基于多目标混料设计的重介质旋流器混料成分配比

为了准确掌握重介质旋流器各混料成分之间的配比关系,明确不同配比对旋流器产出质量和产量的影响,实现分选效果的最优化.分析了现有旋流器优化和混料配比研究的不足,探讨了采用混料设计方法解决上述问题的可行性和局限性。通过设计混料试验,运行试验得到试验结果,建立混料成分与各响应变量的数学模型,分析模型的有效性,以各响应变量的同时最佳为综合约束条件进行响应优化,通过求解苛求函数复合合意度最高时的各参数值,确定各混料成分的最优配比,并通过T假设检验验证试验结果用于生产的有效性。结合某选煤厂旋流器生产运行情况,明确旋流器中块煤、悬浮液和煤泥各混料的水平要求,采用极端顶点法设计混料试验并运行试验,建立三因子与精煤灰分和产率两个响应变量之间的回归模型,分析两响应变量同时最佳条件下最优的混料配比,得到三混料成分配比依次为15.5%、59.8%、24.7%,依据上述配比进行试生产,并采用T检验验证试验结果是有效的,从而为选煤厂高效生产和精确控制提供有效的支撑,也为后期实现自动化控制提供了可能。     

中热固相法制备掺杂钛的钒酸锂正极材料

以Li2CO3和V2O5为原料,用中热固相法制备了掺杂Ti4+的锂离子电池正极材料Li1.1V3―yTiyO8(y=0.05、0.1、0.2),并对其电化学性能进行了研究。研究表明,掺杂Ti能够很好地改善中热固相法产品的电化学性能,且当y=0.1时,Li1.1V3―yTiyO8循环性能最好,首次放电比容量高达250.9 mAh/g。     

基于SAP项目的物料分类及特性的技术实现

结合中国广东核电集团的SAP实施项目中的物料管理,阐述了项目实施中的物料主数据、物料分类、分类属性的实际应用和解决方案和技术实现。通过合理地组织和管理各种数据,对提高系统性能和实现企业的业务发展目标具有参考作用。     

PbS/CoS–Pani composite semiconductor films

The synthesis and characterization of polyaniline (Pani) films embedded with PbS/CoS core–shell, having semiconductor characteristics are reported in this study. Mn²⁺ doped, PVA capped PbS/CoS core-shell particles dispersed in Pani matrix served as photoluminescent boosters. The absorption intensity of the core-shell particles–Pani hybrid increased significantly with wide spectrum response and hypsochromic effect. The Mott–Schottky plot showed a negative slope for PbS/CoS-Pani film, indicating typical p-type semiconductivity. The Tauc plot for PbS/CoS-Pani film revealed the direct transition type with a band gap of 2.36 eV. Solid state photovoltaic cells have been fabricated with PbS/CoS-Pani as the hole conductor. The cells show photocurrent of 0.93 mA/cm², voltage of 432 mV and energy conversion efficiency of 0.93%. The scanning electron micrograph revealed periodic arrangement in the polymer matrix. This arrangement of the core-shell particles in the continuous polymer matrix with high carrier density promises this material for the photoelectrochemical applications.     

Thermal conductivity measurement of the epoxies and composite material for low temperature superconducting magnet design

The thermal conductivities of solid materials were measured by a G-M cryo-cooler based apparatus in the temperature range of 2.6–21.0 K. The performance of this apparatus was verified by measuring the thermal conductivity of 304-stainless steel, and good reproducibility as well as accuracy was shown when compared with the certified values. The thermal conductivities of EC1017 and Stycast2850FT and a composite material were measured. Similar behavior to amorphous materials was shown for EC1017 and Stycast2850FT in that there was an apparent plateau, which could be ascribed to a very lower crystallinity of epoxy. An equivalent model was proposed to predict the thermal conductivity of the composite material.     

热轧带肋钢筋拉伸试验结果的不确定度评定

根据钢筋检验及评定标准,对3件热轧带肋钢筋用直接评定法进行了强度检验结果的不确定度评定,给出了合成及扩展不确定度的评定结果。     

Investigation of structural and optoelectronic properties of BaThO3

Structural and optoelectronic properties of BaThO₃ cubic perovskite are calculated using all electrons full potential linearized augmented plane wave (FP-LAPW) method. Wide and direct band gap, 5.7 eV, of the compound predicts that it can be effectively used in UV based optoelectronic devices. Different characteristic peaks in the wide UV range emerges mainly due to the transition of electrons between valance band state O-p and conduction band states Ba-d, Ba-f, Th-f and Th-d.     

提高韶冶烧结氧化物料处理能力的研究与应用

介绍韶冶在氧化物料对工厂生产经营和现场环境造成不利影响的条件下,通过设备、工艺两方面的研究,提高氧化物料处理能力,从而增强烧结工艺对原料的适应性,使干精矿含硫降低,烧结机产能大幅度提升,烧结块质量保持较高水平,年创效益约2 500万元。     

塑料模板在工程顶板施工中的应用

在北京市丰台区宋家庄经济适用房BC区住宅楼工程顶板混凝土施工中,全部采用了GMT塑料模板。该塑料模板具有周转率高、表面平整光洁、强度高、稳定性好、可回收再利用等特点,作为顶板模板使用具有较好的推广价值。     

浅谈建筑工程价格管理中的成本控制

简述了我国建筑工程造价的发展过程,从人工、机械、材料、工期等方面具体阐述了合理控制工程成本的方法,以期指导施工企业以尽量少的人、机、料消耗创造较大的价值和效益。