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  • 1
    facet.materialart.
    Unknown
    Beijing : Science Press
    Pages: In 3 Bd.
    Language: Chinese
    Note: Titel und Text in chines. Schr. , Nomenclature also in Latin.
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  • 2
    Monograph available for loan
    Monograph available for loan
    Beijing : Science Press
    Associated volumes
    Call number: AWI Bio-18-91560-1
    In: Flora in desertis Reipublicae Populorum Sinarum, Tomus 1
    Type of Medium: Monograph available for loan
    Pages: IV, 546 S , Ill., Kt
    Language: Chinese , Latin
    Note: Contents: GYMNOSPERMAE. - Pinaceae. - 1. Pinus L. - 2. Picea Dietr. - Cupressaceae. - 1. Platycladus Spach. - 2. Sabina Mill. - 3. Juniperus L. - Ephedraceae. - 1. Ephedra L. - ANGIOSPERMAE / MONOCOTYLEDONEAE. - Typhaceae. - 1. Typha L. - Sparganiaceae. - Sparganium L. - Potamogetonaceae. - 1. Potamogeton L. - 2. Zannichellia L. - Juncaginaceae (Scheuchzeriaceae). - 1. Triglochin L. - Alismataceae. - 1. Alisma L. - 2. Sagittaria L. - Butomaceae. - 1. Butomus L. - Gramineae. - I. Festuceae. - 1. Enneapogon Desv. ex Beauv. (Pappophorum Schreb.). - 2. Phragmites Trin. - 3. Cleistogenes Keng (Keniga Pack.). - 4. Diarrhena Beauv. - 5. Catabrosa Beauv. - 6. Eragrostis Beauv. - 7. Aeluropus Trin. - 8. Bromus L. - 9. Melica L. - 10. Poa L. - 11. Festuca L. - 12. Schismus Beauv. - 13. Puccinellia Parl. - II. Hordeeae. - 14. Psathyrostchys Nevski. - 15. Hordeum. - 16. Clinelymus Nevski (Elymus L.). - 17. Leymus Hoch. (Aneurolepidium Nevski). - 18. Lolium L. - 19. Roegneria C. Koch. - 20. Elytrigia Desv. - 21. Agropyron Gaertn. - 22. Eremopyrum Jaub. et Spach. - III. Chlorideae Kunth. - 23. Beckmannia Host. - 24. Chloris Swartz. - 25. Cynodon Rich. - IV. Avenae. - 26. Koeleria Pers. - 27. Avena L. - V. Agrostideae. - 28. Crypsis Ait. - 29. Alopecurus L. - 30. Polypogon Desf. - 31. Calamagrostis Adans. (Incl. Deyexia). - 32. Agrostis L. - 33. Psammochloa Hitchc. - 34. Timouria Roshev. - 35. Stephanachne Keng (Pappogrostis Roshev). - 36. Aristida L. - 37. Stipa L. - 38. Achnatherum Beauv. - 39. Ptilagrostis Griseb. - VI. Phalarideae. - 40. Hierochloë R. Br. - VII. Oryzeae. - 41. Zizania L. - VIII. Paniceae. - 42. Setaria Beauv. - 43. Pennisetum Rich. - 44. Digitaria Scop. - 45. Echinochloa Beauv. - IX. Arundinelleae. - 46. Arundinella Raddi. - X. Zoysieae. - 47. Tragus Hall. - XI. Andropogoneae. - 48. Miscanthus Anderss. - 49. Imperata Cyrillo. - 50. Spodiopogon Trin. - 51. Erianthus Michx. - 52. Hemarthria B. Br. - 53. Arthraxon Brauv. - 54. Bothriochloa O. Kuntze. - Cyperaceae. - 1. Bolboschoenus Palla. - 2. Scirpus L. - 3. Blysmus Panz. - 4. Eriophorum L. - 5. Heleocharis R. Br. - 6. Fimbristylis Vahl. - 7. Cyperus L. - 8. Juncellus (Griseb.) C. B. Clarke. - 9. Pycreus Beauv. - 10. Carex L. - 11. Kobresia Willd. - Araceae. - 1. Acorus L. - 2. Calla L. - 3. Arisaema Mart. - Lemnaceae. - 1. Lemna L. - 2. Spirodela Schleid. - Commelinaceae. - 1. Commelina L. - Pontederiaceae. - 1. Monochoria C. Presl. - Junaceae. - 1. Juncus L. - Liliaceae. - 1. Asparagus L. - 2. Allium L. - 3. Veratrum L. - 4. Lilium L. - 5. Gagea Salisb. - 6. Fritillaria L. - 7. Tulipa L. 8. Scilla L. - 9. Anemarrhena Bge. - 10. Eremurus M B. - 11. Hemerocallis L. - 12. Convallaria L. - 13. Disporum L. Salisb. ex D. Don. - 14. Polygonatum Mill. - Amaryillidaceae. - 1. Ixiolirion Fisch. - Iridaceae. - 1. Belamcanda Adams. - 2. Iris L. - Orchidaceae. - 1. Cypripedium L. - 2. Spiranthes Rich. - 3. Epipactis Zinn. - 4. Habenaria Willd. - 5. Coeloglossum C. Hartm. - 6. Orchis L. - DICTYLEDONAE. - Salicaceae. - 1. Populus L. - 2. Salix L. - Juglandaceae. - 1. Juglans L. - Ulmaceae. - 1. Ulmus L. - 2. Celtis L. - Moraceae. - 1. Ficus L. - 2. Morus L. - 3. Humulus L. - 4. Cannabis L. - Santalaceae. - 1. Thesium L. - Polygonaceae. - 1. Atraphaxis L. - 2. Calligonum L. - 3. Rumex L. - 4. Rheum L. - 5. Polygonum L. - Chenopodiaceae. - 1. Halocnemum M. B. - 2. Halostachys C. A. Mey. - 3. Anabasis L. - 4. Haloxylon Bge. - 5. Arthrophytum Schrenk. - 6. Ceratoides (Tourn.) Gagnebin; (Eurotia Adans.). - 7. Aellenia Ulbr. - 8. Salsola L. - 9. Kochia Roth. - 10. Camphorosma L. - 11. Sympegma Bge. - 12. Iljinia Korov. - 13. Kalidium Moq. - 14. Atriplex L. - 15. Nanophyton Less. - 16. Suaeda Forsk. ex Scop. - 17. Agriophyllum M. B. - 18. Corispermum L. - 19. Ceratocarpus L. - 20. Axyris L. - 21. Panderia Fisch. et Mey. - 22. Bassia All. (Echinopsilon Moq.). - 23. Londesia Fisch. et Mey. - 24. Kirilowia Bge. - 25. Chenopodium L. - 26. Salicornia L. - 27. Halopeplis Bge. ex Ung.-Sternb. - 28. Cornulaca Del. - 29. Halogeton C. A. Mey. - 30. Girgensohnia Bge. - 31. Haraninowia Fisch. et Mey. - 32. Borszczowia Bge. - 33. Halimocnemis C. A. Mey. - 34. Petrosimonia Bge. - Amaranthaceae. - 1. Amaranthus L. - Portulacaceae. - 1. Portulaca L. - Caryophyllaceae. - 1. Gymnocarpos Forsk. - 2. Spergularia (Pers.) J. et C. Presl. - 3. Lepyrodiclis Frenzl. - 4. Cerastium L. - 5. Stellaria L. - 6. Silene L. - 7. Melandrium Roehl. - 8. Lychnis L. - 9. Vaccaria Medic. - 10. Dianthus L. 11. Acanthophyllum C. A. Mey. - 12.Gypsophila L. - Nymphaeaceae. - 1. Nelumbo Adans. - 2. Nymphaea L. - Ceratophyllaceae. - 1. Ceratophyllum L. - Ranunculaceae. - 1. Clematis L. - 2. Adonis L. - 3. Ceratocephalus Moench. - 4. Halerpestes Greene. - 5. Ranunculus L. - 6. Batrachium (DC.) S. F. Gray. - 7. Thalictrum L. - 8. Anemone L. - 9. Pulsatilla Adans. - 10. Paeonia L. - 11. Caltha L. - 12. Leptopyrum Reichb. - 13. Aquilegia L. - 14. Delphinium L. - 15. Consolida (DC.) S. F. Gray. - Berberidaceae. - 1. Berberis L. - 2. Leontice L. - Menispermaceae. - 1. Menispermum L. - Addenda Diagnoses Taxorum Novarum. - Index. , Titel und Text in chines. Schr. , Nomenclature also in Latin.
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  • 3
    Call number: AWI Bio-18-91560-2
    In: Flora in desertis Reipublicae Populorum Sinarum, Tomus 2
    Type of Medium: Monograph available for loan
    Pages: III, 464 S. , Ill.
    Language: Chinese , Latin
    Note: Contents: Papaveraceae. - 1. Glaucium Mill. - 2. Papaver L. - 3. Hypecoum L. - 4. Corydalis Vent. - 5. Fumaria L. - Capparidaceae. - 1. Capparis L. - Cruciferae. - 1. Spirorrhynchus Kar. et Kir. - 2. Tauscheria Fisch. ex. DC. - 3. Isatis L. - 4. Pachypterygium Bge. - 5. Pugionium Gaertn. - 6. Cardaria Desv. - 7. Litwinowia Woron. - 8. Goldbachia DC. - 9. Hymenolobus Nutt. ex Torr. et Gray. - 10. Thlaspi L. - 11. Lepidium L. - 12. Berteroa DC. - 13. Microstigma Trautv. - 14. Lachnoloma Bge. - 15. Euclidium R. Br. - 16. Alyssum L. - 17. Ptilotrichum C. A. Mey. - 18. Camelina Crantz. - 19. Draba L. - 20. Megacarpaea DC. - 21. Capsella Medic. - 22. Rorippa Scop. - 23. Diptychocarpus Trautv. - 24. Chorispora R. Br. ex DC. - 25. Thellungiella O E. Schluz. - 26. Conringia Heist. ex Fabr. - 27. Turritis L. - 28. Synstemon Botsch. - 29. Dontostemon Andrz. ex C. A. Mey. - 30. Dimorphostemon Kitag. - 31. Clausia Korn.-Tr. - 32. Sterigmostemum M. B. - 33. Leptaleum DC. - 34. Tetracme Bge. - 35. Matthiola R. Br. - 36. Erysimum L. - 37. Syrenia Andrz. ex Bess. - 38. Torularia O. E. Schulz. - 39. Malcolmia R. Br. - 40. Arabidopsis (DC.) Heynh. - 41. Sisymbrium L. - 42. Eruca Mill. - 43. Descurainia Webb et Berth. - Crassulaceae. - 1. Orostachys Fisch. - 2. Sedum L. - Saxifragaceae. - 1. Parnassia L. - 2. Ribes L. - Rosaceae. - I. Spiraeoideae Agardh. - 1. Spiraea L. - II. Maloideae Weber. - 1. Cotoneaster B. Ehrhart. - 2. Crataegus L. - 3. Pyrus L. - 4. Malus Mill. - 5. Cydonia Mill. - III. Rosoideae Focke. - 1. Rosa L. - 2. Potaninia Maxim. - 3. Agrimonia L. - 4. Sanguisorba L. - 5. Rubus L. - 6. Geum L. - 7. Fragaria L. - 8. Potentilla L. - 9. Comarum L. - 10. Sibbalida L. - 11. Chamaerhodos Bge. - IV. Prunoideae Focke. - 1. Prinsepia Royle. - 2. Prunus L. - Leguminosae. - I. Mimosoideae Taub. - 1. Albizzia Durazz. - II. Caesalpinioideae Taub. - 1. Gleditsia L. - III. Papilionatae Taub. - 1. Eremosparton Fisch. et Mey. - 2. Sophora L. - 3. Ammodendron Fisch. - 4. Ammopiptanthus Cheng f. - 5. Thermopsis R. Br. - 6. Oronis L. - 7. Crotalaria L. - 8. Alhagi Gagneb. - 9. Lotus L. - 10. Kummerowia Schindl. - 11. Lespedeza Michx. - 12. Campylotropis Bge. - 13. Glycine Willd. - 14. Trifolium L. - 15. Melilotus Adans. - 16. Trigonella L. - 17. Melissitus Medic. - 18. Medicago L. - 19. Halimodendron Fisch. - 20. Vicia L. - 21. Lathyrus L. - 22. Amorpha L. - 23. Indigofera L. - 24. Robinia L. - 25. Swainsonia Salisb. (Sphaerophysa DC.). - 26. Caragana Fabr. - 27. Calophaca Fisch. - 28. Chesneya Lindl. - 29. Glycyrrhiza L. - 30. Hedysarum L. - 31. Oxytropis DC. - 32. Astragalus L. - 33. Gueldenstaedtia Fisch. (Amblytropis Kitag.). - Geraniaceae. - 1. Erodium L'Herit. - 2. Geranium L. - 3. Bieberstenia Steph. ex. Fisch. - Linaceae. - 1. Linum L. - Zygophyllaceae. - 1. Nitraria L. - 2. Peganum L. - 3. Zygophyllum L. - 4. Tribulus L. - 5. Tetraena Maxim. - Rutaceae. - 1. Phellodendron Rupr. - 2. Haplophyllum Adr. Juss. - Simaroubaceae. - 1. Ailanthus Desf. - Polygalaceae. - 1. Polygala L. - Euphorbiaceae. - 1. Chrozophora Adr. Juss. - 2. Speranskia Baill. - 3. Securinega Comm. ex Adr. Juss. - 4. Euphorbia L. - Callitrichaceae. - 1. Callitriche L. - Anacardiaceae. - 1. Pistacia L. - Celastraceae. - 1. Euonymus L. - 2. Celastrus L. - Aceraceae. - 1. Acer L. - Sapindaceae. - 1. Xanthoceras Bge. - 2. Koelreuteria Laxm. - Rhamnaceae. - 1. Rhamnus L. - 2. Ziziphus Mill. - Vitaceae. - 1. Vitis L. - 2. Ampelopsis Michx. - Tiliaceae. - 1. Tilia L. - Malvaceae. - 1. Malva L. - 2. Althaea L. - 3. Hibiscus L. - Guttiferae. - 1. Hypericum L. - Frankeniaceae. - 1. Frankenia L. - Tamaricadeae. - 1. Reamuria L. (Hololachne Ehrenb.). - 2. Tamarix L. - 3. Myricaria Desv. - Cistaceae. - 1. Helianthemum Mill. - Violaceae. - 1. Viola L. - Thymelaeacaae. - 1. Diarthron Turcz. - 2. Stellera L. - 3. Wikstroemia Endl. - Elaeagnaceae. - 1. Elaeagnus L. - 2. Hippophaë L. - Lythraceae. - Lythrum L. - Trapaceae. - 1. Trapa L. - Onagraceae. - 1. Epilobium L. - Haloragaceae. - 1. Myriophyllum L. - Hippuridaceae. - Hippuris L. - Cynomoriaceae. - 1. Cynomorium L. - Umbelliferae. - 1. Daucus L. - 2. Foeniculum Mill. - 3. Bupleurum L. - 4. Sium L. - 5. Aegopodium L. - 6. Sphallerocarpus Bess. ex. DC. - 7. Heracleum L. - 8. Ferula L. - 9. Seseli L. - 10. Schumannia Kuntze. - 11. Libanotis Hill. - 12. Saposhnikovia Schisck. - 13. Cicuta L. - 14. Oenanthe L. - 15. Cenolophium Koch. - 16. Carum L. - 17. Cnidium Cuss. - 18. Soranthus Ledeb. - 19. Archangelica N. M. Wolf. - Addenda Diagnoses Taxorum Novarum. , Titel und Text in chines. Schr. , Nomenclature also in Latin.
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  • 4
    Monograph available for loan
    Monograph available for loan
    Beijing : Science Press
    Associated volumes
    Call number: AWI Bio-18-91560-3
    In: Flora in desertis Reipublicae Populorum Sinarum, Tomus 3
    Type of Medium: Monograph available for loan
    Pages: III, 508 S , Ill
    ISBN: 7030023471
    Language: Chinese , Latin
    Note: Contents: Primulaceae. - 1. Primula L. - 2. Androsace L. - 3. Glaux L. - 4. Lysimachia L. - Plumbaginaceae. - 1. Goniolimon Boiss. - 2. Limonium Mill. - Oleaceae. - 1. Fraxinus L. - Loganiaceae. - Buddleja L. - Gentianaceae. - 1. Centaurium Hill. - 2. Gentiana L. - 3. Nymphoides Seguier. - Apocynaceae. - 1. Apocynum L. - 2. Poacynum Baill. - Asclepiadaceae. - 1. Periploca L. - 2. Cynanchum L. - Convolvulaceae. - 1. Convovulus L. - 2. Calystegia R. Br. - 3. Cuscuta L. - Hydrophyllaceae. - 1. Phacelia Juss. - Boraginaceae. - 1. Rindera Pall. - 2. Heliotropium L. - 3. Messerschmidia L. ex Hebenstr. - 4. Symphytum L. - 5. Rochelia Reichb. - 6. Asperugo L. - 7. Gastrocotyle Bge. - 8. Nonea Medic. - 9. Lycopsis L. - 10. Heterocarpum DC. - 11. Cynoglossum L. - 12. Lappula V. Wolf. - 13. Stenosolenium Turcz. - 14. Trigonotis Stev. - 15. Lepechiniella M. Pop. - 16. Arnebia Forsk. - 17. Onosma L. - 18. Lithospermum L. - 19. Echium L. - Verbenaceae. - 1. Caryopteris Bge. - Labiatae. - 1. Amethystea L. - 2. Scutellaria L. - 3. Marrubium L. - 4. Lagopsis Bge. ex Benth. - 5. Schizonepeta (Benth.) Briq. - 6. Lallemantia Fisch. et Mey. - 7. Dracocephalum L. - 8. Nepeta L. - 9. Eremostachys Bge. - 10. Phlomis L. - 11. Leonurus L. - 12. Panzeria Moench. - 13. Lagochilus Bge. - 14. Stachys L. - 15. Charmaesphacos Schrenk. - 16. Salvia L. - 17. Clinopodium L. - 18. Ziziphora L. - 19. Hyssopus L. - 20. Thymus L. - 21. Mentha L. - 22. Lycopus L. - 23. Elsholtzia Willd. - 24. Plectranthus L'Her. - Solanaceae. - 1. Lycium L. - 2. Solanum L. - 3. Hyoscyamus L. - 4. Datura L. - Scrophulariaceae. - 1. Veronicastrum Heist. ex Farbic. - 2. Veronica L. - 3. Linaria Mill. - 4. Limosella L. - 5. Leptorhabdos Schrenk. - 6. Scrophularia L. - 7. Rehmannia Libosch. ex Fisch. et Mey. - 8. Dodartia L. - 9. Omphalothrix Maxim. - 10. Euphrasia L. - 11. Odontites Ludw. - 12. Pedicularis L. - 13. Cymbaria L. - 14. Siphonostegia Benth. - Bignoniaceae. - 1. Incarvillea Juss. - Orobanchiaceae. - 1. Orobanche L. - 2. Cistanche Hoffmg. et Link. - Lentibulariaceae. - 1. Utricularia L. - Plantaginaceae. - 1. Plantago L. - Rubiaceae. - 1. Microphysa Schrenk. - 2. Galium L. - 3. Rubia L. - 4. Leptodermis Wall. - Caprifoliaceae. - 1. Lonicera L. - 2. Viburnum L. - 3. Sambucus L. - Valerianaeceae. - 1. Patrinia Juss. - Dipsaceae. - 1. Scabiosa L. - Campanulaceae. - 1. Adenophora Fisch. - 2. Lobelia L. - Compositae. - I. Eupatorieae. - 1. Eupatorium L. - II. Asterae Cass. - 2. Heteropappus Less. - 3. Aster L. - 4. Asterothamnus Novopokr. - 5. Galatella Cass. - 6. Linosyris Cass. - 7. Arctogeron DC. - 8. Tripolium Nees. - 9. Brachyactis Ledeb. - 10. Erigeron L. - 11. Conyza L. - III. Heliantheae. - 12. Xanthium L. - 13. Siegesbeckia L. - 14. Bidens L. - IV. Anthemideae. - 15. Achillea l. - 16. Tripleuospermum Sch. Bip. - 17. Tanacetum L. - 18. Hippolytia Poljak. - 19. Cancrinia Kar. et Kir. - 20. Brachanthemum DC. - 21. Dendranthema (DC,) Des. Moul. - 22. Stilpnolepis Krasch. - 23. Ajania Poljak. - 24. Filifolium Kitam. - 25. Kaschgaria Poljak. - 26. Elachanthemum Ling et Y. R. Ling. - 27. Neopallasia Poljak. - 28. Artemisia L. - V. Senecioneae. - 29. Senecio L. - 30. Ligularia Cass. - VI. Inuleae. - 31. Karelinia Less. - 32. Filago L. - 33. Leontopodium R. Brown. - 34. Gnaphalium L. - 35. Helichrysum Mill. - 36. Inula L. - 37. Pulicaria Gaertn. - VII. Echinopsideae. - 38. Echinops L. - VIII. Cynareae. - 39. Carlina L. - 40. Tugarinovia Iljin. - 41. Arctium L. - 42. Acroptilon Cass. - 43. Cousinia Cass. - 44. Olgaea Iljin. - 45. Ancathia DC. - 46. Carduus L. - 47. Cirsium Mill. emend. Scop. - 48. Silybum Adans. - 49. Oligochaeta C. Koch. - 50. Saussurea DC. - 51. Pilostemon Iljin. - 52. Jurinea Cass. - 53. Onopordum L. - 54. Russowia C. Winkl. - 55. Plagiobasis Schrenk. - 56. Serratula L. - 57. Schischkinia Iljin. - 58. Chartolepis Cass. - 59. Stemmacantha Cass. - 60. Amberboa (Pers.) Less. - 61. Hyalea (DC.) Jaub. et Spach. - 62. Centaurea L. - 63. Carthamus L. - IX. Cichorieae. - 64. Cichorium L. - 65. Garhadiolus Jaub. et Spach. - 66. Koelpinia Pall. - 67. Heteracia Fisch. et Mev. - 68. Achyrophorus Adans. - 69. Picris L. - 70. Epilasia (Bge.) Benth. et Hook. - 71. Scorzonera L. - 72. Tragopogon L. - 73. Taraxacum Wigg. - 74. Paramicrophynchus Kirp. - 75. Sonchus L. - 76. Cephalorrhynchus Boiss. - 77. Lactuca L. - 78. Chondrilla L. - 79. Hexinia H. L. Yang, gen. nov. in Addenda. - 80. Hieracium L. - 81. Crepis L. - 82. Ixeris Cass. - 83. Youngia Cass. - Addenda Diagnoses Taxorum Novarum. , Titel und Text in chines. Schr. , Nomenclature also in Latin.
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  • 5
    Publication Date: 2017-09-06
    Description: l-Serine biosynthesis, a crucial metabolic process in most domains of life, is initiated by d-3-phosphoglycerate (d-3-PG) dehydrogenation, a thermodynamically unfavorable reaction catalyzed by d-3-PG dehydrogenase (SerA). d-2-Hydroxyglutarate (d-2-HG) is traditionally viewed as an abnormal metabolite associated with cancer and neurometabolic disorders. Here, we reveal that bacterial anabolism and catabolism of...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 6
    Publication Date: 2012-05-01
    Description: The Daixian rutile deposit is located in the Hengshan Mountains in the Trans-North China Orogen; it is considered to be one of the largest rutile deposits in China, with 6 million metric tons (Mt) of contained titanium. Most of the rutile ores are hosted in garnet-free anthophyllite gneiss with minor Mg hornblende, feldspar, quartz, phlogopite, rutile, zircon, and titanite. Rutile grains are euhedral, 0.02 to 0.50 mm in size, contain 98.649 to 99.784 wt % TiO2, and form chains, thin layers along the foliation, and dense aggregates. Rutiles are compositionally homogeneous and contain no detectable mineral inclusions except local ilmenite lamellae and zircon. Crystallization temperatures of the rutile are estimated at ~640°C at 0.7 GPa, and ~647°C without pressure calibration according to the Zr-in-rutile thermometer, recording amphibolite facies metamorphism of an intermediate P/T ratio series. Variations in Nb versus Cr in rutiles indicate a connection of the ores to mafic protolith; not a pelitic rock derived from aluminous sedimentary rocks. SIMS U-Pb analyses of rutiles from the deposit yield a mean 207Pb/207Pb age of 1780.2 ± 9.6 Ma. Considering the closure temperature (up to ~650°C), grain sizes and recrystallization of the rutile, this age is more likely to represent closure and/or recrystallization time rather than peak metamorphism period, so the rutile deposit formed not younger than ~1780 Ma. This unique garnet-free rutile deposit was metamorphosed from mafic rocks in amphibolite facies during the Paleoproterozoic or Archean, being distinct from any other metamorphic rutile deposits, such as the known eclogite-related types.
    Print ISSN: 0361-0128
    Topics: Geosciences
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  • 7
    Publication Date: 2018-02-24
    Description: Entropy, Vol. 20, Pages 144: Group Sparse Precoding for Cloud-RAN with Multiple User Antennas Entropy doi: 10.3390/e20020144 Authors: Zhiyang Liu Yingxin Zhao Hong Wu Shuxue Ding Cloud radio access network (C-RAN) has become a promising network architecture to support the massive data traffic in the next generation cellular networks. In a C-RAN, a massive number of low-cost remote antenna ports (RAPs) are connected to a single baseband unit (BBU) pool via high-speed low-latency fronthaul links, which enables efficient resource allocation and interference management. As the RAPs are geographically distributed, group sparse beamforming schemes attract extensive studies, where a subset of RAPs is assigned to be active and a high spectral efficiency can be achieved. However, most studies assume that each user is equipped with a single antenna. How to design the group sparse precoder for the multiple antenna users remains little understood, as it requires the joint optimization of the mutual coupling transmit and receive beamformers. This paper formulates an optimal joint RAP selection and precoding design problem in a C-RAN with multiple antennas at each user. Specifically, we assume a fixed transmit power constraint for each RAP, and investigate the optimal tradeoff between the sum rate and the number of active RAPs. Motivated by the compressive sensing theory, this paper formulates the group sparse precoding problem by inducing the ℓ 0 -norm as a penalty and then uses the reweighted ℓ 1 heuristic to find a solution. By adopting the idea of block diagonalization precoding, the problem can be formulated as a convex optimization, and an efficient algorithm is proposed based on its Lagrangian dual. Simulation results verify that our proposed algorithm can achieve almost the same sum rate as that obtained from an exhaustive search.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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    Publication Date: 2015-10-23
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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