Advanced Materials Research Vol. 1052

Abstract: Ocean engineering structures often suffer from ice disaster damages, and the mechanism of interaction between sea ice and ocean structures is complex, the sea ice own properties are also changeful. Based on field researches and statistical results we can know the ice force amplitude. The solid model was established by the ANSYS Workbench module, then simulate the interaction of ice load and ocean engineering structures to verify the safety of ocean engineering structure. This kind of treatment provides an effective method for solving the similar problems, to guarantee the safety of ocean engineering building objective. Keywords:Ocean engineering structures; anti icing safety; ice force amplitude statistics; finite element method

Abstract: With the significant progress in the, combining global industry section, new technoligies come the increased generation of solid waste and the consequent concern with the correct management. One of the major problem of the foundry industry is the generation of solid waste mainly constituided by residual sands or discarded foundry sands. (ADF). The proper disposal of this waste is a challenge for the industries that are increasinly concerned in the need to preserve the environment in pursuit of sustainable long-term development. In Brazil the production of castings in 2008 exceeded 3 millhion tons, with the generation of approximately one ton of waste for each ton of pruduced metal. The main destination of this waste currently occures in industrial landfill disposal that bisides having a high cost which is an increasing environmental concern for the companies. Solving this problem is one of the duties of this work or in other words we propose a methodology to reuse solid waste. We tested our metodology, specimens have been made with the incorporation of foundry sand at different concentrations in ascending order in every 5% replacing the natural sand for casting sand. Throught this article we have shown the proposed metodology for the use of concret blocks.

Abstract: This paper introduces the composition, function, system construction and construction technology of ACF Inorganic Fibers Wool Board External Thermal Insulation System (Abbreviation: ACF System), and also evaluated its properties. Results showed that all the performance indexes of this system meet the requirement of company standard. The good effect has been achieved in its application in energy-efficient retrofit in existing building of Xicheng District, Beijing. It demonstrates that the ACF System not only satisfies the building energy efficiency requirements but also owns a good fire resistance property as a new building fire-resistant insulation system. It possesses a prospect market and extending significance.

Abstract: A novel cavity perturbation technique utilizing open-ended coaxial resonator is presented in order to measure the complex permittivity of insulating substrates at microwave frequencies. This technique can afford quite high accurate measurement results without singularities, and simply. According to the operation frequency of the resonator, the geometric parameters of the resonator are designed. Based on the perturbation technique, a new formulaic method of data analysis has been proposed which can extract complex permittivity of samples, and with the resonant frequency and the quality factor shift, one can calculate the complex permittivity of the measured materials. Experiment has been conducted with the quartz and sapphire to verify the formulaic, and the test results fully verify the correctness of the proposed method.

Abstract: In this work, about 100 nm palladium layer was coated on the front surface of n-type epitaxial silicon wafer by vacuum evaporating and etched electrochemically in 0.1 M HF-HCl solution to form palladium nanoparticle modifying n-silicon electrode. Scanning electron microscope (SEM) and x-ray photoelectron spectroscopy (XPS) were used to characterize the morphology and composition of the modified electrode surface. The modified electrode has been used to constitute a novel photo-electrochemical sensor for the detection of ascorbic acid (AA) with a two-electrode cell in absence of reference electrode by photocurrent measurement at a zero bias. The photocurrent determination of AA shows two linear dynamic responses over the concentration range of 2 μM–42 μM and 82 μM–642 μM with a detection limit of 2.0×10⁻⁶ M. Furthermore, this sensor demonstrated good stability, repeatability and selectivity remarkably.

Abstract: Positioning hydraulic system failure rate is high, the fault detection difficult. This paper introduces the involvement type hydraulic system the basic principle of measuring technology, hardware design and software design. The interventional type hydraulic detection method to overcome the traditional type detection method increased the complexity of the hydraulic system fault, without using the reserved interface. Research on fault diagnosis technology of hydraulic system of the intervention is very important for the development of the hydraulic system fault diagnosis.

Abstract: Abrasive processes are influenced by many different parameters. For a systematic investigation of these influencing parameters, a test bench for abrasive tools has been developed and set up on a 3-axis milling machine. The test bench is capable to control the machining parameters, such as the cutting speed and the feed speed, regulate the lubrication conditions, such as the temperature or the flow rate, and measure the cutting force during the process. Impacts of the single force components are investigated by means of the abrasive tools in contact with the rotating workpieces and the calculation of the tangential force coefficient. In this paper, the set-up of the test bench is explained and the systematic proceeding in investigating the impacts is exemplified by cooling lubricants because the surface of the workpiece, the wear of the tool, the temperature and the friction forces are often influenced by the type of cooling lubricant and its composition. The aim of the test bench for tools is to understand the correlations of the single influencing parameters in abrasive processes. The first results of comparative investigations with cooling lubricants of different viscosities are presented and discussed.

Abstract: The technology of fluorescent optical fiber temperature measurement has been used in many fields to accurately measure the variations of temperature, especially in some extreme environment, such as strong electromagnetic interference under, high voltage conditions. Wavelet analysis is the most frequent method used for signal processing in this technology. This method has excellent local characteristics and its precise of processing is high, whereas its result relies heavily on the selection of the wavelet basis, and has certain limitation. In this paper, a novel approach for fluorescent signal processing based on Hilbert-Huang transform is presented. A given signal is decomposed into a collection of intrinsic mode functions (IMF) by empirical mode decomposition, then Hilbert spectral analysis is performed for each of the IMF. According to the difference of signal and noise characteristics, HHT can generate adaptive modal functions and remove the noise from signal effectively, so that the signal to noise ratio can be improved. The result of experiment shows that HHT features convenient usage, fast processing and high resolution in time and frequency domains.

Abstract: This paper introduces pipeline full-scale fatigue test machine developed by ourselves, including system constitution, main function, mechanical and hydraulic system design, control system development etc. Host framework design and strength calculation, the main technical parameters of the testing machine, working principle and characteristic is highlighted. The development of the fatigue test machine provide a significant basis for research of pipeline fatigue assessment and design, life prediction, also has the important practical significance and broad application prospects.

Abstract: Small-molecule fluorescent probe with advantages of small size, low background and simple preparation have been widely used. The detection of anions by small-molecule fluorescent probes is usually achieved through one of the following reaction mechanisms: hydrogen bonds and electrostatic interactions; metal or Lewis acid coordination; covalent interaction. This article summarizes the advances in the design principles of small-molecule fluorescent probes for the detection of anions in biological and environmental media in recent years.