摘要 :
The anntenna area of distributed micosateliites radar system is usually smaller than the minimum SAR antenna area constraint, and there are range-Doppler ambiguities. So one key focus of this signal processing research is to devel...
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The anntenna area of distributed micosateliites radar system is usually smaller than the minimum SAR antenna area constraint, and there are range-Doppler ambiguities. So one key focus of this signal processing research is to develop processing approaches that exploit the added degrees of freedom of a spatially diverse formation to resolve inherent ambiguities of this sparse aperture distributed micosateliites radar system. This paper proposed a Doppler ambiguity resolving method which makes the Doppler ambiguities null in Doppler domain using spatial filter of multiple phase centres.
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Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore ...
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Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore body. Paper used ring-type single-row curtain grouting closed ground plan. This has not only achieved the safety of mining, but also protected ground water resources and hydro-geological environment. Study has shown that: the elevation ofpurdahbase is-96 m ~-568 m, the average drilling depth is 523.92 m, the minimum hole depth is 321 m, and the maximum is 810 m, holes depth greater than 600 m take up about 30.8 A single slurry material can allow seepage gradient and the curtain can withstand the maximum head difference design curtain thickness T ≥ 10 m, grouting hole spacing is designed to 12 m; curtain grouting pressure is 2 times of the head pressure. Research improves reference for similar mines.
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摘要 :
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore ...
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Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore body. Paper used ring-type single-row curtain grouting closed ground plan. This has not only achieved the safety of mining, but also protected ground water resources and hydro-geological environment. Study has shown that: the elevation of purdah base is -96 m ～ -568 m, the average drilling depth is 523.92 m, the minimum hole depth is 321 m, and the maximum is 810 m, holes depth greater than 600 m take up about 30.8 A single slurry material can allow seepage gradient and the curtain can withstand the maximum head difference design curtain thickness T ≥ 10 m, grouting hole spacing is designed to 12 m; curtain grouting pressure is 2 times of the head pressure. Research improves reference for similar mines.
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摘要 :
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore ...
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Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore body. Paper used ring-type single-row curtain grouting closed ground plan. This has not only achieved the safety of mining, but also protected ground water resources and hydro-geological environment. Study has shown that: the elevation of purdah base is -96 m ～ -568 m, the average drilling depth is 523.92 m, the minimum hole depth is 321 m, and the maximum is 810 m, holes depth greater than 600 m take up about 30.8 A single slurry material can allow seepage gradient and the curtain can withstand the maximum head difference design curtain thickness T ≥ 10 m, grouting hole spacing is designed to 12 m; curtain grouting pressure is 2 times of the head pressure. Research improves reference for similar mines.
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摘要 :
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore ...
展开
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore body. Paper used ring-type single-row curtain grouting closed ground plan. This has not only achieved the safety of mining, but also protected ground water resources and hydro-geological environment. Study has shown that: the elevation of purdah base is -96 m ~ -568 m, the average drilling depth is 523.92 m, the minimum hole depth is 321 m, and the maximum is 810 m, holes depth greater than 600 m take up about 30.8 A single slurry material can allow seepage gradient and the curtain can withstand the maximum head difference design curtain thickness T ≥ 10 m, grouting hole spacing is designed to 12 m; curtain grouting pressure is 2 times of the head pressure. Research improves reference for similar mines.
收起
摘要 :
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ...
展开
Problems in Zhong-guan Iron Ore are complicated hydrogeological conditions, larger water inflow in mine ore, all ore bodies buried under the water table, ordovician limestone aquifer in the system directly to the roof for the ore body. Paper used ring-type single-row curtain grouting closed ground plan. This has not only achieved the safety of mining, but also protected ground water resources and hydro-geological environment. Study has shown that: the elevation of purdah base is -96 m ~ -568 m, the average drilling depth is 523.92 m, the minimum hole depth is 321 m, and the maximum is 810 m, holes depth greater than 600 m take up about 30.8 A single slurry material can allow seepage gradient and the curtain can withstand the maximum head difference design curtain thickness T ≥ 10 m, grouting hole spacing is designed to 12 m; curtain grouting pressure is 2 times of the head pressure. Research improves reference for similar mines.
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摘要 :
To directly sample broadband radar signal with high-rate Analog-to-Digital Converter(ADC) suffers from high cost and low sampling precision. In this paper a novel method is presented to sample a wide-band signal with multiple low-...
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To directly sample broadband radar signal with high-rate Analog-to-Digital Converter(ADC) suffers from high cost and low sampling precision. In this paper a novel method is presented to sample a wide-band signal with multiple low-rate ADC channels by using adaptive beamforming technique. This method has the advantages of low cost, low sampling rate, high precision, easy implementation, and it is robust to channel errors. The effectiveness of the proposed approach is verified by simulated data.
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摘要 :
To directly sample broadband radar signal with high-rate Analog-to-Digital Converter(ADC) suffers from high cost and low sampling precision. In this paper a novel method is presented to sample a wide-band signal with multiple low-...
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To directly sample broadband radar signal with high-rate Analog-to-Digital Converter(ADC) suffers from high cost and low sampling precision. In this paper a novel method is presented to sample a wide-band signal with multiple low-rate ADC channels by using adaptive beamforming technique. This method has the advantages of low cost, low sampling rate, high precision, easy implementation, and it is robust to channel errors. The effectiveness of the proposed approach is verified by simulated data.
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摘要 :
In this paper, the problem of joint frequency, direction of arrival (DOA) and range estimation for near-field sources in array signal processing is addressed. Using the state-space realization approach, a subspace based estimation...
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In this paper, the problem of joint frequency, direction of arrival (DOA) and range estimation for near-field sources in array signal processing is addressed. Using the state-space realization approach, a subspace based estimation algorithm is proposed, which does not need any spectral peak searching and the 3-D parameters are automatically paired. Furthermore, the proposed method is applicable to arbitrary additive Gaussian noise environment. The effectiveness of the proposed algorithm is verified via computer simulations.
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摘要 :
In this paper, the problem of joint frequency, direction of arrival (DOA) and range estimation for near-field sources in array signal processing is addressed. Using the state-space realization approach, a subspace based estimation...
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In this paper, the problem of joint frequency, direction of arrival (DOA) and range estimation for near-field sources in array signal processing is addressed. Using the state-space realization approach, a subspace based estimation algorithm is proposed, which does not need any spectral peak searching and the 3-D parameters are automatically paired. Furthermore, the proposed method is applicable to arbitrary additive Gaussian noise environment. The effectiveness of the proposed algorithm is verified via computer simulations.
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