Objectives To develop a magnetic resonance imaging (MRI)-based radiomics model for predicting the severity of radiation proctitis (RP) in cervical cancer patients’ post-radiotherapy. Methods We retrospectively analyzed clinical data and MRI images from 126 squamous cell carcinoma patients treated with concurrent chemoradiotherapy. Logistic regression (LR), Pearson correlation coefficient, least absolute shrinkage selection operator (LASSO) methods were utilized to select optimal features,...

Abstract The structures of the intumescent charred layers formed from polyolefin (PO) blends with expandable graphite (EG) and/or other free‐halogen flame retardant (HFFR) and their flame‐retardant mechanism were studied by Fourier transform infrared (FTIR) spectroscopy, X‐ray photoelectron spectroscopy (XPS), laser Raman (LRS), scanning electron microscopy (SEM), differential thermal analysis (DTA), conductivity (TC) measurements. FTIR, XPS, LRS data showed that carbonaceous consist EG...

Hyperbranched poly(amido amine) is grown from the surface of carbon nanotubesvia a multi-step Michael addition reaction, hence amido and amine units are linked onto nanotubes. These can facilitate assembly nanotubes with other functional polymersviahydrogen bonds. The external ultrasound-stimulus found to induce functionalized multi-walled linear into smart nanotube gel viahydrogen notable advantages this method that gelation very fast controlled by ultrasound strength, formed gels not only...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinitiated crosslinking of low-density polyethylene. 6. Spin-trapping ESR studies on radical intermediatesBaojun Qu, Yunhua Xu, Wenfang Shi, and Bengt RaanbyCite this: Macromolecules 1992, 25, 20, 5215–5219Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org/doi/10.1021/ma00046a016https://doi.org/10.1021/ma00046a016research-articleACS PublicationsRequest...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinitiated crosslinking of low-density polyethylene. 7. Initial radical reactions with model compounds studied by spin-trapping ESR spectroscopyBaojun Qu, Yunhua Xu, Wenfang Shi, and Bengt RaanbyCite this: Macromolecules 1992, 25, 20, 5220–5224Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September...

An easy procedure to introduce a photocrosslinked interface for polypropylene (PP)/maleic anhydride grafted styrene-b-(ethylene-co-butylene)-b-styrene triblock copolymer (mSEBS) thermoplastic/elastomer blends by UV radiation is reported. This involves free-radical crosslinking at the between mSEBS domain phase and PP matrix in domains with benzophenone (BP) as photoinitiator triallyl isocyanurate (TAIC) agent. Compared absence of photocrosslinking, structured PP/mSEBS interfaces confirmed...

This work has made an exploratory study on photocrosslinking of low density polyethylene (LDPE) as insulating material. The kinetic character, efficiency and mechanism LDPE in the melt, main parameters affecting crosslinking processes have been studied, density, homogeneity some properties crosslinked products(XLPE) were examined. Our results show that (1) by optimizing reaction conditions sheets thick 2-3mm readily photocrosslinked with gel content more than 70% irradiation time 15 seconds;...

This paper develops a new detection system, for the first time, to detect gas concentrations of SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> /N xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> mixture in extra/ultra-high voltage power transmission systems. The and N are calculated from thermal conductivity function gas. main contribution this work is that specially-designed thermostatic chamber with adaptive temperature...

By using statistical approaches, a calculation model of anomalous loss in magnetic materials is built on the basis production and domain wall motion. Based that, macrophysical interpretation this described detail, testing method to determine microstatistical characteristic parameters proposed due pure obtained by separation total experimental core losses electrical steel sheets. Meanwhile, characteristics coefficient are analyzed. In addition, rotating can be extended model. Therefore, under...

Abstract Ferrocene- and iron-arene salts can photoinitiate polymerization of pyrrole in the presence halogenated solvents, such as CH2CH2Cl2, CHCl3, CCl4, when irradiated with UV light (254 nm). The polypyrroles obtained are black colloidal powders have low conductivity range 10−5 S cm−1 rather poor electrochemical properties, which be result loss conjugation by halogenation. Polypyrrole samples contain both covalently bounded CCl3 groups (from CCl4) ionic FeCl− 4. A mechanism photoinitiated...

Films of low-density polyethylene (LDPE), high-density (HDPE) and polypropylene (PP) have been surface photografted with different polymerizable 2-(2-hydroxyphenyl)2H-benzotriazole monomers [2-(2-hydroxy-4-acryloxyphenyl)2H-benzotriazole (BDHA), 2-(2-hydroxy-4-methacryloxyphenyl)2H-benzotriazole (BDHM), 2-(2-hydroxy-5-vinylphenyl)2H-benzotriazole (2H5V) 2-(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole (2H5P)] in the presence benzophenone as photo-initiator using 254 nm ultra-violet...

Abstract The interlayer surface of MgAl layered double hydroxide (MgAl‐LDH) was modified by exchanging about half the nitrate anions dodecyl sulfate (DS) to get MgAl(H‐DS) LDH, and then melt intercalated LLDPE LLDPE/MgAl‐LDH exfoliation nanocomposites. samples were characterized Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), ion chromatography, transmission electron microscopy (TEM), thermogravimetry analysis (TGA). nanoscale dispersion MgAl‐LDH layers in matrix...

Aiming to successfully meet the requirements of a large output torque and wide range flux weakening speed expansion in permanent magnet synchronous motors (PMSM) for electric vehicles, novel surface insert motor (SIPMSM) is developed. The method notching auxiliary slots between magnetic poles rotor unequal thickness proposed improve performance motor. By analyzing circuit characteristics SIPMSM, adjacent can affect q-axis inductance, shape pole effects d-axis inductance combined action two...

By using a 3-D magnetic properties testing system, rotating core losses considering harmonics and skin effect of the bulk soft composites are measured modeled. On basis calculation approach, transformed coefficients parameters determined. Then, variable loss coefficient model indirect orthogonal decomposition anomalous thus built in this paper. Meanwhile, separation total experimental is worked out. In addition, measurement for typical electrical steel sheets carried out under alternating...

Abstract An organo‐modified MgAl‐layered double hydroxide (OMgAl‐LDH) was successfully exfoliated in the xylene solution of polyethylene‐grafted‐maleic anhydride (PE‐g‐MA) under re‐fluxing condition. A PE‐g‐MA/MgAl‐LDH exfoliation nanocomposite formed after precipitation PE‐g‐MA from dispersion system. The structure and thermal property were characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetry analysis (TGA). disappearance d 001 XRD peak...

In light of the heavy load applied by traditional air spring test equipment and its complex structural system design, a lever-type torque loading is designed. It adopts principle Chinese scales to apply on in form proportional amplification, which can simulated 500–800 kg, using vertical sliding shaft as transverse limit make elongate compress 280 mm longitudinal direction. The measurement control then developed based LabVIEW platform, required sensors are selected installed. achieve...

Currently, key factors hindering application of steer-by-wire systems are their inadequate safety and reliability, which significant criteria for evaluating automotive active safety. Based on the platform, a dual-redundant steering motor control system is proposed, featuring dual three-phase permanent magnet synchronous motors as execution motors, achieving redundancy from hardware. A torque vector-space-decoupling method introduced these to ensure balanced stable output. Upon fault,...