检索结果-南通市图书馆

International Journal of Mining Science and Technology 2018年第6期28卷 1015-1020页

作者： Guilin Zhang shulei Song Weiqiao Yang Bo Zhang Jianqing Wang Key Laboratory of Coal Processing & Efficient Utilization Ministry of EducationChina University of Mining and Technology

Mercury emitted from direct combustion of high-mercury coal does great harm to the environment. To make good use of high-mercury coal, it is necessary to study the occurrence characteristics of mercury in coal and high-efficient methods of mercury removal. In this paper, high-mercury coal of Guizhou Province of China was taken as an object to study the nature of mercury in coal and the rule of mercury removal by dry preparation method. Mercury mainly distributes in the medium and high density fractions, and has a good affinity with silicon, aluminum, iron, titanium, potassium, calcium, zinc, sodium and magnesium. It exists in minerals formed by these elements and presents significant correlation with ash in coal. After the high-mercury coal is separated by air dense medium fluidized bed, mercury content of clean coal is reduced to 1/10 of raw coal, while mercury content of gangue is increased to 3 times that of raw coal. This indicates that mercury in raw coal is rejected greatly by ADMFB and enriched in highdensity fractions. The rates of ash removal and mercury removal decrease with the density and present a very high correlation.

关键词： Occurrence of mercury Affinity Air dense medium fluidized bed Correlation of mercury and ash removal Distribution rule of mercury

新型功能树脂CSR8030在航空斜交轮胎胎面胶中的应用

在线全文

学校读者我要写书评

暂无评论

轮胎工业 2024年第9期44卷 551-555页

作者：周宝珍王书磊邢涛山东玲珑橡胶科技有限公司山东烟台265505

研究新型功能树脂CSR8030在航空斜交轮胎胎面胶中的应用。结果表明,在胎面胶中加入新型功能树脂CSR8030,胶料的硫化特性变化不大,硫化胶的拉断伸长率增大,抗撕裂性能、抗崩花掉块性能及耐高温性能提高,生热和滚动阻力降低。

关键词：功能树脂航空斜交轮胎胎面胶物理性能耐高温性能生热

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

搅拌摩擦固相沉积增材制造研究现状

材料导报 2024年第9期38卷 162-177页

作者：王子健孙舒蕾肖寒冉旭东陈强黄树海赵耀邦周利黄永宪哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001 哈尔滨工业大学(威海)山东省特种焊接技术重点实验室山东威海264209 中国兵器工业第五九研究所重庆400039 上海航天精密机械研究所上海201600

基于搅拌摩擦焊与增材制造技术开发的搅拌摩擦固相沉积增材制造为金属增材制造提供了一种独特的固相加工路线,其具有适用材料范围广、构件综合性能良好、效率高、成本低等优点,在航空航天、武器装备等领域金属及金属基复材结构件制备方... 详细信息

基于搅拌摩擦焊与增材制造技术开发的搅拌摩擦固相沉积增材制造为金属增材制造提供了一种独特的固相加工路线,其具有适用材料范围广、构件综合性能良好、效率高、成本低等优点,在航空航天、武器装备等领域金属及金属基复材结构件制备方面具有广阔的应用潜力。鉴于搅拌摩擦固相沉积增材制造的独特优势,本文首先对搅拌摩擦固相沉积增材制造技术的基本原理、完全耦合的热变形过程以及沉积层宏观成形进行了简单介绍,之后对增材沉积层微观组织演变和力学性能进行了重点论述,大量研究表明搅拌摩擦固相沉积增材制造中独特固相成形可使增材构件产生类锻造态显微组织,该技术已被逐步应用于结构件制备、修复、涂层加工等领域中。最后对搅拌摩擦固相沉积增材制造技术进行了展望,指出该技术未来需在仿真模拟、制造工艺、技术优化、质量监测、复杂构件制备等领域中进一步研究和突破。

关键词：搅拌摩擦固相沉积增材制造材料热变形行为宏观成形微观组织演变力学性能

Monaco系统调强模式下Constrained、Pareto优化方式在宫颈癌调强放疗中的应用

在线全文

学校读者我要写书评

暂无评论

中华全科医学 2024年第1期22卷 14-17页

作者：张坤杨健牛书雷许新明沧州市人民医院精准放疗中心河北沧州061000

目的探索动态调强(DMLC)、容积旋转调强(VMAT)下Monaco系统中2种优化方式在宫颈癌中的应用效果。方法选取2020年1月—2022年12月于沧州市人民医院接受调强放疗40例宫颈癌患者,在IMRT、VMAT后,分析2种模式的影响。结果 Constrained模式... 详细信息

目的探索动态调强(DMLC)、容积旋转调强(VMAT)下Monaco系统中2种优化方式在宫颈癌中的应用效果。方法选取2020年1月—2022年12月于沧州市人民医院接受调强放疗40例宫颈癌患者,在IMRT、VMAT后,分析2种模式的影响。结果 Constrained模式中Dmean[(5 225.41±32.53)cGy vs.(5 205.84±32.99)cGy]、Dmax[(5 585.46±51.64)cGy vs.(5 635.99±62.12)cGy]、膀胱V20[(78.07±6.31)%vs.(85.68±9.42)%]、直肠V20[(87.58±6.14)%vs.(88.75±5.21)%]、直肠V40[(34.21±6.71)%vs.(37.77±5.41)%]、骨盆V20[(84.74±4.91)%vs.(82.18±4.78)%]、骨盆V30[(51.77±6.73)%vs.(54.73±6.02)%]、左股骨头V20[(42.16±8.40)%vs.(37.37±8.68)%]、右股骨头V30[(9.90±3.43)%vs.(12.32±4.46)%]剂量,差异均有统计学意义(P<0.05)。在DMLC强调下,Constrained模式的机器跳数低于Pareto模式(P<0.05),VMAT强调下,Pareto模式子野数低于Constrained模式(P<0.05),机器跳数高于Constrained模式(P<0.05)。结论 VMAT技术能够满足宫颈癌患者放疗需求,且Pareto模式对危及的器官保护更优。

关键词： Monaco系统宫颈癌容积旋转调强靶区优先模式

Energy-efficient task offloading, load balancing, and resource allocation in mobile edge computing enabled IoT networks

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2019年第2期62卷 243-245页

作者： shulei LI Daosen ZHAI Pengfei DU Ting HAN Tianyuan Ruixin Communication Technology Co.Ltd. School of Electronics and Information Northwestern Polytechnical University The 10th Institute of China Electronics Technology Group Corporation (CETC) The 504th Institute of China Space Technology

Dear editor,The constraints on energy supply for smart mobile devices (SMDs) have obstructed the development of IoT. Mobile edge computing (MEC)[1]is a promising way to overcome the abovementioned challenge, whereby MEC servers (MECSs)can provide computing capabilities to SMDs with superior computing capabilities and thus reduce the energy consumption (EC) for SMDs [1].

关键词： IoT SMD MEC and resource allocation in mobile edge computing enabled IoT networks load balancing Energy-efficient task offloading

CD24 aggravates acute liver injury in autoimmune hepatitis by promoting IFN-γ production by CD4^(+) T cells

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2018年第3期15卷 260-271页

作者： Chenhong Zheng shulei Yin Yang Yang Yizhi Yu Xiaohua Xie Department of Comprehensive Surgery Clinical Division of South BuildingChinese PLA General HospitalBeijing100853China National Key Laboratory of Medical Immunology and Institute of Immunology Second Military Medical UniversityShanghai200433China

The T-cell-mediated immune response is implicated in many clinical hepatic injuries, such as autoimmune hepatitis and acute virus hepatitis. CD24 is widely expressed by different immune cells and plays an important role in the pathogenesis of many autoimmune diseases. However, the role of CD24 in T-cell-mediated liver injury has not been elucidated until now. here we showed that CD24 deficiency protects mice from concanavalin A (ConA)-induced fulminant liver injury by reducing serum interferon-γ (IFN-γ) levels. CD24 expression by hepatic T cells was markedly increased following ConA challenge. Moreover, decreased IFN-γ production by hepatic CD4^(+) T cells in CD24-deficient mice was detected, which was correlated with downregulated phosphorylation of STAT1 in hepatic tissue. In vitro experiments also supported the conclusion that CD24 deficiency impaired IFN-γ production by CD4^(+) T cells following ConA, CD3/CD28 and phorbol myristate acetate/ionomycin stimulation. Our study suggests that CD24 deficiency confers hepatoprotection by decreasing CD4^(+) T-cell-dependent IFN-γ production in vivo, which suggests that CD24 might be a potential target molecule for reducing clinical hepatitis.

关键词： CD24 CD4^(+)T cells concanavalin A(ConA) heat-stable antigen hepatitis interferon-γ liver injury

高标准免管护新型材料淤地坝施工工艺关键参数试验研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国水土保持 2024年第1期 62-65页

作者：宋海印张书磊杨帆黄河勘测规划设计研究院有限公司河南郑州450003

高标准免管护新型材料淤地坝为解决淤地坝坝身过流技术难题提供了一种全新方案,但是对于现有施工工艺中关键施工参数对施工的影响研究仍处于探索阶段。基于陕西省某新型材料试验淤地坝项目,围绕高标准免管护新型材料淤地坝施工工艺中的... 详细信息

高标准免管护新型材料淤地坝为解决淤地坝坝身过流技术难题提供了一种全新方案,但是对于现有施工工艺中关键施工参数对施工的影响研究仍处于探索阶段。基于陕西省某新型材料试验淤地坝项目,围绕高标准免管护新型材料淤地坝施工工艺中的拌和、摊铺、碾压工序中的关键参数开展试验研究。试验结果表明:拌和时间对黄土固化剂混合料的均匀度有着显著影响,并存在最佳拌和时间阈值;静-振结合的碾压方式碾压效果优于静压和振压的碾压方式;最优黄土固化剂混合料摊铺厚度约为30 cm;在实际施工中应综合考虑质量、时间和成本等综合因素,从而合理选择碾压速度。

关键词：免管护淤地坝施工工艺关键参数试验

Functional membrane separators for next-generation high-energy rechargeable batteries

在线全文

学校读者我要写书评

暂无评论

National Science Review 2017年第6期4卷 917-933页

作者： Yuede Pan shulei Chou Hua Kun Liu Shi Xue Dou Institute for Superconducting and Electronic Materials University of Wollongong Zhuhai Coslight Battery Co. Ltd

The membrane separator is a key component in a liquid-electrolyte battery for electrically separating the cathode and the anode, meanwhile ensuring ionic transport between them. Besides these basic requirements, endowing the separator with specific beneficial functions is now being paid great attention because it provides an important alternative approach for the development of batteries, particularly next-generation high-energy rechargeable batteries. herein, functional separators are overviewed based on four key criteria of next-generation high-energy rechargeable batteries: stable,safe, smart and sustainable(4 S). That is, the applied membrane materials and the corresponding functioning mechanisms of the 4 S separators are reviewed. Functional separators with selective permeability have been applied to retard unwanted migration of the specific species(e.g. polysulfide anions in Li-S batteries) from one electrode to the other in order to achieve stable cycling operation. The covered battery types are Li-S, room-temperature Na-S, Li-organic, organic redox-flow(RF) and Li-air batteries. Safe, smart and sustainable separators are then described in sequence following the first criterion of stable cycling. In the final section, key challenges and potential opportunities in the development of 4 S separators are discussed.

关键词： functional 4S separators stable safe smart sustainable

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于专利分析的精确制导技术发展

国防科技 2024年第1期45卷 39-47页

作者：梁江海杨筱刘书雷吴集国防科技大学国防科技战略研究智库湖南长沙410073

精确制导技术领域是各主要国家装备技术发展关注的重点领域。以incoPat全球专利数据库和Derwent专利数据库收录的精确制导技术领域相关专利为数据源,综合采用专利情报挖掘、大数据分析、可视化分析等方法进行总体态势、主要国家和主要... 详细信息

精确制导技术领域是各主要国家装备技术发展关注的重点领域。以incoPat全球专利数据库和Derwent专利数据库收录的精确制导技术领域相关专利为数据源,综合采用专利情报挖掘、大数据分析、可视化分析等方法进行总体态势、主要国家和主要机构分析。从公开专利的研发角度展示精确制导技术领域的发展态势,识别精确制导技术领域的热点技术、核心技术,系统把握精确制导技术领域领先国家、竞争态势、优势力量、研发重点。对结果进行总结分析,为我国精确制导技术领域发展布局提供参考。

关键词：精确制导技术专利分析竞争态势

Explosive characteristics of nanometer and micrometer aluminum-powder

在线全文

学校读者我要写书评

暂无评论

Mining Science and Technology 2011年第5期21卷 661-666页

作者： Jiang Bingyou Lin Baiquan Shi shulei Zhu Chuanjie Li Wenxia Faculty of Safety Engineering China University of Mining ＆ Technology Xuzhou 221116 China State Key Laboratory of Coal Resources and Mine Safety China University of Mining ＆ Technology Xuzhou 221008 China School of Management Xuzhou Normal University Xuzhou 221009 China

The explosive characteristics of aluminum powder have great significance in preventing and controlling aluminum-dust explosion accidents, especially the nano-aluminum powder. The explosion characteristics of 100 nm and 75 μm aluminum powders were investigated by using a 20 L spherical explosion cavity and a horizontal pipe whose cross-section area is 80 mm × 80 mm and length is 8 m. The results show that the maximum explosion pressure and its rising rate of 100 nm aluminum powder gradually increase with increasing concentration of aluminum-powder at the beginning. When aluminum-powder concentration is I kg/m3, the maximum explosion pressure reaches its maximum, and then gradually decreases. While when the concentration is 1.25 kg/m3, the maximum rate of pressure rise obtains its maximum, and then decreases. After 100 nm aluminum powder is exploded in pipes, the peak overpressure of blast wave first decreases and then increases to the maximum at a distance of 298 cm from the ignition source, and then gradually decreases. The most violent concentration is about 0.4 kg/m3 which is lower than 0.8 kg/m3 of 75 μm aluminum powder, so 100 nm aluminum powders are more easily exploded. The change laws of maximum explosion pressure, maximum rate of pressure rise and blast-wave peak overpressure of 100 nm aluminum powders with concentration are similar to those of 75 ktm aluminum powders, but these values are much higher than 75 Bm aluminum powders under the same concentration, so the aluminum-powders explosion of 100 nm will produce more harms. In the process of production, storage and transportation of aluminum powder, some relevant preventive measures can be taken to reduce the loss caused by aluminum-dust explosion according to nano-aluminum dust.

关键词： Nano-aluminum powderExplosion pressureRate of pressure risePeak overpressure