渣油催化临氢热转化钼铁双金属催化剂的研究

Replacement of precious single metal catalysts with cost-effective, highly-dispersed composite catalysts for catalytic hydrothermal conversion of residue holds tremendous promise for the residue upgrading technologies. Organic metals were added to the feed as the oil-soluble precursors, and transformed into the catalytic active phases in this work. Physical properties and structures of the composite catalysts had been investigated by X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscope and transmission electron microscopy. The composite catalysts were found to be highly efficient in the catalytic hydrothermal conversion of both model compound and residue. Increased metal dispersion and synergistic effects of two metals played indispensable roles in such catalytic system. Results showed that under the test conditions in the article, the catalyst had the best catalytic performance when the mass ratio of molybdenum to iron was 1.5.     

移动运营商手机游戏业务的战略定位和发展策略探讨

分析了韩国、日本及国内运营商手机游戏业务的发展状况．探讨了手机游戏业务的模式．论述了该业务的战略定位和市场前景。从地区提供给移动通信市场对外部环境、产业链的准备是否充分以及运营商内部的资源和运营状况等三个方面阐明了手机游戏业务发展的关键因素。     

浅谈工程成本管理信息化

企业管理者一直以来都是利用各种各样的信息来帮助实现他们企业经营的目标。因此．信息管理对于企业经营者来说并不是新课题．但如何获得最准确的信息和如何更有效地使用信息却是企业管理者面临的难题。计算机的出现使这一切成为可能。现代管理科学和计算机技术、信息技术相结合是企业管理发展的方向．特别是在工程项目管理中，涉及到业主、设计方、承包商、施工方、材料供应商、监理等各方，他们之间存在着信息不对称且代表利益不同的特点，所以构建一个信息平台，保证沟通交流的顺畅进而发展到对项目进行管理．是建筑企业当务之急。     

BRCM三维电缆桥架软件在余热发电设计中的应用

在余热发电项目中，电缆桥架及电缆敷设一直是设计和施工比较复杂的工作，引入电气三维设计软件BRCM后，减少了通常的二维设计中空间布局不合理等问题，避免了与其他专业的碰撞，提高了设计效率。现以我公司CMIC余热发电项目为例，介绍项目设计流程、项目三维模型和统计材料等方面，通过运用BRCM电缆桥架三维设计软件，阐明项目设计和施工中的优势。     

A sink moving scheme based on local residual energy of nodes in wireless sensor networks

In the application of periodic data-gathering in sensor networks, sensor nodes located near the sink have to forward the data received from all other nodes to the sink, which depletes their energy very quickly. A moving scheme for the sink based on local residual energy was proposed. In the scheme, the sink periodically moves to a new location with the highest stay-value defined by the average residual energy and the number of neighbors. The scheme can balance energy consumption and prevent nodes around sink from draining their energy very quickly in the networks. The simulation results show that the scheme can prolong the network lifetime by 26%–65% compared with the earlier schemes where the sink is static or moves randomly. Foundation item: Project(60673164) supported by the National Natural Science Foundation of China; Project(20060533057) supported by the Specialized Research Foundation for the Doctoral Program of Higher Education of China     

中国的新能源挑战

新能源有多重要？看看美国总统奥巴马,这位被美国人寄予厚望的新总统上台后打出的第一张牌就是新能源牌,预计在未来十年,美国将投入1500亿美元（约1万亿人民币）,用于促进可再生能源的商业规模扩大。未来的能源格局将由资源主导转向科技主导,设备和技术是决定能源利用状况的关键因素。在不久的将来,     

西安将成为一座创业型城市

作为西部大开发桥头堡的西安,将在这一轮的西部大开发中赢得怎样的发展机遇？党中央、国务院召开了西部大开发工作会议,制定下发了《关于深入实施西部大开发的若干意见》（下称《意见》）。今后十年是深入推进西部大开发的关键时期,也是西发市发展的关键时期,西安面临诸多发展机遇。