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基于Lü系统的移动机器人完成特殊情况下全覆盖路径规划的参数值选择策略 Research Article

李彩虹1,刘聪1,宋勇2,梁振英1

《信息与电子工程前沿（英文）》 2023年第24卷第2期页码 231-244 doi: 10.1631/FITEE.2200211

摘要：针对移动机器人完成特殊情况下的全覆盖路径规划（complete coverage path planning, CCPP）任务，基于Lü系统，提出一种构造混沌机器人的系统参数值综合选择策略，以满足特殊任务下遍历轨迹高随机性和高覆盖率的需求首先利用混沌系统必为耗散系统的特点，大致确定Lü系统成为耗散系统的参数取值范围；然后计算耗散系统下的李雅普诺夫指数谱，缩小系统参数的取值范围；其次画出这些参数下的相平面，大致判断其轨迹的拓扑分布特性；进一步在好的参数取值里上述综合选择策略根据覆盖轨迹混沌性和随机性的要求，逐渐缩小了系统参数的取值范围。与使用一组固定的经典参数值的Lü系统相比，经过综合方法选择参数值的系统，能挑选出李雅普诺夫指数大的变量来构造混沌机器人，从而使覆盖轨迹的随机性能更高。另一个混沌Lorenz系统，用来测试和验证所设计策略的可行性和有效性。此类研究能够提高机器人完成特殊情况下CCPP任务的效率。

关键词：混沌移动机器人；Lü系统；全覆盖路径规划；参数值选择策略；李雅普诺夫指数；皮尔逊相关系数

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基于Agent的军用大型复杂系统建模与仿真

李宏刚,吕辉,刘兴堂

《中国工程科学》 2004年第6卷第8期页码 40-44

摘要：

大型复杂系统是21世纪的核心技术之一，而军用复杂系统是各发达国家优先考虑的发展对象。在此背景下，简述了Agent的组成和原理，并对Agent用于军用复杂系统的建模过程进行了深入细致的分析，给出了复杂系统仿真模型和仿真结果，对仿真结果进行了分析。

关键词：复杂系统 Agent 建模与仿真

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Comments on the special issue on forestry of

John L. INNES

《农业科学与工程前沿（英文）》 2017年第4卷第4期页码 502-503 doi: 10.15302/J-FASE-2017189

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适用于低轨微小卫星的大视场红外地球敏感器

王昊1,王志远1,王本冬1,金仲和1,John L. CRASSIDIS2

《信息与电子工程前沿（英文）》 2021年第22卷第2期页码 141-286 doi: 10.1631/FITEE.1900358

摘要：红外地球敏感器广泛应用于卫星姿态确定和控制系统中。静态红外地球敏感器的主要缺点是视场较小，其典型视场约为20°至30°，可能不适用于近地轨道的微型卫星。

关键词：红外地球敏感器；微小卫星；姿态确定系统

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我国电站仿真技术进展与建模理论研究

吕崇德,范永胜,蔡瑞忠

《中国工程科学》 1999年第1卷第1期页码 99-103

摘要：对我国电站仿真技术的发展过程与建模理论的研究进行了论述和分析，重点阐述了20年来火电机组仿真技术从科学研究到产业化和使我国火电仿真机数量上跃居世界第一位、质量上达到世界先进水平的进展过程，给出了我国电力仿真机的分布情况；综述了我国电站系统仿真的核心技术

关键词：系统仿真建模电力

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中尺度机器人群集设计创新：合作式城市传感和测绘场景下的应用 Special Feature on Intelligent Design

DHARMAWAN, Gim Song SOH, Shaohui FOONG, Roland BOUFFANAIS, Kristin L. WOOD

《信息与电子工程前沿（英文）》 2019年第20卷第12期 doi: 10.1631/FITEE.1900384

摘要：为实现快速、节能、分布式、自适应、具有鲁棒性和可伸缩的系统，中尺度机器人设计和开发需大量硬件、控制和行为创新。本文从4方面详述其设计和开发过程：（1）嵌入式平台的系谱学；（2）关键系统架构和功能布局；（3）研发和实施中尺度机器人系统的设计原则；（4）为中尺度机器人族群有效集体运作而开发的各种关键算法，及在城市传感和测绘领域的应用虽然在复杂机器人系统设计过程中不可避免采用一些临时方法，但本文主要关注成体系系统的设计过程以及组件设计集成。成体系系统的设计过程为该领域未来系统的开发提供了基础。

关键词：成体系系统设计；中尺度机器人；群集；城市传感

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PD-1/PD-L1 blockade in cervical cancer: current studies and perspectives

Yumeng Wang, Guiling Li

《医学前沿（英文）》 2019年第13卷第4期页码 438-450 doi: 10.1007/s11684-018-0674-4

摘要： Cervical cancer (CC) is the fourth most commonly diagnosed female malignancy and a leading cause of cancer-related mortality worldwide, especially in developing countries. Despite the use of advanced screening and preventive vaccines, more than half of all CC cases are diagnosed at advanced stages, when therapeutic options are extremely limited and side effects are severe. Given these circumstances, new and effective treatments are needed. In recent years, exciting progress has been made in immunotherapies, including the rapid development of immune checkpoint inhibitors. Checkpoint blockades targeting the PD-1/PD-L1 axis have achieved effective clinical responses with acceptable toxicity by suppressing tumor progression and improving survival in several tumor types. In this review, we summarize recent advances in our understanding of the PD-1/PD-L1 signaling pathway, including the expression patterns of PD-1/PD-L1 and potential PD-1/PD-L1-related therapeutic strategies for CC.

关键词： PD-1 PD-L1 immune checkpoint blockade antibody immunotherapy cervical cancer

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In memory of Perry L. McCarty, seminal founder of Environmental Biotechnology

《环境科学与工程前沿（英文）》 2023年第17卷第10期 doi: 10.1007/s11783-023-1730-0

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CAN总线时间触发机制的实现

吕伟杰,,刘鲁源,王毅新

《中国工程科学》 2005年第7卷第9期页码 40-43

摘要：以汽车引擎控制系统为例进行的实验结果表明，利用CAN总线时间触发机制不仅可以有效地管理消息的传输，而且提高了总线带宽利用率。

关键词：时间触发时间同步 CAN总线分布式控制系统

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Shear design of high strength concrete prestressed girders

Emad L. LABIB,Hemant B. DHONDE,Thomas T. C. HSU,Y. L. MO

《结构与土木工程前沿（英文）》 2014年第8卷第4期页码 373-387 doi: 10.1007/s11709-014-0087-7

摘要： Normal strength prestressed concrete I-girders are commonly used as the primary superstructure components in highway bridges. However, shear design guidelines for high strength PC girders are not available in the current structural codes. Recently, ten 7.62 m (25 feet) long girders made with high strength concrete were designed, cast, and tested at the University of Houston (UH) to study the ultimate shear strength and the shear concrete contribution ( ) as a function of concrete strength ( ). A simple semi-empirical set of equations was developed based on the test results to predict the ultimate shear strength of prestressed concrete I-girders. The UH-developed set of equations is a function of concrete strength ( ), web area ( ), shear span to effective depth ratio ( / ), and percentage of transverse steel ( ). The proposed UH-Method was found to accurately predict the ultimate shear strength of PC girders with concrete strength up to 117 MPa (17000 psi) ensuring satisfactory ductility. The UH-Method was found to be not as overly conservative as the ACI-318 (2011) code provisions, and also not to overestimate the ultimate shear strength of high strength PC girders as the AASHTO LRFD (2010) code provisions. Moreover, the proposed UH-Method was found fairly accurate and not exceedingly conservative in predicting the concrete contribution to shear for concrete strength up to 117 MPa (17000 psi).

关键词： shear design high strength concrete prestressed girders full-scale tests

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Deeply missing my career idol and role model ― Professor Perry L. McCarty

《环境科学与工程前沿（英文）》 2023年第17卷第9期 doi: 10.1007/s11783-023-1717-x

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Urban watershed management under rapid urbanization

Pengfei DU, Haifeng JIA, Shaw L. YU

《环境科学与工程前沿（英文）》 2012年第6卷第5期页码 595-595 doi: 10.1007/s11783-012-0452-5

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Recombinant aspartate aminotransferase-catalyzed synthesis of L-4-fluorophenylalanine

CHEN Meijuan, JIA Honghua, CHEN Yongsheng, JIANG Min, WEI Ping

《化学科学与工程前沿（英文）》 2008年第2卷第2期页码 220-223 doi: 10.1007/s11705-008-0041-0

摘要： L-4-Fluorophenylalanine (FPhe) was prepared from 4-fluorophenylpyruvate (FPPA) catalyzed by aspartate aminotransferase (Asp-AT) of the recombinant BL21-pET/aspC. After 12 h enzymatic reaction, the FPPA conversion was over 90% and the yield of FPhe could be above 85% under the following optimal conditions: 37°C, pH value range of 5.0–8.0, 5.5 mass ratio of cell to FPPA, 0.6% (w/v) of Tween 80, 7.08 g/L FPPA, and 1.6 of molar ratio of L-Asp to FPPA.

关键词： L-4-Fluorophenylalanine Asp-AT aspartate aminotransferase 4-fluorophenylpyruvate FPPA

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Effects of different doses of cadmium on secondary metabolites and gene expression in Artemisia annua L.

null

《医学前沿（英文）》 2017年第11卷第1期页码 137-146 doi: 10.1007/s11684-016-0486-3

摘要：

This study aims to elucidate the underlying molecular mechanisms of artemisinin accumulation induced by cadmium (Cd). The effects of different Cd concentrations (0, 20, 60, and 120 μmol/L) on the biosynthesis of Artemisia annua L. were examined. Intermediate and end products were quantified by HPLC-ESI-MS/MS analysis. The expression of key biosynthesis enzymes was also determined by qRT-PCR. The results showed that the application of treatment with 60 and 120 μmol/L Cd for 3 days significantly improved the biosynthesis of artemisinic acid, arteannuin B, and artemisinin. The concentrations of artemisinic acid, arteannuin B, and artemisinin in the 120 μmol/L Cd-treated group were 2.26, 102.08, and 33.63 times higher than those in the control group, respectively. The concentrations of arteannuin B and artemisinin in 60 μmol/L Cd-treated leaves were 61.10 and 26.40 times higher than those in the control group, respectively. The relative expression levels of HMGR, FPS, ADS, CYP71AV1, DBR2, ALDH1, and DXR were up-regulated in the 120 μmol/L Cd-treated group because of increased contents of artemisinic metabolites after 3 days of treatment. Hence, appropriate doses of Cd can increase the concentrations of artemisinic metabolites at a certain time point by up-regulating the relative expression levels of key enzyme genes involved in artemisinin biosynthesis.

关键词： Cd secondary metabolites gene expressions Artemisia annua L.

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Reactive extraction for preparation of hydrogen peroxide under pressure

CHENG Yongxi, LI Hongtao, WANG Li, LÜ Shuxiang

《化学科学与工程前沿（英文）》 2008年第2卷第3期页码 335-340 doi: 10.1007/s11705-008-0042-z

摘要： The preparation of hydrogen peroxide from anthrahydroquinone by reactive extraction was investigated. The integration process of oxidation of anthrahydroquinone by air and extraction of hydrogen peroxide from the organic phase with water was carried out in a sieve plate column under pressure. The conversion of anthrahydroquinone increased with increasing pressure resulting in an increase of hydrogen peroxide concentration in the aqueous phase. However, no change in extraction efficiency of hydrogen peroxide was observed. A mathematical model for gas-liquid-liquid reactive extraction was established. In the model, the effects of pressure and gas superficial velocity on reaction were considered. With increasing gas superficial velocity, the conversion of anthrahydroquinone increased, and the fraction of hydrogen peroxide extracted reached a plateau with a maximum of 72.94%. However, both the conversion of anthrahydroquinone and the fraction of hydrogen peroxide extracted decreased with increasing organic phase superficial velocity.

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标题作者时间类型操作

基于Lü系统的移动机器人完成特殊情况下全覆盖路径规划的参数值选择策略

李彩虹1,刘聪1,宋勇2,梁振英1

期刊论文

基于Agent的军用大型复杂系统建模与仿真

李宏刚,吕辉,刘兴堂

期刊论文

Comments on the special issue on forestry of

John L. INNES

期刊论文

适用于低轨微小卫星的大视场红外地球敏感器