral treatment in *** is firmly committed to reducing overall AIDS-related mortality and HIV incidence within the ***,similar to other low-and middle-income countries,the NFATP is challenged by high mortality and attrition shortly after patients initiate ART[3].