Hydrothermal Synthesis and Structural Characterization of a Novel 3-D Open Framework Zinc Phosphate Microporous Compound(C_5N_2H_(14))·[Zn_3(OH_2)(PO_4)_2(HPO_4)]

One novel organically templated zincophophate （CsN2HI4）.[Zn3（OH2）（POn）2（HPO4）] has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction together with elemental analysis, infrared spectroscopy, thermogravimetric analysis, and powder X-ray diffraction. The title compound crystallizes in the monoclinic space group P21/n, with a = 9.7904（11）, b = 14.0287（14）, c = 11.8651（13） A, β= 104.690（3）°, V= 1576.4（3） A^3, Z= 4, T= 296（2） K, Mr = 601.31 and Dc = 2.533 g/cm^3. The compound consists of a macroanionic [Zn3（OH2）（PO4）2（HPO4）]^2- framework and （C5N2H14）^2＋ cations, and its structure is built up from ZnO3（OH2）, ZnO4, HPO4 and PO4 tetrahedral units that result in 4, 8 and 10-ring channels.

Room-temperature synthesis of layered open framework cathode for sodium-ion batteries

The synthesis of active electrode materials at room temperature is one of the effective strategies to reduce the fabrication cost of sodium ion batteries(SIBs).Herein,a layered material(Na_(2)[(VO)_(2)(HPO_(4))_(2)C_(2)O_(4)]·2H_(2)O,abbreviated as NVPC followingly)with open-framework structures has been successfully prepared at room temperature under ambient conditions and is evaluated as a cathode for SIBs.It is revealed that NVPC cathode can deliver a maximum reversible capacity of ca.70 mAh/g at 10 mA/g,and exhibit superior rate capability and cycling performance:at 50 mA/g,maximum reversible capacity ca.50 m Ah/g with capacity retention of 88.4%over 250 cycles corresponds to only 0.046%capacity decay per cycle;at 100 mA/g,a maximum reversible capacity of 35 mAh/g with capacity retention of60.9%over 500 cycles.This study demonstrates a practical example of a low-cost synthesis of the cathode materials for SIBs.At the same time,the systematic electrochemical research results also show promising prospects for long lifespan low-cost SIBs.

Preparation and Composition-Structure-Thermal Stability Relation of a Novel Open-framework Vanadium Phosphate(H_3NCH_2CH_2NH_3)_3[(VO)_4(PO_4)_2(HPO_4)_4]

A novel open-framework vanadium(W) phosphate(H_3NCH_2CH_2NH_3)_3[(VO)_4(PP_4)_2(HPO_4)_4] (short for V_2P_3-en) has been prepared. It issynthesized hydrothermally in the presence of ethylenediamine (en) at 170 deg C for 5 days byself-assembly from structurally simple precursors V_2O_5, H_3PO_4 and H_2O. The compound ischaracterized by means of Fourier transform-infrared spectroscopy (FT-IR),Thermogravimetry-differential thermal analysis (TG-DTA), X-ray powder diffraction analysis (XRD) andScanning electron microscopy (SEM). Furthermore, the composition-structure-thermal stabilityrelation of V_2P_3-en is explored in terms of crystal chemistry, and the potential approach to theenhancement of its thermal stability is proposed.

Crystalline and amorphous Mn0_(2)cathodes with open framework enable high-performance aqueous zinc-ion batteries

Currently,δ-Mn0_(2)is one of the popularly studied cathode materials for aqueous zinc-ion batteries(ZIBs)but impeded by the sluggish kinetics of Zn^(2+)and the Mn cathode dissolution.Here,we report our discovery in the study of crystalline/amorphous Mn0_(2)(disordered Mn0_(2)),prepared by a simple redox reaction in the order/disorder engineering.This disordered Mn0_(2)cathode material,having open framework with more active sites and more stable structure,shows improved electrochemical performance in 2 mol L^(-1)ZnSO_(4)/0.1 mol L^(-1)MnS0_(4)aqueous electrolyte.It delivers an ultrahigh discharge specific capacity of 636 mA·h·g^(-1)at 0.1 A·g^(-1)and remains a large discharge capacity of 216 mA·h·g^(-1)even at a high current density of 1 A·g^(-1)after 400 cycles.Hence disordered Mn0_(2)could be a promising cathode material for aqueous ZIBs.The storage mechanism of the disordered Mn0_(2)electrode is also systematically investigated by structural and morphological examinations of ex situ,ultimately proving that the mechanism is the same as that of the δ-Mn0_(2)electrode.This work may pave the way for the possibility of using the order/disorder engineering to introduce novel properties in electrode materials for high-performance aqueous ZIBs.

Cubic perovskite fluoride as open framework cathode for Na-ion batteries

Subject Code:E02With the support by the National Natural Science Foundation of China,a study by the research group led by Prof.Li Chilin(李驰麟)from Shanghai Institute of Ceramics,Chinese Academy of Sciences reported that a cubic perovskite fluoride can serve as open framework cathode for high-rate

OPEN Process Framework软件工程框架研究与应用

OPEN Process Framework(OPF)是使软件开发过程达到CMM5级标准的软件工程框架。文中讨论了基于OPF的软件过程的主要元素及实施过程,并把该过程应用于某油田数据采集系统的开发,实践证明基于OPF的软件过程可以提高团队的开发能力、降低风险、有效控制资源,为项目的开发提供了高度清晰的过程框架,规范管理和开发流程。

A Novel Three-dimensional Inorganic Open-framework Constructed from [Mo_4O_(16)]_n ^(8n-) Chains Linked through Ag^+

A novel 3-D inorganic bimetallic compound Ag2Mo2O7 has been hydrothermally synthesized and structurally characterized by X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 6.1274（3）, b = 13.1836（6）, c = 7.8780（3）A, β= 110.673（3）°, V = 595.42（5）A3, Z= 4, Mr= 519.62, Dc = 5.797g/cm^3, F（000） = 936,μ（MoKα） = 10.579 mm^-1, F（000） = 936, the final R = 0.0204 and wR = 0.0477 for 1268 observed reflections with I〉 2σ（I）. In the title compound, the [Mo4O16]n^8n-chains are linked through O-Ag-O bridging bonds to form a 3D network. It represents an unprecedented linking mode between the isopolyoxomolybdate chain and the transition metal oxide cluster. IR, TGA and fluorescence properties of the title compound are also studied.

基于TOE框架的公共数据开放利用水平影响因素及提升路径分析

[目的/意义]揭示公共数据开放利用多重影响因素耦合下的多元路径,有助于深化理解公共数据利用联动效应,促进数据价值释放。[方法/过程]以27个省份为研究对象,基于TOE框架构建公共数据开放利用影响因素框架,通过模糊集定性比较分析和必要条件分析的方法进行组态路径分析,最终基于组态分析结果提出相应路径提升对策。[结果/结论]高与非高公共数据开放利用均存在4类组态路径,为其他地区因地制宜提升公共数据开放利用水平提供了路径借鉴。我国各地方应遵循国家公共数据开放指导思想,结合地方优势和特点选择适宜的路径以提升公共数据开放利用水平。

基于OpenStack的中小企业服务云平台架构研究

根据中小企业信息服务平台建设需求,解决传统中小企业信息系统竖井式部署带来的管理分散、资源利用率低等问题,提出中小企业服务平台的整体框架,并基于OpenStack开源云框架对中小企业云平台进行实验部署,最后对中小企业服务云平台的高可用性技术进行初探。结果表明,基于基础资源层、数据中台层、业务中台层和应用层等4层的平台框架,解决了传统信息系统竖井方式部署产生的信息孤岛问题,基于OpenStack框架搭建的原型系统验证了OpenStack较适合于建设中小企业私有云平台。

健康医疗数据开放的内涵框架、影响因素与实施路径研究

健康医疗数据在智慧医疗建设中发挥着关键作用,健康医疗数据开放的实现对推动健康医疗服务利用与健康医疗现代化治理意义重大。本文以健康医疗数据开放的原则、特征、价值和评价四个维度来构建“P-C-V-E”内涵框架,并基于该内涵框架,着重从隐私安全、数据管理和资源配置三个方面探讨健康医疗数据开放的影响因素。最后就该领域发展提出以下实施路径:强化顶层设计,保护隐私安全;完善制度体系,强化数据管理;构建运行机制,优化资源配置。

航测点之记自动生成系统设计与实现

近年来,无人机航测技术在测绘行业得到了广泛的应用,本文针对航空摄影测量像控点数量多、人工制作点之记成果工作量大且错误率高的问题,采用开源技术研发了航测点之记自动生成系统,该系统采用App实现像控点信息的外业采集,桌面软件辅助完成航片的选择和像控点位置的标记,进而自动生成点之记成果WORD文档,改变了传统作业模式,实现航测点之记的内外业一体化作业,提高工作效率。

一种基于OpenStack的云应用开发框架

云计算的迅速发展对云应用与云服务的开发提出了更高要求。然而,依靠提供商提供的云平台基本功能组件不能直接满足需求,对云平台进行二次开发会增加开发周期,降低开发速率。OpenStack是一个开源的云管理平台,为客户提供云基础架构服务,包括计算服务、存储服务和网络服务。以OpenStack为基础,针对虚拟机管理应用、存储应用和定制应用,设计并实现了一种云应用开发框架,融合了服务组合和元数据的设计思想。基于该框架实现了一个虚拟机定制系统,并验证了该设计框架的可用性和有效性。

开放大学国际化路径探索:组织变革理论视角

《国家开放大学综合改革方案》明确要求将国家开放大学打造成对外合作的主要平台,如何实现有效的国际化,成为我国开放大学亟待解决的问题。以组织变革理论为指导,分析开放大学国际化过程中的组织变革特征,从发展战略、实施技术和管理系统三个维度,构建了一个全面的分析框架,为开放大学成功实现国际化提供了具体的途径和策略参考。

基于可扩展框架的井眼轨道控制系统设计

井眼轨道控制系统包括轨道设计、丛式井防碰以及测斜数据分析处理等多个功能模块,需要满足不同井型设计、施工与数据分析的需求,同时要考虑系统可维护性、可扩展性,以满足现场应用的新需求。采用传统设计方法会面临模块化不足、维护升级困难的窘境,因此提出一种基于可扩展框架的井眼轨道控制系统软件。该软件参考开放服务网关协议(Open Service Gateway initiative,OSGi)规范,采用插件式模块化的编程思想,将系统框架与功能模块相互分离,同时使模块以插件形式加载实现前后端分离。将设计系统成功推广应用于十余口井,结果表明,系统运行稳定,界面交互方便,数据响应快速,算法维护和版本更新方便快捷,满足了现场应用新需求。该设计思路可为油气领域同类系统的架构设计提供一种有效可靠的思路,对油气井领域系统开发具有借鉴作用。

可快速重组模块化OPEN CNC软件体系结构的研究

通过对数控系统开放性的讨论,借助于目前流行的软件组件开发技术,介绍了建立可快速重组OPEN CNC软件体系的方法,并给出了一个具有很高的重用度、良好的扩展性、易移植的开放式数控系统软件框架模型。

New 3D Framework Vanadium(Ⅲ) Phosphite with One-dimensional 4,12-Member Ring Channels

A new vanadium（Ⅲ） phosphite,V2（HPO3）3（1）,was synthesized hydrothermally with V2O5,H3PO3 as reactants,1,6-diaminopropane（1,6-HAD） as the structure-directing agent and characterized by single crystal X-ray diffraction,powder X-ray diffraction,IR spectroscopy,TGA,ICP-AES and elemental analyses.Single-crystal X-ray diffraction analysis reveals that compound 1 crystallized in the P6（3）/m hexagonal space group with the unit-cell parameters：a=0.80436（10） nm,c=0.73972（2） nm,V=0.41447（13） nm^3,Z=4.The construction of 3D framework structure of compound 1 may be viewed as the assembly of V2O9 dimers and HPO3 pseudo-pyramids which lead to form the one-dimensional 4,12-member ring channels along the [001] direction.

联邦学习开源框架综述

近年来,联邦学习作为破解数据共享壁垒的有效解决方案被广泛关注,并被逐步应用于医疗、金融和智慧城市等领域.联邦学习框架是联邦学习学术研究和工业应用的基石.虽然Google、OpenMined、微众银行和百度等企业开源了各自的联邦学习框架和系统,然而,目前缺少对这些联邦学习开源框架的技术原理、适用场景、存在问题等的深入研究和比较.为此,根据各开源框架在业界的受众程度,选取了目前应用较广和影响较大的联邦学习开源框架进行深入研究.针对不同类型的联邦学习框架,首先分别从系统架构和系统功能2个层次对各框架进行剖析;其次从隐私机制、机器学习算法、计算范式、学习类型、训练架构、通信协议、可视化等多个维度对各框架进行深入对比分析.而且,为了帮助读者更好地选择和使用开源框架实现联邦学习应用,给出了面向2个不同应用场景的联邦学习实验.最后,基于目前框架存在的开放性问题,从隐私安全、激励机制、跨框架交互等方面讨论了未来可能的研究发展方向,旨在为开源框架的开发创新、架构优化、安全改进以及算法优化等提供参考和思路.