用LG55冷轧管机轧制小直径不锈钢管孔型改进

介绍了ＬＧ５５冷轧管机使用Φ７～３２ｍｍ、Φ５０～３２ｍｍ孔型轧制小直径不锈钢管的工艺特点。试验表明，两种孔型可行，且Φ５７～３２ｍｍ孔型的综合使用效果更好。     

高强度工程机械用钢LG700QT的开发

高强度工程机械用钢LG700QT,采用低碳低合金化学成分设计,运用控制轧制和控制冷却技术,轧后进行调质热处理,使LG700QT钢具有高强度、高韧性和良好的焊接性能。     

Dielectrophoresis‐Assisted Integration of 1024 Carbon Nanotube Sensors into a CMOS Microsystem

Carbon‐nanotube (CNT)‐based sensors offer the potential to detect single‐molecule events and picomolar analyte concentrations. An important step toward applications of such nanosensors is their integration in large arrays. The availability of large arrays would enable multiplexed and parallel sensing, and the simultaneously obtained sensor signals would facilitate statistical analysis. A reliable method to fabricate an array of 1024 CNT‐based sensors on a fully processed complementary‐metal‐oxide‐semiconductor microsystem is presented. A high‐yield process for the deposition of CNTs from a suspension by means of liquid‐coupled floating‐electrode dielectrophoresis (DEP), which yielded 80% of the sensor devices featuring between one and five CNTs, is developed. The mechanism of floating‐electrode DEP on full arrays and individual devices to understand its self‐limiting behavior is studied. The resistance distributions across the array of CNT devices with respect to different DEP parameters are characterized. The CNT devices are then operated as liquid‐gated CNT field‐effect‐transistors (LG‐CNTFET) in liquid environment. Current dependency to the gate voltage of up to two orders of magnitude is recorded. Finally, the sensors are validated by studying the pH dependency of the LG‐CNTFET conductance and it is demonstrated that 73% of the CNT sensors of a given microsystem show a resistance decrease upon increasing the pH value.     

我国建设工程项目管理的发展历程和趋势探析

通过"鲁布革"工程,建筑业进行了企业生产关系的大变革,但并没有把科学优化施工技术方案作为"鲁布革"经验的重点。提出进一步提升施工生产方式,就要发展以"减少工程量、降低消耗量、确保高质量"为核心内容的工程总承包。"LG"工程经验是继"鲁布革"工程之后的第二次冲击,冲击的目标是建立适应工程总承包需要的行业管理体制和企业运行机制。     

基于GMPLS的动态分布式WDM网状网路由选择算法研究

研究了在基于GMPLS的WDM网络中,当节点不具备波长变换能力并且配备有限个光收发器对时,如何为到达的业务请求建立标记交换路径(LSP)的问题。提出一种以跳数和带宽碎片要求为权重,合理分配带宽资源的新算法。仿真结果表明,该算法在保证用户业务可靠性要求的同时,能够更有效地提高全网资源的利用率,并大大降低网络阻塞的可能性。     

Composition and characterization of simulated putrescible garbage

The composition and characterization of liquidised garbage (LG) during liquidisation process were carried out to access various properties, viz., moisture, organics, ash, elemental composition, suspension stability, flow characteristics, higher heating value (HHV), glucose and total organic carbon (TOC) for getting preliminary information about liquidisation as a pre-treatment process for anaerobic digestion of simulated garbage (SG). Minimum moisture and maximum organic content were found as 750 and 850 g kg⁻¹, respectively. From elemental analysis, C/N ratio obtained was suitable for the growth of microbes. The HHV of dried solid phase for LG at 393 K was higher than that of mechanically ground garbage (MEC). The LG was regarded as a pseudo plastic liquid from values of flow behaviour index obtained. The amount of glucose was found to be decreased during liquidisation process. The amount of TOC in both solid and liquid phase of LG was more as compared to MEC.     

四拉盖尔高斯光束在大气湍流中传输时的闪烁研究

采用相位屏法模拟仿真,对四拉盖尔高斯光束(Laguerre Gauss,LG)在大气湍流中传输时的闪烁性能进行了研究.结果表明:与单LG光束相比,四LG光束可以降低光传输中的闪烁指数;和外尺度相比,内尺度对光束闪烁指数的影响较大;光束的拓扑荷或者径向量子数越大,四LG光束的闪烁指数越大;当光束之间的距离取合适的值时,LG光束在大气湍流中的闪烁指数可取得最小值.     

韩国电信市场发展与政府管制

从管制机构与管制政策两个方面介绍了电信市场管制的基本情况.从非对称管制、资费管制、要求移动运营商提供用户手机号码薄以及对移动信息内容的管制四方面阐述了韩国政府的管制政策.说明了韩国移动市场的发展情况以及韩国近期的购并活动.     

LG植物胶无固相冲洗液在富煤二矿906号孔的应用

云南富源县大河富煤二矿矿区地层复杂,上部永宁镇组厚层灰岩破碎、掉块、漏水严重,并有溶洞发育,下部煤系地层多为泥岩、泥质粉砂岩、炭质泥岩等水敏性强的地层。在钻进过程中易造成水化膨胀、缩径、坍塌等问题,增加了护壁的难度。针对该矿区的地层特征,采用LG植物胶无固相冲洗液顶漏钻进,成功地穿越了6 m厚粉煤,未发生坍塌,取得了较好的护壁效果,而且比较经济、安全、快速地完成了钻孔,为今后施工类似钻孔取得了宝贵的经验。     

3D-Si/LG5复合材料微观组织及热物理性能研究

采用压力浸渗技术制备Sip/LG5复合材料并对其进行高温扩散处理。组织观察表明:复合材料增强体形貌经过高温扩散处理后由不规则的尖角形状转变为三维网络结构(3D)。对3D-Si/LG5复合材料界面的研究表明,与高温扩散处理前复合材料的界面相比,三维网络结构3D-Si/LG5复合材料的界面更光滑,界面结合程度也更好。三维网络结构3D-Si/LG5复合材料界面处及基体合金内部有Si析出,基体合金中存在着孪晶;三维网络结构3D-Si/LG5复合材料的平均线膨胀系数与高温扩散处理前相比,降低了10.5%;增强体三维网络化减少界面及基体中大量细小弥散的Si析出,使得三维网络3D-Si/LG5复合材料的热导率变化不大。