Quality control is considered a critical aspect of plastic materials in the injection molding process. Two types deformations occur during process, namely, volumetric shrinkage and warpage. This study aims to optimize warpage polyethylene terephthalate preform (PET) used for packing carbonated drinks. PET results an uneven distribution material over wall surface causes variation thickness. During filling operation drinks, preforms are subjected high pressure at points where thickness...

Based on the Johnson–Cook constitutive model and modified Coulomb's law, study investigates impact of various process parameters weld temperature field in high-strength 5052 aluminum alloy friction stir welding (FSW) for aerospace applications. Utilizing a thermo-mechanical model, significance rotational speed, indentation peak is examined through Taguchi's orthogonal experimental design. S/N ratio ANOVA results show that speed has most significant effect weld, followed by amount...

Chitosanase is a significant chitosan-degrading enzyme involved in industrial applications, which forms chitooligosaccharides (COS) as reaction products that are known to have various biological activities. In this study, the gene csnS was cloned from deep-sea bacterium Serratia sp. QD07, well over-expressed Escherichia coli , new chitosanase encoding gene. The recombinant strain cultured 5 L fermenter, yielded 324 U/mL chitosanases. After purification, CsnS cold-adapted with highest...

Cancer-derived small extracellular vesicles (sEVs) serve as critical mediators of cell-to-cell communication. Manzamine A (MA), a unique marine-derived alkaloid with various bioactivities, exerts anticancer effects against several kinds tumors, but it remains unclear whether has the same activity breast cancer. Here, we proved that MA inhibits MDA-MB-231 and MCF-7 cell proliferation, migration, invasion in time- dose-dependent manner. In addition, promotes autophagosome formation suppresses...

Clamping bushing structure is an internode connection mechanism designed for the standard section of tubular truss tower. In this paper, clamping connecting super-large tower crane taken as research object, a three-dimensional model established and imported into ABAQUS, its multi-body contact further constructed to study bearing relationship under multiple working conditions, accuracy calculation results verified by experimental stress test tensile conditions. addition, based on control...

Purpose This paper aims to develop a new differential evolution algorithm (DEA) for solving the simple assembly line balancing problem of type 2 (SALBP-2). Design/methodology/approach Novel approaches mutation operator and crossover are presented. A self-adaptive double scheme is implemented an elitist strategy used in selection operator. Findings Test comparison results show that proposed IDEA obtains better SALBP-2. Originality/value The presented DEA called integer-coded (IDEA), which can...

The binary nitride coatings corresponding to Ti, Zr, Nb, Mo, and Ta have good thermal stability, hardening wear resistance, high-temperature oxidation resistance. Therefore, the high-entropy alloy coating composed of these five elements is expected show excellent mechanical properties, it suitable for extending tool life in dry-cutting environments. In this paper, (TiZrNbMoTa)Nx films were synthesized using a multitarget nonequilibrium magnetron sputtering technique. paper aimed at...

Based on the 3D transient heat transfer theory, finite element model of bobbin tool friction stir welding (BT-FSW) AZ31 magnesium alloy sheet is established. The effects different process parameters quality BT-FSW joint were discussed using temperature distribution, mechanical properties, fracture morphology analysis, and EDS distribution analysis. results show that in BT-FSW, cross-section plate symmetrically distributed an hourglass shape, AS slightly lower than RS, transverse 'M' shape....

As to the aircraft, structure, airborne equipments and aero-engine are of paramount importance. PHM (Prognostics Health Management) implementation can help aviation industry significantly improve safety standard. The basic principles, motivation key technologies involve sensing technology, fault diagnostic technology prognostic methods reviewed firstly in this paper, then specific application for aero-engines presented detail. Thirdly, exiting integrated systems relevant maintenance...

In this paper, a novel image denosing scheme is proposed by applying 2D dual-tree complex wavelet transform (DTCWT) to the second bandelet transform. Compared with traditional discrete (DWT), DTCWT has nearly shift invariant and directionally selective in two higher dimensions important properties, which are suitable for denoising. The offer an asymptotically optimal representation geometric images, but it lacks translation invariant. Firstly, employed obtain subands, then bandeletization...

The injection rate and dynamic behaviour during after the of dimethyl ether–biodiesel blends in a common-rail system are experimentally studied. characteristics instantaneous line pressure evolution induced by obtained. In comparison with biodiesel, 100 wt % ether starts later, but other fuels almost at same time. Increasing blending ratio leads to retarded end significantly prolonged duration, peak changes little. With increasing rail pressure, early change time increase, fluctuates more...

A two-cylinder, direct injection diesel engine was modified for a homogeneous charge compression ignition-direct (HCCI-DI) fueled with dimethyl ether. Effects of premixed ratio on HCCI-DI combustion characteristics were experimentally investigated. The results show that in combustion, as Rp increases, the peak pressure increases and its phase advances gradually; first rise rate second decreases, their gradually. With increase Rp, cool flame gradually, peaks diffusion decrease in-cylinder is...

In order to analyze the procedure of hot rolling sheet strip, model expansion coiler was simulated during strip coiling with FEM. The base conditions regulations, and studying rules displacement change law stripes nodes along innermost layer different layer, minimum safety yield, when loop coiled 2 or 3 layers, its head had rather larger displacement, 4 5, nearly a constant value. results were references vales constitute least before for technicians in field engineering increase speed.

This paper presents a new efficient algorithm for fitting an ellipse to scattered points. By minimizing the algebraic distance subject constraint of length semi-minor axis, approach incorporates ellipticity into normalization factor. The proposed method guarantees ellipse-specific solution even noised data spaning small section elliptic arc. Validation with experimental results demonstrates accuracy and robustness method.

In this paper, we propose a novel palmprint verification scheme named as Orthogonal Code based on multiple 2D Gabor Phase feature. A image contains various features with orientations, so only single orientation in the can not distinguish subject well. The filters different orientations are employed to extract texture information and phase-coding is used represent palmprint. At matching stage, Hamming distance similarity metric. experimental results of Hong Kong Polytechnic University...

The title panel information in engineering drawings is the important data source for product management (PDM). Firstly, structure of and bill material (BOM) drawing was analyzed, collected concourse based on describing cell put forward. Then text-objects line-objects within collection were handled to get text objects its position by recognition format recognition. And also, concerning extracted written into database. Finally, development implement TST compilation generation system...

In this paper, an important method for computing the tool-path, and constructing offset curves of pocket boundary generates its tool-path planning is Contour-parallel strategy. But it very difficult judgment disposal loop. The main disfigurement algorithm in contour-parallel calculation includes to judge dispose linking curves, take out curve intersection, redundant loop, check-up self-intersection test whole collapse, so on. A new calculate geodesic quickly presented paper. Based on method,...