在用循环置换矩阵构造准循环LDPC码时会出现一类无法消除的环，称为平衡环。
QC-LDPC codes constructed by circulant permutation matrices will lead to inevitable cycles, named balanced-cycles.
该方法利用一个短的LDPC码的校验矩阵作为其母矩阵，在此基础上采用循环置换矩阵构造一个长的LDPC码。
The method used a parity-check matrix of a short LDPC code as its mother matrix upon which a long code was constructed with circulant permutation matrices.
国际循环：经皮瓣膜置换，这也是此次ACC讨论的话题么？
International Circulation: it seems with the percutaneous valve replacement its... is that something that is being discussed here at ACC?
对37例心瓣膜置换术后及30例健康人的甲襞微循环进行了对比观察。
Nailfold microcirculation for 37 rheumatic mitral stenosis patients after valve replacement were observed and compared with 30 normal persons.
目的探讨超滤在瓣膜置换术患者体外循环中应用的效果。
AIM To investigate the effect of ultrafiltration in cardiopulmonary bypass in valve replacement patients.
目的：评价在浅低温体外循环心脏跳动中巨大心脏病人二尖瓣置换术的远期疗效。
Objective:To evaluate the long-term outcome of mitral valve replacement with giant heart under shallow low temperature cardiopulmonary bypass in beating heart.
体外循环手术后瓣膜置换手术患者咽部菌群明显变化，这种变化的机制及临床意义值得进一步研究。
Post CPB there were obvious changes of throat flora in patients with prosthetic value replacement. It is needed to study further for mechanisms and significance of the changes.
目的观察体外循环(CPB)心脏瓣膜置换手术中使用大剂量抑肽酶对心肌的保护作用。
Objective To investigate the myocardial protective effects of large dose of aprotinin on myocardium during cardiac valvular replacement operation under cardiopulmonary bypass (CPB).
目的回顾性总结主动脉瓣和二尖瓣联合瓣膜置换术的体外循环经验。
OBJECTIVE To summarize the clinical experience of cardiopulmonary bypass in double valve replacement.
目的观察参附注射液(SFI)预处理及后处理对体外循环心脏瓣膜置换术后患者认知功能的影响。
Objective To investigate the effects of preconditioning and postconditioning with Shenfu Injection (SFI) on cognitive function in patients after valve replacement under extra-corporeal circulation.
最后针对分析结果，提出通过土地置换、清洁生产、循环旅游等措施改善景区的旅游环境。
Based on the analysis, to improve the tourism environment of the area, some measures are proposed, such as land exchange, cleaner production, and circular tourism and so on.
置换后草酸溶液循环使用，降低了成本。
The oxalic acid solution can be re-used through displacement for reducing the cost.
本文还通过在改良土中置换一定比例的砂土来改善土料的颗粒级配，以降低循环失水对水泥土强度的影响。
The authors also try to improve grain composition of soil by replacing cement soil with some sand to reduce influence of environmental change to strength of cement improved soil.
大容量循环流化床锅炉通常采用外置换热器来调节炉膛温度和工质温度。
External heat exchanger is generally used in large-scale circulating fluidized bed boiler to adjust furnace temperature and working material temperature.
方法1996年1月至2005年12月，561例二尖瓣再狭窄患者接受瓣膜置换，年龄27～70岁。手术均在全身麻醉、低温、体外循环下进行。
Methods From 1996.1 to 2005.12, valve replacement were performed in 561 patients with mitral valve restenosis (age from 27 to 70), under general anesthesia and hypothermic CPB.
结论髋关节假体置换术可引起骨髓脂肪入侵血液循环并导致血小板激活。
Conclusions Hip prosthesis can cause intravasation of bone marrow fat that leads to platelet activation.
结合燃气蒸汽联合循环技术，实现能量的梯级利用，构成新型化学链置换燃烧联合循环，高效发电同时分离CO2。
Combined with the technology of gas turbine and steam turbine, a high-efficiency cycle with CO2 separation is formed.
目的探讨主动脉瓣膜置换术的麻醉及体外循环管理效果。
Objective To explore the clinical management effect of anaesthesia and extracorporeal circulation in valve replacement of heart aorta.
对COD废液中的硫酸银，采用铁线置换法回收金属银，进行循环使用，降低了分析费用，减小了环境污染。
Iron line replacement method is used to recovery metal silver from silver sulfate in COD waste liquid, and it is reused to analyze, so analysis cost and environment pollution are decreased.
该发明用于体外循环，辅助循环和人工心脏置换。
The present invention is used in extracorporeal circulation, auxiliary circulation and artificial heart replacement.
作为置换剂起头向下移动的活塞继续走高以及冷气体转移到汽缸热端以及循环再次起头。
As the displacer begins to move down the piston continues to move up and the cold gas is transferred to the hot end of the cylinder and the cycle starts again.
目的探讨浅低温体外循环心脏跳动中二尖瓣置换术(MVR)对机体免疫功能的影响。
OBJECTIVE To evaluate the effects of beating heart mitral valve replacement (MVR) with mild hypothermia extracorporeal circulation (ECC) on immune functions.
目的观察中低温体外循环中瓣膜置换患者的脑氧代谢及脑糖、脑乳酸的变化。
Objective To observe the changes of metabolism of cerebral oxygen, glucose and lactate during moderate and hypothermic cardiopulmonary bypass(CPB)in cardiac valve replacement surgery.
结论再灌注前及再灌注早期循环血白细胞过滤可明显改善心瓣膜置换术患者术后肺功能。
CONCLUSION Leukocyte depletion filtration short time before and during the period of reperfusion significantly improved the lung function in the patients undergoing valve surgery.
目的：探讨体外循环（CPB）期间含氧血持续肺动脉灌注对心脏瓣膜置换患者的肺保护作用。
Objective To determine the lung protection of continuous pulmonary artery perfusion with oxygenated blood during cardiopulmonary bypass (CPB).
目的：探讨体外循环（CPB）期间含氧血持续肺动脉灌注对心脏瓣膜置换患者的肺保护作用。
Objective To determine the lung protection of continuous pulmonary artery perfusion with oxygenated blood during cardiopulmonary bypass (CPB).
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