系统数字频响分析中若干条件的辨析及应用

讨论系统数字频响分析中的线性、时不变、因果、稳定、奇偶虚实分解及其对应等推导求解的条件,明确了如何正确应用这些条件.     

Optimal Dispatching of Large—scale Water Supply System

This paper deals with the use of optimal control techniques in large-scale water distribution networks. According to the network characteristics and actual state of the water supply system in China, the implicit model, which may be solved by utilizing the hierarchical optimization method,is established. In special, based on the analyses of the water supply system containing variable-speed pumps, a software tool has been developed successfully. The application of this model to the city of Shenyang (China) is compared to experiential strategy. The results of this study show that the developed model is a very promising optimization method to control the large-scale water sup-ply systems.     

双语制对语言本身及社会生活的影响:以壮族地区为例

以壮族地区双语制为主要考察对象,提供新的材料,并从新的角度进行探讨。结论要点是:一是壮族地区双语现象的量化分析结果;二是双语制给壮语语音、词汇、语法系统带来了明显的影响;三是双语制给汉语有关方言的语音、词汇、语法系统也带来了明显的影响;四是双语制需要有与之相适应的语文政策。     

广西自然保护区建设与管理

广西壮族自治区位于欧亚大陆的东南部,面临北部湾,自北至南跨中亚热带、南亚热带和北热带,优越的地理和复杂多样的自然环境条件,孕育着繁多的生物资源。保护生物物种资源及其栖息环境的重要措施和最有效的手段就是建立自然保护区,到2001年为止,广西已建立了各种类型、不同级别的自然保护区的64处,总面积1 6万km2,占广西国土面积的6 7%。本文简述了广西自然保护区建设与管理现状,并对存在的问题与对策提出了合理化的建议。     

In-vehicle GPS/DR navigation system development and test results in Singapore

This paper introduces the in-car navigation system prototype development and test results under the context of Singapore. In the system, integrated GPS/DR is used for continuous vehicle positioning. A digital road network map database is built for the whole Singapore. The database is designed to support map matching, route determination, and route guidance functions. The prototype system demonstrates GPS positioning of the vehicle in real-time, tracking the vehicle onto a digital map with fix updates every one or two seconds.With the map matched vehicle location on the map, voice and/or text guidance is provide to the driver. The vehicle position can also be transferred to control centre through communication data link for the purpose of fleet management.     

Disaster Reduction Decision Support System Against Debris Flows and Landslides Along Highway in Mountainous Area

Highways in mountainous areas are easy to be damaged by such natural disasters as debris flows and landslides and disaster reduction decision support system (DRDSS) is one of the important means to mitigate these disasters. Guided by the theories and technologies of debris flow and landslide reduction and supported by geographical information system (GIS), remote sensing and database techniques, a DRDSS against debris flow and landslide along highways in mountainous areas has been established on the basis of such principles as pertinence, systematicness, effectiveness, easy to use, open and expandability. The system consists of database, disaster analysis models and decisions on reduction of debris flows and landslides, mainly functioning to zone disaster dangerous degree, analyze debris flow activity,simulate debris flow deposition and diffusion, analyze landslide stability, select optimal highway renovation scheme and plan disaster prevention and control ergineering. This system has been applied successfully to the debris flow and landslide treatment works along Palongzangbu Section of Sichuan-Tibet Highway.     

高校学科导航资源的知识组织模式及优化

就目前国内外学科资源导航建设现状 ,CALIS学科导航项目建设进展 ,导航库知识组织模式 ,Web站点信息资源的维护方案 ,信息技术对组织模式的影响 ,网络信息资源评价体系的建设方法、指标 ,建立信息质量控制机制和体系 ,信息的优化方案等问题做了探讨 ,分析了网络信息组织的发展趋势 .由此为用户提供具有较高可信度的网络信息资源的有效服务     

Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system of the human tumor cell growth

Adenovirus 5 type E1A as a tumor suppressor gene can inhibit tumor growth and enhance the censitivity of chemotherapy and radiotherapy.E1A have the ability to integrate into the host genome,resulting in long-time expres-sion that induces Rb gene inactivation and animal cells im-mortalization.This prompted us to select the E1A protein for treatment of cancer in order to overcome the limitations of E1A gene therapy.Thus,we firstly comstructed E1A eu-caryotic expression vector (pPIC9/E1A),transformated the pichia pastoris yeast cells(GS115) and screened the high-expressing recombinant strains.The positive yeast strains were cultured in the shake flask,and induced for 3d.The crude E1A protein was purified using two steps of col-umu chromatography on HiTrap Q and HiTrap SP.The pu-rified E1A protein was identified by SDS-PAGE and Western blot.E1A protein was mostly located at cellular unclear when Cheriot delivered E1A protein into cells.The analysis in vitro indicated that the E1A protein arrested LN686 cell cycle at G2/M phase,and significantly inhibited the growth of LN686 tumor cells.The current studies firstly provided an experimental basis to further develop E1A protein for tumor treatment.     

论中西管理文化融合创新的趋同

中西管理文化的融合创新，应立足各自传统管理文化原创中的现代价值，结合世界经济一体化发展的需要，进行现代管理文化理念的创新，并且在管理实践融合创新的基础上实现理念与认识的趋同。     

浅谈高校电化教育技术队伍的建设与管理

电化教育是高等院校现代化教学、科研的重要技术手段，由于它在教学活动中以其特有的表现形式，不受时间、空间的限制，对扩大教育规模、缩短教学周期、提高教学质量、降低教育成本有着传统教学无可比拟的作用。近年来，由于科学技术的飞速发展，传统电化教育与网络技术相结合，进一步深化了电化教育的内涵。高新技术在新设备层面上的展示，则对高等院校如何建设一支新型的电化教育技术队伍提出了新的要求。