In the context of 4G wireless mobile systems with direct conversion receivers, an new algorithm for carrier frequency offset (CFO) and IQ-imbalance estimation and compensation at the receiver is proposed. All processi...
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In the context of 4G wireless mobile systems with direct conversion receivers, an new algorithm for carrier frequency offset (CFO) and IQ-imbalance estimation and compensation at the receiver is proposed. All processing for estimation and compensation of both CFO and IQ-imbalance is done in the time domain. Because the CFO is estimated while taking into account the presence of IQ-imbalance, a very precise estimate of the CFO can be obtained, even in the presence of large IQ-imbalance. The algorithm uses a repetitive low peak-to-average preamble sequence. At the transmitter, in order to improve the estimation result, an artificial CFO is digitally super-imposed on a part of the preamble sequence. The new algorithm yields better results than existing CFO estimation algorithms for SNRs where the IQ imbalance is dominant over the Gaussian noise. The structure of the preamble also allows an effective IQ-imbalance estimation.
This paper presents a new type of jet aerator, which is designed by means of the application of CFD (PHOENICS 3.5.1) numerical simulation, and a series of experiments have been conducted. The experiment results reveal...
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A new acrylic ester polymer YWB-7 resin was prepared and characterized. The properties of YWB-7 resin were compared with those of the commercial Amberlite XAD-7, Diaion HP2MG and hypercrosslinked macroporous polymer N...
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A new acrylic ester polymer YWB-7 resin was prepared and characterized. The properties of YWB-7 resin were compared with those of the commercial Amberlite XAD-7, Diaion HP2MG and hypercrosslinked macroporous polymer NDA-150 resins. Both surface area and micropore area of YWB-7 resin were bigger than those of XAD-7 resin and HP2MG resin. The YWB-7 resin was successfully employed to recycle 5-sodiosulfoisophthalic acids （SIPA） from its solutions with and without methanol.
Phenol and cresols are common toxic environmental pollutants. In this study, the micronucleus assay and the alkaline single cell gel electrophoresis (SCGE) technique have been used to investigate the genotoxic activit...
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The biodegradation and toxicity of the purified terephthalic acid（PTA） processing wastewater was researched at NJYZ pilot with the fusant strain Fhhh in the carrier activated sludge process（ CASP）. Sludge loading ...
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The biodegradation and toxicity of the purified terephthalic acid（PTA） processing wastewater was researched at NJYZ pilot with the fusant strain Fhhh in the carrier activated sludge process（ CASP）. Sludge loading rate（SLR） for Fhhh to COD of the wastewater was 1.09 d^-1 and to PTA in the wastewater was 0.29 d^-1. The results of bioassay at the pilot and calculation with software Ebis3 showed that the 48h-LC50 （median lethal concentration） to Daphnia magna for the PTA concentration in the wastewater was only 1/10 of that for the chemical PTA. There were .5 kinds of benzoate pollutants and their toxicities existing in the wastewater at least. The toxicity parameter value of the pure chemical PTA cannot be used to predicate the PTA wastewater toxicity. The toxicity of the NJYZ PTA wastewater will be discussed in detail in this paper.
Carbonaceous adsorbents (CA) were prepared by carbonizing waste cation-exchange resins in different temperature and followed by CO2 activation. The results of elementary analysis and FT-IR indicated sulfonic groups in...
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Carbonaceous adsorbents (CA) were prepared by carbonizing waste cation-exchange resins in different temperature and followed by CO2 activation. The results of elementary analysis and FT-IR indicated sulfonic groups in resins inner surface were almost decomposed to heat-resistant sulfone groups after pyrolysis. The BET surface area of CA could achieve 340.1 m2/g. Also, the study of adsorbing phenol in aqueous was carried out. The result showed the adsorption capacity for phenol was about 57.60 mg/g, and there was a good linear correspondence between the adsorption capacity for phenol and BET surface area;in the concentration of phenol ranged from 25.5 mg/L to 600.0 mg/L, adsorption isotherm could be fitted well into Langmuir equation.
Focusing on the region of Yarlung Zangbo River and the middle reaches of its two tributaries of Nianchu River and Lhasa River in Tibet (Hereafter referred to as the One River and Two Tributaries region), and based on ...
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Focusing on the region of Yarlung Zangbo River and the middle reaches of its two tributaries of Nianchu River and Lhasa River in Tibet (Hereafter referred to as the One River and Two Tributaries region), and based on the data from China 3rd, 4th and 5th population censuses, the article has analyzed change patterns of this region's labor force. Major findings from the study are summarized as follows: (1) Compared with the data from the 3rd census, labor force population in 2000 has increased significantly. (2) Children dependency coefficient has dropped, while old people dependency coefficient has changed very slightly with an increase of 0.047% only. (3) Compared 2000 with 1982, illiteracy and semi-illiteracy rate of the population above 15 years old have decreased significantly by 30.69 percentage points, but still higher than the national average. (4) Women's illiteracy rate has dropped faster than men's, but up to 2000 it was generally quite high. The upgrading of the entire population's overall quality has a long way to go.
Nowadays soils of most part of the world have been seriously polluted by heavy metals and organic *** soils have caused a lot of problems,such as underground water pollution,ecosystem damage,environment deterioration,...
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Nowadays soils of most part of the world have been seriously polluted by heavy metals and organic *** soils have caused a lot of problems,such as underground water pollution,ecosystem damage,environment deterioration,and so *** the progress of
In this paper, a practical and operative method is presented for water quality classification in Lake Tai using multi-spectral remote sensing data. The remote sensing models of chlorophyll-a and suspended sediments ar...
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In this paper, a practical and operative method is presented for water quality classification in Lake Tai using multi-spectral remote sensing data. The remote sensing models of chlorophyll-a and suspended sediments are developed by integration of Landsat5 TM images and in situ measurements in the period of from year 2003 to 2004. The key issues in applying multi-spectral satellite imagery to water quality are first given, including radiation calibration, geometric correction, atmospheric correction, noise elimination by spatial filtering and the spectral reflectance obtain. The multi-spectral band analysis is further studied to determine the relations between various bands emissivity, the emissivity combination and the water quality parameters. The regression models for chlorophyll-a and suspended sediments are derived, and the accuracies and correlation coefficients of the models are analyzed. The water quality parameters obtained from the regression models are tested with the in situ measurements, which proves the uniformity between these two results. This means the feasibility of the multi-spectral remote sensing data for monitoring the water quality in Lake Tai.
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