院前急救物资管理方法的探讨

目的探讨院前急救物资管理的有效方法。方法根据本地区院前急救的疾病谱,按上级主管部门的规定,配备相应的急救物资,应用“五常法”的基本理论,采用个人负责、三级检查、持续改进的综合管理方法。结果通过以上管理方法,能及时发现问题,及时处理,有效地减少院前急救物资在使用方面存在的问题。结论实施综合管理方法,有利于提高院前急救的质量。     

A new method for the solution of hybrid analog digital beamforming problems

By going to millimeter wave (mmWave) we can use large scale MIMO due to short mmWave wavelength to overcome path loss by using beamforming to focus power of signal to the receiver. System structure of mmWave band is different with conventional MIMO because of large scale MIMO which is leading to use many RF-chains. For this reason Hybrid structure have been proposed for large Scale MIMO. By going to Hybrid structure a new issue has been created with phase shifter constraint. In this paper we propose a novel solution to make a hybrid precoding and combing to reach high spectral efficiency. Our problem includes a maximizing Frobenius norm of multiplying five complex matrices. As constraints, all elements of some matrices must have unit norm, and also the multiplication of some matrices must have a specific Frobenius norm. A novel solution is proposed for the problem, which is gained in two steps. At the first step, we propose a new decomposition usable for kind of complex matrices which could lead to reduce the dimension of the objective function, and eliminating constraints completely and in the second step, we propose an iterated algorithm for the resulting problem. By proposing another novel technique, we show that in each iteration, the optimal problem is equivalent to a quadratic optimal problem with limitations on the vector norm, and as a result, an optimal problem is obtained quickly. Moreover, some other real examples are included to demonstrate the usefulness and effectiveness of the proposed algorithm.     

HPLC测定坎地沙坦酯氨氯地平片有关物质及降解产物

目的 建立测定坎地沙坦酯氨氯地平片有关物质的高效液相色谱法。方法 采用Inertsil ODS-SP C18（150 mm× 4.6 mm,5 μm）色谱柱,以0.035 mol·L-1 KH2PO4（磷酸调pH 3.0）-甲醇-乙腈为流动相,梯度洗脱,检测波长238 nm,流速1.0 mL·min-1。结果 特异性杂质和破坏条件下产生的降解产物与主药分离较好,3批样品最大单个杂质为坎地沙坦酯杂质B,总杂质均〈0.5%。结论 本法专属性强,灵敏度高,重现性好,能够有效控制产品质量。     

中医医院开展临床中药学工作初探

分析我院（二级甲等中医医院）临床药学开展的现状,特别是临床中药学,讨论临床中药师的培养模式及发展策略,探索规范化药学查房的工作模式——随医查房和独自查房相结合,为提高药师的临床药学服务质量提供参考。     

强力吸引器和吸唾器在窝沟封闭中的应用效果观察

目的比较强力吸引器和吸唾器在窝沟封闭中的应用效果。方法将40例接受窝沟封闭的学生采用自身半口对照法,一侧应用强力吸引器,另一侧应用吸唾器,比较两组的操作时间、酸蚀次数、舒适度及窝沟封闭剂完整保留率。结果两组的操作时间、酸蚀次数、舒适度比较差异有统计学意义（P〈O．05）。强吸组的窝沟封闭剂完整保留率为97．50％,弱吸组的窝沟封闭剂完整保留率为92．50％,差异无统计学意义（P〉O．5）。结论在窝沟封闭操作过程中,应用强力吸引器配合吸唾,操作时间短,酸蚀次数少,舒适度好。     

Spatial Decomposition of a Broadband Pulse Caused by Strong Frequency Dispersion of Sound in Acoustic Metamaterial Superlattice

An acoustic metamaterial superlattice is used for the spatial and spectral deconvolution of a broadband acoustic pulse into narrowband signals with different central frequencies. The operating frequency range is located on the second transmission band of the superlattice. The decomposition of the broadband pulse was achieved by the frequency-dependent refraction angle in the superlattice. The refracted angle within the acoustic superlattice was larger at higher operating frequency and verified by numerical calculated and experimental mapped sound fields between the layers. The spatial dispersion and the spectral decomposition of a broadband pulse were studied using lateral position-dependent frequency spectra experimentally with and without the superlattice structure along the direction of the propagating acoustic wave. In the absence of the superlattice, the acoustic propagation was influenced by the usual divergence of the beam, and the frequency spectrum was unaffected. The decomposition of the broadband wave in the superlattice’s presence was measured by two-dimensional spatial mapping of the acoustic spectra along the superlattice’s in-plane direction to characterize the propagation of the beam through the crystal. About 80% of the frequency range of the second transmission band showed exceptional performance on decomposition.     

Experimental Study on Optimization of Phosphogypsum Suspension Decomposition Conditions under Double Catalysis

Phosphogypsum (PG) is not only a solid waste discharged from the phosphate fertilizer industry, but also a valuable resource. After high-temperature heat treatment, it can be decomposed into SO₂ and CaO; the former can be used to produce sulfuric acid, and the latter can be used as building materials. In this paper, the catalytic thermal decomposition conditions of phosphogypsum were optimized, and the effects of the reaction temperature, reaction atmosphere, reaction time and carbon powder content on the decomposition of phosphogypsum were studied. The research shows that the synergistic effect of carbon powder and CO reducing atmosphere can effectively reduce the decomposition temperature of phosphogypsum. According to the results of the orthogonal test under simulated suspended laboratory conditions, the factors affecting the decomposition rate of phosphogypsum are temperature, time, atmosphere and carbon powder content in turn, and the factors affecting the desulfurization rate are time, temperature, atmosphere and carbon powder content in turn. Under laboratory conditions, the highest decomposition rate and desulfurization rate of phosphogypsum are 97.73% and 97.2%, and the corresponding reaction conditions are as follows: calcination temperature is 1180 °C, calcination time is 15 min, carbon powder content is 4%, and CO concentration is 6%. The results of thermal analysis of phosphogypsum at different temperature rising rates show that the higher the temperature rising rate, the higher the initial temperature of decomposition reaction and the temperature of maximum thermal decomposition rate, but the increase in the temperature rising rate will not reduce the decomposition rate of phosphogypsum.     

Thermal Decomposition Behavior of Prussian Blue in Various Conditions

Prussian blue analogs (PBA) are widely studied for radioactive cesium decontamination. However, there are fewer works related to their post use storage. Considering the oxidative stabilization of the material after the selective uptake of Cs, the thermogravimetric properties in powder and bead form, with various Cs and other alkali metal ions adsorbed, and various heating rates were studied. TG-DTA taken in dry air condition shows an exothermic decomposition at ~270 °C. This temperature varied with the heating rate, mass, and the proportion of adsorbed ions. The best condition for complete oxidation of Prussian blue (PB) is found to be a gradual oxidative decomposition by heating in the temperature range of 200–220 °C until the total mass is decreased by >35%. After this, the temperature could be safely increased to >300 °C for the complete oxidative decomposition of PB that formed iron oxide and salt of the adsorbed Cs. A pilot scale test conducted using the radioactive Cs adsorbed Prussian blue microbeads (PB-b) confirmed that no Cs was released in the effluent air during the process.