转变职能 开阔思路 强化调控工作为农民办实事——国务委员陈俊生在全国农业工作会议上的讲话(摘要)

本刊特约记者报道,国务委员陈俊生在会议结束时到会作了重要讲话。陈俊生同志首先回顾1993年农业和农村经济工作。 陈俊生同志在谈到1994年的工作时说。

大型泵机组状态监测及工况调控系统的研制

采用现代分布式测控系统对泵站的5台机组进行监控,现场智能仪器与计算机之间采用二线制网络传输数据,实时在线采集并同时显示5台机组工况参数、公用参数及重要计算参数如泵效等约140个。计算机可按流量、压力、电流和泵效等点动控制泵的工况。系统设置成自动控制状态时,可使泵始终工作在高效范围,以提高机组的运行效益。

660MW超临界机组深度调峰工况协调控制优化方法

当前的超临界机组深度调峰工况控制优化模型多为单结构,控制覆盖范围较小,导致电负荷优化差值增加,为此提出对660MW超临界机组深度调峰工况协调控制优化方法的设计与验证分析。根据当前的工况控制优化需求及标准,首先制定约束条件,同时计算出优化目标函数,采用多阶的方式,扩大控制覆盖范围,构建多阶机组调峰工况协调优化模型。采用自适应运行实现工况协调优化处理。测试结果表明,设计方法的电负荷优化差值始终在100kW·h以下,电负荷优化差值水平较低,660MW超临界机组深度调峰效果好,具有较高的实际应用价值。

台州市人民政府办公室关于公布2011年度我市新建商品住房价格控制目标和加强新建商品住房价格控制工作的通知

台政办发[2011]28号各县(市、区)人民政府,市政府直属各单位:为贯彻落实《国务院办公厅关于进一步做好房地产市场调控工作有关问题的通知》(国办发[2011]1号)

视频AI算法分析的煤矿固体智能充填开采方法

固体充填开采方法在处理煤基固废和控制地表沉降方面具有较大优势,但其充填效率低、接续时间长、劳动强度大等问题制约着绿色充填开采的发展。针对固体充填技术升级的内生动力、行业发展的迫切需求以及矿山智能化建设的必然趋势,提出视频AI算法分析的固体智能充填方法。本文首先通过分析该固体智能充填方法的内涵及难点,构建出视频AI算法分析的固体智能充填开采方法系统构架,阐述视频AI算法的工作原理与实现流程,并给出视频AI算法可以实现的功能。根据不同地质条件分析了关键充填装备在不同工序下的影响因素,通过Creo进行液压支架骨架建模,实现液压支架在不同工况下机构的运动,给出对应的调控判据及路径,并设计关键充填装备在不同工序下的控制算法流程。根据视频算法特征及算法优缺点初步选择了图像识别算法,将构建好的目标数据集经过算法模型的训练及调参最终确定了最佳算法及对应的参数。通过某矿充填面应用效果分析,SVM各评价指标均优于其他算法,表明SVM模型在工况判别时表现出色,具有高度的准确性及可靠性。本研究可实现关键充填装备机构非正常工况的识别及调控、提高充填效率、机构位姿参数识别、充填空间夯实效果展示,可为视频AI算法分析的固体智能充填开采技术研发与应用提供理论指导。

The pH control optimization in the crop fertigation system using ANN

pH regulation is a complicated and comprehensive technique in the crop fertigation system. In this paper, a method is put forward to improve the quality of pH regulation, using artificial neural network to map a nonlinear relationship between pH interfering factor and the switching frequency of pH control valve, which achieves the dynamic feedforward compensation to the main control system.

Industrial wastes applications for alkalinity regulation in bauxite residue: A comprehensive review

Bauxite residue is a highly alkaline material generated from the production of alumina in which bauxite is dissolved in caustic soda.Approximately 4.4 billion tons of bauxite residues are either stockpiled or landfilled,creating environmental risks either from the generation of dust or migration of filtrates.High alkalinity is the critical factor restricting complete utilization of bauxite residues,whilst the application of alkaline regulation agents is costly and difficult to apply widely.For now,current industrial wastes,such as waste acid,ammonia nitrogen wastewater,waste gypsum and biomass,have become major problems restricting the development of the social economy.Regulation of bauxite residues alkalinity by industrial waste was proposed to achieve‘waste control by waste’with good economic and ecological benefits.This review will focus on the origin and transformation of alkalinity in bauxite residues using typical industrial waste.It will propose key research directions with an emphasis on alkaline regulation by industrial waste,whilst also providing a scientific reference point for their potential use as amendments to enhance soil formation and establish vegetation on bauxite residue disposal areas(BRDAs)following large-scale disposal.

Self-supporting NiFe LDH-MoS_(x) integrated electrode for highly efficient water splitting at the industrial electrolysis conditions

Developing effective and practical electrocatalyst under industrial electrolysis conditions is critical for renewable hydrogen production.Herein,we report the self-supporting NiFe LDH-MoS_(x) integrated electrode for water oxidation under normal alkaline test condition(1 M KOH at 25℃)and simulated industrial electrolysis conditions(5 M KOH at 65℃).Such optimized electrode exhibits excellent oxygen evolution reaction(OER)performance with overpotential of 195 and 290 mV at current density of 100 and 400 mA·cm^(-2) under normal alkaline test condition.Notably,only over-potential of 156 and 201 mV were required to achieve the current density of 100 and 400mA·cm^(-2) under simulated industrial electrolysis conditions.No significant degradations were observed after long-term durability tests for both conditions.When using in two-electrode system,the operational voltages of 1.44 and 1.72 V were required to achieve a current density of 10 and 100 mA·cm^(-2) for the overall water splitting test(NiFe LDH-MoS_(x)/INF||20%Pt/C).Additionally,the operational voltage of employing NiFe LDH-MoS_(x)/INF as both cathode and anode merely require 1.52 V at 50mA·cm^(-2) at simulated industrial electrolysis conditions.Notably,a membrane electrode assembly(MEA)for anion exchange membrane water electrolysis(AEMWEs)using NiFe LDH-MoS_(x)/INF as an anode catalyst exhibited an energy conversion efficiency of 71.8%at current density of 400 mA·cm^(-2)in 1 M KOH at 60℃.Further experimental results reveal that sulfurized substrate not only improved the conductivity of NiFe LDH,but also regulated its electronic configurations and atomic composition,leading to the excellent activity.The easy-obtained and cost-effective integrated electrodes are expected to meet the large-scale application of industrial water electrolysis.

Genetic algorithm tuned PI controller on PMSM simplified vector control

A simple control structure in servo system is occasionally needed for simple industrial application which precise and high control performance is not exessively important so that the cost production can be reduced efficiently. Simplified vector control, which has simple control structure, is utilized as the permanent magnet synchronous motor control algorithm and genetic algorithm is used to tune three PI controllers used in simplified vector control. The control performance is obtained from simulation and investigated to verify the feasibility of the algorithm to be applied in the real application. Simulation results show that the speed and torque responses of the system in both continuous time and discrete time can achieve good performances. Furthermore, simplified vector control combined with genetic algorithm has a similar perfofmance with conventional field oriented control algorithm and possible to be realized into the real simple application in the future.

江苏电力负荷管理的创新及实践

江苏省电力公司积极开展电力负荷管理工作的创新及实践,在有序用电非工负荷调峰、电力需求响应以及负荷紧急群控方面进行了有益的探索,形成了较为完整的电力负荷管理体系,并且以非工负荷(公共楼宇空调负荷)调控为例,给出了空调负荷群控效果、单体用户刚性控制及柔性控制效果,为电力需求侧管理的持续创新探索了新的方向。

Electronic structure regulation on layered double hydroxides for oxygen evolution reaction

Oxygen evolution reactions(OERs)as core components of energy conversion and storage technology systems,such as water splitting and rechargeable metal–air batteries,have attracted considerable attention in recent years.Transition metal compounds,particularly layered double hydroxides(LDHs),are considered as the most promising electrocatalysts owing to their unique two-dimensional layer structures and tunable components.However,heir poor intrinsic electrical conductivities and the limited number of active sites hinder their performances.The regulation of the electronic structure is an effective approach to improve the OER activity of LDHs,including cationic and anionic regulation,defect engineering,regulation of intercalated anions,and surface modifications.In this review,we summarize recent advances in the regulation of the electronic structures of LDHs used as electrocatalysts in OERs.In addition,we discuss the effects of each regulation type on OER activities.This review is expected to shed light on the development and design of effective OER electrocatalysts by summarizing various electronic structure regulation pathways and the effects on their catalytic performances.

2500t/d生产线预分解系统节能降耗改造

广德新杭南方水泥一期改造分解炉改造,合理配置分解炉锥部风煤料配置,采取系统降阻措施二期技改鹅颈管改造,优化旋风筒进口形状,降耗效果显著。

The flood control and regulation of Three Gorges Project

The important role of Three Gorges Project (TGP) in the flood management of the Yangtze River Basin is summarized.The Optimal Regulation Schemes of the Three Gorge Reservoir is briefly described.The flood regulation effect of TGP is analyzed.Typical issues related to reservoir operation for flood regulation are discussed and suggestions are put forward for the future work.

Research and analysis about embedded operating computer system

Embedded operating system EOS （Embedded Operating System） is widely used system software which in the past is mainly used in fields of industrial control and defense system. EOS is responsible for the entire software and hardware resource allocation, scheduling work and coordinating concurrent control activities; some more successful applied EOS products have been presently launched. With the development of lnternet technology, information appliances and the universal application of miniaturization and specialization of EOS, EOS started from a single weak situation to a higher professional direction with strong functions.

Employer Branding Management As A Strategic and Organizational Control Tool

The issue of employer branding has always had an intrinsic interdisciplinary content, since it builds a bridge for cross-fertilization between different disciplines （strategic marketing, strategic management, and human resources management）. This paper presents employer branding as an approach based on effective strategic organizational resources and a precise employer branding management process. In this paper, the target is to define a possible frame in order to interpret employer branding techniques as control and regulation mechanisms. Control in organizations has long been a topic of interest for researchers and practitioners, alike who generally recognize that control mechanisms are needed to ensure that organizations may achieve their goals. It has been carried out a field work on the Italian Aeronautical Meta district, that generates annual revenues equal to EUR 8.7 billion and employees 36,300 people, of whom approximately 10% are employed in the space sector. Through this field work, the intention aim is to understand if and how employer branding may create, enforce, and set up internal and shared meaning and values. In particular, stemming from the empirical research＇s evidences, this paper tries to conceptualize employer branding as a factor to persuade and influence the way that organizational actors enact in a socially constructed context. In this effort, the aim is to understand how managers may affect meanings, values goals, and opinions through an effective action on employer branding that can play a crucial role in affecting sense-making processes, meanings, interpretations of the symbolic environment. The paper therefore opens up to new horizons, since it embraces a new application for employer branding, considering it as a modern control system and proposing an innovative approach in managerial control, founded on organizational identity as a key concept in an organizational citizenship＇s perspective

Effect of the computer fuzzy control on coal seam injection

To enhance the technology and efficiency of strata injection is a problem to be solved urgently. Because of effected by the rough and poor production conditions of mining and the changeable bearing condition of strata, the technological process of injection can not be controlled automatically.The fuzzy controlling technology of the coal strata injection is applied. This is the good way to ensure the effectiveness and efficiency of coal strata injection and to solve the current problems of production and safety in mining industry.

New parameter tuning method of washout filter-aided controller for dynamic behavior adjustment

Stabilizing unstable operating points is an effective way to enhance process benefits and safety, which motivates the development for a variety of advanced control strategies. The washout filter-aided controller(WFC), originally used for electric power system and aircraft, has been introduced to adjust the dynamic behavior of chemical process. However, the parameter tuning method faces two major limitations: the dimension of operating variables must be equal to or greater than that of state variables and only one positive real eigenvalue exists in the open loop system. To overcome the two limitations, this paper proposes a new parameter tuning method, so that the WFC is applicable in most chemical processes. By solving a constrained optimization problem, the controller parameters are determined under the constraint that the reassignment of the eigenvalues of the unstable desired operating point can satisfy the stability condition. Thus parts of the equilibrium manifold including the desired operating point are stabilized without affecting the shape of the equilibrium manifold. Finally, the effectiveness of the WFC improved by the proposed parameter tuning method is illustrated through a case study for propanediol anaerobic fermentation.

Human Resource Controlling and Human Resource Management： Practice of Small and Medium-Sized Building Companies in the Czech Republic

The aim of this paper is to define the nature, present the possibilities, and discuss the problems of using human resource controlling in small and medium-sized building companies. This paper is based on the assumption that expedient human resource controlling is an effective human resource management tool that achieves the required performance of employees and expected competitiveness of a building company. This paper uses the results of a questionnaire survey conducted in November 2013 to analyze human resource management in building companies in the Czech Republic and specify the organization and conditions of human resource management. Some 81 small （less than 50 employees） and 66 medium-sized （50-249 employees） building companies operating in the Czech Republic took part in the questionnaire survey. The results of the questionnaire survey showed the lack of concept and random nature of human resource management in most small and medium-sized building companies. Of course, in terms of the present economic trend, it is above all important for small and medium-sized companies to develop their adaptability to the building market and to be able to deal with a variety of construction works. It is effective human resource management supported by expedient human resources that serves this purpose.

Regulation of heme biosynthesis and transport in metazoa

Heine is an iron-containing tetrapyrrole that plays a critical role in regulating a variety of biological processes including oxy- gen and electron transport, gas sensing, signal transduction, biological clock, and microRNA processing. Most metazoan cells synthesize heine via a conserved pathway comprised of eight enzyme-cataiyzed reactions. Heme can also be acquired from food or extracellular environment. Cellular heine homeostasis is maintained through the coordinated regulation of synthesis, transport, and degradation. This review presents the current knowledge of the synthesis and transport of heine in metazoans and highlights recent advances in the regulation of these pathways.

Super-resolution acoustic image montage via a biaxial metamaterial lens

Ever since the Victorian era, montage, the process of pictorial composition made by juxtaposing or superimposing photographs, has been a very popular post-editing imaging technique. Despite showing a strong power in demonstrating complex wave field effects, this technique has neither been fully explored in acoustic imaging nor been realized in real-time systems with the capability beyond diffraction limits.On the other hand, the recent prospect of metamaterials has shown their great potentials in superresolution acoustic imaging. However, the miracle jigsaw of more advanced functional modulation of acoustic wave fields at deep subwavelength scale still remains elusive. Here we report the experimental implementation of super-resolution acoustic image montage through a judiciously designed biaxial metamaterial lens. Based on the non-diffraction birefringence in the biaxial metamaterials, we realized various montage functionalities such as duplication, composition, and decomposition of sound images with distinctive deep subwavelength features. Our work represents an important step in developing versatile functional acoustic metamaterial devices for imaging purposes, as it provides on-demand editing of sound field patterns beyond diffraction limits.