China’s domestic tourism has developed quickly in the past 20 years. This article briefly reviews the scale of expansion in domestic tourism in China and summarizes three important factors contributing to that great change. In search of development trends, the article examines the main products of domestic tourism and government policy changes that influence tourism development. The conclusion is that China’s domestic tourism has shifted to the 3H (high input, high risk and high output) pattern. Besides intermediate‐long‐haul sightseeing and business tourism, domestic tourists frequently take medium‐short‐distance sightseeing trips and short‐distance weekend vacations, which forms ReBAM (Recreational belt around metropolis), a new tourist spatial pattern.

Summary An efficient intrinsic flame retardants composite was prepared by curing epoxy resin with a functional magnesium organic composite salt (FMOCS, 0.685 ± 0.3 nm) and diethylenetriamine (DETA). Curing behavior, thermal and flame‐retardant properties of the cured epoxy resins were systematically investigated by infrared spectrum (FTIR), thermogravimetric analysis (TGA), vertical burning test (UL‐94) and limited oxygen index (LOI) measurement. It was found that flame retardancy and mechanical properties of the cured composite are significantly enhanced compared with DETA/EP. The LOI of the EP reached to 33%, which is much higher than the DETA/EP (19%) or its IFR composite (31%) in the optimal addition of ammonium polyphosphate (APP, 18.69 wt %), pentaerythritol (PER, 6.21 wt %) and FMOCS (3.50 wt %). Furthermore, the mechanical properties of the composite material measurement results to imply that it can enhance tensile strength (150%) and bending strength (88%) rather than DETA/EP, which were tested by impact testing machine and microcomputer control electron universal testing machines. Copyright © 2016 John Wiley & Sons, Ltd.

A methane detection system based on tunable diode laser absorption spectroscopy (TDLAS) using LabVIEW platform was demonstrated. To suppress the noise interference in the system, a wavelet denoising method was studied and experiments with different parameters were carried out. With the threshold of Hard, the wavelet basis of Coif5 and the rule of Heursure, high frequency noises of the sensor can be effectively decreased with the harmonic amplitude increased. Experiments showed that, the 1σ minimum detection limit (MDL) was 23.68 ppbv (part per billion of volume) with an integration time of 300 s.

Acknowledgments. This paper is based on work supported by the National Science Foundation under Award Number SES9816816. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the National Science Foundation. Keith Brouhle and Yan Song collected and organized much of the data for this analysis. Alex Anas provided useful suggestions during the course of this work and Elizabeth Holler provided useful editorial suggestions.

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