扫描范围

The results show, when the prism wedge angle is 4°, the transmitted laser beam changes about 1 μrad as the prism rotates 1′; when the small angle deviation on one side of the minimum deviation angle of each prism is controlled, the scanning range of laser beam in the horizontal and vertical direction is not less than 500 μrad, and the scanning precision of the device is superior to 0.2 μrad.

结果表明：取棱镜棱角α为4°时，棱镜每旋转1′，透射光束变化约1 μrad；分别控制双棱镜在其最小偏向角一侧小角度偏转，可以实现光束在水平方向和垂直方向500 μrad范围内的精确扫描，装置的扫描精度可以达到0.2 μrad。

The construction and the principle of the two-dimensional galvanometric scanner laser scanning system are theoretically described.

对二维振镜激光扫描系统组成和原理进行了理论描述，讨论了在视距范围内采用扩束装置和振镜系统对激光束实施可靠控制的方案，并在水下光通信系统中有效地完成了对水下和空中运动目标所在区域的扫描。

The construction and the principle of the two-dimensional galvanometric scanner laser scanning system are theoretically described. The methods to effectively control the laser beam with bunch expanding devices and the galvanometric scanner system in the visible range and finish the scanning of the area of the goal underwater and in the air in the underwater optical communication system.

对二维振镜激光扫描系统组成和原理进行了理论描述，讨论了在视距范围内采用扩束装置和振镜系统对激光束实施可靠控制的方案，并在水下光通信系统中有效地完成了对水下和空中运动目标所在区域的扫描。

Sensor: 32km targeting range, 4 locked targets, 580mm scan resolution, 11 magnetometric sensor strength, 42m signature radius

感应器：最大锁定范围32公里，最大目标锁定数 4，扫描分辨率580mm，磁力计感应强度11点，信号半径42m（现为：最大目标锁定数 5，扫描分辨率590mm

During CT scan,patients were in supine position, and the teeth in the middle of the contactposition on the jaw; and maintain a static head and body during the scanningprocess, did not swallow; measurement parameters including: soft palatelength, maximum thickness of the soft palate, pharynx lateral spacing, uvula length and base width of the free edge ofsoft palate to the throat wall spacing, velopharyngeal cross-sectional area,angina cross-sectional area,thickness of retropharyngeal wall.

随机对10例患者进行系统的腭咽CT测量，测量时间为术前、术后3个月、术后6个月；测量方法为：患者在清醒状态下进行平静呼吸时的上气道CT扫描，范围自听眶线至声门。利用CT工作站进行三维重建和测量。CT扫描时患者取仰卧位，牙齿处于正中颌的接触位上。

Results］All 18 cases were observed the real and the false cavity satisfiedly in two kinds of scanning.

结果］18例患者MSCT主动脉全程增强扫描均满意观察到真、假腔的大小、范围、主要分支是否受累。18例采用心电门控扫描显示胸廓入口至主动脉裂口水平的主动脉真假腔与全程增强扫描一致。

Methods:47 normal subjects' cerebrums carried out anteroposterior axes T1WI scanning. Then the center deck was selected,the AC-PC line was found and perpendicular was to make.The second,follow the perpendicular,the scanning scope was determined,which contained callositas' anterior and posterior borders(including pars geniculate and splenium).

方法利用GE3.0T磁共振对47例健康志愿者进行颅脑矢状位T1WI扫描，再选择正中矢状层面，找出AC-PC线并作垂线，前后范围包括胼胝体前后缘，层厚及层间距固定，扫描参数固定。

The two-photon absorption cross-sections of these styryl derivatives were determined by Z-scan technique, and the benzothiazolium derivatives exhibited the largest TPA cross-sections (10〓s·cm〓/photon) and the best power limiting ability at high operable incident intensity. The results show that the benzothiazolium derivatives are promising organic compounds as two-photon absorption optical limiting materials. 2. Several organic dyes active to 800nm femtosecond laser with D-π-A structure were designed and synthesized.

研究了它们的上转换荧光、上转换激射和光限幅行为，通过改变染料分子共轭体系的大小，首次实现了在576nm-635nm范围内的双光子上转换激光波长的调节，其中噻唑啉碘盐类二苯乙烯化合物的双光子上转换激射峰（576nm）是迄今在1064nm皮秒激光作用下能够得到的最短波长的激光；阴离子显著改变上转换激射效率，但对上转换荧光峰和激射峰的位置影响很小；增加溶液的浓度，上转换荧光光谱和激射光谱红移，并在一定的浓度范围内，能够有效的提高上转换激射效率；利用Z-扫描技术测定了染料分子的双光子吸收截面，发现苯并噻唑类染料分子的双光子吸收截面高达10〓s·cm〓／photon，而且在较大的入射光强范围内，这类染料分子具有较大的光限幅能力，是一类作为双光子吸收光限幅材料很有潜力的染料分子。

In this thesis, the phase diagram of Zn-Al binary system on 10~69.5 w% was reinvestigated by using differential scanning calorimeter, X-ray diffraction and pushrod dilatometer. The process of isothermal transformation during the aging of high-Aluminum-Zinc-based alloy was studied by using differential scanning calorimetry, and the aging behavior of the alloy was analyzed at the aspect of thermal analysis kinetics. The change of microstructure which the alloy was being heated was observed on high-temperature metallurgical microscope. The microstructure and wear-friction properties were compared among the alloys treated with several different heat treatment processes, and a model for heat treatment processes was proposed based on artificial neural network,so as to predict the relationship between friction coefficient and parameters of aging treatment such as aging temperature and time.

本文采用高温X射线衍射、示差扫描量热分析、热膨胀等方法重新测定含锌量范围为10％～69.5％的Zn-Al系二元相图，利用示差扫描量热分析法，研究高铝锌基合金时效等温转变过程，并从热分析动力学的角度分析高铝锌基合金合金时效行为；使用高温金相显微镜观察合金加热时的组织变化；比较几种不同热处理工艺对高铝锌基合金显微组织与耐磨性能的影响并利用人工神经网络建立高铝锌基合金热处理工艺模型，预测合金摩擦系数随时效温度及时间变化规律。

The key techniques of STM IPC-205B were shown as following: the design of the micro-displacement transmission system with wide scope and high speed; the physical mechanism and vibration-proof measures which greatly influence the theoretical precision of STM; the basic design theory of scanning system and data collection system; the methods of the intelligent control of scanning voltage and the logarithm contraction of tunnel current.

对STM IPC-205B型机关键技术进行了探讨，主要包括：大范围快速扫描的微位移传动系统的设计；对实现STM理论精度有重大影响的振动源的物理机理以及防振的措施；扫描与数据采集系统设计的基本理论；给出了实现扫描电压的智能控制和对隧道电流进行对数压缩的方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。