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我国职业教育信息化回顾与展望:阶段、特征和路径

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电化教育研究 2024年第3期45卷 46-53页

作者：郭日发周潜清华大学教育研究院北京100084

职业教育信息化是教育信息化发展不可或缺的部分。研究以20世纪90年代以来的职业教育信息化相关文献和政策为基础,通过文本分析与归纳演绎的方法,从阶段、特征和路径等三个维度对我国职业教育信息化的发展历程进行了回顾,并对我国职业... 详细信息

职业教育信息化是教育信息化发展不可或缺的部分。研究以20世纪90年代以来的职业教育信息化相关文献和政策为基础,通过文本分析与归纳演绎的方法,从阶段、特征和路径等三个维度对我国职业教育信息化的发展历程进行了回顾,并对我国职业教育信息化的未来发展进行了展望。研究发现:我国职业教育信息化发展分为发展萌芽期、缓慢发展期、极速发展期和创新发展期四个阶段;各阶段特征表现为稳固基础、兼顾平衡、聚焦质量和创新发展;发展路径呈现为路径形成、路径稳定和路径革新。同时从积极落实“新基建”、技术赋能教学方式变革、数据丰富的数字资源、AI赋能“双师型”教师队伍等四个方面对职业教育信息化支撑、保障、夯实和服务人才培养的未来发展进行展望,为我国职业教育信息化发展提出可参考建议。

关键词：职业教育信息化回顾与展望阶段特征路径

Direct oxidation of methane to oxygenates over heteropolyanions

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Journal of Natural Gas Chemistry 2008年第3期17卷 309-312页

作者： Ouarda Benlounes Sadia Mansouri Chérifa.Rabia Smain Hocine Laboratoire de Chimie Appliqueé et de Génie Chimique Université Mouloud Mammeri Laboratoire de Chimie du Gaz Naturel Institut de Chimie USTHB

Partial oxidation of methane to formaldehyde and methanol was studied at atmospheric pressure in the temperature range of 700-750 °C using heteropolycompound catalysts （NH4）6HSiMo11FeO40, （NH4）4PMo11FeO39, and H4PMo11VO40, which were prepared and characterized by various analysis techniques such as infrared, visible UV, XRD and DTA. O2 or N2O was used as the oxidizing agent, and the principal products of the reaction were CH3OH, CH2O, CO, CO2, and water. The conversion and the selectivity of products depend strongly on the reaction temperature, the nature of oxidizing agent, and the composition of catalyst.

关键词： methane oxidation heteropolycompounds methanol oxygenates

Monte Carlo Simulations of Topological Properties in Two-Phase Polycrystalline Materials for Several Diffusion Mechanism

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Advances in Pure Mathematics 2020年第9期10卷 471-491页

作者： rifa.J. El-Khozondar Physics Department Al-Aqsa University Gaza Palestine

Numerical simulations by means of the Monte Carlo Potts model have been provided to simulate grain structures in two-phase polycrystalline materials. The topological features in the simulated microstructure analyzed for different diffusion mechanisms over a broad range of volume fractions for both phases. The topological properties include the average number of sides, grain topology distribution and the topological size relation function. It is found that the average number of sides depends proportionally on the volume fraction. It increases as the volumes fraction increases and vice versa. Moreover, it is shown that the grain topology distribution in the self-similar growth regime can be described by time unchanged function of the relative grain size. Additionally, topological size function in the simulated microstructure can be evaluated by a quadratic function.

关键词： Monte Carlo Potts Model Topology Distribution Polycrystalline Microstructure Diffusion Mechanisms

Regression of liver metastases of occult carcinoid tumor with slow release Lanreotide therapy

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World Journal of Gastroenterology 2005年第13期11卷 2041-2044页

作者： Marta Bondanelli Maria Rosaria Ambrosio Maria Chiara Zatelli Luigi Cavazzini Laura Al Jandali rifa.y Ettore C.degli Uberti Department of Biomedical Sciences and Advanced Therapies-Section of Endocrinology Department of Experimental and Diagnostic Medicine

Few clinical studies have demonstrated an anti-proliferative activity of somatostatin (SST) analogs in carcinoids. We report the case of a woman with liver metastases of neuroendocrine tumor and no evidence of the primary tumor. The liver metastases were characterized by high proliferation index, immunoreactiviy for somatostatin receptor (SSTR)-l, 2, 3 and 5 and positive octreoscan. Urinary 5-hydroxyindolacetic acid, serum serotonin and chromogranin A were elevated. Slow release lanreotide (SR-LAN) therapy for 3 mo controlled clinical and biochemical signs of carcinoid tumor and caused a clear-cut reduction in the diameter of two liver metastases and disappearance of another lesion, with further reduction after 6 and 18 mo. We demonstrated a clear-cut long-lasting anti-proliferative effect of SR-LAN on liver metastases of occult carcinoid with high proliferation index and immunoreactivity for SSTR-1, 2, 3, and 5. Immunohistochemistry for SSTRs could be a suitable method for the selection of patients with metastatic carcinoid that may benefit from SST analog therapy.

关键词： Carcinoid Somatostatin analogs Somatostatin receptors

Methane Steam Reforming on Supported Nickel Based Catalysts. Effect of Oxide ZrO2, La2O3and Nickel Composition

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Open Journal of Physical Chemistry 2013年第2期3卷 89-96页

作者： Akila Belhadi Mohamed Trari Chérifa.Rabia Ouiza Cherifi Laboratory of Chemistry of Natural Gas Faculty of Chemistry (USTHB) Algiers Algeria

The catalytic properties of Ni (4 and 10 wt%) supported on both La2O3 and ZrO2 were investigated for the methane steam reforming reaction between 475℃ and 700℃ at atmospheric pressure. The catalysts were prepared by the impregnation method and characterized by several techniques (atomic absorption, BET method, X-ray diffraction and TG-TPO). The catalytic activity of Ni/support systems strongly depends on both of the nature and physico-chemical properties of the support. No deactivation was observed in catalytic systems, whatever the reaction temperature indicating high stability of the catalyst.

关键词： Methane Steam Reforming Nickel Coke Supported Catalysts

The Future of ASEAN as A Regional Organization

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The Future of ASEAN as A Regional Organization

作者： MD AR-rifa.IE PD HALBI 山东大学

学位级别：硕士

With the exception of the European Union（EU）,the Association of Southeast Asian Nations（ASEAN）is certainly the most successful example of a regional grouping in the *** of ten states in a region that is typified by an extensive difference of ethnicities with different norms,values,religions and languages,ASEAN has successfully attained economic success and peace in a region that has a rich history of *** its initial establishment and potential role and influence were undermined by external observers,ASEAN has definitely proven its doubters wrong throughout its 50-year existence,with the Association managing to adjust to the varying circumstances in geopolitics and economics,becoming a calming force in advocating peace and security,as well as helping to boost the economic growth of its *** addition to this,ASEAN,as a regional organization,also saw a milestone in its integration process,with the establishment of the ASEAN Community in 2015,which is based on three pillars pertaining to economy,political-security,and ***,in spite of these successes,the integration process in ASEAN still goes through much debate by external observers and scholars alike,and rightfully *** is because the integration process in ASEAN has been mainly steered by the self-interests of states,such as sovereignty,security,and regime survival,instead of a shared goal of regional *** forms of integration in the region,such as the establishment of the AFT A and the ASEAN Community,although showing the steps ASEAN has taken to integrate its members,have been considerably limited with the Association still upholding the same principles that guided it through the 20th to the 21st *** example,in terms of the principle of conflict avoidance,although ensuring stability in the short term,these unresolved conflicts have the potential to destabilize integration in the future,thus weakening ASEAN in the ***,the

关键词： A REGIONAL ORGANIZATION FUTURE ASEAN

Catalytic Reduction of Benzaldehyde Under Hydrogen Flow over Nickel-Containing Mesoporous Silica Catalysts

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Open Journal of Physical Chemistry 2012年第1期2卷 73-80页

作者： Adel Saadi Kahina Lanasri Khaldoun Bachari Djamila Halliche Chérifa.Rabia Laboratoire de Chimie du Gaz Naturel Faculty of Chemistry University of Sciences and Technology Houari Boumediene Algiers Algeria

The hydrogenation of benzaldehyde over a series of nickel-containing mesoporous silicas with different nickel contents was studied at atmospheric pressure in the range temperature of 393 - 513 K under H2 ?ow. These materials (noted Nin-HMS with n = Si/Ni = 50, 25, 15) have been prepared at room temperature using a route based on hydrogen bonding and self-assembly between neutral primary amine micelles (S0) and neutral inorganic precursors (I0). They were characterized by their chemical analysis, BET surface area, XRD, FT-IR, and SEM microscopy. The obtained products were benzylalcohol, toluene, benzene with yields depending on the nickel content (Si/Ni ratio) and reaction temperature. The products of benzaldehyde hydrogenation (benzylalcohol, and toluene) and hydrogenolysis (benzene) were preferentially formed at low/middle and high reaction temperature respectively. The mesoporous Ni-containing materials were very active hydrogenation catalysts with almost 90% selectivity to benzylalcohol product and showed excellent stability. A mechanism in which the reaction could be initiated by a benzaldehyde reduction over Nin-HMS materials under hydrogen flow with formation of reaction products is proposed.

关键词： Nickel HMS Benzaldehyde Reduction Mesoporous Materials

Dehydrocyclization of n-Hexane over Heteropolyoxometalates Catalysts

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Advances in Chemical Engineering and Science 2013年第1期3卷 82-92页

作者： Abdellah Eid Ouarda Benlounes Hikmat S. Hilal Chérifa.Rabia Smain Hocine Laboratoire de Chimie Appliquée et de Genie Chimique Universite Mouloud Mammeri Tizi-Ouzou Algeria Laboratoire de Chimie du Gaz Naturel Institut de Chimie USTHB Alger Algeria Laboratory of Semiconductor and Solar Energy Research Chemistry Department An-Najah N. University Nablus Palestine

The catalytic dehydrocyclization of n-hexane was studied here for the first time using a number of compounds based on H3PMo12O40. The described catalysts were prepared by either replacing the acidic proton with counter-ions such as ammonium or transition metal cations (NH4+, Fe3+, K+), or by replacing Mo6+ with (Ni3+, Co3+, Mn3+) in the polyoxometalate framework, as reported earlier. For comparison purposes, the known (TBA)7PW11O39 catalyst system was used. All reactions were conducted at different temperatures in the range 200 - 450. The Keggin structure of these heteropolycompounds was ascertained by XRD, UV and IR measurements. 31P NMR measurements and thermal behaviour of the prepared catalysts were also studied. These modified polyoxometalates exhibited heterogeneous superacidic catalytic activities in dehydrocyclization of n-hexane into benzene, cyclohexane, cyclohexene and cyclohexadiene. The catalysts obtained by substituting the acidic proton or coordination atom exhibited higher selectivity and stability than the parent compound H3PMo12O40. Catalytic activity and selectivity were heavily dependent on the composition of the catalyst and on the reaction conditions. At higher temperatures, the catalyst exhibited higher conversion efficiency at the expense of selectivity. Using higher temperatures (>400) in the presence of hydrogen carrier gas, selectivity towards dehydrocyclization ceased and methane dominated. To explain the results, a plausible mechanism is presented, based on super-acidic nature of the catalyst systems.

关键词： Dehydrocyclization Heteropolyacid Catalyst n-Hexane Keggin Ion

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在线协作平台中批判性思维话语分析研究

电化教育研究 2018年第2期39卷 26-31页

作者：冷静郭日发华东师范大学上海数字化教育装备工程技术研究中心，上海 200062 华东师范大学教育信息技术学系，上海 200062

近年来,在线协作学习平台在各高校中得到普遍应用。学生在线收集信息、协作完成任务,这些问题解决活动与批判性思维密切相关。本研究选取在线学习平台——Sakai平台,设计了基于真实问题情境的促进学生批判性思维发展的在线协作学习活动... 详细信息

近年来,在线协作学习平台在各高校中得到普遍应用。学生在线收集信息、协作完成任务,这些问题解决活动与批判性思维密切相关。本研究选取在线学习平台——Sakai平台,设计了基于真实问题情境的促进学生批判性思维发展的在线协作学习活动。为了验证教学效果,本研究对上海某高校班级中55名本科生为期4个月的在线话语进行了内容分析。研究结果发现:参与在线协作讨论有助于提高学生的批判性思维,特别是真实问题解决情境使得学生能够积极运用各种批判性思维方法,和其他人分享信息、交流观点、经过深入分析及充分讨论之后产生新的知识。

关键词：批判性思维在线协作学习内容分析法