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In order to improve the spinnability of flax fiber during alkali treatment and save reagent, the effects on the properties of flax fiber are studied under the condition that both ultrasonic and NaOH reagent. It was observed that in the process of alkali treatment to flax fiber, it was better than use ultrasonic when it comes to the length, splitting degree and short fiber content. During the process of alkali treatment, the processing effects were good when the temperature was 50°C, time 30min, frequency 28kHz, concentration of NaOH 10%. Not only the spinnability of the flax fiber is improved with the use of ultrasonic, but also the problems high consumption of time, and pollution are solved.

Progress of gain-switched Tm-doped fiber lasers is reported. Different pump schemes including 1μm, 790nm, 1.6μm, 1.9μm and combined pump are described in detail. Comparisons among these different pump schemes are given. Discussions are made and other possible pump schemes are proposed.

In this paper, several nonwoven and woven clothing are be selected for tested their protective, strength and comfortable. Through analysis their properties, the result can be seen that the nonwoven fabrics have better protective properties than woven fabrics, especially PVA nonwoven through water resistance finish. So, varies nonwoven clothing is used in hospital and family protective daily.

A near-infrared detecting array is developed combining photoelectric and calorimetric method together to measure CW beam profile of high energy lasers. Detailed structure and functional modules of this system are described. The system is widely sensitive to the wavelength range of 0.9~1.7μm and the power density range of W/cm2～kW/cm2. It has an effective detecting area of 22cm×22cm with a spatial resolution of 1.1cm and a temporal resolution of 20ms. Experiments show that the uncertainty of the total energy measurement is 10% and the uncertainty of the power density distribution measurement is less than 15%.The measuring system has been successfully applied in the measurement for the far-field beam of high energy lasers.