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As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.

由于在过渡过程分析计算中，需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数，所以本文就特性曲线及关闭规律问题进行了研究，其主要内容如下：第1章，指出本文研究的意义和目的，回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果，在此基础上提出本文的研究内容；第2章，针对收集到的六套特性曲线，从比转速的角度出发来研究可逆式机组特性曲线的变化规律；并对六套曲线的最高效率流量和力矩曲线进行分段拟合，得到各分段函数的具体形式，再通过举例说明最高效率曲线的拟合步骤；第3章，以溧阳抽水蓄能电站为实例，分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化；第4章，结合高、中、低三水头段抽水蓄能电站，在导叶直线关闭的基础上，研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响；第5章，总结全文，提出今后研究的重点和方向。

Methods A total of 60 patients with acute stroke of less than 24 h duration were included in the study. Nutrition risk screening was done in all those patients, with nutritional parameters to evaluate their nutritional status. Nutritional parameters were evaluated at admission and after 14, 28 d after the stroke, respectively. Results We found 15 cases with nutrition risk of 60 patients in admission, and incidence rate of undernutrition is 13.3%.

收集我院急性脑卒中患者60例，均进行营养风险筛查评分，检测营养学的指标来评定其营养状况，对存在营养风险和营养不良的患者均进行常规脑卒中治疗和营养支持，在住院14d、28d后再进行营养风险评分和相应指标的检测，分析营养风险评分与营养评价指标的检测在临床工作中的作用。

Experiments on solid fermentation of uncooked material with rice, maize, wheat, sorghum and highland barley as its essentials and paddy and bran husk as its accessorial essentials with the affixion quantity 3％～7％ were done in accordding with the current development trend of liquor production.

摘 要：根据当前白酒生产的发展趋势，对生料固态发酵做了研究试验。以大米、玉米、小麦、高粱、青稞等为原料，麸皮、稻壳为辅料，添加量3％～7％。

A dyn amical visual analysis is done about a shrouded impeller which is used in a large-scale compressor unit on the basis of visual theory and finite element analysis theory with the combination of SolidWorks and ANSYS . With the vibration characteristics of the impeller under the inertial force, we get to know whether the impeller with given conditions can avoid from the resonant frequency or not and its influence of vibration on system.

以可视化理论、有限元分析理论为基础，结合三维建模软件SolidWorks和有限元分析软件 ANSYS 对某压缩机组用闭式叶轮进行动力学可视化分析，得到其在惯性力作用下的振动特性，可以判断其在给定工况下能否避开共振频率以及评估其振动对系统的影响。

Tracheal-intubation with mechanical ventilation was done, Chest X-ray was also taken and compared with previous picture revealed bilateral lung marking with pulmonary congestion and bilateral costophrenic angle blunting.

立即插管并使用呼吸器做呼吸的支持，且拍摄胸腔X光片。相较於手术前的X光片，双侧肺野的肺纹增加，肺区充血，和双侧肋膈角变钝。

"Until more research is done on the effects of perinatal vitamin D deficiency, we suggest treating breast-fed infants with craniotabes with vitamin D, or preferably, treating all pregnant women with vitamin D," said Yorifuji.

&直到更多的研究是做对的影响，围产期维生素D缺乏性，我们建议治疗母乳喂养婴儿与craniotabes与维生素D ，或最好，治疗所有孕妇与维生素D ，说：&寄藤。

If the patient has an intramedullary rod with proximal and distal screws, one set of screws can be removed to allow compression across the fracture with weightbearing. This is called ''dynamization'' and can often be done as an outpatient procedure with the use of local anesthesia.

假如患者使用远近端锁定的髓内钉，可以去除一端的锁钉，通过负重使骨折端加压，这称之为动力化，可以使用局麻作为门诊手术。

With fingers out of the gloves, the middle knuckles are pulled on with the finger sleeves.Matched with the gloves,the palms move freely so that the various permissive actions (such as fisting, grabing, hugging, grasping, embracing, buckling, twisting, capturing, taking,etc.) of wushu can be done by the player.

随着手指出的手套，中间关节处取出就与手指sleeves.matched与手套，手掌自由移动，使各宽容的行动（例如fisting ， grabing ，拥抱好，领会好，拥抱，屈曲，捻线，捕捉，同时考虑等），武术可以做的，由球员。

A retrospective study of 8 cases with middle-aged adults of NAION was done between 1997-1999. The visual functions, fluorescin angiography, VEP, color sense and systemic risk factors are analyzed along with their evolution with or without treatment.

材料与方法：於1997至1999年间台大医院眼科门诊病患中，选取八位诊断为NAION的青壮年病人，共十只眼睛，观察其临床过程、视力预后，并针对各项可能的危险因子，如有无高血压、糖尿病、心血管疾志、抽烟、血脂防浓度、视神经盘型态等，作比较和分析。

Under the base of it, also considering the characteristics of the multi-channel multistage rimfire gas switch, much study and experiments of the surface flashover along the PMMA insulator and the PMMA housing of the switch were done. Following conclusions were drawn: After introducing PMMA insulator among the board electrodes, the voltage of the discharging of the SF6 drops by 30%. With increasing of the pressure of SF6, voltage of the discharging descends more sharply. With PMMA spacer, the dispersing of the discharging voltage of the gas gap increased as compares to the unbridged gap, such increases in value of the discharging voltage become more obvious with the gas pressure increased.

本文对SF6气体中的沿面放电及影响因素进行了分析，在此基础之上结合边缘点火多级多通道气体开关的沿面绝缘结构特点，经过大量理论分析和电场计算，对有机玻璃支撑绝缘和有机玻璃外筒进行了沿面放电研究，研究结果表明：板电极间SF6气体间隙引入有机玻璃绝缘子后，间隙放电电压平均下降约30%，随气压增大放电电压下降趋势增大，引入有机玻璃绝缘子后放电分散性明显增大，随气压增大，放电分散性呈增大趋势。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。