摘要：组件计算是堆物理计算中的一个重要环节。用WIMS- SN系统计算含可燃毒物组件时 ,出现比较大的误差 ,不适宜低温供热堆含可燃毒物组件的计算。文中分析其计算过程 ,改进了该程序系统 ,使它可应用于含可燃毒物燃料组件计算。研究发现用 WIMS棒束模型计算钆棒栅元归并截面时 ,使用的能谱是无钆燃料区的能谱 ,因此会带来较大误差。为了避免这种情况发生 ,在输运计算中必采用多群多区模型。通过与 TPFAP程序校算 ,二者差别较小 。

摘要：To study the behavior and design of tubed circular steel reinforced concrete (TCSRC) short column under axial compressive loads, a nonlinear finite element model (FEM) has been developed to simulate this kind of structure. Depending on the FEM results, an elastic-plastic analysis was carried out to clarify the status of steel tube, then a simplified procedure was proposed to predict the compressive axial load strength. The results obtained from this procedure were compared with the test results. It is found that they agree well each other.

摘要：研究目的:通过比较沉积物运移的不同标准,经选优得出更高精度的标准。创新要点:使用更少的参数和分情况来获得高精度的设计标准。研究方法:1.按状态将下水道中沉积物分成两类:没有沉淀的沉积物和沉淀的推移质;2.利用已有设计标准的方程,运用非线性回归和MINITAB软件,得到不同情况下的最佳方程式;3.用实验所得的值对各方程预测值进行验证,比较各方程式的预测精度。重要结论:1.本文提出的方程式可以预测不同情况下的沉积物运移;2.相比于其它标准,本文提出的方程式形式简单、所需参数少和参数估计简单,并且预测精度更高。

摘要：Satellite launch vehicle lies at the cross-road of multiple challenging technologies and its design and optimization present a typical example of multidisciplinary design and optimization（MDO） *** complexity of problem demands highly effi-cient and effective algorithm that can optimize the *** heuristic approach（HHA） based on meta-heuristics is applied to the optimization of air launched satellite launch vehicle（ASLV）.A non-learning random function（NLRF） is proposed to con-trol low-level meta-heuristics（LLMHs） that increases certainty of global solution,an essential ingredient required in product conceptual design phase of aerospace *** empirical study is performed to evaluate the performance advan-tages of proposed approach over popular non-gradient based optimization *** of ASLV encompasses aerodynamics,propulsion,structure,stages layout,mass distribution,and trajectory modules connected by multidisciplinary feasible design *** approach formulates explicit system-level goals and then forwards the design optimization process entirely over to *** distinctive approach for launch vehicle system design relieves engineers from tedious,iterative task and en-ables them to improve their component level *** is an impetus on vehicle performance and cost,and so it is considered as the core of vehicle design ***,gross launch mass is to be minimized in HHA.

摘要：【Objectives】Rose(Rosa hybrida L.)is a beautiful and widely cultivated flowering plant around the world whose quality is of great commercial *** objective of this study was to investigate the impact of foliar application of calcium nitrate on the quality and postharvest life of two rose varieties(***,and Jumilia)in a soilless culture system.【Methods】The research used a hydroponic culture method,the roses plants were grown in Hoagland nutrient solution containing 50%less Ca for a total span of 4 *** month was dedicated to plant acclimatization,and 3 months for spray *** rose varieties(Rosa hybrida L.),*** and Jumilia plants were used as test materials and planted in pots containing 100%perlite(3-5 mm).After one month of culture,160 mg/kg CaNO3 solution was sprayed,and each treatment corresponded to the first,second,and third harvests,*** plant and flower growth indicators and flower vase life were investigated after each harvesting immediately.【Results】A positive impact of foliar-applied Ca on stem characteristics,pedicel dimensions,corolla size,flower attributes,and vase life was ***,a general trend was observed,wherein an increase in the number of harvesting stages led to improved ***,Jumilia rose consistently exhibited lower values for all studied traits,except for flower vase life,in comparison to the Samurai *** there were no significant differences in length values between Samurai and Jumilia roses due to calcium foliar application across the three harvesting ***’s grouping revealed a specific effect on Jumilia roses during the third harvest *** fertilizer significantly increased photosynthesis rates of of rose leaves in the calcium treatments compared with the control treatment.【Conclusions】Foliar spraying of calcium nitrate is an effective measure to promote the growth of roses and improve the yield,quality and bottle life of fresh cut flowers.

摘要：第一次看到＂麻麻木＂这个名字,很难让人联想到这是一家家居商店。为什么会取这么一个独特的名字呢？麻麻木的创始人梁乐乐解释道：＂是要刺激生活中的麻木感,把有意思的产品带给消费者＂。创立于2015年,并于2016年3月正式上线的麻麻木是一家以＂鬼才设计＂为核心的线上家居商店,专注于创意家居领域,目前已与来自全球各地的不少优秀设计师取得联系,希望将有创意的＂鬼才设计＂家居产品呈现到大众面前。麻麻木的创始人梁乐乐毕业于伦敦中央圣马丁艺术与设计学院,在英国留学并工作了7年多,目前团队有10人左右,部分威员也是英国设计院校出身。

摘要：近年来,高硬度、低摩擦、高耐磨性的类金刚石(Diamond like carbon,DLC)膜引起了国内外学术界和工业界极大的研究兴趣,尤其是它的超低摩擦行为。首先从宏观和微观角度分析了DLC膜超低摩擦的起源,研究发现DLC膜的微观结构和测试环境是影响DLC膜实现超低摩擦的主要因素,而DLC膜的微观结构由其制备工艺决定。然后系统讨论了制备工艺(包括制备方法、反应气源、掺杂元素和基体材料等)和测试环境(包括真空与干燥惰性气体环境、潮湿环境、高温环境、载荷和滑动速度等)对DLC膜超低摩擦行为的影响规律。最后归纳分析了目前对DLC膜超低摩擦机理的几种解释,指出DLC膜作为超低摩擦材料仍需解决的问题及未来的研究趋势。

摘要：拟建中巴铁路是我国"一带一路"倡议中南下通道的重要组成部分。中巴铁路廊道位于喜马拉雅、喀喇昆仑、兴都库什三大山系的交汇区,裂点分布密集,类型齐全。为了增强对裂点地貌效应的认识并合理利用,以中巴经济走廊红其拉普—塔科特段为研究区,首先基于铁路选线对地貌观测尺度的需求,提出了裂点规模的判据并建立了不同类型裂点的判识方法;然后通过对裂点上下游山地灾害数量的对比,证实了裂点上游河段更稳定的规律;最后基于不同类型裂点河流地貌演变效应的分析,提出构造型裂点上游的河流相基座阶地、滑坡型裂点形成的淤积地貌均为铁路布线的良好地形,对于冰川型裂点形成的开阔地形,须确认属小冰期冰川未到达的区域方可利用。

摘要：Objective:To find potential peptide inhibitors against the NS2B/NS3 protease of DENV which in turn,can inhibit the viral replication inside host ***:Cyclic peptides were designed having combination of positively charged amino acids using ChemSketch software and were converted to 3D *** NS3 protein structure was retrieved from Protein Data Bank(PDB)using PDB Id:*** NS3 and cylic peptides were docked using MOE software after structural ***:Through molecular docking it was revealed that most of the peptides bound deeply in the binding pocket of DENV NS2B/NS3 protease an had interactions with catalytic *** 2 successfully blocked the catalytic triad of NS2B/NS3 *** 1,,4 and 6 also had potential interactions with active residues of the NS2B/NS3 protease while all other peptides were in close contact with the active sites of NS2B/NS3 protease thus,these peptides can serve as a potential drug candidate to stop viral ***:*** can be concluded from the study that these peptides could serve as important inhibitors to inhibit the viral replication and need further in-vitro investigations to confirm their efficacy.

摘要：Nowadays, the development of cloud computing has given power to the resource-constrained network control system （NCS） to out-source heavy computations to the cloud server. However, the development of Cloud Computing produced many security challenges regarding the cyber-physical connection between the cloud and control system. The connection between the control system and cloud server can be subjected to distributed denial of service （DDoS） attack by an attacker to destabilize the NCS. In this paper, we will address this issue by building a secure mechanism for such systems. We will design a detection approach and a mitigation approach for better stable performance of NCS. To ensure the stability of NCS at the time of DDoS attack, we will also design a switching mechanism （SM） for cloud control system （CCS） when there are no more real time solutions available from the cloud. Finally, we will apply the proposed mechanism to an unmanned arial vehicle （UAV）. Our simulation results show that the mechanism works well in stability and protection of NCS under DDoS attack.