摘要：生命周期评价(Life cycle assessment,LCA)是绿色设计中的产品环境属性的定量评价工具,但LCA的经济和时间代价制约了LCA的企业应用和发展,将LCA与生命周期成本评估(Life cycle costing,LCC)集成优化是解决这一问题的有效途径。在LCA基本架构的基础上提出LCA与LCC集成评价框架,并考虑时间因素,提出基于矩阵的集成评价算法,建立经济属性与环境属性之间的联系。基于集成评价的结果,建立环境与成本的优化模型,并基于并行子空间优化算法(Concurrent subspace optimization,CSSO)进行优化,使综合效益达到最大,实现经济性与环保性的'双赢',为改善产品设计提供量化依据。实例研究验证了所提方法的有效性。

摘要：针对新一代制造系统——智能制造系统(IMS)中Holonic制造系统(HMS)的工艺系统设计理论和方法进行研究,提出HMS中工艺设计的并行模型,研究了基于Holon的工艺系统体系结构,并探讨了体系结构的运行机制,为新一代制造系统的进一步研究提供新的思路。

摘要：With more large-scale scientific computing tasks being delivered to cloud computing platforms, cloud workflow systems are designed for managing and arranging these complicated tasks. However, multi-tenant coexistence service mode of cloud computing brings serious security risks, which will threaten the normal execution of cloud workflows. To strengthen the security of cloud workflows, a mimic cloud computing task execution system for scientific workflows is proposed. The idea of mimic defense contains mainly three aspects: heterogeneity, redundancy, and dynamics. For heterogeneity, the diversities of physical servers, hypervisors, and operating systems are integrated to build a robust system framework. For redundancy, each sub-task of the workflow will be executed simultaneously by multiple executors. Considering efficiency and security, a delayed decision mechanism is proposed to check the results of task execution. For dynamics, a dynamic task scheduling mechanism is devised for switching workflow execution environment and shortening the life cycle of executors, which can confuse the adversaries and purify task executors. Experimental results show that the proposed system can effectively strengthen the security of cloud workflow execution.

摘要：目的针对老年人,提出色彩偏好值的预测方法。方法根据样本数据,运用回归分析法,得出年度变量与色彩偏好均值的函数关系,由预测时间变量得出预测色彩偏好均值;采用区间估计法,得出预测色彩偏好均值区间。结果基于180位老年人连续6年的调研样本,得出2018年老年人色彩的偏好均值区间,并应用于社区文化设施的色彩搭配设计。结论样本均值回归分析与区间估计法,能够解决大样本数据的区间预测问题,适用于色彩趋势预测与配色设计。

摘要：提出一款具有多层辐射叶结构的新型鞭状天线,在10 m鞭状天线体上设置不同的辐射叶层数、半径、长度、分支数、仰角及其分布情况,研究其对天线辐射性能的影响,综合考虑选择一套最合适的辐射叶结构,并为天线进行双加载和宽带匹配网络的算法优化。仿真结果表明,与现有的普通宽带鞭状天线相比,增益和效率得到了普遍提高,在低频段增益最高提高了3 dB,效率最高提高了5%;在高频段增益最高提高了5 dB,效率最高提高了35%,方向图上翘也得到了一定的抑制,为改善现有的宽带鞭状天线提供一种新的结构设计方法。

摘要：为快速获得满足工程需要的小型巡飞弹电动推进系统,采用螺旋桨涡流理论和一阶电动机模型建立了电动推进系统效率计算模型。以巡飞弹巡航阶段电动推进系统效率最高为目标,将爬升阶段巡飞弹所需推力及对应的反扭矩作为约束对桨机参数进行了快速优化设计,得到了电动机与螺旋桨的设计指标。根据该设计指标开展了电动机测功试验,完成了电动机选型;利用Kriging代理模型对螺旋桨进行了详细优化设计,并计算了完整的气动参数。针对设计得到的巡飞弹电动推进系统开展了风洞吹风试验,结果显示螺旋桨理论计算与试验测试误差在8.5%以内,巡航阶段电动推进系统效率设计结果与测试结果误差在2.7%以内,表明所提出的电动推进系统设计方法合理有效,能够为此类巡飞弹设计提供一定程度理论指导。

摘要：This paper presents a control algorithm for push recovery, which particularly focuses on the hip strategy when an external disturbance is applied on the body of a standing under-actuated biped. By analyzing a simplified dynamic model of a bipedal robot in the stance phase, it is found that horizontal stability can be maintained with a suitably controlled torque applied at the hip. However, errors in the angle or angular velocity of body posture may appear, due to the dynamic coupling of the transla- tional and rotational motions. To solve this problem, different hip strategies are discussed for two cases when （1） external dis- turbance is applied on the center of mass （CoM） and （2） external torque is acting around the CoM, and a universal hip strategy is derived for most disturbances. Moreover, three torque primitives for the hip, depending on the type of disturbance, are designed to achieve translational and rotational balance recovery simultaneously. Compared with closed-loop control, the advantage of the open-loop methods of torque primitives lies in rapid response and reasonable performance. Finally, simulation studies of the push recovery of a bipedal robot are presented to demonstrate the effectiveness of the proposed methods.

摘要：The high and large span cast-in-place reinforced concrete cantilever structure of the office building of some court, which is located I-steel at the cantilever and used steel pipe scaffold as the support, has guaranteed the frame body and structure security by the frame body calculating, on-site test and reasonable construction order.

摘要：分析了电熔镁炉熔炼过程对控制器设计的要求,从开发专用控制设备的角度研究了嵌入式控制器的设计和实现,提出了一种基于嵌入式计算机X86硬件架构和Simulink软件开发环境的电熔镁炉专用嵌入式控制器软硬件设计方案,详细介绍了电熔镁炉专用嵌入式控制器的软硬件系统实现方法和相应的智能控制策略。将所设计的专用嵌入式控制器应用于实际工业现场,应用效果表明,系统设计可靠,能够满足熔炼过程对电极电流的控制要求,提高了产品品位,降低了产品能耗。

摘要：以轻型运动飞机"梦想四号"为例,设计一种单转轴折叠上单翼。通过建立简化机翼模型,运用解析几何原理进行分析,再根据理论的求解结果调整结构分离面位置,消除机身结构干涉;通过Catia建模,DMU运动仿真消除机翼内外段结构干涉,并进行细节处的耳片结构设计以及折叠前后的机翼固定问题。该方案应用于"梦想四号"轻型运动型飞机上,只需通过一次转动,实现机翼的折叠收放,方便快速、结构简单、增重较少,在轻型运动型飞机上优势较为明显。