检索结果-南通市图书馆

消费经济 2005年第6期21卷 54-57页

作者：丁元周树高暨南大学广东广州510632 广东技术师范学院广东广州510665

本文从各类支出比重、消费结构变动度等方面分析了广东农村居民消费结构的变化。同时,又运用ELES对广东农村居民的消费倾向和需求弹性进行了实证研究,结果表明可根据消费倾向变化、降价和提高居民收入来有效促进消费需求。

关键词：广东农村居民消费结构实证分析

Corrosion behavior of magnesium in aqueous sulfate-containing electrolytes

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第6期11卷 2125-2141页

作者： Ainaz A.Abildina Andrey P.Kurbatov Yeldana G.Bakhytzhan Raigul zh.Jumanova Akmaral M.Argimbayeva Khaisa Avchukir Gulmira S.Rakhymbay Center of Physical and Chemical Methods of Research and Analysis Al-Farabi Kazakh National University050012 Tole bi 96AAlmatyKazakhstan Satbayev university Satbayev 22Almaty 050013Kazakhstan Al-Farabi Kazakh National university Al-Farabi 71Almaty 050040Kazakhstan

Studies have been conducted on the corrosive behavior of magnesium in aqueous sulfate electrolytes(0.5 mol/L MgSO_(4);0.5 mol/L Na2SO_(4);0.5 mol/L MgSO_(4)+0.5 mol/L Na2SO_(4)).The composition structure and morphology of the surface of the samples were studied using scanning electron microscopy in combination with X-ray spectral *** results of the experiments showed the formation of a surface film inhomogeneous in its structure and composition with the main components Mg(Oh)_(2)and Mg *** increase in the exposure time of the electrode in solution led to the formation of microcracks on the main film caused by internal stress because of hydration of magnesium oxide produced during *** salt composition of the electrolyte determines the morphology and thickness of corrosion films due to differences in the solubility of the products formed during the hydrolysis of magnesium oxide and the kinetics of this *** the methods of scanning electron microscopy X-ray electron analysis gravimetry and voltammetry it has been established that at various stages of magnesium corrosion in different electrolytes the growth rates of corrosion films are determined by the kinetics of magnesium oxide formation its hydration and dissolution followed by crystallization in the form of a brucite phase of loose sediments on the surface.

关键词： Magnesium Corrosion Film Electrolyte Gravimetry Corrosion current

Fast magnetic energy dissipation in relativistic plasma induced by high order laser modes

在线全文

学校读者我要写书评

暂无评论

high Power Laser Science and Engineering 2016年第2期4卷 85-89页

作者： Y.J.Gu Q.Yu O.Klimo T.zh.Esirkepov S.V.Bulanov S.Weber G.Korn Institute of Physics of the ASCR Institute of Modern Physics Fudan University FNSPE Czech Technical University in Prague Kansai Photon Science Institute Japan Atomic Energy Agency

Fast magnetic field annihilation in a collisionless plasma is induced by using TEM(1,0) laser pulse. The magnetic quadrupole structure formation, expansion and annihilation stages are demonstrated with 2.5-dimensional particle-in-cell simulations. The magnetic field energy is converted to the electric field and accelerate the particles inside the annihilation plane. A bunch of high energy electrons moving backwards is detected in the current sheet. The strong displacement current is the dominant contribution which induces the longitudinal inductive electric field.

关键词： high order laser mode laser–plasma interaction magnetic annihilation

Manufacture of hTR Fuel Element

在线全文

学校读者我要写书评

暂无评论

high Technology Letters 1995年第1期1卷 87-90页

作者： Shijiang, X. Chunhe, T. zhichang, X. Junguo, zh. Xueliang, Q. Ende, L. Tsinghua univ Beijing China

The hTR Fuel Element R & D Program,set in 1987,aims to develop the manufacturetechnology of hTR fuel element and to produce the fuel element for the first core of our 10MW experimental *** the work on laboratory scale... 详细信息

关键词： high temperature reactor Coated fuel particles Spherical fuel element Irradiation qualification

在线全文

学校读者我要写书评

暂无评论

腮腺多形性腺瘤手术方式的选择

中华耳鼻咽喉头颈外科杂志 2005年第12期40卷 922-924页

作者：周梁李采张孝通复旦大学附属眼耳鼻喉科医院耳鼻咽喉头颈外科上海200031

目的探讨腮腺多形性腺瘤手术术式的选择。方法对复旦大学附属眼耳鼻喉科医院耳鼻咽喉头颈外科1996年1月—2003年12月手术的62例腮腺多形性腺瘤患者的病史进行回顾性分析并进行随访,分析内容包括病程、肿瘤大小、术式及切除范围、术后病... 详细信息

目的探讨腮腺多形性腺瘤手术术式的选择。方法对复旦大学附属眼耳鼻喉科医院耳鼻咽喉头颈外科1996年1月—2003年12月手术的62例腮腺多形性腺瘤患者的病史进行回顾性分析并进行随访,分析内容包括病程、肿瘤大小、术式及切除范围、术后病理、术后复发情况及并发症等。结果在60例肿瘤最大径小于4CM的患者中,44例行腮腺浅叶切除术、16例行腮腺部分浅叶切除+部分深叶切除术,另外2例肿瘤大于4CM的患者行腮腺全切除术。随访中所有患者术后均未发生肿瘤复发。术后病理检查示6例(10%)部分区域包膜不完整,28例(45%)细胞生长活跃,偶见核分裂象,部分区域包膜有浸润。2例(4·5%)行腮腺浅叶切除术的患者术后出现术侧暂时性面神经麻痹,16例行腮腺部分浅叶切除+部分深叶切除术的患者无1例发生面神经麻痹,经统计学检验,上述两组患者术后面神经麻痹发生率的差异无统计学意义(FIShER确切概率法,P=0·534)。8例(18%)行腮腺浅叶切除术的患者术后出现FREY综合征,2例(13%)行腮腺部分浅叶切除+部分深叶切除术的患者术后出现FREY综合征,经统计学检验,上述两组患者术后FREY综合征发生率的差异无统计学意义(校正卡方检验,P=0·896)。2例行腮腺全切除术的患者均出现FREY综合征,62例中FREY综合征的总发生率为19·3%(12/62)。结论对于肿瘤最大径小于4CM的腮腺多形性腺瘤,行腮腺部分浅叶切除+部分深叶切除术是安全的,既可取得与腮腺浅叶切除术相同的疗效,又可减少术后面神经麻痹和FREY综合征的发生率。

关键词：腮腺肿瘤腺瘤多形性外科手术

在线全文

学校读者我要写书评

暂无评论

论城镇居民休闲消费力的培育

消费经济 2006年第1期22卷 57-60,64页

作者：李永周魏静武汉科技大学管理学院武汉430081

全面小康社会是基于经济发展基础之上的经济、社会和人全面发展的发展新阶段。基于人类发展和享受等高层次需要的休闲消费的实现,是评价和衡量城镇居民全面小康水平的重要标志。本文运用制度分析的方法阐述了全面建设小康社会时期发展... 详细信息

全面小康社会是基于经济发展基础之上的经济、社会和人全面发展的发展新阶段。基于人类发展和享受等高层次需要的休闲消费的实现,是评价和衡量城镇居民全面小康水平的重要标志。本文运用制度分析的方法阐述了全面建设小康社会时期发展休闲经济的战略意义,提出培育城镇居民休闲消费力的战略措施。

关键词：休闲经济全面小康社会休闲消费力

Preconditions for diversification development process in industry production

在线全文

学校读者我要写书评

暂无评论

Preconditions for diversification development process in ind...

Carbon for Reliable Lithium-Sulfur Batteries

作者： A.zh.Kaishanova S.Toraighyrov Pavlodar State university(PSu) 140000 PavlodarKazakhstan

Processes that are in today’s economics lead all enterprises to the feeling of fear of production and technology out of date,market richness customer’s changes in buying habits and prefers,social economical *** processes are globalization competition toughening,dynamic development, difficulty and uncertainty of outer surroundings.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Carbon for Reliable Lithium-Sulfur Batteries

中国化学会2019能源材料和缺陷化学研讨会

作者： RP Fang GJ hu zh Sun h-M Cheng F Li Institute of Metal Research Chinese Academy of Sciences

Lithium-sulfur（Li-S） batteries have attracted tremendous interest because of their high theoretical energy density and cost effectiveness.1, 2 The object of Li-S battery research is to produce batteries with more high energy density that at least outperforms state-of-the-art lithium-ion batteries. however, due to an intrinsic gap between fundamental research and practical applications, the outstanding electrochemical results obtained in most Li-S battery studies indeed correspond to low useful energy densities and are not really suitable for practical requirements.3 The Li-S battery is a complex device and its useful energy density is determined by several key parameters, most of which are often ignored, leading to the failure to meet commercial requirements.4 The purpose of this talk is to discuss how to pave the way for a reliable Li-S battery. From the perspective of fundamental research, high sulfur contents, high areal sulfur loadings and low electrolyte-to-sulfur ratios are essential requirements for achieving high practical energy density of a Li-S device. Possible solutions and some concerns regarding the optimization of these parameters are comprehensively discussed. Besides, problems related to a lithium metal anode in the Li-S system remain a great challenge and further developments are needed for the stabilization and protection of the anode. Finally, the future directions and prospects in Li-S battery field are considered.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

大红山铁矿林草植被水土保持效益的研究

福建林业科技 2007年第3期34卷 73-76页

作者：徐清艳周跃闽江学院化学与化学工程系福建福州350108 昆明理工大学环境科学与工程学院云南昆明650093

以裸地为对照,分别对土壤物理性状及土壤的渗透性,土壤中含水量的动态变化,地表径流及土壤流失量等进行了定点定量观测。研究结果表明,林地与草地能有效改善土壤物理性状、增强土壤渗透性和降低土壤水分含量;能通过提高土壤抗蚀性、改... 详细信息

以裸地为对照,分别对土壤物理性状及土壤的渗透性,土壤中含水量的动态变化,地表径流及土壤流失量等进行了定点定量观测。研究结果表明,林地与草地能有效改善土壤物理性状、增强土壤渗透性和降低土壤水分含量;能通过提高土壤抗蚀性、改善土壤养分含量来充分发挥水土保持效益。研究结果还表明,林地和草地减少侵蚀效益较好,裸地的土壤流失最严重。与裸地相比,林地和草地对地表径流的控制率达到63%～89%,对土壤流失的控制率达到69%～94%。

关键词：矿区植被侵蚀控制水土保持大红山铁矿

用细胞筛选噬菌体抗体库分离自然杀伤细胞抑制受体的单链抗体

在线全文

学校读者我要写书评

暂无评论

中国病理生理杂志 1998年第5期14卷 500-503页

作者：乔旭刚 unch.,zh 暨南大学医学院血液病研究室

目的与方法：用Ｎｉｓｉｍ等噬菌体抗体库经细胞筛选，分离自然杀伤细胞抑制受体（ＮＫＡＴ１）的单链抗体。结果：８次筛选循环后，分离到的单链抗体不但可以特异性识别到表达在细胞表面的ＮＫＡＴ１分子，而且也能与纯化的ＮＫＡＴ１... 详细信息

目的与方法：用Ｎｉｓｉｍ等噬菌体抗体库经细胞筛选，分离自然杀伤细胞抑制受体（ＮＫＡＴ１）的单链抗体。结果：８次筛选循环后，分离到的单链抗体不但可以特异性识别到表达在细胞表面的ＮＫＡＴ１分子，而且也能与纯化的ＮＫＡＴ１蛋白结合，这些单链抗体为３１ｋＤａ的分子。结论：用噬菌体抗体库可以简便。

关键词：杀伤细胞抗体流式细胞术自然杀伤 ScFv