前弯

Methods Seven cadaveric spinal specimens were measured of neutrol zoneand range of motionin 6 movements including anteflexion,retroflexion,left and right lateral flexion,left and right axial rotation.

测试前屈、后伸、左侧弯、右侧弯、左旋转、右旋转的中性区(neutral zone，NZ)和运动范围(range of motion，ROM)。程序：完整状态；②骨折后状态；③椎体成形后；④3000次循环疲劳后。结果骨折后中性区和运动范围均明显增大。椎体成形后屈伸、侧弯、旋转在NZ及ROM均明显减少。

The rod may now be bent into lordosis using the Rod Bender (Figure 17). The rod does not have to

用弯棒钳将棒根据前凸弧度折弯(图-17)，棒不需要非常精确的折弯以适合螺钉的位置，特别是对于

The phase of ω0 frequency fluctuates tempestuously. The resonance peaks of flexural and torsional vibrations response are present at 2/3ω0 1/2ω0 1/3ω0 and 1/4ω0 with three kinds cracked rotor models. Near 1/2ω0 frequency, quasi-periodic and chaotic motions maybe appear. Periodic, quasi-periodic and chaotic motions show on alternately when the rotating speed is near to 2/3ω0.Combined step-by-step integral method with traditional transfer matrix method, an increment transfer matrix method is put forward.

研究结果表明：各种故障情况下，华北电力大学博士学位论文弯振和扭振之间都存在祸合关系，但弯扭祸合振动一般不会威胁机组安全运行：在叶片丢失或滑环飞脱故障时，将产生很大的弯振，同时各转子扭振也将被激发出来，它以工倍频和前三阶固有频率为主；在各种电气故障情况下，各转子都很快被激励出较大幅值的扭振来，相应各转子弯振也发生一定的变化，但它的变化明显滞后于扭振，扭振和扭矩主要以前三阶固有频率为主。

The responses properties of coupled vibrations for 120° and 180°asynchronous juxtaposition of 200MW turbine-generator set were analyzed. The results show that the responses properties of flexural and torsional vibrations caused by 120° asynchronous juxtaposition are similar to that of 180° asynchronous juxtaposition. When the fault happened, Former two steps inherence frequencies and whirl speed frequency of torsion are excited. And the first step inherence frequencies of flexural vibration are also excited besides whirl speed frequency. Transient electromagnetism moment peak, torsional and torsional moment responses caused by 180° asynchronous juxtaposition are lower than that of 120° asynchronous juxtaposition.

利用该方法，针对某200MW汽轮发电机组的120°和180°两种非同期并列情况，进行了机组弯扭耦合振动响应特性研究，分析表明：汽轮发电机组的120°和180°两种非同期并列情况下的弯振和扭振响应特性基本相似；非同期并列主要激发出工频和前两阶固有频率扭振，弯振除工频主分量外，第一阶固有频率也被激发出来；180°非同期并列时的暂态电磁力矩峰值比120°非同期并列时低，相应的扭振和扭矩响应也小于后者。

Result: Scoliosis was identified in 58 cases with Marfan syndrome (38 males and 20 females), the prevalence rate was 42.03%, male-female sex ratio was 1.18:1, 6 cases were in younger than 10-year-old group. 12 cases were in 11~20-year-old group, 19 cases were in 21~30-year-old group, 11 cases were in 31~40-year-old group, 7 cases were in 41~50-year-old group, 3 cases were in 51~60-year-old group. Mean magnitude of Cobb angle in coronal plane was 26.8°±27.8°, the types of scoliosis curve included thoracic curve (36 cases), thoracolumbar curve (11 cases), lumbar curve (2 cases), double curve (6 cases) and triple curve (3 cases), apex vertebraes were convex to the right side among single curves in 38 cases while 11 cases were convex to the left side. Mean magnitude of kyphosis in sagittal plane was 14.3°±13.2°, 5 patients had thoracic lordosis and 40 patients had hypokyphosis and 12 patients had normal kyphosis.

结果：58例(42.03%)患者合并脊柱侧凸，男38例，女20例，男女患病率比例为1.18：1，其中≤10岁6例，11~20岁12例，21~30岁19例，31~40岁11例，41~50岁7例，51~60岁3例；平均冠状面Cobb角为26.8°±27.8°；胸弯36例，胸腰弯11例，腰弯2例，双弯6例，三弯3例；单弯中顶椎凸向右侧38例，凸向左侧11例；矢状面胸椎后凸平均为14.3°±13.2°，其中胸椎前凸5例，胸椎后凸不足40例，胸椎正常后凸12例，仅1例胸椎后凸45°；11例患者冠状面Cobb角＞40°，平均年龄15.9岁。

The completion of four times breathing,recline action to keep 4times take adeep breath before bending movements,the head by the knee,the same completion of four times take adeep breath.

完成4次呼吸，后仰动作保持4次深深呼吸，前弯动作时，头靠膝，同样完成4次深深呼吸。

The completion of four times breathing,recline action to keep 4times take adeep breath before bending movements,the head by the knee,the same completion of four times take adeep breath.

完成4次呼吸，后仰动作连结4次深呼吸，前弯动作时，头靠膝，同样完成4次深呼吸。

It's a circuit that I like quite a lot, it holds many happy memories for me and also my favourite corner of any track is at Jerez, the last right hand turn before the hairpin.""

Jerez是条我很喜欢的赛道，这里我有许多美好的回忆，也有所有赛道里我最喜欢的弯角-中段发夹弯前的右弯。

The result is found that after engaging in the regular aerobic exercise for twelve weeks, the experimental group has a better performance than the control group. Their body composition and physical fitness (sedentary stretch, 30/ 60 seconds sit-up, standing broad jump, and 800 meters jogging) are all above-average (p＜0.05). Although the blood lipids is unable to reach the expected average (p＞0.05), the TC, TG, LDL all have a descent and, at the same time, HDL also tends to the upside.

结果发现12周的规律有氧运动训练介入后，实验组在身体组成（体重、BMI、体脂肪百分比、腰臀围比）、健康体适能（坐姿体前弯、30秒、一分钟仰卧起坐、立定跳远及八百公尺跑走）均优於控制组，并达显著水准（p＜0.05），而血脂肪方面虽未达显著水准（p＞0.05），但TC、TG、LDL下降的现象，HDL也有上升的趋势。

Girl students from different school years were found to show difference significantly on height, weight, flexibility, sit-ups, standing broad jump, and cardiovascular endurance.

不同学年度七年级女生在身高、体重、坐姿体前弯、仰卧起坐、立定跳远、心肺耐力表现之差异达显著水准。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐