Preparation of Polypropylene with High MFR β Crystalline Form

Discussion on the Process for Producing PP with High MFR

论聚丙烯高熔融指数（MFR）产品的生产工艺

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According to the high molecular theory, the molecular weight and molecular weight distribution can be showed by MFR.

借助高分子理论，指出以MFR值表征分子量及分布的可行性；

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The join of fire retardant increase the melt flow rate ( MFR), make forming more convenient.

阻燃剂的加入提高了熔体流动速率（MFR），使成型加工比较方便。

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In this thesis, this method is applied to monitor the melt flow rate ( MFR) of polypropylene. The simulation results demonstrate the effectiveness of this method.

该递推方法用于对聚丙烯熔融指数的监控，仿真结果表明的该方法的有效性。

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It was that found it was proper that the flow ability was characterized by MFR and the deformation ability was characterized by dynamic viscosity.

发现对色母粒这类特殊体系，其流动能力和变形能力之间存在很大的区别；

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Taking the utilizing rate of irrigation water as the core and according to plant physiology and ecology and growth of trees, the theory and technology of water saving irrigation in Populus tomentosa intensive plantation was studied systematically for eight years in succession.

以提高灌溉水利用率为核心，以植物生理学和生态学以及树木生长为依据，连续8年对毛白杨速生丰产林节水灌溉的理论与技术进行了较为系统的研究。

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By taking the performance rate that electric dust collector compared reverse-cellar as the assessing index of objective management, carrying out the necessary measure and arousing the enthusiasm of responsible person, could decreased the dust emission into full play.

生产实践中将电收尘器相对回转窑的运转率作为电收尘器目标管理的考核指标，落实配套措施，调动岗位人员的工作积极性，最大限度地减少出口粉尘的排放。

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So that, in light of the evaluation objects, factor set and targets, by taking soil corrosion rate as reference factor, a new thought on determining the weights by use of the grey subordinatenesses of various factors is proposed;

因此，根据评价对象、评价因素集及评价目标，提出了以土壤腐蚀速率为参考因素，运用各因素的灰色关联度确定其权重的新思路；

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It uses double resolutions of wavelet in time& frequency domains and the nonlinear fitting ability of neural network to compress practical disturbance signals, taking the compression rate and root mean squared error as evaluation indices.

利用小波时域和频域的双重分辨率和神经网络的非线性函数逼近能力，以压缩比、均方误差为压缩效果的评价指标，对实际扰动信号进行数据压缩。

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Methods: Taking moisture absorption rate as measure index, various facters effected the moisture absorption rate, and the optimal coating process can be selected with well disturbed uniform design and computer analog test.

方法：用吸湿率为考察指标，研究了包衣过程中，影响包衣颗粒吸湿率的各因素，用均匀设计和计算机模拟实验选择了最优包衣工艺。

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The Danish central bank took this step one stage further, taking its deposit rate into negative territory for the first time, imposing a 0.2 per cent annual charge on certificates of deposit.

丹麦央行则更进一步，首次将其存款利率降为负值，对存款收取0.2%的年度收费。

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Taking maximum production rate, minimum manufacturing cost or maximum profit rate as objective functions and considering main restrictive conditions of practical machining, the mathematical models of optimization of hobbing parameters are established respectively.

本文分别以最大生产率（最短加工时间）、最低加工成本和最大利润率为目标，考虑实际加工中的主要约束条件，建立滚齿加工参数优化数学模型；

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It is pointed out that the testing conditions of plastics properties should near the production and application conditions as far as possible by taking melt flow rate ( MFR) for an example.

以熔体流动速率为例，阐述塑料性能测试条件应尽量接近生产和使用条件。

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By using the orthogonal experiment method, and taking material removal rate and surface roughness value respectively as the aim, the best combination of process parameters has been received under the given test condition.

用正交试验的方法，分别以材料去除率和表面粗糙度值为目标，得到了在给定实验条件下的最优工艺参数组合。

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Striping is new problem for imaging spectroradiometer data, which is obtained by multi sensor scanning on spacecraft. And utilizing. By taking the mutation rate of E.

图像条带是成像光谱仪采用多元并扫方式获取遥感数据而引起的新问题之一。

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Taking the germination rate higher than 80% as the criterium for the end of dormancy, the dormant period of Chinese cabbage seeds last 35 days.

以发芽率高于80%为通过休眠的标准，则早熟5号和早熟6号大白菜的休眠期为35天。

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On the Arithmetic Labels of Some Unions of Paths and Cycles By taking the mutation rate of E. And utilizing. Circle of Friends

路和圈并图的算术标号

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No matter what circumstances, fracture injection technology can improve recovery at a large extent compared to taking into injection rate decline and have broad application prospects.

不论何种情况，与考虑注入量下降情况相比，裂缝扩展注水技术能够大程度提高采出程度，有着广阔的应用前景。

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By taking power consumption rate as an optimization objective, mathematic models of ball mill optimization design have been established and the corresponding program written.

以电耗率最低为优化目标建立了钢球磨煤机优化设计的数学模型，并编制了相应程序。

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RESULTS& CONCLUSION: Taking either unrecurrencc rate or survival rate as standard, the BCG vaccine scheme is the best.

结果与结论：无论以未复发率为标准，还是以生存率为标准，应用卡介苗治疗均为最佳方案。

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