增强聚丙烯电流线圈架成型工艺与注射模设计

针对制品两面抽芯的特点，通过比较分析制定了模具的侧向分型与抽芯结构形式。采用能解决一模两腔的两面抽芯问题的斜导柱滑块结构的模具结构．设计出电流线圈架注射模模具。经生产实践验证．该模具结构设计合理．型腔数目合适，分型面正确，抽芯动作平稳可靠，制品质量符合设计要求。     

双氧水生产装置应用变频调速的节能改造技术

本文简述了在双氧水生产装置上应用变频调速技术对物料输送系统改造，实现有效节省能耗，降低生产成本，提高生产效率。     

基于现有结构的空压机的改造设计

针对无法完全发挥效能的某厂二手空压机设备 ,结合厂方提出的改造目标 ,提出可在现有总体结构布置的情况下 ,采用通流能力好的三元叶轮、增加流道宽度等措施进行结构改造。经编制热力设计程序进行分析计算 ,结果表明这一方案切实可行     

气相色谱法测定1,1-二氯-1-氟乙烷

研究了HCFC - 14 1b的气相色谱分析 ,色谱柱为HP - 1柱 ,氢火焰检测 ,相对误差在 5 %以内 ,该定量分析快速、简便、准确     

Enumerating maximal bicliques in bipartite graphs with favorable degree sequences

We propose an output-sensitive algorithm for the enumeration of all maximal bicliques in a bipartite graph, tailored to the case when the degree distribution in one partite set is very skewed. We accomplish a worst-case bound better than previously known general bounds if, e.g., the degree sequence follows a power law.     

3D fingerprint reconstruction system using feature correspondences and prior estimated finger model

The paper studies a 3D fingerprint reconstruction technique based on multi-view touchless fingerprint images. This technique offers a solution for 3D fingerprint image generation and application when only multi-view 2D images are available. However, the difficulties and stresses of 3D fingerprint reconstruction are the establishment of feature correspondences based on 2D touchless fingerprint images and the estimation of the finger shape model. In this paper, several popular used features, such as scale invariant feature transformation (SIFT) feature, ridge feature and minutiae, are employed for correspondences establishment. To extract these fingerprint features accurately, an improved fingerprint enhancement method has been proposed by polishing orientation and ridge frequency maps according to the characteristics of 2D touchless fingerprint images. Therefore, correspondences can be established by adopting hierarchical fingerprint matching approaches. Through an analysis of 440 3D point cloud finger data (220 fingers, 2 pictures each) collected by a 3D scanning technique, i.e., the structured light illumination (SLI) method, the finger shape model is estimated. It is found that the binary quadratic function is more suitable for the finger shape model than the other mixed model tested in this paper. In our experiments, the reconstruction accuracy is illustrated by constructing a cylinder. Furthermore, results obtained from different fingerprint feature correspondences are analyzed and compared to show which features are more suitable for 3D fingerprint images generation.     

60%硫·三环可湿性粉剂的液相色谱分析

本方法以150×3.9mm(i.d)NovapakC184μm不锈钢柱为色谱柱,二氯甲烷+甲醇+异丙醇+水为流动相,在检测波长为252nm下对60%硫·三环可湿性粉剂进行液相色谱分析。三环唑和硫磺的标准偏差分别为0.12%和0.15%;变异系数分别为0.39%和0.31%;线性相关系数分别为0.9999和0.9997;平均回收率分别为99.63%和99.26%。     

Monitoring the linear alkylbenzene sulfonation process using high-temperature gas chromatography

Controlling the linear alkylbenzene sulfonate (LAS) sulfonation process is a critical part of the LAS manufacturing process; this process can be monitored by assaying for LAS content, unsulfonated linear alkylbenzene (LAB), and LAB sulfones. Traditionally, assaying the LAB and LAB sulfone contents has been time consuming and not straightforward. A simple and rapid procedure is described for the isolation and simultaneous capillary gas chromatographic (GC) quantification of LAB and LAB sulfones in LAS. The procedure involves extraction of the unsulfonated LAB and the LAB sulfones into n-heptane; sodium linear alkylbenzenesulfonate or linear alkylbenzenesulfonic acid (reacted to form sodium linear alkylbenzenesulfonate) remains in the aqueous extraction solvent layer. High-temperature capillary GC using a specialty metal capillary column enables both LAB and high molecular weight LAB sulfones to be quantified.     

鱼尾型机头中熔体流动的三维流场分析

本文利用ANSYS和MATLAB软件，对鱼尾型片材机头中熔体的速度、压力、剪切应力和粘度的分布进行三维有限元模拟和分析。探知了熔体在流道内的运动规律及特点并分析其原因，对口模设计具有定的指导作用。     

N-甲基乙酰氧基乙酰苯胺的液谱分析

本文研究了高效液相色谱测定N－甲基乙酰氧基乙酰苯胺的方法。采用Hypersil C18柱，以甲醇：水＝60：40（V／V）为流动相。该方法的变异系数为0．43％，回收率为98．9％－100．6％。