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Artykuły w czasopismach na temat "Mimoza (Group)"
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Mustapa, Kasmudin, Amalia Rizky i Minarni Rama Jura. "Pengaruh Ekstrak Tanaman Putri Malu (Mimosa pudica Linn) Terhadap Penurunan Kadar Glukosa Darah Pada Mencit (Mus musculus)". Jurnal Akademika Kimia 6, nr 1 (8.12.2017): 7. http://dx.doi.org/10.22487/j24775185.2017.v6.i1.9222.
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The research aim is to determine the effect of mimosa plant (mimosa pudica Linn) to reduce blood sugar levels in mice and determining the effective concentration of mimosa plant extracts as an alternative to decrease blood sugar levels. The extract is produced by the infusion method. The animal test used is male mice with amount 18 mice that induced by EDTA (ethylene diamine tetraacetic acid). Mice are divided into 6 groups randomly with different treatment. The group I, II, III and IV were given the mimosa plant extract with a concentration of 10, 20, 30, and 40% (w/v) respectively while group V is given glibenclamide suspension as positive control (+) and group VI is given Na-CMC 1% as negative control (-). Data were analyzed using the statistical test analysis of variance (ANOVA) and then followed by Duncan test. The results showed that the mimosa plant extract contains flavonoids, alkaloids, and tannins. In preclinical testing of mimosa plant extract proven to reduce blood sugar levels in mice and the most effective concentration is a concentration of 20% (w/v) with significantly α = 0.05.
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Bessega, C., i R. H. Fortunato. "Section Mimadenia: its phylogenetic relationships within the genus Mimosa (Leguminosae, Mimosoideae) using plastid trnL - F sequence data". Australian Systematic Botany 24, nr 2 (2011): 104. http://dx.doi.org/10.1071/sb10022.
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Mimosa L. includes more than 530 species and is subdivided into five sections, including Mimadenia Barneby, Batocaulon DC., Habbasia DC., Calothamnos Barneby and Mimosa. It has previously been proposed that Mimosa is derived from piptadenioid ancestors and that section Mimadenia is a morphological group intermediate between the piptadenoid ancestor and the remaining species from Mimosa. The main goals of the present study were to assess the monophyly of the genus Mimosa as it is currently described, including representatives of all five sections, test the previous evolutionary hypothesis that section Mimadenia is primitive within Mimosa and discuss the infrageneric classification from a phylogenetic view. We report a phylogenetic analysis of chloroplast nucleotide sequences of the trnL intron and the trnL–trnF intergenic spacer from 36 species of Mimosa, and six related genera. Our analysis indicated that genus Mimosa is monophyletic, and the species of section Mimadenia constitute a clade sister to the rest of the genus. Although section Mimadenia, as described by Barneby (1991), seems to be monophyletic, the remaining sections Barneby (1991) proposed are not resolved as monophyletic. An effort needs to be made towards a new infrageneric classification of Mimosa that considers the phylogenetic evidence.
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EHI-Omosun, Mabel Bilu, i Jimoh Bello. "Effects of aqueous leaf extract of Mimosa pudica on insect repellent-induced injury in the lungs of adult Wistar rats". Anatomy Journal of Africa 12, nr 2 (17.08.2023): 2360–74. http://dx.doi.org/10.4314/aja.v12i2.4.
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The aim of this study was to investigate the effects of aqueous leaf extract of Mimosa pudica in the lungs of adult Wistar rats exposed to insect-repellent mist. 30 adult Wistar rats were randomly assigned into 5 groups; group A-E comprising of 6 rats per group. Group A rats were placed on rat food and water only. Group B rats were exposed to insect repellant only via inhalation. Group C rats were given Mimosa pudica extract orally at 500mg/Kg body weight per day (BWT/D) and Group D rats were exposed to Mosquito repellent and received low dose of the plant extract at (250mg/kg BWT/D) and Group E rats were exposed to mosquito repellent and received (500mg/kg BWT/D) of extract. The dosages were given for 30 consecutive days via orogastric method. There was significant increase in body weight in all treated groups. The haematological outcome showed that insect repellent caused some derangements in haematological parameters especially haematocrit, plateletcrit and mean corpuscular hemoglobin concentration. Histologically, Group D showed an expanded lumen of the bronchioles and shrunken activated immune system. Group E showed a more activated immune system and contracted bronchial artery. Mosquito repellant induced vascular ulceration, bronchiolar mucosal ulceration and activated lymphoid tissue in Group B. These effects were reversed by Mimosa pudica leaf extract. In conclusion, Mimosa pudica had ameliorative effect against mosquito repellant induced injury in the lungs.
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Azizah, Na'ilatul, Ika Buana Januarti, Annisa Masithoh i Anna Khoirun Nisa. "ANTIDIABETIC ACTIVITY FROM TABLETS EFFERVESCENT EXTRACT OF MIMOSA PUDICA LINN LEAVES". Jurnal Farmasi Sains dan Praktis 6, nr 2 (30.11.2020): 99–107. http://dx.doi.org/10.31603/pharmacy.v6i2.3008.
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The community has trusted mimosa pudica linn as an alternative antidiabetic treatment. Compounds that have antidiabetic activity in Mimosa pudica linn are flavonoids, alkaloids, and tannins. The selection of effervescent tablet dosage formulations is practical for diabetics with the addition of stevia leaf sweeteners. This study aimed to determine the antidiabetic activity of effervescent tablets of Mimosa pudica linn leaves extract as a natural antidiabetic. The research method begins with the extraction of plants using the maceration method of 70% ethanol; the tablet formulation uses dry granulation. Antidiabetic activity test using 28 male mice (Mus musculus) Swiss strain divided into four groups, namely group I (negative control): Na-CMC 0.5%, group II: effervescent tablets of Mimosa pudica Linn leaves Extract dose 600 mg/kgBB, group III (positive control): metformin 65 mg/kgBB, group IV (normal control): feed and drink. Each group, except normal controls, was induced by DM using alloxan 150 mg/kg body weight. Data on decreased blood glucose levels were analyzed using the Kruskal-Wallis statistical test the study results show that effervescent tablets meet the parameters of disperse time test, pH test, size uniformity test, weight uniformity test, hardness test, moisture test, and friability test. This study concludes is that there is a significant difference between the negative, positive, normal, and treatment control groups, which means that the administration of effervescent tablets of 70% ethanol extract of Mimosa pudica Linn leaves at a dose of 600 mg/kgBB can reduce blood sugar levels in mice (Mus musculus).
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Alain Hart Mann Youbi Mambou, Raymond Bess Bila, Bertrand Yuwong Wanyu, Cleabert Nwombobue Nkwemeh, Vanessa Tita Jugha, Liliane Laure Toukam, Orelien Sylvain Mtopi Bopda, Germain Sotoing Taiwe i Elisabeth Ngo Bum. "Antifatigue properties of an aqueous extract of Mimosa pudica Linn. (Fabaceae) in mice subjected to weight loaded force swimming test". GSC Biological and Pharmaceutical Sciences 18, nr 2 (28.02.2022): 224–33. http://dx.doi.org/10.30574/gscbps.2022.18.2.0069.
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Ethnopharmacological relevance: Traditionally, Mimosa pudica Linn. (Fabaceae) is used for its anti-inflammatory, sedative, anxiolytic, antioxidant and antifatigue properties. Aim: To determine the antifatigue effects of Mimosa pudica aqueous extracts in experimental model of weight loaded force swimming test. Materials and methods: Mice were divided into seven groups and treated for 28 consecutive days as follows: groups one and two received orally distilled water (10 mL/kg) and served as normal group and negative control group, respectively. Groups three to six, (test groups) received orally graded doses of Mimosa pudica (20, 40, 80 and 160 mg/kg) and group seven (positive control) received vitamin C (50 mg/kg), respectively. One hour after the treatment, mice were subjected to the weight loaded force swimming test with tail load, except for the normal group; and the swimming duration, body weight, food and water intake were measured. Twenty-four hours after the last treatment the serum level of noradrenaline, dopamine and serotonin, and the relative organs weight were measured. Results: Mimosa pudica aqueous extracts significantly and dose-dependently increased the swimming duration and the weight of heart and lungs. The extracts did not induce a significant variation in the level of food and water intake, body weight, and serum of noradrenaline, dopamine and serotonin. Conclusion: Pretreatment of mice with Mimosa pudica aqueous extracts was observed to have better antifatigue properties mediated via amelioration of swimming capacity and physical aptitude in the weight loaded force swimming model.
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Morales, Matías, Renée Fortunato i Marcelo Simon. "A New Species of Mimosa L. ser. Bipinnatae DC. (Leguminosae) from the Cerrado: Taxonomic and Phylogenetic Insights". Plants 9, nr 8 (24.07.2020): 934. http://dx.doi.org/10.3390/plants9080934.
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Mimosa carolina (Leguminosae), a new species from the Parque Nacional Chapada das Mesas, located in the northern limit of the Brazilian Cerrado, is described and illustrated. In addition, a phylogenetic reconstruction was performed to recover the position of this species in relation to the main clades of the genus Mimosa. This new species is assigned to sect. Habbasia ser. Bipinnatae and exhibits relevant morphological differences with all described species of this series, most notably the prostate habit, glabrous stems, and absence of internal spicules. Our results indicate that this new entity is clearly nested in a strongly supported clade with other striated-corolla species of ser. Bipinnatae. Therefore, ser. Bipinnatae appears to be monophyletic, and a morphologically and ecologically cohesive group within Mimosa. An updated identification key for this series is provided.
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Bagaskara, Andre, Nenny Triastuti, Nurma Yuliyanasari, Yudith Annisa Ayu Rezkitha, Muhammad Anas i Ricky Indra Alfaray. "Efficacy of Putri Malu Leaf Plant (Mimosa Pudica Linn) as Hepatoprotectors on Ibuprofen Induced Hepatic Damage in White Mice (Mus Musculus)". MAGNA MEDICA Berkala Ilmiah Kedokteran dan Kesehatan 9, nr 1 (1.02.2022): 01. http://dx.doi.org/10.26714/magnamed.9.1.2022.01-09.
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Background:Putri Malu plants (Mimosa pudica linn) contain flavonoid compounds that are useful as hepatoprotectors. Putri Malu plants extract can be usefull to prevent problem such as Ibuprofen-induced hepatic damage., but study that focus on this topic remain scarce in Indonesia. Objective: To prove the extracted content of the leaves of the Putri Malu plant (Mimosa pudica linn) as a hepatoprotector of hepatic damage in mice (Mus musculus) induced by Ibuprofen. Method: This randomized post-test control group design was conducted at the Experimental Animal Laboratory, Faculty of Veterinary Medicine, Universitas Airlangga. A total of 28 mice were treated with four condition then underwent SGOT and SGPT blood laboratory tests. Results: Group P1 (placebo) had SGOT and SGPT levels averaging 23.87 mg/dl and 13.45 mg/dl, group P2 (ibuprofen dose 7 mg/KgBW) had SGOT and SGPT levels of 29.13 mg/dl and 19.10 mg/dl, group 3 (Putri Malu extract 35 mg/KgBW) had SGOT and SGPT of 24.05 mg/dl and 13.56 mg/dl, and group 4 (ibuprofen dose 7 mg/KgBW and Putri Malu extract of 35 mg/KgBW) showed SGOT and SGPT levels of 28.23 mg/dl and 18.35 mg/dl. The four groups had different mean SGOT and SGPT levels (P 0,000). Conclusion:Leaf extract of the Putri Malu plants (Mimosa pudica linn) has a chemical effect of heaptoprotector as shown by the decrease in SGOT and SGPT level.
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Permatasari, Roselia Yuliani, Eka Pramyrtha Hestianah, Djoko Legowo, Kadek Rachmawati i Zainal Arifin. "The Effect of Mimosa Pudica Root Extract on Cerebrum Histopathological of Rattus Norvegicus Induced with Naja Sputatrix Venom". Journal of Basic Medical Veterinary 11, nr 1 (29.06.2022): 37–48. http://dx.doi.org/10.20473/jbmv.v11i1.36485.
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The aim of this study was to know the effect of Mimosa pudica root extract on histopathological appearance of Rattus norvegicus brain induced by Naja sputatrix venom. Thirty rats were divided into 5 groups. There were 2 control groups and 3 treatment groups, which was given 250, 500, and 1000 mg/kg BW of Mimosa pudica root extract orally. The first 7 days each group was adapted to the environment. On the 8th day, the treatment was started by injecting Naja sputatrix LD50 (0,13 L/gram BW) IM in gluteus muscle, continued with giving Mimosa pudica root extract orally for the treatment groups 5 minutes after venom injection. 6 hours after the last treatment, rats were killed by cervical dislocation, injected with formalin 10% in the heart, then necropsied. Histopathological evaluation was done to score brain damage based on meningitis, perivascular cuffing, and necrotic cells using HE stain with 1000x magnification. The result showed 1000 mg/kg BW dosage of Mimosa pudica root extract can reduce brain damage based on meningitis, perivascular cuffing, and necrotic cells in Rat (Rattus norvegicus) caused by Naja sputatrix venom and gave significant difference (p < 0.05) among the treatment groups.
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Rendragraha, Briantono Willy, Djoko Legowo, Suryo Kuncorojakti, Sri Chusniati i Arimbi Arimbi. "The Efficacy of Putrimalu Root Extract (Mimosa pudica) Against Mortality and Histopathological of Rat Muscles Injected Naja sputatrix Venom". Journal of Basic Medical Veterinary 11, nr 1 (29.06.2022): 1–11. http://dx.doi.org/10.20473/jbmv.v11i1.36486.
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The purpose of this experiment was to know the effect of Mimosa pudica root extract (normal water extraction) on mortality and muscle histopatological in experimental animal (Rattus norvegicus) which injected with LD50 of Naja sputatrix venom. Fresh Mimosa pudica root dried without sunshine and ground into coarse powder with steamroller (mash 3mm). Plant extract were prepared by stirring 4 g of the powder into 200 ml of water for 3 hours at room temperature and filtered with muslin cloth before freezdried. 30 rat divided into five groups, P0(C+), P1(C-) P2, P3, and P4. P0 (positive control group) injected by saline intra muscular and given aquadest peroral after five minutes, P1 (negative control) injected with Naja sputatrix venom and given aquadest peroral after five minutes. P2, P3, and P4 injected by Naja sputatrix venom and given Mimosa pudica extract with 250mg/KgBW, 500mg/KgBW, and 1000mg/KgBW doses. All of the experimental animal observed about six hours and than euthanized, musculus gluteus maximus (location of injection) was taken for histopatological examination. In this experiment observed that the normal water extraction of mimosa pudica can’t reduce mortality of experimental animals but it can decrease muscle damage in 1000mg/KgBW dose.
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Khan, N. I., i B. C. Hatapakki. "Anti-Inflammatory Activity of Mimosa hamata (Willd.)". Journal of Drug Delivery and Therapeutics 9, nr 5-s (15.10.2019): 34–39. http://dx.doi.org/10.22270/jddt.v9i5-s.3596.
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Anti-inflammatory activity of ethanolic extract of roots, stems and leaves Mimosa hamata was investigated at the doses of 200 and 400 mg/kg using carrageenan induced paw edema and cotton pellet granuloma technique in albino rats. The stem extracts showed significant activity in dose dependent manner as compared to control group. The observations suggested that the extract of M. hamata were effective in exudative and proliferative phases of inflammation i.e. in acute and chronic inflammation. The results obtained indicate that M. hamata has an anti-inflammatory activity that supports the folk medicinal use of the plant.
Keywords: Mimosa hamata, anti-inflammatory activity, carrageenan induced paw edema, cotton pellet granuloma.
Rozprawy doktorskie na temat "Mimoza (Group)"
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Ji, Hui. "Study and optimization of new differential space-time modulation schemes based on the Weyl group for the second generation of MIMO systems". Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0021/document.
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Actuellement, l’étude des systèmes multi-antennaires MIMO (Multiple Input Multiple Output) est orientée dans beaucoup de cas vers l’augmentation considérable du nombre d’antennes de la station de base (« massive MIMO », « large-scale MIMO »), afin notamment d’augmenter la capacité de transmission, réduire l’énergie consommée par bit transmis, exploiter la dimension spatiale du canal de propagation, diminuer l’influence des évanouissements, etc. Pour les systèmes MIMO à bande étroite ou ceux utilisant la technique OFDM (Orthogonal Frequency Division Multiplex), le canal de propagation (ou les sous-canaux correspondants à chaque sous-porteuse d’un système OFDM) sont pratiquement plats (non-sélectifs en fréquence), ce qui revient à considérer la réponse fréquentielle de chaque canal SISO invariante par rapport à la fréquence mais variante dans le temps. Ainsi, le canal de propagation MIMO peut être caractérisé en bande de base par une matrice dont les coefficients sont des nombres complexes. Les systèmes MIMO cohérents nécessitent pour pouvoir démoduler le signal en réception de disposer de la connaissance de cette matrice de canal, donc le sondage périodique, en temps réel, du canal de propagation. L’augmentation du nombre d’antennes et la variation dans le temps, parfois assez rapide, du canal de propagation, rend ce sondage de canal difficile, voire impossible. Il est donc intéressant d’étudier des systèmes MIMO différentiels qui n’ont pas besoin de connaître la matrice de canal. Pour un bon fonctionnement de ces systèmes, la seule contrainte est que la matrice de canal varie peu pendant la transmission de deux matrices d’information successives. Le sujet de cette thèse concerne l’étude et l’analyse de nouveaux systèmes MIMO différentiels. On considère des systèmes à 2, 4 et 8 antennes d’émission, mais la méthode utilisée peut être étendue à des systèmes MIMO avec 2n antennes d’émission, le nombre d’antennes de réception étant quelconque. Pour les systèmes MIMO avec 2 antennes d’émission qui ont été étudiés dans le cadre de cette thèse, les matrices d’information sont des éléments du groupe de Weyl. Pour les systèmes avec 2n antennes d’émission, (n ≥ 2), les matrices utilisées sont obtenues en effectuant des produits de Kronecker des matrices unitaires du groupe de Weyl. Pour chaque nombre d’antennes d’émission on identifie d’abord le nombre de matrices disponibles et on détermine la valeur maximale de l’efficacité spectrale. Pour chaque valeur de l’efficacité spectrale on détermine les meilleurs sous-ensembles de matrices d’information à utiliser (selon le spectre des distances ou le critère du produit de diversité). On optimise ensuite la correspondance ou mapping entre les vecteurs binaires et les matrices d’information. Enfin, on détermine par simulation les performances des systèmes MIMO différentiels ainsi obtenus et on les compare avec celles des systèmes similaires existants. […]At present, the study of multi-antenna systems MIMO (Multiple Input Multiple Output) is developed in many cases to intensively increase the number of base station antennas («massive MIMO», «largescale MIMO»), particularly in order to increase the transmission capacity, reduce energy consumed per bit transmitted, exploit the spatial dimension of the propagation channel, reduce the influence of fading, etc. For MIMO systems with narrowband or those using OFDM technique (Orthogonal Frequency Division Multiplex), the propagation channel (or the sub-channels corresponding to each sub-carrier of an OFDM system) are substantially flat (frequency non-selective). In this case the frequency response of each SISO channel is invariant with respect to frequency, but variant in time. Furthermore, the MIMO propagation channel can be characterized in baseband by a matrix whose coefficients are complex numbers. Coherent MIMO systems need to have the knowledge of the channel matrix to be able to demodulate the received signal. Therefore, periodic pilot should be transmitted and received to estimate the channel matrix in real time. The increase of the number of antennas and the change of the propagation channel over time, sometimes quite fast, makes the channel estimation quite difficult or impossible. It is therefore interesting to study differential MIMO systems that do not need to know the channel matrix. For proper operation of these systems, the only constraint is that the channel matrix varies slightly during the transmission of two successive information matrices. The subject of this thesis is the study and analysis of new differential MIMO systems. We consider systems with 2, 4 and 8 transmit antennas, but the method can be extended to MIMO systems with 2n transmit antennas, the number of receive antennas can be any positive integer. For MIMO systems with two transmit antennas that were studied in this thesis, information matrices are elements of the Weyl group. For systems with 2n (n ≥ 2) transmit antennas, the matrices used are obtained by performing the Kronecker product of the unitary matrices in Weyl group. For each number of transmit antennas, we first identify the number of available matrices and the maximum value of the spectral efficiency. For each value of the spectral efficiency, we then determine the best subsets of information matrix to use (depending on the spectrum of the distances or the diversity product criterion). Then we optimize the correspondence or mapping between binary vectors and matrices of information. Finally, the performance of differential MIMO systems are obtained by simulation and compared with those of existing similar systems. […]
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Awad, Mazen. "Le système O-MIMO utilisant un multiplexage par la technique de diversité de groupe de mode (MGDM)". Valenciennes, 2009. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/b2c89025-99d1-4157-8bfa-ce802b2249c2.
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Avec sa bande passante énorme, la fibre MMF semble le seul média capable d’offrir un système multiservices à hauts débits dans les réseaux d’entreprises et "in-door". Un réseau MMF peut constituer l’épine dorsale du réseau qui alimente les services fixe-filaire (tels que les services de données GbE), ainsi que les services sans fil (IEEE 802. X par exemple) dans l’ensemble du bâtiment par une technique de multiplexage. Une telle technique doit optimiser le rapport efficacité/ coût. Dans ce travail, notre attention s’est focalisée sur la technique O-MIMO, basée sur la technique de multiplexage MGDM. Cette technique exploite au maximum la bande passante de la fibre par une excitation focalisée et augmente la capacité de la fibre au moyen d’injections et de réceptions spatiales de lumière. Nous avons établi par une étude théorique un modèle analytique de la fibre MMF pour la technique MGDM. Nous avons étudié les meilleures conditions d’émission et de réception pour améliorer la qualité et la capacité du système. Ainsi, afin de rapprocher notre modèle de la réalité, les effets mécaniques agissant sur la fibre sont modélisés analytiquement. Une étude théorique complète, abondée par des simulations, est présentée et les imperfections des éléments du réseau optique sont prises en compte. De plus, dans le but d’assurer la transmission de tous les services mixtes (en bande de base et radio), nous avons proposé un modèle de multiplexage basé sur MGDM, avec une orthogonalité entre les services radio et les autres services. Cette orthogonalié est basée sur une différence de puissances et de fréquences optiques entre l’émetteur associé au service radio et les autres. Ce modèle est validé par une simulation sur le logiciel VPI systems, pour plusieurs utilisateurs et plusieurs débits binaires allant jusqu’à 5 Gb/s. Cette présentation est complétée par notre contribution à l’élaboration du cahier des charges d’une expérimentationDue to its enormous bandwidth, the MMF fiber seems the only medium able to offer a broadband multiservices system in the office and "in-door" networks. A MMF network can constitute the backbone of the network which feeds the fixed-wired services (such as the data services GbE), as well as the wireless services (IEEE 802. X for example) in the whole building using a multiplexing technique. Such a technique must meet a high efficacy/cost ratio. In this work, our attention focused on the O-MIMO technique, based on aMGDMmultiplexing. This technique exploits at most the fibre bandwidth by a focused excitation and increases the fibre capacity using spatial launching and reception. We established, by a theoretical study, an analytical model of the MMF fibre for MGDM technique. We studied the best conditions of emission and reception, to improve the system quality and capacity. So, to take the real environment into account on our model, mechanical effects acting on the fiber are analytically modelled. A theoretical complete study, supported by simulations, is presented and the imperfections of the elements of the optical network are taken into account. Moreover, in order to ensure the transmission of all mixed services (baseband and radio), we proposed a model based on MGDM multiplexing with orthogonality between radio services and other services. This orthogonality is based on a difference in powers and optical frequencies between the transmitter associated with the radio service and the others. This model is demonstrated by simulation, by using VPI Systems software, for multiple users and multiple bit rates up to 5 Gb/s. This presentation is completed by our contribution to the elaboration of the specifications of an experiment
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Chen, Bo-Sing, i 陳柏興. "Fast Group Symbol Detection Schemes and Hardware Design for Massive MIMOs". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/939pmc.
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碩士國立臺灣海洋大學
電機工程學系
105
In the thesis we present two fast group detection schemes for massive MIMO systems. First, a number G, (e.g., G = 2 or G = 3) is chosen as the size of each group. Then, the proposed schemes recursively compute the MMSE detectors group by group to facilitate symbol detection. Specifically, to avoid the huge complexity required to directly compute the MMSE detectors, the schemes recursively find the corresponding assistant matrices to help determine the groups and calculate the MMSE detectors. As a result, the transmitted symbols can be recursively estimated group by group. Furthermore, to concurrently receive the spatial diversity and spatial multiplexing gains, we also extend the two above schemes and propose a corresponding fast detection method for massive G-STBC MIMO systems. Our MATLAB simulation results and complexity analysis show that the proposed schemes can achieve a performance close to that of the conventional V-BLAST algorithm with a significant saving in computational complexity. To test the physical implementation, we further carry out the hardware design of the proposed schemes. For this, one of the above proposed schemes, namely FGD-B, is coded with Verilog HDL(Hardware Description Language) for the massive MIMO system with M = 24 transmit antennas and N = 100 receive antennas. The hardware modules we designed include SIPO (Serial-In/Parallel-Out) shift registers, a computing unit and a controller. Specially, the hardware computing unit only contains one Divider and two Multiplier. Finally, the hardware simulation results achieve almost the same as the above MATLAB's. In addition, compared to the existing method, the proposed hardware architecture for FGD-B is simple and feasible.
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CHIOU, JENG-HAO, i 邱政豪. "Pilot Contamination Precoding Design for Massive MIMO TDD Multicell Group Systems". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3n4v42.
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碩士國立中正大學
通訊工程研究所
105
In the thesis, a pilot contamination precoding design is proposed based on massive multiple-input multiple-output (MIMO) time-division duplex (TDD) multi-cell group systems. In order to achieve high transmission rate, the integration of massive MIMO and two-layer multi-cell system architecture has been regarded as a promising technology in future fifth-generation (5G) communication system. The two-layer multi-cell architecture consists of macro cells and small cells. Macro cells use the existing 4G system while small cells use 5G technology to provide higher high data rate and system capacity. In order to improve data rate of wireless networks is required with accurate channel states information. Since multi-cell use the same pilot sequences for channel training, the channel estimation is to be inaccurate and cause pilot contamination. Therefore, pilot contamination precoding is designed based on multi-cell system, and study the effects of two pilot contamination precoding designs in terms of system sum-rate. Through the multi-cell group architecture assigned to use different pilot sequence to small cells, eliminate the pilot contamination of adjacent cells and reduce the high system complexity budgets when using pilot contamination precoding alone.
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Chung, Chih-Yung, i 鍾智勇. "Low Complexity Adaptive Group Detection in Layered Space-Time MIMO Wireless Communications". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/00852466081119324125.
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碩士國立臺灣科技大學
電子工程系
93
Spatial multiplexing (SM) is one of the major signaling techniques in multiple-input multiple-output (MIMO) systems. The SM schemes can provide a linear increase in the capacity without additional power or bandwidth consumption. The layered space-time (LAST) architectures use the multi-element antenna arrays (MEAs) at both transmitter and receiver is the most notable exploitation of SM schemes. In this thesis, we discuss the detection techniques of the LAST (also known as the vertical Bell Laboratories layered space-time (V-BLAST) scheme) for both single user (SU) and multiuser (MU) MIMO wireless communication systems. To strike a better tradeoff between computational complexity and performance, a simple, yet effective group detection with adaptive group order successive interference cancellation (AGOSIC) is addressed. The new approach sequentially peels off the detected signals group by group in a descending order of power levels, and, most noticeable, the number of users in each group are adaptively determined based on the average of the post signal to noise ratio (SNR) to achieve a better ordering of signals. More specifically, according to the threshold, which is stage dependent, the remaining signals in each stage are partitioned into two groups: the desired group and the residual group. After conducting the layered space-time processing scheme, the signals in the desired group, whose SNRs are all greater than or equal to the threshold, are then removed. The whole process is repeated until all users are detected. The new scheme can suppress the effect of multiple access interference (MAI) in the MU-MIMO, and adaptively mitigate the effect of multiple access interferences (MSI) in both SU-MIMO and MU-MIMO.
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Lin, Li-Lin, i 林俐泠. "Coordinated Multi-Cell MIMO Beamforming Design Based on Group Maximum SINR Filtering". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/35944982749456731161.
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碩士國立臺灣大學
電信工程學研究所
100
In multi-cell multi-input multi-output (MIMO) channel where multiple base stations with multiple antennas transmit signals to a group of users with multiple antennas in their own cell, both interfering transmitters and data streams to different users in the same cell will cause interference to one user and thus decrease system’s throughput. By judiciously modifying the duality principle which is developed for single cell scenario to our multi-cell case, we propose an efficient approach to the joint transmit-receive beamforming and power allocation for each cell based on iterative method. We adopt group maximum signal-to-interference-plus-noise-ratio (SINR) filter banks (GSINR-FB) as our beamformers and the average SINR is served as a metric to measure the quality of service (QoS). Moreover, we find a balancing SINR structure for optimal power allocation form to guarantee fairness of each user. We also propose a heuristic power allocation for sum rate maximization. The proposed algorithm can coordinate signal across cells, users in one cell and even data streams in one user to achieve better performance. Simulation results verify these proposed algorithms can align interference effectively and outperform other existing methods.
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Peng-YuLai i 賴鵬宇. "Group-based Beam Tracking and Pilot Interference Management for Beamspace MU-MIMO". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/264bsr.
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碩士國立成功大學
電腦與通信工程研究所
106
In recent year, beam tracking plays a big role in 5G mmWave wireless communications. Because of severe power attenuation of mmWave transmission, the exploitation of antenna gain provided by a large antenna array and directional transmission through beamforming have been extensively considered to enhance the transmission rate of coverage of mmWave. For mmWave communication based on beamforming, tracking the direction of individual user equipment(UE) is of vital importance to maximize the directional transmission gain. Numerous beam tracking schemes have been developed. Some of them track UEs by prediction. According to historical tracking results, the UE’s spatial direction can be tracked following a known movement pattern. However, prediction-based tracking is sensitive to the error due to the inaccurate knowledge of the initial location. In addition, the movement pattern is seldom fixed and thus the prediction-based tracking can hardly implemented in practice. More importantly, all the existing tracking schemes either consider a single UE only or need to track multiple UEs one by one. We propose a beam tracking scheme that can track multiple UEs more efficiently. The proposed scheme keeps tracking the strongest beam for each UE by leveraging the spatial resolution inherent in the beamspace MIMO channel. Consequently, the strongest beam can be tracked without resorting to channel estimation and does not require any knowledge on the movement pattern. To track multiple UEs simultaneously, UEs are partitioned into groups and each group is assigned with an orthogonal pilot sequence. By allowing UEs of different groups to send pilot sequences using the same time resource, the base station (BS) is able to track them simultaneously. Simulation is performed to study the performance of the proposed beam tracking scheme in comparison with existing methods under the mobile scenario.
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LIU, YUE-FENG, i 呂岳峰. "Multistage Soft Group Information Assisted Layered Space-Time Multi-user Detection for MIMO-CDMA Systems". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/42486562030122523031.
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碩士國立臺灣科技大學
電子工程系
95
This thesis presents two novel group layered space-time multiuser detectors (MUDs) with the assistance of soft information for the uplink of multiple-input multiple output (MIMO) code division multiple access (CDMA) systems, in which the transmit antennas are divided into several virtual groups with the transmit antennas in each group being assigned a unique signature sequence. To effectively combat the interference, a multistage soft MMSE MUD is first addressed, which iteratively determine the MUD by incorporating the soft group information fed back from the previous iteration. Despite its high performance, the aforementioned MUD also calls for enormous amount of computations. To alleviate this setback, we also consider another MUD, which reconstructs the interference induced by other groups and then removes it from the received signal before proceeding the detection so as to lower the computational load. Conducted simulations demonstrate that both of the developed MUDs can offer significant performance gain compared with pervious works in various scenarios and that the second MUD considered is slightly inferior but with substantially reduced complexity.
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Kuo, Kuan-Chieh, i 郭冠杰. "Opportunistic Multicast Scheduling with Multiple Multicast Groups in Multicell MIMO Networks". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/26505752733135502371.
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碩士國立清華大學
通訊工程研究所
100
The use of opportunistic multicast scheduling (OMS) with transmit precoding is examined in this work for multicell MIMO systems with multiple multicast groups. In multicast systems, data transmitted by the base-stations (BSs) must be received by all intended receivers and, thus, the transmission rate is limited by the the worst intended receiver. OMS traditionally has been used to optimize the tradeoff between unicast and broadcast, but can have an even larger impact in systems with multiple multicast groups since users can be further selected in this case to avoid interference. Here, we assume that the base-stations (BSs) have knowledge of the data intended for all groups as well as the channel state information (CSI) of all links. The OMS and transmit precoder are designed based on two optimization criteria: the worst per-user throughput and the weighted sum throughput. Given the user selection, the problem of finding the optimal transmit precoder under both criteria are non-convex and, thus, are alternatively formulated as convex feasibility problems, which are solved by bisection search. Then, an outer optimization is performed to solve for the optimal user selection. However, since the problem is combinatorial in nature, the complexity of the problem can be intractable for systems with large number of users. Hence, iterative user selection (IUS) algorithms are proposed to reduce the complexity of the search. The effectiveness of the proposed schemes are demonstrated through computer simulations.
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Pan, Chunpo. "A Differential Polarization-time Coding Scheme for Polarization-division-multiplexed Fiber-optic Communication Systems". Thesis, 2010. http://hdl.handle.net/1807/25890.
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Polarization division multiplexing (PolDM) is a promising way to improve the spectral efficiency of fiber-optic communication systems. However, PolDM systems suffer greatly from polarization mode dispersion (PMD), especially in long-haul systems. PMD is time-varying and is intrinsically hard to compensate. Current PMD compensators are complicated and expensive to build, adding to the cost and complexity of practical PolDM systems. We propose a new differential polarization time coding scheme combined with controlled polarization rotation to increase the system tolerance to PMD. An encoding algorithm, a differential receiver design, and a decoding algorithm are described in detail. Controlled polarization rotation is achievable using conventional Mach-Zehnder interferometers that are used to modulate the signal. Simulation results show that significant improvement in PMD tolerance can be achieved with little added complexity. Given a certain transmission distance, our proposed system can also increase the achievable data rate compared to a PolDM differential quadrature phase shift keying system.
Książki na temat "Mimoza (Group)"
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Davide, Barbato, red. I teatri della Marcido Marcidorjs e Famosa Mimosa. Roma: E&S, 2006.
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Mimoza: Jak David Vávra a Tomáš Vorel objevovali pantomimu. Praha: Pražská scéna, 2007.
Znajdź pełny tekst źródłaCzęści książek na temat "Mimoza (Group)"
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Knop-Hülß, Katharina. "Deriving Dimensions of MIMA Group Chat Communication". W The Permanently Connected Group (PeCoG), 71–89. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-43238-6_4.
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Knop-Hülß, Katharina. "Explicating The Social Context: Applying Small Group Research to the MIMA Group Chat Phenomenon". W The Permanently Connected Group (PeCoG), 45–69. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-43238-6_3.
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Vershinin, George, Asaf Cohen i Omer Gurewitz. "Robust Group Testing-Based Multiple-Access Protocol for Massive MIMO". W Cyber Security, Cryptology, and Machine Learning, 200–215. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-34671-2_15.
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Tang, Jie, Yan Song, Chuting Lin, Wanmei Feng, Zhen Chen, Xiuying Zhang i Kai-kit Wong. "Energy Efficiency Optimization for Plane Spiral OAM Mode-Group Based MIMO-NOMA Systems". W Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 177–88. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-90196-7_16.
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Majidi Ivari, Sareh, Mohammad Reza Soleymani i Yousef R. Shayan. "RS-Based MIMO-NOMA Systems in Multicast Framework". W MIMO Communications - Fundamental Theory, Propagation Channels, and Antenna Systems. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112044.
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This chapter presents a novel scheme that integrates the rate-splitting (RS) technique in Multiple Input Multiple Output (MIMO) systems with non-orthogonal multiple access (NOMA) to improve performance and capacity in wireless communication systems under imperfect channel state information at the transmitter (CSIT) and in overloaded regimes. The proposed approach addresses a general and realistic scenario, incorporating both unicast and multicast users, aiming to increase system throughput through the optimization of precoding vectors and power allocation. A generic power allocation optimization technique is introduced, which can be employed for maximizing both the minimum-rate and sum-rate, focusing on the rate of the weakest user within each group per cluster. To tackle the non-convex nature of the problems, the proposed technique leverages the WMMSE-rate relationship and an alternating optimization (AO) algorithm, transforming the problem into a convex one. The chapter provides a comprehensive analysis of the proposed scheme, offering a tutorial background and presenting novel insights for an enhanced understanding.
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Zouari, Farouk, i Amina Boubellouta. "Adaptive Neural Control for Unknown Nonlinear Time-Delay Fractional-Order Systems With Input Saturation". W Advanced Synchronization Control and Bifurcation of Chaotic Fractional-Order Systems, 54–98. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5418-9.ch003.
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This chapter focuses on the adaptive neural control of a class of uncertain multi-input multi-output (MIMO) nonlinear time-delay non-integer order systems with unmeasured states, unknown control direction, and unknown asymmetric saturation actuator. The design of the controller follows a number of steps. Firstly, based on the semi-group property of fractional order derivative, the system is transformed into a normalized fractional order system by means of a state transformation in order to facilitate the control design. Then, a simple linear state observer is constructed to estimate the unmeasured states of the transformed system. A neural network is incorporated to approximate the unknown nonlinear functions while a Nussbaum function is used to deal with the unknown control direction. In addition, the strictly positive real (SPR) condition, the Razumikhin lemma, the frequency distributed model, and the Lyapunov method are utilized to derive the parameter adaptive laws and to perform the stability proof.
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Karthigaiselvan, K., i Rames Chandra Panda. "Implementation of MPC Strategy in Reactive Separation Techniques and Its Benefits: A Demonstration with Natural Gas Sweetening Process". W Model Predictive Control - Theory and Applications [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1001101.
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Model Predictive Control (MPC) is a widely used method that has numerous applications in process industries. In the MPC group of controllers, a clear model is used directly for predicting future plant behavior and calculating corrective control action required to maintain the output at the desired set point value. It is well known that most chemical processes present inherent nonlinearities on account of disturbance, set-point changes.MPC variants based on nonlinear process models have produced stiff control of process along with improved handling of constraints, abnormal dynamics and time delays. One of the variants EMPC applied for various chemical processes have produced economic performance index over the horizon for achieving optimal output targets. In addition to that, adaptive MPC is better in handling the nonlinearity and time varying characteristics during run time by modifying model. The control of reactive separation process is difficult on account of process nonlinearity and interactions of vapor-liquid equilibrium with chemical reactions. Reactive separation is multi -input and multi-output(MIMO) system .In order to obtain the optimal performance, energy conservation and cost effectiveness of MIMO system , the application of optimal controller is inevitable. The application of optimal controller have exhibited better performance compared to tuned linear controller inspite of presence of unknown input delays. The mpc coupled with neural network have exhibited better controllability in case of reactive distillation process. This chapter will cover recent developments in MPC applicable to reactive separation techniques that consist of reactive distillation, reactive absorption, extractive reaction, reactive membrane separation which are used in applications such as LPG processing, natural gas sweetening process etc
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Kornacka-Sareło, Katarzyna Anna. "Problem dyskryminacji kobiet wśród współczesnych chasydów dynastii "satmar"". W Kobiety wobec dominacji i opresji. Wydawnictwo Uniwersytetu Łódzkiego, 2019. http://dx.doi.org/10.18778/8142-431-8.05.
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Celem autorki artykułu było ukazanie problemu dyskryminacji kobiet wśród (współczesnych) chasydów dynastii satmar. Są oni jedną z najbardziej ultraortodoksyjnych grup w obrębie judaizmu. Chociaż żyją obecnie w Stanach Zjednoczonych, Izraelu oraz w niektórych państwach Europy Zachodniej, to zachowują się w taki sposób, jakby czas zatrzymał się w osiemnastym bądź dziewiętnastym stuleciu. Protestują przeciwko jakimkolwiek formom asymilacji, akulturacji czy integracji ze środowiskiem zewnętrznym. W konsekwencji kobiety pochodzące ze wspólnot satmar hasidim stają się pozbawione niemal wszelkich praw. Nie wolno im się uczyć i studiować: zakaz ten dotyczy nawet języków angielskiego i hebrajskiego. Są one także przedmiotem licznych działań opresyjnych ze strony mężczyzn. Działania te zostały ostatnio opisane przez byłą członkinię społeczności chasydów satmarskich, Deborę Feldman, która zdecydowała się na porzucenie wspólnoty i opowiedziała światu swoją historię. Jednakże opuszczenie tego typu grupy nie jest łatwe. Zdaniem autorki niniejszego artykułu Feldman pozostanie na zawsze Żydówką, choć nie przebywa już w otoczeniu Żydów. Innymi słowy, powróci do kodu kulturowego, który ukształtował jej tożsamość, mimo że zdobyła popularność, sławę oraz wykształcenie. Z drugiej natomiast strony głos Debory Feldman wydaje się bardzo ważny ze względu na przyszłe pokolenia kobiet wychowywanych w środowiskach ultraortodoksyjnych, dając owym kobietom nadzieję na zmianę usytuowania w strukturze społecznej. Kobiety te – również dzięki wspomnieniom Feldman – będą mogły uwierzyć we własną wartość, a także w możliwość zdobycia osobistej autonomii oraz podejmowania niezależnych decyzji: tych zwłaszcza, które dotyczą najbardziej intymnych sfer ludzkiej egzystencji.
Streszczenia konferencji na temat "Mimoza (Group)"
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Zhang, Qiaolun, Yizhou Yang, Alberto Gatto i Massimo Tornatore. "Resource Allocation in Optical Networks with Mode Group Division Multiplexing and Light Trail". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.tu2d.7.
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We quantitatively evaluate resource efficiency enabled by mode-group-division multiplexing (MGDM) and light-trail (LT) in optical metro networks. Combining MGDM with LT reduces 95% of MIMO complexity of Full-MIMO with only 11% additional spectrum occupation.
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Sato, Masaki, Manabu Arikawa, Hidemi Noguchi, Junichiro Matsui, Jun’ichi Abe i Emmanuel Le Taillandier de Gabory. "Inline Optical Compensation of Group Delay Ripple for Long-haul Transmission Using Offloaded 2×2 MIMO Filter". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.w3e.6.
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We demonstrated inline optical compensation of group delay ripple estimated with offloaded 2×2 MIMO filter for 84-GBaud PM-PCS-16QAM over 10,200 km SMF. We showed 38 % reduction of MIMO taps, compared to the conventional method.
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Jukic, Ante, Toon van Waterschoot, Timo Gerkmann i Simon Doclo. "Group sparsity for mimo speech dereverberation". W 2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA). IEEE, 2015. http://dx.doi.org/10.1109/waspaa.2015.7336927.
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Shrestha, Robin, i Jae Moung Kim. "Adaptive group loading for MIMO OFDM systems". W 2010 International Conference on Information and Communication Technology Convergence (ICTC). IEEE, 2010. http://dx.doi.org/10.1109/ictc.2010.5674723.
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Zhang, Xinyue, Zihao Fu, Yu Zhang, Fei Du, Xiongwen Zhao i Suiyan Geng. "Group-Based Antenna Selection for Massive MIMO". W 2021 13th International Symposium on Antennas, Propagation and EM Theory (ISAPE). IEEE, 2021. http://dx.doi.org/10.1109/isape54070.2021.9752801.
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Yang, Yuan, Junfeng Hu i Hailin Zhang. "Iterative Group MAP Detection in MIMO Wireless Systems". W 2007 IEEE 66th Vehicular Technology Conference. IEEE, 2007. http://dx.doi.org/10.1109/vetecf.2007.152.
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Li, Chi-Min, Jia-Chyi Wu, I.-Tseng Tang i Yu-Hong Huang. "A Group Sphere Decoder for the MIMO System". W 2009 International Conference on Communication Software and Networks. IEEE, 2009. http://dx.doi.org/10.1109/iccsn.2009.74.
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Koshy, John C., Joseph C. Liberti i Timothy R. Hoerning. "Iterative MIMO detector using a group-wise approach". W 2007 IEEE Sarnoff Symposium. IEEE, 2007. http://dx.doi.org/10.1109/sarnof.2007.4567359.
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Zeydan, Engin, i Ufuk Tureli. "Differential Space-Frequency Group Codes for MIMO-OFDM". W 2007 41st Annual Conference on Information Sciences and Systems. IEEE, 2007. http://dx.doi.org/10.1109/ciss.2007.4298366.
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Nguyen, Thanh-Binh, Minh-Tuan Le, Vu-Duc Ngo i Van-Giao Nguyen. "Parallel Group Detection Approach for Massive MIMO systems". W 2018 International Conference on Advanced Technologies for Communications (ATC). IEEE, 2018. http://dx.doi.org/10.1109/atc.2018.8587606.
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