Calendar on Composites

The following meetings may be of interest to researchers in the field ofcomposite materials.     

Study on Equipment Selective Maintenance Strategy Based on Performance

1 IntroductionWith the development of science and technology, machine equipments become more and more complex. In China, engineers have found many disadvantages in the conventional time preventable maintenance of machines [1]. The essential thought of the strategy of conventional time preventable maintenance is to eliminate equipment's faults in earlier time through examining and repairing completely at fixed intervals. The main maintenance method is to disassemble an equipment and maintain i…     

Research on a Diagnosis Method Based on a Correlation Integral

For the first fime,the diagnosis idea based on a correlation integral is proposed,which re-gards the correlation integral as a feature set.The correlation dimension is contained in the double-log curve of the correlation integral to scale,so extracting features directly from the correlation integral can avoid the bottleneck problem of determining the range of non-scale length.Several features extracted from the correlation integral are better than the single feature of the correlation dimension when descri-bing the signal.It is obvious that this method utilizes more information of the signal than does the cor-relation dimension.The diagnosis examples verify that this method is more accurate and more effective.     

Research on a Reliability Calculating Model Based on Wear Data

1IntroductionWCarisanimPortantfastorcausingproduct'sfaults.AnalyzingandresearchingthereliabilityofwearingproductSbyusingtheresearchresultsoffrichonandwearcaneffective1yincreaseaProduct'sreliability,deCreaseitsmaintenancecost,andbringsignificantecono1nicandsocialeffeChveness.BytheresearchonproductS'weardata,thispaPerstUdiesthemethodsandstePsofbuildingtheprobabilitymodelofweedngrulesandareliabilitymathematicaIcalculatingmodelofProducts.2BasictheoryInfluencedbytheeffeCtofvariousf8ctors,prod…     

Research on Fault Evaluation of Armament Equipment Based on ADAMS

1 IntroductionNowadays the local wars suggest that the key of succedng is the comParison of intmptive force,though advanccd Weaponry is becOndng moe and moe impotant. As the convelltional opPrssiveweaPO, artillery still plays a necessary Psit in m(for war Howevec arhllery Inay encounter allkln(l8 of faultS in the course of maintenance alld suPpot of armament equipment fOr incorreetiyOperahng and other natural reasons, and the faults win direetly affect the wobong performace ofarhllery Rec…     

Wetting characteristics of sodium on β″-alumina and on nasicon

The sessile drop technique was used to determine the wetting characteristics of liquid sodium on -alumina and nasicon (Na₃Zr₂Si₂PO₁₂). The effects of moisture and temperature were studied using the wetting experiments. A range of contact angles (from 0 to 160°) were observed. The samples exposed to moisture exhibited poor wetting. The fact that good wetting is a prerequisite for improved cell performance was demonstrated via Na ¦-alumina¦ Na cell tests. Cells baked out in a vacuum passed in excess of 1100 Ah cm^–2 at 4 A cm^–2 current density without any degradation. Unbaked cells under similar conditions failed under 200 Ah cm^–2.     

Interchain interaction effects on polaron–bipolaron transition on conducting polymers

We investigate the effects of interchain interaction on the polaron–bipolaron transition on conjugated polymer. We use a Su-Schrieffer-Heeger model modified to include interchain interaction, an external electric field and electron–electron interaction via extended Hubbard terms. We study the dynamics within the time-dependent unrestricted Hartree-Fock approximation. We find that adding a hole in interacting conducting polymer chains bearing a single positively charged polaron leads to the direct transition of polaron to bipolaron state. The transition which is produced is single-polaron to bipolaron transition whose excitation spectrum explains the experimental data. The competing mechanism of two polarons merging to form a bipolaron is also observed under special circumstances. We also find that depending on how fast the hole is inserted, a structure that contains a bipolaron coupled to a breather is created. The bipolaron-breather pair can be decoupled under the action of an external electric field.     

Studies on β-FeOOH

Akaganeite is transformed into haematite at 300° C through a quasiamorphous intermediate phase at 200° C. The XRD patterns, crystallite sizes, infrared spectra, conductivity measurements, scanning electron micrographs and density values confirm the presence of an intermediate phase at 200° C. The chloride content decreases sharply between 200 and 300° C and remains with haematite up to 600° C. The quasiamorphous phase possesses the highest surface area, lowest crystallite size, lowest density and diffuse XRD patterns of all the heat-treated products of-Fe00H.     

Study on Fault Dictionary

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Understanding environmental impacts on initial atmospheric corrosion based on corrosion monitoring sensors

Atmospheric corrosion monitoring(ACM)sensors were employed to study the initial atmospheric corrosion of carbon steels over a one-month period in six outdoor dynamic atmospheric environments in China.Based on the~250,000 corrosion data sets collected,the environmental impacts of relative humidity,temperature and rainfall on the initial corrosion behavior of carbon steels were investigated.The results showed that rainfall was the strongest environmental factor influencing the initial atmospheric corrosion rate.Relative humidity significantly influenced the corrosion of carbon steels in low-precipitation environments and non-rainfall period.     

Wearable Battery-Free Perspiration Analyzing Sites Based on Sweat Flowing on ZnO Nanoarrays

We fabricated wearable perspiration analyzing sites for actively monitoring physiological status during exercises without any batteries or other power supply.The device mainly consists of ZnO nanowire(NW)arrays and flexible polydimethylsiloxane substrate.Sweat on the skin can flow into the flow channels of the device through capillary action and flow along the channels to ZnO NWs.The sweat flowing on the NWs(with lactate oxidase modification)can output a DC electrical signal,and the outputting voltage is dependent on the lactate concentration in the sweat as the biosensing signal.ZnO NWs generate electric double layer(EDL)in sweat,which causes a potential difference between the upper and lower ends(hydrovoltaic effect).The product of the enzymatic reaction can adjust the EDL and influence the output.This device can be integrated with wireless transmitter and may have potential application in constructing sports big data.This work promotes the development of next generation of biosensors and expands the scope of self-powered physiological monitoring system.     

Scheduling on 2-Machine Flow Shops Considering Disturbance on Job Processing Times

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A Study on Engine Life Span Based on Engine Assembly Quality Analysis

1 IntroductionThe useful lifC (or ndleage between overhaul) is an imPortant index to assess the assebolyquality of an engine. TO a considerable degree, the useful life of an engine is dePendent on themath characters of every friction pair of crank link mechanisms, esPecially the statUs ofCylinders and pistons. The wear value of a cylinder is the most used parameter to decide whetheran engine shOuld be ovCrhauled or not.Because there are varous errors in every Part of the engine, cylinder b…     

Effect of zinc composition on properties on PEC cells based on sprayed Cd1−x Zn x S films

Polycrystalline Cd_1−x Zn _x S films were prepared by spray pyrolysis technique, both on conducting and non-conducting glasses. These films were used as photoanodes in photoelectrochemical cells. The optical and electrical properties of these cells are studied and the effect of zinc composition on these properties is revealed.     

Macroscopic Studies on the Properties of the Anodic Oxide Films on Titanium

The effect of fluoride ions on the formation and dissolution behaviour of anodic oxide films on Ti has been investigated in acidic fluoride media (pH=1) using impedance and galvanostatic techniques. A5 the fluoride ion concentration and temperature increase the rate of oxide film formation decreases while the dissolution process increases. oxide film formed at high tem-perature and formation voltage was found to contain more defect sites in the film than that formed at a lower one. Activation energies are calculated during the oxide film formation and dissolution and found to be 20.76 and 28.72 kJ/mol, respectively. Formation rate and reciprocal capacitance data are reported as a function of polarizing current density. Values are recorded for the electrolytic parameters A and B. Potentiostatic curves are derived from the galvanostatic results.     

Study on Plant Management Information System Based on Intranet for HongHe Cigarette Factory

1 IntroductionIn medium and large-scale enterprises, there are large quantities of equipment whose value is more than millions of dollars. Equipment management is an important and complicated work, and the single department can not do it well. It needs to be supported by some correlative departments. Traditional management mode is not suitable because of its slow process speed, low accuracy and lower economic benefit. However, with the popularization of computer, a lot of enterprises carry ou…     

Theory of Nucleation on Dislocations

Cahn's theory of nucleation on dislocationshas been analyzed thoroughly and the imperfectionof the theory in some cases has been discussed.Arevised theory has been proposed with applicationto the problem of precipitation of M(CN)phase inaustenite.     

Comments on “deadlock prevention policy based on petri nets and siphons”

Some well-known decision problems can be regarded as special cases of the resource-constrained project-scheduling problem (RCPSP) with respect to the structure of their mathematical models. These decision models include assembly line balancing, job shop scheduling and some packing problems. Here, the differences and similarities of mathematical models of the multilevel capacitated lot-sizing problem (MLCLSP) and the RCPSP are shown, and it is concluded that the RCPSP is a special case of the MLCLSP. This theoretical result is complemented by an integrated, general model formulation that allows one to coordinate customer-specific orders and make-to-stock (lot size) production at the master (production) planning level.