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Undersea Fiber Communication Systems 1st

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Recent antibacterial agents from biomass derivatives:Characteristics and applications

丛书名： Optics and Photonics (Formerly Quantum Electronics)

2002年

作者： José Chesnoy

ISBN: (数字)9780080492377

ISBN: (纸本)9780121714086

Description This book provides a detailed overview of the evolution of undersea communications systems, with emphasis on the most recent breakthroughs of optical submarine cable technologies based upon Wavelength Division Multiplexing, optical amplification, new-generation optical fibers, and high-speed digital electronics. The role played by submarine-communication systems in the development of high-speed networks and associated market demands for multiplying Internet and broadband services is also covered. Importance of This Topic This book will fill the gap between highly specialized papers from large international conferences and broad-audience technology review updates. The book provides a full overview of the evolution in the field and conveys the dimension of the large undersea projects. In addition, the book uncovers the myths surrounding marine operations and installations in that domain, which have remained known so far to only very few specialists.

关键词： Fiber optics.

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Journal of Bioresources and Bioproducts 2024年第3期9卷 283-309页

作者： Nissa Nurfajrin Solihat Alif Faturahman Hidayat R.A.Ilyas Senthil Muthu Kumar Thiagamani Nur Izyan Wan Azeele Fahriya Puspita Sari Maya Ismayati Mohammad Irfan Bakshi Zaharaddeen N.Garba M.Hazwan Hussin Witta Kartika Restu Wasrin Syafii Harits Atika Ariyanta Widya Fatriasari Research Center for Biomass and Bioproducts National Research and Innovation Agency(BRIN)Kawasan KST SoekarnoJl Raya Bogor KM 46 Cibinong Bogor 16911Indonesia Department of Bioproducts and Biosystems School of Chemical EngineeringAalto UniversityEspoo 16300Finland Department of Chemical Engineering Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaJohor 81310Malaysia Centre for Advanced Composite Materials Universiti Teknologi MalaysiaJohor 81310Malaysia Institute of Tropical Forestry and Forest Products Universiti Putra MalaysiaSerdang 43400Malaysia Centre of Excellence for Biomass Utilization Universiti Malaysia PerlisPerlis 02600Malaysia Department of Mechanical Engineering Kalasalingam Academy of Research and EducationKrishnankoil 626126India Institute of Bioproduct Development(IBD) Universiti Teknologi MalaysiaJohor 81310Malaysia Department of Chemistry Ahmadu Bello UniversityZaria 810211Nigeria Materials Technology Research group(MaTReC) School of Chemical SciencesUniversiti Sains MalaysiaMinden 11800Malaysia Research Center for Chemistry National Research and Innovation Agency(BRIN)Kawasan Puspiptek SerpongSouth Tangerang 15314Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor 16680Indonesia Department of Pharmacy Gunadarma UniversityDepok 16424Indonesia Research Collaboration Center of Biomass-Based Nano Cosmetic In collaboration with National Research and Innovation Agency(BRIN)SamarindaEast KalimantanIndonesia

Enhancing awareness of personal cleanliness and antibacterial resistance has intensified the antibacterial substance request on consumable products. Antibacterial agents that have been commercialized nowadays are produced from inorganic and non-renewable substances. This provides several drawbacks, particularly against health and environmental issues. Therefore, many scientists work on substituting fossil-fuel-based antibacterial agents with natural ones such as from biomass. Biomass derivatives, natural abundances of biopolymers in the world, amount to major compounds including polysaccharides (cellulose, hemicellulose, and chitosan) and polyphenol (tannin and lignin) substances which are capable to combat the growth of Gram-positive bacteria and Gram-negative bacteria. To date, no report focuses on a deep understanding of antibacterial properties derived from biomass and the internal and external factors effects. This work provides that gap because comprehensive knowledge is necessary before applying biomass to the products. The potency of biomass derivatives as antibacterial additives is also summarized. Basic knowledge of antibacterial characteristics to the application in products is highlighted in this review. Besides, the discussion about challenges and future perspectives is also delivered.

关键词： Antibacterial Application Biomass derivatives Challenge Future perspectives

A modified model of Lundberg-Palmgren rolling contact fatigue formula considering the effects of surface treatments

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Friction 2023年第10期11卷 1922-1938页

作者： Boyu ZHANG Huaiju LIU Peitang WEI Mario GUAGLIANO Shengwen HOU State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Dept.Mechanical Engineering Politecnico di MilanoMilano 20133Italy Shaanxi Fast Auto Drive Refco group Ltd. Xi’an 710119China

The Lundberg–Palmgren(L–P)fatigue life formula,as a statistical fatigue theory,has been widely used in the ***,its direct applicability is limited to the components treated by surface strengthening *** contact fatigue tests and surface integrity measurements of American Iron and Steel Institute(AISI)9310 rollers with several surface treatments were performed to address this *** on these results,a modified L–P fatigue model was proposed,enabling the consideration of surface modification including surface roughness,residual stress,and hardening introduced by different surface *** with the original L–P fatigue formula,its results are more accurate for surface strengthened ***,this method can assess the contact fatigue life of gears treated by surface strengthening techniques.

关键词： Lundberg-Palmgren(L-P)fatigue life formula surface strengthening techniques surface integrity contact fatigue life assessment

Multiproduct and multistage integrated production planning model and algorithm based on an available production capacity network

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1343-1352页

作者： Zhi-min Lü Tian-ru Jiang Zai-wei Li Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China China Ordins group CO. LTDBeijing 100089China

This research attempts to devise a multistage and multiproduct short-term integrative production plan that can dynamically change based on the order priority and virtual occupancy for application in steel plants. Considering factors such as the delivery time, varietal compatibility between different products, production capacity of variety per hour, minimum or maximum batch size, and transfer time, we propose an available production capacity network with varietal compatibility and virtual occupancy for enhancing production plan implementation and quick adjustment in the case of dynamic production changes. Here available means the remaining production capacity after virtual *** quickly build an available production capacity network and increase the speed of algorithm solving, constraint selection and cutting methods with order priority were used for model solving. Finally, the genetic algorithm improved with local search was used to optimize the proposed production plan and significantly reduce the order delay rate. The validity of the proposed model and algorithm was numerically verified by simulating actual production practices. The simulation results demonstrate that the model and improved algorithm result in an effective production plan.

关键词： short-term integrated plan constraint satisfaction model available production capacity varietal compatibility virtual capacity occupancy

Seasonal Time Series Analysis Based on Genetic Algorithm

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Journal of Donghua University(English Edition) 2007年第2期24卷 284-287页

作者：刘淑英程国建郑建国杨承勇 Department of Computer Science Xi'an Shiyou University Glorious Sun School of Business and Management Donghua University System Development Department Pingan Insurance(Group) Company of China LTD Shenzhen

Pattern discovery from the seasonal time-series is of importance. Traditionally, most of the algorithms of pattern discovery in time series are similar. A novel mode of time series is proposed which integrates the Genetic Algorithm (GA) for the actual problem. The experiments on the electric power yield sequence models show that this algorithm is practicable and effective.

关键词： time series Genetic Algorithm (GA) estimation analysis

Rheological investigations of the improved fine scheelite flotation spiked with agitation medium

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International Journal of Mining Science and Technology 2022年第6期32卷 1379-1388页

作者： Wei Chen Guofan Zhang Yangge Zhu College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China State Key Laboratory of Mineral Processing BGRIMM Technology GroupBeijing 100160China School of Mineral Processing and Bioengineering Central South UniversityChangsha 410083China

The fine scheelite flotation using garnet and glass beads as agitation medium was investigated through slurry rheology and froth property analysis. The apparent viscosity of fine scheelite, calcite and quartz(-20 μm) slurry were measured and the corresponding scheelite flotation behaviours, froth water recovery and froth height were studied. It was found that calcite slurry could aggregate into network structures and exhibit much higher apparent viscosity at the vicinity of pH 8.5–9.0 than scheelite and quartz(scheelite, calcite, and quartz slurry at 20.34, 38.66, and 14.58 mPa·s, respectively). Agitation medium containing garnet and glass beads could reduce the slurry apparent viscosity by effectively dispersing the calcite network structures in flotation slurry, and improve the fine scheelite flotation selectivity. As the apparent viscosity was reduced, the froth water recovery decreased from 24.33% to 6.37% and initial froth height of the flotation froth decreased from 69.6 to 8.7 mm, and finally results in increase in separation efficiency from 23.10% to 31.96%. The results could be potentially used in flotation of fine minerals by applying agitation medium to improve the process selectivity.

关键词： Rheology Flotation Fine scheelite Agitation medium

Understanding the adsorption mechanism of Ni(II) on graphene oxides by batch experiments and density functional theory studies

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Science China Chemistry 2016年第4期59卷 412-419页

作者： Yuantao Chen WeiZhang Shubin Yang Aatef Hobiny Ahmed Alsaedi Xiangke Wang School of Chemistry and Environment North China Electric Power UniversityBeijing 102206China Department of Chemistry Qinghai Normal UniversityXining 810008China NAAM Research group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

The graphene oxides （GOs） have attracted multidisciplinary study because of their special physicochemical properties. The high surface area and large amounts of oxygen-containing functional groups make GOs suitable materials for the efficient elimination of heavy metal ions from aqueous solutions. Herein the sorption of Ni（Ⅱ） on GOs was studied using batch experi- ments, and the results showed that the sorption of Ni（Ⅱ） is strongly dependent on pH and ionic strength at pH〈8, and inde- pendent of ionic strength at pH〉8. The sorption of Ni（Ⅱ） is mainly dominated by outer-sphere surface complexation and ion exchange at low pH, and by inner-sphere surface complexation at high pH. The interaction of Ni（Ⅱ） with GOs was also inves- tigated by theoretical density functional theory （DFT） calculations, and the results show that the sorption of Ni（Ⅱ） on GOs is mainly attributed to the -COH and -COC groups and the DFT calculations show that Ni（Ⅱ） forms stable GO_Ni_triplet struc- ture with the binding energy of -39.44 kcal/mol, which is in good agreement with the batch sorption experimental results. The results are important for the application of GOs as adsorbents in the efficient removal of Ni（Ⅱ） from wastewater in environ- mental pollution cleanup.

关键词： graphene oxides Ni(Ⅱ) sorption DFT calculation

Effect of Graphene Nanoribbons (TexasPEG) on locomotor function recovery in a rat model of lumbar spinal cord transection

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Neural Regeneration Research 2018年第8期13卷 1440-1446页

作者： C-Yoon Kim William K. A. Sikkema Jin Kim Jeong Ah Kim James Walter Raymond Dieter Hyung-Min Chung Andrea Mana James M. Tour Sergio Canavero Department of Stem Cell Biology School of Medicine Konkuk University Seoul Korea Department of Laboratory Animal Medicine College of Veterinary Medicine Seoul National University Seoul Korea Department of Chemistry Department of Materials Science and NanoEngineering and The NanoCarbon Center Rice University Houston TXUSA Biomedical Omics group Korea Basic Science Institute Cheongju-si Chungbuk Korea Research Service Hines Veterans Administration Hospital Hines IL USA HEAVEN/GEMINI International Collaborative group Turin Italy

A sharply transected spinal cord has been shown to be fused under the accelerating influence of membrane fusogens such as polyethylene glycol （PEG）（GEMINI protocol）. Previous work provided evidence that this is in fact possible. Other fusogens might improve current results. In this study, we aimed to assess the effects of PEGylated graphene nanoribons （PEG-GNR, and called ＂TexasPEG＂ when prepared as lwt% dispersion in PEG600） versus placebo （saline） on locomotor function recovery and cellular level in a rat model of spinal cord transection at lumbar segment 1 （L1） level. In vivo and in vitro experiments （n -- 10 per experiment） were designed. In the in vivo experiment, all rats were submitted to full spinal cord transection at L1 level. Five weeks later, behavioral assessment was performed using the Basso Beattie Bresnahan （BBB） locomotor rating scale. Immunohistochemical staining with neuron marker neurofilament 200 （NF200） antibody and astrocyt- ic scar marker glial fibrillary acidic protein （GFAP） was also performed in the injured spinal cord. In the in vitro experiment, the effects of TexasPEG application for 72 hours on the neurite outgrowth of SH-SYSY cells were observed under the inverted microscope. Results of both in vivo and in vitro experiments suggest that TexasPEG reduces the formation of glial scars, promotes the regeneration of neurites, and thereby contributes to the recovery of locomotor function of a rat model of spinal cord transfection.

关键词： nerve regeneration spinal cord transfection spinal cord fusion GEMINI TexasPEG graphene nanoribbons

Design and Optimization of Photonic Crystal Fiber Based Sensor for Gas Condensate and Air Pollution Monitoring

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Photonic Sensors 2017年第3期7卷 234-245页

作者： Md. Ibadul ISLAM Kawsar AHMED Shuvo SEN Sawrab CHOWDHURY Bikash Kumar PAUL Md. Shadidul ISLAM Mohammad Badrul Alam MIAH Sayed ASADUZZAMAN Department of Information and Communication Technology (ICT) Mawlana Bhashani Science and Technology University Santosh Tangail 1902 Bangladesh group of Bio-photomatix Tangail 1902 Bangladesh Department of Software Engineering (SWE) Daffodil International University Sukrabad Dhaka 1207 Bangladesh

In this paper, a hexagonal shape photonic crystal fiber （H-PCF） has been proposed as a gas sensor of which both micro-structured core and cladding are organized by circular air cavities. The reported H-PCF has a single layer circular core which is surrounded by a five-layer hexagonal cladding. The overall pretending process of the H-PCF is completed by using a full vectorial finite element method （FEM） with perfectly matched layer （PML） boundary condition. All geometrical parameters like diameters and pitches of both core and cladding regions have fluctuated with an optimized structure. After completing the numerical analysis, it is clearly visualized that the proposed H-PCF exhibits high sensitivity with low confinement loss. The investigated results reveal the relative sensitivity of 56.65% and confinement loss of 2.31×10^-5 dB/m at the 1.33%tm wavelength. Moreover, effective area, nonlinearity, and V-parameter of the suggested PCF are also briefly described.

关键词： Relative sensitivity confinement loss gas sensor effective area nonlinearity and photonic crystal fiber