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Pintle controlled solid propulsion is one approach to achieving this goal.

本文以喉栓变推力发动机的技术发展为需求背景，开展了喉栓变推力发动机的原理试验研究。

Under different actuating velocity and free volume of the throat pintle,all the parameters in the flow field were analyzed.

喉栓型面无疑是各种影响因素中关键因素之一，同时对喉栓型面进行优化及瞬态流场的计算。

The experimental system of non-coaxial pintle motor was established including pintle motor, driving system, measurement and control system.

研制了非同轴式喉栓变推力发动机试验系统，开展了喉栓变推力发动机的原理试验。

The internal ballistics prediction method of pintle motor was developed and internal ballistics of test motors were calculated. The experiments show that this prediction mothed is valid in certain degree.

建立了喉栓变推力发动机的内弹道预示方法，开展了喉栓变推力发动机的内弹道预示，与试验的对比表明该方法基本能反映出推力调节过程的主要物理特征。

The main contents and results are included as following:The main influence factors on thrust adjusting character of pintle motor were sumarized. The influence of burning rate exponent and throat diameter on thrust was analysed and the relationship between pressure and thrust ratio of pintle motor was obtained.

本文研究内容及主要成果如下：(1)从理论上分析了喉栓变推力发动机推力调节特性的主要影响因素，揭示了推进剂压力指数和喷管喉部面积变化对推力调节特性的影响规律，给出了压力调节比和推力调节比之间的转变关系。

The breaking of pintle in experiment was finally solved by changing the material and improving the pintle configuration. The main reason of slowly climbing of pressure was found out by analyzing and some validating experiments. A pintle motor test with high combustion temperature propellant was carried also.

对调节比、自由容积和调节方向的影响进行了研究；对试验中出现的喉栓结构破坏的问题，通过改进喉栓结构设计，更换材料最终获得了满意的效果；对推力调节响应特性进行了研究，通过理论分析和验证试验找出了导致调节缓慢的主要原因；还进行高燃温的探索试验。

Methods:91 patients with vocal polyp were included in this study.

91例声带息肉患者，52例在纤维喉镜下激光治疗，39例在支撑喉镜下显微手术切除。

Result 1 The expression of Survivin in LSCC was up-regulated,and the expression had significant difference (P.05) between LSCC and normal squamous epidermis near cancer or laryngeal polypi.

结果 一、Survivin在喉鳞癌组织中表达上调，与癌旁正常鳞状上皮及喉部息肉相比均有统计学意义(P.05)。

The expression of HPV16/18 DNA in LSCC was up-regulated,and the expression had significant difference (P.05) between LSCC with normal squamous epidermis near cancer,laryngeal polypi.

二、HPV16/18DNA在喉鳞癌组织中表达上调，与癌旁正常鳞状上皮及喉部息肉相比均有统计学意义(P.05)。

Three ablative test methods for small-scale motors were introduced,and a new test method for quadrate throat insert was emphatically analyzed.

介绍了3种小型发动机喉衬烧蚀试验方法，并着重分析了一种方形喉衬的试验方法。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。