急性冠脉综合征瘀毒互结证诊断标准研究

目的 基于冠心病“瘀毒”病因病机的理论认识,建立急性冠脉综合征瘀毒互结证诊断标准。方法 采用文献系统分析与横断面临床研究构建条目池,采用德尔菲法专家咨询对条目进行筛选,采用层次分析法确定各条目权重。在此基础上,结合条目权重及临床实用性原则建立诊断标准。结果 文献系统分析筛选条目43个,横断面临床研究纳入患者400例,筛选条目39个,归纳分类后形成包含67个条目的条目池;经过两轮德尔菲专家咨询,筛选保留条目28个;通过层次分析法,确定高权重类条目（0.0430~0.1976）9个、中权重类条目（0.0153~0.0289）9个与低权重类条目（0.0060~0.0147）10个。结合临床实用性原则,优化形成包括必要指标（心绞痛程度进行性加重、近1个月反复发作性心绞痛等）、理化指标（心脏肌钙蛋白或肌酸激酶同工酶升高等）及舌象脉象（舌青紫或紫暗等、脉弦细或脉涩）3个维度的急性冠脉综合征瘀毒互结证诊断标准。两轮专家问卷咨询肯德尔和谐系数分别为0.368、0.395,格朗巴赫系数为分别为0.967、0.893,提示专家意见一致性好,结果可信度高。结论 该诊断标准涵盖了反映瘀毒互结致病特点的宏观表征和理化指标,可指导急性冠脉综合征瘀毒互结证的诊断。     

颌面部内固定钛板拆除原因分析

目的探讨颌面部拆除坚固内固定术后钛板的原因和适应证。方法收集永康市第一人民医院口腔科2001—2005年内行颌面部坚固内固定术后87例取钛板患者,就其原因进行分析。结果本组病例取钛板原因中患者要求31例、感染12例、钛板外露13例、影响发育12例、颞下颌关节功能障碍9例、影响修复8例、其他2例。结论颌面部钛板内固定术后取板原因和适应证包括心理因素、局部因素、功能障碍因素、其他因素。     

新增基本公共卫生服务项目遴选及补助标准研究

目的：为满足我国不同地区人群对基本公共卫生服务日益增长的需要,应结合不同地区人口特征、疾病负担、经济发展水平等因素对基本公共卫生项目服务内容进行调整。方法：以多准则决策分析理论为依据,基于文献研究构建各省新增基本公共卫生服务项目的遴选评估框架,并进行公共卫生干预项目遴选评估案例模拟,探索形成可操作的省级新增基本公共卫生服务项目遴选流程及补助标准规范。结果：初步构建了包含3个维度、8个指标的遴选框架,形成了省级基本公共卫生服务项目遴选调整的流程步骤。结论：为各省新增地方基本公共卫生服务项目与补助标准提供了循证决策依据。     

Systematic Study of Effective Hydrothermal Synthesis to Fabricate Nb-Incorporated TiO2 for Oxygen Reduction Reaction

Fuel cells are expected to serve as next-generation energy conversion devices owing to their high energy density, high power, and long life performance. The oxygen reduction reaction (ORR) is important for determining the performance of fuel cells; therefore, using catalysts to promote the ORR is essential for realizing the practical applications of fuel cells. Herein, we propose Nb-incorporated TiO₂ as a suitable alternative to conventional Pt-based catalysts, because Nb doping has been reported to improve the conductivity and electron transfer number of TiO₂. In addition, Nb-incorporated TiO₂ can induce the electrocatalytic activity for the ORR. In this paper, we report the synthesis method for Nb-incorporated TiO₂ through a hydrothermal process with and without additional load pressures. The electrocatalytic activity of the synthesized samples for the ORR was also demonstrated. In this process, the samples obtained under various load pressures exceeding the saturated vapor pressure featured a high content of Nb and crystalline TiNb₂O₇, resulting in an ellipsoidal morphology. X-ray diffraction results also revealed that, on increasing the Nb doping amounts, the diffraction peak of the anatase TiO₂ shifted to a lower angle and the full width at half maximum decreased. This implies that the Ti atom is exchanged with the Nb atom during this process, resulting in a decrease in TiO₂ crystallinity. At a doping level of 10%, Nb-incorporated TiO₂ exhibited the best electrocatalytic activity in terms of the oxygen reduction current (i_ORR) and onset potential for the ORR (E_ORR); this suggests that 10% Nb-doped samples have the potential for enhancing electrocatalytic activity.     

Response Surface Methodology and Artificial Neural Network Modelling of Membrane Rotating Biological Contactors for Wastewater Treatment

Membrane fouling is a major hindrance to widespread wastewater treatment applications. This study optimizes operating parameters in membrane rotating biological contactors (MRBC) for maximized membrane fouling through Response Surface Methodology (RSM) and an Artificial Neural Network (ANN). MRBC is an integrated system, embracing membrane filtration and conventional rotating biological contactor in one individual bioreactor. The filtration performance was optimized by exploiting the three parameters of disk rotational speed, membrane-to-disk gap, and organic loading rate. The results showed that both the RSM and ANN models were in good agreement with the experimental data and the modelled equation. The overall R² value was 0.9982 for the proposed network using ANN, higher than the RSM value (0.9762). The RSM model demonstrated the optimum operating parameter values of a 44 rpm disk rotational speed, a 1.07 membrane-to-disk gap, and a 10.2 g COD/m² d organic loading rate. The optimization of process parameters can eliminate unnecessary steps and automate steps in the process to save time, reduce errors and avoid duplicate work. This work demonstrates the effective use of statistical modeling to enhance MRBC system performance to obtain a sustainable and energy-efficient treatment process to prevent human health and the environment.     

Designing of the Electromechanical Drive for Automated Hot Plate Welder Using Load Optimization with Genetic Algorithm

Drive and conveyor belts are widely used in the mining and processing industry. One of the types often used is the belt with a cross-section and a diameter of several millimeters, made of weldable thermoplastic elastomer. Their production process requires the joining of the ends to obtain a closed loop. This operation is often performed by butt welding using the hot plate method. Taking into account the industrial requirements, the authors made an effort to design the automated welding machine for this type of belt. The work that had been conducted was finished with the implementation of the device for serial belt production. One of the stages of the design process of the welding machine consisted of developing a solution for the electromechanical drive system. The paper presents a design and the selection of the key components of the drive system, in particular, the electrical executive elements. Firstly, on the basis of the functional requirements of individual working mechanisms, the kinematic structure of the drives was developed, and the influence of the workload on power consumption was described. Then, using known technological parameters, experimental research of the plasticization operation was performed. On the basis of the results obtained, a mathematical model of the correlation between the plasticization force and technological parameters was derived. Using the derived model, the optimization of the technological parameters was made by using a genetic algorithm. The work led to the choice of an effective electric motor, which is the main component of the designed drive system.     

响应面法优化替考拉宁发酵培养基及其扩大培养

目的 通过响应面法,优化替考拉宁发酵培养基,并对发酵工艺参数进行优化,来提高其发酵产量。方法 以游动放线菌TC19-3p-103为试验菌株,采用单因素试验确定发酵培养基考察因素的参考范围;利用最陡爬坡试验确定响应面试验的中心区域;利用Box-Behnken响应面法,确定了发酵培养基中的有机氮源最佳浓度组合;并对起始搅拌转速与通气量这两个发酵工艺参数进行单因素考察;在发酵过程中,采用流加技术控制碳源浓度。结果 经优化的发酵培养基,其摇瓶产量提高了31.6%;50L罐发酵工艺参数优化后,发酵水平达到8558 mg/L。结论 优化后的发酵工艺,显著提高了替考拉宁的产量,为其工业化生产奠定了基础。     

全过程质量控制在Ⅰ期临床试验管理中的应用

目的:探讨全过程质量控制在Ⅰ期临床试验管理中的应用效果.方选:选择实施全过程质量控制前(2018年1月-2019年1月)和实施后(2019年6月-2020年6月)的96例受试者和40名研究护士作为研究对象,分别作为对照组和研究组,实施传统的回顾式方法及全过程质量控制质量管理流程,采用量表分析法比较两组受试者依从性、脱落...     

钛板坚强内固定治疗下颌骨骨折136例报告

目的：总结钛板坚强内固定术治疗下颌骨骨折的临床疗效。方法：收集1998～2004年136例下颌骨骨折病例,行钛板坚强内固定术治疗,分别在手术后1个月、3个月、6个月复查,拍摄X线片,观察骨折线对位愈合情况、咬合关系及开口度等功能恢复情况。结果：136例中134例一期愈合,2例延期愈合。X线片示骨折线对位良好,咬合关系及开口度均恢复良好。结论：钛板坚强内固定术治疗下颌骨骨折效果好,方法可靠,操作简单。     

生物等效性试验健康受试者筛选流程的优化

目的 探讨如何提高生物等效性试验健康受试者筛选期的工作效率.方法 试验甲给予受试者根据各个检查项目等待人数自由分流的筛选方法;试验乙给予对部分检查项目进行先后顺序限定,并要求研究者在发现受试者某项检查结果异常后,应及时终止其继续参加其他检查的筛选方法.比较2个试验中受试者在某项检查不合格时合并有其他项目检查的情况.结果...