Caroli's disease with intrahepatic gall-stones and salmonella infection

At operation for small bowel intussusception, a 26-year-old man was found to have an enlarged liver and spleen. Subsequent investigations suggested bile passage infection associated with numerous intrahepatic gall-stones but symptomatic cholangitis did not present until 5 months later. Retrograde cholangiography showed cavernous ectasia of the bile ducts which contained gall-stones.     

正构烷烃的氧化以制取合成脂肪酸的研究

试验了国产的各种硬蜡及软蜡,确定了它们的氧化可能性。提出了可供工业上应用的加速氧化反应的二个方法:改善加入催化剂的方法及在泡沫状态下进行氧化。 对於简化分离氧化蜡亦提出了新方案。 文中还叙述了在氧化初期催化剂的作用,对工艺过程的控制有一定的帮助。     

The critical transmural pressure of the abirway

The critical transmural pressure (Ptm) is defined as the transmural pressure of the airway at the site where and when flow is limited during a forced expiration. According to the presented theory, the maximal expiratory flow (Vmax) can be calculated from the relation between Ptm and the corresponding cross-sectional area of the airway (A). By means of a pitot-static tube, Ptm-A curves were constructed for several locations in the elastic airway of a mechanical model. From these curves local Vmax was calculated at different values of Ptm and compared with actual flow, i.e. measured Vmax for the entire airway. In the downstream part of the airway, the actual flow equalled calculated Vmax at most Ptm values. The site of flow limitation, being the most upstream point where actual flow equals calculated local Vmax could therefore be located. Theory and experiments showed positive as well as negative Ptm not influenced by change in upstream or downstream resistance. Flow limitation could therefore be initiated at distending as well as compressing pressures across the wall of the airway. V was regarded as a function of Ptm and the elastic recoil pressure of the lung (Pel). Measured and calculated iso-Pel, Ptm-V curves agreed well with one major exception: when Ptm less than Ptm measured curves were distorted due to a concomitant downstrean compression of the collapsible airway.     

Traffic Source Characterization：Considering Real Demands of Communication Attempts

ＴｒａｆｆｉｃＳｏｕｒｃｅＣｈａｒａｃｔｅｒｉｚａｔｉｏｎ：ＣｏｎｓｉｄｅｒｉｎｇＲｅａｌＤｅｍａｎｄｓｏｆＣｏｍｍｕｎｉｃａｔｉｏｎＡｔｔｅｍｐｔｓＣａｉＢｉｎ；ＺｈｅｎｇＨｕｉｓｏｎｇＡＮＤＷａｎｇＬｉａｎｇｙｕａｎ（Ｄｅｐａｒｔｍｅｎｔ，ｏｆＭ...     

MSAP构建融合接入网

通信技术的不断发展、客户需求的快速变化以及大量新业务的产生,对运营商现有的本地网技术和应用提出了新的挑战,特别是投资规模最大、应用最为复杂的本地网接入层目前正面临着四大挑战：如何适应数据业务发展的要求、如何适应业务综合接入与汇聚的要求、如何适应向客户提供差异化服务的要求及如何适应网络灵活扩展的要求。而传统的PDH、光纤收发器、协转等接入设备及组网方案存在的技术单一、网络适应能力不足、运维成本高、管理功能不完善的问题日渐突出,已无法适应新的变化。因此,本地网的建设和发展对接入层设备和解决方案提出了新的要求：     

"预应力施工配套机具的研制"课题通过鉴定

"预应力施工配套机具的研制"系北京市科委科技合同项目.该课题的立足点是研制高效实用的张拉、组装、预紧、切断等预应力施工机具,以点带面地推出系列预应力用更新换代产品.