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Urban landscape classification using Chinese advanced high-resolution satellite imagery and an object-oriented

Li-gang MA,Jin-song DENG,Huai YANG,Yang HONG,Ke WANG

《信息与电子工程前沿（英文）》 2015年第16卷第3期页码 238-248 doi: 10.1631/FITEE.1400083

摘要： The Chinese ZY-1 02C satellite is one of the most advanced high-resolution earth observation systems designed for terrestrial resource monitoring. Its capability for comprehensive landscape classification, especially in urban areas, has been under constant study. In view of the limited spectral resolution of the ZY-1 02C satellite (three bands), and the complexity and heterogeneity across urban environments, we attempt to test its performance of urban landscape classification by combining a multivariable model with an object-oriented approach. The multiple variables including spectral reflection, texture, spatial autocorrelation, impervious surface fraction, vegetation, and geometry indexes were first calculated and selected using forward stepwise linear discriminant analysis and applied in the following object-oriented classification process. Comprehensive accuracy assessment which adopts traditional error matrices with stratified random samples and polygon area consistency (PAC) indexes was then conducted to examine the real area agreement between a classified polygon and its references. Results indicated an overall classification accuracy of 92.63% and a kappa statistic of 0.9124. Furthermore, the proposed PAC index showed that more than 82% of all polygons were correctly classified. Misclassification occurred mostly between residential area and barren/farmland. The presented method and the Chinese ZY-1 02C satellite imagery are robust and effective for urban landscape classification.

关键词： ZY-1 02C satellite Classification Urban Multi-variable model

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中国的极轨气象卫星

孟执中

《中国工程科学》 2004年第6卷第10期页码 1-5

摘要：文章简要介绍了“风云一号”（FY-1）极轨气象卫星的发展概况和技术性能，星载十通道扫描辐射计和长寿命、高可靠极轨卫星平台取得的成功；重点介绍了中国新一代的极轨气象卫星&ldquo

关键词：极轨气象卫星 FY-1卫星 FY-3卫星

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Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

《环境科学与工程前沿（英文）》 2022年第16卷第8期 doi: 10.1007/s11783-022-1522-y

摘要：

• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.

关键词： Methanogens Biological Nitrogen Removal (BNR) Simultaneous Methammox C:N ratio

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Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

《化学科学与工程前沿（英文）》 2023年第17卷第6期页码 772-783 doi: 10.1007/s11705-022-2280-x

摘要： Development of a titanium silicalite-1 (TS-1) catalyst with good crystallinity and a four-coordinate Ti framework is critical for efficient catalytic oxidation reaction under mild conditions. Herein, a size-controlled TS-1 zeolite (TS-1#0.1ACh (acetylcholine)) was synthesized via steam-assisted crystallization by introducing acetylcholine as a crystal growth modifier in the preparation process, and TS-1#0.1ACh was also employed in epoxidations of different substrates containing C=C double bonds. The crystalline sizes of the as-synthesized TS-1#0.1ACh catalysts were controlled with the acetylcholine content, and characterization results showed that the particle sizes of highly crystalline TS-1#0.1ACh zeolite reached 3.0 μm with a good Ti framework. Throughout the synthetic process, the growth rate of the crystals was accelerated by electrostatic interactions between the connected hydroxyl groups of the acetylcholine modifier and the negatively charged skeleton of the pre-zeolites. Furthermore, the TS-1#0.1ACh catalyst demonstrated maximum catalytic activity, good selectivity and high stability during epoxidation of allyl chloride. Importantly, the TS-1#0.1ACh catalyst was also highly versatile and effective with different unsaturated substrates. These findings may provide novel, easily separable and large TS-1 catalysts for efficient and clean industrial epoxidations of C=C double bonds.

关键词： size-controlled TS-1 crystal modifier steam-assisted crystallization epoxidation

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基于半实物的S频段卫星测控仿真系统平台设计

杨永安,韩忠民,冯祖仁,李光明,张宏伟

《中国工程科学》 2004年第6卷第12期页码 85-90

摘要：

该仿真系统是为了满足Ｓ频段卫星测控演练的需要而提出的。根据航天测控系统和S频段测控设备的特点，明确了仿真系统的组成及功能，并对主要部分进行了详细的描述；确定了仿真系统运行工作模式、主要技术指标、接口之间关系；结合实际应用情况，通过与真星进行比对，证明通过建立半物理仿真数学模型，达到了在数据层上与真星具有等价性，并展望了未来发展方向。

关键词：系统仿真航天测控系统 S频段卫星

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基于最大密度的小型无人机电机速度估计与故障检测 Research Articles

SOUZA1,Moises C. BEZERRIL1,Mateus A. SILVA1,Frank C.BRITO1

《信息与电子工程前沿（英文）》 2021年第22卷第7期页码 1002-1009 doi: 10.1631/FITEE.2000149

摘要：介绍了基于混沌的最大密度信号分析技术在无刷直流电机分析中的应用。利用了从电流信号最大密度估计得出的相关系数。通过实验实现了无刷电机在试验台上的速度估计以及在小型无人机上的故障检测。实验结果表明，在97.8%的案例中可估计电机速度，在82.75%的分析案例中可检测故障。

关键词：无人机；速度识别；故障检测；混沌

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Association of SIPA1 545 C>T polymorphism with survival in Chinese women with metastatic breast cancer

null

《医学前沿（英文）》 2013年第7卷第1期页码 138-142 doi: 10.1007/s11684-013-0247-5

摘要：

It has been demonstrated that single nucleotide polymorphisms (SNPs) of SIPA1 (signal-induced proliferation associated gene 1) are associated with metastatic efficiency in both human and rodents. The purpose of this study was to determine whether SIPA1 545 C>T polymorphism was associated with overall survival in patients with metastatic breast cancer. In this study, SIPA1 545 C>T polymorphism was detected in 185 metastatic breast cancer patients using polymerase chain reaction-restriction fragment length polymorphism assay (PCR-RFLP). Survival curves for patients with SIPA1 545 C>T polymorphism was compared using the Kaplan-Meier method with log-rank tests. We found that SIPA1 545 C>T polymorphism was significantly associated with survival in 185 patients with metastatic breast cancer. Patients with SIPA1545 T/T genotype had a significantly worse overall survival (OS) than did patients with C/T or C/C genotype (50.0% vs. 62.9%, P = 0.042). Moreover, in multivariate analysis, as compared with the C/C or C/T genotype, the T/T genotype remained an independent unfavorable prognostic marker of OS in this cohort (hazard ratio [HR] = 2.16; 95% CI= 1.12–4.15; P = 0.022). Our findings indicate that metastatic breast cancer patients with SIPA1 545 T/T genotype have a poorer survival compared to patients with C/C or C/T genotype.

关键词： SIPA1 polymorphism metastatic breast cancer survival

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带有网络智能体的去中心化多智能体强化学习进展 Review Article

张凯清1,杨卓然2,Tamer BAŞAR1

《信息与电子工程前沿（英文）》 2021年第22卷第6期页码 802-814 doi: 10.1631/FITEE.1900661

摘要：多智能体强化学习长期以来一直是机器学习和控制领域的重要研究课题。最近在（单智能体）深度强化学习领域的进展重新唤醒了对多智能体强化学习的研究兴趣，尤其在理论分析方面。本文回顾这个大课题中的一个子领域：带有网络智能体的去中心化多智能体强化学习。在这一场景中，多个智能体在一个共同的环境中进行序贯决策，无需中心控制器的协调，且智能体被允许和它们在通信网络上的邻居交换信息。这样的一个模型在很多方向都有相关应用，包括机器人控制、无人车控制、移动传感器网络控制、智能电网，等等。本综述旨在覆盖和整理我们和其他科研人员在这一方向的相关工作。我们希望该综述能够激发更多研究热情，投入到这个激动人心却又充满挑战的领域。

关键词：强化学习；多智能体系统；网络系统；一致性优化；分布式优化；博弈论

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用于卫星跟踪的加载顺序馈电网络的宽带高增益北斗天线 Research Article

邓卓林1,田中玉1,段晨贺1,肖培1,刘柱2,李高升1

《信息与电子工程前沿（英文）》 2023年第24卷第10期页码 1471-1481 doi: 10.1631/FITEE.2200244

摘要：北斗三号卫星导航系统于2020年正式启用，为全球人民带来高性能服务的同时，导航系统也对北斗天线的设计提出更高要求。本文提出一种宽带圆极化高性能北斗天线。该天线通过四端口顺序馈电网络实现宽带圆极化辐射，馈电网络从1.05 GHz到1.80 GHz的相位不平衡度小于7°。制造的天线在整个全球导航卫星系统（GNSS）频带上的回波损耗大于13 dB，轴比< 3 dB，右旋圆极化增益（RHCP）在GNSS低频段大于4 dB，在高频段可达7.1 dB以上。本文天线尺寸为120 mm×120 mm×20 mm，即0.54λo×0.54λo×0.09λo，其中λo是中心频率波长。设计的天线连接到GNSS接收机上搜索到12颗北斗卫星，GNSS信号的信噪比( )大于30 dB。这种高性能天线将为人们提供高质量的定位服务。

关键词：北斗天线；宽带圆极化辐射；四端口顺序馈电网络；全球导航卫星系统（GNSS）接收机；卫星跟踪

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中巴测控卫星工程项目运筹学应用研究

杨天社,陈忠彬

《中国工程科学》 2002年第4卷第4期页码 79-82

摘要：

中国-巴西测控卫星工程项目是我国在高技术领域与巴西合作的一个工程项目，也是我国航天机构与国外航天机构在卫星测控领域的首次合作项目。该工程项目取得了圆满成功，为我国今后进行类似的国际合作积累了丰富的经验。建立了该工程项目管理中若干实际问题的运筹学模型，概述了运筹学的应用效果。

关键词：中国和巴西测控卫星工程项目运筹学应用

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一种基于业务需求与流量感知的卫星网络多路径路由算法 Research Article

邢紫阳1,2,祁晖1,2,底晓强1,2,3,刘晋尧1,2,许睿1,2,陈静1,2,从立钢1,2

《信息与电子工程前沿（英文）》 2023年第24卷第6期页码 844-858 doi: 10.1631/FITEE.2200507

摘要：随着低轨卫星制造和发射成本的降低，以及其覆盖范围大、数据传输速率高等优点，低轨卫星已成为空地网络数据传输的重要组成部分。但受地理位置及人们生活习惯等因素影响，用户对数据需求差异会造成网络流量不均衡，可能导致网络拥塞进而影响数据传输。传统卫星网络获取网络信息收敛慢，无法细粒度收集全局网络信息，不利于计算最优路由。多业务请求无法满足服务质量要求。本文将人工智能技术应用于低轨卫星网络，利用软件定义网络获取全局网络信息，感知网络流量，通过强化学习在线制定综合决策，实时更新最优路由策略。仿真结果表明，所提强化学习算法有良好收敛性和较强泛化能力。与传统路由相比，本文算法吞吐量提高了8%，且具有负载均衡性。

关键词：软件定义网络（SDN）；快速用户数据报协议互联网连接（QUIC）；强化学习；Sketch；多业务需求；卫星网络

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普列克底物蛋白同源物样结构域家族A成员1蛋白——导致代谢疾病的多方面细胞存活因素 Review

Tamana Yousof, Jae Hyun Byun, Jack Chen, Richard C. Austin

《工程（英文）》 2023年第20卷第1期页码 9-18 doi: 10.1016/j.eng.2022.05.014

摘要：

普列克底物蛋白同源物样结构域家族A成员1（PHLDA1）是多作用的胞内蛋白，属于进化上保守的普列克底物蛋白同源相关结构域家族。最初，PHLDA1的小鼠同源基因——T 细胞死亡相关51 基因（TDAG51）——因其在T细胞杂交瘤中活化诱导的细胞凋亡中的作用而被发现越来越多的证据也证实，PHLDA1在内质网应激信号通路中作为细胞凋亡、自噬和增殖的关键介质发挥作用。本文综述了PHLDA1基因及蛋白调控、定位和功能方面的现有知识。本文重点介绍了PHLDA1促凋亡和抗凋亡，进而导致代谢性疾病的作用。

关键词：内质网应激代谢凋亡细胞存活普列克底物蛋白同源物样结构域家族A成员1（PHLDA1）

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THE ANTHOCYANIN BIOSYNTHETIC REGULATOR MDMYB1 POSITIVELY REGULATES ASCORBIC ACID BIOSYNTHESIS IN APPLE

Jianping AN, Xiaofei WANG, Chunxiang YOU, Yujin HAO

《农业科学与工程前沿（英文）》页码 231-235 doi: 10.15302/J-FASE-2020367

摘要： Ascorbic acid (AsA, vitamin C) is involved in the regulation of many aspects of plant growth and development. It is an essential micronutrient for humans and can prevent scurvy, maintain the health of gums and blood vessels, reduce the level of plasma cholesterol and enhance the immune systen. Apple cultivars Orin and Guanghui were crossed to obtain a group of hybrid offspring with and without red flesh in the course of assessing apple germplasm resources. Unexpectedly, the red-flesh apples had higher AsA contents than other apples. Further studies showed that the anthocyanin biosynthetic regulator MdMYB1 directly activates the expression of dehydroascorbate reductase gene , thus promoting the activity of the DHAR enzyme and the accumulation of AsA. This finding reveals the mechanism leading to high AsA levels in red-flesh apples and suggests a new idea to cultivate red-flesh apples with high AsA contents and produce AsA efficiently and without pollution.

关键词： anthocyanin apples ascorbic acid MdMYB1 vitamin C

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Adsorption of 1,3-propanediol from synthetic mixture using polymeric resin as adsorbents

PRASITCHOKE, C. MUANGNAPOH

《化学科学与工程前沿（英文）》 2009年第3卷第1期页码 52-57 doi: 10.1007/s11705-009-0087-7

摘要： The aim of this work was to separate 1,3-PDO from a synthetic mixture using polymeric resins, Amberlite XAD-7 and XAD-16 resins. The equilibrium adsorption of 1,3-PDO onto two polymeric resins were investigated in binary and tertiary systems. Experimental results of binary component adsorption equilibrium indicated that the adsorption capacity ( ) of 1,3-PDO at 160 g/L onto XAD-7 and XAD-16 was 835.96 and 584.61 mg 1,3-PDO/g dry resin, respectively. The adsorption isotherms were closely predicted by the Langmuir-Freundlich model among the two isotherm model tested. The value of n of 1,3-PDO adsorbed on XAD-7 are much higher than those on XAD-16. This result suggested that XAD-7 resin has a higher affinity for the 1,3-PDO adsorption than XAD-16 resin. Moreover, the value of adsorption capacity of 1,3-PDO in the binary and tertiary component were compared at the same conditions. In the tertiary system, although the selectivity of 1,3-PDO from XAD-7 was approximately six times higher than XAD-16, the adsorption capacity of 1,3-PDO at 160 g/L onto XAD-16 was higher than XAD-7. Interestingly, the reusability of XAD-7 and XAD-16 resins in the three cycle times shows a slight loss of adsorption capacity. Furthermore, the investigation about desorption by an ethanol/water mixture at 50% ( / ) indicated that the desorption yield of 1,3-PDO from XAD-7 was lower than XAD-16 resin for both the binary and tertiary component. This was due to the more favorable adsorption characteristics of XAD-7 resin than XAD-16 resin.

关键词： adsorption 1 3-propanediol glycerol polymeric resin adsorption isotherm

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Expression and function of DMT1 without IRE in C6 cells mediated by recombinant adenovirus

Xixun DU*, Huamin XU*, Hong JIANG, Jun WANG, Lei WANG, Junxia XIE

《医学前沿（英文）》 2009年第3卷第1期页码 67-71 doi: 10.1007/s11684-009-0010-0

摘要： Divalent metal transporter 1 (DMT1) is a ferrous iron import protein. The improper expression of DMT1 is involved in neurodegenerative diseases. In the present study, we constructed a recombinant adenovirus containing the gene of DMT1 without the iron response element (DMT1-IRE) and investigated its expression and function in the C6 glioma cell line. The DMT1-IRE gene, obtained by RT-PCR, was cloned into the shuttle plasmid pAdTrack-CMV containing green fluorescent protein (GFP) reporter gene. Linearized plasmid pAdTrack-CMV-DMT1-IRE was subsequently co-transformed into ( ) BJ5183 cells along with an adenoviral backbone plasmid pAdEasy-1 after digestion with I. I-digested pAdEasy1-DMT1-IRE was then transfected into E1-transformed human embryonic kidney cells (HEK293 cells) , in which recombinant adenoviruses were generated within 7 to 10 days. The results demonstrated that we obtained the DMT1-IRE gene. pAdEasy1-DMT1-IRE yielded a large fragment, plus a smaller fragment of 4.5 kb after digestion with I. PCR confirmed pAdEasy1-DMT1-IRE contained gene DMT1-IRE, indicating the successful construction of recombinant adenovirus plasmid containing DMT1-IRE. GFP fluorescence further confirmed the generation of adenovirus. AdDMT1-IRE could efficiently infect C6 glioma cells. And cell viability decreased in Ad-DMT1-IRE infected cells after iron overload compared to the control. These results suggest that the over expressed DMT1-IRE can aggravate the iron induced cell death due to its iron influx function.

关键词： divalent metal transporter 1 recombinant adenovirus homologous recombination iron