硫化氢制酸的生产技术进展

根据近年的文献报道，评述了硫化氢制酸的生产技术近况。内容包括硫化氢制成硫磺然后再生产硫酸，以及以硫化氢为原料直接制得硫酸。主要从工艺过程、二氧化硫回收率及产品硫酸的浓度等方面加以归纳和概述。通过比较分析得出，湿气制酸（WAX）工艺无论从工艺生产流程，还是二氧化硫转化率、能耗、操作费用和余热回收率等方面都有其独到之处，值得借鉴和引进推广。     

氮掺杂纳米TiO_2改性涂料及其抗菌性能

将自制的氮掺杂锐钛矿型纳米二氧化钛光催化剂作为功能性组分,加入耐光催化氧化的硅丙乳胶涂料中,制备出一种新型光催化功能性建筑涂料,实现了可见光光催化效应。使用紫外-可见光吸收光谱研究该功能性涂料对紫外线的吸收能力;采用菌落计数法研究该涂料在可见光照射下对金黄色葡萄球菌的杀灭性能。同时分析了纳米粉体种类、引入量及方式对涂料紫外线的吸收性能和抗菌性能的影响。     

Improvement of Microwave Loss Tangent and Tunability of Ba0.55Sr0.45TiO3/MgO Composites Using the Heterogeneous Precipitation Method

Ba_0.55Sr_0.45TiO₃/MgO composites were successfully prepared by the heterogeneous precipitation method and their structural, surface morphological, tunable properties, and dielectric properties at microwave frequency were systemically investigated. Compared with the sample prepared by the traditional solid-state method, the sample prepared by the heterogeneous precipitation method exhibits a smaller grain size, more uniform microstructure, higher tunability, and lower microwave loss, and these properties are very beneficial to the development of the microwave tunable devices application. Moreover, the effects of La₂O₃ doping on the dielectric and tunable properties of BST/MgO composites are investigated. The result shows that the La³⁺-doped sample has higher tunability and lower microwave loss than the undoped one.     

Tri-pyramid Robot: Design and kinematic analysis of a 3-DOF translational parallel manipulator

3-DOF translational parallel manipulators have been developed in many different forms, but they still have respective disadvantages in different applications. To overcome their disadvantages, the structure and constraint design of a 3-DOF translational parallel manipulator is presented and named the Tri-pyramid Robot. In the constraint design of the presented manipulator, a conical displacement subset is defined based on displacement group theory. A triangular pyramidal constraint is presented and applied in the constraint designs between the manipulator?s subchains. The structural properties including the decoupled motions, overconstraint elimination, singularity free workspace, fixed actuators and isotropic configuration are analyzed and compared to existing structures. The Tri-pyramid Robot is constrained and realized by a minimal number of 1-DOF joints. The kinematic position solutions, workspace with variation of structural parameters, Jacobian matrix, isotropic and dexterity analysis are performed and evaluated in the numerical simulations.     

氢氧化铝微粉生产过程中晶种分解的研究

晶种分解是种分法生产氢氧化铝微粉的工序，介绍了控制铝酸钠精制液的分解温度、分解时间、搅拌强度等条件并添加特制的高活性晶种做晶种生产优质氢氧化铝微粉的生产过程，并通过对几个月的生产跟踪分析研究，得出氢氧化铝微粉的晶种分解主要与晶种的质量和数量、分解温度、分解时间及搅拌强度等因素有关，这对于进一步完善氢氧化铝微粉的生产工艺起到很大的作用。     

MA-AA聚合物陶瓷助磨剂的助磨机理研究

通过测定MA-AA对陶瓷瘠性原料(石英)以及含粘土的陶瓷塑性原料的助磨作用,以及MA-AA对陶瓷塑性原料泥浆 的粘度和ζ-电位的影响规律,并结合试样的红外光谱分析结果,研究了MA-AA对陶瓷原料的助磨机理。结果表明: MA-AA对陶瓷原料的助磨作用是由于其同时具有降低颗粒表面硬度和调节泥浆流变性两种作用。     

常见塑料溶解性能研究及其混合物的选择性分离

以常见塑料为原料,以有机物为溶剂,研究了塑料在有机溶剂中的溶解性能,提出了选择性分离混合塑料的方案。结果表明,实验所选用的塑料在有机溶剂中的溶解性能和溶解条件不同;可利用塑料与有机溶剂的相容性差别分离混合塑料。     

热态下鼓泡浆液反应器的气含率研究

本文在热态条件下，研究了鼓泡浆液反应器的气含率、反应器直径为0.098m，物系组成为氮气－液体石腊－石英砂。考察了气速、压力、温度、静床高及固体引入等因素对气含率的影响。对于53μm粒子的三相浆态体系，气含率与表观气速关系式为εG=0.053uG^1.2。     

Automatic inpainting by removing fence-like structures in RGBD images

Recent inpainting techniques usually require human interactions which are labor intensive and dependent on the user experiences. In this paper, we introduce an automatic inpainting technique to remove undesired fence-like structures from images. Specifically, the proposed technique works on the RGBD images which have recently become cheaper and easier to obtain using the Microsoft Kinect. The basic idea is to segment and remove the undesired fence-like structures by using both depth and color information, and then adapt an existing inpainting algorithm to fill the holes resulting from the structure removal. We found that it is difficult to achieve a satisfactory segmentation of such structures by only using the depth channel. In this paper, we use the depth information to help identify a set of foreground and background strokes, with which we apply a graph-cut algorithm on the color channels to obtain a more accurate segmentation for inpainting. We demonstrate the effectiveness of the proposed technique by experiments on a set of Kinect images.     

鹽酸氟桂利嗪有关物质测定方法的研究

在Balestrion·F.,Jirillo·R. 等人的研究及卫生部部颁标准在基础上,对盐酸氟桂利嗪的有关物质的测定方法进行了研究,由薄层色谱法改为高效液相色谱法,操作简单易行,分辨率高,重现性好,结果准确可靠。