降耗增效的自动化反冲洗方法

为了提高南二一深度污水站反冲洗效率,改善水质,我站探索实施了自动化反冲洗操作方法。该方法使污水水质指标得到改善的同时,实现了节能降耗、挖潜增效的目标。     

反冲洗过滤的应用新领域——RWF反冲洗过滤器开创了新的应用领域

RWF反冲洗过滤器具有极佳的反冲洗效果，它不仅提高了用户的经济效益（节约了流体介质的输送费用，节省了流程泵的能源消耗），而且也开创了反冲洗过滤技术全新的应用领域，可以替代费时费力而且费用昂贵的流程工艺技术，例如竖流式沉淀絮凝、沉积式过滤和横流过滤等。     

普通快滤池改造反冲洗均匀性问题的探讨

本文从理论及工程实践角度探讨普通快滤池改造中影响滤池反冲配水均匀性的一些因素。文章中指出具有中间配水渠结构的普通快滤池,做小阻力改造后中间配水渠不同位置由于存在压力差而对滤池反冲洗配水均匀性造成的影响,以及如何避免和减小中间配水渠的配水不均均性。     

一种在线测量平面度误差的新方法

介绍了一种测量平面度误差的二维最小二乘逐次两点设基分离法，设计了一套自动测量实验系统，并且编制了一套满足最小条件的平面度误差数据处理程序。     

一种在线识别转子不平衡量的新方法

本文采用电磁激励的方法，在线识别转子支承的刚度和阻尼系数，然后根据Ritz法和模态理论的基本思想，提出了一种新的转子不平衡的识别方法，该方法无需改变转子的工作转速，且能在支承随转速变化的条件下，满足全速动平衡的要求，该方法适用于测点数和校正平面数都大于等于3的转子，文中给出了仿真研究结果证明了该方法的有效性。     

计算非周期信号频谱的一种新方法

本文介绍了基于离散哈脱莱变换与离散付里叶变换关系，计算非周期信号的频谱的方法。该方法比利用离散付里叶变换大多数算法能减少运算量，提高运算速度。     

高压反冲洗过滤站滤网的应用研究

高压反冲洗过滤站是矿井顺槽设备必不可少的一环,应用范围十分广泛,其中关键部分便是滤网,滤网的性能直接决定了反冲洗过滤站的性能,本文对高压反冲洗过滤站滤网的应用进行了研究,对相关产品的设计有一定的指导意义。     

一种大型锻件外形尺寸在线测量新方法

提出了一种大型锻件外形尺寸的在线测量新方法.首先通过激光扫描仪扫描锻件表面的信息,将获得的扫描仪到锻件表面的距离信息转化为坐标信息,然后进行点云拼接、数据精简和曲面重构处理,最后导入SolidWorks软件中构建锻件的三维模型,从中提取截面,给出锻件的尺寸信息,实现大型锻件外形尺寸的在线测量.     

一种线缆计米器在线校准的新方法

本文介绍了一种能准确、快捷地对线缆生产企业使用的计来器进行在线校准的新方法     

关于如何确定螺杆泵热洗周期的讨论

螺杆泵井已成为油田生产主要举升方法之一，其应用规模在逐步地扩大，为更好的提高螺杆泵井地管理水平，本文结合了生产中的实际情况，以分析螺杆泵井的工作电流、螺杆泵井的消耗功率及其输出扭矩为着手点，探索这几点因素与螺杆泵井结蜡地量化关系，从而分析应运用何种方法才能科学合理地确定其热洗周期。     

果胶超滤纯化过程传质模型和动力学分析

研究了果胶提取液超滤膜分离处理过程传质特征,建立了渗透通量、膜面浓度与压差的传质模型,并对膜阻力和浓差极化阻力进行了定量描述;同时对超滤过程的动力学进行了分析.     

超滤在天然甘露醇精制中的应用

在天然甘露醇的生产中 ,应用中空纤维超滤技术改进传统的精制工艺 ,去除糖胶、颗粒等杂质 .纯化后的产品可改善大输液的生产工艺 ,满足出口产品的要求 .近两年的实际应用表明 ,该新技术的开发和应用是成功的 .     

应用超滤技术改进Vc生产工艺

用超滤技术纯化Ｖｃ发酵液已在东北制药总厂（简称东药）年产万吨Ｖｃ生产线上应用,采用膜技术替代原工艺中的一次树脂交换和加热工序,具有速度快、节约能源、收率高等优点。自控清洗程序和国产洗膜剂的应用保证了超滤膜有较长的使用寿命。     

中空纤维超滤膜在华药制备无菌除热原水中的应用

介绍了华药利用中空纤维超滤膜制备无菌除热原水的两个应用事例及水质检测结果，此工艺可在医药行业进行推广     

压力式中空超滤膜组件集成与运行分析

以中空纤维超滤膜为出发点,深入分析超滤膜材料的微观和宏观性能、集成膜组件的影响因素。详细阐述了超滤组件的操作和运行方式,并简单介绍了超滤组件膜污染形成机理及清洗的方法,以翔实的数据全面展示了超滤膜集成组件及其工业化应用情况。     

Investigating the effect of online and offline reputation on the provision of online counseling services: A case study of the Internet hospitals in China

The sustainable development of Internet hospitals and e-health platforms relies on the participation of patients and physicians, especially on the provision of health counseling services by physicians. The objective of our study is to explore the factors motivating Chinese physicians to provide online health counseling services from the perspectives of their online and offline reputation. We collect the data of 141029 physicians from 6173 offline hospitals located in 350 cities in China. Based on the reputation theory and previous studies, we incorporate patients’ feedback as physicians’ online reputation and incorporate physicians’ offline professional status as physicians’ offline reputation. Results show that physicians’ online reputation significantly and positively influence their online counseling behaviors, whereas physicians’ offline reputation significantly and negatively influence their online counseling behaviors. We conclude that physician’s online and offline reputations show a competitive and substitute relationship rather than a complementary relationship in influencing physicians to provide online counseling services in Internet hospitals. One possible explanation for the substitute relationship could be the constraints of limited time and effort of physicians.     

A clustering approach to identify the time of a step change in Shewhart control charts

Control charts are the most popular statistical process control tools used to monitor process changes. When a control chart indicates an out‐of‐control signal it means that the process has changed. However, control chart signals do not indicate the real time of process changes, which is essential for identifying and removing assignable causes and ultimately improving the process. Identifying the real time of the change is known as the change‐point estimation problem. Most of the traditional methods of estimating the process change point are developed based on the assumption that the process follows a normal distribution with known parameters, which is seldom true. In this paper, we propose clustering techniques to estimate Shewhart control chart change points. The proposed approach does not depend on the true values of the parameters and even the distribution of the process variables. Accordingly, it is applicable to both phase‐I and phase‐II of normal and non‐normal processes. At the end, we discuss the performance of the proposed method in comparison with the traditional procedures through extensive simulation studies. Copyright © 2008 John Wiley & Sons, Ltd.     

Determination of the pressurising period for stored cryogenic fluids

It is a normal operating condition for a lot of cryogenic storage vessels that no boil-off gas is vented over long periods, which leads to a simultaneous pressure increase of the stored fluid. One main reason therefore is to avoid product losses during transport or between withdrawals. At transport conditions the mixing of the fluid can be assumed to be ideally, which results in a maximum reachable pressurising period. At stationary conditions the pressurising period is expected to be shorter, because a stratification is rising up, so that the heat capacity of the stored fluid cannot be used completely.In a thermodynamic view, an isochore change of state takes place and the heat flux into the vessel rises the internal energy of the fluid. For the representation of the isochore change of state a new developed Δu/v-v-diagram with the 1 × 10⁵ Pa reference as a basis line is introduced. The basis line is linear for the filling rate and functionally connected with the specific volume.For the fluids He and H₂ e.g., Δu/v-v-diagrams are pointed out, using the u- and v-values on the saturation lines for the two phase region and those of some isobar lines for the region above the critical pressure.     

超滤分离蛋白质过程快速优化新技术及其应用

介绍了蛋白质超滤分离快速优化新技术、新方法,包括脉冲进样技术,载体相超滤技术、参数连续变化超滤技术以及在这些技术基础上建立的超滤分离快速优化新方法,克服了常规蛋白质超滤分离过程优化中存在的实验工作量大、蛋白质消耗多、费时以及费用高等缺点.利用该方法对以溶菌酶和卵清蛋白为模型蛋白质的混合体系进行了研究,筛选出合适的超滤膜...