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Journal of power and Energy Engineering 2020年第7期8卷 1-14页

作者： Théodore patrice Nna Nna Salomé Ndjakomo Essiane stève pérabi ngoffé Technology and Applied Sciences Laboratory University of Douala Douala Cameroon

This paper presents the control of the active filter by Duty Cycle Modulation (DCM) for the harmonic pollution control of a three-phase electrical system. Several research works have preceded this work, but most of them deal with the control by pulse-width modulation and the differences lie around the THD reduction performance, the quality of the wave obtained, the simplicity of the scheme and the cost of the control. For this purpose, we propose a very innovative approach to active filter control which aims at reducing the current THD at a lower rate than pulse-width modulation techniques improving at the same time the wave quality with a more simplified control scheme. First we present the schematic diagram of the active filter, then we present the design of the control of this active filter based on the real and imaginary instantaneous power method which uses the algebraic “Clark” transformation. The Duty Cycle Modulation controller is used to obtain the required control commands to be injected to the inverter. We then developed a simulink model of the active filter to validate this study. The simulations were performed in the Matlab/Simulink environment. The results obtained show a significant improvement on the harmonic current control techniques for the THD of 1.02% which was 26.25%, the elimination of noise in the signal and the simplicity of the control with an easier implementation than the pulse width modulation (pWM) make the Duty Cycle Modulation (DCM) control a very promising tool.

关键词： pWM DCM Active Filter Inverter

Mercury emissions and partitioning from Indian coal-fired power plants

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Journal of Environmental Sciences 2021年第2期33卷 28-33页

作者： Hridesh Agarwalla rabi Narayan Senapati Tarit Baran Das Coal Minerals&Heauy Metal Research Group CSIR-Central Institute of Mining and Furl ResearchDhcmbad-82810India

In India coal combustion is the single largest source of emission of mercury which is a widespread persistent global toxicant,travelling across international borders through air and *** a party to the Minamata convention,India aims to monitor and reduce Hg emissions and stricter norms are introduced for mercury emissions from power plants(30μg/Nm 3 for flue gas in stack).This paper presents the results obtained during the experimental studies performed on mercury emissions at four coal-fired and one lignite-fired power plants in *** mercury concentration in the feed coal varied between 0.12-0.27 mg/*** the mercury mass balance,significant proportion of feed coal mercury has been found to be associated with fly ash,whereas bottom ash contained very low mercury.80%-90%of mercury was released to air through stack ***,for circulating fluidised bed boiler burning lignite,about 64.8%of feed mercury was found to get captured in the fly ash and only 32.4%was released to *** mercury emission factor was found to lie in the range of 4.7-15.7 mg/GJ.

关键词： Coal combustion Emission Mercury Flue gas Thermal power plant

The effect of urea pretreatment on the formaldehyde emission and properties of straw particleboard

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Journal of Forestry Research 2012年第3期23卷 497-502页

作者： Hojat Hematabadi rabi Behrooz Department of Wood and paper Science and Technology College of Natural ResourcesTarbiat Modares UniversityP.O.Box 46414-356NoorIran

For manufacturing low-formaldehyde emission particleboard from wheat straw and urea-formaldehyde （UF） resins using urea treatment for indoor environments, we investigated the influence of urea treatment on the formaldehyde emission, physical and mechanical properties of the manufactured particleboard. Wheat straws were treated at three levels of urea concentration （5%, 10%, 15%） and 95℃ as holding temperature. Wheat straw particleboards were manufactured using hot press at 180℃ and 3 Mpa with two types of UF adhesive （UF-45, UF-91）. Then the formaldehyde emission values, physical properties and mechanical properties were considered. The results show that the for- maldehyde emission value was decreased by increasing urea concentration. Furthermore, the results indicate that the specimens under urea treatment have better mechanical and physical properties compared with control specimens. Also specimens under urea treatment at 10% concentration and UF-91 type adhesive have the most optimum physical and mechanical strength.

关键词： formaldehyde emission physical and mechanical properties wheat straw particleboard Urea formaldehyde resin

Finite projective Geometries and Classification of the Weight Hierarchies of Codes(Ⅰ)

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Acta Mathematica Sinica,English Series 2004年第2期20卷 333-348页

作者： WenDeCHEN TorleivKLφve LaboratoryofSystemsandControl CenterofInformationSecurityAcademyofMathematicsandSystemsScienceChineseAcademyofSciencesBeijing100080P.R.China Departmentoflnformatics UniversityofBergenBergenHighTechnologyCenterN-5020BergenNorway

The weight hierarchy of a binary linear [n, k] code C is the sequence (d 1, d 2, . . . , d k ), where d r is the smallest support of an r-dimensional subcode of C. The codes of dimension 4 are collected in classes and the possible weight hierarchies in each class is determined by finite projective geometries. The possible weight hierarchies in class A, B, C, D are determined in part (I). The possible weight hierarchies in class E, F, G, H, I are determined in part (II).

关键词： Weight hierarchy Support weight Finite projective geometries Binary linear code Chain condition Difference sequence

Analysis of vibration signal responses on pre induced tunnel defects in friction stir welding using wavelet transform and empirical mode decomposition

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Defence Technology（防务技术） 2019年第6期15卷 885-896页

作者： J.rabi T.Balusamy R.Raj Jawahar Vinayaka Mission’s Kirupananda Variyar Engineering College SalemIndia Department of Mechanical Engineering Government College of EngineeringSalemIndia Department of Mechanical Engineering Dynamech Design SolutionsChennaiIndia

Among many condition-monitoring systems in welding operation,Defect identification is an important method to ensure the precision in finishing *** stir welding is a solid state welding process used to join two metals without the use of electrode at lower *** aim of this present work is to identify and localize the tunnel defect in aluminum alloy and measure the distance of the defect zone in the time domain of the vibration signal during Friction stir *** vibration signals are captured from the experiments and the burst in the vibration signal is focused in the analysis.A signal-processing scheme is proposed to filter the noise and to measure the dimensional parameters of the defect *** proposed technique consists of discrete wavelet transform(DWT),which is used to decompose the *** enveloping technique is applied on the decomposed zero padded *** continuous wavelet transform(CWT) has been implemented on detailed signal followed by a time marginal integration(TMI) of the CWT *** mode decomposition(EMD) is used to replace the detailing coefficients from DWT with Intrinsic Mode Function(IMF).statistical parameters such as mean,kurtosis,S.D and crest factor have been extracted from the final filtered signal for validating the defect welds from the control defect free *** produced were found to be that kurtosis is 7.4402 for tunnel defect induced weld and 3.3862 for defect free *** the increase in kurtosis value predicts the defect zone impact in the *** measurement of the defect zone of the cut 1(voids) and cut 2(tunnel grooves) in correlation with the processed signal is found to produce a much redundant results with an error rate of 0.02.

关键词： welding friction alloy

Auricularia polytricha and Flammulina velutipes ameliorate inflammation and modulate the gut microbiota via regulation of NF-κB and Keap1/Nrf2 signaling pathways on DSS-induced inflammatory bowel disease

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Food Bioscience 2022年第3期47卷 356-370页

作者： Ivan stève Nguepi Tsopmejio Miao Ding Jiali Wei Cong Zhao Yu Jiang Yuting Li Hui Song School of Life Science Jilin Agricultural UniversityJilinPR China Department of Animal Biology and physiology University of Yaoundé ICameroon Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi ChangchunPR China

Flammulina velutipes and Auricularia polytricha are two popular dietary mushrooms,especially in the Northeast of *** have revealed many pharmacological effects due to their bioactive compounds,but their possible mechanism of action involved in inflammation remains poorly ***,Inflammatory bowel disease(IBD)which is a chronic disease and progressive inflammation in the gastrointestinal tract were used to evaluate their anti-inflammatory and modulatory properties on the intestinal microbiota via the signaling pathways involved by oral administration of ***(Fve)and ***(ApE).Mice were daily received 3%DSS in the drinking water followed by the daily administration of Fve and *** food consumption,weight variation and DAI score were assessed during the experiment and inflammatory parameters,mRNA and protein expressions to determine the possible signaling pathways involved,and the gut microbiota from the cecum by high-throughput *** showed that ApE and Fve improved clinical symptoms,inflammatory cytokines and oxidative *** also attenuated the mRNA and proteins expressions in colon ***,ApE and Fve regulated DSS-induced intestinal dysbiosis and stimulated the SCFAs ***,ApE and Fve could improve DSS-induced IBD in mice suggesting that they represent novels therapeutic drugs and could be used as prebiotic to modulate the gut microbiota and preserve intestinal integrity.

关键词： Flammulina velutipes Auricularia polytricha Inflammatory bowel disease Signaling pathways Intestinal microbiota

Inversion of radiative transfer model for retrieval of wheat biophysical parameters from broadband reflectance measurements

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Information processing in Agriculture 2016年第2期3卷 107-118页

作者： Vinay Kumar Sehgal Debasish Chakraborty rabi Narayan Sahoo Division of Agricultural physics Indian Agricultural Research InstituteNew Delhi 110012India

This study describes the retrieval of wheat biophysical variables of leaf chlorophyll(Cab),leaf area index(LAI),canopy chlorophyll(CCC),and leaf wetness(Cw)from broadband reflectance data corresponding to IRS LISS-3(Linear Imaging Self Scanner)sensor by inversion of pROSAIL5B canopy radiative transfer *** data of wheat crop,grown under different treatments,were measured by hand-held spectroradiometer and later integrated to LISS-3 reflectance using its band-wise relative spectral response *** inversion techniques were used and their performance was compared using different statistical parameters and target *** inversion techniques tried were:a look up table with best solution(LUT-I),a look up table with mean of best 10%solutions(LUT-II)and an artificial neural network(ANN).All the techniques could estimate the biophysical variables by capturing variability in their observed values,though accuracy of estimation varied among the three *** diagram clearly depicted the superiority of LUT-II over the other two approaches indicating that a mean of best 10%solutions is a better strategy while ANN was worst performer showing highest bias for all the *** all the three inversion techniques,the general order of retrieval accuracy was LAI>Cab>CCC>*** range of Cw was very narrow and none of the techniques could estimate variations in *** most of the cases,the parameters were underestimated by model *** best identified LUT-II technique was then applied to retrieve wheat LAI from IRS LISS-3 satellite image of 5-Feb-2012 in Sheopur *** comparison with ground observations showed that the RMSE of LAI retrieval was about 0.56,similar to that observed in ground *** findings of this study may help in refining the protocol for generating operational crop biophysical products from IRS LISS-3 or similar sensors.

关键词： pROSAIL Look up table Neural network Leaf area index Chlorophyll content Target diagram IRS LISS-3

Operative vs non-operative management of displaced proximal humeral fractures in the elderly: A systematic review and meta-analysis of randomized controlled trials

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World Journal of Orthopedics 2015年第10期6卷 838-846页

作者： Santa rabi Nathan Evaniew Sheila A Sprague Mohit Bhandari Gerard p Slobogean Department of Clinical Epidemiology and Biostatistics Mc Master University Division of Orthopedics Department of SurgeryMc Master University Department of Orthopaedics University of Maryland School of MedicineR Adams Cowley Shock Trauma Center

AIM: To perform a systematic review and meta-analysis comparing operative vs non-operative treatment of displaced proximal humerus fractures in elderly ***: A systematic literature search was performed using EMBASE and MEDLINE through the OVID interface,CINAHL,the Cochrane Central Register of Controlled Trials(CENTRAL),proquest,Web of Science,SAE digital library,and Transportation Research Board's TRID *** of conference proceedings were also *** available randomized controlled trials comparing operative vs non-operative management of displaced three- and four-part proximal humerus fractures in elderly patients were *** primary outcomes measures included physical function,pain,health related quality of life,mortality,and the re-operation ***: Six randomized controlled trials(n = 287) were *** was no statistically significant difference in function(MD = 1.72,95%CI:-2.90-6.34,p = 0.47),as measured by the Constant score,between the operative and the non-operative treatment *** was no statistically significance difference insecondary outcomes of health related quality of life(standardized MD = 0.27,95%CI:-0.05-0.59,p = 0.09),and mortality(relative risk 1.29,95%CI: 0.50-3.35,p = 0.60).Operative treatment had a statistically significant higher re-operation rate(relative risk 4.09,95%CI: 1.50-11.15,p = 0.006),and statistically significant decreased pain(MD = 1.26,95%CI: 0.02-2.49,p = 0.05).CONCLUSION: There is moderate quality evidence to suggest that there is no difference in functional outcomes between the two *** high quality randomized controlled trials are required to determine if certain subgroup populations benefit from surgical management.

关键词： proximal humerus fracture Outcomes Operative treatment Non-operative treatment Metaanalysis

Unlocking hypoglycemia–associated brain microvascular dysfunction:critical insights from proteomic analysis

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Neural Regeneration Research 2025年第6期20卷 1707-1708页

作者： Siva S.V.p.Sakamuri Anil Sakamuri Department of Chemistry Auburn University at MontgomeryMontgomeryALUSA Vascular Biology Center and Department of Medicine Medical College of Georgia at Augusta UniversityAugustaGAUSA

Hypoglycemia-a critical complication linked to worsened brain function in diabetic subjects:Hypoglycemia is characterized by a decline in circulatory glucose levels below sta nda rd physiological *** hypoglycemia,classified as level 1 hypoglycemia,is defined by blood glucose levels below 70 mg/dL and can be effectively addressed through carbohydrate *** hypoglycemia,denoted by blood glucose levels less than 54 mg/dL,poses a life-threatening risk if left *** with type 1 and type 2 diabetes undergoing insulin treatment are particularly susceptible to hypoglycemia due to impaired counterregulatory mechanisms.

关键词： impaired intake critical

Small molecule inhibitor DDQ-treated hippocampal neuronal cells show improved neurite outgrowth and synaptic branching

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Neural Regeneration Research 2025年第9期20卷 2624-2632页

作者： Jangampalli Adi pradeepkiran priyanka Rawat Arubala p.Reddy Erika Orlov pHemachandra Reddy Department of Internal Medicine Texas Tech University Health Sciences CenterLubbockTXUSA Department of Nutritional Sciences College of Human SciencesTexas Tech UniversityLubbockTXUSA Department of pharmacology&Neuroscience Texas Tech University Health Sciences CenterLubbockTXUSA Department of Neurology Texas Tech University Health Sciences CenterLubbockTXUSA Department of Speech Language and Hearing SciencesTexas Tech University Health Sciences CenterLubbockTXUSA Department of public Health Texas Tech University Health Sciences CenterLubbockTXUSA

The process of neurite outgrowth and branching is a crucial aspect of neuronal development and *** and dendrites,sometimes referred to as neurites,are extensions of a neuron's cellular body that are used to start *** we explored the effects of diethyl(3,4-dihydroxyphenethylamino)(quinolin-4-yl)methylphosphonate(DDQ)on neurite developmental features in HT22 neuronal *** this work,we examined the protective effects of DDQ on neuronal processes and synaptic outgrowth in differentiated HT22cells expressing mutant Tau(mTau)*** investigate DDQ chara cteristics,cell viability,biochemical,molecular,western blotting,and immunocytochemistry were *** outgrowth is evaluated through the segmentation and measurement of neural *** neural processes can be seen and measured with a fluorescence microscope by manually tracing and measuring the length of the neurite *** neuronal processes can be observed and quantified with a fluorescent microscope by manually tracing and measuring the length of the neuronal ***-treated mTau-HT22 cells(HT22 cells transfected with cDNA mutant Tau)were seen to display increased levels of synaptophysin,MAp-2,andβ-***,we confirmed and noted reduced levels of both total and p-Tau,as well as elevated levels of microtubule-associated protein 2,β-tubulin,synaptophysin,vesicular acetylcholine transporter,and the mitochondrial biogenesis protein-pe roxisome prolife rator-activated receptor-gamma coactivator-1α.In mTa u-expressed HT22 neurons,we observed DDQ enhanced the neurite characteristics and improved neurite development through increased synaptic *** findings conclude that mTa u-HT22(Alzheimer's disease)cells treated with DDQ have functional neurite developmental chara *** key finding is that,in mTa u-HT22 cells,DDQ preserves neuronal structure and may even enhance nerve development function with mTa u inhibition.

关键词： diethyl(3 4-dihydroxyphenethylamino)(quinolin-4-yl)methylphosphonate(DDQ) hippocampal neuronal cells HT22 neurite outgrowth neuronal development small molecule