Improved pedestrian detection with peer AdaBoost cascade

Fu, Hongpu; Zou, Beiji; Zhu, Chengzhang; Dai, Yulan; Jiang, Lingzi; Chang, Zhe

doi:10.1007/s11771-020-4448-1

Cited by 8 publications

(8 citation statements)

References 23 publications

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“…Results show that the minimum formation temperature of the fayalite/liquid phase at the atmosphere conditions of CO 20%–CO 2 80%, CO 60%–CO 2 40%, CO 100%–CO 2 0%, and O 2 21%–N 2 79% correspond to 1422.29 K (1149.29 °C), 1425.47 K (1152.47 °C), 1426.97 K (1153.97 °C), and 1664.07 K (1391.07 °C), indicating that the lower the concentration of CO, the more favorable the formation of fayalite at the same temperature. These results are aligned with Fu et al’s findings that some low melting point phases such as Fe 2 SiO 4 –Fe 3 O 4 , Fe 2 SiO 4 –FeO, and Fe 2 SiO 4 are easily formed at the low CO atmosphere during iron ore sintering . Therefore, it is of great importance to control the temperature in the rotary kiln below the liquid phase forming temperature points.…”

Section: Resultssupporting

confidence: 88%

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

Liang

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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With the shortage of high-grade iron ore resources, there is an increasing demand to utilize low-grade iron ores. However, the utilization of refractory low-grade iron ore resources has always been a challenge for the metallurgical industry. In this paper, a novel and green metallurgical technique of highly efficient iron recovery from refractory low-grade iron ores was proposed. A pilot-scale rotary kiln (φ1.5 m × 15 m) research study proved that products with a metallization ratio of 85.15% can be obtained by this low-temperature but rapid reduction process as ore−coal composite was roasted within temperature zone (1173−1264 K) for 24−32 min. Then, 91.75% of iron can be recycled in the form of iron powder (iron grade reached 93.10%), followed by a grinding−magnetic separation process. Compared to the existing processes, this novel process presents advantages of efficient reduction (only 24−32 min for high temperature reduction) and eco-friendliness (energy consumption: 8.98 GJ/t-DRI; CO 2 emission: 800−1100 kg/t-DRI), showing a broad range of application prospects in the resource development and utilization of the same type. To understand this process in depth, in situ dissection research for the pilot-scale rotary kiln reduction process was performed, investigating the temperature field distribution, the iron and silicon minerals transition, and the iron grains formation and growth. A link between materials conversion and external field condition during the rotary kiln reduction course was established, providing technical support for further optimization of this process.

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Section: Resultssupporting

confidence: 88%

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

Liang

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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“…In the tests, increase in the MgO content involved the increasing amounts of dolomite. As more than 50% of the dolomite particles were above 1 mm, increasing dolomite caused a positive effect on granulation by introducing larger particles behaving cores for granules [19]. But to keep basicity stabilizes at 1.8, burnt lime which acts as binder [20] was reduced with increasing dolomite, thus a negative effect on granulation was introduced.…”

Section: Effect Of Mgo Content On Sintering Performancementioning

confidence: 99%

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Shi

Zhu

Pan

et al. 2019

Ironmaking & Steelmaking

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In this paper, the combined effects of MgO and basicity (CaO/SiO 2 ), varied by changing the ratio of dolomite and burnt lime to sinter mix, on sintering of magnetite concentrates were investigated in pilot scale. Mineralogy of sinter with various MgO and basicity was analyzed by light microscope and scanning electron microscope (SEM). The results show that increasing MgO led to lower sinter strength and higher fuel consumption, while increasing basicity behaved in the opposite way. Regardless of MgO content, minimum sinter strength occurred in basicity 1.2-1.6, which should be avoided in sinter production. Less SFCA (silicoferrites of calcium and aluminum) and more magnetite were observed in sinter with higher MgO content. Aside from hematite and magnetite, the dominant phases in sinter with low (0.8) and high (2.2+) basicity were glass and SFCA respectively. Sinter with basicity 1.6 had highest crack density and this would inevitably reduce its cold strength.

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“…However, due to the large number of parameters and difficult to obtain, the practical application of the formula is not extensive. Chinese researchers Quding Zhou and Youduo He put forward a method for calculating the heat balance of sintering bed [5][6][7]. The accumulation of heat quantity was calculated according to the ignition heat, carbon burning heat and carbonate decomposition heat of each layer.…”

Section: Introductionmentioning

confidence: 99%

Optimisation model of fuel distribution in materials bed of iron ore sintering process

Huang

Fan

Chen

et al. 2018

Ironmaking & Steelmaking

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In this study, the optimisation model of fuel distribution base on numerical simulation was proposed to reduce the fuel consumption of sintering process. The simulation model of sintering process was carried out according to the heat and mass transfer, and the physical and chemical reactions of sintering. Then the heat income and expenditure of solid mixture in different materials unit was analysed via the simulation model. And the fuel proportion was adjusted on the basis of the difference between total heat quantity and heat quantity that the materials unit required to reach setting temperature. This model was validated by sintering pot test, the simulation results of bed temperature at different depth were very close to the detection results. The sintering pot test shows that the sinter yield and quality indices had little change after the optimisation of fuel distribution, while the solid fuel consumption was decreased by 3.83 kg t −1 .

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Improved pedestrian detection with peer AdaBoost cascade

Cited by 8 publications

References 23 publications

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Optimisation model of fuel distribution in materials bed of iron ore sintering process

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