脉管

The1Hz~lMHz input measured pulse signals of the digital frequency meter can be used for measuring frequency, period, pulse width and duty ratio,etc.The test results stably display 3 seven-segment numeric tubes, and the measuring ranges may be switched over automatically. The measuring error is equal to or less than 0.1％.

该数字频率计的lHz～1MHz输入被测脉冲信号具有频率测量、周期测量、脉宽测量和占空比测量等多种用途；其测试结果由3只七段数码管稳定显示，测试量程可自动切换、测量误差小于等于0.1％。

The intelligence motor soft starters partial hardware electric circuit has designed mainly includes the electric current, the voltage examination module, the crystal thyratron triggers and the pulse width enlargement electric circuit module, the numeral keyboard entry and the liquid crystal display output module.

设计了智能型电机软起动器的部分硬件电路，主要包括有电流、电压检测模块、晶闸管的触发及脉宽放大电路模块、数字键盘输入及液晶显示输出模块。

The composition voltage, the electric current double closed loop voltage-stabilized source, used the integrated phase shifting crystal thyratron module to do for the electrical energy transformation component, in detail has calculated the rectification main circuit main component parameter; In the pulse-duration modulation part, used the special-purpose integrated circuit to realize the frequency modulation to adjust the pressure, did take IGBT as the power transformation component, realized the output voltage frequency modulation to adjust the pressure, and has calculated the related parameter.

在调压稳压电压源设计中采用二阶工程设计法设计了电压和电流调节器，组成电压、电流双闭环稳压电源，采用集成移相晶闸管模块做为电能变换器件，详细计算了整流主电路主要器件的参数；在脉宽调制部分，采用专用集成电路实现了调频调压，以 IGBT 做为功率变换器件，实现了输出电压的调频调压，并计算了有关参数。

Buck and Boost topology switching power conversion circuits as the core of this system, ultra low power MSP430F1222 microcontroller-based controller, microcontroller produced by the PWM pulse width modulation signals, respectively, two-way control switch voltage conversion circuit the turn-on and turn-off in order to achieve the above two kinds of topology switching power conversion circuit, and then to draw power from the flow of electrical energy has been filled into the rechargeable battery, and using microcontroller A / D input voltage implementation of the monitoring, according to the input voltage switching buck - circuit at a lower cost to achieve a highly efficient energy transfer, and the circuit is simple, the parameter to determine easy, self-low power consumption,to achieve full-featured.

本系统以Buck降压和Boost升压拓扑结构开关电源变换电路为核心，以超低功耗单片机MSP430F1222为主控器，由单片机产生PWM脉宽调制信号，分别控制两路电压变换电路中开关管的导通与关断从而实现以上两种拓扑结构开关电源变换电路，进而从一直流电源中吸取电能充入可充电电池，并利用单片机A/D对输入电压实施监测，根据输入电压切换升降压电路，以较低的成本实现了高效率的电能转移，并且电路简单、参数确定容易，自身功耗低，实现功能完整。

The method avoids that hole of taking pressure is blocked by used average-velocity tube to measure unpurged one phase fluid in the big pipe.

中文摘要：介绍了在非洁净单相流体中，利用流体紊流产生的压力脉动随机信号作为相关测量信号源进行流量测量；避免大口径管道采用均速管测量非洁净流体时，取压孔被堵塞问题。

Despite this, he was thought to be untouchable in Nigeria because of his political connections.

此外，由于他在政界人脉极广，因此他被认为是尼日利亚无人敢管的人。

Two special configurations were found to be advantageous in establishing and maintaining reliable circulation of the working fluid.

并将纳米流体作为工质引入到脉动热管领域，对纳米流体强化换热的作用进行了分析研究。

Calyx ovoid in flower, suberect or declinate; teeth 5, posterior 1 widest, lateral teeth separate or adnate to posterior tooth forming upper lip; anterior teeth 2, separate or connate, forming lower lip; fruiting calyx tubular, veins elevated, teeth bright colored.

花萼卵形体在花中，近直立或；第5齿状物，后面1宽，侧的齿分开或贴生于后唇瓣齿；前面切成齿形2，分开或，形成下唇；管状的果期花萼，脉隆起，鲜艳的齿。

With the success of orthotopic liver transplantation,pulmonary vascular abnormality of hepatopath in its advanced stage is attracting more and attention.in which hepatopulmonary syndromeand portopulmonary hypertension are the most important.

随着原位肝移植的成功，晚期肝病患者的肺管异常越来越受到关注，以肝肺综合征和门脉性肺动脉高压最为重要。

CT Findings were as follows : pancreas enlargement in 24 cases , focal and diffused hypodense in 39 cases , hemorrhage and necrosis of pancreas in 3 cases, peripancreatic effusion in 39 cases , prerenal fascia thickening in 39 cases , pleural effusion in 24 cases , with thrombosis in portal and SMV in 1 case . A case of pancreas head enlargement misdiagnosed for tumor,a case pancreatitis effusion was through superficial inguinal canal into scrotum.

CT影像学征象如下：胰腺体积增大24例；局限性及弥漫性密度减低39例；胰体及尾部出血坏死3例；胰周间隙渗出39例；肾旁筋膜增厚及脾肾间隙模糊39例，特别是左侧肾前筋膜均累及；少量胸腔积液24例；出血性胰腺炎伴门脉及肠系膜上静脉血栓1例；炎性渗出物通过腹股沟管蔓延到阴囊1例；单纯胰头增大，误诊为胰头肿瘤1例；本组40例中合并胆石12例。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。