Design of Simulation System for Logistics in Steel-making Process

A simulation system for logistics in steel-making process has been developed by analyzing the state of logistics in steel plant, integrating the approach of coloured Petri nets with time and queuing network and using object-oriented methodology. The software functions for building-up simulation model, executing simulation, managing simulations, playing demo, analyzing statistics and online help. The objectives and principles of the simulation software have schematically been introduced. At last, the software is visually validated with measured input data of primary logistics in Vanadium-extracting, Steel-making Plant of Panzhihua Iron and Steel Corporation. A Gantt diagram and statistics of simulation case are included in simulation results and can be used to assist decision-making for scheduling in steel-making process.     

Simulation for Logistics in Steel-making Process of Panzhihua Iron and Steel Corporation

To solve potential scheduling problems in production after renewal of continuous casting process in Vanadium-extracting and Steel-making Plant of Panzhihua Iron and Steel Corporation (PISCO), how to model and simulate logistics system in steel-making processhas been discussed. A series of simulatingtests for logistics system in steel-making processhave been conducted based on inputs of presentsteel-making processof PISCO. In the tests, cases of regular schedule case and cases with repairing converter have also been regarded as essential simulation condition. It has been shown that three casters can not start at same time in order to ensure continuous hot metal supply for casters when three kinds of steel are made. It has also been shown that the simulation system for logistics system in steel-making processis valid and can be used for simulating logisticsin upcoming 100% continuous casting process of PISCO. The better schedule scheme of production and reasonable match of converter-caster in time and capacity can be achieved with the help of using simulation approach.     

Production System Changes in the Korean Consumer Electronics Sector

This paper establishes the concept of production system as an analytical framework to embrace recent industrial changes. Five dimensions of production system changes are posited. A case study of the Korean consumer electronics sector shows that the companies have experienced diverse patterns of changes, but these changes are generally related to plant location, ownership, export orientation, and company size.     

Global impact of mutation-derived varieties

During the past seventy years, worldwide more than 2250 varieties have been released that have been derived either as direct mutants or from their progenies. Induction of mutations with radiation has been the most frequently used method for directly developed mutant varieties. The prime strategy in mutation-based breeding has been to upgrade the well-adapted plant varieties by altering one or two major traits, which limit their productivity or enhance their quality value. In this paper, the global impact of mutation-derived varieties on food production and quality enhancement is presented. In addition, the economic contribution of the selected mutant varieties of rice, barley, cotton, groundnut, pulses, sunflower, rapeseed and Japanese pear is discussed. In several mutation-derived varieties, the changed traits have resulted in synergistic effect on increasing the yield and quality of the crop, improving agronomic inputs, crop rotation, and consumer acceptance. In contrast to the currently protected plant varieties or germplasm and increasing restrictions on their use, the induced mutants have been freely available for plant breeding. Many mutants have made transnational impact on increasing yield and quality of several seed-propagated crops. Induced mutations will continue to have an increasing role in creating crop varieties with traits such as modified oil, protein and starch quality, enhanced uptake of specific metals, deeper rooting system, and resistance to drought, diseases and salinity as a major component of the environmentally sustainable agriculture. Future research on induced mutations would also be important in the functional genomics of many food crops. This revised version was published online in July 2006 with corrections to the Cover Date.     

Hydraulic Stability of Conditioning-controlling Water-water Ejector Heating Unit in Heating System

The paper introduces an example and its running data of applying conditioning-controlling water-water ejector heating unit developed by the author in heating system. It proves that: the hydraulic stability of the system is very good. When heating medium of heat source and heat consumer are respective high-temperature water and low-temperature water, the hydraulic stability of the heating system is close to 1; when the flow of any consumer of heating network changes, the flow and heating quality of other consumers are almost unchanged.     

上海市水产品消费需求的双对数模型分析

为了研究上海市水产品消费需求的影响因素以及不同因素贡献度的大小,以上海市1999—2010年城市居民家庭人均水产品消费量、城市化水平、水产品价格指数、替代品价格指数、居民消费价格指数、居民家庭人均可支配收入等相关数据作为研究对象,采用Eviews软件对上海市水产品消费需求进行回归分析。建立了包括城市居民家庭人均可支配收入、居民消费价格指数、总人口数这些影响因素在内的上海市水产品消费需求模型。另外,通过建立关于城市居民家庭人均可支配收入、居民价格指数、总人口数的模型,对这些影响因素进行预测,从而可以对上海市水产品消费进行预测。最终认为,要增加上海市水产品的消费需求,必须从提高家庭人均可支配收入、控制居民消费价格指数、发展水产品深加工业、加强物流体系建设以及加强水产品市场质量管理等方面入手,推动上海水产业持续稳定的发展。     

谈茶树单株选种育种效率的提高

茶树为多年生经济作物。为了缩短育种年限,加快育种步伐,提高育种效率,主要从原始材料的采集,选繁结合,株行试验园、品比试验园和采穗母本园同步建立等几方面进行阐述,探求提高茶树育种效率的新途径。主要体会有：一是茶树原始材料的正确选择是提高单株选种工作效率和决定育种成功的关键;二是具备较全面的茶叶技术素质,有统筹全盘的工作计划;三是申报优良单株制度的建立;四是把选择、鉴定、繁育与推广紧密结合起来,实行边选择、边鉴定、边繁殖、边推广。     

Fuzzy Assessment of MSW Disposal Technologies

Three disposal technologies have their own advantages, and meanwhile disadvantages. Facing a special case, it is difficult to choose a proper one. By integrated analysis to three main technologies, a relatively integrated index system is established. Then by means of fuzzy mathematics (quantify and synthetically analyze the index system, make it unitary) ,a final general assessing model is founded. Finally, the paper takes a planning MSW(municipal solid waste) plant as an example, uses a two-level fuzzy assessment model with three groups of assessing factors,which include economical, environmeutal and the other factors, and concludes that composting is the most appropriate choice.     

基于机器视觉的植物病虫害实时识别方法

植物病虫灾害是中国三大自然灾害之一,其识别、监测、预警是防控工作的决策信息源头。联合国粮农组织的研究表明,仅农作物病虫害危害自然损失率就超过37%。中国是包括农作物在内的植物病虫害危害大国,若不采取防控措施,因病虫危害每年将损失粮食1500亿kg、果品与蔬菜1000亿kg、油料68亿kg、棉花1.9亿kg,潜在经济损失在5000亿元以上。通过植物病虫害的在线、实时、低廉、无损伤机器识别,不仅为植物病虫害防治防控提供了依据,赢得了防治时间,而且结合病虫害防治系统,最大限度地减少了经济损失,植物尤其是农产品品质得到了提升。对多种植物病虫害机器识别研究进行了综述与归纳,剖析了机器识别中的问题,认为未来的植物病虫害机器识别措施上应与病虫害监控、预测预报相结合;技术上融合机器视觉、声学、遥感、全球定位系统、地理信息系统、网络等技术;功能上进行草害信息、植物生长信息、生长环境信息自动识别等功能拓展。     

基于TD-SCDMA的农产品安全生产管理与质量追溯系统

针对已有的农产品质量安全生产管理与追溯系统多数基于PC,操作不方便,并且只采集文本信息,而不能传输多媒体信息,随着第三代通信技术的发展使多媒体的实时传输成为可能。本文提出了一种基于TD-SCDMA网络的农产品安全生产管理和质量追溯系统平台,系统综合采用3G、数据库技术、产品编码技术,以.NET为平台,实现了管理员基于PC端的中心管理、生产企业端的基于PC端的生产管理、基于TD-SCDMA的实时信息采集、传输、统计分析、条码生成并打印以及消费者质量追溯功能。该系统主要的生产操作管理和消费者追溯等均基于TD-SCDMA的手机,方便快捷。     

Recent approaches using chemical treatments to preserve quality of fresh-cut fruit: A review

This review covers some recent advances for the maintenance of fresh-cut fruit quality with respect to the use of chemical compounds, including plant natural antimicrobials and antioxidants, as well as calcium salts for maintaining texture. It focuses especially on the use of natural preservatives, which are of increasing interest because of toxicity and/or allergenicity of some traditional food preservatives. The difficulties in the application of these substances on fresh-cut fruit without adversely affecting sensory characteristics of the product are reviewed. Edible coatings are presented as an excellent way to carry additives since they are shown to maintain high concentrations of preservatives on the food surfaces, reducing the impact of such chemicals on overall consumer acceptability of fresh-cut fruit.     

生猪屠宰监管技术系统设计与实现

为控制肉品在屠宰过程中的质量安全,加强政府监管力度。以生猪屠宰监管为研究对象,从信息技术的角度构建了一个以实现质量监管为目的的生猪分级屠宰监管技术系统。设计了系统主要功能实现的流程,探讨了关键技术,开发了基于分级管理报送数据的生猪屠宰监管技术系统。结果表明：该系统在山东省的多家屠宰企业进行了试运用,使用该系统提高了政府对屠宰企业的监管水平及企业生产管理水平,增强了消费者的肉品安全意识。通过统一使用的山东省屠宰监管技术系统,将政府监管、用户监督和企业自律有机地结合起来,建立有效的监督保证机制,从而保障食品安全。从食品安全的角度,提出了一套政府监管模式,为实现猪肉质量安全全程追溯打下基础。     

Operation Optimization of Ball Type Pulverizer Based on System Identification

The ball type pulverizer system is widely used in power plant in China because of its better coal adaptability, easy maintenanceand high reliability. However, its primary disadvantageis high power consumption. Itis not only the big consumer of power plant ,but also thebig latenteconomizer. Some existentresearches mostly focus on pulverizer, not on the ball type pulverizer system. An operation optimization method is presented in the disquisitionbased on the system identification. By selecting data upon orthogonal norm , acquiring the system model through Least Squares method, and according to the theory of optimization, the authors obtain the optimal values of controlledparameters.This method can avoid disadvantageboth of searching for the input-output specialty through mechanismmodeling and big data sample space for Manual Neural Network. It is valuable in practice for the ball type pulverizer system operation optimization and economizing energy in power plant.     

CBF1转录因子基因的克隆及两种启动子调控下的植物表达载体的构建

CBF1转录激活因子能调控一组抗干旱、抗低温基因的表达,更有效地提高植物抗干旱、抗低温的能力。现在国内外许多研究机构已经利用导入该转录因子来提高植物的抗寒性、抗旱性,并且获得一定的成功,但在园林植物上的应用还有待探讨。因此,本研究以拟南芥叶片为材料,通过PCR方法对其基因组DNA扩增,成功地克隆了逆境诱导型启动子和CBF1转录因子并分别构建了花椰菜花叶病毒CaMV35s启动子和rd29a启动子调控下的CBF1融合基因表达载体,为下一步转化园林植物,利用CBF1基因综合改良园林植物抗逆性及进一步探讨CBF1基因的抗逆分子机理奠定了物质基础。     

榆林大明绿豆及其无公害高产栽培技术研究

大明绿豆是榆林市主要的食用豆类之一,是一种可作为粮、肥、药、饲、菜及饮料加工等多种用途的作物,也是榆林创汇农业的主要特色产业之一。按照无公害标准化绿豆生产技术规程组织生产,为市场提供大量优质、安全、卫生的无公害特色产品,是提升大明绿豆的品质,满足国内外消费者需求,保护环境,促进农业可持续发展的需要。大明绿豆无公害高产栽培技术体系包括产地环境选择;双沟覆膜高产栽培;去杂保纯;病虫害综合防治;适时收获脱粒,清选分级;熏蒸贮藏,加工包装等7个方面。     

宁夏中部干旱带甘草人工种植技术研究

甘草是宁夏中部干旱带重要的沙生药用植物资源,是宁夏半荒漠草地自然植被的主要组成部分。人工种植甘草必须充分围绕提升甘草的地道性而进行管理。采用乌拉尔甘草原产区的乌拉尔甘草种子,实施无污染地带种植、精细播种 、培育壮苗、分级移栽、配合施肥、三水灌溉、及早除草、及时防治病虫害、适时采收,规范化质量管理,标准化操作规程种植,可有效提高人工种植甘草的产量及质量。     

Real-Time Tracing of 200 MW Power Plant Generators By A 3~+ Network

The communication of the application program among work tations of 3+ network is realized by the shared file on harddisk of the network server,which does not support the application program' s real-time communication among the network workstations nor supplies software or hardware needed for information refreshing, nor fits for field multibatch continuous real-time transmission and processing of working condition information, by using the NETBIOS function call method, the real-time communication among network workstations is realized and a power plant working information background real-time communication and data processing system is developed which effectively traces working condition from tow 200 MW power plant generators, altogether 321 points from a cycling detecting system and 78 binary points for broadcasting the information to other workstations,and realizes a complx display of 14 working condition graphs and a real-time data simulation graph.     

U-box蛋白质的结构及其功能研究进展

泛素系统是选择性降解细胞内蛋白质的重要系统之一,U-box蛋白质是此系统中决定底物特异性识别的一种新型E3蛋白质,部分U-box蛋白质属于泛素链聚集因子-E4。U-box结构域大约由70个氨基酸残基构成,在酵母、植物和动物等真核生物中保守存在,但植物中的数目远多于动物中。该蛋白质在细胞内异常蛋白质的降解及质量控制方面具有重要的作用,了解U-box蛋白质的功能对疾病的发生控制机理有重要意义。     

AN ANALYSIS OF STIRRING ENERGY OF BOTTOM BLOWN O_2 AND CH, IN THE COMBINED-BLOWN CONVERTER

A calculation formula of stirring energy in liquid steel is set up for bottom-blown O2 and CH,| in the combined blown converter, and the main factors which have an effect on stirring energy and the variation law of stirring energy in steel-making process are discussed.     

HACCP在蒜薹贮藏保鲜中的应用

运用HACCP基本原理对蒜薹贮藏过程中潜在的危险因素进行了分析,确定了蒜薹原料控制、原料预处理、库房灭菌、贮藏等4个关键控制点,并提出了保证关键控制点临界限度和监控措施,制定了HACCP控制表,最后用食品安全性检验方法对HACCP体系检验查证,以确保蒜薹贮藏过程中的品质和安全性。