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    • 4. 发明授权
    • Resource release control method, communication system and device
    • 资源释放控制方法,通信系统和设备
    • US08144665B2
    • 2012-03-27
    • US13182274
    • 2011-07-13
    • Weihua HuYanping Zhang
    • Weihua HuYanping Zhang
    • H04W4/00H04W36/00H04J3/16
    • H04W76/062H04W76/32H04W76/38
    • A resource release control method, a communication system, and a device are configured to delete a bearer context on an original-side heterogeneous-system management network element (NE) even if a target-side management NE does not support interaction with a serving gateway (S-GW) and does not support an idle mode signaling reduction (ISR) mechanism. The resource release control method includes: acquiring version information of a target-side management NE, when a user equipment (UE) activating an ISR mechanism is handed over from an original-side network to a target-side network; and deleting a bearer of an original-side heterogeneous-system management NE, if the version information indicates that the target-side management NE does not interact with an S-GW and does not support the ISR mechanism. Meanwhile, a communication system and a relevant device are also provided.
    • 资源释放控制方法,通信系统和设备被配置为即使目标侧管理网元不支持与服务网关的交互来删除原始侧异构系统管理网元(NE)上的承载上下文 (S-GW),不支持空闲模式信令减少(ISR)机制。 所述资源释放控制方法包括:当激活ISR机制的用户设备(UE)从原始侧网络切换到目标侧网络时,获取目标侧管理网元的版本信息; 如果版本信息表示目标侧管理网元不与S-GW交互,不支持ISR机制,则删除原边异构系统管理网元的承载。 同时,还提供通信系统和相关设备。
    • 9. 发明授权
    • Single expander and a cold compressor process to produce oxygen
    • 单一膨胀机和冷压机生产氧气
    • US5901576A
    • 1999-05-11
    • US10966
    • 1998-01-22
    • Rakesh AgrawalDonn Michael HerronYanping Zhang
    • Rakesh AgrawalDonn Michael HerronYanping Zhang
    • F25J3/04F25J3/00
    • F25J3/04351F25J3/04054F25J3/0406F25J3/0409F25J3/04284F25J3/04303F25J3/04412F25J3/04418F25J2200/54F25J2215/50F25J2250/20F25J2250/42F25J2250/52
    • In a process for the cryogenic distillation of air in a distillation column system that contains at least one distillation column wherein the boil-up at the bottom of the distillation column producing the oxygen product is provided by condensing a stream whose nitrogen concentration is equal to or greater than that in the feed air stream, which comprises the steps of: (a) generating work energy which is in excess of the overall refrigeration demand of the distillation column system by at least one of the following three methods: (1) work expanding a first process stream with nitrogen content equal to or greater than that in the feed air and then condensing at least a portion of the expanded stream by latent heat exchange with at least one of the two liquids: (i) a liquid at an intermediate height in the distillation column producing oxygen product and (ii) one of the liquid feeds to this distillation column having an oxygen concentration equal to or preferably greater than the concentration of oxygen in the feed air; (2) condensing at least a second process stream with nitrogen content equal to or greater than that in the feed air by latent heat exchange with at least a portion of an oxygen-enriched liquid stream which has oxygen concentration equal to or preferably greater than the concentration of oxygen in the feed air and which is also at a pressure greater than the pressure of the distillation column producing oxygen product, and after vaporization of at least a portion of oxygen-enriched liquid into a vapor fraction due to latent heat exchange, work expanding at least a portion of the resulting vapor stream; and (3) work expanding a fraction of the feed air; (b) using the work which is generated in excess of the refrigeration need of the distillation column system to cold compress a process stream at a temperature lower than the ambient temperature.
    • 在含有至少一个蒸馏塔的蒸馏塔系统中对空气进行低温蒸馏的方法中,其中产生氧产物的蒸馏塔底部的沸腾是通过将其浓度等于或等于 大于进料空气流,其包括以下步骤:(a)通过以下三种方法中的至少一种产生超过蒸馏塔系统的总体制冷需求的工作能量:(1)工作扩展 氮气含量等于或大于进料空气中的第一工艺流,然后通过与两种液体中的至少一种进行潜热交换来冷凝至少一部分膨胀流:(i)中间高度的液体 在蒸馏塔中生产氧气产物和(ii)到该蒸馏塔的液体进料之一,其氧浓度等于或优选大于浓度 进料空气中的氧气; (2)通过与氧浓度等于或优选大于或等于或等于或等于或等于或等于或等于或等于或等于或等于或等于的氧的富氧液流的至少一部分的潜热交换来冷凝至少等于或大于进料空气中的氮含量的第二工艺流 进料空气中的氧气浓度也大于产生氧气产物的蒸馏塔的压力的压力,并且在至少一部分富氧液体由于潜热换热而蒸发成蒸气馏分之后,工作 膨胀所得蒸气流的至少一部分; 和(3)扩大进料空气的一部分; (b)使用超过蒸馏塔系统的制冷需要产生的作业在低于环境温度的温度下冷却工艺流。