性能

Tests on road performance of SMA mixture with terylene long fiber and xylon fiber were conducted at both high temperature and low temperature. It was found that the resistances of lignin fiber to asphalt run-off, deflection at high temperature, and water damage were higher than those of terylene long fiber, while the effects of lignin fiber and terylene long fiber on anti-dispersion loss performance and anti-cracking performance at low temperature were basically similar.

通过沥青混合料路用性能试验，研究了涤纶长纤维与木质素纤维对SMA混合料高、低温等路用性质影响，发现同等掺量情况下，木质素纤维对SMA混合料抗析漏性能、抗高温变形性能和抗水损害的贡献好于涤纶长纤维；而二者对混合料的抗飞散损失性能和低温抗裂性能的影响基本相同。

A good balance between the dynamic property and the thermal-oxydative ageing property on the blend vulcanizates were obtained when curing system is SEV and the S/CZ/DM ratio of 1.5/1.5/0.5;There was a good balance among tensile strength and heat build-up and damping property on blend vulcanizes filled with moderate size carbon black;The mechanical properties of vulcanizate filled with N660/N330 and N660/N990 were medium between two carbon black filled individual.

补强填充体系对NR/ENR硫化胶的性能有较大的影响，选择粒径适中的炭黑品种N660作为补强剂，硫化胶在拉伸强度、疲劳生热和减震方面可以获得较好的平衡；N660/N330和N660/N990两种填充体系硫化胶的力学性能，基本上是单用一种炭黑所得硫化胶力学性能的加权平均；N660/白炭黑(40/20)和N660/碳酸钙(45/15)填充体系硫化胶的力学性能与相同用量下N660单用时的相当，而N660/陶土填充体系硫化胶的力学性能较差。

The results show that:(1) The penetration resistance of functionally graded layered armour made of metal Matrix Composites is better than that of the Aluminum plate;(2) The penetration resistance of the functionally graded layered armour whichlay_up is 0%/57%/0%/26%/0%/12%/0% is the best;(3) The resistance penetration of the the functionally graded layered armour can be greately promoted through optimizing the lay_up and volume fraction of the reinforced particle;(4) The functionally graded armour in which the particles distribute continuous has better behavior of resistance penetration when the volume fraction of the reinforcements are constant;(5) The higher volume fraction of the reinforcements at the surface of FGM and the more non-homogeneous the reinforcements distribution, the higher thesurface Youngs Modulus and the flow stress are;(6) The behavior of penetration resistance of the functionally graded armour in which the particles distribute continuously is better than that of homogeneous steel plate;(7) The functionally graded armour provedes a important approach for the optimization and design of the resistance penetration;(8) The numerical results of simulation of the bird striking the aircraft structureshow that the finite element model of the balance leg is effective;(9) The numerical results show that the structure internal force is relative largewhen the bird strikes the top of the balance leg;(10) The process of the birdstrike is thaf.after the bird penetrting through the front skin of the balance leg and striking the front beam,the bird is broken up in three parts.

经过本文所进行的数值模拟后我们发现：(1)在层状梯度装甲板的抗侵彻过程中层状功能梯度板比铝板的抗侵彻性能好；(2)在层状梯度装甲板的抗侵彻过程中铺层顺序为0%/57%/0%/26%/0%/12%/0%的功能梯度装甲板的抗侵彻性能最好；(3)通过优化组合层状梯度板的铺层顺序以及增强颗粒的含量可以大大改善梯度板的抗侵彻性能；(4)当SiC颗粒体积含量一定时，增强颗粒连续分布的功能梯度板表现出了优越的抗侵彻性能；(5)增强颗粒连续分布的功能梯度板表面SiC颗粒体积含量越高，分布越不均匀，表面的弹性模量就越高，屈服应力就越高；畜此工业大学硕士研究生学位论丈(6)增强颗粒连续分布的功能梯度装甲板比匀质钢板表现出良好的抗侵彻性能；(7)功能梯度装甲板为整个抗侵彻性的优化设计提供了重要的途径。

Firstly, take polyester short fiber, nylon short fiber and cotton powder short fiber for examples, a study was made on the influence of content and kind of short fibers on physical and heat aging properties of short fiber-CR composites. The experiment results showed that the rigidity of the composite increased as the content of the fiber increased, and the tear strength, the modulus at 20% in L direction also increased; thereinto, the reinforcement effect of nylon short fiber was the best, and the cotton powder short fiber was the worst.

第一，以聚酯短纤维、尼龙短纤维、棉粉短纤维为例，研究了短纤维的用量和种类对短纤维-氯丁橡胶复合材料力学性能、耐热性能及其溶胀性能的影响；结果表明，随纤维含量的增加，短纤维-CR复合材料的硬度不断增大；在L向拉伸时，撕裂强度、定伸应力不断提高；尼龙短纤维的补强效果优于其它两种，棉粉短纤维的最差；随纤维含量增加，短纤维-CR复合材料整体耐热老化性得到了极大提高，其中尼龙短纤维-CR复合材料的耐热老化性明显优于其它两种；随纤维含量的增加，短纤维—CR复合材料的耐溶胀性能明显提高；短纤维-CR复合材料的性能呈现明显的各向异性。

Firstly, the principle and method of designing the combustion characteristics ofsmall grain-binding high-burning-rate propellant are analyzed and discussed, theburning behaviors and energy characteristic of the component content and binder andsmall grain propellant are respectively calculated by the estimating burning rateprocedure based on the chemical structure and characteristic of propellant, and theREALthermodynamics system software. The selection principle of component contentwhen designing the burning behavior and energy characteristic is analyzed.

首先，分析讨论了小球粘结高燃速推进剂燃烧性能设计原理及方法，采用基于推进剂化学结构与特征反应关系的燃速预估程序和REAL热力学系统软件分别计算了组分含量与黏结剂和小球药燃烧性能、能量性能的关系，分析了推进剂燃烧性能、能量性能设计时组分含量的选择原则。

Research and applications of maraging steels were introduced in many respects, especially the mechanical properties such as the mechanical properties, welding properties and corrosion properties. The influences of heat treatment, ratio of constituents and processing technology to the properties were discussed.

本文详细介绍了马氏体时效钢的力学性能、焊接性能和腐蚀性能等性能，以及热处理、成分配比、加工工艺对这些性能的影响，并介绍了国内外对其研究的近况。

A great lot of facts indicate that the navigation performance of ships is good in quiet water, but not always good in waves. Whether the performance of ships is superior or inferior mainly depends on their performance in waves. The seakeeping of ships has become an important criterion which can scale the navigation performance of ships.

大量事实表明，一艘在静水中航行性能优良的船舶，在波浪上的航行性能并不一定是优良的，船舶性能的优劣，主要看它在实际海洋环境中的性能，船舶耐波性的好坏已成为衡量现代化船舶航行性能的重要衡准之一。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

Ignition performance, off the performance, combustion gas proportional valve capacity is a measure of the performance level of the main technical indicators, namely the import and export mapping proportional valve pressure (P2-P2) performance curve, outlet pressure and coil current (P2-I) curve, current and flow curve, and the data of these curves is proportional valve performance testing gas key.

点火性能、熄灭性能、燃烧能力是衡量燃气比例阀性能高低的主要技术指标，截止阀即测绘比例阀进出口压力（P2-P2）性能曲线、出口压力与线圈电流（P2-I）曲线、电流与流量曲线，以及这些曲线有关数据，是燃气比例阀性能测试的关键。

In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM喂料注射成形性能研究方面，针对毛细管流变仪测试法衡量流动性能的不足，提出使用螺旋线模具测试喂料熔体的注射成形性能，创造性地设计了一套可快换浇口，模腔封闭的螺旋测试模，并在螺旋测试模上采用正交实验设计，得出了高密度重合金喂料流动长度L_m的回归公式，揭示了L_m随Q_m、P_m、△T_m和凡的变化规律，并得出工艺参数对成形性能影响的强度顺序为Qm最大，尸m与△几其次，因而改善喂料流动性能应优先控制注射速率Qm。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。