优良野生地被植物唐古特莸扦插育苗技术研究

唐古特莸是观赏价值较高的优良野生地被植物。本文针对唐古特莸温室扦插育苗,开展其不同基质及不同时期育苗试验。通过试验选择适合其快速繁殖的扦插基质及扦插时间。     

Efficient short-term scheduling of multiproduct batch plants under demand uncertainty

In this paper, a novel formulation for the short-term scheduling of multiproduct batch plants under demand uncertainty is presented. Then it is solved by an improved genetic algorithm. The proposed approach results in an efficient utilization of the plant capability as it allows the optimal selection among all the rescheduling alternatives in a systematic way without the use of any heuristics. Moreover, the objective function can not only maximize the total profit of the plant and minimize the makespan but also allow the flexibility for mod- eling different weighted instances of the two targets so that a best-possible decision can be determined. According to the discrete char- acteristic of scheduling of batch plants, through the improvement of the coding method, an effective genetic algorithm is presented. Two examples are given to illustrate the effectiveness of the proposed formulation and algorithm.     

关于太原市交通拥堵问题的思考

城市道路交通不仅是一个如何达到便捷高效,提高人流、货流通畅效率问题,也是一个从根本上改善人居环境质量,有利于可持续发展的重要战略问题.作为为百姓提供公共服务的政府,必须将城市道路交通问题作为其工作的第一要务.应从政策、投资、建设、管理和规划上认真加以解决,改善交通环境,实现城市经济和社会的可持续发展.     

论高校隐性知识管理

分析了隐性知识的特点和价值,并就高校隐性知识的有效管理提出了若干措施。     

Clinical investigation of surgery for intermittent exotropia

Objective： To investigate the time and postoperative binocular vision of strabismus surgery for children with intermittent exotropia （X（T））. Methods： A retrospective investigation was conducted in 80 child patients with intermittent exotropia. Pre- and postoperative angles of deviation fixating at near （33 cm） and distant targets （6 m） were measured with the prolonged alternate cover testing. The binocular function was assessed with synoptophore. Twenty-one patients took the postoperative synoptophore exercise. Results： （1） A week after surgery, 96.2% of the 80 patients had binocular normotopia, while a year after surgery, 91.3% of the 80 patients had binocular normotopia; （2） Preoperatively, 58 patients had near stereoacuity, while postoperatively, 72 patients achieved near stereoacuity （P〈0.05）; （3） Preoperatively, 64 patients had Grade Ⅰ for the synoptophore evaluation and postoperatively, 76 patients achieved Grade Ⅰ. Meanwhile, 55 patients had Grade Ⅱ preoperatively and 72 achieved Grade Ⅱ postoperatively. For Grade Ⅲ, there were 49 patients preoperatively and 64 patients postoperatively （P〈0.05）; （4） Patients of 5-8 years old had a significantly better recovery rate of binocular vision than those of 9-18 years old （P〈0.05）; （5） Patients taking postoperative synoptophore exercise had a better binocular vision than those taking no exercise （P〈0.05）. Conclusions： （1） Strabismus surgery can help to preserve or restore the binocular vision for intermittent exotropia; （2） Receiving the surgery at young ages may develop better postoperative binocular vision; （3） The postoperative synoptophore exercise can help to restore the binocular vision.     

4腿机器人足球比赛的通信机制及协作控制

针对4腿机器人足球比赛中机器人的通信机制及协作控制等问题,提出了一种新的完整的分布式多主体系统控制方法,包括通信控制、路径规划以及动态角色分配.该方法通过启发式投标函数进行任务分配,通过电场法表示抽象的环境信息.协作控制中不必进行大量的计算,主体之间不必频繁地进行数据交换.该方法能够满足比赛动态性和不确定性的需要,并在实际比赛中得到了很好的验证.     

添加电熔MgO-ZrO2共晶砂对低MgO-C砖性能的影响

在以电熔镁砂、鳞片石墨为原料、酚醛树脂为结合剂的低碳MgO-C砖中,分别添加10%,15%,20%的电熔MgO-ZrO2共晶砂替代镁砂,经200,1 000,1 500 ℃处理后,对材料的体积密度、显气孔率、耐压强度、线变化率、热膨胀率和抗氧化性进行了检测,并借助XRD研究了试样的物相组成和显微结构.结果表明,随着电熔MgO-ZrO2共晶砂加入量的增加,试样的体积密度逐渐增大,线变化率逐渐减小,耐压强度和抗氧化性均为先增大后减小,试样的热膨胀率逐渐减小,抗热震性得到提高.材料性能的变化主要与电熔MgO-ZrO2共晶砂的体积密度大、热膨胀系数小、氧化锆的相变、镁铝尖晶石和镁橄榄石等物相的生成相关.     

中国铀矿采冶技术发展与展望

对中国铀矿采冶工业的发展作了全面的回顾,重点介绍了中国铀矿地浸、堆浸、原地爆破浸出技术的研究进展与应用水平;在对中国铀矿采冶形势和存在的问题分析的基础上,结合矿床资源的特点,指出了中国铀矿采冶技术发展的方向。21世纪中国铀矿冶工业面临新的发展机遇和挑战,只有开发新的采、选、冶技术,提高铀资源的利用水平,减少铀矿采冶对环境的影响,才能实现铀矿冶的可持续发展和经济与环境的协调发展。     

应用胶束电动色谱和模式识别技术溯源茶叶产地的研究

采用胶束电动色谱法(MEKC)建立了2类共11个中国红茶样品的色谱指纹图谱,结合模式识别技术对不同产地来源的红茶加以区分.红茶样品的处理方法:去离子水(100℃)浸取10 min.MEKC色谱条件:缓冲溶液25 mMNa2HPO4-KH2PO4-100mM SDS-0.6%甲醇(V/V)-1 mM EDTA(pH7.0...     

基于HS-SPME/GC-MS与模式识别技术判别红茶产地

本文建立一种基于顶空固相微萃取气质联用法(HS-SPME/GC-MS)分析红茶中挥发性组分,并结合模式识别方法实现了红茶的产地鉴别.采用HS-SPME法在100℃提取60 min,热解吸法直接进样气质联用仪(GC-MS)分析.根据挥发性组分的总离子流图,采用聚类分析、主成分分析和线性判别分析等模式识别技术实现了对不同产地红茶的判别.