TMEIC热轧带钢生产线自动化系统特点

介绍了TMEIC常规热连轧带钢生产线的工艺特点以及其电气传动系统、基础自动化系统(L1)以及过程控制系统(L2)的实现方法及实际应用效果,着重说明了该公司自动化控制系统所具有的新技术和新特点。     

薄板坯连铸连轧生产线的基础自动化控制系统

从薄板坯连铸连轧生产线中基础自动化计算机系统的应用角度,对计算机控制系统的网络结构、硬件构成及完成的主要控制功能进行了详细说明.在SIEMENS公司的SINEC H1网、SIMANDAY D系统、S7-400可编程序控制器等进行了介绍.     

马钢2250热轧带钢生产线电气自动化控制新特点

介绍了马钢2250常规热连轧带钢生产线的工艺特点以及其电气传动系统、基础自动化系统（L1）以及过程控制系统（12）的实现方法及实际应用效果,着重说明了该生产线自动化控制系统所具有的新技术、新特点。     

珠钢CSP生产线自动化及检测控制系统

介绍CSP的自动化系统,并讨论检测和控制技术在CSP生产线的应用.     

攀钢轨梁厂万能轧机生产线自动化系统组建思路

介绍了攀钢轨梁厂万能轧线生产工艺，对万能轧线自动化系统的构成提出思路。     

基于FX2N PLC的工件机械手搬运系统设计

根据MPS柔性生产系统中工件机械手搬运系统的控制要求,以三菱FX2N为智能控制器,结合传感器技术、气压传动技术和PLC控制技术,设计了一种应用于工业场合自动化生产线的工件机械手搬运系统。完成了系统硬件和软件的设计,该系统能够实现将工件从供料工位搬运至下一个加工位置。     

近期热轧带钢生产线工艺需求及改造

正中国钢铁在经过"产能最大化"的追求后,在产能过剩以及国家调控等多重压力下,各热轧带钢生产线为了突破市场压力以及提高核心竞争力,纷纷规划或者实行了系统改造。本文基于东芝三菱电机工业系统(中国)有限公司(以下简称TMEIC)对热轧带钢生产线工艺改造的经验,详细介绍了热轧带钢生产线工艺提升的种种需求及其原因,以及TMEIC控制系统为了满足这些需求在工艺设备、产品规格、工艺过程控制上所提供的解决对策,最后通过典型改造案例阐述了需求兑现的现状,并展望了中国热轧带钢在这一轮工艺技术期望达到要求后,下一轮的核心竞争力的技术方向所在。     

立式连铸机L1和L2的接口技术

文章主要介绍了基础自动化级L1和过程自动化级L2间的接口技术。设计的数据通讯方式实现了二级工程师站对一级自动化系统的管理。     

板坯连铸机基础自动化系统配置的研究

为提升板坯连铸机基础自动化系统(L1)的水平,对宝钢和沙钢引进的板坯连铸机的配置进行了比对,对两者的工厂设计、设备设计、技术附件、I/O清单等进行了分析,并指出两者设计理念和制造技术的相似性,提出了具有普适性的板坯连铸机L1的系统架构、网络构成、L1分层分区与功能模块化的配置清单。     

带钢热连轧生产线自动控制系统

以凌钢热连轧生产线自动控制系统为例,论述了热连轧生产线基础自动控制系统的基本结构、硬件软件配置,控制功能,系统测试和现场调试等内容,同时也指出了该自动化系统坦 步改造的要点。     

Isolation of eukaryotic ribosomal proteins. Purification and characterization of 60 S ribosomal subunit proteins L3, L6, L7', L8, L10, L15, L17, L18, L19, L23', L25, L27', L28, L29, L31, L32, L34, L35, L36, L36', and L37'

The proteins of the large subunit of rat liver ribosomes were separated into seven groups by stepwise elution from carboxymethylcellulose with LiCl at pH 6.5. Twenty-one proteins (L3, L6, L7', L8, L10, L15, L17, L18, L19, L23', L25, L27', L28, L29, L31, L32, L34, L35, L36, L36', and L37') were isolated from three groups (C60, E60, and F60) by ion exchange chromatography on carboxymethycellulose and by filtration through Sephadex. The amount of protein obtained varied from 0.3 to 25 mg. Nine of the proteins (L6, L8, L18, L27', L28, L29, L34, L36, and L36') had no detectable contamination: the impurities in the others were no greater than 9%. The molecular weight of the proteins was estimated by polyacrylamide gel electrophoresis in sodium dodecyl sulfate; the amino acid composition was determined.     

Early first-language reading and spelling skills predict later second-language reading and spelling skills.

This prospective study examined early first-language (L1) predictors of later second-language (L2) reading (word decoding, comprehension) and spelling skills by conducting a series of multiple regressions. Measures of L1 word decoding, spelling, reading comprehension, phonological awareness, receptive vocabulary, and listening comprehension administered in the 1st through 5th grades were used as predictors of L2 reading (word decoding, comprehension) and spelling skills in high school. The best predictor of L2 decoding skill was a measure of L1 decoding, and the best predictors of L2 spelling were L1 spelling and L1 phonological awareness. The best predictor of L2 reading comprehension was a measure of L1 reading comprehension. When L2 word decoding skill replaced L1 word decoding as a predictor variable for L2 reading comprehension, results showed that L2 word decoding was an important predictor of L2 reading comprehension. The findings suggest that even several years after students learn to read and spell their L1, word decoding, spelling, and reading comprehension skills transfer from L1 to L2. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Linguistic Knowledge, Processing Speed, and Metacognitive Knowledge in First- and Second-Language Reading Comprehension: A Componential Analysis.

The authors report results of a study into the role of components of first-language (L1; Dutch) and second-language (L2; English) reading comprehension. Differences in the contributions of components of L1 and L2 reading comprehension are analyzed, in particular processing speed in L1 and L2. Findings indicate that regression weights of the L1 and L2 components are different. Although correlations between most processing speed components and reading comprehension are substantial, there are no unique contributions to the explanation of either L1 or L2 reading comprehension when linguistic and metacognitive knowledge are accounted for. In addition, L1 reading comprehension is shown to have a large contribution to L2 reading comprehension, supporting theories of L1-L2 transfer of reading skills. Results are discussed from a developmental perspective. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Activities of nucleoprotein particles derived from rat liver ribosome

80-S ribosomes and 60-S subunits from rat liver were treated at increasing KC1 concentrations giving protein-deficient ribosomal particles whose components were analyzed and their activity tested. Most of the activities assayed stand treatment up to KC1 concentrations of around 0.6 M; peptidyl transferase, measured by the fragment reaction, however was 50% inhibited by 0.5 M KC1 in 60-S subunits but not in 80-S ribosomes. Three proteins, L21, L26 and L31, might be implicated in this loss of activity. 60-S subunits forming part of the 80 S ribosome are more resistant to the salt treatment and the pattern of proteins released by the treatment differs from the one obtained from free 60-S subunits, implying perhaps a change of conformation of this subunit upon association to form 80-S couples. According to their resistance to release by KC1 the proteins of the large sub-unit can be divided into three groups: (1) easily removed, including proteins: L1, L11, L17 and L25 in 80-s subunits and in addition, L5, L8, L9, L13, L20, L22, L26, L29, L31 and L32/33 in 60-S subunits; (2) proteins resistant to release by high salt concentrations in 80-S ribosomes as well as in 60-S subunits, namely proteins L3, L14, L27, L36, L40, L41, X1 and X2; (3) the rest of the proteins which are released in a more or less continuous way throughout the treatment. 5 S RNA is not released by KC1 treatment at the concentrations used. The binding sites for the antibiotics trichodermin and anisomycin are affected in a different way by the salt treatment, indicating that they are structurally different.     

mRNA instability elements in the human papillomavirus type 16 L2 coding region

Human papillomavirus capsid proteins L1 and L2 are detected only in terminally differentiated cells, indicating that expression of the L1 and L2 genes is blocked in dividing cells. The results presented here establish that the human papillomavirus type 16 L2 coding region contains cis-acting inhibitory sequences. When placed downstream of a reporter gene, the human papillomavirus type 16 L2 sequence reduced both mRNA and protein levels in an orientation-dependent manner. Deletion analysis revealed that the L2 sequence contains two cis-acting inhibitory RNA regions. We identified an inhibitory region in the 5'-most 845 nucleotides of L2 that acted by reducing cytoplasmic mRNA stability and a second, weaker inhibitory region in the 3' end of L2. In contrast, human papillomavirus type 1 L1 and L2 genes did not encode strong inhibitory sequences. This result is consistent with observations of high virus production in human papillomavirus type 1-infected tissue, whereas only low levels of human papillomavirus type 16 virions are detectable in infected epithelium. The presence of inhibitory sequences in the L1 and L2 mRNAs may aid the virus in avoiding the host immunosurveillance and in establishing persistent infections.     

L5 root compression caused by degenerative spinal stenosis of the L1-L2 and L2-L3 spaces

STUDY DESIGN: A severe bilateral L5 root lesion associated with spinal stenosis at L1-L2 and L2-L3 is described. OBJECTIVE: To describe clinical findings and the difficulty in obtaining a correct diagnosis of L5 Root Compression. SUMMARY OF BACKGROUND DATA: The disorder reported in this study has not been reported previously. Only one similar case has been described in the literature: an L5 root compression at L1-L2 caused by disc herniation. METHODS: Diagnosis was obtained by using computed tomography scanning, magnetic resonance imaging, and computed tomography myelography. The findings at L5-S1 were minimal to justify the patient's clinical symptoms, but a detailed study of the upper levels revealed spinal stenosis at L1-L2 and L2-L3, which could have been causing L5 and S1 root compression. A decompressive laminectomy and partial facetectomy in both levels were performed. RESULTS: The patient's pain and claudication disappeared, and clinical symptoms associated with the right L5 root improved. The left L5 root deficit remained stable. CONCLUSION: An unusual case of L5 root compression caused by degenerative stenosis of L1-L2 and L2-L3 is described.     

Recombinations of subunits of Phaseolus vulgaris isolectins

Phaseolus vulgaris phytohemagglutinin is formed in vivo by the combination of erythrocyte (E)-reactive and lymphocyte (L)-reactive subunits into five tetrameric isolectins:L4,L3E1, L2E2, L1E3, and E4. Evidence for phytohemagglutinin subunit structure is obtained by in vitro dissociation of native isolectins in 6 M guanidine HCl followed by removal of dissociating agents to allow subunit recombination. Dissociation and recombination of L4 yielded a single protein, electrophoretically indistinguishable from the native L4. Similar treatment of E4 also yielded a single protein indistinguishable from native E4. Treatment of L3E1, L2E2, L1E3, or a mixture of L4 and E4, yielded five distinct proteins electrophoretically similar to all five native phytohemagglutinin isolectins. Milligram quantities of all five recombinant isolectins were prepared either from L2E2 or a mixture of L4 and L1E3 proportioned to yield equimolar quantitives of the two subunits on dissociation. The recombinant isolectins were purified by affinity and SP-Sephadex ion exchange chromatography. Electrophoretic and chromatographic properties and the erythroagglutinating and mitogenic activities of recombinant isolectins were essentially identical with the native isolectins. The inclusion of 125I-labeled L4 in the dissociation results in a distribution of 125I-labeled L subunit among the purified recombinant isolectins proportional to their proposed subunit structures.     

Factors related to English reading performance in children with Chinese as a first language: More evidence of cross-language transfer of phonological processing.

Parallel measures of phonological, syntactic, and orthographic processing skill and reading were administered in English and in Chinese to 65 children whose 1st language (L1) was Cantonese and whose 2nd language (L2) was English. Phonological skill was correlated across L1 and L2. Phonological skill in both L1 and L2 was correlated with L2 reading and contributed a unique variance to L2 reading, even though the children's L1 was not written in an alphabetic orthography, whereas the 2nd language had an alphabetic orthography. This research adds to a growing body of evidence for cross-language transfer of phonological processing in L2 learning of English-as-a-Second-Language students. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Morphological and morphometric study of crustacean parasites within the genus Lernaeocera

Two species of Lernaeocera are present in the southeastern North Sea. Lernaeocera lusci infects bib Trisopterus luscus, dragonet Callionymus lyra and sand goby Pomatoschistus minutas. L. minuta is a junior synonym of L. lusci. The second valid species, L. branchialis, infects whiting Merlangius merlangus. The two species can be morphologically separated by the antennary processes, which are present in L. lusci and absent in L. branchialis. Discriminant functions allow complete separation between L. lusci and L. branchialis. There is high intraspecific, host-dependent variability within L. lusci. Length of L. lusci is significantly influenced by host size, and body form is influenced by the site of attachment of L. lusci on at least one host (bib). It is suggested that L. lusci consists of 3 forms: f. lusci, f. minuta and f. lyra.     

Elevated neointimal endothelin-1 in transplantation-associated arteriosclerosis of renal allograft recipients

The cell adhesion molecule L1 plays an important role in neural development, and mutations in human L1 have been implicated in X-linked hydrocephalus and related neurological diseases. We have previously demonstrated that recombinant proteins containing the second immunoglobulin-like domain (Ig2) of L1 contain both homophilic binding and neuritogenic activities. In this report, the involvement of L1 Ig2 in cell-cell adhesion and neuritogenesis was further evaluated in cell transfection studies. Transfectants expressing intact L1 were capable of undergoing L1-dependent self-aggregation and promoting neurite outgrowth from neural retinal cells. However, both activities were abolished in transfectants expressing L1delta2, a mutant L1 with Ig2 deleted. In competition experiments, the wild-type Ig2 fusion protein inhibited L1-dependent cell aggregation, whereas an Ig2 fusion protein containing the hydrocephalus mutation R184Q did not. Oligopeptides flanking Arg184 were therefore synthesized and assayed for their effects on L1-mediated cell-cell binding and neuritogenesis. The peptide L1-A, spanning the residues His178 and Gly191, inhibited both L1- and Ig2 fusion protein-mediated homophilic binding. When neural retinal cells were cultured on substrate-coated Ig2 fusion protein, peptide L1-A also abolished L1-dependent neurite outgrowth. Substitutions of several charged residues and hydrophobic residues with alanine in peptide analogues led to the loss of inhibitory effects, suggesting that multiple amino acids might be involved in L1-L1 binding. Taken together, these results identify an L1 homophilic binding site within the sequence HIKQDERVTMGQNG of Ig2 and demonstrate the requirement of L1 homophilic binding in the promotion of neurite outgrowth.