摘要：在气垫带式输送机的基础上，提出了一种新型带式输送机——水垫带式输送机，与普通托滚式输送机相比，它具有运行阻力小、承载能力大、输送平稳、防火、安全可靠等特点，有很好的应用前景．对水垫静压润滑机理，水垫装置等关键零部件设计进行了详细的分析，并借助ＣＡＤ技术对水垫带式输送机进行了模拟设计，为实际应用提供了参考依据．

摘要：“百鸟衣”作为分布于贵州、广西部分苗族支系的服饰,具有秩序规整的结构、精美繁复的图案和古朴多变的色彩,是苗族盛装的一种特有的组成样式。本文通过田野考察,以贵州丹寨送陇村和榕江摆贝村“百鸟衣”为研究对象,在对样本数据进行归纳整理的基础上,对“百鸟衣”进行溯源和定义,并对其形制结构、图案布局、制作技艺、用色特征、文化内涵等层面进行分析研究,探讨其在“平衡”视角下所呈现的“丰”与“满”的特征,以及建立在此基础之上的图案与结构的内在关联性。

摘要：以瓦日铁路穿沂沭断裂带工程地质选线为例,提出重载铁路复杂断裂构造区选线原则和以遥感构造解译为先导的地质选线方法。根据踏勘、初测阶段的选线要求,选择不同层次的遥感数据组合,可以充分发挥各自特点,达到相互印证、互为补充的目的。根据方案研究区内主干断裂、隐伏断裂、活动断裂和断陷盆地的特点,选择有针对性的遥感图像处理方法,可以进一步突出解译目标,提高解译效果。通过对遥感解译成果、既有资料、地面调查和勘探验证成果的综合分析,将方案研究区划分为稳定区(Ⅰ)、基本稳定区(Ⅱ)、较稳定区(Ⅲ)、欠稳定区(Ⅳ)和不稳定区(Ⅴ)5个区域,为方案研究提供可靠的地质依据。结论如下:采用以遥感构造解译为先导的地质选线方法,可以快速准确获取选线所需的地质信息,为地面调查和勘探验证工作提供指导,有效提高方案研究的效率和质量。

摘要：A hertz-linewidth ultra-stable laser(USL), which will be used to detect the clock transition line, in a strontium optical clock will be launched into the China Space Station(CSS) in late 2022. As the core of the USL, an interference-filter-based externalcavity diode laser(IF-ECDL) was developed. The IF-ECDL has a compact, stable, and environmentally insensitive *** of the IF-ECDL are presented. The developed IF-ECDL can pass the aerospace environmental tests, indicating that the IF-ECDL can be suitable for space missions in the CSS.

摘要：Two series of N-pyridylpyrazolecarboxamide derivatives were designed and synthesized by introducing D-alanine acid esters and D-serine acid esters into the skelecton of chlorantraniliprole. The obtained structures were characterized by 1H NMR, 13C NMR, elemental analysis and specific optical rotation analysis. Preliminary bioas-says indicated that some compounds displayed excellent insecticidal activities against Mythimna separate and Plutella xylostella in comparison with chlorantraniliprole. In particular, IIq showed excellent insecticidal activity against Plutella xylostella with a mortality rate of 90% at 0.01 mg·L^-1. A 3D-QSAR （CoMSIA） study was per- formed in order to disclose the insecticidal structure-activity relationship and indicate the future work. The CoMS1A study demonstrated that large substitutes and electron deficient groups at the 3-position of pyrazole ring are favora- ble, the same as a small group near the ester groups of amino acid.

摘要：The underlying spin-related mechanism remains unclear,and the rational manipulation of spin states is challenging due to various spin configurations under different coordination ***,it is urgent to study spin-dependent oxygen evolution reaction(OER)performance through a controllable ***,we adopt a topochemical reaction method to synthesize a series of selenides with eg occupancies ranging from 1.67 to *** process begins with monoclinic-CoSeO_(3),featuring a distinct laminar structure and Co-O6 *** topochemical reaction induces significant changes in the crystal field's intensity,leading to spin state *** transitions are driven by topological changes from a Co-O-Se-O-Co to a Co-Se-Co configuration,strengthening the crystalline field and reducing eg orbital *** reconfiguration of spin states shifts the rate-determining step from desorption to adsorption for both OER and the hydrogen evolution reaction(HER),reducing the potential-determined step barrier and enhancing overall catalytic *** a result,the synthesized cobalt selenide exhibits significantly enhanced adsorption *** material demonstrates impressive overpotentials of 35 mV for HER,250 mV for OER,and 270 mV for overall water splitting,indicating superior catalytic activity and ***,a negative relation between eg filling and OER catalytic performance confirms the spin-dependent nature of *** findings provide crucial insights into the role of spin state transitions in catalytic performance.

摘要：热防护材料/结构是实现临近空间飞行器高速飞行的一项关键技术,近年来一些新的设计与分析方法不断涌现。本文对这些新的设计与分析方法进行了论述,综合分析后可以看出:热防护材料设计开始从原子、分子尺度出发,根据使用需求设计材料,并发展主动防护与控制环境技术;热防护结构设计在原有防热/承载一体化设计基础上,向多元化以及多功能一体化方向发展,同时积极发展新机制热防护概念设计;热防护分析方法更加注重复杂真实服役状态下多尺度、多物理场及非确定性的精细化分析。这些新概念和新技术有望给热防护技术带来革命性的进步。

摘要：为快速鉴别检测H3、N2和N8亚型禽流感病毒(Avian influenza virus,AIV),建立了一种可同时检测H3、N2、N8亚型AIV的三重RT-LAMP(triplex reverse transcript loop-mediated isothermal amplification,tRT-LAMP)方法。根据NCBI中H3、N2和N8亚型AIV的NA基因保守序列分别设计3套LAMP引物,同时还设计了与FIP的F1c反向互补的荧光探针(FD),并通过退火的方式将FD结合到标记淬灭基团的FIP(FIP)上,形成FIP-FD复合探针后的荧光被淬灭,当FD与FIP分离后,可检测到荧光信号。通过优化反应温度、特异性、敏感性、干扰性和临床样品检测等成功建立了同时检测H3、N2、N8亚型AIV的tRT-LAMP方法。该方法只需要67℃恒温条件就能准确检测和鉴别AIV的3种不同目的基因,且检测其他相关的禽类病原时不产生非特异性扩增;每反应管检测H3、N2和N8亚型AIV最低限度分别为756、735、790 copies/μL,不同浓度模板之间互不干扰;临床样品检测结果显示,tRT-LAMP结果与RT-qPCR及测序结果完全一致。结果表明该方法具有快速、经济、灵敏和特异的优点,扩增结果还可直接肉眼观察,可应用于临床同时检测H3、N2和N8亚型禽流感病毒。

摘要：Inhibition of VEGFR-2 signaling pathway is one of the most promising approaches for the treatment of cancer. In this paper, we reported the design, synthesis, and biological evaluation of a series of biphenylurea derivatives as VEGFR-2 inhibitors. Among these compounds, 39 exhibited potent inhibitory activity against VEGFR-2 both in vitro and in vivo. The antiangiogenesis activity of 39 was further confirmed by both tube formation assay and chick chorioallantoic membrane assay.

摘要：现有关于半无限含水层中隧洞渗流的解析解不能考虑衬砌部分排水的特性。假定土体和衬砌均为饱和均匀连续介质,采用土体与衬砌分算;利用复变函数解决孔口问题基本方法,对土体采用共形映射坐标变换,将土体中的渗流方程转换为与衬砌部分类似的二维Laplace方程圆环域的Dirichlet问题;通过Fourier解法,根据边界条件并利用流量连续条件,求得半无限空间中带衬砌隧洞渗流量和衬砌周边水头解析解答。分析了径深比、土体与衬砌渗透系数相对值、内壁水压力等因素对渗流量和衬砌周边水头的影响,并与数值算例进行了比较。结果表明,对浅埋隧洞该解析解仍具有较好的精度,是简便、实用的计算方法。