纳米粉及添加剂对压电陶瓷材料性能的影响

采用高能球磨法研磨出PZT-5纳米粉料，添加外购的纳米有机添加剂，按照传统的固相工艺法制备出了压电陶瓷材料，研究分析纳米粉料和纳米有机添加剂对压电陶瓷性能的影响。通过测试分析可以看出，纳米压电粉料与纳米有机添加剂的综合作用，降低了材料的烧结温度、相对介电常数εr,Qm值和以d31，提高了压电应变常数d333，从而压电电压常数g33、gh、dh成倍提高，这些对制作宽带、高灵敏度的换能器是很有好处的。     

小波分析与漏磁检测信号处理

详细介绍了小波分析的基本理论,并将其引入到钢管漏磁探伤信号的分析中,可以去除噪声、压缩数据和检测奇异性,而且为缺陷的定性和定量分析提供了新的判定方法.     

Synthesis and electrochemical properties of Th-doped LiMn2O4 powders for lithium-ion batteries

To improve the cycle performance of eco-friendly and cost-effective spinel LiMN2O4 as the Li secondary batteries, the Th-doped LiThxMn1-xO4 spinel powers were synthesized by solid-state method. The starting materials, Li2CO3,MnO2 and Th(NO3)4·4H2O, were mixed uniformly using a traditional ball milling, which resulted in a uniform particle size distribution in the mixed powers. Tests of X-ray diffraction, SEM, impedance spectra and charge-discharge were carried out for LiThxMn1-xO4 cathode materials. Results show that the synthesized LiTh0.01Mn1.99O4 material exhibits standard spinel structure, regular particle morphology and excellent property of charge-discharge for big current. The capacity retention of the material modified by doping Th is more than 85.1% of the first discharge specific capacity of 111.5 mAh·g -1 after 20 cycles at the current rate 1C, while the pristine LiMN2O4 is only 57% of the first discharge specific capacity of 110.2 mAh·g-1 after the same cycles at the same current rate.     

论高校管理创新的路径

高校教育教学活动总是在管理过程中进行的，其创新从一定意义上取决于高校管理的创新。就其创新的路径而言，应从管理理念上实现从物本管理向人本管理转变，从管理职能上实现从控制型管理向服务型管理转变，从管理组织上实现从垂直管理向扁平管理转变，从管理方式上实现从经验管理向制度管理转变，从管理机制上实现从维持学校向经营学校转变，这些路径是一个相互联系、相互影响的有机整体。     

有滞后环节的系统的闭环鲁棒辨识方法

提出一种新的针对带滞后环节的任意阶系统的闭环辨识方法。通过“三步法”，实现在闭环条件下的被控制对象的传递函数参数的辨识，所提出方法具有很强的鲁棒性。仿真例子表明该方法的有效性。     

B113－2型低汽／气比CO高温变换催化剂的研制

介绍了Ｂ１１３－２Ｍ低汽／气比ＣＯ高温变换催化剂的研制方法及其特点．实验室测试表明，Ｂ１１３－２型催化剂具有堆密度低、运行强度高、选择性好、抗沸水性能优、本体含硫低及低温活性好等优点．     

Preparation of fluoroacrylate nanocopolymer by miniemulsion polymerization used in textile finishing

Latex based on fluoroacrylate (TAN) and other comonomers was prepared via miniemulsion polymerization in the presence of stearyl trimethyl ammonium chloride (STAC) and 2, 2′‐azobis (2‐amidinopropane) dihydrochloride (ABAP) as a water soluble initiator. Light transmittance studies demonstrated that the light transmittance of prepared emulsions increases with the amount of TAN, STAC, cosolvent DPM, and hydrophobe DM. Given suitable reaction temperature and quantities of TAN, STAC, DPM, and DM, a copolymer emulsion of fluoroacylate with a particle size of 50 nm was produced. The water repellency tested on polyester fabrics displayed greater effectiveness than that of commercial products with higher fluorine content. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1466–1472, 2004     

Synthesis of Dimethyl Carbonate from Methanol and Carbon dioxide using Potassium Methoxide as Catalyst under Mild Conditions

Pd-supported on WO₃–ZrO₂ (W/Zr atomic ratio=0.2) calcined at 1073 K was found to be highly active and selective for gas-phase oxidation of ethylene to acetic acid in the presence of water at 423 K and 0.6 MPa. Contact time dependence demonstrated that acetic acid is formed via acetaldehyde formed by a Wacker-type reaction, not through ethanol by hydration of ethylene.     

和田菟丝子在不同寄主中有效成分含量的测定研究

采用高效液相色谱法(HPLC)对和田菟丝子中槲皮素和山萘酚进行了定量测定。测定寄主为胡麻植物的菟丝子中槲皮素含量为0 239 mg·g-1,山萘酚的含量为0 347 mg·g-1 ;寄主为苜蓿的菟丝子中槲皮素含量为0 103 mg·g-1,山萘酚的含量为0 068 mg·g-1。和田菟丝子寄主不同,其槲皮素和山萘酚的含量不同,应结合寄主植物研究其有效成分。