The low rate of the electron transfering through the multicrystalline network of a nano-crystalline thin film, and the low efficicency of the dye absorbing the low energy photons are two limiting factors that influence the photoelectric conversion efficiency of the cells.

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Based on the national tenth five magnitude project — Suzhou City Water Environment Improvement and Synthesize Demonstration item, we carried out the static simulation test and the dynamic simulation test under the condition of heavy pollution loading rate and low transparency and dissolved oxygen in polluted river of suzhou ancient city district. These investigations were on the base of the formers' work. We analyzed the purification effects and rules of plant floating-bed technology on polluted river water, and also applied the technology to purify the polluted river water in Miaojia River. Conclusions were summed up in the following:The dominance plant option test was carried out among Oenanthe javanica, Lolium mutliflorum and Allium sativum under low temperature condition. The results showed that the Oenanthe javanica was the dominance floating-bed plant under low temperature condition. Its net removal rate of TN一本到东京、 NH_3-N、 TP中文字幕一区二区久久综合、 COD_ were 51.3%黄视频色网站、 65.2%、 55.6%一级欧美一级日韩一级二级、 57.6%, respectively, and inhibition rate of algae reached 92.3%.

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The calls of non-passerine are some kinds of monotonous dull vocalizations with the characteristics of low and deep frequency, single syllable, low basic frequency and with no ability of modulation in frequency and amplitude. Most of the calls are monotonous and low quality mainly based on the basic song. Compare the vocal of sub-oscine passerine with non-passerine, they have some similar aspects, but the former possesses of stronger capability of vocal control.

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In this thesis we used two types of low-carbon ductile as the basal of low-carbon ductile cast—infiltration, one is as-cast high-toughness pearlitic low-carbon ductile, the other is as-...

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A relative low lake level between 8660～6010 cal.yr BPwas reflected by the clayey silt sediment with the median size less than 25μam and the sandcontent less than 4%,and the Pediastrum concentration was normally low.Between 6010 and2250 cal.yr BP,the median size and sand content increased greatly,and the Pediastrumconcentration raised sharply,suggesting a relative low lake level.After 2250 cal.yr BP,boththe median size and the Pediastrum abundance abruptly declined,suggesting the lake returnedto high level and the climate changed to humid.

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It is possible to produce low-titanium aluminum alloy directly. Three months of periods of industrial test for production low-titanium aluminum alloy was conducted using the 80kA prebake electrolysis cells. The test results showed that the electrolysis cell can work stably, and the effect of TiO2 added into electrolyte on electrolytic process parameters, current efficiency, consumes of materials and energyare trifling. The titanium content in alloys is stable and the absorbility of Ti is high. The microstructure of electrolytic low-titanium aluminum alloy is homogeneous. The grain refinement effect is excellent comparing with that of alloys added titanium by melting Al-Ti master alloys and both alloys have the same grain refinement trend.

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The psychrophilic enzymes is a kind that has high catalyst activety under the condition of low temperature and it is also a very important situation for the low-temperature catalyst to adapt to the low-temperature condition.

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They take the following three forms: a some strive forward to complete their democratization; b some witness failure in democratic elections and recollapse into undemocratic systems; c some get trapped in a low level of balance between low-functioning ruling elites and low-demanding populace.

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