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计算机网络课程教学的改革新策略研究

湖北开放职业学院学报 2024年第11期37卷 191-192,195页

作者：李永娜驻马店职业技术学院河南驻马店463000

当下,各行各业都存在信息化网络,且网络元素也是许多学生生活中不可或缺的一部分,信息化网络为社会发展带来巨大动力,如此就意味着学校需要重视计算机网络课程教学,全面培养学生良好的计算机素养与能力,进而为学生个人和社会未来良好发... 详细信息

当下,各行各业都存在信息化网络,且网络元素也是许多学生生活中不可或缺的一部分,信息化网络为社会发展带来巨大动力,如此就意味着学校需要重视计算机网络课程教学,全面培养学生良好的计算机素养与能力,进而为学生个人和社会未来良好发展奠定基础。鉴于此,为提高计算机网络课程教学效果,加强计算机网络课程教学的改革,需要合理分析计算机网络课程教学的改革价值,针对其教学出现的教学内容相对滞后等现状,从调整教学内容等改革新策略出发,提高课程教学改革效果。

关键词：计算机网络课程教学改革

Machine learning for carbonate formation drilling: Mud loss prediction using seismic attributes and mud loss records

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Petroleum Science 2024年第2期21卷 1241-1256页

作者： Hui-Wen Pang Han-Qing Wang Yi-Tian Xiao Yan Jin Yun-Hu Lu yong-Dong Fan Zhen Nie national Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Science China University of Petroleum-BeijingBeijing102249China Petroleum Exploration and Production Research Institute SINOPECBeijing102206China College of Petroleum Engineering China University of Petroleum-BeijingBeijing102249China Research Institute of Petroleum Exploration and Development CNPCBeijing100083China

Due to the complexity and variability of carbonate formation leakage zones, lost circulation prediction and control is one of the major challenges of carbonate drilling. It raises well-control risks and production expenses. This research utilizes the H oilfield as an example, employs seismic features to analyze mud loss prediction, and produces a complete set of pre-drilling mud loss prediction solutions. Firstly, 16seismic attributes are calculated based on the post-stack seismic data, and the mud loss rate per unit footage is specified. The sample set is constructed by extracting each attribute from the seismic trace surrounding 15 typical wells, with a ratio of 8:2 between the training set and the test set. With the calibration results for mud loss rate per unit footage, the nonlinear mapping relationship between seismic attributes and mud loss rate per unit size is established using the mixed density network ***, the influence of the number of sub-Gausses and the uncertainty coefficient on the model's prediction is evaluated. Finally, the model is used in conjunction with downhole drilling conditions to assess the risk of mud loss in various layers and along the wellbore trajectory. The study demonstrates that the mean relative errors of the model for training data and test data are 6.9% and 7.5%, respectively, and that R2is 90% and 88%, respectively, for training data and test data. The accuracy and efficacy of mud loss prediction may be greatly enhanced by combining 16 seismic attributes with the mud loss rate per unit footage and applying machine learning methods. The mud loss prediction model based on the MDN model can not only predict the mud loss rate but also objectively evaluate the prediction based on the quality of the data and the model.

关键词： Lost circulation Risk prediction Machine learning Seismic attributes Mud loss records

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草菇复合保鲜工艺研究

合肥工业大学学报（自然科学版） 2024年第4期47卷 522-526,547页

作者：许嘉麒刘咏董娜王军辉合肥工业大学农产品生物化工教育部工程研究中心安徽合肥230601 合肥工业大学安徽省农产品精深加工重点实验室安徽合肥230601 合肥工业大学食品与生物工程学院安徽合肥230601

草菇(Volvariella volvacea)是营养丰富的高温菌类,保鲜是草菇生产流通环节中的难点。文章以草菇质量损失率、自溶指数、腐烂指数和褐变度等为评价指标,通过单因素试验和正交试验研究温度、1-甲基环丙烯(1-MCP)体积比和乙醇体积比等对... 详细信息

草菇(Volvariella volvacea)是营养丰富的高温菌类,保鲜是草菇生产流通环节中的难点。文章以草菇质量损失率、自溶指数、腐烂指数和褐变度等为评价指标,通过单因素试验和正交试验研究温度、1-甲基环丙烯(1-MCP)体积比和乙醇体积比等对草菇保鲜效果的影响。研究结果表明:草菇复合保鲜工艺条件是保鲜温度为13℃、1-MCP体积比为30μL/L、乙醇体积比为200μL/L;在该条件下贮藏的草菇褐变度较低、蛋白质和总糖损失较少,综合变化值最小。进一步分析表明,与UV-B辐照保鲜、乙醇保鲜、1-MCP保鲜、低温保鲜等传统单一保鲜工艺相比,复合保鲜工艺处理过的草菇在贮藏过程中质量损失率、自溶指数、腐烂指数、维生素C质量比的损失等均有所降低,保鲜效果更好。研究结果为草菇复合保鲜工艺的开发提供了理论依据。

关键词：草菇复合保鲜正交优化理化指标

制造业企业敏捷性形成机理及底层数据逻辑研究

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管理案例研究与评论 2024年第3期17卷 398-413页

作者：张娜李志兰冯永春河南财经政法大学工商管理学院郑州450046 天津财经大学商学院天津300222

基于数据赋能的视角,以郑州大信家居有限公司为例,探讨了制造业企业敏捷性形成机理及底层数据逻辑。研究发现:通过数据赋能,制造业企业可以获得智能能力、连接能力及分析能力,并在这三种能力的驱动下,进行业务流程的数据解构、业务流程... 详细信息

基于数据赋能的视角,以郑州大信家居有限公司为例,探讨了制造业企业敏捷性形成机理及底层数据逻辑。研究发现:通过数据赋能,制造业企业可以获得智能能力、连接能力及分析能力,并在这三种能力的驱动下,进行业务流程的数据解构、业务流程的数据关联及业务流程的数据重构,最终实现制造业企业敏捷性。其中,数据赋能、业务流程的数据解构和业务流程的数据关联是制造业企业敏捷性形成的前置要素,业务流程的数据重构是制造业企业敏捷性形成的直接路径。还对制造业企业敏捷性形成的底层数据逻辑及其相关维度构成进行了分析。研究结果对制造业企业敏捷性形成机理进行了探索和拓展,对其底层数据逻辑进行了补充和完善。

关键词：数据赋能制造业企业敏捷性底层数据逻辑

MCSTransWnet:A new deep learning process for postoperative corneal topography prediction based on raw multimodal data from the Pentacam HR system

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Medicine in Novel Technology and Devices 2024年第1期21卷 53-63页

作者： nan Cheng Zhe Zhang Jing Pan Xiao-na Li Wei-Yi Chen Guang-Hua Zhang Wei-Hua Yang College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030600ShanxiChina Shenzhen Eye Hospital Jinan UniversityShenzhen Eye InstituteShenzhen 518040GuangdongChina Department of Intelligence and Automation Taiyuan UniversityTaiyuan 030032ShanxiChina Graphics and Imaging Laboratory University of GironaGirona 17004Spain

This work provides a new multimodal fusion generative adversarial net(GAN)model,Multiple Conditions Transform W-net(MCSTransWnet),which primarily uses femtosecond laser arcuate keratotomy surgical parameters and preoperative corneal topography to predict postoperative corneal topography in astigmatism-corrected *** MCSTransWnet model comprises a generator and a discriminator,and the generator is composed of two *** first sub-generator extracts features using the U-net model,vision transform(ViT)and a multi-parameter conditional module branch.The second sub-generator uses a U-net network for further image *** discriminator uses the pixel discriminator in ***,most GAN models are convolutional neural networks;however,due to their feature extraction locality,it is difficult to comprehend the relationships among global ***,we added a vision Transform network as the model branch to extract the global *** is normally difficult to train the transformer,and image noise and geometric information loss are ***,we adopted the standard U-net fusion scheme and transform network as the generator,so that global features,local features,and rich image details could be obtained *** experimental results clearly demonstrate that MCSTransWnet successfully predicts postoperative corneal topographies(structural similarity=0.765,peak signal-to-noise ratio=16.012,and Fréchet inception distance=9.264).Using this technique to obtain the rough shape of the postoperative corneal topography in advance gives clinicians more references and guides changes to surgical planning and improves the success rate of surgery.

关键词： Deep learning Generative adversarial networks Corneal topography Transformer W-net U-net Medical imaging Multimodal fusion

外源生物强化下水稻秸秆好氧-厌氧两相发酵产甲烷特性研究

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农业机械学报 2024年第8期55卷 401-409页

作者：何董罗立娜徐名汉刘莹丁清华孙勇秦楠广东省新能源和可再生能源研究开发与应用重点实验室广州510640 东北农业大学工程学院哈尔滨150030 黑龙江省寒地农业可再生资源利用技术及装备重点实验室哈尔滨150030 中国农业机械化科学研究院集团有限公司农业装备技术全国重点实验室北京100083 黑龙江农垦管理干部学院哈尔滨150090 潍坊理工学院现代农业与环境学院潍坊262500 山东禄禧大盛环保科技有限公司潍坊262128 农业农村部生猪养殖设施工程重点实验室哈尔滨150030

采用生物强化方法强化水稻秸秆好氧水解过程,并研究绿色木霉及添加量(占总料液质量分数3%、5%、7%和9%)对其发酵特性的影响。好氧水解阶段生物强化时间为24 h,随后在35℃条件下进行厌氧发酵产甲烷潜力测试试验。结果表明,与对照组相比,... 详细信息

采用生物强化方法强化水稻秸秆好氧水解过程,并研究绿色木霉及添加量(占总料液质量分数3%、5%、7%和9%)对其发酵特性的影响。好氧水解阶段生物强化时间为24 h,随后在35℃条件下进行厌氧发酵产甲烷潜力测试试验。结果表明,与对照组相比,添加绿色木霉进行生物强化各组的木质纤维素降解率、挥发性脂肪酸(VFAs)产量及产气率均有不同程度的提高,VFAs均以乙酸为主。利用Modified Gompertz对累积产甲烷量进行拟合,拟合结果较好,绿色木霉添加量为3%、5%、7%、9%的各预处理试验组累积产甲烷量分别为198.28、211.351、228.44、234.78 mL/g,比CK对照组产甲烷量分别提高18.89%、26.72%、36.96%、40.76%,添加7%绿色木霉组的综合效果最好,在此条件下半纤维素、纤维素、木质素降解率分别为36.86%、31.57%、7.43%,甲烷产量较CK组提高36.96%。好氧水解过程中优势菌群为厚壁菌门(Firmicutes)、绿弯菌门(Chloroflexi)、变形菌门(Proteobacteria)、拟杆菌门(Bacteroidetes)等,其中厚壁菌门(Firmicutes)相对丰度随水解时间的延长而减少,绿弯菌门(Chloroflexi)和拟杆菌门(Bacteroidetes)相对丰度增加,表明添加菌剂能够改变菌群结构,促进好氧水解反应的进行。

关键词：水稻秸秆厌氧发酵好氧水解生物强化绿色木霉产甲烷特性

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Improving Thermal-oxidative Aging Resistance of Styrene-butadiene Rubber by Antioxidant Loaded Silica Aerogel

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Chinese Journal of Polymer Science 2024年第8期42卷 1198-1209页

作者： Xue-Fei Ping Yu Wang Lu Liu Fu-yong Liu Hong-Wei He Pi Wang Wen-Wen Yu Qiang Zheng College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058China

The antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine(4010na)was dissolved in ethanol and impregnated into silica aerogel(SAG)via vacuum-pressure cycles,yielding composite particles(A-N)with enhanced sustained-release and reinforcing *** effect of A-N on the mechanical properties and thermal-oxidative aging resistance of styrene-butadiene rubber(SBR)vulcanizates was *** and BET assessments indicated that the loading efficiency of 4010na in SAG reached 14.26%within ethanol's solu bility *** A-N into SBR vulcanizates significantly elevated tensile strength by 17.5%and elongation at break by 41.9%over those with fumed silica and ***,A-N notably enhanced the thermal-oxidative aging resistance of *** aging for 96 h at 100℃,the tensile strength and elongation at break of SBR with A-N sustained 70.09%and 58.61%of their initial values,respectively,with the retention rate of elongation at break being 62.8%higher than that of SBR with fumed silica and free *** study revealed that A-N composite particles significantly inhibited the crosslinking in SBR's molecular chains,reducing hardening and embrittlement during later thermal-oxidative aging stages.

关键词： Styrene-butadiene rubber Silica aerogel Loading modification Thermal-oxidative aging

On-chip ultra-high rejection and narrow bandwidth filter based on coherency-broken cascaded cladding-modulated gratings

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Photonics Research 2024年第5期12卷 979-985页

作者： JINZHAO WANG TING LI YANG FENG JIEWEN LI WANXIN LI LUWEI DING yong YAO JIAnaN DUAN WEI LIU FENG HE YI ZOU XIAOCHUAN XU Guangdong Provincial Key Laboratory of Integrated Photonic-Electronic Chip Guangdong Provincial Key Laboratory of Aerospace Communication and Networking TechnologyHarbin Institute of TechnologyShenzhenShenzhen 518055China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China

Bragg filters are of essential importance for chip-scale photonic ***,the implementation of filters with sub-nanometer bandwidth and rejection beyond 70 dB is hindered by the high index contrast of the siliconon-insulator platform,which makes filters prone to fabrication *** this paper,we propose to combine coherency-broken cascading architecture and cladding modulation to circumvent the intrinsic *** cascading architecture effectively prevents the accumulation of phase errors,while the cladding modulation offers additional design freedom to reduce the coupling coefficient.A bimodal Bragg filter with a testingequipment-limited rejection level of 74 dB and a 40 dB bandwidth of 0.44 nm is experimentally *** minimum feature size is 90 nm,which significantly relieves the fabrication constraints.

关键词： filter cladding narrow

Structural engineering of hard carbon through spark plasma sintering for enhanced sodium-ion storage

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Rare Metals 2024年第9期43卷 4274-4285页

作者： Hao-Ming Xiao Heng Zheng Ping Yuan Jun-Hui Luo Lin-Lin Shen Jie-Feng Tan Xian-You Luo De Li yong Chen Guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan University State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan University

Hard carbon （HC） has emerged as one of the superior anode materials for sodium-ion batteries （SIBs）,with its electrochemical performance significantly influenced by the presence of oxygen functional groups and its closed pore ***,current research on the structural adjustment of these oxygen functional groups and the closed pore architecture within HC remains ***,energy-efficient and contamination-free spark plasma sintering technology was employed to tune the structure of coconut-shell HC,resulting in significant adjustments to the content of carboxyl （decreasing from 5.71 at%to 2.12 at%） and hydroxyl groups （decreasing from 7.73 at % to 6.26 at%）.Crucially,these modifications reduced the irreversible reaction of oxygen functional groups with na+.Simultaneously,a substantial number of closed pores with an average diameter of 1.22 nm were generated within the HC,offering an ideal environment for efficient na+*** structural changes resulted in a remarkable improvement in the electrochemical performance of the modified *** reversible specific capacity of the modified HC surged from 73.89 mAh·g-1to an impressive 251.97 m Ah·g-1at a current density of 50 mA·*** at 400 mA·g-1,the reversible specific capacity increased significantly from 14.55 to 85.44 mAh·***,this study provides a novel perspective for designing tailored HC materials with the potential to develop high-performance SIBs.

关键词： Closed pores Hard carbon Oxygen functional groups Sodium-ion batteries Spark plasma sintering