摘要：Searching and designing materials with intrinsically low lattice thermal conductivity （LTC） have attracted extensive considera- tion in thermoelectrics and thermal management community. The concept of part-crystalline part-liquid state, or even part-crystalline part-amorphous state, has recently been proposed to describe the exotic structure of materials with chemical-bond hierarchy, in which a set of atoms is weakly bonded to the rest species while the other sublattices retain relatively strong rigidity. The whole system inherently manifests the coexistence of rigid crystalline sublattices and fluctuating noncrystalline substructures. Representative materials in the unusual state can be classified into two categories, i.e., caged and non-caged ones. LTCs in both systems deviate from the traditional 7-1 relationship （T, the absolute temperature）, which can hardly be described by small-parameter-based perturbation approaches. Beyond the classical perturbation theory, an extra rattling-like scattering should be considered to interpret the liquid-like and sublattice-amorphization-induced heat transport. Such a kind of compounds could be promising high-performance thermoelectric materials, due to the extremely low LTCs. Other physical properties for these part-crystalline substances should also exhibit certain novelty and deserve further exploration.

摘要：Traditional tumor models do not tend to accurately simulate tumor growth in vitro or enable personalized treatment and are particularly unable to discover more beneficial targeted *** address this,this study describes the use of threedimensional(3D)bioprinting technology to construct a 3D model with human hepatocarcinoma SMMC-7721 cells(3DP-7721)by combining gelatin methacrylate(GelMA)and poly(ethylene oxide)(PEO)as two immiscible aqueous phases to form a bioink and innovatively applying fluorescent carbon quantum dots for long-term tracking of *** GelMA(10%,mass fraction)and PEO(1.6%,mass fraction)hydrogel with 3:1 volume ratio offered distinct pore-forming characteristics,satisfactorymechanical properties,and biocompatibility for the creation of the 3DP-7721 *** analysis and quantitative real-time fluorescence polymerase chain reaction(PCR)were used to evaluate the biological properties of the *** with the two-dimensional culture cell model(2D-7721)and the 3D mixed culture cell model(3DM-7721),3DP-7721 significantly improved the proliferation of cells and expression of tumor-related proteins and ***,we evaluated the differences between the three culture models and the effectiveness of antitumor drugs in the three models and discovered that the efficacy of antitumor drugs varied because of significant differences in resistance proteins and genes between the three *** addition,the comparison of tumor formation in the three models found that the cells cultured by the 3DP-7721 model had strong tumorigenicity in nude *** evaluation of the levels of biochemical indicators related to the formation of solid tumors showed that the 3DP-7721 model group exhibited pathological characteristics of malignant tumors,the generated solid tumors were similar to actual tumors,and the deterioration was *** research therefore acts as a foundation for the application of 3DP-7721 models in drug devel

摘要：进入21世纪,包装的作用已经从简单的保护、容纳功能转变为沟通、生产和消费的桥梁。一些紫陶茶具的包装设计缺乏传统文化内涵,因此无法与其他茶壶区分开来。其在表现形式、色彩等方面过于单一,材料不够环保,因此需要个性化定制紫砂茶具包装设计,以深化文创产品内涵。

摘要：广西宏富的自然与文化资源,既有连绵起伏的山川之美,又有勤劳农民四季耕作之成,亦蕴含着多样化的少数民族文化内蕴,包括天地间自然繁育的果实。这些物质与非物质文化的宝藏,向文化创意产品的开发提供了丰硕的可能性。细析广西文化创意产品开发的现状,不难发现其设计领域仍旧布满发展的潜能。近年来,非物质文化遗产保护与传承已逐渐成为社会共识。文章研究了广西非遗文化元素在文创产品中的色彩应用策略,旨在为相关人员工作提供参考。

摘要：文创产品包装设计在当下的设计领域占有重要地位,而高校文创产品设计是高等教育机构从事文化创意产业领域的创意活动和项目,将知识、人才和资源结合在文化创意产业中和包装设计中,可促进文化创意产业与包装设计业的发展,同时也可为学生提供丰富的文化及创意体验。高校文创包装设计旨在培养学生的创意能力,推动地方文化产业发展,促进传统文化继承与创新。高校文创产品包装设计的创新与改变,可为社会创造出更大的文化价值。

摘要：轨道交通系统对于可靠性具有特殊要求,构建高可用轨道交通私有云计算平台,已成为城轨交通的热门研究领域。设计并实现高可用云管系统与高可用云上虚拟机,能有力推动更多的轨道交通业务向云平台迁移,提升资源利用率。首先,介绍轨道交通的云计算建设概况及云平台容错方法;其次,详细描述利用开源OpenStack技术,实现高可用云管平台与高可用虚拟机的方法,利用故障树工具分析云管系统与虚机的失效模式之后,用马尔科夫过程对云管系统与虚机的可靠性进行建模分析;最后,利用设计的高可用云平台,部署完整的基于通信的列车控制系统中的地面业务,并对虚拟机两项可用性的关键指标进行测试,根据测试结果,获得模型的参数,进而计算得到整个私有云计算平台的可用性指标。本研究将为城市轨道交通的高可用云计算平台建设提供有力的理论基础与实践经验。

摘要：在低信噪比环境中及极远测距范围内获得高精度距离测量量是深空测距面临的挑战。再生测距系统通过在航天器中将测距码再生,可将下行链路信噪比提升约30dB,从而解决低信噪比问题,但是已知测距码的无模糊测距距离难以满足未来深空测距需要。通过对复合函数与测距误差的关系进行系统分析,提出通过改变复合函数降低测距误差的方法,并用m序列及新复合函数设计新测距码。共设计8个新测距码,测距误差方差比已知测距码降低0.28~3.78dB,无模糊测距距离从7.5×10^(4)km提升至117×10^(4)~17884×10^(4)km,扩展了15~2384倍。其中包含一种直流分量为0的完全均衡的测距码。仿真结果表明:新测距码能为未来深空通信及深空探测提供更远距离内更高精度的距离测量支撑。

摘要：拉丁超立方设计是最常用的计算机试验设计方法之一,针对现有拉丁超立方设计方法采样一次性且难以兼顾设计的空间均匀性和计算效率的问题,提出了一种演化排列拉丁超立方试验设计方法。通过对小样本设计的演化、排列信息继承和扩充等操作,以较小的计算量实现了样本的扩充与优化。此外,所提方法可以兼顾现有样本和新增采样点之间的关系,实现样本的序列扩充,这在实际近似建模过程中十分方便。通过多组数值试验,验证了本文方法在空间均匀性和计算效率等方面的优越性。

摘要：传统状态观测器仅基于当前观测误差重构系统状态,未充分利用系统历史观测数据.针对存在匹配扰动的二阶不确定线性系统,设计一种比例-积分-时滞滑模观测器,实现不确定线性系统状态的鲁棒确切估计.首先,设计带记忆滑模函数,形式为历史观测误差和当前观测误差的线性组合,设计参数包括滑模面增益和人工时滞两部分,将滑模面中的时滞项基于泰勒级数展开,将截断误差表示为积分形式;然后,设计带记忆输出反馈等效控制律,采用时滞依赖型Lyapunov泛函,进行滑模动态指数稳定性分析和观测补偿;接着,将观测器参数设计转化为多目标优化问题,优化目标包括:系统状态衰减率、控制代价、高频噪声不灵敏度,基于粒子群算法,在上述3个优化目标间实现设计参数优化整定,在“快、准、稳”方面进行合理折衷选择;最后,在无源网络系统中,验证所提出滑模观测器的可行性和有效性.

摘要：边界层发生分离的两个必要条件是流体粘性和正压梯度,设计外形使其表面具有尽量大的负压梯度区域,延缓边界层转捩和流动分离,从而达到减阻目的。本文采用基于细长体理论的流动不分离外形设计方法,设计临界速度为100 m/s的航行体外形,运用数值仿真分析其在不同速度和攻角情况下的流动特性。研究发现,0°攻角下仿真得到的压强分布与理论计算结果一致,摩擦阻力与估算结果一致,证明可以通过外形设计使航行体边界层在高雷诺数条件下保持层流流动不分离状态,以达到大幅减阻的目的;小攻角不会破坏航行体表面流体附着状态,但攻角会使流动出现横向漩涡,边界层发生转捩,使阻力明显增加,但减阻效果仍然存在。