94,573 research outputs found
Worst-case analysis for new online bin packing problems
Get PDFWe consider two new online bin packing problems, the online Variable Cost and Size Bin Packing Problem (o-VCSBPP) and the online Generalized Bin Packing Problem (o-GBPP). We take two well-known bin packing algorithms to address them, the First Fit (FF) and the Best Fit (BF). We show that both algorithms have an asymptotic worst-case ratio bound equal to 2 for the o-VCSBPP and this bound is tight. When there are enough bins of a particular type to load all items, FF and BF also have an absolute worst-case ratio bound equal to 2 for the o-VCSBPP, and this bound is also tight. In addition, we prove that no worst-case ratio bound of FF and BF can be computed for the o-GBPP. Therefore, we consider a natural evolution of these algorithms, the First Fit with Rejection and the Best Fit with Rejection, able to reject inconvenient bins at the end of the process. Similarly, we prove that no worst-case ratio of these algorithms can be computed for the o-GBPP. Finally, we give sucient conditions under which algorithms do not admit any performance ratio, and conclude that the worst-case results obtained for the o-VCSBPP and the o-GBPP also hold for the oine variant of these two problem
Epipsylla crotalariae Yang & Li 1984
No full textEpipsylla crotalariae Yang & Li, 1984; distribution: China (Yunnan); host: Crotalaria retusa L. (Fabaceae).Published as part of Li, Bin, Yang, Mao-Fa & Burckhardt, Daniel, 2015, Epipsylla millettiae sp. nov. (Hemiptera: Psylloidea), a new psyllid from China associated with Millettia pachyloba (Fabaceae) with comments on Epipsylla including the redescription of E. hainanana, pp. 135-143 in Zootaxa 3986 (1) on page 137, DOI: 10.11646/zootaxa.3986.1.8, http://zenodo.org/record/23248
Epipsylla liui Yang & Li 1983
No full textEpipsylla liui Yang & Li, 1983; distribution: China (Hainan); host unknown.Published as part of Li, Bin, Yang, Mao-Fa & Burckhardt, Daniel, 2015, Epipsylla millettiae sp. nov. (Hemiptera: Psylloidea), a new psyllid from China associated with Millettia pachyloba (Fabaceae) with comments on Epipsylla including the redescription of E. hainanana, pp. 135-143 in Zootaxa 3986 (1) on page 137, DOI: 10.11646/zootaxa.3986.1.8, http://zenodo.org/record/23248
Epipsylla nadana Yang & Li 1983
No full textEpipsylla nadana Yang & Li, 1983; distribution: China (Hainan); host: Pueraria montana (Lour.) Merr. (Fabaceae).Published as part of Li, Bin, Yang, Mao-Fa & Burckhardt, Daniel, 2015, Epipsylla millettiae sp. nov. (Hemiptera: Psylloidea), a new psyllid from China associated with Millettia pachyloba (Fabaceae) with comments on Epipsylla including the redescription of E. hainanana, pp. 135-143 in Zootaxa 3986 (1) on page 137, DOI: 10.11646/zootaxa.3986.1.8, http://zenodo.org/record/23248
Epipsylla guangxiana Yang & Li 1983
No full textEpipsylla guangxiana Yang & Li, 1983, = E. whitfordiodendritis Yang & Li, 1983, syn. nov.; distribution: China (Guangxi); host: Afgekia filipes (Dunn) R. Geesink (Fabaceae). E. guangxiana and E. whitfordiodendritis do not differ from each other morphologically and have been described from the same geographic region and same host species. For this reason, the two are synonymised.Published as part of Li, Bin, Yang, Mao-Fa & Burckhardt, Daniel, 2015, Epipsylla millettiae sp. nov. (Hemiptera: Psylloidea), a new psyllid from China associated with Millettia pachyloba (Fabaceae) with comments on Epipsylla including the redescription of E. hainanana, pp. 135-143 in Zootaxa 3986 (1) on page 137, DOI: 10.11646/zootaxa.3986.1.8, http://zenodo.org/record/23248
al-Musnad li al-Imam Ahmad bin Hanbal
No full textKitab ini menghimpun hadits. Dalam jilid pertama dibahas mengenai musnad Abu Bakar Shiddiq, Musnad Umar bin Khattab, musnad Ali bin Abi Thalib
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