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journal of Environmental Sciences 2015年第7期27卷 78-87页

作者： Wei Wu Tengteng Duan Hailiang Song Yan Li ang Yu Long Zhang Aimin Li State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University j.angsu Key Lab of Environmental Engineering Jiangsu Provincial Academy of Environmental Science School of Energy and Environment Southeast University

A two-phase anaerobic reactor fed with glucose substrate（3 g chemical oxygen demand（COD）/L） was used to investigate the effects of toxic metals on the degradation of organics and the soluble microbial product（SMP） formation. Low concentrations of Ni（II）（5 and10 mg/L） promoted the acid phase, whereas high concentrations（15, 20, and 25 mg/L）exhibited an inhibitory effect on, but did not alter the fermentative method, which mainly involved the fermentation of propionic acid. The methanogenic microorganism exhibited a strong capability adapting constantly increased Ni（II） levels. The acid phase was an accumulation stage of SMP. In the absence of Ni（II）, the high-molecular-weight material in the effluent SMP mainly contained polysaccharide, tryptophan, and casein. Methanogens metabolized most of the polysaccharide, the whole tryptophan content, and part of the casein, leading to the presence of humic acid and protein in effluent. After Ni（II） dosage, the protein and polysaccharide of the acid phase increased, and tryptophan changed, while casein remained stable. More protein than polysaccharide was produced, suggesting the prominent function of protein when addressing the negative effect of toxic metals. The analysis of DNA confirmed the change of bacterial activity.

关键词： Soluble microbial products (SMP) Two-phase anaerobic reactor Upflow anaerobic sludge bed (UASB) Ni(II)

joint frequency offset tracking and PAPR reduction algorithm in OFDM systems

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journal of Systems Engineering and Electronics 2010年第4期21卷 557-561页

作者： Lijun Ge Yingxin Zhao Hong Wu Ning Xu Yu'ang jin Wenqi Li College of Information Technical Science Nankai University Tianjin 300071 E R. China

This paper presents an algorithm that aims to reduce the peak-to-average power ratio（PAPR） of orthogonal frequency division multiplexing（OFDM） communication systems while maintaining frequency *** algorithm achieves PAPR reduction by applying the complex conjugates of the data symbol obtained from the frequency domain to cancel the phase of the data symbol.A likelihood estimator is used to obtain the sub-carrier phase error due to the residual carrier frequency offset（RCFO） using the same complex conjugates as a pilot ***,a joint time and frequency domain multicarrier phase locked loop（MPLL） is developed to compensate additional frequency *** results show that this algorithm is capable of reducing PAPR without impacting the frequency tracking performance.

关键词： orthogonal frequency division multiplexing(OFDM) peak-to-average power ration(PAPR) carrier frequency offset complex conjugate multicarrier phase locked loop(MPLL) phase error.

A one-pot protocol for copper-mediated azide–alkyne cycloaddition using alkenyl triflate precursors

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Chinese Chemical Letters 2019年第1期30卷 269-270页

作者： Yu Chen Lianchao Liu Dimin Wu Yu-Peng He ang Li College of Chemistry Chemical Engineering and Environmental Engineering Liaoning Shihua University State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic ChemistryChinese Academy of Sciences

On the basis of the mild transformation of alkenyl triflates into alkynes promoted by LiCl, a one-pot protocol using alkenyl triflate precursors was developed for copper-mediated azide–alkyne cycloaddition. This protocol may provide an opportunity of sequentially click reactions for the construction of bifunctional probes in chemical biology studies.

关键词： Click chemistry Azide-alkyne cycloaddition Alkenyl triflates Lithium chloride

面向超高频植入式RFID芯片的温度传感器研制

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集成电路与嵌入式系统 2025年第1期25卷 47-55页

作者：王俊杰肖宛昂吴静珠北京工商大学计算机与人工智能学院北京100048 中国科学院半导体研究所人工智能与高速电路实验室北京100083 中国科学院大学集成电路学院北京100049

基于0.18μm工艺设计并实现了一款用于超高频植入式RFID芯片的温度传感器。该温度传感器将MOS管作为感温元件,采用基于亚阈值MOS管的低功耗感温核心。传感器利用PTAT和CTAT两种电压延时器构成脉宽产生电路,从而生成脉宽信号,并与时间数... 详细信息

基于0.18μm工艺设计并实现了一款用于超高频植入式RFID芯片的温度传感器。该温度传感器将MOS管作为感温元件,采用基于亚阈值MOS管的低功耗感温核心。传感器利用PTAT和CTAT两种电压延时器构成脉宽产生电路,从而生成脉宽信号,并与时间数字转换器(TDC)一起构成温度量化电路。核心电路的版图面积为298μm×261μm,测温范围为35~45℃。流片测试结果表明,三颗芯片在两点校准后的测温最大误差为±0.4℃,关键温区的最大误差为±0.2℃,实测功耗为623 nW。基于流片实测结果,发现了当前芯片的局限性,并提出了未来芯片结构的改进方向。

关键词： RFID芯片温度传感器 TDC 亚阈值

Refining constitutive relation by integration of finite element simulations and Gleeble experiments

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journal of Materials Science & Technology 2019年第6期35卷 1039-1043页

作者： D.j. Yu D.S. Xu H. W ang Z.B. Zhao G.Z. Wei R. Yang College of Sciences Northeastern University Shenyang 110004 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Thermo-mechanical coupled finite element calculations were carried out to simulate the Gleeble compression of the samples of a titanium alloy(Ti60), and the results are analyzed and compared with the actual compression tests conducted on a Gleeble 3800 thermo-mechanical simulator. The changes in temperature, stress and strain distribution in the samples and the source of error on the constitutive relations from Gleeble hot compression test were analyzed in detail. Both simulations and experiments showed that the temperature distribution in the specimen is not uniform during hot compression, resulting in significant deformation inhomogeneity and non-ignorable error in the flow stress strain relation,invalidating the uniform strain assumption commonly assumed when extracting the constitutive relation from Gleeble tests. Based on the finite element simulations with iterative corrections, we propose a scheme to refine the constitutive relations from Gleeble tests.

关键词： Titanium alloy Constitutive relation Finite element Compression Temperature distribution

A geographic routing protocol based on trunk line in VANETs

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Digital Communications and Networks 2021年第4期7卷 479-491页

作者： Chen Chen Huan Li Xi’ang Li jianlong Zhang Hong Wei Hao Wang State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an710071China Key Laboratory of Industrial Internet of Things&Networked ControlMinistry of Education Chongqing400065China Shanxi Key Laboratory of Integrate and Intelligent Navigation Xi’an710071China China Highway Engineering Consulting Group Co.LTD. Beijing101400China Xi’an United Ride Intelligent Technology Co.LTD. Xi’an710071China

A Trunk Line Based Geographic Routing(TLBGR)protocol in Vehicular Ad-hoc Networks(VANETs)is proposed in this paper to solve the problem of data acquisition in the traditional trunk coordinated control *** of the characteristics of short communication time and high packet loss among vehicles,the vehicles entering the trunk lines can not transmit their information to the trunk coordinated control system *** resolve this problem,the proposed protocol uses the trunk lines’traffic flow and the surrounding road network to provide a real-time data transmission routing *** takes into account the data congestion problem caused by the large traffic flow of the main roads,which leads to the corresponding increase of the information flow of the section and the package loss,and the link partition problem caused by the insufficient traffic flow,which makes the vehicles have to carry and relay information thus increasing the transmission *** proposed TLBGR protocol can be divided into two stages:the next-intersection selection,and the next-hop selection in the chosen path between the current and next *** results show that,compared with other IoT routing protocols including Greedy Perimeter Stateless Routing(GPSR),Ad-hoc On Demand Vector(AODV),and Q-AODV,the TLBGR protocol has better performance in aspects of end-to-end delay,delivery rate,and routing cost under the scenario of urban traffic trunk *** TLBGR protocol can effectively avoid data congestion and local optimum problems,increase the delivery rate of data packets,and is therefore suitable for the routing requirements in this application scenario.

关键词： VANETs AHP Data transmission routing scheme volume

Applying multi-criteria analysis to select the most appropriate broiler rearing environment

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Information Processing in Agriculture 2021年第2期8卷 205-218页

作者： Karla A.O.Lima Irenilza A.Nääs Daniella j.Moura Rodrigo G.Garcia angélica S.Mendes College of Agricultural Engineering The State University of CampinasAve.Cândido Rondon501Barão Geraldo13083-875 CampinasSPBrazil College of Agrarian Sciences The Federal University of Grande DouradosRod Dourados-Itahumkm 1279804-970 DouradosMSBrazil College of Animal Sciences The Technological Federal University of ParanáRod Boa Esperançakm 0485660-000 Dois VizinhosPRBrazil

The present study aimed to assess the most appropriate rearing system for broiler housing in tropical regions using the Analytical Hierarchy Process(AHP).The research was done using data sampling from a field study carried out in eight mechanically-ventilated commercial broiler *** had positive ventilation(open-sided conventional system),and the other four had negative pressure systems,which were named according to the curtains color and light management(blue-house with blue curtains,and dark-house with black side curtains).The data from the field research(rearing dry-bulb temperature and relative humidity;ammonia and carbon dioxide concentrations;energy use;litter type and quality;and broiler performance)were organized,and the multi-criteria analysis AHP was *** the process,the decision-maker must define the problem and chose the criteria to evaluate the alternatives to make a suitable *** alternative selected needs to be according to the stakeholders’*** alternatives consisted of houses using three ventilation systems(conventional,blue-house,and dark-house).The different chosen criteria were the thermal and aerial environment,broiler productivity,energy consumption,and litter *** selected data collected from the field experiment and from current literature to subsidize the selection of the *** computation was done using field data results,knowledge from existing literature,and the expertise of three *** the first time,the AHP technique is applied to select the most suitable broiler housing,considering the complex variables involved in the *** indicated the conventional system as the most appropriate *** of the conventional system showed the highest scores on most criteria in the pairwise *** considered broiler performance,gasses concentration,and electricity cost,providing natural ventilation open-sided conventional house as the most appropriate rearing system

关键词： AHP Energy use Litter Noxious gasses Poultry production Ventilation system

Long-term observations of tropospheric NO_2, SO_2 and HCHO by MAX-DOAS in Yangtze River Delta area, China

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journal of Environmental Sciences 2018年第9期30卷 207-221页

作者： Xin Tian Pinhua Xie jin Xu ang Li Yang Wang Min Qin Zhaokun Hu School of Environmental Science and Optoeclectronic Technology University of Science and Technology of China Hefei 230026 China. Key laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine Mechanies Chinese Academy of ScienceHefei 2:30031 China CAS Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Max Planck Institute for Chemistry Mainz 55128 Germany

Yangtze River Delta （YRD） area is one of the important economic zones in China. However, this area faces increasing environmental problems. In this study, we use ground-based multi-axis differential optical absorption spectroscopy （MAX-DOAS） network in Eastern China to retrieve variations of NO2, SO2, and formaldehyde （HCHO） in the YRD area. Three cities of YRD （Hefei, Nanjing, and Shanghai） were selected for long-term observations. This paper presents technical performance and characteristics of instruments, their distribution in YRD, and results of vertical column densities （VCDs） and profiles of NO2, SO2, and HCHO. Average diurnal variations of tropospheric NO2 and SO2 in different seasons over the three stations yielded minimum values at noon or in the early afternoon, whereas tropospheric HCHO reached the maximum during midday hours. Slight reduction of the pollutants in weekends occurred in all the three sites. In general trace gas concentrations gradually reduced from Shanghai to Hefei. Tropospheric VCDs of NO2, SO2, and HCHO were compared with those from Ozone Monitoring Instrument （OMI） satellite observations, resulting in R2 of 0.606, 0.5432, and 0.5566, respectively. According to analysis of regional transports of pollutants, pollution process happened in YRO under the north wind with the pollution dissipating in the southeast wind. The feature is significant in exploring transport of tropospheric trace gas pollution in YRD, and provides basis for satellite and model validation.

关键词： MAX-DOAS instrument column densities NO2 HCHO SO2 Yangtze River Delta area Pollution transport

Expeditious and scalable preparation of a Li-Thiele reagent for amine-based bioconjugation

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Chinese Chemical Letters 2021年第2期32卷 700-702页

作者： jiacheng Li Yuyong Ma Xiang Zhang Xin Cao Hegui Gong ang Li Department of Chemistry Shanghai UniversityShanghai 200444China State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences.Shanghai 200032China

Chemoselective amine bioco njugation has long been a challenge for native protein *** by Thiele’s seminal discovery,Li and co-workers recently developed an orto-phthalaldehyde(OPA)based reagent for labeling the amino group of a *** we report an expeditious and scalable synthesis of a Li-Thiele reagent featuring an arene construction *** reagent contains an alkyne side chain as a handle for secondary modification.

关键词： Amine-based bioconjugation Li-Thiele reagent Arene synthesis Ortho-phthalaldehyde

From theme park to cultural tourism town:Disneyization turning of tourism space in China

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Regional Sustainability 2021年第2期2卷 156-163页

作者： Zi’ang Zhang Zengxian Liang jigang Bao School of Geography and Planning Sun Yat-sen UniversityGuangzhou510275China Center for Tourism Planning and Research Sun Yat-sen UniversityGuangzhou510275China School of Tourism Management Sun Yat-sen UniversityGuangzhou510275China

Theme park development has become an important choice for tourism space development in Chinese cities,and the theming of space as well as the implied consumption symbols and cultural implications are usually viewed as examples for the development of other urban spaces,such as cultural tourism *** result is the Disneyization of urban tourism *** the construction of characteristic towns being vigorously promoted throughout China,cultural tourism towns are springing *** are typical of the“Wuzhen Town Mode”and represent the process of the Disneyization of tourism space in *** research reflects on the evolution of the characteristics of tourism space in *** the Wuzhen Town Mode as an example,this study reveals the characteristics and conversion mechanism of the Disneyization of tourism space in Chinese *** to this research,the Wuzhen Town Mode of the Disneyization is characterized by theming,hybrid consumption,merchandising,and performative *** function is a unique characteristic of the Disneyization of cultural tourism towns in ***,the Wuzhen Town Mode of the Disneyization is jointly motivated by the driving force of local governments,the propulsive force of tourist demand,the attractive force of the social environment,and the driving force of ***,suggestions and policy proposals are provided for the Disneyization of tourism space in China.

关键词： Theme park Disneyization Theming Cultural tourism town Tourism space Wuzhen Town China