A mesh reconfiguration scheme for speeding up Monte Carlo simulations of electromagnetic scattering by random rough surfaces

Traditional methods of Monte Carlo simulations of random rough surface scattering that use the finite element method involve the generation of multiple meshes for the purpose of taking ensemble averages. We propose a mesh reconfiguration scheme that instead uses a single master mesh. The main idea is to locally modify only the air–surface interface region in the mesh for each instance of a random rough surface. This method achieves a four fold improvement in computation time without any loss of accuracy.     

泵送混凝土离心工艺优化的研究

通过泵送混凝土离心工艺优化试验,研究离心各级工艺参数对掌握管桩内部结构成型质量,改善混凝土分层现象,提高管桩成桩质量的重要作用。通过研究管桩实际生产过程,探讨泵送混凝土离心工艺优化研究的思路与方法。     

浅析高层建筑暖通空调设计的原则和方法

在发展中，空调设计紧跟时代的发展潮流，不断扩宽建设的具体思路，让设计符合现代化标准的同时，亦符合社会的政治、经济、文化发展。因此，应不断调动建筑的设计思路，把空调建设上升到一定的高度。     

Transfer bounds for linear feature learning

If regression tasks are sampled from a distribution, then the expected error for a future task can be estimated by the average empirical errors on the data of a finite sample of tasks, uniformly over a class of regularizing or pre-processing transformations. The bound is dimension free, justifies optimization of the pre-processing feature-map and explains the circumstances under which learning-to-learn is preferable to single task learning.     

朔州市民众环保意识及环保行为调查分析

针对朔州市民众环保意识及环保行为进行了调查分析，通过采用面对面、合作单位组织派发问卷的调查方式，总结得出了朔州目前所面临的主要环境问题及民众的态度和看法，在此基础上，对政府提出了相应建议，以期改善朔州市环境质量。     

The applicability of interactive item templates in varied knowledge types

A well-edited assessment can enhance student’s learning motives. Applicability of items, which includes item content and template, plays a crucial role in authoring a good assessment. Templates in discussion contain not only conventional true & false, multiple choice, completion item and short answer but also of those interactive ones. Methods provided for answering interactive question can be click and select, drag and drop, collide, and magnetize, while operational interactive templates can include Link, Match, Classification, and Order.     

Weight loss of frozen bread dough under isothermal and fluctuating temperature storage conditions

Evaporative weight loss from food leads to both loss of saleable weight and quality deterioration so it need to be minimized. The effect of isothermal and fluctuating conditions on frozen dough weight loss was measured and compared with kinetic, physical and artificial neural network (ANN) models. Frozen dough samples were regularly weighed during storage for up to 112 days in loose-fitting plastic bags. The storage temperatures were in the range of −8 to −25 °C with fluctuations of ±0.1 °C (isothermal), ±1, ±3 or ±5 °C about the mean. For each combination of temperature and fluctuation amplitude, the rate of dough weight loss was constant. The rate of weight loss at constant temperature was nearly proportional to water vapour pressure consistent with standard theories for evaporative weight loss from packaged foods but was also accurately fitted by Arrhenius kinetics. Weight loss increased with amplitude of temperature fluctuations. The increase could not be fully explained by either the physic model based on water vapour pressure differences or the kinetic model alone. An ANN model with six neurons in the input layer, six neurons in hidden layers and one neuron in the output layer, achieved a good fit between experimental and predicted data for all trials. However, the ANN model may not be accurate for product, packaging and storage systems different to that studied.     

二维寄生电容参数的对偶离散几何法提取

寄生电容参数提取是集成电路领域的关键课题,也是典型的静电场问题之一。通过研究电磁场对偶离散几何法, 探讨在二维非结构化网格离散空间上相应的寄生电容提取算法, 其中重点考察其对偶特性以及能量互补特性。基于该特性,同时采用对偶的两种方法能够有效地消除网格离散带来的误差,比采用单一方法更快地逼近真实解,从而可发展出静电场能量快速算法。并从理论与实例两方面将其与对偶有限元法实施分析对比。离散几何法采用对偶两套网格上的标量电势作为未知量,具有简单的形式与良好的精度,有望成为相关领域的一种主流方法。     

浅析分体挂壁式室内机扫风电机安全要求

本文依据家用和类似用途电器的安全标准,结合产品结构,浅析分体挂壁式空调室内机扫风电机安全要求,同时,根据标准的要求提供一些设计方案,供相关人员参考。     

Congestion management in power systems – A review

In the past few decades, restructuring has overtaken all possible domains including the electric supply industry. Restructuring has brought about considerable changes by the virtue of which electricity is now a commodity and has converted into deregulated one. Such a competitive market has paved way for innumerable participants. This has led to overloading and congestion of transmission lines. Moreover, open access transmission network has ingenerated a more intensified problem of congestion. Thus, congestion management in power systems is germane and of central importance to the power industry. In this paper a review work is carried out to unite all the publications in congestion management.