摘要：为缓解城市拥堵情况,提出一种基于改进变色龙(Chameleon)算法的交通控制子区划分方法。综合考虑交叉口间距、交通车流量等因素影响,计算各相邻交叉口的流量关联度,构建相似性矩阵;引入密度峰值聚类算法改进变色龙算法,通过度量公式得到子区划分结果。选取义乌市某区域路网进行模型验证分析,结果表明该方法与常用的固定配时法及谱聚类法相比在平均排队长度上降低7.9%和6.2%,停车次数降低32.6%和16.5%,平均延误时间降低17.8%和11.9%,该划分方法能使城市路网子区划分合理,控制效果显著。

摘要：This paper proposes a design of passive cooling system for CPR1000 spent fuel pool(SFP). Our design can effectively manage the SFP temperature not to exceed80 C. Then the transient analysis of the CPR1000 SFP with designed passive cooling system is carried out in station blackout(SBO) accident by the best-estimate thermal-hydraulic system code RELAP5. The simulation results show that to maintain the temperature of CPR1000 SFP under 80 C, the numbers of the SFP and air cooling heat exchangers tubes are 6627 and 19 086, *** height difference between the bottom of the air cooling heat exchanger and the top of the SFP heat exchanger is3.8 m. The number of SFP heat exchanger tubes decreases as the height difference increases, while the number of the air cooling heat exchanger tubes increases. The transient analysis results show that after the SBO accident, a stable natural cooling circulation is established. The surface temperature of CPR1000 SFP increases continually until 80 C, which indicates that the design of the passive air cooling system for CPR1000 SFP is capable of removing the decay heat to maintain the temperature of the SFP around 80 C after losing the heat sink.

摘要：阐述了太赫兹技术成为6G无线接入关键技术所面临的挑战,详细介绍了解决传统太赫兹技术低谱效、高阻塞、非视距(NLOS)等瓶颈问题的技术方案,包括高谱效大带宽实时通信系统、近场自愈合抗阻塞、超表面非视距覆盖等技术试验的初步结果,以推进太赫兹技术向6G新高频无线接入技术的发展进程。

摘要：A series of novel derivatives of indirubin were synthesized and evaluated for their anti-proliferative activity against human cancer cell lines of SGC7901,A549,HL-60,SK-BR-3 and *** of the compounds displayed more potent activity than *** addition,the derivatives showed improved water solubility,which may be favorable to their pharmacokinetic performances.

摘要：Compared with traditional face-to-face teaching and traditional e-learning model,blended teaching,an innovative teaching method,has drawn teachers’and researchers’*** terms of teachers,especially language teachers at the tertiary level are encouraged to use this method for different learning experiences it *** much literature research has proved that blended teaching approach can improve students’learning efficiency and ***,there is a trend that blended teaching as an alternative approach to traditional classroom teaching should be adopted and ***,on the basis of the authors’personal teaching experiences,the following research questions are put forward:First,in the course of College English,are students in blended teaching approach more engaged in their learning than those in the traditional formats?Second,what are the perceptions of blended teaching approach among both language teachers and language learners?Third,can blended teaching approach really promote learners’autonomy?Bearing these questions in mind,the authors conducted a survey among language teachers and students in Inner Mongolia University of Technology(IMUT),and it comes to a conclusion that the blended teaching approach can help to improve learners’autonomy;however,not in a very positive and motivated *** underlying reasons for this finding are need investigating further.

摘要：This paper aims to address the problem of geometric state control of large-segment steel box girders in offshore hoisting during the construction of large-span bridges. First, the geometric state control indexes of a large-segment steel box girder are determined, such as the manufacturing parameters of the top and bottom slabs, the width of the annular joint, and the support position. Second, the geometric state equations and state transfer matrixes of large-segment steel box girders under different conditions are deduced by taking the mileage and elevation of control points as basic state variables. In application of the geometric state transfer method in the construction control of the Hong Kong-Zhuhai-Macao Bridge, the width of the annular joint and the position parameters for the support of the large-segment steel box girder are predicted precisely. Moreover, the manufacturing parameters of the top and bottom slabs of the steel box girders are calculated reliably. The measured values show that the width of the annular joint is basically the same with the difference of less than 2 mm, the eccentricity of bridge support is less than 20 mm, and the elevation error of the bridge deck is within-10 mm to +15 mm, which meets the construction accuracy. Using the geometric state transfer method, the rapid and accurate installation of the Hong Kong-Zhuhai-Macao Bridge has been realized, demonstrating that the precise control of the geometric state of a steel box girder with ectopic installation and multi-state transition can be realized by using the geometric state transfer method.

摘要：现有针对智能化露天煤矿建设的研究主要聚焦于智能化露天煤矿总体规划、基本架构、建设内容的完整性评价等方面,关于智能化露天煤矿建设完成后运行效果综合评价的研究很少。提出了露天煤矿智能化能力的概念,即矿山巨系统对内外部环境变化能够自主做出合理响应的综合能力,是评价露天煤矿智能化程度最重要的标志。基于能力成熟度模型,从功能完整性、功能活跃性、系统结构性、数据利用高效性4个维度建立了露天煤矿智能化能力成熟度评价模型。分析了影响露天煤矿智能化能力成熟度的主要因素,发现单纯追加投资、扩建系统不能保障智能化能力的成熟,通过科学的规划,尽量采用少的功能来实现智能化建设目标,智能化建设效益将更加显著。从智能化露天煤矿能力成熟度评价模型出发,提出了露天煤矿智能化建设应遵循的减法逻辑、生态逻辑、重构逻辑与自洽逻辑,并给出了未来露天煤矿智能化发展的总体目标——全面建成“001”模式智能化露天煤矿,即移动设备及固定岗位全无人值守(“0人员”)、场景生态全覆盖(“0盲区”)、业务管控一体化(“1大脑”)。

摘要：A digital accelerometer is developed by using a ring oscillator(RO)and a *** sensitive unit of the accelerometer is the metal-oxide semiconductor(MOS)ROs located on silicon *** on the piezoresistive effect of the MOS RO,the accelerometer transduces the acceleration into frequency *** syntonic frequency of the MOS RO changes in relation to many environmental elements,such as temperature,source voltage,and so *** mixer is an interior signal processor that improves the output signal characteristics,with the digital output signal representing the frequency *** the accelerometer is based on the piezoresistive effect of the MOS RO,the frequency characteristics of the MOS RO and its relationship with the acceleration are *** device has been fabricated using standard integrated circuits processing methods combined with the Micro-Electro-Mechanical Systems *** characteristics of the sample chip are in agreement with the theoretical *** accelerometer has a high sensitivity of 6.91 kHz/g,a low temperature coefficient,and a simple fabrication process.

摘要：Two-dimensional Fourier transform(2D FT) spectroscopy is an important technology that developed in recent decades and has many advantages over other ultrafast spectroscopy methods. Although 2D FT spectroscopy provides great opportunities for studying various complex systems, the experimental implementation and theoretical description of 2D FT spectroscopy measurement still face many challenges, which limits their wide ***, the 2D FT spectroscopy reaches maturity due to many new developments which greatly reduces the technical barrier in the experimental implementation of the 2D FT spectrometer. There have been several different approaches developed for the optical design of the 2D FT spectrometer, each with its own advantages and limitations. Thus, a procedure to help an experimentalist to build a 2D FT spectroscopy experimental apparatus is *** tutorial review is intending to provide an accessible introduction for a beginner to build a 2D FT spectrometer.

摘要：核级阀门现场使用可靠性水平与设计、制造等过程息息相关,通过可靠性鉴定与验收试验的产品通常具有较高的使用可靠性水平。因此,本文以核级阀门为研究对象,对核级阀门及其试验进行总结,并基于已开展的阀门可靠性鉴定试验进行故障率趋势分析和故障原因分析。结果表明,阀门可靠性鉴定试验大致可分为早期、中期、末期三个阶段,且试验早期的故障率最大,早期故障对试验的影响也最大。最后,基于分析结果和阀门可靠性鉴定试验现状,针对如何提升核级阀门质量与可靠性进行探讨,以达到降低现场使用故障率、提高现场使用可靠性的目标。本文成果可应用于核级阀门可靠性鉴定与验收试验方案设计。