摘要：深入剖析棉花目标价格政策与棉花“保险+期货”的差异性,为完善我国棉花支持政策提供参考。采用比较研究法,从政策目标实现方式、政策运行机制、政策成本和政策可持续性4个维度对两者进行全面的对比与分析。研究发现:相比于棉花目标价格政策,棉花“保险+期货”降低了各类市场主体对政府补贴的依赖程度,市场化程度高,棉农在风险管理环节的参与度高;政策成本降低且可控;能避免直接价格干预,减少国际贸易摩擦,更具有可持续性。通过分析可得到如下启示:应进一步完善棉花目标价格政策,加快发展棉花“保险+期货”,推动棉花支持政策的多元化和组合化。

摘要：A design of data monitoring recorder is introduced to ensure the stable work of circuit *** recorder is mainly adopted to collect data of different mechanical properties of circuit breakers for real-time online working in power-industrial labs,and to set up a database including both correct information and fault information for assessing and diagnosing power *** recorder uses the master-slave detection core design which adopts both digital signal processor(DSP) and peripheral interface controller(PIC).Not-AND(NAND) flash memory is adopted as a mass storage unit,and the designed clock is used to identify the data being *** to data and communications between the upper computer and the lower computer are achieved through a universal serial bus(USB) *** of an experiment further illustrate the accuracy and reliability of the data obtained by the proposed recorder.

摘要：有机保温材料组成的保温系统在建筑领域被广泛使用,但有机保温材料的防火能力相对较弱,其主要依靠外侧的抹面砂浆充当保护层以提高防火能力。目前,国内建筑有机保温层外设置的抹面砂浆厚度一般为3~4 mm,为研究增加抹面砂浆厚度对防火能力影响,通过标准试验方法,对不同保护层厚度的挤塑聚苯板进行了SBI单体燃烧试验。试验结果表明:保护层厚度为5 mm和8 mm时,对保温材料具有良好的防护效果,能使其燃烧分级达到B 1(C)级(难燃材料/制品),可为建筑防火设计提供参考。

摘要：目的了解青海地区需方(患者及家属)对分级诊疗制度的认识与态度。方法应用统计分析与定性相结合的研究方法对需方进行问卷调查和访谈。结果需方认为实施分级诊疗制度是为了降低患者的医疗费用(53.7%)和解决大医院看病难问题(50.0%);落实分级诊疗的关键是提高基层医疗机构服务能力(64.9%);存在的困难主要是基层缺少适宜的医务人员(58.6%),需要改进的是增加药品品种(43.4%)。结论患者首选基层医疗机构的理念逐步建立,部分地区医疗机构出现"两升两降"趋势。同时存在基层医疗机构卫生人员能力不足、医疗保障制度设计不尽合理、基本药物制度未能满足基层医疗服务需求等问题。因此,通过改进用人机制,调动基层工作人员的积极性;加大培训和对口帮扶力度,提升基层卫生人员业务水平;应用经济杠杆,引导患者合理就医;适当放宽基层医疗机构的用药种类等措施,改进分级诊疗制度的有效实施。

摘要：Gas sensors have received extensive attention because of the gas pollution caused by rapid construction of urbanization and *** sensors based on semiconductor metal oxide(SMO)have the advantages of high response,excellent repeatability,stability,and cost-effectiveness,and have become extremely important components in the gas sensor *** with regular structures and controllable morphology exhibit more consistent and repeatable ***,during the process of material synthesis,because of the uncontrollability of the microcosm,nanomaterials often show irregularities,unevenness,and other ***,the synthesis of gas sensors with well-aligned one-dimensional(1D)structures,two-dimensional(2D)layered structures,and three-dimensional(3D)hierarchical structures has received extensive *** obtain regular structured nanomaterials with desired morphologies and dimensions,a template-assisted synthesis method with low cost and controllable process seems a very efficient *** this review,we introduce the morphology and performance of SMO sensors with 1D,2D,and 3D structures,discuss the impact of a variety of morphologies on gas sensor performance(response and stability),and shed new light on the synthesis of gas sensing materials with stable structure and excellent performance.

摘要：矿石中Au通常以颗粒金或者晶格金的形式存在,在不同类型的金矿石中赋存状态不同,其特殊的延展性引起的颗粒效应对于Au样品的分析技术带来挑战,并且其制备流程要素繁多且不易控制,直接影响Au分析的准确性和稳定性。以矿石中金元素为研究对象,建立泡塑吸附-原子吸收光谱法测定矿石中Au的分析方法,针对样品测试流程中的关键要素进行定性判断和定量计算,提出基于灰色关联度-响应曲面法的最优化模型。讨论样品分析技术中焙烧、消解、富集和解脱等重要环节,确定焙烧方式、消解酸度、富集时间和硫脲浓度为优化要素,设计正交试验并进行相关性分析,计算灰色关联系数并进行极差确定,定性判断各优化要素的显著性。中心组合设计结合响应曲面法原理制作显著水平表,建立二次多项式回归方程的预测模型并进行显著性分析,绘制三维响应曲面图和二维等高线图对实验数据进行拟合分析,确定最优化模型参数焙烧方式、消解酸度、富集时间和硫脲浓度分别为阶梯式分段焙烧、10.58%、40.00 min、11.65 g·L^(-1)。实验结果表明,在最优化模型条件下对金矿石国家一级标准物质进行制备测试,其方法检出限为0.021,测定下限为0.077,加标回收率为91.6%~104.5%,其正确度和精密度均符合GB/T 20899.2—2019质量控制要求;同时对陕西西秦岭地区和甘肃梅川地区外检样品进行方法验证比对,其相对偏差不超过10%且评价结果均为优秀,表明该检测优化模型方法在实际样品中的应用依然准确可靠,具备正确性和科学性。该研究对于地质矿产实验室快速、准确、简便分析Au元素提出新方法,为检验检测领域中优化多目标参数组合的课题提供了新的思路,同时为新一轮战略找矿行动的准确测试贡献力量。

摘要：基于结构性能的结构抗震设计理论要求预先确定明确的结构性能水准。从结构的破坏程度出发,将结构的性能分为五个水准,讨论了结构各系统的性能要求,并提出了评价性能水准的参数指标。

摘要：Seven 2,6-disubstituted N-(2-phenoxy)ethyl imidazo[1,2-a]pyridine-3-carboxamide series containing various amine moieties were designed and synthesized as new anti-TB *** of them show excellent in vitro activity against both drug-sensitive MTB strain H37Rv and two MDR-MTB clinical isolates(MIC:<0.002-0.030 μg/mL).Compounds 2f,5e and 5g display acceptable safety and pharmacokinetic profiles,opening a new direction for further development.

摘要：根据垃圾的降解和稳定机理分析了生物反应器填埋场渗滤液的动态变化规律 ,并对其处理对策进行了探讨。生物反应器填埋场前期产生的渗滤液可全部回灌 ,后期再根据实际情况排放处理部分过量的渗滤液。在对渗滤液水量和水质全面直观认识后 ,再对生物反应器填埋场渗滤液处理工艺进行针对性的选择和设计 ,并宜采用物化法处理方式。

摘要：The conventional microwell-based platform for construction of organoid models exhibits limitations in precision oncology applications because of low-speed growth and high variability. Here, we established organoid models on a nested array chip for fast and reproducible drug testing using 50% matrigel. First, we constructed mouse small intestinal and colonic organoid models. Compared with the conventional microwell-based platform, the mouse organoids on the chip showed accelerated growth and improved reproducibility due to the nested design of the chip. The design of the chip provides miniaturized and uniform shaping of the matrigel that allows the organoid to grow in a concentrated and controlled manner. Next, a patient-derived organoid(PDO) model from colorectal cancer tissues was successfully generated and characterized on the chip. Finally, the PDO models on the chip, from three patients, were implemented for high-throughput drug screening using nine treatment regimens. The drug sensitivity testing on the PDO models showed good quality control with a coefficient of variation under 10% and a Z’ factor of more than 0.7. More importantly, the drug responses on the chip recapitulate the heterogeneous response of individual patients, as well as showing a potential correlation with clinical outcomes. Therefore,the organoid model coupled with the nested array chip platform provides a fast and reproducible means for predicting drug responses to accelerate precise oncology.