Problems existing in the road landscape design of newly-developed urban districts in China were analyzed,and improvement strategies proposed.By taking the City-West Harbor District in Jiujiang City for an example,road...Problems existing in the road landscape design of newly-developed urban districts in China were analyzed,and improvement strategies proposed.By taking the City-West Harbor District in Jiujiang City for an example,road landscape designs for such newly-developed urban districts were further studied.展开更多
The synthetical soft magnetic properties including d.c. and a.c. magnetic properties and pulse magnetic property are reported for a newly-developed nanocrystalline Fe73.5Cu1 Nb1.5V1.5Si13.5B9 alloy The new alloy posse...The synthetical soft magnetic properties including d.c. and a.c. magnetic properties and pulse magnetic property are reported for a newly-developed nanocrystalline Fe73.5Cu1 Nb1.5V1.5Si13.5B9 alloy The new alloy possesses high d.c. relative initial permeability of 12.5×104 and low coerciv ity of 0.54 A/m. Under the conditions of Bm=0.3 T, f=100 kHz and Bm=0.2 T, f=200 kHz the core losses of the new alloy are 543 kW·m-3 and 834 kW.m-3, respectively which can be compa rable with those of nanocrystalline Fe73.5Cu1Nb3Si13.5B9 alloy. The analyses of core losses have been carried out in the wider range of f=20～104 kHz and Bm=0.0025～0.8 T and the approxi mate expression P(kW·m-3)=1.803 B:f1.77 has been obtained. The analyses of core losses in the range of f=20～104 kHz and Bmf=(10～40)×103(T.Hz) have shown that the core loss and the corresponding amplitude permeability roughly vary as P = 2.347×10-6(Bmf)1.97f-0.2231 and μa = 9.56× 105f-0.7464, respectively for the given product B.f. Some practical applica tions have also been mentioned.展开更多
A newly developed energy source basein China,Huaibei City,is located inthe northern part of Anhui Province,under the direct control of the provincialgovernment.Under its jurisdiction,there arethree districts and one c...A newly developed energy source basein China,Huaibei City,is located inthe northern part of Anhui Province,under the direct control of the provincialgovernment.Under its jurisdiction,there arethree districts and one county,covering atotal area of 2725 sq km and with a populationof 1.8 million. The city boasts unique mineralresources.A total of 13 minerals have beensurveyed,including coal,iron and kaoline.The reserves of coal,the richest of all,areestimated at about 10 billion tons and theprospective reserves 35 billion tons.Basedon its coal resources,the city has set up 24pairs of large and modern mines with anannual production capacity of 20 milliontons,ranking fifth in the country.The展开更多
文摘Problems existing in the road landscape design of newly-developed urban districts in China were analyzed,and improvement strategies proposed.By taking the City-West Harbor District in Jiujiang City for an example,road landscape designs for such newly-developed urban districts were further studied.
文摘The synthetical soft magnetic properties including d.c. and a.c. magnetic properties and pulse magnetic property are reported for a newly-developed nanocrystalline Fe73.5Cu1 Nb1.5V1.5Si13.5B9 alloy The new alloy possesses high d.c. relative initial permeability of 12.5×104 and low coerciv ity of 0.54 A/m. Under the conditions of Bm=0.3 T, f=100 kHz and Bm=0.2 T, f=200 kHz the core losses of the new alloy are 543 kW·m-3 and 834 kW.m-3, respectively which can be compa rable with those of nanocrystalline Fe73.5Cu1Nb3Si13.5B9 alloy. The analyses of core losses have been carried out in the wider range of f=20～104 kHz and Bm=0.0025～0.8 T and the approxi mate expression P(kW·m-3)=1.803 B:f1.77 has been obtained. The analyses of core losses in the range of f=20～104 kHz and Bmf=(10～40)×103(T.Hz) have shown that the core loss and the corresponding amplitude permeability roughly vary as P = 2.347×10-6(Bmf)1.97f-0.2231 and μa = 9.56× 105f-0.7464, respectively for the given product B.f. Some practical applica tions have also been mentioned.
文摘A newly developed energy source basein China,Huaibei City,is located inthe northern part of Anhui Province,under the direct control of the provincialgovernment.Under its jurisdiction,there arethree districts and one county,covering atotal area of 2725 sq km and with a populationof 1.8 million. The city boasts unique mineralresources.A total of 13 minerals have beensurveyed,including coal,iron and kaoline.The reserves of coal,the richest of all,areestimated at about 10 billion tons and theprospective reserves 35 billion tons.Basedon its coal resources,the city has set up 24pairs of large and modern mines with anannual production capacity of 20 milliontons,ranking fifth in the country.The
