速生树碱性亚钠法制浆的研究

本文对速生树的碱性亚钠法制浆作了较为详细的系列研究，确定了用这种制浆法制造可漂白软浆的蒸煮条件。     

预处理对纸浆无污染漂白的影响

分析比较了酸预处理及螯合剂预处理对未漂浆中金属离子分布及浆质量的影响以及对预处理浆漂白效果的影响。结果说明,纸浆无污染漂白前的预处理是改善未漂浆金属离子分布,提高漂白效果的重要措施;而且酸预处理比螯合剂预处理效果要好,经济上也是可行的。     

ONP脱墨浆的可漂性研究

ONP脱墨浆往往需要进一步漂白。对5种用不同脱墨剂处理的ONP脱墨浆进行了H2O2漂白实验,结果表明不同脱墨剂处理的ONP白度增加幅度不相同,各脱墨浆的可漂性并不相同。实际使用ONP脱墨浆时需考虑其漂后白度增幅潜力。     

基于PLC的矿浆浓度和干矿重量测量系统的设计与应用

在选矿生产过程中,需要及时获取矿浆浓度和干矿重量,以便指导生产。传统测量方法在实时性、准确度及适用范围方面存在不足。针对这些不足,研究了一套基于PLC的测量系统,实现在线对矿浆浓度和干矿重量测量。通过对测量系统和PLC系统的软件和硬件的优化设计,获得了一套稳定可靠、准确方便的系统。目前,该系统已经成功应用于生产,在半年的统计周期内,矿浆浓度平均误差为0.92%,干矿重量平均误差为0.57%,在实际使用中取得了很好的效果。     

清洁生产技术在草浆造纸工业中的应用

根据造纸工业清洁生产标准,分析了麦草造纸工业生产中的几个关键清洁生产技术,提出了实现途径,具有推广应用价值和显著的经济效益。     

An investigation of the use of cellulose-based materials to gap-fill wooden objects†

The conservation of wooden objects is complicated by their response to changes in their environment. In particular, filling voids in wooden objects can be difficult when their dimensions might be expected to alter over time. A short survey of conservators showed that a wide variety of materials have been, and are being used for this purpose. Following conservation work undertaken on a wooden coffin, the author wished to investigate the properties of cellulosic materials and their suitability in the conservation of wooden objects. This paper shares the results of experiments that were conducted to determine the way in which hydroxypropyl cellulose (HPC) and paper pulp fills respond in various conditions, as compared to other fill materials used by conservators. The compatibility of the HPC and paper pulp fills with wood is satisfactory enough to be able to recommend their use in the conservation of wooden artefacts, but ideally further experiments would be carried out, and on a wider variety of fill materials.     

神经模糊控制的纸浆专家系统设计

为了控制纸浆浓度的稳定性并提高纸浆的质量,对碎浆工序的时间进行智能模糊控制．结合神经网络;和模糊控制技术,利用经验数据和隶属函数生成相应控制规则．控制系统根据纸浆浓度和浓度变化率自动控制碎浆的时间．仿真实验表明,控制系统具有良好的记忆和联想功能且性能稳定．     

治疗96例乳磨牙髓室底穿孔的临床观察

乳磨牙在儿童生长发育期,对恒牙正常萌出,排列具有重要意义．本文对９６例应用盖维他（Ｃａｌｖｉｔａｌ）加少许碘仿修补乳磨牙髓底穿孔的病例进行了观察,随访半年、１年、２年;结果显示：２年的成功率８６．７％,２年的失败率为１３．３％,表明髓底穿孔应用本法修复,效果良好．     

Three-Dimensional Tooth Models with Pulp Cavity Enhance Dental Anatomy Education

Dental anatomy is an integrated, core fundamental dental course, which prepares students for all future clinical dental courses. This study aimed to build up an online dental learning platform of micro-computed tomography-based three-dimensional (3D) tooth models with pulp cavity, and to further evaluate its effectiveness for dental anatomy education using a cohort study. First, ninety-six extracted permanent teeth were scanned by micro-computed tomography and the enamel, dentine, and pulp cavity of each was distinguished by different grey-scale intensities using Mimics software. Three-dimensional images allowed further discrimination and insights into permanent three-rooted premolars, central tip, and dental diseases including deep caries and wedge-shaped defects. Furthermore, a second mesiobuccal canal (MB2) in maxillary permanent molar teeth and Vertucci type III root canal configuration in mandibular anterior teeth could be detected using the 3D analytical tool. A digitized 3D tooth model learning platform was implemented. Last, two groups of dental students were assessed to evaluate the effect of 3D models on dental anatomy education. Participants in the Digital group were allowed to use the online dental learning platform freely after class, while the participants in the Traditional group were not. Assessment quizzes showed that participants' scores improved in the Digital group with the use of the learning platform compared with scores in the Traditional group. A questionnaire survey indicated that the participants had a positive attitude toward the 3D models. Thus, adding digital 3D resources to a traditional curriculum may have a positive effect on academic achievements.     

水泥砼路面板底压浆及讨论

水泥砼路面板底压浆技术是解决水泥砼路面唧泥、脱空等病害的有效养护方法,可以减缓 裂缝、沉陷等病害的发展,对改善行车质量,延长水泥砼路面的使用寿命,降低养护成本具有较好的社会经 济效益.对其有关问题进行了讨论.