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Symmetry and general symmetry groups of the coupled Kadomtsev-Petviashvili equation 被引量:1
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作者 王佳 李彪 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第6期2109-2114,共6页
In this paper, the Lie symmetry algebra of the coupled Kadomtsev-Petviashvili (cKP) equation is obtained by the classical Lie group method and this algebra is shown to have a Kac-Moody-Virasoro loop algebra structur... In this paper, the Lie symmetry algebra of the coupled Kadomtsev-Petviashvili (cKP) equation is obtained by the classical Lie group method and this algebra is shown to have a Kac-Moody-Virasoro loop algebra structure. Then the general symmetry groups of the cKP equation is also obtained by the symmetry group direct method which is proposed by Lou et alo From the general symmetry groups, the Lie symmetry group can be recovered and a group of discrete transformations can be derived simultaneously. Lastly, from a known simple solution of the cKP equation, we can easily obtain two new solutions by the general symmetry groups. 展开更多
关键词 SYMMETRY general symmetry groups coupled KP equation
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Inflammation and dry eye disease——where are we? 被引量:7
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作者 Srinivas K Rao Rishi Mohan +2 位作者 Nikhil Gokhale Himanshu Matalia Paras Mehta 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2022年第5期820-827,共8页
The presence of inflammation in dry eye disease(DED)results in increased patient symptomatology,ocular surface damage and worsening tear dysfunction.It also affects the health of meibomian glands and their secretions ... The presence of inflammation in dry eye disease(DED)results in increased patient symptomatology,ocular surface damage and worsening tear dysfunction.It also affects the health of meibomian glands and their secretions which further aggravates ocular surface disease.This article reviews current knowledge regarding ocular surface inflammation in DED and explores the relationships between the vicious cycles of DED,inflammation and meibomian gland dysfunction(MGD).The clinical evaluation of eyes with such changes,markers that identify the presence of inflammation on the ocular surface and current treatment options are discussed. 展开更多
关键词 dry eye disease INFLAMMATION meibomian gland dysfunction vicious cycle ocular surface disease
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IMMUNOLOGICAL DIAGNOSIS OF LIGHT CHAIN DISEASE ANALYSIS OF 11 CASES FOUND IN FUJIAN PROVINCE
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作者 邱文宣 吴国华 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 1993年第1期67-72,共6页
The present paper reports 11 cases of light chain disease (LCD) sequently found in several citles over Fujian province, Immunological classification of this group of LCD ww as follows: six of me cases belonged to type... The present paper reports 11 cases of light chain disease (LCD) sequently found in several citles over Fujian province, Immunological classification of this group of LCD ww as follows: six of me cases belonged to type λ, four of them were type κ, and another one was a double LCD. We found that LCD was common in Fujlan only next to multiple myeloma (MM) of IgG class and accounted for 20% of the total 55 MM cases found in recent yean.It to well known that In matt patients of LCD M protein or Bence Jones proteinemia (BJPemia) to not detectable by conventional electro-phoresis. Our studies show that by making serum protein along with urinary BJP electrophoresis on the same one gel plate the sltuation can be greatly Improved It not only favour* the recognition of smail and faint band or bands of free light chain in serum, but also provides a repid and sensitive way, i. e. , immunofixation, to directly detect urinary light chain on the gel plate Immediately after electrophresis has been run. 展开更多
关键词 Multiple myeloma Light chain disease Immunological diagnosis.
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IMMUNOHISTOCHEMICAL STUDY ON S100 PROTEIN-POSITIVE DENDRITIC CELLS IN PATIENTS WITH GASTRIC CARCINOMA
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作者 黄建 黄怀德 +2 位作者 彭清璧 朱志建 余心如 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 1990年第2期57-61,共5页
The density of dendritic cells (DC) and macro-phages (Mφ) in tissue specimens of gastric carcinoma (GC n=65) was investigated by ABC im-munohistochemical method using anti-S100 protein and anti-lysozyme antibodies, a... The density of dendritic cells (DC) and macro-phages (Mφ) in tissue specimens of gastric carcinoma (GC n=65) was investigated by ABC im-munohistochemical method using anti-S100 protein and anti-lysozyme antibodies, and was compared with that in gastric ulcer (GU n=19), chronic atrophic gastritis (CAG n=28) and normal gastric mucosa (NGM n=15). The mean density if DC (cells/mm2) in GC (15.0 was significantly higher than that in NGM (3.8) and GU (8.3), but was remarkably lower when compared to that in CAG (29.5) (P<0.01). Statistically significant difference in the population density of DC was observed between well- and poorly-differentiated GC (P<0.01). With their unique dendritic processes, DC were mainly concentrated within dense lymphoid infiltrates or in the T-area of reactive lymphoid follicles and were interspersed among the tumor cells. In contrast, Mφ were present around the necrotic foci and were rarely seen within the non-necrotic neoplastic tissues. These data suggest that DC, which differ in morphology, distribution, number and function form Mφ may be more directly involved in the host immune reaction against tumor by acting as antigen presenting cells. 展开更多
关键词 IMMUNOHISTOCHEMICAL STUDY ON S100 PROTEIN-POSITIVE DENDRITIC CELLS IN PATIENTS WITH GASTRIC CARCINOMA DC GC
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Extended Symmetry of Generalized Variable-Coefficient Kadomtsev-Petviashvili Equation
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作者 王佳 李彪 叶望川 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第4期698-702,共5页
In this paper, the extended symmetry of generalized variable-coefficient Kadomtsev-Petviashvili (vcKP)equation is investigated by the extended symmetry group method with symbolic computation. Then on the basis of thee... In this paper, the extended symmetry of generalized variable-coefficient Kadomtsev-Petviashvili (vcKP)equation is investigated by the extended symmetry group method with symbolic computation. Then on the basis of theextended symmetry, we can establish relation among some different kinds of vcKP equations. Thus the exact solutionsof these veKP equations can be constructed via the simple vcKP equations or constant-coefficient KP equations. 展开更多
关键词 KP方程 广义变系数 对称性 符号计算方法 精确解
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Kac-Moody-Virasoro Symmetry Algebra of (2+1)-Dimensional Dispersive Long-Wave Equation with Arbitrary Order Invariant
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作者 张焕萍 李彪 陈勇 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第3期450-454,共5页
By Lie symmetry method, the Lie point symmetries and its Kac-Moody-Virasoro (KMV) symmetry algebra of (2+1)-dimensional dispersive long-wave equation (DLWE) are obtained, and the finite transformation of DLWE is given... By Lie symmetry method, the Lie point symmetries and its Kac-Moody-Virasoro (KMV) symmetry algebra of (2+1)-dimensional dispersive long-wave equation (DLWE) are obtained, and the finite transformation of DLWE is given by symmetry group direct method, which can recover Lie point symmetries. Then KMV symmetry algebra of DLWE with arbitrary order invariant is also obtained. On basis of this algebra the group invariant solutions and similarity reductions are also derived. 展开更多
关键词 色散长波方程 对称代数 任意阶 对称方法 群不变解 点对称 对称性 对称群
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The Characteristic Relationship Between Oil Uptake and Moisture Content during the High Temperature Immersion Frying of Thin Potato Crisps 被引量:3
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作者 Christopher R.Southern 陈晓东 Mohammed M.Farid 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第6期818-821,共4页
Thin potato crisps (2mm) were fried at 170℃, 180℃ and 190℃ for various times from 10s to 180s inclusive. It was found that definite oil uptake, moisture loss trends exist during the frying process. No significant d... Thin potato crisps (2mm) were fried at 170℃, 180℃ and 190℃ for various times from 10s to 180s inclusive. It was found that definite oil uptake, moisture loss trends exist during the frying process. No significant difference in the oil uptake or moisture loss rates between flat-cut and ridge-cut crisps exists. Also found in this study was that an increased oil temperature promoted higher moisture loss rates. In turn, the higher moisture loss rates contributed to a higher oil uptake rate. It was found, based on the volumetric plots of oil content vs. water content, that the oil uptake rate was proportional to the moisture loss rate. As a result, it has been shown that there is a possibility of having a characteristic curve of oil uptake against moisture content. 展开更多
关键词 高温油炸 薄薯片 吸收率 水分流失 特性关系 干燥处理
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重钢4100mm宽厚板精轧机压下控制系统
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作者 向军 《自动化信息》 2009年第5期54-56,共3页
本文介绍了应用在中厚板轧机压下装置上的电气及液压自动控制系统。其中电动压下可实现自动位置控制(APC),采用两台西门子6SE70整流回馈装置的逆变器组成主从控制系统,主装置采用速度控制方式,从装置则接受主系统发出的转矩设定指... 本文介绍了应用在中厚板轧机压下装置上的电气及液压自动控制系统。其中电动压下可实现自动位置控制(APC),采用两台西门子6SE70整流回馈装置的逆变器组成主从控制系统,主装置采用速度控制方式,从装置则接受主系统发出的转矩设定指令而工作在转矩调节方式;液压压下使用自动辊缝控制(AGC)系统,实现厚度、位置及压力的自动控制,其主控制器为西门子的TDC。 展开更多
关键词 宽厚板 压下 主从控制 自动厚度(辊缝)控制 自动位置控制
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SVC在4200mm厚板的应用
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作者 陆远程 程庆红 《科技风》 2012年第6期91-92,共2页
本文结合SVC在宝钢4200mm厚板厂的应用,介绍了系统组成及基本原理,最后总结了SVC在实际应用中出现的一些问题及解决措施。
关键词 SVC 系统组成 基本原理 解决措施
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MM教育方式的传承、创新及发展
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作者 华志远 《中学数学杂志》 2022年第1期1-3,共3页
MM教育方式是指运用数学方法论的观点来指导数学教学,即应用数学的发展规律、数学的思想方法和数学中的发现、发明与创新的观点设计数学教学.MM实验开展至今已有30多年,数学课程几经改革,MM教育方式却依然令人关注,但再成功的教学范式,... MM教育方式是指运用数学方法论的观点来指导数学教学,即应用数学的发展规律、数学的思想方法和数学中的发现、发明与创新的观点设计数学教学.MM实验开展至今已有30多年,数学课程几经改革,MM教育方式却依然令人关注,但再成功的教学范式,都需要创新和发展,从培养学生能力和素养的视角重新审视MM教育方式,具有重要的现实意义和深远的历史意义. 展开更多
关键词 数学方法论 MM教育方式 MM实验传承 创新发展
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MM教育方式的源与流 被引量:2
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作者 华志远 《数学通报》 北大核心 2020年第8期32-35,共4页
2019年11月29日至30日,全国第12届数学方法论与数学教育学术研讨会,暨MM实验30周年纪念活动,在无锡隆重举行,来自全国各地的数学家、数学教育家、专家学者和教师云集无锡,研讨当前数学教育方法,展望未来发展之大计.
关键词 数学方法论 数学教育家 展望未来 MM教育方式 教育学术研讨会 源与流 数学家 无锡
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Targeting brain tumors with innovative nanocarriers:bridging the gap through the blood-brain barrier
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作者 KARAN WADHWA PAYAL CHAUHAN +7 位作者 SHOBHIT KUMAR RAKESH PAHWA RAVINDER VERMA RAJAT GOYAL GOVIND SINGH ARCHANA SHARMA NEHA RAO DEEPAK KAUSHIK 《Oncology Research》 SCIE 2024年第5期877-897,共21页
Background:Glioblastoma multiforme(GBM)is recognized as the most lethal and most highly invasive tumor.The high likelihood of treatment failure arises fromthe presence of the blood-brain barrier(BBB)and stemcells arou... Background:Glioblastoma multiforme(GBM)is recognized as the most lethal and most highly invasive tumor.The high likelihood of treatment failure arises fromthe presence of the blood-brain barrier(BBB)and stemcells around GBM,which avert the entry of chemotherapeutic drugs into the tumormass.Objective:Recently,several researchers have designed novel nanocarrier systems like liposomes,dendrimers,metallic nanoparticles,nanodiamonds,and nanorobot approaches,allowing drugs to infiltrate the BBB more efficiently,opening up innovative avenues to prevail over therapy problems and radiation therapy.Methods:Relevant literature for this manuscript has been collected from a comprehensive and systematic search of databases,for example,PubMed,Science Direct,Google Scholar,and others,using specific keyword combinations,including“glioblastoma,”“brain tumor,”“nanocarriers,”and several others.Conclusion:This review also provides deep insights into recent advancements in nanocarrier-based formulations and technologies for GBM management.Elucidation of various scientific advances in conjunction with encouraging findings concerning the future perspectives and challenges of nanocarriers for effective brain tumor management has also been discussed. 展开更多
关键词 GLIOBLASTOMA Brain tumor Blood-brain barrier Liposomes Metallic nanoparticles NANOCARRIERS
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邯钢2250mm热轧支撑辊使用技术 被引量:4
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作者 李华 周英超 +1 位作者 申海龙 宁国燕 《轧钢》 2018年第2期48-54,共7页
针对邯钢2 250mm热轧厂生产中支撑辊存在的在机剥落、辊型磨损严重、板形控制困难等问题,研究了支撑辊疲劳裂纹的产生机理,优化了辊型曲线,开发了疲劳裂纹检测技术、磨削量预测技术、支撑辊堆焊与检测技术,以及支撑辊使用评价体系。实... 针对邯钢2 250mm热轧厂生产中支撑辊存在的在机剥落、辊型磨损严重、板形控制困难等问题,研究了支撑辊疲劳裂纹的产生机理,优化了辊型曲线,开发了疲劳裂纹检测技术、磨削量预测技术、支撑辊堆焊与检测技术,以及支撑辊使用评价体系。实践表明:杜绝了疲劳裂纹引起支撑辊在机发生剥落、掉肩等轧辊失效事故;延长了支撑辊在机服役时间;减少了辊型在机磨损,支撑辊辊耗降低了0.03kg/t。 展开更多
关键词 热连轧 支撑辊 疲劳裂纹 辊型 磨削 堆焊
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邯钢2250热轧厂精轧换辊和标定时间的优化及改进
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作者 马冬凯 《制造业自动化》 北大核心 2023年第2期149-153,共5页
邯钢2250热轧厂生产线每天平均换辊7次,每次换辊用时18分钟,换辊时间占到了总停机时间的45%左右,严重影响生产的作业率,与国内同类型企业的差距较大,与我厂要求的高效化生产所矛盾。为了缩短精轧换辊时间,提高机时产量和日历作业率,通... 邯钢2250热轧厂生产线每天平均换辊7次,每次换辊用时18分钟,换辊时间占到了总停机时间的45%左右,严重影响生产的作业率,与国内同类型企业的差距较大,与我厂要求的高效化生产所矛盾。为了缩短精轧换辊时间,提高机时产量和日历作业率,通过对现场设备的改造和程序的优化,大大缩短了精轧换辊时间,由之前的18分钟缩短至13分钟,为热轧厂高效化生产提供了保障,大大提高了日历作业率。 展开更多
关键词 精轧机 换辊 标定 力控 换辊小车 标定程序
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废树脂锥形干燥装置的研制及性能验证
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作者 肖伟 姜婷婷 《中国科技期刊数据库 工业A》 2023年第4期34-38,共5页
针对目前核电站运行过程中产生的低、中放射性废树脂和活性炭,我们设计了一种放射性废树脂和活性炭锥形干燥器烘干处理装置,并采购了树脂和活性炭进行了带料试验,验证了锥形干燥器烘干处理装置的设备性能。结果表明,锥形干燥器烘干处理... 针对目前核电站运行过程中产生的低、中放射性废树脂和活性炭,我们设计了一种放射性废树脂和活性炭锥形干燥器烘干处理装置,并采购了树脂和活性炭进行了带料试验,验证了锥形干燥器烘干处理装置的设备性能。结果表明,锥形干燥器烘干处理装置运行平稳、安全,对树脂的蒸发速率可达到20L/h,干燥后的树脂、活性炭含水率低于3%,树脂的减容比约为2,活性炭几乎不减容,核级树脂分解产生的废气主要产物为氢气和甲烷。 展开更多
关键词 锥形干燥器 树脂 活性炭 蒸发速率 含水率 减容比 废气
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放射性浓缩液桶内干燥系统装备的研制及性能验证
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作者 姜婷婷 肖伟 《中国科技期刊数据库 工业A》 2023年第4期153-156,共4页
针对核设施运行过程中产生的低、中放射性浓缩液进行减容处理,自主研发了一种低、中放射性废液桶内干燥系统装备,并通过搭建试验台架,模拟核电站放射性废液试验验证该低、中放射性废液桶内干燥系统工的可行性和装备的性能。结果表明,该... 针对核设施运行过程中产生的低、中放射性浓缩液进行减容处理,自主研发了一种低、中放射性废液桶内干燥系统装备,并通过搭建试验台架,模拟核电站放射性废液试验验证该低、中放射性废液桶内干燥系统工的可行性和装备的性能。结果表明,该工艺装备各项性能指标优于现有技术,在防范放射性物质外溢的同时,采用冷凝水反冲洗即解决了工程运行时密封盖结垢的痛点,又减少了二次污染,达到辐射防护安全性和环境保护节能降耗的目的。 展开更多
关键词 放射性 浓缩液 干燥装备 蒸发速率 含水率 装桶率 减容比 去污因子
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常见非制冷红外探测器技术及应用分析
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作者 韩凤芹 《中文科技期刊数据库(全文版)工程技术》 2023年第4期37-39,共3页
随着设计和制造能力的不断提升,以及国内供应商的不断崛起,非制冷红外探测器芯片价格在不断降低,尤其是AI技术的兴起给红外探测器信号处理能力带来了翻天覆地的变化,非制冷红外探测器技术的应用不断的多元化。本文章由红外探测器的工作... 随着设计和制造能力的不断提升,以及国内供应商的不断崛起,非制冷红外探测器芯片价格在不断降低,尤其是AI技术的兴起给红外探测器信号处理能力带来了翻天覆地的变化,非制冷红外探测器技术的应用不断的多元化。本文章由红外探测器的工作原理入手,并进一步分析了热电堆型、二极管型、热敏电阻型、热释电型和热敏电容型五种非制冷探测器的技术特点及其优缺点,并对其应用领域做了简单的分析。 展开更多
关键词 非制冷探测器 热电堆型 二极管型 热敏电阻型 热释电型 热敏电容型
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Ka频段射频开关矩阵研究
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作者 谭开洪 《中国科技期刊数据库 工业A》 2023年第5期186-190,共5页
随着卫星数量以及通讯数据的大幅增加,为适应数传通讯高码速率的发展,需要在Ka频段展开数据通讯任务。同时需要多任务同时执行,为了更好的利用Ka频段的带宽对Ka频段带宽进行通道划分,增配变频通道。本文设计了一种工作于18GHz-22GHz的K... 随着卫星数量以及通讯数据的大幅增加,为适应数传通讯高码速率的发展,需要在Ka频段展开数据通讯任务。同时需要多任务同时执行,为了更好的利用Ka频段的带宽对Ka频段带宽进行通道划分,增配变频通道。本文设计了一种工作于18GHz-22GHz的Ka频段的射频开关矩阵,可以实现6X20的全交换,任意输入可以和任意输出选通,且任意输入可以有多路输出(切换时不能影响已有连接)。具有通道一致性高,通道之间高隔离度特性。 展开更多
关键词 KA频段 开关矩阵 全交换 一致性 高隔离
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SPS制备SiC/Cu复合材料的耐腐蚀性能探究
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作者 冯圣尧 晏亮 +2 位作者 邹德波 郭超 吕伟红 《中文科技期刊数据库(引文版)工程技术》 2023年第8期74-77,共4页
使用放电等离子烧结工艺,以纯铜(Cu)为基体,碳化硅(SiC)为增强相制备了SiC/Cu复合材料,采用盐雾腐蚀方法研究了SiC含量对SiC/Cu复合材料耐腐蚀性能的影响。采用SEM对复合材料的表面形貌进行观察,并使用显微硬度仪、旋转摩擦试验仪对其... 使用放电等离子烧结工艺,以纯铜(Cu)为基体,碳化硅(SiC)为增强相制备了SiC/Cu复合材料,采用盐雾腐蚀方法研究了SiC含量对SiC/Cu复合材料耐腐蚀性能的影响。采用SEM对复合材料的表面形貌进行观察,并使用显微硬度仪、旋转摩擦试验仪对其腐蚀前后的力学性能进行了测试。结果表明:SiC的加入能够提高样品的致密度,烧结制备的试样质量良好,平均致密度达到96.3%。SiC/Cu复合材料的耐腐蚀性随着SiC的添加呈现先增加后下降的趋势,SiC添加量为7%时腐蚀速率最低为6.310 g/m-2·h-1,相比于纯铜复合材料下降了51.4 %。此时硬度损失最低为2.8%,磨损量增加值最低为0.0107 mm3。盐雾腐蚀产物较为致密,与复合材料的结合良好,有效保护了复合材料表面,从而提高材料的耐腐蚀性能。 展开更多
关键词 SIC/CU复合材料 放电等离子烧结 磨损量 硬度 耐腐蚀
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阜新市海州露天矿北帮东部边坡稳定性调查研究
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作者 李思晋 尹亮亮 《中国科技期刊数据库 工业A》 2023年第6期44-47,共4页
针对海州露天矿北帮东部边坡,以现状问题入手,从地层构造、采掘和采空、稳定性计算等多方面,综合分析、验算和评价。一是通过收集、梳理、判别各时期历史地质资料,针对北帮东部各剖面弱层重新界定,修订主要断层和弱层等高线图,建立三维... 针对海州露天矿北帮东部边坡,以现状问题入手,从地层构造、采掘和采空、稳定性计算等多方面,综合分析、验算和评价。一是通过收集、梳理、判别各时期历史地质资料,针对北帮东部各剖面弱层重新界定,修订主要断层和弱层等高线图,建立三维地质模型。二是综合海州露天矿后期露天和井工采掘资料,对露天北帮边坡岩石完整性和地下采空进行补充,修订南北轴线剖面,采用极限平衡分析方法进行稳定性计算。三是查清现存地质灾害隐患根源,为下步综合治理和整合利用工作提供依据。 展开更多
关键词 海州矿 北帮东部 监测数据 极限平衡分析
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