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THE FIRST TOTAL SYNTHESIS OF TAXAMAIRIN B Taxamairin B, representive of rare naturally-occuring rearrang-ed 9(10→20)-abeo-8, 11, 13-triene diterpenoids, has been firstsynthesized by a eleven-step route in an overall yield of 8.19%,starting from commercially available catechol and 1,3-cyclohexan-dione. The improved Friedel-Crafts annulation, thermodynamicallycontrolled-geminal pairing methylation, the selective oxidation ofallyl group and the selective reduction of the less-hindrancecarbon-carbon double bond are the key steps.

二。美丽红豆杉素B的全合成研究 1，美丽红豆杉素B的首次全合成以价廉，易得的邻苯二酚和1，3-环己二酮为原料，经过改良的Friedel-Crafts烷基化反应，热力学控制的α，β-不饱和酮结构的α一位双烷基化，烯丙位的选择性氧化，以及选择性还原位阻较小的碳碳双键等十一步反应，以8.19％的总收率首次完成了美丽红豆杉素B的全合成。

A glass of fresh, fruity white accompanying vegetables previously marinaded in olive oil and served grilled, set down on a stone table in a shady spot in the garden situated high in the hills of the islandof Ischia ;The exilarating view of a vineyard nestled between the sea and the mountains during a walk around the sharp schistous terrasses of Banyuls ;The gentle pleasure of cycling in the Entre-Deux-Mers, along the delightful Roger Lapbérie bicycle track ;The magical encounter with a wiley, entertaining wine grower in the cool of his Burgundian cellar ;All this and many other happy holiday memories evoked by the wines themselves which were bought as souvenirs...This Summer, we hope you will also taste the thousand and one pleasures of the 'wine civilization'!

一杯鲜活、果味浓郁的白葡萄酒，配予浸过橄榄油的烤蔬菜；置于Ischia岛顶端绿木遮挡的公园石桌上；在Banyuls陡峭的平台上漫步时陶醉在海与山之间的葡萄园美景；沿着Roger-Lapébie自行车道（以原环法自行车赛冠军命名）骑车畅游在两海之间；在勃艮第清凉的酒窖内与狡诈的酿酒人相遇；以及其它等多在假期中以葡萄酒为证的美好回忆……今年夏天，我们预祝您度过一段品味葡萄酒文明的美好时光！

In the paper, on the basis of aggregation of previous studies, the development of optical technology and development trends at home and abroad are introduced, the principle of Fresnel lens is summarized. In accordance with its principle, circle equidistant steps Fresnel lens design is described. And on this basis, based on Fresnel design, also based on a continuous upward spiral of the plane curve concept, incidence surface and the backlight is set up to greet Archimedes - Fresnel lens design formula and the Second parabolic type Fresnel lens design formula, and on this basis, the advantages and disadvantages of the three designs is discussed.

本文在充分了解非球面光学技术在国内外的发展状况和趋势的基础上，同时从菲涅尔透镜的光学原理出发，并根据它的工作原理推导了圆环等距菲涅尔透镜的设计步骤，并在此基础上依据菲涅尔的设计思想，同时依据平面曲线的连续又呈螺旋的构思，推导出了迎光面和背光面阿基米德型菲涅尔透镜的设计公式和二次抛物面型菲涅尔透镜的设计公式，并在此基础上讨论了这三种设计各自的优缺点。

The four sets of stator bars including those retired from three large generators and the standby bar subjected to Dynamic Mechanical Analysis, Scanning Electron Microscopic and optical microscope observation. It was revealed from DMA that the peak value tan d m of mechanical loss thermogram tan d ~ T shift toward a higher temperature and a lower amplitude, indicating that the amount of movement monomers diminished greatly in the insulation aging process, the tan d 195, increased very slightly with the service time of insulation, showing the degrading of bonding properties at interface, and the presence of more defects in insulation. The observation of SEM and optical microscope showed that more and more voids appears in insulation, and delamination was formed due to development of voids in aging process.

对不同运行年数的线棒进行了 DMA 、 SEM 、光学显微镜等微观分析试验，动态力学分析发现(参见 Hao et al， CEIDP， 2002：404)，力学损耗温度谱 tan d ~ T 的峰值 tan d m 随老化时间向高温、低值方向移动，表明促成环氧发生玻璃化转变的活性侧基或发生局部运动的活性链段减少，分子链的刚性增强；195℃的力学损耗 tan d 195随老化时间有缓慢增大的趋势，表明有更多的能量耗散在界面处，界面的粘合性变差，甚至由于界面粘结不良出现微观缺陷； SEM 和光学显微分析发现(参见 Hao et al-2， IEEE DEI， 2003)，老化后的绝缘气隙增多，随着老化时间气隙不断扩展或相互连通，绝缘逐渐分层。

Based on Prandtl's momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub-layer, buffer layer, and main turbulent stream for non-Newtonian fluid flowing turbulently in ducts, which according to Karman's three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non-Newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate.

摘要以普兰德动量传递理论为基础，按照卡门的三层模型，通过室内模拟环道用0号柴油及加入减阻剂在圆管内的流动参数的测定，计算了非牛顿型流体管内湍流边界层的层流内层、过渡层、湍流中心的涡流粘度，涡流粘度与运动粘度比、总应力随相对位置的变化等定量参数，探讨了高分子减阻剂对非牛顿流体流动特性的影响，对湍流减阻现象的机理与增大减阻率的条件进行了定量分析。

Their adsorption rate on the molecular sieve catalysts surface and the stability of their carbonium ions were then obtained based on the molecular simulation on these molecules from their dipole moment, 2-dimensional electrostatic potential energy contours and 3-dimensional electrostatic potential energy isosurface.

采用半经验的AM1量子化学计算方法和静态理论，分别考察了噻吩、 3 甲基噻吩和 2 ，5 二甲基噻吩分子结构特性的不同，从偶极矩、各自垂直于芳香环平面的二维电势能分布曲线和整个分子周围三维电势能分布情况等方面分析了它们在分子筛催化剂表面吸附速度的快慢和生成正碳离子稳定性的高低，进一步比较了噻吩及其衍生物所生成的正碳离子进一步反应的能量变化，从而可判断噻吩及其衍生物裂化脱硫速度的快慢，噻吩及其衍生物裂化脱硫的速度由大到小分别为：2 ，5 二甲基噻吩、 3 甲基噻吩、噻吩。

The four articles show the preliminarily philosophical transmutation on the view of moral between heaven and human made by Confucius on the basis of the ideas of heaven and human formed from the Xia, Shang,Western Zhou dynasties to the Spring and Autumn period; they reveal Confucius' orientation to think which transformed the traditional heaven as dominator into the moral heaven, and transformed the relationship between the subject and the metaphysical existence from external transcendence to innerness; thus they relieve Confucius as a keen and profound thinker at that time.

本文通过对帛书易传《二三子问》、《易之义》、《要》、《缪和、昭力》四篇的分析，认为帛传四篇为孔子《易》论，其中包涵着《论语》、《孔子集语》、传世本《易传》等反映孔子思想的传世文献所隐微罕见的天人道德观念；帛传四篇表现了孔子在涵括三代以至春秋新旧天人观念的基础上对于天人内涵的初步的哲学改造，反映了孔子将传统的主宰之天转化为道德之天、并将传统的主体对于形上存在的外在超越关系转化为内在超越关系的致思取向，从而凸显了孔子作为当时敏锐而深邃的思想家的形象；帛传四篇所涵具的孔子天人道德思想补足了三代天命德政观与思孟天道性命思想之间的逻辑缺环，是经由曾子而达致《中庸》、郭店儒家简、《孟子》乃至传世本《易传》所体现的天道性命思想高峰的理论根据。

FINDING - The main side effects of inserting the IUD are abnormal menstruation, the IUD move down, abnormal leukorrhea, abdominal ache and pregnancy with IUD in situ, etc, which account for 20.9%;The sufferer caused by removal of IUD take up 15%;89.2% had heard IUD before, the risk to have more than three side effects is 67.8% analysed from the data;The knowledge about the side effect is mainly come from news paper , magazine, TV, radio, doctors and brochures of the family planning service,Conduct follow-up regularly occupy 68.9% and 71.5% were satisfied with the propagation and education about IUD and contraception.

结果 放置宫内节育器的主要不良反应为月经异常、环下移、白带增多、腰腹疼痛、带器妊娠等，各种不良反应的总发生率为20.9%；因症取出率为15%；89.2%的人听说过宫内节育器不良反应，但了解3种以上不良反应的只有67.8%，宫内节育器不良反应知识来源主要是计划生育部门的宣传、报纸、杂志、电视、广播、宣传资料及向医生咨询；按规定参加术后随访的为68.9%，对当前宫内节育器及避孕知识的宣传教育满意率为71.5%。

The change of water environment s quality of urban area in Suzhou was caused by the change of water system and pollution control. It suggested that it need to control the municipal and agricultural pollution besides the control of industrial pollution. The improvement of water quality and ecol...

提出，除继续加强对工业污染源的防治外，还需对水系范围内的生活、农业等方面产生的污染进行防治；在规划水利建设工程时，应将水环境质量的改善与生态建设全面地比较与评价，按其结果再实施工程建设；已建成的环太湖间在不影响其主要功能的情况下，应保持开启，让优质的太湖水补给运河，从根本上改善苏州市区水环境质量。

Then, aerodynamic parameters in different flight conditions are used to imitate the uncertainty of the system, and the digital simulation of closed-loop system designed is performed. The results show that the system can accomplish asymptotic decoupling of roll angle, sideslip angle and head-on angle for aircraft, and the system is provided with the function for restraining uncertainty in the system. This illustrates that the flight control system designed has not only good decoupling characteristic, but also better robustness.

然后用不同飞行条件下的空气动力参数变化来模拟系统的不确定性，并进行闭环系统数字仿真，结果表明，所设计的控制律不仅可实现对飞机滚转角、侧滑角、迎角等的渐近解耦控制，而且对系统不确定性具有较强的抑制作用，说明系统具有较好的解耦性和较强的鲁棒性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。