乳胶漆实用技术讲座：聚合物乳液检测方法

乳胶漆实用技术讲座：聚合物乳液检测方法朱传（北京东方化工厂）Ｔｈｅｔｅｓｔｍｅｔｈｏｄｓｆｏｒｉｎｓｐｅｃｔｉｎｇｔｈｅｑｕａｌｉｔｙｏｆｔｈｅｐｏｌｙｍｅｒｅｍｕｌｓｉｏｎｓ￥ＺｈｕＣｈｕａｎ－ｑｉＡｂｓｔｒａｃｔ：Ａｐａｒｔｏｆｔｈｅｓｙｓｔｅｍ...     

Pruning Redundant Alarm Correlation Patterns

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｔｉｃｋｉｎｇｐｏｉｎｔｏｆａｓｓｏｃｉａｔｉｏｎｒｕｌｅａｌｇｏｒｉｔｈｍｓｄｅｐｅｎｄｓｏｎｅｆｆｅｃｔｉｖｅｌｙｆｉｎｄｉｎｇａｌｌｃｏｒｒｅｌａｔｉｏｎｐａｔｔｅｒｎｓｔｈａｔｓａｔｉｓｆｙｖａｌｕｅｒｅｑｕｉｒｅｍｅｎｔｉｎｔｈｅｍａｇｎａｎｉｍｉｔｙｏｆｄａｔａ.Ｂｕｔｔｈｅａｌｇｏｒｉｔｈｍｓａｌｓｏｂｒｉｎｇａｎｅｇａｔｉｖｅｅｆ ｆｅｃｔ:ｔｈｅｎｕｍｂｅｒｏｆａｓｓｏｃｉａｔｉｏｎｒｕｌｅｓｉｓｖｅｒｙｌａｒｇｅ.Ａｌｓｏｉｎｆｏｒｍａｔｉｏｎ…     

The Research of ST-OFDM in Physical Layer of IEEE 802.16a

This paper briefly introduces one of the three physical layer implementations of IEEE 802.16a~[1],WirelessMAN-OFDM PHY.Based on the implementation,the combination of Orthogonal Frequency Division Multiplexing(OFDM)and Space-Time Coding(STC)which is briefly called ST-OFDM in IEEE 802.16a,is investigated under thechannel provided in Ref.[2].Especially,this paper is focused on the influence of the optimal decision threshold on the sys-tern Bit-Error-Rate(BER)performance based on unequal probabilities of sources.The simulations show that when Signal-Noise-Ratio(SNR)is low the optimal decision threshold is obviously superior to the usual one;when SNR is high to someextent,such as 10 dB for 4QAM and 16 dB for 16QAM,we can use the usual decision threshold instead of the optimal     

全方位开拓丙烯酸系列涂料──推广水性金属维护涂料

丙烯酸树脂漆是继醇酸树脂漆之后的又一类具有通用性能的合成树脂涂料。对丙烯酸树脂漆的这种定位，早有共识。丙烯酸树脂漆有那么多各不相同的品种，各类品种又表现出那么优异的性能，正是在这个基础上，早在二、三十年前，国外就有人断言，有朝一日，丙烯酸树脂漆将会超越醇酸而在产量上居合成树脂涂料的首位。这种预言，虽然迄今未成事实，但在此期间，丙烯酸树脂漆确也取得了长足的进展。在发达国家中，丙烯酸树脂漆的产量已稳居合成树脂涂料的第二位；其应用得到了全方位的普及，在某些方面，其应用还有了超越于醇酸的延伸。所谓全方位…     

Exploration of Linked Anomalies in Sensor Data for Suspicious Behavior Detection

We present a visual analytics system to understand the operation data of a company, GAStech, from IEEE VAST Challenge 2016. The data include proximity data recording the locations and movements of employees, and heating, ventilation, and air conditioning (HVAC) data recording the environmental conditions in the building. Analyzing the data to detect the suspicious behaviors of some disgruntled employees is of special interest. Our system provides coordinated multiple views to visualize the proximity data and the HVAC data over time. Visual hints and comparisons are designed for users to identify abnormal patterns and compare them. Furthermore, the system automatically detects and correlates the anomalies in the data. We provide use cases to demonstrate the effectiveness of our system.     

乳胶漆粘结剂（续一）

乳胶漆粘结剂（续一）朱传　（北京东方化工厂）Ｔｈｅｂｉｎｄｅｒｓｆｏｒｌａｔｅｘｐａｉｎｔ￥ＺｈｕＣｈｕａｎ－ｑｉＡｂｓｔｒａｃｔ：Ｔｈｉｓｉｓｔｈｅｓｅｃｏｎｄｐａｒｔｏｆａｎａｒｔｉｃｌｅｗｉｔｈａｎａｉｍｔｏｐｏｐｕｌａｒｉｚｅｔｈｅｋｎｏｗｌ...     

Corrosion behavior and mechanism of the automotive hot-dip galvanized steel with alkaline mud adhesion

The corrosion behavior and mechanism of hot-dip galvanized steel and interstitial-free (IF) substrate with alkaline mud adhesion were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), and linear polarization. The results show that non-uniform corrosion occurs on the galvanized steel and IF substrate during 250 h with the mud adhesion. The corrosion products on the galvanized steel are very loose and porous, which are mainly ZnO, Zn5(OH...     

建筑涂料水性化谁主沉浮

介绍建筑涂料水性化。从五十年代至今发展的必然性和存在的优势是显而易见。但其产品品种单一，质量不尽人意，其中存在一哄而上，技术实力不一等问题，而在我们涂料工业中却未能引起重视。建筑涂料水性化既为发展方向，必由我们涂料工业担当此任，为未来发展应发挥主力军作用。     

Mathematical Advancement of General Chlorine Bulk Decay Model

An accurate chlorine bulk decay model is needed to ensure that potable water meets the microbial and the chemical safeties at the treatment plant and throughout the distribution. Among the mathematical models available,the general second-order chlorine bulk decay model( GBDM) is the most fundamentally sound.Application of the GBDM,however,has been hindered by its numerous fictive parameters and lack of an analytical solution. This theoretical work removes the two obstacles. The GBDM is solved through transformation and integration. The analytical solution provides deep insights into the GBDM and facilitates the parameterization and sensitivity analysis. The background natural organic matter( NOM) is characterized with the probabilistic distribution of functional groups. It reveals that the mean of the function group distribution is correlated with the initial chlorine decay rate coefficient( κ_0). A simple formula is developed to determine κ_0 directly from the initial chlorine decay. The theoretical treatment reduces the fictive parameters to a minimum. For the common lognormal distribution,the GBDM needs only three parameters,well defined as initial chlorine demand X_0,median rate coefficient km,and heterogeneity index σ. For more complicated scenarios,composite distributions are constructed through superposition of individual distributions. A highlighted example is to predict chlorine decay in blends of different waters. With the theoretical and mathematical advancement here,the GBDM can be applied effectively to any reactive background matter in any reaction systems.     

Experimental Study of Electrodes Parameters Effects on Small Diffusion Combustion Flame

To study the configuration and conductivity effects on micro?scale methane?air flames by electric field and iron wind, different electric field forces and iron winds are generated by needle, circle and...