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A Life-skills-based HIV/AIDS Prevention Education for Rural Students of Primary Schools in China:What Changed? What Have We Learned?

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Biomedical and Environmental Sciences 2010年第5期23卷 409-419页

作者： WEI liao JING-MEI JIANG BIN YANG XIN ZENG su-su liao Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic Medicine Peking Union Medical CollegeBeijing 100005China Hainan Center for Disease Control & Prevention Haikou 570203HainanChina Education Department of Hainan Province Haikou 570203HainanChina

Objective To evaluate a four-hour life-skills-based HIV/AIDS prevention curriculum among 5th grade students in rural primary schools of Hainan *** The study included two *** one （September 2006-May 2007） was a pre-post-quasi experimental design;a total of 2 413 students aged 9 to 14 years from fifth grade classes of nine primary schools completed a baseline survey （1 720 students were in the intervention group,693 in the control group）,and over 98% of them took part in a short *** experimental curriculum was provided to the intervention *** stage two （September 2008）,a cross-sectional questionnaire was administered to 6 923 students in 7th grade classes of eight middle schools in the same study *** were 1 437 students in the intervention group when the curriculum was *** Students tended to score higher in areas of HIV/AIDS related knowledge and attitudes,if they were younger than average,lived in the county seat,had access to the internet,and their parents had completed higher levels of *** analysis showed that,after controlling for characteristics such as family and community factors,the total effects of curriculum on knowledge in the short-term model increased remarkably compared with the baseline,and maintained major contributions to knowledge in the mid-term *** positive effect of knowledge on attitudes was significantly improved in the short-term model as *** A life-skills based curriculum can improve HIV/AIDS related knowledge and self-perceived level of life-skills among primary school students in rural areas in a short time,and these positive effects can still be observed at least 2 years post participation in the curriculum.

关键词： Adolescent HIV/AIDS prevention Life-skills education Effect evaluation Rural area Intervention research

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A Jury-Based Trust Management Mechanism in Distributed Cognitive Radio Networks

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China Communications 2015年第7期12卷 119-126页

作者： su Wengui liao Yang School of Mechanical Engineering Guangxi University Data Center Bank of China Limited

In the trust management scheme of the distributed cognitive radio networks, the absence of the central control devices cause many problems such as a lack of standardized control for trust computation, and the absence of the decision makers in trust evaluation and collaborative decision making. A trust management mechanism based on the jury system for distributed cognitive radio networks is proposed in this paper. The "jury user" is designed to collaboratively examine the reputation of the cognitive user in the networks and to perform data fusion and spectrum allocation for distributed cognitive radio networks. Simulation analysis results show that the proposed scheme can ensure accuracy and fairness in trust evaluation and improve effectiveness and flexibility of spectrum allocation.

关键词： cognitive radio network trust scheme jury system distributed network trust evaluation

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Stereoselective synthesis of biodegradable polymers by salen-type metal catalysts

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Science China Chemistry 2022年第11期65卷 2096-2121页

作者： Xi liao Ya su Xiaoyan Tang Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Biodegradable polymers are a promising sustainable alternative to conventional petroleum-based polymers and have attracted recent extensive research interest due to their potential environmental friendliness and sustainability. Among them, aliphatic polyesters and polycarbonates are the most extensively studied ones. The metal-catalyzed ring-opening polymerization(ROP) of cyclic esters and ring-opening copolymerization(ROCOP) of epoxides with anhydrides or CO_(2) are often considered to be the classic and efficient methods to synthesize stereoregular polymers. Moreover, the versatile salen-type metal complexes have been used to prepare almost all types of biodegradable polymers with excellent stereoselectivity control. Hence, this review focuses on stereoselective synthesis of biodegradable polymers by salen-type metal catalysts developed in the last *** polyesters from ROP of cyclic esters, ROCOP of epoxides with cyclic anhydrides, and carbonylative polymerization of epoxides, as well as aliphatic poly(thio)carbonate from ROCOP of epoxides with CO_(2) or COS are discussed in detail. This review highlights the polymerization mechanisms, catalyst characteristics, and factors controlling the stereoselectivity of each polymerization reaction, aiming to provide general rules for the future design of stereoselective catalysts.

关键词： stereoselective ring-opening(co)polymerization salen-based metal complexes biodegradable polymers polyesters poly(thio)carbonates

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Application of in situ/operando characterization techniques in heterostructure catalysts toward water electrolysis

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Nano Research 2023年第2期16卷 1984-1991页

作者： Wanyi liao Shanshan Wang Hong su Yan Zhang Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs School of Life Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China

The key to achieving the breakthrough of hydrogen energy from marginal energy sources in large scale applications lies in the development and design of efficient electrocatalysts for the electrochemical oxidation and reduction of *** unique heterostructure endows the catalyst with a mass of functional interfaces that are decisive for the enhancement of catalyst activity,stability,and reaction *** some cutting-edge reviews have focused on the synthesis strategies,constitution,and applications of heterostructure catalysts,the field still lacks a detailed discussion of the actual reaction processes occurring at the interface,which is detrimental to the understanding of the true catalytic *** on advanced in situ/operando characterization techniques to understand the working mechanism of heterostructure catalysts is essential for rational design of advanced *** this review,we first present the advantages of heterostructure catalysts applied to electrolyzing ***,the application of in situ/operando techniques in probing three aspects of heterostructure catalyst surface reconstruction,reaction mechanism,and the role of each component is highlighted with classical case ***,the current challenges and prospects for the design of heterostructure electrocatalysts are discussed in detail.

关键词： in situ/operando characterization heterostructure reconfiguration reaction mechanism electrochemical water splitting

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Digitizing the thermal and hydrological parameters of land surface in subtropical China using AMSR-E brightness temperatures

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International Journal of Digital Earth 2017年第7期10卷 687-700页

作者： Yongxian su Xiuzhi Chen Hua su Liyang Liu Jishan liao Key Lab of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangzhouPeople’s Republic of China Jiangsu Key Laboratory of Agricultural Meteorology College of Applied MeteorologyNanjing University of Information Science and TechnologyNanjingPeople’s Republic of China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhouPeople’s Republic of China Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education National Engineering Research Centre of Geo-spatial Information TechnologyFuzhou UniversityFuzhouPeople’s Republic of China

Digitizing the land surface temperature(T_(s))and surface soil moisture(m _(v))is essential for developing the intelligent Digital ***,we developed a two parameter physical-based passive microwave remote sensing model for jointly retrieving T_(s) and m_(v) using the dual-polarized T_(b) of Aqua satellite advanced microwave scanning radiometer(AMSR-E)C-band(6.9 GHz)based on the simplified radiative transfer *** using in situ T_(s) and m_(v) in southern China showed the average root mean square errors(RMSE)of T s and m_(v) retrievals reach 2.42 K(R^(2)=0.61,n=351)and 0.025 g cm^(−3)(R^(2)=0.68,n=663),*** results were also validated using global in situ T_(s)(n=2362)and m_(v)(n=1657)of International Soil Moisture *** corresponding RMSE are 3.44 k(R 2=0.86)and 0.039 g cm^(−3)(R^(2)=0.83),*** monthly variations of model-derived Ts and mv are highly consistent with those of the Moderate Resolution Imaging Spectroradiometer T_(s)(R^(2)=0.57;RMSE=2.91 k)and ECV_SM m_(v)(R^(2)=0.51;RMSE=0.045 g cm^(−3)),***,this paper indicates an effective way to jointly modeling T_(s) and m_(v) using passive microwave remote sensing.

关键词： surface soil moisture land surface temperature physical-based radiative transfer model AMSR-E brightness temperatures

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Indirect Adaptive Robust Trajectory Tracking Control of Hard Rock TBM with Load Variation of Tunneling Face

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Chinese Journal of Mechanical Engineering 2019年第2期32卷 168-179页

作者： Chengjun Shao Jianfeng liao Zhitao Liu Hongye su State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

Posture adjustment of open-type hard rock tunnel boring machine(TBM) can be achieved by properly adjusting the hydraulic pressure of gripper cylinder and torque cylinders. However, the time-varying inhomogeneous load acting on tunneling face of TBM and complex stratum working condition can cause the trajectory deviation. In this paper,the position and posture rectification kinematics and dynamics models of TBM have been established in order to track the trajectory. Moreover, there are uncertain parameters and uncertain loads from complex working conditions in the dynamic model. An indirect adaptive robust control strategy is applied to achieve precise position and posture trajectory tracking control. Simulation results show when the position deviation only occurs in Y-axis and the current orientation is parallel with the designed axis, the deviation can be corrected by controlling the pressure of gripper cylinder and the actual trajectory meets the designed axis when TBM is pushed forward 0.14 m in X-axis. If the deviation only occurs in Z-axis, then the deviation can be corrected by controlling torque cylinders. If the position deviation occurs both in Y-axis and Z-axis at the same time, the pressure of gripper cylinder and torque cylinders should be controlled at the same time to rectify the deviation. Simulation results are shown to illustrate the e ectiveness and robustness of the proposed controller. This research proposes an indirect adaptive robust controller that can track the planned tracking trajectory smoothly and rapidly.

关键词： Open type hard rock TBM Inhomogeneous load Position and posture rectification Indirect adaptive robust control

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Application of neutrosophic minimum spanning tree in electrical power distribution network

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CAAI Transactions on Intelligence Technology 2020年第2期5卷 99-105页

作者： Xiao Qun liao Tong su Li Ma Information&Network Center Xi’an University of Science and TechnologyXi’anShaanxi 710054People’s Republic of China

The problem of finding the minimum spanning tree(MST)is one of the most studied and important combinatorial optimisation problems in graph *** types of uncertainties exist in real-life problems,which make it very hard to find the exact length of the *** neutrosophic set is an efficient tool to model and deal with the uncertainties in information due to inconsistent and *** this study,the authors use triangular neutrosophic numbers to represent the edge weights of a neutrosophic graph for the MST problem in the neutrosophic *** call this problem a neutrosophic MST(NMST)*** formulate the NMST problem in terms of the linear programming ***,they introduce an algorithmic method based on a genetic algorithm for solving the NMST *** present the utility of triangular neutrosophic numbers as edge weights and their application in the electrical distribution network.

关键词： theory. spanning weights

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Temperature-regulated typeⅡgrass carp reovirus establishes latent infection in Ctenopharyngodon idella brain

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Virologica Sinica 2023年第3期38卷 440-447页

作者： Rui Jiang Jie Zhang Zhiwei liao Wentao Zhu Hang su Yongan Zhang Jianguo su College of Fisheries Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan430070China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and TechnologyQingdao266237China

Grass carp reovirus(GCRV)causes extensive infection and death in grass carp and black carp fingerlings,with a highly seasonal *** studies suggested that GCRV can become latent after primary *** this study,we investigated type II GCRV(GCRV-II)latency in asymptomatic grass carp with GCRV infection or exposure *** found that during latent infection,GCRV-II was detectable only in the brain of grass carp,unlike the multi-tissue distribution observed in natural ***-II only caused damage to the brain during latent infection,while in natural infection,brain,heart,and eye tissues had relatively higher viral *** also discovered viral inclusion bodies in infected fish ***,GCRV-II distribution in grass carp was notably affected by ambient temperature,with the virus targeting the brain only during low temperatures and multi-tissue distribution during high *** study provides insights into the mechanisms of GCRV-II latent infection and reactivation and contributes to the prevention and control of GCRV pandemics.

关键词： Grass carp Grass carp reovirus(GCRV) Latent infection Brain

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Enhanced electro-oxidation of formic acid by a PdPt bimetallic catalyst on a CeO_2-modified carbon support

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Science China Chemistry 2012年第3期55卷 391-397页

作者： YANG LiJun su HuaNeng SHU Ting liao ShiJun School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510641China

PdPt bimetallic catalysts that employ CeO2-modified carbon black as a support have been prepared using an organic colloidal method. PdPt/CeO2-C shows excellent performance toward the anodic oxidation of formic acid. The effects of varying both Pd to Pt ratio and CeO2 content have been investigated. The optimal Pd to Pt atomic ratio is 15, indicating that addition of small amounts of Pt can significantly enhance the activity of the catalyst. When the CeO2 content in the catalyst reaches as high as ~15 wt.%, the catalyst shows the maximum activity. Adding CeO2 not only enhances the catalytic activity of the material, but may also change the mechanism of its catalysis of the anodic oxidation of formic acid. PdlsPh/15CeO2-C exhibited 60% higher activity than Pd/C, and had a negative shift in onset potential of more than 0.1 V. Based on characterization by X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis and transmission electron microscopy, the interactions between the components are revealed and discussed in detail.

关键词： platinum palladium cerium oxide direct formic acid fuel cell

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Manufacturing Resource Planning Technology Based on Genetic Programming Simulationnn

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Chinese Journal of Mechanical Engineering 2009年第2期22卷 177-183页

作者： GAO Shiwen liao Wenhe GUO Yu LIU Jinshan su Yan College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210013 China China Aerospace of Science and Technology Corporation Beijing 10003 7 China

Network-based manufacturing is a kind of distributed system, which enables manufacturers to finish production tasks as well as to grasp the opportunities in the market, even if manufacturing resources are insufficient. One of the main problems in network-based manufacturing is the allocation of resources and the assignment of tasks rationally, according to flexible resource distribution. The mapping rules and relations between production techniques and resources are proposed, followed by the definition of the resource unit. Ultimately, the genetic programming method for the optimization of the manufacturing system is put forward. A set of software for the optimization system of simulation process using genetic programming techniques has been developed, and the problems of manufacturing resource planning in network-based manufacturing are solved with the simulation of optimizing methods by genetic programming. The optimum proposal of hardware planning, selection of company and scheduling will be obtained in theory to help company managers in scientific decision-making.

关键词： resource planning network-based manufacturing simulation optimization initial scheduling

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