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Polyvinyl alcohol fiber cement-stabilized macadam:A review and performance evaluation

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 406-423页

作者： Chaohui Wang jikang Liu Shaochang Chen Feng Chen Zhiwei Gao School of Highway Chang'an UniversityXi'an 710064China Shaanxi Transportation Technology Consulting Co. Ltd.Xi'an 710068China School of Information Engineering Xizang Minzu UniversityXianyang 712082China

This review evaluated research results on polyvinyl alcohol fiber cement-stabilized macadam(PVA-FCSM)to further improve the long-term durability of road structures and promote its in-depth study and high-quality *** suitable PVA fiber technical indexes for ordinary cement-stabilized macadam(CSM)were *** difference in the mechanical properties between CSM and PVA-FCSM was *** extent to which PVA fibers enhance the durability of CSM were ***,the mechanism of enhancement of CSM by PVA fibers was ***,the performance of each type of fiber cement-stabilized macadam(FCSM)was compared and *** results indicated that the suggested PVA fiber length and content for CSM were 12-30 mm and 0.6-1.2 kg/m^(3),*** different ages,the mean degree of improvement in the unconfined compressive strength was 14%,20%,and 14%,that in the compressive resilience modulus was 8%,11%,and 6%,and that in the splitting strength was 29%,15%,and 22%,*** different ages,the mean degree of decreased in the dry shrinkage coefficient was 21%,16%,and 15%and that in the temperature shrinkage coefficient(20℃-30℃)was 23%,23%,and 18%,*** coefficients increased with extended curing ***,at the same stress level,PVA-FCSM has a higher fatigue life compared to *** bridging effect,high strength,and high modulus of PVA fiber enhance the strength and anti-cracking of *** recommended fiber type for CSM is PVA fiber.

关键词： Highway and railway engineering PVA fiber cement-stabilized macadam Mechanical performance Durability Enhancement mechanism Performance valuation

Particle size dependence of the microsegregation and microstructure in the atomized Ni-based superalloy powders:Theoretical and experimental study

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Journal of Materials Science & Technology 2024年第4期171卷 54-65页

作者： jikang Li Mingsheng Yang Yunfei Cai Yuanyuan Zhang Qingshuai Feng Jiantao Liu Tong Liu Key Laboratory of Aerospace Materials and Performance(Ministry of Education)School of Materials Science and Engineering Beihang UniversityBeijing 100191China Central Iron and Steel Research Institute Beijing 100081China

The microstructure and microsegregation of atomized powder,which depend on their sizes,are of great importance to the mechanical properties of the consolidated bulk ***,it is necessary to reveal the relationship between particle size and powder *** effects of particle size on the so-lidification characterization of the atomized Ni-based superalloy powders were studied via finite element *** on the simulations,a model was developed to predict the microsegregation and mi-crostructure of atomized powders with different sizes and study the influence of thermal history on the powder attributes during the atomization *** radiation heat transfer and temperature gradi-ent within the rapid solidification alloy powders were taken into account in this *** validating the accuracy of the model,the predictions of the present model were compared with the microsegregation and microstructure of the specific size powder close to the screen mesh *** results showed that mi-crostructure depended primarily on the temperature gradient within the powder,while the solidification rate had a more significant effect on the *** model predicted microstructure features in agreement with the experiment,and for microsegregation,the deviations of prediction for most ele-ments were less than 10%.This work provides a new model to precisely predict the microsegregation and microstructure of the atomized alloy powders and sets a foundation to control the powder features for various engineering applications.

关键词： Particle size Solidification microstructure Microsegregation Numerical simulation

Cu/Mo2C synthesized through Anderson-type polyoxometalates modulate interfacial water structure to achieve hydrogen evolution at high current density

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Nano Research 2024年第4期17卷 2546-2554页

作者： Dunyuan Jin Fen Qiao Yan Zhou Junfeng Wang Kecheng Cao Jing Yang jikang Zhao Lei Zhou Haitao Li School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China School of Physical Science and Technology and Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China Institute for Energy Research Jiangsu UniversityZhenjiang 212013China

The development of efficient non-precious metal catalysts is important for the large-scale application of alkaline hydrogen evolution reaction(HER).Here,we synthesized a composite catalyst of Cu and Mo_(2)C(Cu/Mo_(2)C)using Anderson-type polyoxometalates(POMs)synthesized by the facile soaking method as *** electronic interaction between Cu and Mo_(2)C drives the positive charge of Cu,alleviating the strong adsorption of hydrogen at the Mo site by modulating the d-band center of Mo_(2)*** studying the interfacial water structure using in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS),we determined that the positively charged Cu crystals have the function of activating water molecules and optimizing the interfacial water *** interfacial water of Cu/Mo_(2)C contains a large amount of free water,which could facilitate the transport of reaction *** to activated water molecules and optimized interfacial water structure and hydrogen adsorption energy,the overpotential of Cu/Mo_(2)C is 24 mV at a current density of 10 mA·cm^(-2) and 178 mV at a current density of 1000 mA·cm^(-2).This work improves catalyst performance in terms of interfacial water structure optimization and deepens the understanding of water-mediated catalysis.

关键词： electrocatalytic hydrogen production interfacial water charge transport d band center in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)

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“第二个结合”形成的历史逻辑

马克思主义与现实 2024年第1期 19-25,204页

作者：冯继康山东师范大学

“第二个结合”的提出经过了一个长期的、连续的过程。近代以来,民族危机深重,一些进步知识分子逐渐从被动接受西方文化转变为主动向西方文化学习,并在这一过程中坚持中华文化主体性。中国早期马克思主义者对代表旧制度和旧文明的传统... 详细信息

“第二个结合”的提出经过了一个长期的、连续的过程。近代以来,民族危机深重,一些进步知识分子逐渐从被动接受西方文化转变为主动向西方文化学习,并在这一过程中坚持中华文化主体性。中国早期马克思主义者对代表旧制度和旧文明的传统文化基本持批判态度,毛泽东则主张将中华民族历史遗产和传统文化中的优秀元素化用到自己的思想和理论体系中,为我们党正确对待中华传统文化提供了基本遵循。改革开放以来,中国共产党人逐步认识到,中华民族的优秀传统文化在马克思主义中国化和社会主义现代化建设中发挥着重要作用,因此提倡继承和弘扬中华优秀传统文化。中国特色社会主义进入新时代,习近平高度重视文化建设,把文化自信和道路自信、理论自信、制度自信并列为中国特色社会主义的“四个自信”,推进我国文化建设在正本清源、守正创新中取得历史性成就,最终提出“第二个结合”的理论。

关键词： “第二个结合” 中华优秀传统文化文化自信守正创新

辩证逻辑下跳出历史周期率“两个答案”的内在机理及协同路径

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理论学刊 2024年第4期 41-48页

作者：冯继康刘晓彤山东师范大学山东济南250358 山东师范大学马克思主义学院山东济南250358

“民主新路”和“自我革命”是中国共产党在百余年奋斗历程中探索出的跳出历史周期率的“两个答案”,二者相辅相成、相互促进,蕴含着系统科学的辩证思维。新征程上,在中国共产党长期执政的历史条件下考察“两个答案”的内在机理及协同路... 详细信息

“民主新路”和“自我革命”是中国共产党在百余年奋斗历程中探索出的跳出历史周期率的“两个答案”,二者相辅相成、相互促进,蕴含着系统科学的辩证思维。新征程上,在中国共产党长期执政的历史条件下考察“两个答案”的内在机理及协同路径,就要从辩证逻辑出发,从“内”与“外”的协同、“守”与“变”的平衡、“上”与“下”的互动中探寻答案。

关键词：中国共产党历史周期率民主新路自我革命

Synthesis of two A-B-C type conjugated amphiphilic triblock fullerene derivatives and their application in organic solar cells

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Chinese Chemical Letters 2020年第1期31卷 119-124页

作者： jikang Liu Pengfei Jiang Yao Wang Guoli tu Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

Two A-B-C type conjugated amphiphilic triblock fullerene derivatives C60-2 HMTPB and C60-2 EHTPB were obtained in multi steps synthesis with three different blocks,and the amphiphilic diblock molecular C60-4 TPB was also preferred as a *** as modifying layer on zinc oxide(ZnO),the three fullerene derivatives can all reduce the work function of ZnO via modulation of the interfacial dipoles and lead a better electrical *** introducing treatment of toluene,the obvious self-assembly of fullerene derivatives were observed,which were supported by X-ray diffraction and contact angle of water *** on PTB7-Th:PC71 BM system,the inverted organic solar cells devices with structure of ITO/ZnO/fullerene derivatives/PTB7-Th:PC71BM/Mo03/Al got power conversion efficiencies of 8.62%,8.83%and 9.00%for C60-4 TPB,C60-2 HMTPB and C60-2 EHTPB,respectively,compared 8.13%of devices with bare *** result of conjugated amphiphilic triblock fullerene derivatives provides a straightforward approaching by simultaneously modulating the morphology and interfacial work function of ZnO,which can also lead high performance in optoelectronic devices.

关键词： Amphiphilic triblock fullerene derivatives Interfacial dipoles Interface compatibility Self-assembly Water contact angle

“三位一体”综合合作组织嵌入乡村共同体的路径研究——经棚镇农业发展联合会的案例分析

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齐鲁学刊 2024年第2期 107-119页

作者：冯继康王骥山东师范大学经济学院山东济南250358

在经济利益导向下,农村合作经济组织日益脱嵌于以社会关系相连、惠农政策相关、文化观念共享为基础的乡村共同体,从而造成“精英俘获”“隐蔽雇佣”与“农村资金外流”等现象。克什克腾旗经棚镇农业发展合作联合会自2018年开展的农民“... 详细信息

在经济利益导向下,农村合作经济组织日益脱嵌于以社会关系相连、惠农政策相关、文化观念共享为基础的乡村共同体,从而造成“精英俘获”“隐蔽雇佣”与“农村资金外流”等现象。克什克腾旗经棚镇农业发展合作联合会自2018年开展的农民“生产、供销、信用”“三位一体”综合合作通过发展联结村民的网格化管理体系嵌入社会关系,通过构建打通行政层级与部门的联合党委嵌入惠农政策,通过坚持“姓农、为农、务农”的公益性嵌入文化观念。“生产、供销、信用”综合合作形成的无限次重复博弈与按交易额返利形成的激励相容是实现嵌入的主要动力机制。须从“三位一体”综合合作体系构建、自下而上网格化管理体系建设、惠农政策的下沉、加强“一懂两爱”教育等方面推动“三位一体”综合合作组织嵌入乡村共同体。

关键词： “三位一体”综合合作乡村共同体嵌入理论重复博弈激励相容

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扬州早茶文化的形成与价值

美食研究 2024年第3期41卷 11-16页

作者：仇雨景朱季康南京工业大学经济与管理学院江苏南京211816 扬州大学淮扬文化研究中心江苏扬州225002

扬州早茶文化在扬州地域美食文化的推动下,逐渐形成并发扬和传承,其历史悠久,内涵丰富。作为扬州饮食文化的重要组成部分,其形成机理深植于社会经济的发展、地域文化的融合以及市场需求的推动之中。扬州早茶文化的历史价值主要体现在传... 详细信息

扬州早茶文化在扬州地域美食文化的推动下,逐渐形成并发扬和传承,其历史悠久,内涵丰富。作为扬州饮食文化的重要组成部分,其形成机理深植于社会经济的发展、地域文化的融合以及市场需求的推动之中。扬州早茶文化的历史价值主要体现在传承历史文化、反映社会变迁、丰富人民生活三个方面,是弘扬中华优秀传统文化的生动载体,是见证城市发展与时代进步的独特视角,也是提升人民生活品质与精神追求的重要途径。它不仅是一种独特的饮食文化现象,更是扬州人民生活方式和价值观的体现。

关键词：饮食文化扬州早茶地域文化

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2023年12月大气环流和天气分析

气象 2024年第3期50卷 387-392页

作者：徐冉桂海林尤媛王继康国家气象中心北京100081

2023年12月大气环流的主要特征是:北半球极涡呈多极型分布,欧亚中高纬环流经向度大,东亚大槽偏强,西太平洋副热带高压异常强盛。12月,全国平均降水量为12.2 mm,较常年同期(11.9 mm)偏多2.5%;全国平均气温为-2.6℃,比常年同期(-3.0℃)偏... 详细信息

2023年12月大气环流的主要特征是:北半球极涡呈多极型分布,欧亚中高纬环流经向度大,东亚大槽偏强,西太平洋副热带高压异常强盛。12月,全国平均降水量为12.2 mm,较常年同期(11.9 mm)偏多2.5%;全国平均气温为-2.6℃,比常年同期(-3.0℃)偏高0.4℃。月内共出现6次冷空气过程、1次沙尘天气过程和1次大范围持续性雾-霾天气过程。其中13—16日,我国大部地区遭遇的强寒潮过程具有影响范围广、降温幅度大和低温极端性显著等特点。

关键词：大气环流冷空气沙尘雾-霾