摘要：This paper studies the problem of suboptimal state-feedback H-two/H-infinity control of stochastic systems with spectrum constraint. Concretely speaking, a mixed suboptimal H-two/H-infinity controller synthesis together with placing the spectrum into a strip region is considered, which is achieved via solving a convex optimization problem.

摘要：Benzothiadiazole(BTD) has been extensively used as a building block in optical materials. In this work, a class of π-conjugated BTD-based luminogens BTD-685, BTD-580, BTD-675 and BTD-565 were designed by varying donor units and facilely synthesized by Heck coupling reaction. It was found that their emission in solid state covered the regio from orange, red to near infrared fluorescence. Investigation on photo-physical property manifested that they had strong solvatochromic behavior except symmetric 2-vinylpyridine substituted BTD-565. Crystal X-ray diffraction analysis revealed that they involved in multi weak intermolecular interactions. And loose molecular packing implied that they can be easily rearranged under external force ***, all compounds showed reversible mechanically-responsive behavior in solid state. Interestingly, the vinylpyridinecontaining BTD-565 exhibited hypochromatic mechanochromic behavior, whereas others showed bathochromic mechanochromism behavior. It was worth mentioning that BTD-675 had self-recovery behavior after grinding. The powder X-ray diffraction study showed that these chromic processes may be mainly attributed to the reversible morphological changes between crystalline and amorphous phase upon grinding or fuming. These observations suggested that the vinyl-functionalized benzothiadiazoles can be considered as a type of excellent candidates in mechanically-responsive chromic materials.

摘要：目的:张力腿平台在海上服役时由于振动和系泊问题有漂浮姿态丧失的风险.平台漂浮姿态丧失后会影响作业稳定性和服役安全性.本文旨在对平台漂浮姿态丧失进行风险分析,评估总体的风险等级,识别最具威胁的风险因素,提前采取有效措施,并及时向设计、建造和运营提供反馈意见,保证平台运行安全.创新点:1.在模糊理论的基础上融合统计过程控制理论和层次分析法,形成模糊统计过程控制评估模型;2.建立适用于评估目标的风险评估指标体系,并作为参数输入该风险评估模型,最终获得风险置信区间.方法:1.识别影响漂浮姿态的风险因素并归纳分解,建立风险评估指标体系,并将其作为模糊统计过程控制评估模型的输入参数;2.将应用模糊理论和层次分析法得到的单一独立评价方案的风险结果视为风险的总体随机样本,并利用中心极限定理对风险评估结果进行置信度评价,以获得最终的风险置信区间.结论:1.三种方法的融合使得不确定性和主观性对风险评估的影响大幅减少,结果好于单独用其中任何一种评估方法.2.风险评价指标体系是柔性的,需要随着实际情况做出适当的调整.3.独立风险评价方案的数量依赖于项目的需求,高精度的评估结果需要大量的独立评价方案做底层支撑;独立评价方案的数量不能小于10.4.风险评价指标体系可以不同,但是风险评估方法具有普适性.

摘要：目的:制荡挡板由于其安装方便并可以大幅减弱液舱半载时的晃荡效应而备受关注。本文基于试验验证的计算流体动力学方法,对环型挡板的制荡效应影响因素进行分析,以确定环形挡板中影响制荡效率的主要参数。创新点:1.通过正交设计与数值模拟的结合,得到影响环形挡板制荡效率的主要因素。2.结合正交试验的分析结果及环形挡板制荡机理数值分析,得出改进环形挡板制荡效率的方案。方法:1.通过物理试验对数值模拟方法进行验证;2.通过正交试验设计,制定环形挡板参数的数值试验表(表7),并根据计算结果,对参数的制荡效率影响进行分析(表8和9);3.对主影响参数进行重点分析,得出其制荡效率的变化规律(图19);4.对环形挡板的制荡机理进行分析,并对正交试验结果中各参数水平的影响进行验证。结论:1.环形挡板的高度、倾斜角度以及安装位置均对其制荡效率有显著影响,而环形挡板的厚度影响较小。2.环形挡板的4个参数中,高度因素的影响效果最显著,但是,当高度增至罐体直径的20%时,制荡效率提升速度变得不明显。3.相比于倾斜挡板会产生较多涡流耗散,当环形挡板处于竖直状态时,其较强的阻隔效应可以提供更多的制荡效果;挡板倾斜的方向对制荡效果有一定的影响,但该影响会随着倾斜角度的增大而减小。4.增大两个环形挡板的间距,将增加自由液面的长度,并延缓挡板约束流速的效率,从而减弱挡板的制荡效果。

摘要：程向军多年来潜心耕耘漆画艺术,不断强化漆画语言的现代形态和民族气质,逐渐形成个性化的风格面貌。他从大量的写生实践中提取写意精神,积极融入国家主题性创作,不断进行抽象表现实验,融合中西绘画优长,重新诠释传统漆工艺。使漆画在线面虚实之间形成意象性韵律和当代性语境,又保留了漆材质自身的特质,具有独立的审美价值和人文内涵,从而完成了对本土漆画语言的创新性探索。

摘要：With the ever-pressing issues of global energy demand and environmental pollution,molecular hydrogen has been receiving increasing attention as a clean alternative energy *** hydrogen production,the design and development of high-performance catalysts remains rather *** the compositions and structures of catalyst interfaces have paramount influences on the catalytic performances,the central topic here has always been to design and engineer the interface structures via rational routes so as to boost the activities and stabilities of electrocatalysts on hydrogen evolution reaction(HER).Here in this review,we focus on the design and preparation of multi-scale catalysts specifically catering to HER *** start from the design and structure-activity relationship of catalytic nanostructures,summarize the research progresses related to HER nanocatalysts,and interpret their high activities from the atomistic perspective;then,we review the studies regarding the design,preparation,HER applications and structure-activity relationship of single-atom site catalysts(SASCs),and thereupon discuss the future directions in designing HER-oriented *** the end of this review,we present an outlook on the development trends and faced challenges of catalysts for electrochemical HER.

摘要：A series of new hybrids of dehydroandrographolide(TAD),a biologically active natural product,bearing nitric oxide(NO)-releasing moieties were synthesized and designated as NO-donor *** biological activities of target compounds were studied in human erythroleukemia K562 cells and breast cancer MCF-7 *** evaluation indicated that the most active compound I-5 produced high levels of NO and inhibited the proliferation of K562(IC_(50) 1.55μmol?L^(–1))and MCF-7(IC_(50)2.91μmol?L^(–1))cells,which were more potent than the lead compound TAD and attenuated by an NO *** conclusion,I-5 is a novel hybrid with potent antitumor activity and may become a promising candidate for future intensive study.

摘要：本研究旨在挖掘东莞非遗莞草文化的文化基因,并探索其在产品包装设计领域的应用。通过文献研究、举例说明等方法,深入剖析莞草文化的特点和基因。研究发现,莞草文化独特的生态智慧、手工艺技能和民俗文化元素,具有巨大的设计转化潜力。结合现代设计理念和技术手段,将莞草文化基因融入现代产品设计,不仅可以提升产品的文化附加值,也可为当地经济发展和文化传承提供新的路径。本研究为非遗文化的保护与发展提供了探索模板,展示了传统文化与现代设计相结合的巨大潜力。

摘要：文化创意产业是以创意为核心,以文化为灵魂,以科技为支撑的战略产业。体育用品作为人民健康生活、娱乐消遣密不可分的器物,对促进人民身体健康、陶冶情操以及培养高尚品格等方面发挥着不可替代的重要作用。因此通过打造向之一。

摘要：This paper describes the characteristics of liquefied natural gas （LNG） carriers briefly. The LNG carrier includes power plant selection, vapor treatment, liquid cargo tank type, etc. Two parameters fuel substitution rate and recovery of boil of gas （BOG） volume to energy efficiency design index （EEDI） formula are added, and EEDI formula of LNG carriers is established based on ship EEDI formula. Then, based on steam turbine propulsion device of LNG carriers, mathematical models of LNG carriers＇ reference line value are established in this paper. By verification, the EEDI formula of LNG carriers described in this paper can provide a reference for LNG carrier EEDI calculation and green shipbuilding.