Taking geothermal heat as the heat source, KCS⁃11, KCS⁃34 and KSG⁃1 as the bottom cycles respectively, the thermodynamic and thermoeconomic performance of three systems combining flash⁃Kalina cycle and absorption refrigeration cycle (F⁃KCS11⁃ARC, F⁃KCS34⁃ARC, F⁃KSG1⁃ARC) were compared and analyzed. The results show that the total exergy loss of the F⁃KCS11⁃ARC system is 5.3% and 2.7% lower than that of the F⁃KCS34⁃ARC system and the F⁃KSG1⁃ARC system,respectively,and the component with the largest exergy loss is the heat exchanger 1. The F⁃KCS34⁃ARC system has the highest thermal efficiency, but the F⁃KCS11⁃ARC system has the highest heat recovery efficiency when the geothermal source temperature is in the range of 155～220 °C, and the smaller geothermal source temperature and flash pressure can make the system obtain higher heat recovery efficiency.Thermal economic analysis shows that pump 1 is the most expensive component in all three systems, the next is steam turbine 2. The F⁃KCS11⁃ARC system has the lowest cost, the highest annual net income, and the smallest investment recovery period, with values of 2.09×106 $, 6.61×105 $ and 3.72 years, respectively.

Polypropylene V30G and K4912 were respectively modified by melting blend method to prepare the special high rigidity PP material for the small household appliances. The effects of content of two nucleating agents G5588 and T5688 on the properties of polypropylene were studied. The prepared material showed the best property when using polypropylene PP (V30G) as matrix resin and G5588 as the nucleating agent. When the mass fraction of G5588 was 0.20%, the tensile strength of rigid polypropylene was 35.3 MPa, flexural strength was 37.87 MPa, impact strength was 3.84 kJ/m2, and the melt flow rate was 16.32 g/(10 min).

Water film lubricated transport of super heavy oil is one of the energysaving technologies in the energy sector. In water film transport of super heavy oil,OFP produces a normalstress to make the water film stay steadily and no eccentrically phenomenon in the pipeline and plays a supporting role. To understand the change of the normalstress of OFP indepth in water film transport of super heavy oil, the effects of OFP to the stability of water film was analyzed through our experiments.The OFP is a viscoelastic liquid as the shear rate decreases and the solubility of OFP reduces gradually, and the normalstress difference also reduces gradually. 

The silane coupling agent KH570 was used for modifying the surface of calcium carbonate whisker. The optimal conditions of experiment were determined by activation degree and sedimentation volume. The results indicate that the optimum modification conditions are as follows: initial slurry concentration 10%, reaction temperature 80 ℃, coupling agent 2.5% and modification time 1.5 h. 

MC nylon was synthesized under the anionic polymerization of caprolactam to investigate the influence of the amount of catalyst and activator on the polymerization time and the crystalinity. The results show that with the increase of the amount of catalyst, the polymerization time shortens notably while the crystallinity increases at first and then decreases, that as the amount of cativator increases, the polymerization time shortens, and that the crystallinity increases at first and then decreases slightly.