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企业战略转型中的资源编排与价值创造——以路德环境为例

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财务管理研究 2024年第8期 43-50页

作者：程艳铧鲁银梭浙江农林大学杭州311130

随着我国对环境保护要求的不断提高,加快推进绿色战略转型成为我国环保企业进行可持续发展的必然选择。以路德环境战略转型为例,利用资源编排理论对企业战略转型及价值创造进行了分析。研究发现,路德环境整合商标、资金、技术、原料等资... 详细信息

随着我国对环境保护要求的不断提高,加快推进绿色战略转型成为我国环保企业进行可持续发展的必然选择。以路德环境战略转型为例,利用资源编排理论对企业战略转型及价值创造进行了分析。研究发现,路德环境整合商标、资金、技术、原料等资源,通过资源构建、资源捆绑、资源利用,培育了企业业务处理能力,形成稳定业务模式,同时生成多向合作能力与新型饲料循环供应链,创造新型核心优势,提升公司治理能力、降低经营风险。

关键词：战略转型资源编排理论价值创造

Numerical analysis of turbulent mixed convection air flow in inclined plane channel with k-εtype turbulence model

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Nuclear Science and Techniques 2008年第2期19卷 121-128页

作者： XIE Zhengrui YANG yanhua GU Hanyang cheng Xu School of Nuclear Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

Numerical study on turbulent mixed convection in inclined plane channels,from 15° to 90° (vertical),was carried out to examine the effect of inclination on fluid flow and heat transfer *** turbulent air flows upward or downward into the duct with one wall heated from *** results with several kinds of k-εtype turbulence models were used to compare the experimental data with those in literatures to determine suitable *** dependents of Nusselt number on the inclination angle of both the buoyancy-aided and buoyancy-opposed flow are discussed.

关键词：混合对流 k-ε模型湍流模型主测线渠道

Fibrous Aerogels with Tunable Superwettability for High-Performance Solar-Driven Interfacial Evaporation

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Nano-Micro Letters 2023年第5期15卷 51-68页

作者： chengjian Xu Mengyue Gao Xiaoxiao Yu Junyan Zhang yanhua cheng Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China

Solar-driven interfacial evaporation is an emerging technology for water ***,double-layered structure with separate surface wettability properties is usually employed for evaporator ***,creating materials with tunable properties is a great challenge because the wettability of existing materials is usually ***,we report vinyltrimethoxysilane as a single molecular unit to hybrid with bacterial cellulose(BC)fibrous network,which can be built into robust aerogel with entirely distinct wettability through controlling assembly *** groups or carbon atoms are exposed on the surface of BC nanofibers,resulting in either superhydrophilic or superhydrophobic *** this special property,single component-modified aerogels could be integrated into a double-layered evaporator for water *** 1 sun,our evaporator achieves high water evaporation rates of 1.91 and 4.20 kg m^(-2)h^(-1)under laboratory and outdoor solar conditions,***,this aerogel evaporator shows unprecedented lightweight,structural robustness,long-term stability under extreme conditions,and excellent salt-resistance,highlighting the advantages in synthesis of aerogel materials from the single molecular unit.

关键词： Cellulose aerogel Tunable wettability Thermal insulation Robust interface Solar vapor generation

Molecular Motions in Polymer Matrix for Microenvironment Sensing

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Chemical Research in Chinese Universities 2021年第1期37卷 90-99页

作者： GAO Mengyue cheng yanhua ZHANG Junyan XU chengjian YU Xiaoxiao ZHU Meifang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620P.R.China

Polymer science entails the structural study at multi-levels from nano-to micro-and mesoscale,which is highly important to transfer or even amplify the molecular information to macroscopic *** polymer structural transitions from lower-order to higher-order superstructures are normally involved to achieve selective,efficient and sophisticated ***,in-situ visualization of these processes is highly important,not only for fundamental understanding the structural evolution,but also for the optimization of the process flow during the materials *** imaging based on aggregation-induced emission(AIE)provides an ideal tool that offers a simple,accurate,and easy-readable method to fulfill the above *** to the twisted propeller-like structure of AIE luminogens(AIEgens),they show high fluorescence sensitivity to the surrounding microenvironment(e.g.,viscosity,rigidity,and polarity)through intramolecular *** this short review,we summarize the recent applications of AIEgens to serve as“built-in”sensors to analyze the process of polymerization,microphase separation,glass/vitrification transition,polymer solvation,crystallization,*** perspective on the future application of AIE technology in polymer engineering,especially fiber materials,is also discussed.

关键词： Aggregation-induced emission(AIE) Intramolecular motion Polymer structure Polymer microenvironment Visualization

常压下SiC包壳材料表面饱和池式沸腾汽泡行为机理研究

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核动力工程 2024年第S01期45卷 167-174页

作者：金德升严亚伦程艳花付学峰彭振驯廖业宏毛玉龙中广核研究院有限公司广东深圳518000

SiC材料是一种耐高温、抗氧化性好的耐事故燃料(ATF)类型,其传热及临界热流密度(CHF)性能是评估材料性能的重要指标,汽泡行为机理研究有助于评估其传热性能。采用常压池式沸腾可视化实验装置对SiC包壳材料汽泡行为机理进行研究,分析了... 详细信息

SiC材料是一种耐高温、抗氧化性好的耐事故燃料(ATF)类型,其传热及临界热流密度(CHF)性能是评估材料性能的重要指标,汽泡行为机理研究有助于评估其传热性能。采用常压池式沸腾可视化实验装置对SiC包壳材料汽泡行为机理进行研究,分析了其池式沸腾曲线不同区段中汽泡生长、脱离过程。根据观察到的SiC包壳表面池式沸腾汽泡图像,将整个池式沸腾传热过程分为自然对流区段、孤立汽泡核态沸腾区段、弹状汽泡核态沸腾区段和膜状汽泡核态沸腾区段4个区段。在孤立汽泡核态沸腾区段,SiC包壳表面汽泡生长时间较短、汽泡脱离频率高;在弹状汽泡核态沸腾区段,SiC表面产生大量汽泡,汽泡之间的相互作用剧烈,SiC表面传热较强。建立的接触角与脱离直径关系式可为后续传热模型的建立提供重要支撑。

关键词： SiC 池式沸腾汽泡行为脱离直径脱离频率

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Polymer-based hybrid materials and their application in personal health

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Nano Research 2023年第3期16卷 3956-3975页

作者： Ran Cao yanhua cheng Ruili Wang Jin Wen Liping Zhu Weiqing Kong Xiaolan Qiao Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

With unprecedented properties and functions,polymer-based hybrid materials hold extremely important position in many *** in this review,we summarized applications of polymer-based hybrid materials toward personal ***,theoretical calculation and in-situ visualization used to explore the interfacial interaction and formation of hybrid materials are ***,applications of polymer-based hybrid materials in personal health from proactive protection(anti-bacteria and harmful gas removal),health condition monitoring(breathing and sleep)to disease diagnosis(magnetic resonance imaging),and tissue therapy(dental restoration)are ***,aggregation-induced emission(AIE)organic molecules based optical sensors for personal security and polymer semiconductor for organic thin film transistors are simply ***,we present the future tendency for preparing polymer-based hybrid materials that related with personal health.

关键词： hybrid materials protection monitoring biomedical function

Prediction of Online Judge Practice Passing Rate Based on Knowledge Tracing

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Journal of Donghua University(English Edition) 2021年第3期38卷 240-244页

作者： HUANG Yongfeng cheng yanhua College of Computer Science and Technology Donghua University Shanghai 201620 China

Programming ability has become one of the most practical basic skills,and it is also the foundation of software ***,in the daily training experiment,it is difficult for students to find suitable exercises from a large number of topics provided by numerous online judge(OJ)*** high passing rate topics with an effective prediction algorithm can effectively solve the *** applying some common prediction algorithms based on knowledge tracing could bring some problems,such as the lack of the relationship among programming exercises and dimension disaster of input *** this paper,those problems were analyzed,and a new prediction algorithm was *** information,which represented the relationship between exercises,was added in the input *** the input vector was also compressed to solve the problem of dimension *** experimental results show that deep knowledge tracing(DKT)with side information and compression(SC)model has an area under the curve(AUC)of 0.7761,which is better than other models based on knowledge tracing and runs faster.

关键词： individualized prediction knowledge tracing online judge(OJ) recommending deep learning

Review:Aggregation-Induced Emission——A New Tool to Study Polymer Thermodynamics and Kinetics

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Journal of Harbin Institute of Technology(New Series) 2022年第6期29卷 89-100页

作者： Yifan Ge Xiaoxiao Yu Junyan Zhang Lan Zhou yanhua cheng Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Polymer thermodynamics and kinetics are important components in the basic theory of polymer physics, which provide critical support for polymer processing and molding. As an important thermal analysis technology, differential scanning calorimetry(DSC) is a key way to explore the molecular motion of polymer chains, molecular structure, and condensed structure, greatly promoting the development of polymer materials. However, this technique is limited by its ambiguous results, because of inaccurate heat flow measurement and high parameter dependence. As an alternative strategy, aggregation-induced emission luminogens(AIEgens) have been extensively applied in various targets analysis and process monitoring, owing to their weak intermolecular interactions and highly twisted conformation. The optical properties of AIEgens are highly sensitive to the variations of the polymer microenvironment, including characteristic transition, crosslinking reaction, crystallization behavior, and phase separation. In this review, the progress of AIE technology in visualizing polymer molecular motion and structure evolution is summarized, compensating for the limitation of the traditional DSC method to facilitate further research in polymer science and engineering.

关键词： aggregation-induced emission thermodynamics kinetics polymer physics visualization

Visual Detection of COVID‑19 from Materials Aspect

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Advanced Fiber Materials 2022年第6期4卷 1304-1333页

作者： Gang Wang Le Wang Zheyi Meng Xiaolong Su Chao Jia Xiaolan Qiao Shaowu Pan Yinjun Chen yanhua cheng Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

In the recent COVID-19 pandemic,World Health Organization emphasized that early detection is an effective strategy to reduce the spread of SARS-CoV-2 *** diagnostic methods,such as reverse transcription-polymerase chain reaction(RT-PCR)and lateral flow immunoassay(LFIA),have been applied based on the mechanism of specific recognition and binding of the probes to viruses or viral *** the remarkable progress,these methods still suffer from inadequate cellular materials or errors in the detection and sampling procedure of nasopharyngeal/oropharyngeal swab ***,developing accurate,ultrafast,and visualized detection calls for more advanced materials and technology urgently to fight against the *** this review,we first summarize the current methodologies for SARS-CoV-2 ***,recent representative examples are introduced based on various output signals(e.g.,colorimetric,fluorometric,electronic,acoustic).Finally,we discuss the limitations of the methods and provide our perspectives on priorities for future test development.

关键词： COVID-19 Virus diagnosis Rapid and high-throughput detection Visual detection Materials aspects