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低定量新闻纸打浆和加填工艺 被引量:2
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作者 孙丽红 李新平 叶世城 《纸和造纸》 北大核心 2008年第1期18-21,共4页
结合福建南平新闻纸生产实际情况,对生产低定量新闻纸的打浆工艺、浆料配比、填料优选做了较详细的研究,得出最佳工艺条件为:打浆度范围:DIP60~65°SR,TMP63~68°SR;浆料配比:DIP75%~85%,TMP25%~15%;填料选择南纸自制滑石粉... 结合福建南平新闻纸生产实际情况,对生产低定量新闻纸的打浆工艺、浆料配比、填料优选做了较详细的研究,得出最佳工艺条件为:打浆度范围:DIP60~65°SR,TMP63~68°SR;浆料配比:DIP75%~85%,TMP25%~15%;填料选择南纸自制滑石粉,用量控制在3%~7%。 展开更多
关键词 打浆 浆料配比 填料 纸物理性能
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造纸生产线上基于1(1/2)维倒谱分析的断纸预报 被引量:2
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作者 周强 南楠 韩九强 《中国造纸学报》 EI CAS CSCD 2008年第3期97-101,共5页
在造纸生产中,当断纸将要发生时,纸张水分、定量,纸浆浓度及纸机车速等与断纸相关的物理量变化剧烈,其随机成分的非平稳性迅速增强。利用这一现象,分离出断纸相关信号中的随机变量,并计算其1(1/2)维倒谱。根据不同时刻之间倒谱距离反映... 在造纸生产中,当断纸将要发生时,纸张水分、定量,纸浆浓度及纸机车速等与断纸相关的物理量变化剧烈,其随机成分的非平稳性迅速增强。利用这一现象,分离出断纸相关信号中的随机变量,并计算其1(1/2)维倒谱。根据不同时刻之间倒谱距离反映的随机信号非平稳化程度,对断纸过程做出准确预报。在预报的基础上及时调整工艺过程,能够有效预防断纸发生。将这种方法应用于生产预报效果显著。 展开更多
关键词 3/2维倒谱 预报 相关物理 非平稳特性 PID断预测器
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水松原纸的生产 被引量:1
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作者 王敏 《江苏造纸》 2007年第4期37-38,共2页
介绍了水松原纸的生产工艺流程、工艺条件、成纸物理指标、生产中易出现的问题及解决措施和注意事项。
关键词 水松原 工艺流程 工艺条件 纸物理指标 措施
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聚丙烯酰胺类干强剂在造纸中应用的问题及处理
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作者 吉子民 张新东 《造纸化学品》 CAS 2011年第4期27-30,共4页
该文分析了在日益复杂的造纸生产环境中,影响聚丙烯酰胺类干强剂使用效果的因素,并介绍了常见问题的处理方案。
关键词 聚丙烯酰胺 电荷需求量 纸物理强度
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A COGNITIVE AND MEMETIC SCIENCE APPROACH TO ANALYZE THE HUMAN FACTORS IN PREDICTING THE EVOLUTION OF PAPER TECHNOLOGY AND PRODUCTS IN THE 21^(sT) CENTURY
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作者 尾鍋史彦 《天津科技大学学报》 CAS 2004年第A02期324-328,共5页
21世纪制纸技术。
关键词 2l世纪 技术 人类要素分析 认识科学 文化遗传基因 感性科学 媒介 电子书 数字式内容 纸物理 认识心理学
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英国GCE A-level物理纸笔考试——评分方案探析
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作者 程力 《物理教学》 北大核心 2010年第12期56-57,34,共3页
英国GCE A-level物理纸笔考试广泛采用主观题,其评分方案设计有许多鲜明的特点,如制定评分方案的规则,设计科学、合理的评分量表,重视书面表达质量,强调评分方案与考试大纲的匹配等,这对我国中学物理考试评分方案的设计具有重要... 英国GCE A-level物理纸笔考试广泛采用主观题,其评分方案设计有许多鲜明的特点,如制定评分方案的规则,设计科学、合理的评分量表,重视书面表达质量,强调评分方案与考试大纲的匹配等,这对我国中学物理考试评分方案的设计具有重要的借鉴意义。 展开更多
关键词 GCE A—level 物理笔考试 评分方案
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Physical Modelling of the Drained Flow on a Suction Box of a Papermachine
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作者 Jean-Claude Roux Martine Rueff 《Journal of Chemistry and Chemical Engineering》 2011年第2期165-169,共5页
Suction boxes are used in the paper industry to simultaneously drain a pulp suspension and form a fibre mat (or filter cake). This research addresses the modelling of fibre deposition in the forming unit of an indus... Suction boxes are used in the paper industry to simultaneously drain a pulp suspension and form a fibre mat (or filter cake). This research addresses the modelling of fibre deposition in the forming unit of an industrial papermachine, assuming a filtration process, and that of the flowing suspension drained through the building fibre mat and the wire on a suction box. From experimental data of the cumulative drained V volume, per unit surface area, for two vacuum pressures △P and 6 dwell times t, an extension of the classical law (t/V) versus V is proposed, validated and applied. This relation enables determining the average specific filtration resistance of the fibre mat over the box and the mass of solids deposited before and over the suction box. The model obtained is as precise as 1% and can be used to limit and reduce the energy consumption of drainage vacuum assisted devices such as suction boxes in the forming unit of industrial papermachines. 展开更多
关键词 Papermachine suction box physical modelling specific filtration resistance fibre deposition "dead-end" filtration
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A Comparative Simulation:Difference between Chemical Grafting and Physical Doping of Cellulose by Using Polysilsesquioxane
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作者 Lu Yang Dong-yuan Du +1 位作者 Jing-wen Zhang Chao Tang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2021年第2期165-172,I0001,共9页
In order to study the effect of different modification methods on polysilsesquioxane(POSS)modified cellulose,a molecular dynamics method was used to establish a pure cellulose model and a series of modified models mod... In order to study the effect of different modification methods on polysilsesquioxane(POSS)modified cellulose,a molecular dynamics method was used to establish a pure cellulose model and a series of modified models modified by polysilsesquioxane in different ways.And their thermodynamic properties were calculated.The results showed that the performance of cellulose models was better than that of unmodified model,and the modified effect was the best when two cellulose chains were grafted onto polysilsesquioxane by chemical bond(M2 model).Compared with pure cellulose model,the cohesive energy density and solubility parameters of M2 model are increased by 9%,and the values of tensile modulus,bulk modulus,shear modulus and Cauchy pressure increased by 38.6%,29.5%,41.1% and 29.5%,respectively.In addition,the free volume fraction and mean square displacement of each model were calculated and analyzed in this work.Compared with the pure cellulose model,the molecular chain entanglement of cellulose was increased due to the existence of the chemical bonds in the M2 model,which made the cellulose molecular chains occupy more free volume,so that the system had a smaller free volume fraction,inhibited the chain movement of cellulose chains,and thus improved the thermal stability of cellulose. 展开更多
关键词 CELLULOSE POLYSILSESQUIOXANE Chemical grafting Physical doping
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Simultaneous inference of phenotype-associated genes and relevant tissues from GWAS data via Bayesian integration of multiple tissue-specific gene networks 被引量:1
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作者 Mengmeng Wu Zhixiang Lin +3 位作者 Shining Ma Ting Chen Rui Jiang Wing Hung Wong 《Journal of Molecular Cell Biology》 SCIE CAS CSCD 2017年第6期436-452,共17页
Although genome-wide association studies (GWAS) have successfully identified thousands of genomic loci associated with hun- dreds of complex traits in the past decade, the debate about such problems as missing herit... Although genome-wide association studies (GWAS) have successfully identified thousands of genomic loci associated with hun- dreds of complex traits in the past decade, the debate about such problems as missing heritabiUty and weak interpretability has been appealing for effective computational methods to facilitate the advanced analysis of the vast volume of existing and antici- pated genetic data. Towards this goal, gene-tevel integrative GWAS analysis with the assumption that genes associated with a phenotype tend to be enriched in biological gene sets or gene networks has recently attracted much attention, due to such advan- tages as straightforward interpretation, tess multiple testing burdens, and robustness across studies. However, existing methods in this category usually exploit non-tissue-specific gene networks and thus lack the ability to utilize informative tissue-specific characteristics. To overcome this limitation, we proposed a Bayesian approach called SIGNET (Simultaneously Inference of GeNEs and Tissues) to integrate GWAS data and multiple tissue-specific gene networks for the simultaneous inference of phenotype- associated genes and relevant tissues. Through extensive simulation studies, we showed the effectiveness of our method in find- ing both associated genes and relevant tissues for a phenotype. In applications to real GWAS data of 14 complex phenotypes, we demonstrated the power of our method in both deciphering genetic basis and discovering biological insights of a phenotype. With this understanding, we expect to see SIGNET as a valuable tool for integrative GWAS analysis, thereby boosting the preven- tion, diagnosis, and treatment of human inherited diseases and eventually facilitating precision medicine. 展开更多
关键词 GWAS tissue-specific gene networks Markov random field
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