Thermophysical properties of the regolith on the lunar far side revealed by the in situ temperature probing of the Chang’E-4 mission

Temperature probes onboard the Chang’E-4 (CE-4) spacecraft provide the first in situ regolith temperature measurements from the far side of the Moon. We present these temperature measurements with a customized thermal model and reveal the particle size of the lunar regolith at the CE-4 landing site to be ∼15 μm on average over depth, which indicates an immature regolith below the surface. In addition, the conductive component of thermal conductivity is measured as ∼1.53 × 10^–3 W m^–1 K^–1 on the surface and ∼8.48 × 10^–3 W m^–1 K^–1 at a depth of 1 m. The average bulk density is ∼471 kg m^–3 on the surface and ∼824 kg m^–3 in the upper 30 cm of the lunar regolith. These thermophysical properties provide important additional ‘ground truth’ at the lunar far side, which is critical for the future analysis and interpretation of global temperature observations.     

试论网络组织人力资源管理

进入21世纪以来,随着以信息技术为代表的科学技术和社会经济的迅猛发展,企业的经营环境发生了巨大变化。作为适时而出的一种新型组织模式,网络组织向人们展现着它无限的生命力。本文聚焦于网络组织的战略资源——人力资源,较为系统地分析了网络组织人力资源管理的特点。     

国家学位论文资源共享体系研究

文章通过对我国学位论文资源管理现状和国内外信息资源共享状况进行系统分析,提出了构建国家学位论文资源共享体系的目标、原则和步骤。从组织体制、信任机制、利益机制、服务方式和采集渠道等5个方面提出了构建国家学位论文资源共享体系的实施建议。     

“城市生态学”教学中课程思政建设的探索

高等院校实施课程思政建设是全面提高人才培养质量的重要任务,更是新时代高校加强思想政治教育与人才培养工作融合的新举措。"城市生态学"是高等学校生态学专业的基础课之一。在高校推进课程思政建设的进程中,"城市生态学"课程也在积极探索思想政治融合的路径,致力于培养懂知识、有素质的人才。通过从课程思政融入"城市生态学"教学的必要性、存在问题和措施等方面进行探索,以期对高校专业课教学中融入课程思政的教学改革起到一定借鉴作用。     

A CRISPR/Cas12a-empowered surface plasmon resonance platform for rapid and specific diagnosis of the Omicron variant of SARS-CoV-2

The outbreak of the COVID-19 pandemic was partially due to the challenge of identifying asymptomatic and presymptomatic carriers of the virus, and thus highlights a strong motivation for diagnostics with high sensitivity that can be rapidly deployed. On the other hand, several concerning SARS-CoV-2 variants, including Omicron, are required to be identified as soon as the samples are identified as ‘positive’. Unfortunately, a traditional PCR test does not allow their specific identification. Herein, for the first time, we have developed MOPCS (Methodologies of Photonic CRISPR Sensing), which combines an optical sensing technology-surface plasmon resonance (SPR) with the ‘gene scissors’ clustered regularly interspaced short palindromic repeat (CRISPR) technique to achieve both high sensitivity and specificity when it comes to measurement of viral variants. MOPCS is a low-cost, CRISPR/Cas12a-system-empowered SPR gene-detecting platform that can analyze viral RNA, without the need for amplification, within 38 min from sample input to results output, and achieve a limit of detection of 15 fM. MOPCS achieves a highly sensitive analysis of SARS-CoV-2, and mutations appear in variants B.1.617.2 (Delta), B.1.1.529 (Omicron) and BA.1 (a subtype of Omicron). This platform was also used to analyze some recently collected patient samples from a local outbreak in China, identified by the Centers for Disease Control and Prevention. This innovative CRISPR-empowered SPR platform will further contribute to the fast, sensitive and accurate detection of target nucleic acid sequences with single-base mutations.     

中小学教师专业核心素养模型构建研究

中小学教师专业核心素养是中小学教师从事教育教学活动所必备的基本素质。近年来我国有学者开始关注中小学教师的核心素养问题,但采用规范的方法研究中小学教师专业核心素养的成果还较少见到。本研究运用文献法、德尔菲法和统计法研讨了中小学教师专业核心素养的因素,在此基础上构建并分析了品德修为、知识涵养和教学能力三维度的中小学教师专业核心素养模型。该模型可以为中小学选聘教师、开展教师培训、评估教师绩效及中小学教师的自我发展提供有益的参考和启示。     

任务驱动教学法下的能源与动力工程基础实验实训探索和改革

分析能源与动力工程基础实验实训现状和存在问题,将任务驱动教学法应用于基础实验实训,突出学生为主、融入新兴理念、培养创新意识、细化实训要求、完善考核机制和扎实能力培养.通过基础实验的自学和检测,锻炼学生操作实验、撰写报告和分析结果的能力.设计实验的任务驱动,给学生充分发展的平台,锻炼其自学、实践、表达和团队协作能力,培养...     

信息化对经济增长贡献研究述评

综述了信息化对经济增长贡献的研究,指出了现有工作中存在的不足,提出了进一步研究的方向。     

论数字参考咨询服务的知识管理

文章阐述了数字参考咨询服务的概念,分析了它与传统参考咨询服务的区别,总结了它的特征在于知识共享、服务共享和专家共享,并运用知识管理的有关理论对数字参考咨询如何加强知识管理提出了建议。