一种通用型喷油器的改进设计

本文介绍了一种通用型喷油器总成的改进与应用。通过产品的批量生产和在发动机上的试验验证,改进后的喷油器可以与改进前的喷油器互换,其产品具有良好的通用性,达到了节约成本、宜批量组织生产的目的。     

利用CF4等离子体制作高开口率TFT-LCD

为了获得高的开口率,有必要优化设计参数和工艺容差。通常的过孔刻蚀工艺采用SF6基气体进行刻蚀,但是这种方法在金属和钝化层之间的选择性太小,因此,必须增加过孔的尺寸才行。为了克服上述问题,在本研究中用CF4气体代替SF6气体进行刻蚀,结果在FFS 5 .16(2 .03 in)像素结构中,开口率提高了60 %。     

获得精细通孔图形的光刻技术改进

为了获得更高性能的TFT-LCD面板,在光刻时保证精细的图形成像十分重要,其中,如何制作出尺寸更小的通孔图形是主要的问题之一。本文提供的研究中,我们只简单地改变了一下烘烤工艺,而不需要改变Eop和显影时间,就可以将通孔图形的尺寸减小20 %~25 %。在后续的刻蚀工艺中,通孔的尺寸能显著减小。     

Fuzzy successive modelling and control for time-delay systems

In this paper, a procedure for constructing a fuzzy model of a given system associated with a digital fuzzy filter is proposed. Based on the structure of the Smith predictor, a hybrid model predictive control approach is also presented. Two experimental results using (1) an analogue simulator and (2) a blower temperature control rig have been illustrated. It shows that the proposed control structure is a feasible approach to control systems with time-delay.     

关于锅炉"四管"漏泄的综合治理

锅炉“四管”漏泄一直是造成工厂非计划停机的主要因素，据统计，自1999年至2001年三年间，因锅炉“四管”漏泄造成的非计划停运占总非计划停运的51．7％，通过对近三年来锅炉漏泄的原因分析和统计，提出了相应的对策和措施，以期通过治理，大幅度降低因锅炉“四管”漏泄造成的非计划停运次数，提高机组运行的可靠性。     

Signal processing for real-time identification of similar metals by laser-induced breakdown spectroscopy

Laser-induced breakdown spectroscopy(LIBS) is regarded as a promising technique for realtime sorting of scrap metals due to its capability of fast multi-elemental and in-air analysis. This work reports a method for signal processing which ensures high accuracy and high speed during similar metal sorting by LIBS. Similar metals such as aluminum alloys or stainless steel are characterized by nearly the same constituent elements with slight variations in elemental concentration depending on metal type. In the proposed method, the original data matrix is substantially reduced for fast processing by selecting new input variables(spectral lines) using the information for the constituent elements of similar metals. Specifically, principal component analysis(PCA) of full-spectra LIBS data was performed and then, based on the loading plots, the input variables of greater significance were selected in the order of higher weights for each constituent element. The results for the classification test with aluminum alloy, copper alloy,stainless steel and cast steel showed that the classification accuracy of the proposed method was nearly the same as that of full-spectra PCA, but the computation time was reduced by a factor of 20 or more. The results demonstrated that incorporating the information for constituent elements can significantly accelerate classification speed without loss of accuracy.     

Dielectric and Electrostrictive Properties of Ferroelectric Relaxors in the System Pb(Mg1/3Nb2/3)O3:PbTiO3: Ba(Zn1/3Nb2/3)O3

Ceramic dielectrics which have been fabricated in the Pb(Mg_1/3 Nb_2/3)O₃:PbTiO₃:Ba(Zn_1/3Nb_2/3)O₃ composition system are shown to exhibit two distinct dielectric maxima, both of which show the characteristic loss spectra of ferroelectrics with diffuse phase transitions. The height of the individual maxima can be controlled by the Zn:Mg ratio in the starting material and, in suitably chosen compositions, a wide range of almost temperature-independent high dielectric permittivity is possible. These dielectrics show strong electrostrictive deformations under high electric fields but the electrostrictive strain is much less temperature-sensitive than in other relaxors.     

经济全球化背景下房地产专业人才培养模式的变革

通过分析经济全球化背景下房地产行业的发展特点,提出房地产专业人才培养模式变革的必要性,并且从正确认识和确立房地产的专业地位、建立房地产专业人才培养的层次性观念、重新设置课程体系以及丰富人才培养方式等几个方面指明了改革的方向。     

PHYSICOCHEMICAL, TEXTURAL AND NOODLE-MAKING PROPERTIES OF WHEAT DOUGH CONTAINING ALGINATE

The effects of the addition of alginate on the physicochemical, rheological and noodle-making properties of wheat flour were studied. The hydration properties (water absorption index, water solubility and swelling power) of wheat flour increased with increasing levels of alginate due to its high affinity to water. The addition of alginate caused increased water absorption and dough development time in the farinogram while the tolerance of dough to mixing was reduced. Also, the syneresis of the wheat flour gel was significantly reduced during freeze-thaw treatments when prepared with alginate. With the addition of alginate, the noodles exhibited an increase in the cooked weight and a decrease in the cooking loss. Moreover, the addition of alginate led to significant increases in the cutting and tensile forces of the noodles. In addition, the noodles containing more alginate exhibited lower lightness and redness, while yellowness was increased.

PRACTICAL APPLICATIONS

The purposes of this study are to examine the effects of alginate on the physicochemical and rheological properties of wheat flour dough and to evaluate its performance in noodle-making.
This study demonstrates that alginate can be used as a food additive to control and modify the rheology and texture of wheat flour products.