DISTRIBUTED PARAMETER NEURAL NETWORKS FOR SOLVING PARTIAL DIFFERENTIAL EQUATIONS

Novel distributed parameter neural networks are proposed for solving partial differential equations, and their dynamic performances are studied in Hilbert space. The locally connected neural networks are obtained by separating distributed parameter neural networks. Two simulations are also given. Both theoretical and computed results illustrate that the distributed parameter neural networks are effective and efficient for solving partial differential equation problems.     

S5钢TTT曲线及软化退火工艺的研究

采用日本Ｆｏｒｍａｓｔｏｒ－Ｄｉｇｉｔａｌ全自动相变分析仪测定了Ｓ５钢的临界点及退火用ＴＴＴ曲线的珠光体转变部分，并进行了软化退火工艺的试验，从而得出了最佳退火工艺。     

Organic Semiconductor Growth and Morphology Considerations for Organic Thin‐Film Transistors

Analogous to conventional inorganic semiconductors, the performance of organic semiconductors is directly related to their molecular packing, crystallinity, growth mode, and purity. In order to achieve the best possible performance, it is critical to understand how organic semiconductors nucleate and grow. Clever use of surface and dielectric modification chemistry can allow one to control the growth and morphology, which greatly influence the electrical properties of the organic transistor. In this Review, the nucleation and growth of organic semiconductors on dielectric surfaces is addressed. The first part of the Review concentrates on small‐molecule organic semiconductors. The role of deposition conditions on film formation is described. The modification of the dielectric interface using polymers or self‐assembled mono­layers and their effect on organic‐semiconductor growth and performance is also discussed. The goal of this Review is primarily to discuss the thin‐film formation of organic semiconducting species. The patterning of single crystals is discussed, while their nucleation and growth has been described elsewhere (see the Review by Liu et. al). 1 The second part of the Review focuses on polymeric semiconductors. The dependence of physico‐chemical properties, such as chain length (i.e., molecular weight) of the constituting macromolecule, and the influence of small molecular species on, e.g., melting temperature, as well as routes to induce order in such macromolecules, are described.     

Effect of γ-irradiation on phenolic compounds in rice grain

Whole grain rice is rich in phenolic compounds. The effect of γ-irradiation on the main phenolic compounds in the rice grains of three genotypes (black, red, and white) was investigated. Three phenolic acids (p-coumaric acid, ferulic acid, and sinapinic acid) were identified as major phenolic compounds in all rice samples, while two anthocyanins (cyanidin-3-glucoside and peonidin-3-glucoside) were identified in pigmented grain samples. In general, γ-irradiation at most of doses could significantly (p < 0.05) decrease total phenolic acid contents in all samples and total anthocyanins contents in the black rice, but their decreases were not completely in a dose-dependent manner. Unexpectedly, 6 and 8 kGy significantly (p < 0.05) increased total contents of anthocyanins and phenolic acids in black rice. This study suggested that suitable doses of irradiation might be carefully selected and used to minimise the loss of antioxidant phenolic compounds in whole grain rice during storage.     

某商务城钢结构建筑雪灾后检测鉴定

2008年中国南方地区普降大雪,导致许多钢结构房屋发生坍塌。对某商务城钢结构建筑在发生雪灾后进行检测与鉴定,根据检测及计算结果分析该结构倒塌原因。     

用测井资料求取钻井基础数据的方法

针对科学化钻井中存在的实际问题,以常规测井资料认识钻井地质环境因素为基础,采用理论研究和现场实践相结合的方法和技术路线.提出了利用常规测井资料求取钻井基础数据的新方法。实践证明,该方法能够快速而准确地实现对钻井地质环境因素的正确认识,并取得了较好的效果。     

SBS接枝胶的研究

以甲基丙烯酸甲酯和丙烯丁酯对ＳＢＳ进行接枝改性，研究了ＳＢＳ用量，引发剂浓度，单体配比，聚合温度，反应时间，增粘剂用量多种因素对胶液剥离强度的影响，所制得胶液用于粘接ＳＢＳ和皮类材料的９０°剥离强度最刘可达９１Ｎ／ｃｍ，可稳定在７０Ｎ／ｃｍ以上。     

潘家口水轮发电机组连轴工艺

大型水轮发电机组的主轴连接采用传统的工艺其工序复杂、劳动强度大、花费时间多，潘家口水电厂采用电热棒加热工艺解和连接主轴法兰，大大简化了主轴法兰的拆装工序，减轻了劳动强度，提高了工作效率。通过１号机组的拆装实践和一些试验，在预紧力、预紧量的控制，电加热的温度、加热时间、连轴销钉螺栓的伸长量膨胀量的测量及控制等方面，总结出一些有益的经验，可供水轮发电朵组安装和检修时参考。     

内循环冷却吸收装置的开发及应用

根据吸收操作的特点，开发设计了一种内循环冷却吸收装置。该吸收装置在合成氨厂使用中显示出了较高的吸收效率，取得了较好的经济效益。试验证明，该装置有利于碳化尾气的处理，能解决碳化“水平衡”问题。     

Toward better wireload models in the presence of obstacles

Wirelength estimation techniques typically contain a site density function that enumerates all possible path sites for each wirelength in an architecture and an occupation probability function that assigns a probability to each of these paths to be occupied by a wire. In this paper, we apply a generating polynomial technique to derive complete expressions for site density functions which take effects of layout region aspect ratio and the presence of obstacles into account. The effect of an obstacle is separated into two parts: the terminal redistribution effect and the blockage effect. The layout region aspect ratio and the obstacle area are observed to have a much larger effect on the wirelength distribution than the obstacle's aspect ratio and location. Accordingly, we suggest that these two parameters be included as indices of lookup tables in wireload models. Our results apply to a priori wirelength estimation schemes in chip planning tools to improve parasitic estimation accuracy and timing closure; this is particularly relevant for system-on-chip designs where IP blocks are combined with row-based layout