用开关电容实现Hopfield网络的一种新方法

提出了利用开关电容网络实现连续的Ｈｏｐｆｉｅｌｄ神经网络的一种新方法，它便于单片集成，实现的网络结构具有对寄生参数不灵敏的优点     

Laboratory studies of a tettigoniid (Insecta: Orthoptera) Ruspolia differens (Serville): colour polymorphism

The occurrence of the siphonostomatoid copepod, Sphaeronella leuckartii Salensky, in the marsupium of the amphipod Aora gracilis (Bate) was studied in Lough Hyne, south-west Ireland. A maximum of 12·9% of A. gracilis females were infected in any monthly sample derived from the sponges Halichondria panicea (Pallas) and Hymeniacidon perleve (Montagu), but up to 42·9% per month from plastic-mesh substrata. The parasitism of Amphipoda by Sphaeronella species is reviewed.     

Description and female genital structures of a new species of the demersal calanoid copepod Ridgewayia from southern Japan

A new species of the demersal calanoid copepod Ridgewayia, R. boxshalli n.sp., is described from southern Japan. This is the first record of the genus in Japan. It is distinguishable from other congeners by the antennule and leg 5 of both sexes. In order to identify evolutionary trends, detailed observations were also carried out on the female genital structures using light and scanning electron microscopy for comparison with other calanoids. Their organization is characterized by two egg-laying ducts opening through paired gonopores into a small cavity, the genital atrium, covered by a genital operculum and opening to the outside through a distal atrial slit. No seminal receptacle is present. The unique morphological features and in situ feeding habit of Ridgewayia are also noted.     

A review of Paranannopidae (Copepoda: Harpacticoida) with claviform aesthetascs on oral appendages

Leptotachidia iberica Becker is completely redescribed from the type material and is shown to carry claviform aesthetascs on the mouthparts. This is regarded as a character of high phylogenetic significance and, together with the loss of the mandibular exopod and the form of sexual dimorphism of the distal segment of the male P2 endopod, provides overwhelming evidence for a common ancestry for the genera Leptotachidia, Micropsammis Mielke and Paradanielssenia Soyer. Additional observations are made of the morphology of M. noodti Mielke, M. secunda Mielke and P. biclavata Gee. From a discussion of the probable relationships within this group of genera it is concluded that M. secunda is the most likely sister group of Leptotachidia and therefore must be removed to a new genus Telopsammis gen. nov. New diagnoses are given for all the genera.     

Copepoda associated with scleractinian corals on the Great Barrier Reef,northeastern Australia,with a key to the genera of the Lichomolgidae

Nine new species and three new genera, Parandrianellus, Scyphuliger, and James-cookina, are associated with various species of hard corals in the vicinity of Lizard Island, Big Broadhurst Reef, and Bowl Reef on the Great Barrier Reef. These copepods include the lichomolgids Parandrianellus annulatus from Hydnophora rigida, Scyphuliger concavipes from Acropora hyacinthus and Acropora sarmentosa, Scyphuliger manifestus from Acropora hyacinthus and Acropora squarrosa, James-cookina redacta from Echinopora horrida, Panjakus eumeces from Hydnophora rigida, Anchimolgus abbreviatus and Anchimolgus tanaus from Acrhelia horrescens, Anchimolgus exsertus from Echinopora horrida, and Odontomolgus bulbalis from Merulina ampliata. Schedomolgus tenuatus Humes, 1990, recorded from Acropora hyacinthus and Acropora humilis, is transferred to the genus Scyphuliger. Schedomolgus lobophorus (Humes and Ho, 1968) is recorded from Acropora hyacinthus, Acropora humilis, Acropora sarmentosa, and Acropora intermedia; Amarda goniastreae Humes, 1985, from Favia stelligera; and Amardopsis merulinae Humes, 1974, from Merulina ampliata and Leptoria phrygia. The harpacticoid Alteuthellopsis corallina Humes, 1981, is reported from Merulina ampliata and Stylophora pistillata. A list of those copepods previously known to be associated with hard corals in the area and a key to the 81 genera of the Lichomolgidae are provided.     

Copepods of the family Ergasilidae (Poecilostomatoida) parasitic on coastal fishes of Kerala,India

Six species of ergasilid copepods are described, based on material found on 11 species of fishes collected from estuaries and rivers in Kerala, India. Five are new to science, they are: Dermoergasilus varicoleus n. sp. from Liza tade Forskål; Ergasilus parvitergum n. sp. from Etroplus suratensis (Bloch) and Caranx malabaricus (Bloch and Schneider); Ergasilus rostralis n. sp. from Liza tade, L. macrolepis (Smith), and Valamugil seheli (Forskål); Ergasilus uniseriatus n. sp. from Glossogobius giuris (Hamilton) and Xenentodon cancila Hamilton; and Paraergasilus dentatus n. sp. from Glossogobius giuris. Dermoergasilus amplectens (Dogiel and Akhmerov) was recovered in India from six species of hosts: Etroplus maculatus (Bloch), Gerres setifer (Hamilton), Hyporamphus xanthopterus (Cuvier and Valenciennes), Megalops cyprinoides (Broussonet), Valamugil seheli (Forskål), and Chanos chanos (Forskål).     

The non-marine Crustacea of Antarctica and the Islands of the Southern Ocean: biodiversity and biogeography

A total of 101 verified species and eight ordinal taxa represent the non-marine Crustacea on Antarctica and the islands of the Southern Ocean. The largely terrestrial Isopoda and Amphipoda are confined to some sub-Antarctic and cool temperate islands while the predominantly freshwater Anostraca, Anomopoda, Copepoda (=Calanoida, Cyclopoida, Harpacticoida) and Ostracoda (Podocopida) occur throughout the region. Holocene sea-level rises fragmented freshwater and terrestrial species ranges on New Zealand, Auckland, Campbell, and possibly other South Pacific islands, leaving a legacy of vicariant taxa. Tertiary species probably survived Pleistocene glaciation in aquatic refugia on the New Zealand/South Pacific, Falkland, Crozet and Kerguelen archipelagoes, but there are no valid records of Tertiary Antarctic Crustacea. All 40 Continental and Maritime Antarctic freshwater records can be ascribed to the historic introduction of anthropogenic aliens, Holocene immigration of colonists, returning re-colonists and marine species 'marooned' in epishelf and other coastal lakes.     

II.—A synoptic revision of the Tanyrrhynchinæ (Curculionidæ)

This paper describes two new earthworm species, Iridodrilus codonothecoformis sp. n. and Iridodrilus condylopapillaris sp. n. and illustrates the major diagnostic features of, and the differences between, Iridodrilus roseus Beddard, 1897 and Heliodrilus lagosensis Beddard, 1890. Hitherto unnoticed features of I. roseus are also illustrated, namely that it possesses a bursa copulatrix and that two pairs of very tiny penial setae in sacs occasionally occur which penetrate the bursa copulatrix. It is also demonstrated that the structures hitherto regarded as a ‘coelomic duct’ that supposedly links the two fertilization chambers is in fact a pair of ovarian ducts that lead from the paired ovaries to the chambers; these ducts are not interlinked. It is further argued that neither Iridodrilus roseus nor Heliodrilus lagosensis can be regarded as having a spermathecal system that is paired internally. The implications of these findings are discussed in relation to the taxonomy of the two named genera. It is recommended that Iridodrilus and Heliodrilus be regarded as valid genera s.s. Beddard, though with modified diagnoses.