基于Winsock通信的远程屏幕抓取技术研究

提出一种基于Winsock通信的远程抓屏功能的实现方法。采用C／S模式,基于TCP协议进行通信,Client端调用Winsock发送截取屏幕的命令,Server端接收命令并运用Windows API函数和Winsock实现屏幕的抓取和远程数据传送;使用柯达公司的ImgEdit控件对截屏后的图像文件进行压缩,便于数据的传输;实验结果表明,该方法能方便、快捷地实现远程计算机的屏幕抓取,为远程智能监控的发展提供一种有效的软件实现方法。     

开放式创新视角下美国国家实验室大型科研基础设施共享机制研究

以开放式创新的视角详细分析美国国家实验室大型科研基础设施的4种主要共享机制,厘清其发展脉络,为我国国家实验室的建设提供理论和现实上的参考。     

新形势下中国信息产业外商直接投资初探

近年来,中国信息产业发展迅猛,而中国信息产业的发展与外商直接投资（FDI）休戚相关,它是中国吸引FDI增长最快的产业部门之一。这不仅是由于信息产业时经济发展起着领头羊作用,还在于信息产业是科技的基本载体和孕育母体,是在新科技革命条件下实现科技创新的主要舞台。     

电能计量装置在线故障诊断系统设计

电能计量装置运行的稳定性和可靠性,对于电力行业的发展至关重要,智能电网的建设过程中对电能表计量装置具有在线故障诊断功能的需求成为必然趋势.文中针对电能计量装置在线故障诊断系统中典型的故障诊断模型进行了研究,同时设计了在线故障诊断系统,详述了电能计量装置在线故障诊断系统硬件结构、软件框架以及系统方案,并针对在线故障诊断系...     

Dynamic confinement of SAPO-17 cages on the selectivity control of syngas conversion

The OXZEO (oxide−zeolite) bifunctional catalyst concept has enabled selective syngas conversion to a series of value-added chemicals and fuels such as light olefins, aromatics and gasoline. Herein we report for the first time a dynamic confinement of SAPO-17 cages on the selectivity control of syngas conversion observed during an induction period. Structured illumination microscopy, intelligent gravimetric analysis, UV-Raman, X-ray diffraction, thermogravimetry and gas chromatography-mass spectrometer analysis indicate that this is attributed to the evolution of carbonaceous species as the reaction proceeds, which gradually reduces the effective space inside the cage. Consequently, the diffusion of molecules is hindered and the hindering is much more prominent for larger molecules such as C₄₊. As a result, the selectivity of ethylene is enhanced whereas that of C₄₊ is suppressed. Beyond the induction period, the product selectivity levels off. For instance, ethylene selectivity levels off at 44% and propylene selectivity at 31%, as well as CO conversion at 27%. The findings here bring a new fundamental understanding that will guide further development of selective catalysts for olefin synthesis based on the OXZEO concept.     

Cyclic-anion salt for high-voltage stable potassium-metal batteries

Electrolyte anions are critical for achieving high-voltage stable potassium-metal batteries (PMBs). However, the common anions cannot simultaneously prevent the formation of ‘dead K’ and the corrosion of Al current collector, resulting in poor cycling stability. Here, we demonstrate cyclic anion of hexafluoropropane-1,3-disulfonimide-based electrolytes that can mitigate the ‘dead K’ and remarkably enhance the high-voltage stability of PMBs. Particularly, even using low salt concentration (0.8 M) and additive-free carbonate-based electrolytes, the PMBs with a high-voltage polyanion cathode (4.4 V) also exhibit excellent cycling stability of 200 cycles with a good capacity retention of 83%. This noticeable electrochemical performance is due to the highly efficient passivation ability of the cyclic anions on both anode and cathode surfaces. This cyclic-anion-based electrolyte design strategy is also suitable for lithium and sodium-metal battery technologies.     

A proof of concept for neutralizing antibody-guided vaccine design against SARS-CoV-2

Mutations and transient conformational movements of the receptor binding domain (RBD) that make neutralizing epitopes momentarily unavailable present immune escape routes for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To mitigate viral escape, we developed a cocktail of neutralizing antibodies (NAbs) targeting epitopes located on different domains of spike (S) protein. Screening of a library of monoclonal antibodies generated from peripheral blood mononuclear cells of COVID-19 convalescent patients yielded potent NAbs, targeting the N-terminal domain (NTD) and RBD domain of S, effective at nM concentrations. Remarkably, a combination of RBD-targeting NAbs and NTD-binding NAbs, FC05, enhanced the neutralization potency in cell-based assays and an animal model. Results of competitive surface plasmon resonance assays and cryo-electron microscopy (cryo-EM) structures of antigen-binding fragments bound to S unveil determinants of immunogenicity. Combinations of immunogens, identified in the NTD and RBD of S, when immunized in rabbits and macaques, elicited potent protective immune responses against SARS-CoV-2. More importantly, two immunizations of this combination of NTD and RBD immunogens provided complete protection in macaques against a SARS-CoV-2 challenge, without observable antibody-dependent enhancement of infection. These results provide a proof of concept for neutralization-based immunogen design targeting SARS-CoV-2 NTD and RBD.     

信用经济建设视角下我国人事档案制度改革研究

本文对信用经济建设时期我国人事档案制度的尴尬、我国人事档案制度尴尬境遇的成因、我国人事档案制度的改革路径等问题作了阐述.     

基于三维场景的地质遗迹景观精细化遥感解译

针对目前复杂地形区地貌景观地质遗迹形态特征调查困难的问题,提出应用倾斜摄影测量技术构建三维模型以提高调查精度.本文以流纹质火山岩地貌景观调查为例,以仙居神仙居国家地质公园为研究区开展研究,首次进行了复杂地貌区大范围倾斜摄影测量与基于三维场景的地质遗迹景观精细化遥感解译研究.首先应用倾斜摄影测量技术开展研究区测量获取高精...