摘要：This study presents a robust design method for autonomous photovoltaic (PV)-wind hybrid power systems to obtain an optimum system configuration insensitive to design variable variations. This issue has been formulated as a constraint multi-objective optimization problem, which is solved by a multi-objective genetic algorithm, NSGA-II. Monte Carlo Simulation (MCS) method, combined with Latin Hypercube Sampling (LHS), is applied to evaluate the stochastic system performance. The potential of the proposed method has been demonstrated by a conceptual system design. A comparative study between the proposed robust method and the deterministic method presented in literature has been conducted. The results indicate that the proposed method can find a large mount of Pareto optimal system configurations with better compromising performance than the deterministic method. The trade-off information may be derived by a systematical comparison of these configurations. The proposed robust design method should be useful for hybrid power systems that require both optimality and robustness.

摘要：研究目的:为了同时预测固体氧化物燃料电池(SOFC)的电压、温度动态特性和设计控制器,建立SOFC的控制相关动态辨识模型。创新要点:为了建立SOFC更精确的最小二乘支持向量回归机(LSSVR)动态模型,采用遗传算法(GA)优化LSSVR的参数。所建GA-LSSVR模型可同时预测SOFC的电压和温度动态特性。研究方法:1.分析SOFC的电化学和能量平衡子模型。2.利用所选择的最优LSSVR参数,建立了SOFC的GA-LSSVR动态辨识模型。通过仿真分析和比较,验证了所建模型的有效性(图3和4)。3.利用所建模型的预测结果,与模拟退火算法优化最小二乘支持向量回归机(SAA-LSSVR)和5折交叉验证最小二乘支持向量回归机(5FCV-LSSVR)模型的预测结果进行了比较,表明所建立的GA-LSSVR模型具有较高的预测精度(表3和4)。重要结论:通过比较SAA-LSSVR和5FCV-LSSVR模型的预测结果,发现所建GA-LSSVR模型具有较好的预测性能和精度。基于所建立的GA-LSSVR模型可进行有效的多变量控制器设计。

摘要：In this paper, the optical wave propagation in lossy waveguides is described by the Helmholtz equation with the complex refractive-index, and the Chebyshev pseudospectral method is used to discretize the transverse operator of the equation. Meanwhile, an operator marching method, a one-way re-formulation based on the Dirichlet- to-Neumann （DtN） map, is improved to solve the equation. NumericM examples show that our treatment is more efficient.

摘要：以肌苷产生菌BacillusSubtilisJSIM 1 0 1 9为出发菌株 ,根据B subtilis核酸代谢理论设计不同筛选模型 ,用物理、化学诱变剂对亲株进行诱变处理 ,先后有序地获得不同关键酶的缺失或回复即特殊的营养缺陷型以及抗某些代谢类似物的突变株 ,解除终产物对代谢物的抑制和阻遏 ,获得了几株黄嘌呤营养缺陷型并对 8氮鸟嘌呤具有抗性的突变株X 1 3等 ,获得的突变株经单菌分离后得到X 1 3 4 ,36℃培养 72h在培养基中最高积累 1 2 4 3g/L腺苷。

摘要：为降低变压器无功功率损耗.本文通过调整有载分接开关.设计了一种变压器动作控制方法。在分析有载分接开关调控原理的基础上,采用大容量补偿技术检测变压器的无功功率、电流、电压、功率因数等被控量。打开变压器低压面双向晶闸管.连接补偿回路与高压面,通过高压面产生的励磁阻抗控制有载分接开关。利用变压器和开关组成“磁控开关”,可以通过双向晶闸管频繁投切,从而实现对变压器空载合闸与投切动作的控制。实验结果表明方法可以有效控制变压器的空载合闸与投切,且通过开关漏抗还可以完成补偿电容投切操作。

摘要：Luffing mechanism is a key component of the construction *** paper proposes a two degree of freedom(2-DOF)luffing mechanism,which has one more pair of driving cylinders than the single DOF luffing mechanism,to improve the performance of the *** establish the dynamic model of the 2-DOF luffing mechanism,firstly,we develop a hierarchical method to deduce the Jacobian matrix and Hessian matrix for obtaining the kinematics ***,we divide the luffing mechanism into six bodies considering actuators,and deduce the kinetic equations of each body by the Newton-Euler *** on the dynamic model,we simulate the luffing ***,a prototype is built on a pile driver to validate the *** and experiments show that the dynamic model can reflect the dynamic properties of the proposed luffing *** the control strategy that the front cylinders retract first shows better mechanical behavior than the other two control *** research provides a reference for the design and application of 2-DOF luffing mechanism on construction *** modeling approach can also be applied to similar mechanism with serial closed kinematic chains,which allows to calculate the dynamic parameters easily and exactly.

摘要：目的 :针对高寒区野战条件下口腔诊疗难的问题,设计一款高寒区野战条件下单兵便携式口腔治疗装置。方法:该装置采用拉杆箱式结构,由外箱、内框架和操作面板组成,外箱采用低密度聚乙烯材料,通过一次性滚塑工艺成型;内框架上集成高原特制压缩机、独立负压压缩机、可编程逻辑控制器(programmable logic controller,PLC)集成控制系统以及便携式高原单兵呼吸同步脉冲供氧模块;操作面板上配置三用枪、高速涡轮手机、电动变速手机、水控开关、光固化机、超声洁牙手机等治疗用设备。为验证该装置的性能,在高寒区对试验阶段样机进行测试。结果:测试结果表明,试验阶段样机机动性高、功能多样、压力足,能够满足在高寒区口腔诊疗动力气源极限连续工作且运转良好的目标。结论:该装置解决了便携式口腔治疗装置在高原气压不足且不稳定、控制系统集成化低、不易携带以及医护人员缺氧问题,提高了高寒区口腔诊疗远程机动能力,提升了我军口腔移动卫勤保障能力和装备水平。

摘要：国内主要的区域品牌建设大多采用“标准+认证”手段,通过建立体现区域特色的标准化体系,并以此作为依据开展第三方认证评价活动。在区域品牌标准体系设计中,往往结合了管理标准和产品标准。管理标准是面向企业、以体现区域品牌建设核心要素为主的标准,多以地方标准形式发布;产品标准是面向产品、以体现产品质量水平和生产要素的标准,但标准类型却不尽相同。本文通过对比和分析目前国内主要区域品牌建设活动中面向产品的评价标准的差异,为国内其他地区的区域品牌化探索实践提供借鉴意义。

摘要：运用创新设计原理,对室内空间环境的设计创意、空间设计、室内陈设和个性化设计4个方面进行了论述。使室内设计不仅能满足人们在功能上的需求,并更具人性化。

摘要：产品创意设计及其加工技术的发展,已成为国民经济发展的重要指标;作为培养高级专业人才的高校,应引起足够的重视。综观世界各国,凡是创意和设计水平高的,经济就强盛,发展速度就快,两者是成正比关系的。在今后相当的时期内,我们也应把创意设计加工放在优先发展的位置上,大力推动和扶持创意产业和设计产业,从而提高它们对国民经济增长的贡献度,提升我国在国际上的综合竞争力。本文从产品创意实训的特点出发,来如何提高学生实践创新能力,提出了一些建议,供大家商讨。