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嵌入式Internet控制系统的设计与分析

宗群,李然,王波

《中国工程科学》 2005年 第7卷 第5期   页码 53-56

摘要：

对嵌入式Internet控制系统设计的相关问题进行了研究，包括系统需求、系统结构、设计与实现方法等，在此基础上建立了具有嵌入式Internet节点的控制系统，实现了其在电梯远程监控系统（REMS）中的应用，通过测试证明可以很好的满足实际需要。

关键词： 嵌入式Internet控制系统     REMS     DS80C400     JAVA     TINI    

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Grafting of PEG400 onto the surface of LLDPE/SMA film

CHEN Gufeng, ZHANG Yi, XU Jiarui, ZHU Yafei

《化学科学与工程前沿（英文）》 2007年 第1卷 第2期   页码 128-131 doi: 10.1007/s11705-007-0024-6

摘要： Linear low-density polyethylene (LLDPE) was melt and blended with styrene-maleic anhydride copolymer (SMA). The blending films were then immersed in poly(ethylene glycol)400 (PEG400) at room temperature. The surface composition of the blend films was determined by Fourier transform infra-red spectroscopy coupled with a variable incidence angle attenuated total reflection accessory (ATR-FTIR). Results show that PEG400 can be grafted onto the surface of the films via esterification with SMA. The immersion of PEG promotes the enrichment of SMA onto the surface of the films. The water contact angle data show that grafting of PEG400 onto PE can greatly improve the hydrophilicity of the PE surface. These experiments show that surface functionalization of polyethylene films by blending SMA and then surface grafting of PEG is feasible, which suggest an effective and simple route for PE surface modification via blending and grafting.

关键词： hydrophilicity     temperature     effective     immersion     reflection accessory    

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MST-S型摩托车道路试验仪设计与研制

贾贵玺,徐伟,李洪凤,齐炜

《中国工程科学》 2005年 第7卷 第4期   页码 74-78

摘要： 型摩托车道路试验仪，该仪器运用光电传感原理，以AT89S52中央处理器为内核，通过在试验道路上设置光电反光器，在线检测出摩托车穿过此段距离的时间，计算出摩托车行驶中的各种参数，并存储于非挥发性时间管理储存芯片DS1642

关键词： AT89S52芯片     DS1642芯片     在线检测     光电隔离    

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新型400 km·h−1 级架空接触网监测技术

Chul Jin Cho, Young Park

《工程（英文）》 2016年 第2卷 第3期   页码 360-365 doi: 10.1016/J.ENG.2016.03.016

摘要：

近年来，高速铁路各项技术不断发展，列车运行速度从300 km•h–1 提高到400 km•h−1。本文介绍了由韩国研究者开发和论证的技术，即400 km•h−1 级集电性能评估方法。此外，本文还详细解释了基于视频图像的监测技术，其不需要直接接触供电系统的任何部件，这项技术被应用于检测以时速400 km 运行的高铁上架空接触网组件的稳定性。

关键词： 高速铁路     架空接触网     状态监测     基于图像处理的测量方式    

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工程项目管理中的人工神经网络方法及其应用

汪应洛,杨耀红

《中国工程科学》 2004年 第6卷 第7期   页码 26-33

摘要：

概括了神经网络在工程项目管理中的应用，包括风险预测评估、费用估计、绩效预测、项目组织有效性预测、工程事故诊断、索赔争议分析、投标决策、进度费用优化、资源平衡等，总结分析了应用中存在的问题，并对如何开展神经网络方法在我国项目管理中的应用，提出了一些意见和建议。

关键词： 工程项目管理     神经网络     预测     优化     决策支持    

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Valveless pumping using a two-stage impedance pump

C.-C. LEE, Y. A. ABAKR, K.-C. WOO

《机械工程前沿（英文）》 2013年 第8卷 第3期   页码 311-318 doi: 10.1007/s11465-013-0270-x

摘要：

Impedance pump is defined as a type of valveless pumping mechanism, where an elastic tube is joined with a tube of different impedance, a periodic asymmetrical compression on part of the elastic tube will produce a unidirectional flow. Numerical and experimental studies had been conducted in the past, but little experimental work was found to exploit the principle of multi-stage impedance pumping for fluid transportation. This paper concentrates on the fluid behavior for an open-loop two-stage system experimentally. The aim of this work is to have an insight on the deliverable head and pumping rate of an open-loop two-stage impedance pumping system. This paper generally investigates the effect of different parameters towards the generation of unidirectional flows and composite flow of two opposite directions. Results obtained are of significant values.

关键词： valveless pumping     open-loop     two-stage     unidirectional     composite    

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Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode observer

Abdelkarim AMMAR,Amor BOUREK,Abdelhamid BENAKCHA

《能源前沿（英文）》 2020年 第14卷 第4期   页码 836-849 doi: 10.1007/s11708-017-0444-z

摘要： This paper proposes a design of control and estimation strategy for induction motor based on the variable structure approach. It describes a coupling of sliding mode direct torque control (DTC) with sliding mode flux and speed observer. This algorithm uses direct torque control basics and the sliding mode approach. A robust electromagnetic torque and flux controllers are designed to overcome the conventional SVM-DTC drawbacks and to ensure fast response and full reference tracking with desired dynamic behavior and low ripple level. The sliding mode controller is used to generate reference voltages in stationary frame and give them to the controlled motor after modulation by a space vector modulation (SVM) inverter. The second aim of this paper is to design a sliding mode speed/flux observer which can improve the control performances by using a sensorless algorithm to get an accurate estimation, and consequently, increase the reliability of the system and decrease the cost of using sensors. The effectiveness of the whole composed control algorithm is investigated in different robustness tests with simulation using Matlab/Simulink and verified by real time experimental implementation based on dS pace 1104 board.

关键词： induction motor     direct torque control (DTC)     space vector modulation (SVM)     sliding mode control (SMC)     sliding mode observer (SMO)     dS1104    

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基于S3C2410的GPRS数据终端的设计

孙学用

《中国工程科学》 2007年 第9卷 第12期   页码 94-96

摘要： 提出了以S3C2410处理器为核心，以SIM100-E为GPRS通信模块,构建了一套嵌入式Internet数据终端的方案，对其硬件构成及工作流程进行了讨论，描述了其软件层次结构，并详细讲解了基于该平台的

关键词： GPRS；嵌入式Internet；S3C2410；SIM100-E    

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Bioinspired C/TiO

Jian LI, Likun GAO, Wentao GAN

《农业科学与工程前沿（英文）》 2017年 第4卷 第4期   页码 459-464 doi: 10.15302/J-FASE-2017178

摘要： butterfly wings were replicated by a sol-gel method and a calcination process, which could take advantage of the spatial features of the wing to enhance their photocatalytic properties. Hierarchical structures of -carbon-TiO (PP-C-TiO ) were confirmed by SEM observations. By applying the Brunauer-Emmett-Teller method, it was concluded that in the presence of wings the product shows higher surface area with respect to the pure TiO made in the absence of the wings. The higher specific surface area is also beneficial for the improvement of photocatalytic property. Furthermore, the conduction and valence bands of the PP-C-TiO are more negative than the corresponding bands of pure TiO , allowing the electrons to migrate from the valence band to the conduction band upon absorbing visible light. That is, the presence of C originating from wings in the PP-C-TiO could extend the photoresponsiveness to visible light. This strategy provides a simple method to fabricate a high-performance photocatalyst, which enables the simultaneous control of the morphology and carbon element doping.

关键词： bioinspired     butterfly wings     C/TiO2     photocatalyst     visible light    

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Antithrombin deficiency and decreased protein C activity in a young man with venous thromboembolism:

null

《医学前沿（英文）》 2018年 第12卷 第3期   页码 319-323 doi: 10.1007/s11684-017-0553-4

摘要：

Antithrombin and protein C are two crucial members in the anticoagulant system and play important roles in hemostasis. Mutations in and lead to deficiency or dysfunction of the two proteins, which could result in venous thromboembolism (VTE). Here, we report a Chinese 22-year-old young man who developed recurrent and serious VTE in cerebral veins, visceral veins, and deep veins of the lower extremity. Laboratory tests and direct sequencing of and were conducted for the patient and his family members. Coagulation tests revealed that the patient presented type I antithrombin deficiency combined with decreased protein C activity resulting from a small insertion mutation c.848_849insGATGT in and a short deletion variant c.572_574delAGA in . This combination of the two mutations was absent in 400 healthy subjects each from southern and northern China. Then, we summarized all the mutations of the and gene reported in the Chinese Han population. This study demonstrates that the combination of antithrombin deficiency and decreased protein C activity can result in severe VTE and that the coexistence of different genetic factors may increase the risk of VTE.

关键词： antithrombin deficiency     protein C activity     mutation     variant     venous thromboembolism     anticoagulants    

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Atomistic simulations of plasma catalytic processes

Erik C. Neyts

《化学科学与工程前沿（英文）》 2018年 第12卷 第1期   页码 145-154 doi: 10.1007/s11705-017-1674-7

摘要： There is currently a growing interest in the realisation and optimization of hybrid plasma/catalyst systems for a multitude of applications, ranging from nanotechnology to environmental chemistry. In spite of this interest, there is, however, a lack in fundamental understanding of the underlying processes in such systems. While a lot of experimental research is already being carried out to gain this understanding, only recently the first simulations have appeared in the literature. In this contribution, an overview is presented on atomic scale simulations of plasma catalytic processes as carried out in our group. In particular, this contribution focusses on plasma-assisted catalyzed carbon nanostructure growth, and plasma catalysis for greenhouse gas conversion. Attention is paid to what can routinely be done, and where challenges persist.

关键词： atomic scale simulation     plasma-catalyst    

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Elevated C-reactive protein levels predict worsening prognosis in Chinese patients with first-onset stroke

Jiangtao YAN, Rutai HUI, Daowen WANG

《医学前沿（英文）》 2009年 第3卷 第1期   页码 30-35 doi: 10.1007/s11684-009-0005-x

摘要： The role of high sensitivity C-reactive protein (hsCRP) in predicting prognosis after stroke in the Asian population has not been investigated. We hypothesized that elevated levels of hsCRP were associated with worsening prognosis after stroke in Chinese patients. Two hundred and ninety consecutive patients with first-onset stroke and 290 age- and gender-matched control subjects without any cerebrovascular disease were enrolled for study. Plasma hsCRP level was detected and subsequent vascular events and death were recorded in both groups over a 5-year period. Compared to control group, patients presenting with stroke had higher plasma hsCRP level (3.3 ± 3.8 1.3 ± 2.2 mg/L, < 0.01). Furthermore, in the group of patients with stroke, the mean plasma hsCRP level was higher in patients who developed subsequent vascular diseases or died as compared with the patients without further complications (4.4 ± 4.3 2.7 ± 3.3 mg/L, < 0.01). Compared to the lowest tertile of hsCRP level, the relative risk for vascular events or death in stroke patients was 2.91 in the highest tertile of hsCRP (95% CI, 1.54–5.50, = 0.001). This increase in relative risk for vascular events or death in stroke patients continued after adjustment for age, sex and other cardiovascular risk factors such as hypertension and diabetes ( : 2.771, 95% CI: 1.367–5.617, = 0.005). These findings indicate that increased hsCRP level is associated with worsening prognosis after stroke in Chinese patients and suggests that inflammation is correlated with stroke outcome.

关键词： C-reactive protein     inflammation     stroke    

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A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

《化学科学与工程前沿（英文）》 2020年 第14卷 第1期   页码 90-96 doi: 10.1007/s11705-019-1790-7

摘要： We describe the synthesis and evaluation of an azulene-based chemodosimeter for nitrite. The probe was found to undergo two distinct color changes upon introduction aqueous nitrite ion. A near-instant formation of a grey color provides a qualitative indication of the presence of nitrite, followed by the formation of a deep-yellow/orange color, the endpoint from which quantitative data can be derived. The azulene probe exhibits 1:1 stoichiometry of reaction with nitrite in water, and is selective for nitrite over other anions. The azulene probe was applied to determine nitrite content in cured meat, and compared with the British Standard testing procedure (Griess test). The value obtained from the azulene-based probe agreed closely with the standard test. Our procedure only requires the preparation of one standard solution, instead of the three required for the standard Griess test.

关键词： azulene     nitrite     diazoquinone    

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Comments on the special issue of

Neil C. TURNER

《农业科学与工程前沿（英文）》 2017年 第4卷 第2期   页码 254-255 doi: 10.15302/J-FASE-2017156

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Comments on the special issue on tropical crops of

Luiz J C B CARVALHO

《农业科学与工程前沿（英文）》 2016年 第3卷 第4期   页码 375-376 doi: 10.15302/J-FASE-2016129

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标题 作者 时间 类型 操作

嵌入式Internet控制系统的设计与分析

宗群,李然,王波

期刊论文

Grafting of PEG400 onto the surface of LLDPE/SMA film

CHEN Gufeng, ZHANG Yi, XU Jiarui, ZHU Yafei

期刊论文

MST-S型摩托车道路试验仪设计与研制

贾贵玺,徐伟,李洪凤,齐炜

期刊论文

新型400 km·h−1 级架空接触网监测技术

Chul Jin Cho, Young Park

期刊论文

工程项目管理中的人工神经网络方法及其应用

汪应洛,杨耀红

期刊论文

Valveless pumping using a two-stage impedance pump

C.-C. LEE, Y. A. ABAKR, K.-C. WOO

期刊论文

Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode observer

Abdelkarim AMMAR,Amor BOUREK,Abdelhamid BENAKCHA

期刊论文

基于S3C2410的GPRS数据终端的设计

孙学用

期刊论文

Bioinspired C/TiO

Jian LI, Likun GAO, Wentao GAN

期刊论文

Antithrombin deficiency and decreased protein C activity in a young man with venous thromboembolism:

null

期刊论文

Atomistic simulations of plasma catalytic processes

Erik C. Neyts

期刊论文

Elevated C-reactive protein levels predict worsening prognosis in Chinese patients with first-onset stroke

Jiangtao YAN, Rutai HUI, Daowen WANG

期刊论文

A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

期刊论文

Comments on the special issue of

Neil C. TURNER

期刊论文

Comments on the special issue on tropical crops of

Luiz J C B CARVALHO

期刊论文