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Objective: To investigate the efficacy of combined treatment of dendritic cell-cytokine-induced killer cells (DC-CIK) and chemotherapy on colorectal cancer (CRC) patients who have undergone radical resection, and its effect on immune function and quality of life. Methods: Data of 103 CRC patients after radical resection admitted to Xianyang First People’s Hospital and Yanan University Affiliated Hospital from March 2018 to March 2020 were retrospectively analyzed. A total of 50 patients treated with XELOX chemotherapy were included in the control group (CG). The remaining 53 patients treated with XELOX chemotherapy combined with DC-CIK were included in the observation group (OG). The therapeutic efficacy, immune function indicators, serum tumor markers before and after the treatment, adverse reactions, 2-year survival rate, and quality of life 6 months after the treatment were observed and compared between the two groups. Results: The OG was identified to have a better therapeutic effect than the CG (P0.05). The quality of life six months after the treatment and the 2-year survival rate in the OG were significantly higher than those in the CG (P

In this study, combined effect of coarse aggregate and fiber properties on tensile behavior of ultra-high performance concrete (UHPC) was investigated. Four replacement levels of coarse aggregates (0%, 15%, 25%, 35% by volume of mortar) and four types of steel fiber (three micro-fibers with a shape difference and one macro-fiber) were considered. Results showed that replacement level of coarse aggregate has a critical value of 25% and different fiber types act similarly in regard of compressive strength. Coarse aggregate brought impairment to bonding strength and utilization efficiency of fiber, especially for deformed ones. Furthermore, coarse aggregate could be successfully introduced into system of UHPC without impairing its tensile properties at a favorable replacement level (⩽25%). In addition, phenomenon of strain hardening behaviors of UHPC incorporating coarse aggregate could be triggered by further increasing fiber dosage to larger than 2.5%, however, it was independent of fiber type due to combined effect of coarse aggregate and fiber bridging.

A composite fiber based on carbon nanotube (CNT) and poly(vinyl alcohol) (PVA) was prepared by melt-spinning. Structural features and the mechanical performances of the PVA/CNT composite fiber were investigated as a function of draw condition. Initial moduli and tensile strengths of the drawn composite fibers are much higher than those of undrawn composite fiber. It is identified from XRD and 2D XRD that the composite fiber exhibits enhanced crystallinity and orientation degree with increasing the draw ratio. Accordingly, finger-like pores distributed along the axial direction homogeneous on the melt-spinning PVA fiber surface. After dry and hot-drawn, the hydrophobicity of PVA/CNT composites fiber decreased gradually.

Polyoxymethylene (POM) fiber was produced by melt spinning with a high take-up speed, which imposed a strong flow field. An unexpected formation of a shish-kebab morphology with multiple shish of POM fibers was reported for the first time. This morphology is a large-scale shish kebab with a diameter of 10.5 µm. Further orientation of the POM fiber was obtained by hot stretching twice at 160°C. Two crystalline morphology evolution processes were also observed: (i) the process from the large-scale shish-kebab to the deformed small shish-kebab and (ii) the process from the deformed small shish-kebab to the perfect whiskers. Compared with the melt spinning fiber, fiber tensile strength with first and second hot stretching increased by 976% and 1705%, respectively. The crystalline melting behavior of fibers significantly changes after the first and second hot stretching. The flow field induces a large number of extended chain crystals. Copyright © 2014 John Wiley & Sons, Ltd.

Fiber distribution in fiber reinforced cementitious composites (FRCC) is a critical factor affecting the reinforcement of fiber to composites. However, evaluation of fiber distribution in 3-dimension (3D) space has always been a great challenge due to the lack of transparency of FRCC and random distribution of fiber. To address this problem, micro-computed tomography (micro-CT) was used to characterize fiber distribution in this study, which permitted 3D visualization within the materials. By 3D image reconstruction, processing and analysis of CT images, the curves of fiber orientation distribution (FOD) and fiber spacing distribution (FSD) in cementitious composites can be obtained, and the orientation factor and dispersion coefficient of fiber can also be determined. The effect of aggregate size and content on fiber orientation distribution in cementitious composites is more obvious than that on fiber spacing distribution. Compared to conventional approach of 2D image analysis of cross-section of FRCC, the micro-CT image technique appears more intuitive and accurate, especially in the assessment of fiber dispersion.

In this paper, a new technique for detecting inter turn short circuit fault in large turbogenerator rotor winding is presented. Based on single-end fault information, this new technique applies wavelet analysis method to inspect abruptly changed signals. The transient current traveling wave that generated in the rotor winding inter turn short circuit contains ample fault information, and its basic characteristic is current "abruptly changed". According to the "abruptly changed", there are modulus maxima after wavelet transform, and we can detect generator inter turn short circuit fault through this characteristic. We have conducted correlative experiment on dynamic analog experiment unit, and the coincidence conclusion with the theory analyses is obtained.

It is noted that torsional vibration considerations of the tube mill are very important for the normal operation and design of tube-mill drive systems. The theoretical basis for obtaining mathematical models of the mill torsional-vibration system is discussed. The dynamic parameters of the practice tube-mill system in cement plants are calculated by using state-space representation and complex modal analysis techniques. Also examined is the damping of tube-mill torsional vibration, including such techniques as electromagnetic damping, oil damping, and grinding medium damping. It is shown that these dampings have a powerful effect on the dynamic response of the mill drive system. Experimental research performed on tube-mill systems in cement plants is also reported. The test data and calculated results are shown to agree very well. >