粉煤灰的理化性质及其资源化的现状与展望

粉煤灰是火力发电厂的主要废弃物，其产量大、占地多，易形成扬尘，并污染地下水，造成严重的环境问题。本文介绍了粉煤灰的物理化学性质及特点，及其国内外的资源化利用现状，并从工业建筑、农业利用和环境影响与污染治理的三个方面做了分析与探讨，最后对粉煤灰的未来利用发展作了展望。     

基于语义网络的方案设计过程表达与推理

从基于机械运动方案设计的表达方法必须能支持概念设计全过程的思想出发，提出计算机辅助概念设计系统必须能够表达设计方案、产生方案、产生多个方案和确定最优方案．根据方案表达方法应具备的基本功能要求，选用语义网络技术表达设计方案过程、工艺动作、机构及其相互间的关系，通过对设计方案中机构时间配合及其影响的表达和调整实现了方案设计运动循环图表达的计算机辅助化．利用基于语义网络表示的不确定性推理技术构造待求问题的语义网络片断，通过已有设计实例与设计要求的属性值与属性值、属性值与属性值域、属性值域与属性值域三者的匹配比较构造贴近度计算公式，并对工业平缝机中的挑线机构进行了机构选型．实例证明了击模型的正确、实用性．     

硅酸盐中Si—O~(br)键与Si—O~(ter)键相对强度的量子化学研究(英文)

用ab-initio法对硅氧烷及硅酸分子的研究指出,在硅酸盐中,由于电子的局域性,体系的总能量可以向结构单元或双中心分割:从而可以得到Si-O~(br)比Si-O~(ter)更稳定。用这些结果可以解释硅酸盐的许多性质。     

嵌入式智能动平衡测试系统及其滤波器设计

针对动平衡测试中要求实时处理大量信息，而现有的基于间独微控制器的智能动平衡测试仪和动平衡机控制箱不易满足该要求的情况，提出了一种将DS－－微控制器组对直接应用于智能动平衡仪中子系统设计的方法。介绍了这种方法实现及其数字滤波器的设计，该方法是将DSP与微控制器（即单片机）组成一对主从控制系统，微控制器作为主控器完成全局控制，而利用DSP的快速运算特点来实现支平衡的数字滤波、FFT等。根据该方法所开发的系统可以在动平衡测试中作更多的时域、频域项分析。     

域变换结合参数估计干扰对消的智能天线算法

CDMA系统中的多址干扰是影响系统性能的主要因素，提出了一种新的域变换结合参数估计抗多址干扰的算法。同文献[1]中的方法相比，在具有相似的误码率性能的基础上，具有更快的收敛性能。     

Archaeal acylamino acid releasing enzyme/lipase:Crystallization and preliminary crystallographic analysis in a new crystal form

A primitive orthorhombic crystal form of acylamino acid releasing enzyme‘lipase(APE1547)from hyperthermophilic archaeon Aeropyrum pernix strain K1 has been obtained at 291K.The diffraction pattern of the crystal extends to 0.27nm resolution at 100K using Cu Kαradiation.The crystal belongs to the space group P212121 with unit cell dimensions of b=6.399,b=10.439and c=16.953nm.The presence of two molecules per asymmetric unit gives a crystal volume per protein mass(Vm)of 0.0022nm^3 Da^-1 and a solvent content of 43% by volume.A full set of X-ray diffraction data were collected to 0.3nm from the native crystal.     

Cryptomelane（KxMn8-xO16）： Natural active octahedral molecular sieve（OMS-2）

The Xiangtan manganese deposit (XTM) used to be considered a supergene oxide manganese ore in South China. We reported a new identification of the naturally outcropping cryptomelane by examining the physical, chemical and structural features of the XTM supergene oxide manganese ore. The MnO2 content was over 90%, K2O more than 3%, and water from 2.2%-3.1% which is similar to one in zeolite. The cell parameters of the cryptomelane were given as a0 = 0.9974 nm, b0 = 0.2863 nm, c0 = 0.9693 nm and β= 91.47°. There was a larger pseduotetragonal tunnel in the natural cryptomelane that was formed by [MnO6] octahedral double chains with aperture of 0.462×0.466 nm2, filled with K cations resulting in some Mn3+ substituting for Mn4+ to balance the negative charges of structure. The finding is important not only for prospecting manganese resources in South China, but also in application of octahedral molecular sieve of natural cryptomelane as that developed in the tetragonal molecular sieve of natural zeolite o     

Advances in identification and application of tumor antigen inducing anti-cancer responses

Tumor antigen is one of the important bases of tumor immunotherapy . With the discovery of novel tumor antigens, interest in specific immunotherapy for treatment of malignancies has increased substantially. Nowadays more and more scientists paid close attention to various tumor antigens with their roles or/and applications in anti-cancer immune responses, immune tolerance, tumor markers,     

Combustion energies and standard molar enthalpies of formation for the complexes of the first-row transitional metal chlorides withL-α-histidine

Seven novel solid complexes of the first-row transitional metal with L-α-histidine were synthesized, and their compositions were determined. The constant-volume combustion energies of the complexes were measured by a precision rotation bomb calorimeter. The standard molar enthalpies of combustion and the standard molar enthalpies of formation were calculated. The results indicated that the plots of the standard enthalpies of formation against the atomic number of the metal show a regularity of zigzag.     

Stress corrosion cracking and its anisotropy of a PZT ferroelectric ceramics

It is known that some types of ceramics, like Al2O3 and ZrO2, undergo stress corrosion cracking (SCC) or static fatigue fracture under static loading, ever in a rela-tively mild environment, such as moist atmosphere or water at room temperature, which leads to a time-dependent fracture[1—4]. For a transmission electron microscopy specimen of YBa2Cu3O7-x ceramics superconductor, SCC induced by residual stress can occur in an atmosphere with low moisture content[5]. For a lead zirconate ti…