检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

职业教育经济效益测量及其效益提升研究

天津职业大学学报 2017年第4期26卷 16-19页

作者：董治委江西科技师范大学江西南昌330013

与普通教育相比,职业教育更贴近于区域经济建设,因此,其对区域经济发展贡献更明显。然而,基于科学的经济价值理论对职业教育经济效益进行测量及提升便成为实践层面的现实问题。为此,基于马克思教育经济价值理论提出提升职业教育经济效... 详细信息

与普通教育相比,职业教育更贴近于区域经济建设,因此,其对区域经济发展贡献更明显。然而,基于科学的经济价值理论对职业教育经济效益进行测量及提升便成为实践层面的现实问题。为此,基于马克思教育经济价值理论提出提升职业教育经济效益的有效策略:职业学校专业设置的优化、职业学校规模适度、职业学校的布局合理。

关键词：职业教育经济效益提升

螺旋型爆磁压缩脉冲发生器2维磁流体力学数值模拟

在线全文

学校读者我要写书评

暂无评论

强激光与粒子束 2008年第2期20卷 259-262页

作者：赵强董志伟袁光伟王贵荣杨显俊北京应用物理与计算数学研究所北京100088

基于任意拉氏-欧拉方法的2维磁流体力学程序APMFCG被用于简单绕制的螺旋型爆磁压缩脉冲发生器动力学过程的模拟,给出了德克萨斯技术大学简单绕制的爆磁压缩发生器数值计算结果,输出电流和线圈电感的模拟结果与实验测量基本吻合。该程序... 详细信息

基于任意拉氏-欧拉方法的2维磁流体力学程序APMFCG被用于简单绕制的螺旋型爆磁压缩脉冲发生器动力学过程的模拟,给出了德克萨斯技术大学简单绕制的爆磁压缩发生器数值计算结果,输出电流和线圈电感的模拟结果与实验测量基本吻合。该程序也用于研究由于种子电流的不同所导致的欧姆电阻非线性效应对爆磁压缩过程的影响,实验结果证明了该程序计算的可靠性。

关键词：螺旋型爆磁压缩发生器磁流体力学程序电流放大磁通损失种子电流

硅橡胶中纳米二氧化钛对白色念珠菌生长影响的初探

在线全文

学校读者我要写书评

暂无评论

中华口腔医学杂志 2008年第6期43卷 367-369页

作者：李蓓赵铱民杨聚才韩颖董智伟第四军医大学口腔医学院修复科西安710032 第四军医大学口腔医学院检验科西安710032

目的通过研究纳米二氧化钛对硅橡胶体外抗白色念珠菌性能的影响，探讨用纳米二氧化钛改善硅橡胶抗白色念珠菌性能的可靠性。方法硅橡胶中加入质量分数分别为0．5％、1．0％、1．5％、2．0％的纳米二氧化钛抗菌剂，分别记为A、B、C、D组... 详细信息

目的通过研究纳米二氧化钛对硅橡胶体外抗白色念珠菌性能的影响，探讨用纳米二氧化钛改善硅橡胶抗白色念珠菌性能的可靠性。方法硅橡胶中加入质量分数分别为0．5％、1．0％、1．5％、2．0％的纳米二氧化钛抗菌剂，分别记为A、B、C、D组，对照组硅橡胶不加纳米二氧化钛，采用薄膜密着法在光照和无光照条件下测定各组硅橡胶对白色念珠菌的抗菌作用。结果光照条件下，A、B、C、D组菌落数[分别为（439．0±21．9）CFU、（289．3±7．8）CFU、（173．0±7．6）CFU、（86．7±3．9）CFU]与对照组[（597．3±5．5）CFU]的差异均有统计学意义（P〈0．05）；非光照条件下，A、B、C、D组菌落数[分别为（543．7±22．8）CFU、（478．0±17．0）CFU、（422．7±21．8）CFU、（283．0±12．1）CFU]与对照组[（611．3±10．0）CFU]的差异均有统计学意义（P〈0．05）。D组抗菌性能最好，无光照条件下，抑菌率为53．7％；光照条件下，抑菌率可达85．9％。结论添加了纳米二氧化钛抗菌剂的硅橡胶在光照和无光照条件下均能抑制白色念珠菌生长，随着纳米二氧化钛质量分数的增加，硅橡胶抑菌效果增强。纳米二氧化钛质量分数相同时，光照下硅橡胶的抑菌性比无光照强。

关键词：弹性聚硅酮类念珠菌,白色纳米结构二氧化钛

Spatial Characteristics of the Plasma Spark Source Wavelet

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2025年第1期24卷 103-112页

作者： wei Jia HAO Xiaozhu FENG Jing YANG Rui XING Lei LIU Huaishan WANG wei WU zhiqiang ZHANG dong LI Linwei Qingdao Institute of Marine Geology CGSQingdao 266071China Key Laboratory of Marine Mineral Resources Ministry of Natural ResourcesGuangzhou Marine Geological SurveyGuangzhou 511458China College of Marine Geosciences Ocean University of ChinaQingdao 266100China Center for Biomedical Materials and Interfaces Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Plasma spark sources are widely used in high-resolution seismic ***,research on the excitation mechanism and propagation characteristics of plasma spark sources is very *** this study,we elaborated on the excitation process of corona discharge plasma spark source based on indoor experimental *** electrode spacing has a direct impact on the movement of *** the spacing between bubbles decreases,they collapsed and fused,thereby suppressing the secondary pulse *** on the premise of linear arrangement and equal energy synchronous excitation,the motion equation of multiple bubbles under these conditions was derived,and a calculation method for the near-field wavelet model of plasma spark source was *** simulated the source signals received in different directions and constructed a spatial wavelet face *** with traditional far-field wavelets,the spatial wavelet facial feature representation method provides a more comprehensive display of the variation characteristics and propagation properties of source wavelets in three-dimensional *** spatial wavelet variation process of the plasma spark source was analyzed,and the source depth and the virtual reflection path are the main factors affecting the *** high-frequency properties of plasma electric spark source wavelets lead to their sensitivity to factors such as wave fluctuations,position changes,and environmental *** changes in collection parameters may result in significant changes in the recorded waveform and final data ***,the facial feature method provides more effective technical support for wavelet evaluation.

关键词： plasma spark source seismic wavelet spatial characteristics facial features

I_(2)-DMSO mediated tetra-functionalization of enaminones for the construction of novel furo[2,3:4,5]pyrimido[1,2-b]indazole skeletons via in situ capture of ketenimine cations

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第1期36卷 277-282页

作者： You Zhou Li-Sheng Wang Shuang-Gui Lei Bo-Cheng Tang zhi-Cheng Yu Xing Li Yan-dong Wu Kai-Lu Zheng An-Xin Wu National Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs The First Dongguan Affiliated HospitalSchool of PharmacyGuangdong Medical UniversityDongguan 523808China State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHong Kong SAR 999077China

The first-ever synthesis of the unknown furo[2,3:4,5]pyrimido[1,2-b]indazole skeleton was demonstrated based on the undiscovered tetra-functionalization of enaminones,with simple substrates and reaction *** key to realizing this process lies in the multiple trapping of the in situ generated ketenimine cation by the 3-aminoindazole,which results in the formation of four new chemical bonds and two new rings in one ***,the products of this new reaction were found to exhibit aggregationinduced emission(AIE)without modification.

关键词： Unknown skeleton Tetra-functionalization Ketenimine cations Aggregation-induced emission

Ultrafast sodium storage of alkylamine molecule tailored MnPS_(3) enabled by quasi-topological intercalation mechanism

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第2期68卷 552-560页

作者： Xueyang Tu Ke Fan Baixin Peng Zhuoran Lv Yiran Hao Wujie dong wei Zhao Zuocheng Wang Haitao Huang Yuqiang Fang Fuqiang Huang State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Zhangjiang Institute for Advanced Study Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong 999077China Jiangxi Far East Battery Co. Ltd.Yichun 330600China

Two-dimensional transition metal trithiophosphates(TMPS_(3),TM=Mn,Fe,Co,etc.)are competitive anode materials for sodium-ion batteries(SIBs)due to their high theoretical capacity(>1,300 mAh g^(−1))but suffer from limited practical capacity(~300 mAh g^(−1))and inferior rate capability caused by sluggish Na+intercalation/deintercalation kinetics and severe structural ***,alkylamine molecules are first proposed as intercalation guests to significantly boost the electrochemical activity and stability of MnPS_(3).Compared to MnPS_(3),C3H9N-MnPS_(3) enlarges the interlayer spacing from 6.48 to 10.23Åand shows a 105 times higher electrical conductivity,which provides fast ion/electron transport and high strain adaptability,realizing a quasi-topological Na+intercalation ***,C3H9N-MnPS_(3) exhibits an ultrahigh reversible capacity of 775 mAh g^(−1) at 0.5 A g^(−1) and superior high-rate cycling stability with~100%capacity retention after 2,500 cycles at 15 A g^(−1),ranking it among the top metal trithiophosphate-based anode materials *** calculations indicate that the improved sodium storage performance of C3H9N-MnPS_(3) results from the reduced bonding energy of P–S bonds and increased adsorption energy of Na^(+).This work is expected to provide an efficient strategy for the design of high-performance layered anode materials for SIBs.

关键词： transition metal trithiophosphates intercalation guest sodium-ion batteries quasi-topological intercalation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

FCC澄清油炭化产物电流变液的特性研究

石油化工 2001年第6期30卷 460-463页

作者：王春慧董鹏孙志伟石油大学(北京)重质油加工国家重点实验室北京102200

考察了四种FCC澄清油炭化产物电流变液的电流变特性 ,研究了炭化深度对电流变特性的影响 ,比较FCC澄清油炭化产物电流变液与渣油炭化产物电流变液的电流变特性。结果表明 :FCC澄清油炭化产物电流变液具有很好的电流变特性 ,可作为一种... 详细信息

考察了四种FCC澄清油炭化产物电流变液的电流变特性 ,研究了炭化深度对电流变特性的影响 ,比较FCC澄清油炭化产物电流变液与渣油炭化产物电流变液的电流变特性。结果表明 :FCC澄清油炭化产物电流变液具有很好的电流变特性 ,可作为一种高性能电流变液 ,其流变曲线可用Bingham模型描述 ;FCC澄清油炭化产物电流变液与中间相沥青及碳纤维前体炭化产物电流变液一样 ,都存在一最佳C/H原子比 ;FCC澄清油炭化产物电流变液的电流变特性优于渣油炭化产物电流变液的电流变特性 ,并对试验结果进行了讨论。

关键词： FCC澄清油电流变效应电流变液炭化智能材料

Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle Hou Jingjing dong dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

在线全文

学校读者我要写书评

暂无评论

磁压对级联爆磁压缩脉冲发生器性能的影响

强激光与粒子束 2007年第6期19卷 893-896页

作者：董志伟于翠影王玉芝王贵荣杨显俊赵强北京应用物理与计算数学研究所北京100088

为了研究负载为μH量级的间接馈电两级级联柱-锥构型的爆磁压缩产生器的基本物理过程和能量转换机理,利用描述爆磁压缩物理过程的2维爆轰磁流体力学程序MFCG(Ⅴ),以实验模型结构参数为基础模拟计算了一系列模型,分析了磁压对金属套筒径... 详细信息

为了研究负载为μH量级的间接馈电两级级联柱-锥构型的爆磁压缩产生器的基本物理过程和能量转换机理,利用描述爆磁压缩物理过程的2维爆轰磁流体力学程序MFCG(Ⅴ),以实验模型结构参数为基础模拟计算了一系列模型,分析了磁压对金属套筒径向膨胀速度及膨胀过程的影响。计算结果表明:套筒的径向膨胀速度取决于爆轰压与磁压的共同作用,在爆磁压缩过程的绝大部分时间里,向外膨胀的爆轰压都远大于向内压缩的磁压,因而套筒的径向膨胀速度主要是由爆轰压决定;但是在功率放大级的后半段,也就是发生器电流增长最快阶段,磁压也迅速增长,它的增长大大降低了套筒的径向膨胀速度;在功率放大级的后期,磁压已经超过爆轰压,它对系统设计的影响已经不能完全忽略。

关键词：爆磁压缩产生器能量放大级功率放大级磁压磁流体力学