Design of internal combustion engine (ICE) components is one of the earliest and also the most active areas in which computer aided modeling techniques are applied. Computer aided modeling techniques could provide req...Design of internal combustion engine (ICE) components is one of the earliest and also the most active areas in which computer aided modeling techniques are applied. Computer aided modeling techniques could provide requisite information for follow up designing segments such as structural analysis, design of technological process and manufacturing etc, and thereby lead to the reduction of product design period and the quality and reliability improvement of ICE components. So the developing situations of ICE components' 2 D drafting, 3 D modeling of ICE, overall CAD of ICE as well as component design expert system etc. are surveyed, which are the typical applications of computer aided modeling techniques in ICE component design process, and some existent problems and tasks are pointed out so as to make some references for the further research work.展开更多
Experiment on ultrasound- associated extraction of seed oil of Korean pine(Pinus koraiensis) was conducted in Northeast Forestry University, Harbin, China. The factorsaffecting extraction yield, such as ultrasonic fre...Experiment on ultrasound- associated extraction of seed oil of Korean pine(Pinus koraiensis) was conducted in Northeast Forestry University, Harbin, China. The factorsaffecting extraction yield, such as ultrasonic frequency, extracting temperature, extracting timeand the ratio of material to liquid (ratio of Korean pine seed to absolute alcohol), were analyzedunder specific condition and the optimal extracting parameters were obtained as the ultrasonicfrequency 32 000 Hz, the extracting temperature 80 ℃, the extracting time 50 min, and the ratio ofmaterial to liquid 1: 30. The study demonstrates that ultrasound is a reliable and great efficiencytool for the fast extraction of Korean pine seed oil.展开更多
Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning elec...Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTC is evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectron spectroscopy(XPS) to find out the tribological mechanisms between the W film and the two additional additives. The result shows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reduction property, while the anti-wear property is mainly caused by the hard surface of W film.展开更多
文摘Design of internal combustion engine (ICE) components is one of the earliest and also the most active areas in which computer aided modeling techniques are applied. Computer aided modeling techniques could provide requisite information for follow up designing segments such as structural analysis, design of technological process and manufacturing etc, and thereby lead to the reduction of product design period and the quality and reliability improvement of ICE components. So the developing situations of ICE components' 2 D drafting, 3 D modeling of ICE, overall CAD of ICE as well as component design expert system etc. are surveyed, which are the typical applications of computer aided modeling techniques in ICE component design process, and some existent problems and tasks are pointed out so as to make some references for the further research work.
文摘Experiment on ultrasound- associated extraction of seed oil of Korean pine(Pinus koraiensis) was conducted in Northeast Forestry University, Harbin, China. The factorsaffecting extraction yield, such as ultrasonic frequency, extracting temperature, extracting timeand the ratio of material to liquid (ratio of Korean pine seed to absolute alcohol), were analyzedunder specific condition and the optimal extracting parameters were obtained as the ultrasonicfrequency 32 000 Hz, the extracting temperature 80 ℃, the extracting time 50 min, and the ratio ofmaterial to liquid 1: 30. The study demonstrates that ultrasound is a reliable and great efficiencytool for the fast extraction of Korean pine seed oil.
基金the Beijing Natural Science Foundation (3132023)the National Natural Science Foundation of China (51275494 and 51005218)+1 种基金the Fundamental Research Funds for the Central Universities (2652012115 and 2652013081)the Tribology Science Fund of State Key Laboratory of Tribology (SKLTKF13B10) for their financial support to this research
文摘Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTC is evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectron spectroscopy(XPS) to find out the tribological mechanisms between the W film and the two additional additives. The result shows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reduction property, while the anti-wear property is mainly caused by the hard surface of W film.
