检索结果-南通市图书馆

MATHEMATICAL MODEL FOR coNTINUOUS DETECTION OF CURRENT EFFICIENCY IN ALUMINUM PRODUCTION

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第4期8卷 152-156页

作者： Zeng Shuiping Institute of Fuzzy control, North china University of technology, beijing 100041, P. R. china Liu Yexiang and Mei Chi Department of Nonferrous Metallurgy, Central South University of technology, Changsha 410083, P. R. china

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍａｔｈｅｍａｔｉｃａｌｍｏｄｅｌｓｆｏｒｃａｌｃｕｌａｔｉｏｎｏｆｃｕｒｅｎｔｅｆｉｃｉｅｎｃｙｉｎａｌｕｍｉｎａｒｅｄｕｃｔｉｏｎｈａｖｅｂｅｎｒｅｐｏｒｔｅｄｂｙｍａｎｙｉｎｖｅｓ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍａｔｈｅｍａｔｉｃａｌｍｏｄｅｌｓｆｏｒｃａｌｃｕｌａｔｉｏｎｏｆｃｕｒｅｎｔｅｆｉｃｉｅｎｃｙｉｎａｌｕｍｉｎａｒｅｄｕｃｔｉｏｎｈａｖｅｂｅｎｒｅｐｏｒｔｅｄｂｙｍａｎｙｉｎｖｅｓｔｉｇａｔｏｒｓ，ｍｏｓｔｏｆｗｈ...

关键词： current efficiency mathematical model aluminium electrolysis

Airborne Target State Estimator

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 1996年第1期7卷 59-70页

作者： Hao Jiankang Zhang Minglian & Wen Chuanyuan (Faculty 305 of beijing University of Aeronautics & Astronautics beijing, 100083, P. R. china) Faculty 305 of beijing University of Aeronautics & Astronautics beijing 100083 P. R. China

A Target State Estimator (TSE) for airborne radar system is proposed in this paper. It is very important for fire control system to obtain accurate estimation of the maneuvering target and the TSE becomes a key link in the integrated Flight/Fire control (IFFC) system. By adopting the Cartesian coordinates and pseudomeasurements ,the result ed TSE has it s advantages in *** addition, by employing accurate range and range-rate redundant filter, the range direction estimations obtained in Cartesian filter are greatly improved. The TSE shows its satisfaCtory performance in the Monte Carlo simulation of the IFFC system.

关键词： Maneuvering target tracking Target state estimator Kalman filter Integrated flight/fire control.

SURFACE MODIFICATION OF POLYPROPYLENE MICROFIBRE BY PLASMA-INDUCED VAPOR GRAFTING WITH ACRYLIC ACID

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1999年第3期17卷 221-229页

作者： Hong-jun Liang Qiu-shi Sun Xiao-huai Hou Institute of Chemistry, Chinese Academy of Sciences, beijing, 100080, china Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China

The hydrophilicity, dyeing and antistatic ability of polypropylene microfibre (PPMF) were improved by plasma-induced vapor grafting with acrylic acid. The effects of plasma discharge time, power, liquid phase acrylic acid temperature and environmental temperature on grafting yield were investigated. The existence of grafted polyacrylic acid (PAA) was verified by ESCA and ATR FT-IR. The morphology of grafted PAA was directly observed by SEM. The wicking test shows that the hydrophilicity of modified PPMF is greatly enhanced. The dyeability test of modified PPMF was carried out using Dispersion Yellow. It was found that the dye uptake ratio is linear to the weight percent of grafting. The antistatic ability was indicated by specific resistance. The specific resistance of modified PPMF was reduced to 10(6) similar to 10(7) Ohm . cm, thus the antistatic ability was considerably improved.

关键词： polypropylene microfibre (PPMF) plasma-induced grafting dyeability antistatic ability hydrophilicity contact angle

Electrolytes in solid-state dye-sensitized nanocrystalline solar cells

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2006年第7期16卷 679-683页

作者： AN Hongli, XUE Bofei, LI Dongmei, MENG Qingbo and GUO Lin ( beijing National Laboratory for condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, beijing 100080, china Department of Material Science and Engineering, Bei Hang University, beijing 100083, china) [a]beijing National Laboratory for condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China [b]Department of Material Science and Engineering Bei Hang University Beijing China

In this paper, the structure and operating principle of the dye-sensitized nanocrystalline solar cells (DSSC) are dis- cussed. The electrolytes can be divided into three types: liquid electrolyte, quasi-solid electrolyte and solid electrolyte. Based on the relevant study of our group, we summarized mainly the research progress of the quasi-solid electrolyte and solid electrolyte in solid-state DSSC.

关键词： solar cells electrolytes solid-state dye-sensitized.

consolidation and properties of ultrafine binderless cemented carbide by spark plasma sintering

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2008年第3期27卷 320-323页

作者： LIU Xiangqing LIN Tao Shao Huiping GUO Zhimeng LUO Ji HAO Junjie School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Owing to the absence of metal binder, binderless cemented carbides have higher wear, corrosion, and oxidation resistance. WC-0.3VC- 0.5Cr3C2 powders with an average particle size of 200 nm and a little amount of active element were consolidated by spark plasma sintering. The sintered microstructure revealed that the average WC grain size was 0.24μm, which was almost consistent with the initial free powder. The results of XRD showed that W2C phase was formed. Nearly complete densification of ultrafine binderless cemented carbide was achieved by sintering at 1400℃ for 120 s under 50 MPa. The resulting hardness and the fracture toughness were 28.18 GPa and 6.05 MPa·m1/2, respectively.

关键词： cemented carbide binderless carbide ultrafme mechanical properties spark plasma sintering

在线全文

学校读者我要写书评

暂无评论

新建隧道施工对既有隧道的影响分析

铁道建筑技术 2011年第10期 44-48,79页

作者：于清浩中铁第五勘察设计院集团有限公司北京102600

大理至丽江高速公路龙翔隧道上跨广大铁路浴龙山隧道,与既有隧道衬砌最小净距为19.6 m。根据经验法,分析了新建隧道对既有隧道的影响。借助数值分析方法,分析了既有隧道受影响的规律,把握了影响分析的重点。根据经验及数值模拟结果,提... 详细信息

大理至丽江高速公路龙翔隧道上跨广大铁路浴龙山隧道,与既有隧道衬砌最小净距为19.6 m。根据经验法,分析了新建隧道对既有隧道的影响。借助数值分析方法,分析了既有隧道受影响的规律,把握了影响分析的重点。根据经验及数值模拟结果,提出既有隧道比较合理的变形预警值和容许值,既有隧道受影响的位置、范围及尺寸。

关键词：新建隧道既有隧道接近施工数值模拟变形预警值

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第17期45卷 1614-1616页

作者： LU Anhuai, CHEN Jie, SHI Junxian, LU Xiaoying, TANG Junli & GUO Min1. Departmenl of Geology, Peking University, beijing 100871, china 2. National Laboratory of Mineral and Rock Materials, china University of Geosciences, beijing 100083, china (e-mail: luanhuai Department of Geology Peking University Beijing China National Laboratory of Mineral and Rock Materials China University of Geosciences Beijing China

Cr(Ⅵ)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(Ⅵ) and precipitant to precipitate Cr(Ⅲ) simultaneously. The disposal products can be divided into three parts in the beakers, namely supernatant in the upper part, the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(Ⅵ)+Cr(Ⅲ) in the supernatant liquid is 0.06 mg/L, which is lower than 1.5 mg/L of the discharge standard of china and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)2 to precipitate Cr(Ⅲ) traditionally so as to avoid recontamination. In fact, sodium sulfite (Na2SO3) used in disposal of Cr(Ⅵ) was

关键词： natural pyrrhotite Cr(Ⅵ)-bearing wastewater reduction Cr(Ⅵ) precipitation Cr(Ⅲ) one-step disposal rational use of mineral resources.

LAMELLAR MICROSTRUCTURE IN DUPLEX Ti-Al-V INTERMETALLIC coMPOUND

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1992年第4期5卷 282-285页

作者： GAO Ying ZHU Jing CAI Qigong Central Iron and Steel Research Institute,Ministry of Metallurgical Industry,beijing,china Central Iron and Steel Research Inst Beijing China

The morphology and crystallographic orientation of(α_2+γ)lamellar structure in duplex Ti-47.5Al-2.5V intermetallic compound have been studied by means of TEM, microdiffraction as well as 180° and non-180° rotation twinning analysis.A possible atomic model of the interface was ***,approach was made to a mechanism on complex nucleation of α_2+γ two phases along α-Ti interface,and growth of α_2/γ/γ_1/α_2 or α_2/γ/α_2/γ as fundamental structural unit.

关键词： TiAl intermetallic compound lamellar structure rotation twinning analysis interface

Reconnoitering Simulation of Unmanned Aerial Vehicle CGF through Agent-Based Modeling

在线全文

学校读者我要写书评

暂无评论

Reconnoitering Simulation of Unmanned Aerial Vehicle CGF thr...