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The Lithostegia Ching was considered as a member of Peranemaceae for a long time, according to the research,we found that it has the typical scalariform perforation plates,no associated or crossed phenomena,and some region have intact plate,no dimorphic phenomena,no weblike or threadlike remnants,these suggest that The Lithostegia Ching is in a primal evolutional position.

与传统观点不同,我们认为穿孔板仅存在于端壁的状分子为导分子,而端壁和侧壁形态、结构相似,有或无穿孔板的状分子为胞,蕨类植物中的状分子主要为胞。

The water chamber takes the shape of tilting cube, in favor of uniform distribution of cooling water on tube plate surface. The tube bundle is divided into two groups of zygomorphy according to the bisection system and it has eight support clapboards. The siphonopore center of each clapboard increases a certain distance corresponding to that of two tube plates and the cooling tube takes the shape of arch. The two-way cooling water of bisection flows through the condenser in opposite direction so as to improve the distribution of heat load for tube bundle. Around the throat of condenser, the final stage low-pressure heater, air extraction tube, intake device of bypass exhaust and the like are deployed.

它的特点是:水室呈倾斜立方体形状,有利于冷却水流在板面上均匀分布;由于采用对分制,束相应地分为左、右对称的两组,并且束设有八块支撑隔板,每块隔板的孔中心相对于两端板的孔中心依次抬高一定的距离,以使冷却呈拱形状;对分制的两路冷却水以相反方向流过凝汽器,从而改善束的热负荷分布;在凝汽器喉部布置了末级低压加热器,抽汽道及旁路排汽接受装置等。

The degradation of pollen tube RNA in vitro by stylar S-RNase at different temperatures was performed to detect the extent of degradation using the agarose gel electrophoresis. The germination and tube growth of self-pollen and the RNA of self-pollen tube were inhibited and degraded significantly greater than cross-pollen respectively at 10℃ and 25℃, but no significant difference when the temperature rose to 35℃.

10℃、25℃时,花柱S-RNase抑制自花花粉萌发和花粉生长的程度极显著大于抑制异花花粉的程度;花柱S-RNase降解自花花粉RNA的程度也明显大于降解异花花粉RNA的程度;温度升高到35℃时,自花和异花间花粉萌发和花粉生长被花柱S-RNase抑制的程度不存在显著性差异;花柱S-RNase降解自花和异花花粉RNA的程度也相似。

The influence of solution treatment on mechanical properties of bellows was estimated; The corrosion-resistance of bellows was compared at different materials and states; The capability of anticorrosion of two states bellows in high-temperature oxidation and sulphidation environment was analyzed.

本研究讨论了影响波纹发生腐蚀的介质及影响硫酸露点温度的因素;分析了波纹固溶处理后表面残余应力的分布规律;评价了固溶处理对波纹力学性能的影响;比较了不同材料、不同状态的波纹耐蚀性能及两态波纹在高温硫化-氧化环境下的抗蚀性能。

Methods 40 uncompliant elderly patients undertook gastric canal implantation with routine or retro bent radian methods. The routine method was performed for 30 times and the retro bent radian method for 34 times.

40例老年不配合患者分别用常规法和逆胃弯曲弧度法置入胃,其中常规法置入胃 3 0次,逆胃弯曲弧度法置入胃 3 4次。

The result shows: the material of glass reinforced plastic mortar pipe is brittle, the enlaced sample always destroyed along the interface of different layers, but the centrifugal sample destroyed along a breach; the capacity of bearing radial load of enlaced glass reinforced plastic mortar pipe is better than the centrifugal ones, the destroyed forms of them is also different. Secondly, the whole pipe and direct shear friction experiments between glass reinforced plastic mortar pipe and typical soil of Shanghai have been done.

结果表明:玻璃钢夹砂顶材属于脆性材料,缠绕式玻璃钢夹砂顶的材质试样基本沿着层与层之间的分界面破坏,而离心浇铸式玻璃钢夹砂顶材质试样的破坏是沿着某个滑裂面破坏;缠绕式玻璃钢夹砂顶的抗径向荷载性能要优于离心浇铸式玻璃钢夹砂顶,同时两者在径向荷载作用下的破坏形式明显不同。

Results: The angle that adjusting the reference line on the transverse plane is 32. 85°±6.76°, on the coronal plane is 14.15°±9.02°. The facial canal appears "ㄟ" on double oblique imaging geniculate ganglion, tympanic segment, post lap segment, mastoid segment were showed clearly. The achievement ratio is 100%. The segment displaying on double oblique imaging is more than transverse plane, coronal plane and sagittal plane.

结果:面神经双斜位图像需要在横断位参考图像上旋转参考线的角度为32.85°±6.76°,在冠状位参考图像上旋转参考线的角度为14.15°±9.02°;在面神经双斜位图像上,面神经表现为&ㄟ&形,由前向后同时显示出膝状神经节、鼓室段、后膝部和乳突段;面神经双斜位成像成功率为100%,面神经行程的显示程度大于横断位、冠状位和矢状位。

The method of CFD numerical simulation is employed to replace experimental investigation. Hence, STAR-CD of the commercial software is used to simulate the outer flow field and heat transfer performance of integrated heat sink with heat pipes cooled by airflow. It is found that simulated results agree with experimental results well, which indicates that simulation method is reasonable and reliable. Further, simulated computations for different fin thickness, fin pitches and air velocities are performed to analyze their effects on heat transfer performance of heat sink. Finally, a new optimized structure of integrated heat sink with heat pipes is provided to meet future demands for cooling CPU and its heat transfer is also evaluated. For multi-heat source and higher dissipation power of electronic devices, the integrated heat sink with heat pipes attatched fins stagged in different positions of channels is presented and its flow and temperature fields are also simulated to enhance heat transfer. As a conclusion, all mentioned above are useful for the design of heat sink with excellent efficiency of heat dissipation and further research.

应用商业软件Star-CD对CPU集成热散热器的外部流场和传热特性进行了数值模拟,将数值模拟结果和试验结果对比,验证了所提出的数值计算方法是可靠和可行的;利用此数值模拟方法对CPU集成热散热器在不同散热翅片间距、厚度和气流速度下散热器的流动与传热性能进行了数值计算,分析了这些参数的变化对散热器传热性能的影响;针对未来CPU冷却的要求,确定了与最优气体流速匹配的最佳翅片间距、厚度的CPU集成热散热器的新结构;利用试验评测了根据数值模拟提供的新结构开发出的新CPU集成热散热器的传热性能;最后在场协同强化传热的理论的基础上,对CPU集成热散热器的散热翅片错位排列来强化散热器的散热,满足未来大功率、多热源的电子元件的散热,为今后进一步优化散热器提供了依据。

For the problem of the ratio of inner to outer diameter of long tube, according to the "residual core" in the target plays an important role in DOP of long tube penetrator, the analytical model of long tube pentration in semi-infinite homogeneous steel target is established and calculated to devide three kinds of different scopes, the rule of varied by the ratio of inner to outer diameter is analyzed. The patterns of penetration of the yawed tubular against a normal homogeneous semi-infinite target is established, the size and direction of "residual core" is analyzed, under the different impact yawed, the regularity of variations in the yawed of the tube and depth of the penetrateion is described during the penetrateion against the plate.

二是对于长体的不同内外径比,依据长体时形成的中间&靶芯&是其侵彻机理不同于长杆体的重要因素,分三种情况建立了长体对半无限均质靶板的简化理论模型,并进行了分析,得出了穿深随内外径比变化的规律;描述了带攻角长体垂直侵彻半无限厚靶的物理图像,分析了&靶芯&力的大小和方向,建立了侵彻简化模型,给出了在不同的初始攻角条件下,体在侵彻过程中攻角和穿深的变化规律。

A motor/ generator cooling system that comprises condenser, liquid separator, lower liquid collecting ring pipe, insulating drainage pipe, stator bar, upper gas collecting ring pipe, balance tube, etc., the components, which is capable of carrying out natural circulation automatically.

以绝缘液体作为冷却介质,由冷凝器、回液、下集液环、绝缘引流、定子线棒、上集汽环、均压等部件组成,并能自动实现自然循环的一种电机冷却系统。

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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.

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