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Frontiers of Engineering Management 2024年第3期11卷 576-583页

作者： Ting YAO Zhen-Ying LI yue-jun zhang School of Economics and Trade Hunan University of Technology and BusinessChangsha 410205China Center for Resource and Environmental Management Hunan UniversityChangsha 410082China Business School Hunan UniversityChangsha 410082China

This paper examines sustainable supply strategies for essential and strategic resources in China,addressing both domestic requirements and global supply *** the context of intense global competition for resources and substantial internal demand,China’s significant role as a major consumer and global supplier is pivotal in the dynamics of the global supply *** study highlights China’s dependence on imports for essential resources and the critical need for resilient supply chains to enhance national security and promote environmental *** referencing international experiences and accounting for China’s specific circumstances,this study proposes strategic initiatives,including updating the strategic resource catalog,imposing export controls on key minerals,promoting resource conservation,and enhancing global *** strategies aim to reduce external dependencies and support global resource *** proposed framework can help policymakers ensure long-term resource security and manage resources more effectively in complex global landscapes.

关键词： resources sustainable supply supply chain security stability

Surface modification of ammonium nitrate by coating with surfactant materials to reduce hygroscopicity

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Defence Technology（防务技术） 2019年第4期15卷 615-620页

作者： Baha I. Elzaki yue jun zhang School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 Jiangsu China Department of Chemical Engineering College of Engineering Karary University Omdurman 12304 Sudan

Ammonium nitrate(AN)is promising oxidizer in green *** this work,the physical coating method was improved to modify the surface of ammonium nitrate particles with different surfactant materials to reduce ***,stearic acid,stearyl alcohol,palmic acid,lauric acid,stearsmide,tetradecylamine,dodecylamine,and tetradecanol were used as coating surfactant *** hygroscopicity was tested for ammonium nitrate with and without *** transform infrared(FTIR)and scanning electron microscopy(SEM)were used to characterize the surface of coated and uncoated ammonium *** mass ratio of coating layer and decline of absorption rate of ammonium nitrate coated by cetylalcohol were 1.00%,and 28.40%,*** results indicate that coating with cetylalcohol surfactant have advantages over the other surfactants in term of low mass ratio of coating layer,and high decline of moisture absorption ***,cetylalcohol would be a promising coating surfactant material for ammonium *** idea and approach presented in this study have potential to made hydrophobic layer on the surface of particles to reduce hygroscopicity of AN,and also help the researcher to improving anti-hygroscopicity of ammonium salts.

关键词： Ammonium nitrate(AN) Coating Hygroscopicity Modification surface Surfactant

A new hybrid method with data‑characteristic‑driven analysis for artificial intelligence and robotics index return forecasting

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Financial Innovation 2023年第1期9卷 2019-2041页

作者： yue‑jun zhang Han zhang Rangan Gupta Business School Hunan UniversityChangsha 410082China Center for Resource and Environmental Management Hunan UniversityChangsha 410082China Department of Economics University of PretoriaPrivate Bag X20Hatfield 0028South Africa

Forecasting returns for the Artificial Intelligence and Robotics Index is of great significance for financial market stability,and the development of the artificial intelligence *** provide investors with a more reliable reference in terms of artificial intelligence index investment,this paper selects the NASDAQ CTA Artificial Intelligence and Robotics(AIRO)Index as the research target,and proposes innovative hybrid methods to forecast returns by considering its multiple structural ***,this paper uses the ensemble empirical mode decomposition(EEMD)method and the modified iterative cumulative sum of squares(ICSS)algorithm to decompose the index returns and identify the structural ***,it combines the least-square support vector machine approach with the particle swarm optimization method(PSO-LSSVM)and the generalized autoregressive conditional heteroskedasticity(GARCH)type models to construct innovative hybrid forecasting *** the one hand,the empirical results indicate that the AIRO index returns have complex structural characteristics,and present time-varying and nonlinear characteristics with high complexity and mutability;on the other hand,the newly proposed hybrid forecasting method(i.e.,the EEMD-PSO-LSSVM-ICSS-GARCH models)which considers these complex structural characteristics,can yield the optimal forecasting performance for the AIRO index returns.

关键词： Artificial Intelligence and Robotics index return forecasting PSO-LSSVM model GARCH model Decomposition and integration model Combination model

Refined analysis and prediction of natural gas consumption in China

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Journal of Management Science and Engineering 2019年第2期4卷 91-104页

作者： Ting Liang Jian Chai yue-jun zhang Zhe George zhang Business School Hunan UniversityChangsha410082China School of Economics&Management Xidian UniversityXi'an710126China College of Business&Economics Western Washington UniversityBellingham98225USA

In view of the abrupt and phased features of natural gas consumption,this paper attempts to predict natural gas consumption in China with a refined forecasting ***,we establish a Markov switching(MS)model to identify the phase characteristics after eliminating change points in the natural gas consumption sequence,using the product partition model(PPM).The results show that there are"rapid growth"and"slow growth"regimes in the development process of natural gas consumption in ***,the Bayesian model average(BMA)method is employed to determine the core determinants of natural gas consumption under sub-regimes,and it is determined that there are significant differences in the influencing factors under different regimes and ***,this paper establishes the BMA model of the"rapid growth"regime after predicting the state of future natural gas consumption in *** find that,compared to some other models,the BMA model that fully recognizes the regime without considering change points has the best predictive ***,the results of static and dynamic scenario analyses show that natural gas consumption continues to rise in 2019 and has obvious seasonal charac-teristics,while possible ultra-rapid growth of consumption in the future provides a new requirement for the supply of natural gas.

关键词： Natural gas consumption PPM model Markov switching model BMA model Scenario analysis

Survey on performance of vertical slot and nature-like fishways at Angu hydropower station, Southwest China

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Water Science and Engineering 2024年第1期17卷 83-91页

作者： jun-jian Sun Jia-yue Shi Qi zhang Xiao-tao Shi jun-jun Tan PowerChina Huadong Engineering Corporation Limited Hangzhou 311122China Hubei International Science and Technology Cooperation Base of Fish Passage China Three Gorges UniversityYichang 443002China

To restore dam-blocked natural fish migratory passages,a growing number of artificial fishways have been built in water conservancy and hydropower projects in *** Angu hydropower station involved diverse important fish habitats in the lower reaches of the Daduhe River in Southwest ***,a vertical slot fishway(VSF)and a nature-like fishway(NLF)were built near the backwater area of the reservoir to connect the upstream and downstream *** and aquatic ecological surveys were conducted after the completion of the project to estimate the fish passing effect of the two *** results indicated that both fishways were in effective operation and could maintain the desired hydrodynamic conditions and be used by several local fish *** the survey,149 fish from 15 species and 111 fish from 17 species were captured by the traps in the VSF and NLF,respectively,while 1263 fish from 27 species were found in the downstream *** species captured in the VSF were not found in the NLF,and vice versa,which implied the different preferences of ***,3789 signals including 2099 upward ones and 1690 downward ones were monitored with an ultrasonic fish detector at the inlet of the *** findings revealed the characteristics of fish species observed in and near the fishways and provided valuable insights into the different fish passing capabilities of VSFandNLF.

关键词： Vertical slot fishway Nature-like fishway Aguatic ecological survey Fishwaymonitoring Statistical analysis

Aggregation of CeAlO_(3) inclusions in heavy ingot of a steel containing 0.007% aluminum

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Journal of Iron and Steel Research International 2024年第8期31卷 1960-1972页

作者： Qiu-yue Zhou jun-tao Ba Lun zhang Wei Chen Ying Ren Li-feng zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The distribution of inclusions at the bottom of a Ce-treated heavy steel ingot was detected and *** three-dimensional morphology and spatial distribution of CeAlOs clusters were characterized using the electrolytic extraction and Micro-CT detection.A model of inclusion collision to predict the aggregation of CeAlO_(3) inclusions in the ingot was established and validated by measured *** were mainly CeAlO_(3) and a small amount of Ce_(2)O_(2)S in the tundish after cerium *** collision and aggregation of inclusions led to the formation of large clusters in the ingot during the solidification *** slag entrainment inclusions,large CeAO_(3) clusters and small CeAlO_(3) particles were observed from the center to the edge of the ingot *** inclusions were mainly concentrated at the *** number density of inclusions larger than 200μm was 0.21 mm^(-3).The maximum diameter of CeA1O_(3) clusters was 1340μ*** the edge to the radial center and from the bottom to the top,the average diameter of inclusions gradually increased due to the longer solidification time of the ingot.

关键词： Inclusion Heavy ingot Cerium treatment Collision

Dietary fat and carbohydrate-balancing the lactation performance and methane emissions in the dairy cow industry: A meta-analysis

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Animal Nutrition 2024年第2期17卷 347-357页

作者： Chenguang zhang Xingwei Jiang Shengru Wu jun zhang yue Wang Zongjun Li junhu Yao College of Animal Science and Technology Northwest A&F University

For the agroecosystems of the dairy cow industry, dietary carbohydrate（starch, neutral detergent fiber[NDF]） and fat could directly affect rumen methane emissions and host energy utilization. However, the relationships among diet, lactation performance, and methane emissions need to be further determined to assist dairy farms to adjust diet formulations and feeding strategies for environmental and production management. A meta-analysis was conducted in the current study to explore quantitative patterns of dietary fat and carbohydrate at different levels in balancing lactation performance and environment sustainability of dairy cows, and to establish a methane emission prediction model using the artificial neural network（ANN）model. The results showed that the regression relationship between dietary fat, carbohydrate and methane emissions could be shown by the following models: methane = 106.78 +（14.86 × DMI）, R2= 0.80;methane = 443.17-（46.41 × starch/NDF）, R2= 0.76; and methane = 388.91 +（31.40 × fat）-（5.42 × fat2）,R2= 0.80. The regression relationships between dietary fat, carbohydrate and lactation performance could be shown by the following models: milk fat yield = 1.08 +（0.43 × starch/NDF）-[0.34 ×（starch/NDF）2],R2= 0.79; milk protein yield = 0.68 +（0.15 × fat）-（0.016 × fat2）, R2= 0.82. In the structural equation model, we found that when formulating dietary carbohydrates and fats, it was necessary to balance the relationship between methane emissions and lactation performance. Specifically, dietary starch/NDF was lower than 0.63（extremum point） and dietary fat was between 2.89% and 4.69%（extremum point）, it could ensure that the aim of methane emission reduction（methane emissions decrease with increasing dietary starch/NDF and fat） was achieved without losing lactation performance of dairy cows（lactation performance increase with increasing dietary starch/NDF and fat）. Finally, we established the ANN model to predict methane emissions（training set: R2= 0.62; vali

关键词： Dietary fat and carbohydrate Environment sustainability Lactation performance Dairy cow Meta-analysis

Overview of research on carbon information disclosure

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Frontiers of Engineering Management 2020年第1期7卷 47-62页

作者： yue-jun zhang Jing-yue LIU Business School Center for Resource and Environmental ManagementHunan UniversityChangsha 410082China

Against the background of addressing global climate change and carbon emission reduction,corporate carbon information disclosure(CID)has become an important measure to achieve carbon emission reduction worldwide and a research hotspot closely investigated by the *** study provides a systematic overview of literature on CID,including its research trend,theoretical basis,disclosing features,influencing factors,and *** indicate that,first,CID has been increasing in recent years,but the content and quality of the disclosure still need to be ***,the main influencing factors of CID include company features,corporate governance,environmental performance,institutional characteristics,and ***,the consequences of CID are based mainly on company performance,ecological environment,and investors’***,most studies have confirmed the positive effect of CID on company performance and investors’decision-making,but the nexus of environmental performance and corporate CID remains to be *** important future research directions are also proposed based on these results.

关键词： climate change carbon emissions reduction carbon information disclosure green development

Hydrogel bioadhesives harnessing nanoscale phase separation for Achilles tendon repairing

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Nano Research 2024年第2期17卷 778-787页

作者： jun zhang Xingmei Chen Jingseng Lin Pei zhang Iek Man Lei yue Tao Jiajun zhang Tian Luo Ji Liu Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Research and Innovation Center SKG Health TechnologyShenzhen 518000China SAFE(Shenzhen)Medical Technology Company Limited Shenzhen 518000China Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and TechnologyShenzhen 518055China

Repairing Achilles tendon has emerged as a long-standing challenge in the orthopaedic *** suture is the gold standard for re-attaching and repairing the fractured Achilles tendons in clinical surgeries,it is still subjected to numerous adverse side-effects,including chronic inflammatory,tendon tissue re-rupture,scar formation,and post-surgical peritendinous *** this work,we develop a class of hydrogel bioadhesives with tailored nanoscale phase separation for Achilles tendon *** address the existing limitations of sutures,our hydrogel bioadhesives encompass three core functionalities:(i)instant and tough adhesion to Achilles tendon tissues,(ii)extraordinary long-term adhesion robustness under wet and dynamic in vivo conditions,and(iii)anti-postsurgical peritendinous *** our hydrogel bioadhesives with sutures,such kind of integrated approach enables a conformable yet robust biointerface with the tendon tissues,and prevents the fibroblast migration and formation of connective tissues,thus facilitating the tendon *** hydrogel bioadhesives reported here open up new opportunities for the repairing of fractured Achilles tendons in diverse and complicated clinical scenarios.

关键词： hydrogels phase separation bioadhesion robustness tendon repairing

Highly Red Emissive Conjugated Homopolymers Based on Double B←N Bridged Bipyridine Unit

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Chinese Journal of Polymer Science 2024年第8期42卷 1029-1037页

作者： Yu-yue Gao Kai-Yuan zhang Shu-Meng Wang Hui Tong jun Liu State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Conjugated homopolymers based on six-member rings,e.g.,polyfluorene,always exhibit blue emission and conjugated homopolymers based on five-member rings,e.g.,polythiophene,can give red emission with low *** this work,we report a series of new conjugated homopolymers based on six-member rings with high-efficiency deep-red *** repeating units of the red light emitting homopolymers are double B←N bridged bipyridine(BNBP)with the boron atoms functionalized with diphenyl,borafluorene,and 2,7-di-tert-butyl-borafluorene groups,*** relationship between the chemical structures and the opto-electronic properties of the monomers and the homopolymers has been systematically *** three polymers emit pure red light(λ_(max)=656 nm)or deep red light(λ_(max)=693 nm)with fluorescence quantum efficiency in solution higher than 60%.The polymers can be used as the emitters in solution-processed organic light-emitting diodes with red emission and decent device *** work indicates a new strategy to design highly efficient light emitting conjugated polymers.

关键词： Conjugated homopolymers Double B←N bridged bipyridine(BNBP) Deep-red emission High fluorescent efficiency