精度

Furthermore data assimilation experiments are conducted with MM5 Adjoint-model Assimilation System made by adjoint codes. With a case of heavy rainfall taking place from 00h July 23 to 00h July 24,2002, several numerical simulation experiments of different schemes are performed. The results are as follows. MM5 Adjoint-model Assimilation System not only can improve the initial field effectively and promote the coordination with the model but also can enhance the forecast on the precipitation and other elements. The assimilation of CDW has an improvement on quality of upper wind. The effect of direct numerical simulation with utilizing the CDW to amend the initial field gains the advantage over the one not.

结果表明，MM5伴随模式同化系统能有效改善初始场与模式的协调能力，提高模式对于降水场和其它要素场的预报；使用云导风资料修正初始场后直接模拟的效果比未使用时直接模拟的效果要好，对部分区域的强降水预报精度有一定程度的改善；使用伴随模式同化系统后，加入云导风资料的同化试验对其它要素的改善与直接同化常规资料的效果相比，改善优势不明显，但从各要素的误差来看，对于风场的改善最好。

The new method is presented to contrast economics based on the Haken pattern recognition. The synergetic network is builted and the prototype vector and adjoint vector of investment data are obtained.

经过与实际结果对比，可以看出该模型较好地反映了投资要素之间的非线性关系，具有较高的精度及理想的预测效果，可广泛应用于各种预测研究，有较好的推广应用价值。

A new digital measure method was presented based on the three coordinate measuring machines. Compensation of sensor radius, establish part's measure reference frame, the best measuring layout and mix programmed scanning all those not only enhance measure precision and increase efficiency of scanning measure, but also the data can image geometrical characteristic of complex surface. The method was illuminate by a sample, and the digital data of the surface adumbration are obtained at last

在三坐标测量机的基础上给出了一种数字化测量曲面轮廓的方法，通过测球半径的补偿、坐标系的建立、最佳测量路径的规划以及混合编程扫描，提高了测量精度及扫描测量的效率，而且采集到的数据可以反映曲面的几何特征，并以实例对该方法进行说明，得到了数字化的曲面轮廓数据。

There are several examples of the advection, hyperbolic system and wave problems discussed in this present work.

数值结果皆与解析解或数值解比对结果良好，证明本文所提出的无网格数值方法对於波动问题具有高度精度、一致性与效率。

This paper takes the reserves estimate of Bohai J25-1 Oilfield as an example.Based on FMT pressure analysis of this oilfield, the net thickness, reservoir type, fluid interface and reservoir communication are confirmed, coming to advisably divide the calculation units and improve the accuracy of reserves calculation.

以渤海J25-1油田储量评价为例，在充分论证压力资料适用性的前提下，运用FMT压力分析确定了有效厚度下限、油气藏类型、流体界面及储层连通性，达到了合理划分计算单元、提高储量计算精度的目的。

But unlike other roaming system, the system bases on the satellitic image and aerial photography of different geographical areas and different resolution.

但不同于一般的虚拟漫游系统的是，本系统的数据源是不同地理区域的不同精度的卫片和航片影像。

The flight plan is an important work of aerial photography, and its precision, automatization and speed directly influence the quality and efficiency of aerial photography.

航空摄影规划设计是航空摄影工作中的一项重要内容，其精度高低、自动化程度和设计速度将直接影响航空摄影的质量和效益。

The results show that the simulation system is reasonable, reliable and of high precision, and the shallow water control scheme for the aerial torpedo can completely ...

结果表明，该仿真系统结构合理，精度高，可靠性好，所采用的浅水控制方案可使空投鱼雷满足近海防御的使用要求，达到了预期的目的

With the development of aerial industry, the requirement of performance of the three-axis table is higher and higher.

随着航空、航天工业的发展，对其关键性设备惯性元件要求的精度不断提高，同时对转台性能指标的要求也越来越高。

Results predicted by this method are compared with experimental data and the accuracy of this method is found to be very good within the constraints of slender body theory. This method can quickly and accurately provide aerodynamic force coefficient for percept and preliminary design of the non-circular cross section missile.

经过对大量风洞实验模型的预测结果和实验结果的比较，表明该方法在细长体理论的范围内具有较好的精度，易于实现，可以为非圆截面导弹总体方案论证和初步设计阶段提供空气动力特性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。