Papers by Keyword: TPS

Abstract: In this work, the improvement of thermal and ablative properties of the phenolic resin by the addition of silicon carbide (SiC) and montmorillonite (MMT) were studied. The phenolic composites were fabricated by hot compression. The thermal stabilities, mechanical properties and ablative properties of the neat phenolic resin and the SiC/MMT phenolic composites were examined using a Lloyd universal testing machine, thermogravimetric analysis (TGA) and ablation tests (an oxyacetylene torch), respectively. Mass ablation rates were measured after flame exposure. The results showed that SiC/MMT provided the higher thermal stabilities and lower ablation rates to the phenolic resin.

Abstract: The system uses a high stability of the VXI bus as the control core, and a variety of advanced electronic materials with fault diagnosis method in the application of mature TPS test vector generation method, the set of fault dictionary and intelligent exploration pen in one, for under the conditons of modern information technology equipment rapid and ifficient protection of the ability to provide a resrarch avenues to explore. The TPS-based circuit board electronic materials with fault diagnosis system has been successfully used in the diagnosisi of barious types of radar circuit.

Abstract: Poly (lactic acid) (PLA), produced from renewable resources, is one of the most widely used biodegradable polymers. PLA has high strength and high modulus. However, its brittleness and high cost limit its application. Starch has been used as filler for environmental friendly polymers due to its low cost, biodegradable, and availability as a renewable source. Thermoplastic starch (TPS) is a biodegradable material based on starch. Incorporation of TPS into PLA matrix can reduce material cost and increases its biodegradation rate. However, PLA and TPS form immiscible blend leading to poor mechanical properties of the blend. The compatibility of the blend can be improved by adding compatibilizers. Moreover, in order to improve toughness of the TPS/PLA blend, poly (butylenes adipate-co-terephthalate) (PBAT), is introduced into the blend. In this study, PLA/TPS blends are prepared using an internal mixer and test specimens are molded using a compression molding. TPS is obtained from cassava starch and glycerol at ratio of 70/30 wt%. The ratio of TPS/PLA blend is 10/90 wt%. Poly (lactic acid) grafted maleic anhydride (PLA-g-MA) is used as a compatibilizer at contents of 3, 5, and 7 phr. PBAT content is 10 wt%. Mechanical, morphological, and thermal properties of the blends are investigated.

Abstract: To improve the efficiency and accuracy of the conventional SIFT-TPS (Scale-invariant feature transform and Thin-Plate Spline) method in deformable registration for CT lung image, we develop a novel approach by using combining SURF(Speeded up Robust Features) and GDLOH(Gradient distance-location-orientation histogram) to detect matching feature points. First, we employ SURF as feature detection to find the stable feature points of the two CT images rapidly. Then GDLOH is taken as feature descriptor to describe each detected points characteristic, in order to supply measurement tool for matching process. In our experiment, five couples of clinical images are simulated using our algorithm above, result in an obvious improvement in run-time and registration quality, compared with the conventional methods. It is demonstrated that the proposed method may create a new window in performing a good robust and adaptively for deformable registration for CT lung tomography.

Abstract: After introducing the research background of the universal test platform for airborne guidance weapon, the paper puts forward its hardware architecture which is built based on multi-bus fusion. The main functions of its software are described and its software architecture is proposed. To realize the transportability and inter-operation ability of TPS, its software is developed with the method of signal-oriented using the test language-ATLAS and is compiled and run on PAWS. The software of VC++、Lab Windows/CVI and so on are adopted to develop interface and instrument drive of the system. The software development process with PAWS is also introduced. Its software is expansible and when the test platform adds a new airborne guidance weapon which needs to be tested, only adaptor database Ita.ITA and TPS database need to be developed.

Abstract: 3D face sample is an important data platform for model training, algorithm design. Subject to the constraint of data acquisition equipment the size of current 3D face databases are relatively small and insufficient. To solve this problem, this paper presents a modeling way for generating 3D novel samples based on surface stitching. First we use morphable model to build a global model. Then, we replace each patch of the global model based on surface stitching. We demonstrate that with appropriate choice of local models it is possible to reliably generate new realistic face samples.

Abstract: Two structures of metallic thermal protection system(TPS) for hypersonic vehicle were presented. One model was a multi-layer construction and the other has cavities in the metallic layer. Numerical simulations were conducted on the three-dimensional TPS models using CFD software of Gambit and Fluent. Two heating temperatures of 1073K and 773K with constant temperature and isothermal boundary conditions were considered. Heat transfer was treated as single conductivity and thermal radiation effect was not involved. The results of simulation investigation showed that: The metallic layer had poor capability to restrict the heat conductivity. Heat was easier to transfer across the bracket into the internal part of the TPS. The ability of cavities in metallic layer to resist heat conductivity was limited. The temperature-heating time variation pattern was similar for different external heating temperature. Internal cooling was important for the TPS. The thermal radiation effect on the TPS would be focused in further research.

Abstract: Banana fibers received four treatments, namely squeezing, alkali and hydrogen peroxide treatment, washing with water, and drying. Thermoplastic starch composites was prepared with glycerol as the plasticizer, banana fiber as reinforcement and thermoplastic cassava starch as matrix. The banana fiber could increase processing torque highly, while the effects of fiber contents on peak torque at 3min was so obvious. X-ray diffractograms illustrated that with increasing fiber content, cellulose crystallinity at 22.5° gradually got stronger but starch crystallinity at 20° almost didn’t. SEM micrographs showed good dispersion and adhesion between starch and fiber. Studies in the dependence of mechanical properties of reinforced TPS on the contents of fiber that with increasing fiber content from 0 to 20phr, the initial tensile strength was trebled up to 14.46 MPa, while the elongation at break was reduced from 68 to 13%. TG mass loss curves showed that thermal stability of this composites had great improved under 500°C.

Abstract: After a preliminary investigation on the binary asphalt/clay binder, the ternary binder was prepared by adding the nanoclay and TAFPACK-SUPER (TPS) to the original asphalt. The previous research shows that exfoliated/intercalated layers homogeneously are dispersed in the asphalt matrix and the nanocomposite has formed. Rotation Thin Film Oven Test (RTFOT) and Pressure Age Vessel Test (PAV) results indicate that the modified asphalt with 3% organic nano-montmorillonite (OMMT) present better performance of aging resistance. The purpose of this research is to attain ternary asphalt binder with better rheological performance and aging resistance. The ternary modified asphalt binder containing 4% OMMT and 12% TPS by weight were prepared at the laboratory scale using high speed shearing mixer. The rheological properties of OMMT/TPS modified asphalt binders were evaluated before and after aging in present paper. Temperature sweep tests and frequency sweep tests were conducted to characterize the rheological properties of modified asphalt using Dynamic Shear Rheometer (DSR). According to the frequency sweep tests, complex modulus master curves were plotted to analysis the rheological properties. The results indicate that nanoclay/TPS/asphalt ternary binders have more excellent performance of rheological and aging resistance at both high and low temperatures, compared with the virginal bitumen and TPS modified asphalt.