pvcs

PVCs and SVCs in Frame Relay Nets

帧中继网中的永久虚拟电路与交换虚拟电路

PVCs save bandwidth associated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time .

PVC在某些虚拟电路必须一直存在的情况下，节省了建立电路和关闭电路带来的带宽开销。

Objective To evaluate the therapeutic effects of modified Roast Radix Glycyrrhizae Decoction on patients with premature ventricular complexes ( PVCs ) .

目的观察加味炙甘草汤治疗室性早搏的临床疗效。

In patients with syndrome of pathogenic heat invading heart ( PHIH ), the PVCs mostly appeared in midday .

邪热犯心证患者，室性早搏多高发于日中时段；

Although the per-unit cost of an SVC is higher than PVCs , if it is used less , the actual cost will be lower .

虽然SVC的单位成本高于PVC，但如果它用得少，实际费用就低。

Upon further study Steelcase found that making TPUs ended up emitting more greenhouse gasses though its manufacturing and lifecycle than PVCs .

然而，Steelcase公司进一步研究后发现，制造TPU最终将排放更多的温室气体，尽管其生产和生命周期比PVC更长。

There are several PVCS students attending , and there will also be PVCS parents there as volunteer camp counselors , so this is a good opportunity !

本校不但有学生参加，更有家长当服务员，机会难得！

Unlike PVCs , with SVCs , users are able to dynamically allocate the virtual circuit between an arbitrary pair of endpoints on a frame relay network .

利用SVC与利用PVC不一样，用户能在帧中继网中任意一对的端点之间动态分配虚拟电路。

Objective To evaluate significance of ST segment elevation on V1 ~ V3 during ventricular premature beats ( PVCS ) in diagnosing Brugada syndrome and foreshadowing cardiac syncope .

目的探讨室性期前收缩V1￣V3导联ST段明显抬高对Brugada综合征的诊断及心源性晕厥的预警意义。

Changes in arrhythmia after the application of IABP frequency or ventricular tachycardia PVCs into sporadic PVCs , ST segment elevation or lower in the 1-2 hours after the return to normal .

心律失常的变化于应用IABP后频发室早或室速转为偶发室早，ST段的抬高或降低在1-2小时后恢复正常。

Objective : To explore the efficiency , safety of radiofrequency catheter ablation ( RFCA ) methods in eliminating frequent premature ventricular contraction ( PVCs ) in severely symptomatic patients with or without PVCs-induced short runs of ventricular tachycardia .

目的：探索导管射频消融治疗严重症状性室性早搏（室早）伴或不伴室早诱发的短阵室性心动过速（室速）的安全性、效率和方法学。

When the furniture maker Steelcase ( SCS ) was looking to replace PVCs , which is a carcinogenic precursor and will off-gas toxins , it turned to a plastic called TPU which was safer and therefore could be upcycled .

当初Steelcase公司寻找一种能够替代PVC（一种可引发致癌隐患、排出有毒气体的材料）的材料时，这家家具制造商选择了一种名为TPU、更加安全、进而可升级回收的塑料。