基于智能模糊控制策略的有源消声

有源消声是一种有效的低频噪声控制方法，由于空间有源消声过程具有时变性和非线性，传统的自适应算法不能进行很有效的控制。本文采用智能模糊控制策略，建立了基于智能模糊控制策略的有源消声系统，通过实验与传统自适应控制算法的消声效果作对比分析，证明智能模糊控制器不但控制速度快，易于实现，而且消声效果明显优于后者，具有较大的应用推广价值。     

碳钢高温变形后的静态软化行为

在形变温度为1133K、形变速率为2×10~(-3)s~(-1)的试验条件下,采用两段加载拉伸试验方法研究了0.4%C-1.5%Mn钢高温变形后的静态软化行为.调查了由两次加载拉伸变形时的屈服应力求得的静态软化率以及相对峰值应力比和峰值应变比随等温保持时间的变化.详细讨论了动态回复组织和动态再结晶组织对高温变形后的静态软化过程的影响.     

a—Si：H TFT电流—电压特性研究

本文发展了一种研究ａ－Ｓｉ：Ｈ ＴＦＴ电流－电压特性的新方法。基于局域态电荷密度解析统一模型，提出并深入分析了沟道区有效温度参数的概念，并由此推导出了ａ－Ｓｉ：Ｈ ＴＦＴ电流－电压特性的解析表达式。其理论值与实验值符合很好。该模型可用于ａ－Ｓｉ：Ｈ ＴＦＴ静态特性分析及其电路优化。     

利用假单胞菌天冬氨酸－β－脱羧酶高效生产L－丙氨酸

通过诱变筛选得到一株具有高活性Ｌ－Ａｓｐ－β－脱羧酶的菌株ＰｓｅｕｄｏｍｏｎａｓＮＸ－１，对该株酶形成和酶反应的条件进行了详细研究，该株可以高效地转化Ｌ－Ａｓｐ生成Ｌ－ＡＩａ，转化４～５山每Ｌ培养液可转化Ｌ－Ａｓｐ量高达１４００ｇ左右，生成Ｌ－Ａｌａ浓度高达９０％以上，摩尔转化率近１００％。     

Transformation Behaviour of Austenite in Steel under Condition of Stress-strain and Its Application

Austenite can be retained at ambient temperature in steels by alloying and processing control. The transformation from austenite to martensite occurs under a certain conditions : thermal or deformation. Stress-strain induced martensitic transformation is important to improve the plasticity of steels which is called transformation induced plasticity (TRIP). Strength-ductility balance of the steels is greatly superior to that of other high strength steels due to the TRIP effect. A new type of steels-TRIP steel is developed     

On delay-independent stability of large-scale systems with timedelays

A new criterion for delay-independent stability of linear large scale time-delay systems is deduced by employing an improved Razumikhin-type theorem and the m-matrix properties. An illustrative example is given to demonstrate the superiority of the obtained results to those in the literature     

新型太阳能空调节能窗的原理与结构

基于太阳辐射的光变特性和多层薄膜材料的变色效应，分析了新型太阳能节能窗对热候，冷候和温候空调的工作原理，重点讨论了可实现外加参量的动态调节透光性的薄膜材料的性能。     

激光冲击处理提高铝合金性能的研究

研究了高功率密度激光冲击处理对Ｌｙ１２ＣＺ铝合金力学性能的影响，研究结果表明激光冲击处理可大幅度提高铝合金的疲劳寿命，疲劳寿命的提高是由于微观组织中位错密度的明显增加，使得材料表层的强度和硬度也明显增加所致。     

碳酸盐岩薄储层横向预测方法

在对四川盆地川东大天池构造带的石炭系地层进行薄储层横向预测时.提出了一套模式化分析方法。此法以建工的储层序列地质模式为基础.利用测井曲线垂向分辨率高的特点.采用下同频率子波的合成地震记录,把地质、测井和地震资料有机地结合起来进行综合解释,对石炭系储层的顶、底界面及储层沉积微相进行了标定;同时研究了储层的物性变化。在该区,用上述方法对碳酸盐岩薄储层进行早期横向预测,取得了显著的地质效果。     

Location of the sacral pedicle, foramina, and ala on the lateral aspect of the sacrum: a radiographic study

Twenty-one adult dry-bone sacral specimens were used to quantitatively determine the location of the sacral pedicle, foramina, and ala on the lateral radiographic view of the sacrum. The anterior and posterior sacral foramina from S1 to S3, the midlines of the anterior sacrum and cephalad border of the S1 vertebral body, and the lateral limit of the lateral sacral mass were outlined with wires. A lateral radiograph was taken, and measurements were made directly from the radiograph. The average sacral pedicle height for both male and female specimens was approximately 20 mm for S1, 12 mm for S2, and 7 mm for S3. The sacral foramina height averaged approximately 13 mm for S1 and S2, and 10 mm for S3. The average ala and S1 body-ala angles were 88 degrees and 35 degrees. The distance from the ala tip to the anterior aspect of the sacrum averaged 12 mm, and the average anterior height of the S1 vertebral body above the ala was 11 mm. These measurements, in conjunction with inlet and outlet radiographs, may aid in the recognition of the vital structures of the sacrum on the lateral radiographic view and enhance the safety of dorsal sacral screw placement.