摘要：The coolant pump impeller casting is the only rotating component in the nuclear island of an AP1000 nuclear power station, and is required to have a 60-year service time, which requires advanced materials and processing technologies to guarantee. In this paper, the casting process was studied, designed and modified by means of numerical simulation. The gating system was distributed symmetrically and the runner diameter was a little bigger for avoiding sand wash and turbulence;the feeding system focused on the solution of blades feeding, as some parts of which should reach Severity Level 1 radioactive testing standard. Therefore, upper and lower plates cooperating with chillers acted as feeding method besides additional 2-3 times thickness;in addition, lowering sand core strength, decreasing pouring temperature and increasing dimension allowance would be adopted to avoid crack defects. Finally, the pilot impeller was cast. The results show that the casting process design is reasonable, as the liquid rises very smoothly when pouring, and no volume defects are found by means of 100% radioactive testing. Based on this casting process, 16 coolant pump impellers have been successfully produced and delivered to customers.

摘要：针对雨洪模型结构应与实际物理现象较好吻合,以保障内涝防治规划中雨洪模拟结果的准确性,提出了一套提升复杂联围雨洪模拟精度的方法。通过剖析复杂联围的排涝模式,揭示复杂联围的排涝特点及联围内部片区涝水排除特点,分析片区不同地形的产汇流特性及其适宜的模拟方法,并提出了复杂联围的雨洪模型构建方法和建模步骤。以粤港澳大湾区的中(山)珠(海)联围为例,开展复杂联围雨洪模型构建的实证研究。结果表明:构建的模型结构与实际雨洪过程相吻合,模型精度较高,并在率定测试中表现稳定,平均纳什效率系数比其他未遵循联围排涝过程的模型结构高出0.05~0.61。

摘要：Pressure ripples in electric power steering （EPS） systems can be caused by the phase lag between the driver s steering torque and steer angle, the nonlinear frictions, and the disturbances from road and sensor noise especially during high-frequency maneuvers. This paper investigates the use of the robust fuzzy control method for actively reducing pressure ripples for EPS systems. Remarkable progress on steering maneuverability is achieved. The EPS dynamics is described with an eight-order nonlinear state-space model and approximated by a Takagi-Sugeno （T-S） fuzzy model with time-varying delays and external disturbances. A stabilization approach is then presented for nonlinear time-delay systems through fuzzy state feedback controller in parallel distributed compensation （PDC） structure. The closed-loop stability conditions of EPS system with the fuzzy controller are parameterized in terms of the linear matrix inequality （LMI） problem. Simulations and experiments using the proposed robust fuzzy controller and traditional PID controller have been carried out for EPS systems. Both the simulation and experiment results show that the proposed fuzzy controller can reduce the torque ripples and allow us to have a good steering feeling and stable driving.

摘要：This text has expounded the working principle of realizing A/D conversion that utilizes the timer within MCU and combinesthe technology of PWM. The design of hardware circuit, improved gradual approached trial arithmetic and relevant program design arediscussed in detail. And it has analyzed the resolution of A/D converter based on the technology of PWM, etc.

摘要：以俄国构成主义和荷兰风格派为主的前卫现代艺术通过对视觉语言的创新,影响了现代平面设计现代性内涵的定型。其精神内核以平面广告设计为传播载体,参与了视觉现代性的建构并传递了特定的广告设计文化。

摘要：Ion cyclotron wave resonance heating(ICRH) is one of the most important auxiliary methods to heat plasma in the Experimental Advanced Superconducting Tokamak(EAST). Several megawatts of power is transmitted through separate coaxial lines and coupled with the plasma through arrays of loop antennas. The parameters of the ICRH system, including the injected power and phasing between antenna straps, are critical to the coupling efficiency of the power as well as the resulting impact on the heating efficiency. In this paper, we present a system for feedback control of the phase between the current straps and the ICRH power on EAST. The feedback control system was tested using both a matched dummy load and a plasma load, and it successfully maintained stable operation in the 2016 EAST campaign. Good control of the injected power and wave phases was achieved during edgelocalized mode operation.

摘要：建构设计批评学的深层矛盾来源于工具理性与价值理性诉求的基本冲突,并表现在设计演变的各种历史形态中。文章从设计批评标准的无法统一;学科定位的困难;设计批评价值诉求的内在悖论;后工业社会艺术设计作为消费主义文化的符号表征给设计的价值判断带来不定性四个方面具体展开了对建构设计批评学复杂性的文化思考。

摘要：采用实验调查和认知编码的方法,探讨消费者的广告前后品牌态度,品牌认知反应、广告认知反应、广告态度和购买意向之间的关系。结果表明:(1)广告前的品牌态度对广告认知反应、品牌认知反应和广告后的品牌态度有影响;(2)广告认知反应直接影响广告态度,但不直接影响品牌认知反应;(3)消费者的广告态度不但直接影响品牌认知反应和广告后的品牌态度,还直接影响购买意向。这说明在品牌延伸条件下,广告态度的双中介影响模型需要修正。

摘要：为了提高樟叶越桔(Vaccinium dunalianum)悬浮培养细胞的生物量,以樟叶越桔叶片愈伤组织为试材,通过单因素试验探究不同蔗糖浓度、培养基pH值、培养基体积、初始接种量和摇床转速对悬浮培养细胞生长的影响,并根据响应面法Box-Behnken试验设计原理进行组合试验以优化培养条件。结果显示,以改良WPM培养基为基础培养基,樟叶越桔细胞悬浮培养的最优条件为40 g·L^(–1)蔗糖、培养基pH5.2、培养基体积45 mL、初始接种量2.64 g和摇床转速为149 r·min^(–1),其细胞生物量干重为0.1844 g,与理论预测值0.1845 g较为接近,且细胞的生长曲线呈S型。研究结果为樟叶越桔悬浮培养细胞次生代谢产物的生产调控奠定了技术基础。

摘要：在旅游产业集群化发展趋势以及旅游产品越来越呈现出文化创意产业特点的背景下,文化创意产业与旅游业的融合产生了文化旅游创意产业;而文化旅游创意产业在特定空间的集聚构成文化旅游创意产业园区。本文尝试性地对"文化旅游创意产业园区"这一实践早于理论的新兴旅游产品进行了定义;从"一站式体验"的角度出发,总结了文化旅游创意产业园区开发的主流模式;以建设旅游目的地为目标,提出了文化旅游创意产业园区开发的对策。