浅析疏水阀的选型及配管

介绍了蒸汽加热设备或管道的蒸汽疏水方式;简述了蒸汽管道疏水量的估算方法;总结了有关疏水阀选型、布置及配管等方面的设计经验。     

A constitutive model for saturated compacted soils under undrained shear condition

Abstract

In this paper, elasto‐plastic constitutive equations extended from theory of plasticity and based on laws of thermo‐dynamics were derived to predict the mechanical behavior of saturated geological media. Besides, these equations can also be adapted to form the stiffness matrix for finite element analysis on deformation and stress distribution in geotechnical engineering practice. The test data were obtained from compacted crushed mudstone under consolidated un‐drained triaxial tests with pore water pressure measurement. The preparation of the specimen was different from those which had usually been adopted. Hence, it is hoped that this study will throw some light on the constitutive equations applied on compacted geological media.     

Compression Stability of Reversed Austenite in 9Ni Steel

The effect of compressive stress on the stability of reversed austenite in 9Ni steel was investigated by uniaxial and hydrostatic compression.It was found that the uniaxial compressive pressure promoted the γ→α transformation,while the hydrostatic pressure suppressed the γ→α transformation.The pressure dependent transformation behavior can be explained according to thermodynamic analysis.     

Influence of Erosion and Deposition on Metallic First Mirror in HT-7 Tokamak

Dedicated experiments in the HT-7 tokamak were performed to investigate the in-fluence of erosion and deposition on the mirror samples.The first mirror (FM) samples made of polycrystalline (PC) stainless steel (SS),molybdenum (Mo) and tungsten (W) were fixed on a holder at an angle of 45 with respect to the horizontal plane and set at different locations with different connection lengths along the magnetic field.The optical reflectivity of the first mirror was measured by a spectrophotometer before and after plasma exposure.It was found that the surface morphology and specular reflectivity of the mirror samples after the exposure were different with respect to the different distances from the mirror surface to the last closed flux surface (LCFS) of the plasma in the tokamak.It was also found that shortening the connection length before the mirror surface would weaken the influence of the plasma erosion and impurity deposition on the mirror surface.In order to maintain the optical characteristics of the mirror surface,it is necessary to adopt the in-situ cleaning and mirror protection techniques.     

Adhesion energy can regulate vesicle fusion and stabilize partially fused states

Release of neurotransmitters from nerve terminals occurs by fusion of synaptic vesicles with the plasma membrane, and this process is highly regulated. Although major molecular components that control docking and fusion of vesicles to the synaptic membrane have been identified, the detailed mechanics of this process is not yet understood. We have developed a mathematical model that predicts how adhesion forces imposed by docking and fusion molecular machinery would affect the fusion process. We have computed the membrane stress that is produced by adhesion-driven vesicle bending and find that it is compressive. Further, our computations of the membrane curvature predict that strong adhesion can create a metastable state with a partially opened pore that would correspond to the ‘kiss and run’ release mode. Our model predicts that the larger the vesicle size, the more likely the metastable state with a transiently opened pore. These results contribute to understanding the mechanics of the fusion process, including possible clamping of the fusion by increasing molecular adhesion, and a balance between ‘kiss and run’ and full collapse fusion modes.     

Visual abstraction of dynamic network via improved multi-class blue noise sampling

Massive sequence view (MSV) is a classic timeline-based dynamic network visualization approach. However, it is vulnerable to visual clutter caused by overlapping edges, thereby leading to unexpected misunderstanding of time-varying trends of network communications. This study presents a new edge sampling algorithm called edge-based multi-class blue noise (E-MCBN) to reduce visual clutter in MSV. Our main idea is inspired by the multi-class blue noise (MCBN) sampling algorithm, commonly used in multi-class scatterplot decluttering. First, we take a node pair as an edge class, which can be regarded as an analogy to classes in multi-class scatterplots. Second, we propose two indicators, namely, class overlap and inter-class conflict degrees, to measure the overlapping degree and mutual exclusion, respectively, between edge classes. These indicators help construct the foundation of migrating the MCBN sampling from multi-class scatterplots to dynamic network samplings. Finally, we propose three strategies to accelerate MCBN sampling and a partitioning strategy to preserve local high-density edges in the MSV. The result shows that our approach can effectively reduce visual clutters and improve the readability of MSV. Moreover, our approach can also overcome the disadvantages of the MCBN sampling (i.e., long-running and failure to preserve local high-density communication areas in MSV). This study is the first that introduces MCBN sampling into a dynamic network sampling.     

基于位串内容感知的数据分块算法

针对基于内容的可变长度的分块CDC算法中数字签名计算需要耗费大量CPU开销的问题,提出了一种基于位串内容感知的数据块分块算法。算法利用每一次失败匹配尝试所带来的位特征信息,最大限度地排除不能匹配的位置,从而获得最大的跳跃长度,减少中间计算和比较的开销。实验结果表明,本算法减小了数据分块过程中数字签名计算的开销,降低了确定块边界时的CPU资源消耗,从而优化了数据分块的时间性能。     

Feature selection and hyper parameters optimization for short-term wind power forecast

Applied Intelligence - Accurate wind power forecasting plays an increasingly significant role in power grid normal operation with large-scale wind energy. The precise and stable forecasting of wind...     

光固化有机-无机杂化涂料制备工艺的理论研究

UV固化型有机-无机杂化涂料是新型高性能涂料的发展方向之一,该技术的关键是实现无机相和有机相的均匀分散。本文简要介绍了UV固化型有机-无机杂化涂料的常见制备方法及其特点,纳米粒子团聚的原因及相关的分散理论,并着重从理论上分析了运用共混法时影响粒子分散稳定性的一些因素:微粒本身、光敏树脂和单体、助剂、粘度、分散方式。