＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vi...＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vigorous with ramose crown and upright tree gesture. Leaves are elliptic, acuminate, with average 5.802 cm length and 3.389 cm width. Flowers are pale pink. The relative position of petals is overlap. The petal shape is oval with more pollen. The average single fruit weight is 216.0 g, with mainly wide-necked pear formed. The ground color of peel is yellow with 80% bright red of cover color. The flesh is white, melting, soft and juicy, sour-sweet, strongly fragrant, little stone cell and small core. The soluble solid content is 12.5%. The soluble sugar content is 10.78%. The titratable acid content is 0.097%. The fruit quality is excellent. The fruit development period is 125-130 d and the ripe stage is at the end of August in Changli area, Hebei province, It is easy to form flower on short branches, and possesses large number of flower buds. The properties of early-bearing and high yielding are better. It is resistant to fruit phellem, pear scab, cold, etc. The shelf life of fruit is over 20 d. The fruit can be stored for 5 months in refrigeration condition. Suitable cultivation area is Qinhuang- dao,Tangshan, Cangzhou in Hebei, Beijing, Taiyuan in Shanxi and similar area. Xi- anghongli has the high-yield potential and can be extended to the most area of Northern China.展开更多
This paper introduces a launch vehicle scheme for the new generation of cryogenic and quick-launch launch vehicle(LM-6). The main technical innovations of LM-6 launch vehicle include the capability of twenty satellite...This paper introduces a launch vehicle scheme for the new generation of cryogenic and quick-launch launch vehicle(LM-6). The main technical innovations of LM-6 launch vehicle include the capability of twenty satellites launched by one vehicle, high-pressure staged combustion cycle engine and oxygen tank self-pressurization, sandwich bulkhead tank with 200 K temperature difference, and 7-day quick-launch using the "three horizontals" test and launch mode with integral transportation and erection. The future development of the quick-launch launch vehicle is predicted based upon the need for vehicle mission coverage improvement, better response speed, and stronger market competiveness.展开更多
‘Jixiu’is a new early ripening pear variety bred by‘Jimi’בXinhang’,and its fruit quality is excellent.It has performed well in central and southern Hebei.This paper introduces its botanical characteristics...‘Jixiu’is a new early ripening pear variety bred by‘Jimi’בXinhang’,and its fruit quality is excellent.It has performed well in central and southern Hebei.This paper introduces its botanical characteristics,growth phenology,growth and fruiting habits,pollination characteristics and disease resistance in central and southern Hebei.A set of suitable cultivation techniques for Jixiu pear were summarized,including pruning,fruit thinning and bagging,water and fertilizer management,pest and disease control and so on,which provided theoretical support for the popularization and demonstration of this new variety.展开更多
The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting...The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting current Vs. critical current for the cable in conduit conductor (CICC), the first-stage subcable consists of several copper strands twisted around a SC composite one. The copper strand diameter is different from the SC one. Based on Bottura's CICC design approach we take the product of total copper cross-section and wetted perimeter as one of the key design parameters to meet with stability margin requirement. The product reaches 114 cm3 for 15.5 kA TF CICC at operating temperature of 4.2 K and 139 cm3 for 15 kA PF CICC at 3.8 K to obtain stability margins of 280 and 700 mJ/cm3, respectively.展开更多
基金Supported by Changli Comprehensive Station of National Pear Industry Technology System(CARS-29-23)Innovation of Scab-resistant,Strongly-fragrant and Storageresistant Pear Germplasm(16226312D-3)~~
文摘＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vigorous with ramose crown and upright tree gesture. Leaves are elliptic, acuminate, with average 5.802 cm length and 3.389 cm width. Flowers are pale pink. The relative position of petals is overlap. The petal shape is oval with more pollen. The average single fruit weight is 216.0 g, with mainly wide-necked pear formed. The ground color of peel is yellow with 80% bright red of cover color. The flesh is white, melting, soft and juicy, sour-sweet, strongly fragrant, little stone cell and small core. The soluble solid content is 12.5%. The soluble sugar content is 10.78%. The titratable acid content is 0.097%. The fruit quality is excellent. The fruit development period is 125-130 d and the ripe stage is at the end of August in Changli area, Hebei province, It is easy to form flower on short branches, and possesses large number of flower buds. The properties of early-bearing and high yielding are better. It is resistant to fruit phellem, pear scab, cold, etc. The shelf life of fruit is over 20 d. The fruit can be stored for 5 months in refrigeration condition. Suitable cultivation area is Qinhuang- dao,Tangshan, Cangzhou in Hebei, Beijing, Taiyuan in Shanxi and similar area. Xi- anghongli has the high-yield potential and can be extended to the most area of Northern China.
文摘This paper introduces a launch vehicle scheme for the new generation of cryogenic and quick-launch launch vehicle(LM-6). The main technical innovations of LM-6 launch vehicle include the capability of twenty satellites launched by one vehicle, high-pressure staged combustion cycle engine and oxygen tank self-pressurization, sandwich bulkhead tank with 200 K temperature difference, and 7-day quick-launch using the "three horizontals" test and launch mode with integral transportation and erection. The future development of the quick-launch launch vehicle is predicted based upon the need for vehicle mission coverage improvement, better response speed, and stronger market competiveness.
基金Supported by China Agriculture Research System(CARS-28-28)Science and Technology Innovation Project of Hebei Academy of Agricultural and Forestry Sciences(2022KJCXZX-SGS-5)+1 种基金Hebei modern agricultural industrial technology system(HBCT2021210201)Hebei Key R&D Projects(21326308D)。
文摘‘Jixiu’is a new early ripening pear variety bred by‘Jimi’בXinhang’,and its fruit quality is excellent.It has performed well in central and southern Hebei.This paper introduces its botanical characteristics,growth phenology,growth and fruiting habits,pollination characteristics and disease resistance in central and southern Hebei.A set of suitable cultivation techniques for Jixiu pear were summarized,including pruning,fruit thinning and bagging,water and fertilizer management,pest and disease control and so on,which provided theoretical support for the popularization and demonstration of this new variety.
文摘The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting current Vs. critical current for the cable in conduit conductor (CICC), the first-stage subcable consists of several copper strands twisted around a SC composite one. The copper strand diameter is different from the SC one. Based on Bottura's CICC design approach we take the product of total copper cross-section and wetted perimeter as one of the key design parameters to meet with stability margin requirement. The product reaches 114 cm3 for 15.5 kA TF CICC at operating temperature of 4.2 K and 139 cm3 for 15 kA PF CICC at 3.8 K to obtain stability margins of 280 and 700 mJ/cm3, respectively.
