管

Maffei Corporation PVC-U drainage pipes to the production line, the German company Barton Rumsfeld plastic production line and the Hong Kong Chen Hsong injection molding machine and other advanced production equipment, use of hi-tech means of production "Jinde" brand aluminum PAP composite pipe, PPR aluminum-plastic tube, PE-X cross-linked polyethylene pipe, PE-RT polyethylene pipe temperature, PPR plastic pipes, PE gas pipe, PE water pipe, PE mining pipe, HDPE large caliber double-wall corrugated pipe, HDPE Large Diameter Winding Pipe, PVC-U new composite pipes, PVC-U to the water pipes, cable sheathing, etc., and be compatible with the brass pieces, PPR pipe fittings, PE-RT pipe, PE water supply pipe pieces, PE gas pipe pieces, PE mining pipe pieces, PVC pipe fittings and the corresponding installation tools.

玛菲公司PVC-U给排水管生产线、德国巴顿菲尔德公司全塑生产线及香港震雄注塑机等先进生产设备，采用高科技手段生产"金德"牌PAP铝塑复合管，PPR铝塑管、PE-X交联聚乙烯管、PE—RT耐高温聚乙烯管、PPR全塑管、PE燃气管、PE给水管、PE矿用管、HDPE大口径双壁波纹管、HDPE大口径缠绕管、PVC—U新型复合排水管、PVC—U给水管、电缆护套管等和与之配套的铜管件、PPR管件、PE—RT管件、PE给水管管件、PE燃气管管件、PE矿用管管件、PVC管件及相应的安装工具等。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

The thickness of the inner wall was (0.68±0.46) mm. It showed no significant difference between the two sides of the optic canal in diameters(P＞0.05).(2)The optic canal, the superior orbital fissure and the inferior orbital fissure were respectively shown as track, crack and gorge type in CT axial pictures, while in the coronal pictures, they were respectively shown as butterfly eyes, horizontal fissure and vertical fissure type.(3)The relationship of the posterior ethmoid sinus and the optic canal was: anterocanal(42.00%), semicanal(27.5%), whole-canal(18.75%),sella turcica(9.75%) and circumcanal(2.00%).(4)The relationship of the position of the sphenoidal sinus and the optic canal was:Ι degree sphenoidal sinus(20%),Π degree (63%) and Ш degree (17%).

双侧间差异均无显著性（P＞0.05）；②视神经管、眶上裂、眶下裂在CT轴位像上分别表现为&轨道状&、&裂隙状&和&狭谷状&，在冠状位像上分别表现为&蝶眼状&、水平状裂隙和垂直状裂隙；③后组筛窦与视神经管的位置关系为：管前型占42.00%、半管型占27.50%、全管型占18.75%、蝶鞍型占9.75%和管周型占2.00%；④蝶窦气化度与视神经管的位置关系为：Ι度蝶窦占20%、Π度蝶窦占63%和Ш度蝶窦占17%；⑤视神经管内侧壁骨质缺损发生率为25.5%，缺损平均长度为(5.07±2.52)mm。

Tubes can be cuffed or uncuffed. Cuffed tubes are appropriate for adults andolder children. Uncuffed tubes are used for younger patients (those requiring atube smaller than 5.5 mm).1,2 After inserting a cuffed tube, you must inflate theballoon on the distal end to create a seal between the tube and the tracheal lumen.This seal will prevent leakage of air and aspiration of gastric contents.

可以使用有套囊的插管或无套囊的插管，有套囊的插管适用于成人或年长儿无套囊的插管，无套囊的插管则用于年幼儿（插管直径小于5.5 mm）插入有套囊的插管后，应注入气体使套囊膨胀，封闭气管和插管之间的腔隙，这可以避免漏气及胃内容物的吸入。

This article, based on key technique and different objective conditions in terms of geography and geology, such as soft soils, shallow water, and heavy sludge seen in ChangHong tunnel, presents features of key construction technique in ChangHong Project, such as slope stability and bottom settlement control in dry dock, cracks control and freeboard control technique respectively for element fabrication, pile foundation construction, and piles-tube connection technique, such technique like, sludge cleanup in immersion trench, and element sinking/positioning technique together with element joint (including connection to abutment and final joint).

文章根据沉管隧道工程建设的关键技术和宁波常洪隧道工程土软、水浅、淤重等客观地质地理环境条件，介绍了宁波常洪沉管隧道工程的施工技术特点，如干坞边坡稳定和管底基础变形的控制技术、本体防水混凝土管段制作的裂缝和干舷控制技术、管段江中桩基基础的施工和其与管底连接的技术工艺、管段基槽清淤和沉放定位施工技术，以及管段接头连接（包括与岸边段的连接和最终接头）的施工技术等。

This article, based on key technique and different objective conditions in terms of geography and geology, such as soft soils, shallow water, and heavy sludge seen in ChangHong tunnel, presents features of key construction technique in ChangHong Project, such as slope stability and bottom settlement control in dry dock, cracks control and freeboard control technique respectively for element fabrication, pile foundation construction, and piles-tube connection technique, such technique like, sludge cleanup in immersion trench, and element sinking/positioning technique together with element joint (including connection to abutment and final joint).

本文根据沉管隧道工程建设的关键技术和宁波常洪隧道工程土软、水浅、淤重等客观地质地理环境条件，介绍了沉管隧道工程的施工技术特点，如干坞边坡稳定和管底基础变形的控制技术、本体防水混凝土管段制作的裂缝和干舷控制技术、管段江中桩基基础的施工和其与管底连接的技术工艺、管段基槽清淤和沉放定位施工技术，以及管段接头连接（包括与岸边段的连接和最终接头）的施工技术等。

This article, based on key technique and different objective conditions in terms of geography and geology, such as soft soils, shallow water, and heavy sludge seen in ChangHong tunnel, presents features of key construction technique in ChangHong Project, such as slope stability and bottom settlement control in dry dock, cracks control and freeboard control technique respectively for element fabrication, pile foundation construction, and piles-tube connection technique, such technique like, sludge cleanup in immersion trench, and element sinking/positioning technique together with element joint (including connection to abutment and final joint).

本文根据沉管隧道工程建设的关键技术和宁波常洪隧道工程土软、水浅、淤重等客观地质地理环境条件，介绍了沉管隧道工程的施工技术特点，如干坞边坡稳定和管底基础变形的控制技术、本体防水混凝土管段制作的裂缝和干舷控制技术、管段江中桩基基础的施工和其与管底连接的技术工艺、管段基槽清淤和沉放定位施工技术，以及管段接头连接（包括与岸边段的连接和最终接头）的施工技术等。中国诺宇综合网http：//www.siaaa.com

This article, based on key technique and different objective conditions in terms of geography and geology, such as soft soils, shallow water, and heavy sludge seen in ChangHong tunnel, presents features of key construction technique in ChangHong Project, such as slope stability and bottom settlement control in dry dock, cracks control and freeboard control technique respectively for element fabrication, pile foundation construction, and piles-tube connection technique, such technique like, sludge cleanup in immersion trench, and element sinking/positioning technique together with element joint (including connection to abutment and final joint).

本文根据沉管隧道工程建设的关键技术和宁波常洪隧道工程土软、水浅、淤重等客观地质地理环境条件，介绍了沉管隧道工程的施工技术特点，如干坞边坡稳定和管底基础变形的控制技术、本体防水混凝土管段制作的裂缝和干舷控制技术、管段江中桩基基础的施工和其与管底连接的技术工艺、管段基槽清淤和沉放定位施工技术，以及管段接头连接（包括与岸边段的连接和最终接头）的施工技术等。中国论文联盟http：//www.lwlm.com

objective the aim of this study is to investigate the expression and the distribution of the nerve growth factor during the period of neural tube development of human embryo.method early development of neural tube was studied in human embryos about 35 gestational days by using immunocytochemical abc technique.result there were ngf immuno-positive substances in the cytoplasm and nuclei of neuroepithelial cells in the ventricular zones of neural tube.in the intermediate zone of neural tube,ngf immunoreactivity was detected in the nuclei of some neurons,or the processes of other neurons which contained no ngf-immunoreactive substances in their nuclei;the expression pattern of ngf in the marginal zone of neural tube was similar to that of the intermediate zone.the density of ngf-immunorecative particles was higher on the rostrum side of neural tube than on the caudal side.the ngf immuno-positive cells were also observed among the somites of embryo under the neural tube.conclusion these results suggest that ngf was an important signal molecule to induce neural tube differentiation,and that ngf may play a significant role in regulation of the biological function of neurons in developing neural tube.

目的 研究捷安肽素的抗真菌作用机理。方法采用形态学方法和同位素标记法。显微形态观察经捷安肽素处理后的供试真菌的形态学变化。进一步采用14c同位素标记的特异底物&尿苷二磷酸-（14c）-葡萄糖&示踪，研究捷安肽素对真菌(1，3)-β-d-葡聚糖合成酶活性反应的影响。结果研究神经生长因子在早期人胚神经管发育过程中的定位表达。方法采用免疫细胞化学 abc法染色，研究35天人胚的发育情况。结果在人胚神经管的室管带中，神经元的细胞质和细胞核ngf免疫反应阳性；在中间带，一部分神经元的细胞核ngf免疫反应阳性，另外一部分神经元的细胞核ngf免疫反应阴性，而其突起ngf免疫反应阳性；在边缘带ngf的表达与中间带相似。在神经管的头侧ngf阳性反应较强，神经管的尾侧ngf阳性反应较弱。结论 ngf在人胚神经管免疫反应阳性，表明ngf可能是诱导神经管分化发育的重要信号分子，提示ngf可能在人胚神经管的发育中具有十分重要的作用。神经生长因子；人胚；神经管；发育

The experimental and analytical results show that the axial rigidity of the corrugated pipe is 23.0 percent of the bare pipe with the same thickness and diameter,and the thermal compensation performance of the former is 2.27 times the latter's under equal-stress condition.By using corrugated pipe bundle instead of the bare pipe bundle with the same stiffness as its tube sheet,the axial thermal compensation can be increased by 40.4 percent,and the corresponding pulling-out force is 53.2 percent of that of the bare pipe bundle.

研究结果表明，波节换热管单管的刚度为相应光管的23.4%；在最大应力相同的条件下，波节换热管的轴向热补偿量为相应光管的2.27倍；在光管管束与壳体等刚度条件下，用波节管管束代替光管管束，轴向热补偿量可提高40.4%，相应的拉脱力为光管管束的53.2%。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了