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The simulation indicates that dielectric constant warp is key factor to the design and preparation of chip mulilayer bandpass filter. The simulations were shown to be in good agreement with the experimental results.

模拟仿真表明：低烧材料的相对介电常数偏差是器件设计制备中的关键要素，仿真优化结果与LTCC试验样品的测试结果吻合较好。

Progress in the preparation of management plans of the construction progress Bar Graph and Netwark Map, and to adjust and optimize the construction period, address the assurance measures aiming at the factors that affect the progress of the construction period.

在进度管理规划中编制了施工进度横道图和网络图，并对工期进行了优化和调整，针对影响进度的因素提出了工期保证措施。

Progress in the preparation of management plans of the construction progress Bar Graph and Netwark Map and to adjust and optimize the construction period address the assurance measures aiming at the factors that affect the progress of the construction period.

在进度管理规划中编制了施工进度横道图和络图，并对工期进行了优化和调整，针对影响进度的因素提出了工期保证措施。

Recent advances in preparation of barium carbonate particles were reviewed.

综述了碳酸钡粒子制备方面的进展。

Preparation and characterization of fine barium carbonate particles.

我国碳酸钡的市场现状和发展方向。

Recent research advance in preparation of ultrafine barium carbonate and strontium carbonate is summarized.

综述了超细碳酸钡和碳酸锶制备方面的研究进展。

In this thesis the solid-state reaction at room temperature was applied to prepare nanometer barium carbonate. The feasibility of this method was studied and an optimized procedure for the preparation of nanometer barium carbonate was set up.

本文采用室温固相化学反应的方法，研究了在该条件下制备纳米BaCO_3的可行性，建立了制备纳米BaCO_3的方法体系，制备了平均粒经约为100nm，形貌近似为球形的纳米BaCO_3。

In the preparation of high purity barium carbonate , exist some problems related with metal oxide pollution, control of the amount of the material to be added, moisture content higher then the standard, etc.

为解决高纯碳酸钡生产干燥过程中金属氧化物的污染、入料量不易控制、成品水分超标等生产难题，通过对所用电动离心喷雾干燥机辅助设备、控制系统的改进及干燥状态参数的确定，使高纯碳酸钡产品质量明显提高，其中：w≤5？06，w(H2O)≤0.1%，完全满足PTC用户的要求。

Therefore, the basal research during the preparation of catalysts is very important and necessary.

因此， 铱催化剂制备过程中的基础问题进行研究是非常必要和重要的，对铱催化剂的制备有重要的指导意义。

The paper introduced the development and preparation of continuous basalt fiber .

介绍了连续玄武岩纤维的研发现状及连续玄武岩纤维的制备。

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％。