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Mechanisms and reusability potentials of zirconium-polyaziridine-engineered tiger nut residue towards anionic pollutants

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Chinese Journal of Chemical Engineering 2023年第8期60卷 275-292页

作者： Alexander nti Kani Evans Dovi Aaron Albert Aryee Runping Han Zhaohui Li Lingbo Qu College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China

Access to fresh water,its availability,and its quality are a global challenge to humanity,largely due to human activities in the ***,global water security has been jeopardized,requiring urgent remediation to safeguard our very ***,a novel and facilely engineered zirconium and polyethylenimine adsorbent based on tiger nut residue (TNR) was prepared,and its adsorptive capabilities towards a model dyestuff and nutrient were invested through a batch adsorption *** developed adsorbent,zirconium-polyethylenimine-engineered tiger nut residue (TNR@PEI–Zr) was characterised by scanning electron microscopy,Fourier-transform infrared spectroscopy,X-ray diffraction analysis,and X-ray photoelectron spectroscopy to understand its morphology and surface chemistry and predict its adsorption ***@PEI–Zr had a p H point of zero charge (pH_(zpc)) of *** introduction of salts inhibited the removal efficiency of Alizarin red (AR) and phosphate (PO_(4)^(3–)) in the order of HCO_(3)^(-)>SO_(4)^(2–)>Cl^(-).Increasing temperatures (293–313 K) favoured the adsorption process at pH *** Langmuir model suited the adsorption processes of both AR and PO_(4)^(3–),implying homogenous and monolayer removal of pollutants with a maximal capacity of 537.8 mg·g^(-1)and 100.5 mg·g^(-1)at a dose of 0.01 g,*** rate-determining steps of AR and PO_(4)^(3–)followed a pseudo-secondorder kinetic model and were thermodynamically spontaneous with an increase in randomness at the solid-solution *** adsorbent’s recyclability was notable and outperformed most adsorbents in terms of removal ***@PEI–Zr was found to be stable,and its use in practical wastewater decontamination was effective,ecologically acceptable and free of secondary pollution problems.

关键词： Adsorption Modified tiger nut residue Alizarin red Phosphate Leaching Regeneration

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A Mini-Review of Machine Learning in Big Data Analytics:Applications,Challenges,and Prospects

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Big Data Mining and Analytics 2022年第2期5卷 81-97页

作者： Isaac Kofi nti Juanita Ahia Quarcoo Justice Aning Godfred Kusi Fosu the Department of Computer Science and Informatics University of Energy and Natural ResourcesSunyani BS2103Ghana the Department of Electrical&Electronic Engineering Sunyani Technical UniversitySunyani BS2103Ghana the Department of Computer Science Sunyani Technical UniversitySunyani BS2103Ghana

The availability of digital technology in the hands of every citizenry worldwide makes an available unprecedented massive amount of *** capability to process these gigantic amounts of data in real-time with Big Data Analytics(BDA)tools and Machine Learning(ML)algorithms carries many ***,the high number of free BDA tools,platforms,and data mining tools makes it challenging to select the appropriate one for the right *** paper presents a comprehensive mini-literature review of ML in BDA,using a keyword search;a total of 1512 published articles was *** articles were screened to 140 based on the study proposed novel *** study outcome shows that deep neural networks(15%),support vector machines(15%),artificial neural networks(14%),decision trees(12%),and ensemble learning techniques(11%)are widely applied in *** related applications fields,challenges,and most importantly the openings for future research,are detailed.

关键词： Big Data Analytics(BDA) Machine Learning(ML) Big Data(BD) Hadoop MapReduce

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Seamount chains and hotspot tracks:Superficially similar,deeply different

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Geoscience Frontiers 2023年第6期14卷 307-326页

作者： Edgardo cañón-Tapia División de Ciencias de la Tierra CICESE.Carretera Ensenada-Tijuana#3985Ensenada Baja CaliforniaCP 22860Mexico

Nearly 80%of the seafloor extension has not been covered by high-resolution bathymetry,impeding direct observation of ***,lists of seamount location and height at a global scale have been produced using different *** this work four of such databases(publicly available)are compared with each other to assess their *** identify large differences among databases that could have exerted strong influences on models of seamount production and associated geodynamic *** those differences,it is shown that all databases allow the identification of seamount lines both along the present-day Mid Ocean Ridge(MOR)system and on intraplate ***,those seamount lines do not coincide with the so-called hotspot tracks that commonly were defined by selectively focusing attention on the larger *** of all the databases also shows that distinction based only on seamount size between seamounts produced at Mid-Ocean Ridge(MOR)environments from those associated with mantle-plum fed-hotspot activity has been ***,combined with the fact that most seamount lines defined by the available databases can be traced back to past locations of MOR indicates that most of the present-day intraplate linear arrays of seamounts,which include some large seamounts,were not produced by the action of underlying mantle anomalies envisaged in the form of mantle *** evidence presented here calls for a reassessment of the form in which volcanic and tectonic activities are conceptually related to each other.

关键词： Seamount origin Chains of seamounts Spatial distribution of volcanism Intraplate volcanism Mid Ocean Ridge volcanism

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企业家在农村公共产品供给中的作用：连云港案例研究

企业家在农村公共产品供给中的作用：连云港案例研究

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作者： Maxwell nti 江苏大学

学位级别：硕士

包括中国在内,世界上大多数国家的农村,其经济贫困状态令人震惊和唏嘘。农村地区存在一些特有问题,如:收入低、生产力低、失业率高、人口率高、技术落后、基础设施不足、文盲率高、营养不良等。本研究旨在探索中国农民创业者对农村公共... 详细信息

包括中国在内,世界上大多数国家的农村,其经济贫困状态令人震惊和唏嘘。农村地区存在一些特有问题,如:收入低、生产力低、失业率高、人口率高、技术落后、基础设施不足、文盲率高、营养不良等。本研究旨在探索中国农民创业者对农村公共产品的供给情况。研究采用中国连云港地区235位农民创业者的样本数据,并通过SPSS和Smart PLS软件进行结构方程建模分析。本研究的创新之处在于提出了:公共产品的供给状况取决于农民创业者的效用、能力和行为意向,为进一步理解农民创业者做出了理论贡献。不同于其他研究单独看待或讨论这些因素,本研究将这三个因素视为在理解农民创业者供给公共产品方面的相互补充。农民创业者必须具备人力、财力、物力和其他方面的能力,才能成功地为村庄提供公共物品。农民创业者对村庄公共品供给的期望效用可以理解为农民创业者向农村社区提供公共品时所期望获得的心理满足程度。那些推动创业活动的公共产品往往更受农民创业者的青睐。因此,农民创业者会试图提供他们感兴趣或能通过这一行为获利的公共产品,在那些农民创业者无法及时得到慈善行为回报的地方,不论该地区对公共品的需求有多少,他们都可能会视而不见,不愿为那些村庄提供援助。计划行为理论揭示了农民创业者提供公共物品的行为意图。一个人可能强烈地渴望执行某种行为,但却缺乏必要的机会或资源。例如,有意提供公共产品的农民创业者必须具备一定的能力,如知识、技能、能力、信息、时间、金钱、设备和他人的合作等,才能真正实施理论上的各种行为。本文发现,农民创业者更愿意免费提供公共产品帮助消除农村贫困,为农村居民提供更好生活。农民创业者想要为农村发展作出贡献的部分原因可能与家乡情感、商业发展和名望有关。同时,本研究还显示农民创业者提供的部分物品包括公路、桥梁、学校、路灯、农田水利设施、农业技术服务、医疗用房和饮用水设施等。此外,关于农村公共物品供给对农村减贫的影响的研究结果表明,农村公共产品供给对农村减贫具有积极作用,公共产品供给为农村社区带来了以下好处;村民的思想越来越开放、休闲活动越来越丰富,更多的孩子得以接受教育,村民家庭收入得以增加,村里医疗设施的可用性增大,村民自主创业增多,村办企业资金实力日益增长等。此外,研究结果表明农民创业、资源、能力回报与声誉回报之间存在一种直接、正向关系,农民创业对资源和能力回报具有显著的正向影响(β=0.197,p<0.05);农民创业者对声誉回报有显著的正向影响(β=0.129,p<0.05);资源和能力回报与公共品供给呈显著正相关(β=0.184,p<0.05);声誉回报与公共品供给呈显著正相关(β=0.160,p<0.05);社会文化制度、家庭关系和公共品特性等其他因素被视为创业者在提供公共品方面发挥作用的调节作用。研究结论还表明,私营企业参与可以拓宽对弱势或特殊人群的救助方案,提供更安全的工作场所,促进非歧视性就业政策的实施,支持低信贷准入,促进低成本住房投资等。

关键词：农民创业创业者能力私营企业公共品供给连云港

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Adolescents’ Knowledge of Diet-Related Chronic Diseases and Dietary Practices in Ghana

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Food and Nutrition Sciences 2012年第11期3卷 1527-1532页

作者： Christina A. nti Augustina Brown Angelina Danquah Department of Family and Consumer Sciences School of Agriculture University of Ghana Legon Ghana.

Diet-related chronic diseases constitute public health and developmental challenges in Ghana. The Ghana Health Service in 2007 reported a national prevalence of diabetes of 11.6%, 27.8% for hypertension and 25% of women were reported to be overweight. Adolescents usually adopt lifestyles that negatively affect their nutritional and health status and increase their risk for development of diet-related chronic diseases later in life. The study was therefore carried out to investigate adolescents’ knowledge of diet-related chronic diseases and its influence on their dietary practices. The study design was a cross-sectional survey involving 313 adolescents aged 14 18 years from public and private senior high schools. Structured interviews and diet assessment methods were used to collect information on respondents’ knowledge of diet-related chronic diseases and dietary practices. The data collected were analyzed using the SPSS program version 16. The Chi-square test and ANOVA were used to determine the relationships between respondents’ knowledge of diet-related chronic diseases and dietary practices. The results revealed that knowledge of diabetes, hypertension and obesity were low among the respondents with most of them (89.2%) having fair to poor knowledge of the diseases. Eighty-eight percent of the adolescents ate three or more times in a day. Meals mostly skipped were breakfast and lunch. Dietary diversity of the respondents was generally poor. There was a significant relationship between knowledge of diet-related chronic diseases and the dietary practices of the adolescents. As knowledge of the diseases increased, dietary diversity also improved.

关键词： Adolescents Diet-Related Chronic Diseases Dietary Practices

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Comparative performance analysis of stroke correspondence search methods for stroke-order free online multi-stroke character recognition

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Frontiers of Computer Science 2014年第5期8卷 773-784页

作者： Wenjie ca1 Seiichi UCHIDA Hiroaki SAKOE Department of Advanced Information Technology Kyushu University Fukuoka-shi 819-0395 Japan

For stroke-order free online multi-stroke charac- ter recognition, stroke-to-stroke correspondence search be- tween an input pattern and a reference pattern plays an im- portant role to deal with the stroke-order variation. Although various methods of stroke correspondence have been pro- posed, no comparative study for clarifying the relative su- periority of those methods has been done before. In this pa- per, we firstly review the approaches for solving the stroke- order variation problem. Then, five representative methods of stroke correspondence proposed by different groups, includ- ing cube search （CS）, bipartite weighted matching （BWM）, individual correspondence decision （ICD）, stable marriage （SM）, and deviation-expansion model （DE）, are experimen- tally compared, mainly in regard of recognition accuracy and efficiency. The experimental results on an online Kanji char- acter dataset, showed that 99.17%, 99.17%, 96.37%, 98.54%, and 96.59% were attained by CS, BWM, ICD, SM, and DE, respectively as their recognition rates. Extensive discussions are made on their relative superiorities and practicalities.

关键词： cube search bipartite weighted matching indi-vidual correspondence decision stable marriage deviation-expansion model

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Analysis and Modeling of Slope Stability in the Three-Gorges Dam Reservoir (China)——The case of Huangtupo Landslide

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Journal of Mountain Science 2011年第2期8卷 166-175页

作者： R.COJEAN Y.J.ca Centre de Géosciences Mines-ParisTech Paris France Changjiang Institute of Survey Planning Design & Research CWRC Wuhan China

The water level in the Three Gorges Dam reservoir is expected to change between the elevations of 145 m and 175 m, as a function of the flood control implementation and the intensity of the annual flood. As a matter of fact, the hydraulical and mechanical loadings, related to the water level modifications, will result in alterations in the slope stability conditions. The town of Badong (Hubei), of 20 000 inhabitants, is one of the towns which was submerged by the impoundment of the reservoir. As a consequence, the new town of Badong was constructed on a nearby site which appeared to be partly an unstable site. A part of this site corresponds to an old landslide, the Huangtupo landslide, the base of which had to be submerged by the water of the reservoir. The analysis of the Huangtupo landslide, taking into account various events scenarios, drainage and reinforcement measures and monitoring devices, allows to illustrate the general process implemented all along the reservoir in order to mitigate the landslide hazard.

关键词： Three Gorges Dam Landslide Modelling

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Enhancement of endogenous midbrain neurogenesis by microneurotrophin BNN-20 after neural progenitor grafting in a mouse model of nigral degeneration

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Neural Regeneration Research 2024年第6期19卷 1318-1324页

作者： Theodora Mourtzi Nasia Antoniou Christina Dimitriou Panagiotis Gkaravelas Georgia Athanasopoulou Panagiota nti Kostantzo Olga Stathi Efthymia Theodorou Maria Anesti Rebecca Matsas Fevronia Angelatou Georgia Kouroupi Ilias Kazanis Laboratory of Developmental Biology Department of BiologyUniversity of PatrasPatrasGreece Laboratory of Cellular and Molecular Neurobiology-Stem Cells Hellenic Pasteur InstituteAthensGreece Department of Physiology School of MedicineUniversity of PatrasPatrasGreece

We have previously shown the neuroprotective and pro-neurogenic activity of microneurotrophin BNN-20 in the substantia nigra of the“weaver”mouse,a model of progressive nigrostriatal ***,we extended our investigation in two clinically-relevant ***,we assessed the effects of BNN-20 on human induced pluripotent stem cell-derived neural progenitor cells and neurons derived from healthy and parkinsonian ***,we assessed if BNN-20 can boost the outcome of mouse neural progenitor cell intranigral transplantations in weaver mice,at late stages of *** found that BNN-20 has limited direct effects on cultured human induced pluripotent stem cell-derived neural progenitor cells,marginally enhancing their differentiation towards neurons and partially reversing the pathological phenotype of dopaminergic neurons generated from parkinsonian *** agreement,we found no effects of BNN-20 on the mouse neural progenitor cells grafted in the substantia nigra of weaver ***,the graft strongly induced an endogenous neurogenic response throughout the midbrain,which was significantly enhanced by the administration of microneurotrophin *** results provide straightforward evidence of the existence of an endogenous midbrain neurogenic system that can be specifically strengthened by ***,the lack of major similar activity on cultured human induced pluripotent stem cell-derived neural progenitors and their progeny reveals the in vivo specificity of the aforementioned pro-neurogenic effect.

关键词： adult neurogenesis BNN-20 brain-derived neurotrophic factor cell replacement induced pluripotent stem cells(iPSCs) neurotrophic factors Parkinson's disease substantia

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Fine-scale analysis reveals a potential influence of forest management on the spatial genetic structure of Eremanthus erythropappus

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Journal of Forestry Research 2021年第4期32卷 1567-1578页

作者： Lucas Fernandes Rocha Natália Ribeiro de Paula Dulcinéia De carvalho Department of Forest Science Federal University of Lavras(UFLA)Av.Doutor Sylvio Menicucci1001 Aquental SolLavrasMinas Gerais State 37200-000Brazil Department of Forest Science College of Agricultural Sciences(FCA/UNESP)São Paulo State UniversityAv.Universitária3780Altos do ParaísoBotucatuSão Paulo State 18610-034Brazil

Forest management may have significant effects on forest connectivity and natural population *** old-growth single trees may also change natural patterns of genetic variation and spatial genetic *** study evaluated the impacts of forest management using a silvicultural system of seed trees on the genetic diversity and spatial genetic structure of Eremanthus erythropappus(DC.)MacLeish.A complete survey of 275 trees on four plots was undertaken out to compare the genetic variation of a managed stand with an unmanaged *** genotyped all adult and juvenile individuals 60 months after the management and compared the genetic diversity and the spatial genetic structure *** diversity was considered high because of an efficient gene flow between *** were no genetic differences between stands and no evidence of *** clustering identified a single population(K=1),indicating no genetic differentiation between managed and unmanaged *** and juvenile individuals of the unmanaged stand were more geographically structured than individuals from the managed *** was a tendency of coancestry among juveniles at the first class of distance of the managed stand,suggesting a drift of genetic structure possibly caused by *** early responses to management on genetic diversity and stand structure is a first step to ensuring the effectiveness of conservation practices of tree *** sustainability of forest management of *** on genetic diversity,and more accurately,on spatial genetic structure needs evaluation over time to promote effective conservation of the population size and genetic variability.

关键词： Genetic diversity Microsatellite markers Gene flow Silvicultural management Brazilian Cerrado

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澳大利亚旅游业及澳中旅游

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南开经济研究 1989年第4期 41-44页

作者： clem Tisdell 温洁

clem Tisdell先生是澳大利亚昆士兰大学经济学系教授,于1989年4月来中国南开大学旅游学系讲学,这里选译的是他全部讲稿中的一部分内容。

关键词：澳大利亚旅游者国际游客中国境内旅游业旅游需求新西兰市场外国停留

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