Change and Relationship of Hematocrit and Electrocardiogram of the Crew in High Altitude Span Transportation

Objective： To investigate the effect of high altitude span transportation on the change of hematocrit and electrocardiogram of the crew in the plateau construction, and discuss their relationship. Method： By SPSS 11.0 statistical software, to treat hematocrit and electrocardiogram in the examination data of the the crew, who took part in the construction of Qinghai-Tibetan railway in 2003, before, during and after the construction. Then, we compared the data among the constructors in the fixed altitude during the same period. Result： The hematocrit of the crew slowly and continually rose to the maximum （p 〈 0.01 ） after the construction in the high altitude span during one construction year, and the abnormal rate of electrocardiogram obviously decreased（p 〈 0.05）. The abnormal rate of electrocardiogram apparently improved when hernatorit reached 52% among the range from 45.12% to 52.24%, and the correlation analysis showed that the electrocardiographic change was closely and negatively correlated with the hematocrit among the range of hematocrit（p 〈 0.05）. Conclusion： Although the higher-level stress state of the crew made the hematocrit in the blood continually increase in the long-teml high altitude span construction, the hematocrit reached the more reasonable hematocrit compensation and made it the optimum state of Hct in the end. As a result, the perfusion of tissues and organs was improved. The abnormal rate of electrocardiogram apparently improved because the oxygen delivery of the myocardium reached the optimum compensation.     

Fe-based amorphous coating prepared using high-velocity oxygen fuel and its corrosion behavior in static lead–bismuth eutectic alloy

The Fe_49.7Cr₁₈Mn_1.9Mo_7.4W_1.6B_15.2C_3.8Si₂ amorphous coating was deposited on T91 steel substrate by using the high-velocity oxygen fuel(HVOF) spray technique to enhance the corrosion resistance of T91 stainless steel in liquid lead–bismuth eutectic(LBE). The corrosion behavior of the T91 steel and coating exposed to oxygen-saturated LBE at 400°C for 500 h was investigated. Results showed that the T91substrate ...     

Kinetic analysis of iron ore powder reaction with hydrogen–carbon monoxide

Iron ore powder was isothermally reduced at 1023–1373 Kwith hydrogen/carbon monoxide gas mixture (from 0vol%H₂/100vol% CO to 100vol%H₂/0vol%CO). Results indicated that the whole reduction process could be divided into two parts that proceed in series. The first part represents a double-step reduction (Fe₂O₃→Fe₃O₄→FeO), in which the kinetic condition is more feasible compared with that in the second part representing a single-step ...     

An algorithm based on evidence theory and fuzzy entropy to defend against SSDF

In cognitive radio networks, spectrum sensing is one of the most important functions to identify available spectrum for improving the spectrum utilization. Due to the open characteristic of the wireless electromagnetic environment, the wireless network is vulnerable to be attacked by malicious users(MUs), and spectrum sensing data falsification(SSDF) attack is one of the most harmful attacks on spectrum sensing performance. In this article,an algorithm based on the evidence theory and fuzzy entr...     

Phylogenetic relationship and morphological evolution in the subfamily Limenitidinae （Lepidoptera： Nymphalidae）

The mitochondrial cytochrome oxidase subunit I （CO1） gene and the nuclear elongation factor 1 α（EF-1α） gene were sequenced from 29 species of Nymphalidae （Nymphalidae, Lepidoptera）. Phylogenetic trees were constructed based on the sequences determined from the 29 species and sequences of other 36 species deposited in GenBank using the neighbor-joining （NJ）, maximum likelihood （ML） and Bayesian methods with Libythea celtis （Libytheinae） as the outgroup. Our phylogenetic trees indicated four major clades. Clade A includes three subfamilies： Apaturinae, Nymphalinae, and Limenitidinae, excluding the tribe Limenitidini; Clade B includes the subfamilies Heliconiinae and the tribe Limenitidini; Clade C includes Satyrinae, Calinaginae, Charaxinae and Morphinae; and Clade D includes subfamily Danainae. Our study suggested that the tribes Pseudergolini, Biblidini, Limenitidini and Cyrestidini should be considered as subfamilies and confirmed the interspecific relationships within the subfamily Pseudergolinae, namely Amnosia ＋（Pseudergolis ＋ （Stibochiona ＋ Dichorragia））. We then mapped three morphological characters （spot of anal angle, eyespots, and process from outer margin of hind wing） onto the phylogenetic tree constructed by ML analysis using the combined sequence data. Based on this the evolutionary patterns of these morphological characters were identified, they indicated that the three characters evolved repeatedly in the family Nymphalidae.     

Relations between structural properties and synchronizability on local world dynamical networks

In this paper, the effects of various structural properties on the synchronization of coupled oscillators with local-world coupling configurations are investigated. It is found that for local world networks, the larger heterogeneity of the degree distribution, the enhanced interconnection of nodes, and the increased clustering do not improve the synchronizability of dynamical systems. On the contrary, the increase of the maximum betweenness centrality appears to be responsible for the decrease of the synchronizability.     

Irregular and regular LDPC codes with high spectrum efficiency modulation in image transmission over fading channel

1.INTRODUCTION Low densityparity check(LDPC)codes,firstintroduced byGallagerin1963,havenearShannonlimitperformance whendecodedusinganiterativeprobabilisticalgorithm[1,2]. Lubyetal,constructedirregularLDPCcodesandshowed thatirregularcodesperformedbetterthanregularones[3]. AndthenRichardsonandUrbankedevelopedadensityevo lutionalgorithmtoanalyze,designtheirregularLDPC codes[4].Bythismethod,theyconstructedtheLDPCcodes thatclearlybeatthepowerfulTURBOcodes[5]. Ontheotherhand,wirele…     

Perfectly matched layer implementation for ADI-FDTD in dispersive media

1.INTRODUCTIONThe finite difference time domain(FDTD)method iswidely used for solving electromagnetic problems[1].The Courant stability condition must be satisfiedwhen the method is used.Alternating direction i m-plicit finite difference ti me domain(ADI-FDTD)method proposed by Namiki is based on the alternat-ing direction i mplicit technique and is applied toYee’s cell to solve Maxwell’s equations[2,3].Thisscheme is unconditionally stable and is not dissipa-tive.Therefore,the ti …     

Mechanism and Modeling for Polymerization of Acrylamide in Inverse Microemulsions

After discussion on the mechanism of polymer particle nucleation and growth in inverse microemulsion polymerization, a schematic physical model for polymerization of acrylamide in inverse microemulsions was presented. Furthermore, several key problems in mathematically modeling of inverse microemulsion polymerization were pointed out.