螺旋管

The author Discrete equations are attanied by using Alternating Direction Implic and equations are solved by using Tridiagonal Matrix Algorithm.The velocity and pressure distribution of spiral flow is attained.

本文采用交替方向的隐式格式离散方程，并利用追赶法求解代数方程组，得到了圆管螺旋流速度场、压力场的分布规律。

ObjectiveTo explore the clinical application value of 64-slice spical CT curved multiplanar reformation of the facial nerve canal in cholesteatomtaous tympanitis.

小 目的探讨64层螺旋CT面神经管曲面重组在胆脂瘤型中耳乳突炎中的应用价值。

Currently, our products include Vulcanizer, Galvanized Spiral Gas Drainage Tube, and Vent-pipe, etc, and have formed six series 80 types and more than 200 model products.

目前公司产品已经形成包括：硫化机、螺旋瓦斯抽放管、通风管在内六大系列80个型号的200多个产品系列，产品广泛应用于电力、冶金、矿山、建材、码头、石化等行业，并以过硬的质量和完善的服务深得用户的认可和信赖。

Use a section of 4 PVC waste pipe with a threaded screw-cap fitting on one end and a standard end-cap at the other.

使用一节4 PVC的污水管与螺纹螺旋帽装修一结束就和一个标准的最终上限，在其他。

The structural of mechanism adopted double pipes feed-in with mixing machine, special weighbridge for reducing bond; The hardware circuit make use of the programmable amplifier AD8555 which amplify the weak sensor signal and bridge imbalance compensation and gain error, at the same time,32-bit microprocessor LPC2134 was used as the core of the hardware to deal with the messages and send order to the implement machine. Software design transmits materiel by stages and FIR filter was adopted to remove big errors and enhance precision.

机械结构使用双管螺旋喂料机加搅拌机构，特殊的称斗结构；硬件电路采用数字可编程放大器AD8555作为称重传感器微弱电信号的放大器，以便于补偿桥式传感器的失调和增益误差，同时采用32位单片微处理器LPC2134作为整个电路的处理核心，及时处理称重信息，并向执行机构发送命令；软件根据称重值采取分阶段喂料，并加入了FIR软件滤波，滤除了粗大误差信号，提高了称重精度。

48 cases of cervical spinal stenosis patients to X～ray and CT scan.

对48例颈椎椎管狭窄的病人行X线摄片及螺旋CT扫描。

Plain scan and enhanced scan were performed in these patients with Siemens 64-slice spiral CT with the following parameters: 1.0-mm section thickness,0.6-mm collimation,pitch of 1, voltage of 120Kv and tube current of 100mAs, The scanning range is from the thoracic inlet to posterior costophrenic angle; A 80-100ml dose of nonionic iodinated contrast material is injected intravenously at approximately 4-5 ml/sec.

扫描采用Siemens 64层螺旋CT；扫描参数选择层厚1 mm，准直0.6mm，螺距1，管电压120 kV，电流100 mAs；扫描范围从胸廓上口至后肋膈角；强化时对比剂为非离子型对比剂(碘海醇，350 mg I/ml)，注射流率4～5 ml/s，对比剂总量80～100 ml；采用人工智能触发扫描技术，触发点选择肺动脉主干横断层面，阈值为100 HU，触发扫描延迟时间为6 s。

An experimental study of gas–solid flow around helically finned tube.

气固两相流绕流螺旋翅片管的实验研究，《西安交通大学学报》 2005 年第 11 期

Helically finned tube ; convection heat transfer ; local heat transfer

螺旋肋片管；对流传热；局部传热

Two comparatively parallel copper foil strips surround helically outside the glass discharge tube, acting as preionization electrodes.

在玻璃放电管的外表面螺旋地粘上两条相对平行的金属箔，作为预电离电极。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。