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The Potential for Technological Advances to Promote the Human Rights Cause
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作者 HUO GUIHUAN 《The Journal of Human Rights》 2013年第3期30-31,共2页
Discussion and study of the relationship between technological advance and human rights development can be achieved through both their interaction and interplay. In other words, we need to research and expound on the ... Discussion and study of the relationship between technological advance and human rights development can be achieved through both their interaction and interplay. In other words, we need to research and expound on the influences of technological advances on human rights development, and vice versa. However, despite the complexity of current human rights developments, this article, given length constraints, will only generally focus on whether technological advances have a potential role in promoting human rights improvements. 展开更多
关键词 The Potential for technological advances to Promote the Human Rights Cause
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Unveiling Global Human Trafficking Trends: A Comprehensive Analysis
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作者 Somtobe Olisah Clement Odooh +5 位作者 Oghenekome Efijemue Echezona Obunadike Jane Onwuchekwa Omoshola Owolabi Saheed Akintayo Callistus Obunadike 《Journal of Data Analysis and Information Processing》 2024年第1期49-75,共27页
This paper presents a comprehensive analysis of global human trafficking trends over a twenty-year period, leveraging a robust dataset from the Counter Trafficking Data Collaborative (CTDC). The study unfolds in a sys... This paper presents a comprehensive analysis of global human trafficking trends over a twenty-year period, leveraging a robust dataset from the Counter Trafficking Data Collaborative (CTDC). The study unfolds in a systematic manner, beginning with a detailed data collection phase, where ethical and legal standards for data usage and privacy are strictly observed. Following collection, the data undergoes a rigorous preprocessing stage, involving cleaning, integration, transformation, and normalization to ensure accuracy and consistency for analysis. The analytical phase employs time-series analysis to delineate historical trends and utilizes predictive modeling to forecast future trajectories of human trafficking using the advanced analytical capabilities of Power BI. A comparative analysis across regions—Africa, the Americas, Asia, and Europe—is conducted to identify and visualize the distribution of human trafficking, dissecting the data by victim demographics, types of exploitation, and duration of victimization. The findings of this study not only offer a descriptive and predictive outlook on trafficking patterns but also provide insights into the regional nuances that influence these trends. The article underscores the prevalence and persistence of human trafficking, identifies factors contributing to its evolution, and discusses the implications for policy and law enforcement. By integrating a methodological approach with quantitative analysis, this research contributes to the strategic planning and resource allocation for combating human trafficking. It highlights the necessity for continued research and international cooperation to effectively address and mitigate this global issue. The implications of this research are significant, offering actionable insights for policymakers, law enforcement, and advocates in the ongoing battle against human trafficking. 展开更多
关键词 Human Trafficking Global Trends Data Analysis Victim Demographics Policy Implications technological Advancements Socioeconomic Factors Forecasting Regional Disparities Transnational Crime
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The crucial role of surveillance in disease outbreak control:a comprehensive review
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作者 Gehendra Mahara Reg Bhandari Dandan Zhou 《汕头大学医学院学报》 2024年第3期187-192,共6页
Surveillance systems are vital for detecting,managing,and mitigating infectious disease outbreaks.This review highlights the importance of modern technologies like AI and big data in enhancing surveillancecapabilities... Surveillance systems are vital for detecting,managing,and mitigating infectious disease outbreaks.This review highlights the importance of modern technologies like AI and big data in enhancing surveillancecapabilities.It underscores the need for global collaboration and examines the role of surveillance in diseases likeinfluenza,Ebola,and COVID-19.Technological innovations such as geospatial mapping and wearable healthdevices are transforming disease control,though they raise ethical concerns about privacy.Continuousadvancements and ethical safeguards are crucial for effective surveillance and global health protection. 展开更多
关键词 disease surveillance early detection global collaboration technological advancements ethical considerations
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RECENT ADVANCES IN HYDRATE-BASED TECHNOLOGIES FOR NATURAL GAS STORAGE——A REVIEW 被引量:28
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作者 Yasuhiko H.Mori 《化工学报》 EI CAS CSCD 北大核心 2003年第z1期1-17,共17页
Interest in the possibility of storing and transporting natural gas in the form of clathrate hydrates has been increasing in recent years, particularly in some gas-importing and exporting countries.The technologies ne... Interest in the possibility of storing and transporting natural gas in the form of clathrate hydrates has been increasing in recent years, particularly in some gas-importing and exporting countries.The technologies necessary for realizing this possibility may be classified into those relevant to the four serial processes (a) the formation of a hydrate, (b) the processing (dewatering, pelletizing, etc. ) of the formed hydrate, (c) the storage and transportation of the processed hydrate, and (d) the regasification (dissociation) of the hydrate. The technological development of any of these processes is still at an early stage. For hydrate formation, for example, various rival operations have been proposed. However,many of them have never been subjected to actual tests for practical use. More efforts are required for examining the different hydrate-formation technologies and for rating them by comparison. The general design of the processing of the formed hydrate inevitably depends on both the hydrate-formation process and the storage/transportation process, hence it has a wide variability. The major uncertainty in the storage-process design lies in the as-yet unclarified utility of the "self-preservation" effect of the naturalgas hydrates. The process design as well as the relevant cost evaluation should strongly depend on whether the hydrates are well preserved at atmospheric pressure in large-scale storage facilities. The regasification process has been studied less extensively than the former processes. The state of the art of the technological development in each of the serial processes is reviewed, placing emphasis on the hydrate formation process. 展开更多
关键词 into rate or AS of that RECENT advances IN HYDRATE-BASED TECHNOLOGIES FOR NATURAL GAS STORAGE A REVIEW been
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Advances in Drilling Instead of Trenching Technology 被引量:1
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作者 ZHAO Hongbo HE Yuanxin SONG Dianlan 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第4期1415-1416,共2页
Traditional surface exposure methods,such as trenching and exploratory shaft sinking,have their own limitations and do harm to the environment.Thus,shallow drilling was applied in geological mapping to expose shallow ... Traditional surface exposure methods,such as trenching and exploratory shaft sinking,have their own limitations and do harm to the environment.Thus,shallow drilling was applied in geological mapping to expose shallow orebody and to determine the thickness of top soil layer,and then to illustrate bedrock lithology and geological boundary.It can also help to study geological structures and to reveal the orebody shape,and further to combine with rock core sampling and chemical analysis to develop the systematic method of drilling instead of trenching technology. 展开更多
关键词 advances in Drilling Instead of Trenching Technology
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DEVELOP SERIES PRODUCTS OF ROBOTS TO PROMOTE THE TECHNOLOGICAL ADVANCEMENT OF THE MANUFACTURING INDUSTRY
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作者 Wang Tianran and Qu Daokui(Shenyang Institute of Automation, Shenyang 110015) 《Bulletin of the Chinese Academy of Sciences》 2000年第1期35-38,共4页
As a typical representative and main technicalmeans of advanced manufacturing technology,robotic technology plays an important role in raisingan enterpse’s engineering level, improving its prod-uct quality and produc... As a typical representative and main technicalmeans of advanced manufacturing technology,robotic technology plays an important role in raisingan enterpse’s engineering level, improving its prod-uct quality and productivity, and realizing civilizedproduction. Currently, there are nearly one millionrobots of various kinds, which are employed widelyin different fields of manufacturing industry. Robot-ics is now one of the high technologies, which arecompetitively developed by the developed coun- 展开更多
关键词 SIA AGV DEVELOP SERIES PRODUCTS OF ROBOTS TO PROMOTE THE technological ADVANCEMENT OF THE MANUFACTURING INDUSTRY
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Review of advanced road materials, structures, equipment, and detection technologies 被引量:2
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作者 JRE Editorial Office Maria Chiara Cavalli +37 位作者 De Chen Qian Chen Yu Chen Augusto Cannone Falchetto Mingjing Fang Hairong Gu Zhenqiang Han Zijian He Jing Hu Yue Huang Wei Jiang Xuan Li Chaochao Liu Pengfei Liu Quantao Liu Guoyang Lu Yuan Ma Lily Poulikakos Jinsong Qian Aimin Sha Liyan Shan Zheng Tong B.Shane Underwood Chao Wang Chaohui Wang Di Wang Haopeng Wang Xuebin Wang Chengwei Xing Xinxin Xu Min Ye Huanan Yu Huayang Yu Zhe Zeng You Zhan Fan Zhang Henglong Zhang Wenfeng Zhu 《Journal of Road Engineering》 2023年第4期370-468,共99页
As a vital and integral component of transportation infrastructure,pavement has a direct and tangible impact on socio-economic sustainability.In recent years,an influx of groundbreaking and state-of-the-art materials,... As a vital and integral component of transportation infrastructure,pavement has a direct and tangible impact on socio-economic sustainability.In recent years,an influx of groundbreaking and state-of-the-art materials,structures,equipment,and detection technologies related to road engineering have continually and progressively emerged,reshaping the landscape of pavement systems.There is a pressing and growing need for a timely summarization of the current research status and a clear identification of future research directions in these advanced and evolving technologies.Therefore,Journal of Road Engineering has undertaken the significant initiative of introducing a comprehensive review paper with the overarching theme of“advanced road materials,structures,equipment,and detection technologies”.This extensive and insightful review meticulously gathers and synthesizes research findings from 39 distinguished scholars,all of whom are affiliated with 19 renowned universities or research institutions specializing in the diverse and multidimensional field of highway engineering.It covers the current state and anticipates future development directions in the four major and interconnected domains of road engineering:advanced road materials,advanced road structures and performance evaluation,advanced road construction equipment and technology,and advanced road detection and assessment technologies. 展开更多
关键词 Road engineering Advanced road material Advanced road structure Advanced road equipment Advanced road detection technology
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China's Economic Outlook into 2030: Transformation, Simulation and Policy Suggestions 被引量:2
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作者 张平 王宏淼 《China Economist》 2011年第4期4-15,共12页
This article discusses China's economic growth path and the potential challenges to becoming a high-income country by utilizing simulation to provide potential policy responses. The authors believe it is necessary to... This article discusses China's economic growth path and the potential challenges to becoming a high-income country by utilizing simulation to provide potential policy responses. The authors believe it is necessary to optimize spatial allocation and promote urbanization, but distorted urbanization must be avoided as it will only perpetuate the current problems. The core strategy is to change government behavior to allow the market to allocate resources. It is important to maintain stable growth in the short term and balance the economic structure in the medium- and long-term. In particular, optimizing spatial allocation must constitute a critical part of the policy adjustment. Only with a viable urbanization model can the country shift from the catch-up pursuit via industrialization to a balanced approach of sustainable growth. This can be done through gradual guidance and policy corrections. China should continue to uphold the "scientific concept of development" as the overarching principle governing socioeconomic development, and create a unique approach to sustainability where the economy grows steadily, sharing is universal and people live in harmony with nature. 展开更多
关键词 balanced structure economic growth sustainable development urbanization technological advances
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A novel advanced oxidation process to degrade organic pollutants in wastewater:Microwave-activated persulfate oxidation 被引量:41
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作者 YANG Shiying WANG Ping +3 位作者 YANG Xin WEI Guang ZHANG Wenyi SHAN Liang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第9期1175-1180,共6页
This article, for the first time, provides a novel advanced oxidation process based on sulfate radical (SO^4·-) to degrade organic pollutants in wastewater: microwave (MW)-activated persulfate oxidation (AP... This article, for the first time, provides a novel advanced oxidation process based on sulfate radical (SO^4·-) to degrade organic pollutants in wastewater: microwave (MW)-activated persulfate oxidation (APO) with or without active carbon (AC). Azo dye acid Orange 7 (AO7) is used as a model compound to investigate the high reactivity of MW-APO. It is found that AO7 (up to 1000 mg/L) is completely decolorized within 5-7 min under an 800 W MW furnace assisted-APO. In the presence of chloride ion (up to 0.50 mol/L), the decolorization is still 100% completed, though delayed for about 1-2 min. Experiments are made to examine the enhancement by AC. It is exciting to find that the 100% decolorization of AO7 (500 mg/L) is achieved within 3 min by MW-APO using 1.0 g/L AC as catalyst, while the degradation efficiency maintains at 50% by MW energy without persulfate after about 5 min. Besides the destruction of visible light chromophore band of AO7 (484 nm), during MW-APO, two bands in the ultraviolet region (228 nm and 310 nm) are rapidly broken down. The removal of COD is about 83%-95% for 500 mg/L AO7. SO^4·- is identified with quenching studies using specific alcohols. Both SO^4·- and ·OH could degrade AO7, but SO^4·- plays the dominant role. In a word, MW-APO AC is a new catalytic combustion technology for destruction of organic contamination even for high concentration. 展开更多
关键词 microwave-activated persulfate oxidation active carbon sulfate radical advanced oxidation technology
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Development of Hot Dip Galvanized Steel Strip and Its Application in Automobile Industry 被引量:4
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作者 BIAN Jun ZHU Yun +1 位作者 LIU Xiang-hua WANG Guo-dong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第3期47-50,共4页
Hot dip galvanized product is widely used in architecture, household electric appliance, ship vehicle, vessel, mechano-electronic device and other fields including clothing, food, housing, and travel. The history, dev... Hot dip galvanized product is widely used in architecture, household electric appliance, ship vehicle, vessel, mechano-electronic device and other fields including clothing, food, housing, and travel. The history, development, market need, and technological advancement of hot dip galvanized strip, production situation, and development tendency in China are briefly introduced. The fact that it is necessary to build new and auto galvanized strip line with the development of the iron and steel industry in China. 展开更多
关键词 hot dip galvanizing DEVELOPMENT technological advancement new galvanizing line
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Prevention and treatment technologies of railway tunnel water inrush and mud gushing in China 被引量:19
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作者 Yong Zhao Pengfei Li Siming Tian 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2013年第6期468-477,共10页
Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in ex... Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in extent. Furthermore, due to the different heights of mountains and the lengths of tunnels, the locations of the unfavorable geological sections cannot be fully determined before construction, which increases the risk of water inrush and mud gushing. Based on numerous cases of water inrush and mud gushing in railway tunnels, the paper tries to classify water inrush and mud gushing in railway tunnels in view of the conditions of the surrounding rocks and meteorological factors associated with tunnel excavation. In addition, the causes of water inrush and mud gushing in combination of macroand micromechanisms are summarized, and site-specifc treatment method is put forward. The treatment methods include choosing a method of advance geological forecast according to risk degrees of different sections in the tunnel, determining the items of predictions, and choosing the appropriate methods, i.e. draining-oriented method, blocking-oriented method or draining-and-blocking method. The treatment technologies of railway water inrush and mud gushing are also summarized, including energy relief and pressure relief technology, advance grouting technology, and advance jet grouting technology associated with their key technical features and applicable conditions. The results in terms of treatment methods can provide reference to the prevention and treatment of tunnel water inrush and mud gushing. 展开更多
关键词 Tunnel engineering Unfavorable geological regions Water inrush and mud gushing Pressure relief technology Advance grouting technology Advance jet grouting
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Catalytic degradation of methylene blue by Fenton like system: model to the environmental reaction 被引量:4
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作者 Sanjay R Thakare 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第2期285-287,共3页
To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absenc... To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absence of light instead of Fe(Ⅱ) and H 2O 2 was studied. Results showed that use of Fe (Ⅲ) is more promising than Fe(Ⅱ). The present study reflects that Fenton reaction is more efficient, in the presence of a small amount of salicylic acid is added which is a one of the priority pollutant. 展开更多
关键词 advanced oxidation technology Fenton reaction iron(Ⅲ) catalytic degradation environmental application
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EFFECT OF UNEQUAL DEFORMATION IN DEVELOPMENT OF ADVANCED PLASTIC PROCESSING TECHNOLOGIES 被引量:3
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作者 Yang He Xian Feijun College of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2002年第1期79-82,共4页
An effect of unequal deformation in development of advanced plasticprocessing technologies is researched by studying an in-plane bending process of strip metal underunequal compressing. The research results show the f... An effect of unequal deformation in development of advanced plasticprocessing technologies is researched by studying an in-plane bending process of strip metal underunequal compressing. The research results show the following: If appropriately controlled, unequalplastic deformation can play an important role not only in the improvement of quality of partsobtained by plastic processing technologies, but also in the development of new processes foradvanced plastic working technologies. A coordinated growth of unequal plastic deformation candevelop the deformation potentiality of material to the fall. The degree of unequal plasticdeformation can be used as bases for optimization design of processes and dies of plastic forming. 展开更多
关键词 Unequal plastic deformation In-plane bending Net shape process Computer simulation Advanced manufacturing technology
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Exploration of the dynamic water resource carrying capacity of the Keriya River Basin on the southern margin of the Taklimakan Desert,China 被引量:4
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作者 Shuhong Yang Tao Yang 《Regional Sustainability》 2021年第1期73-82,共10页
The water resource carrying capacity(WRCC)in river basin changes dynamically under climate change,economic development,and technological advancement.Climate change affects hydrological processes and spatial/temporal d... The water resource carrying capacity(WRCC)in river basin changes dynamically under climate change,economic development,and technological advancement.Climate change affects hydrological processes and spatial/temporal distribution of water resources;while economic develo-ment and technological advancement can also affect the balance of water resources systems.Under climate change,economic development,and technological advancement,itis of great significance to explore the dynamic behavior of WRCC in river basins.This will help to alleviate water resources security issues and build a sustainable water resources system.This study was carried out to evaluate the dynamic WRCC using the"climate,economics,and technology-control objective inversion mode",which used total water consumption,water-use efficiency,and restrained total pollutant control in the water functional area as boundary conditions.This study was conducted on the Keriya River Basin,a sub-catchment located in southem margin of the Taklimakan Desert.The WRCC in the Keriya River Basin in 2015 was calculated,and the trends in the short term(2020),middle tem(2030),and long term(2050)were predicted.The results revealed that climate change factors have a positive effect on WRCC in the Keriya River Basin,which leads to an increase in total water resources.Economic and technological development exhibits an overall positive effect,while increasing in water consumption and sewage discharge exhibit a negative effect. 展开更多
关键词 Climate change Economic development technological advancement Water resource carrying capacity Keriya River Basin
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SMART: The First Licensed Advanced Integral Reactor 被引量:3
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作者 Keung Koo Kim Wonjae Lee Shun Choi Hark Rho Kim Jaejoo Ha 《Journal of Energy and Power Engineering》 2014年第1期94-102,共9页
SMART (system-integrated modular advanced reactor) is a small-sized advanced integral reactor with a rated thermal power of 330 MW. It can produce 100 MW of electricity, or 90 MW of electricity and 40,000 t of desal... SMART (system-integrated modular advanced reactor) is a small-sized advanced integral reactor with a rated thermal power of 330 MW. It can produce 100 MW of electricity, or 90 MW of electricity and 40,000 t of desalinated water concurrently, which is sufficient for 100,000 residents. SMART technology is a sensible mixture of new innovative design features and proven technologies through a PWR. The enhancement of safety and reliability is realized by incorporating inherent safety features and reliable passive safety systems. The improvement in the economics is achieved through system simplification, component modularization, construction time reduction, and increased plant availability. All technologies and design features implemented into SMART have been proven in industries and/or qualified through the SMART design verification program including comprehensive test and experiments. The full scope of the safety analyses carried out to confirm that the inherent safety-improvement design characteristics and safety systems of SMART ensure reactor safety. After a thorough licensing review, SDA (standard design approval) for SMART was granted on July 4th, 2012 by the Korea NSSC (Nuclear Safety and Security Commission). This marks the first license for an integral-type reactor in the world. This paper presents the SMART characteristics, safety features and technology validation. The licensing process of SMART is also described. 展开更多
关键词 SMR advanced technology passive safety system technology validation standard design SMART.
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Current Advanced Power Generation Technologies and Options for China (2) 被引量:1
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作者 Mohsen Assadi 《Electricity》 2008年第4期40-46,共7页
In China, electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance en... In China, electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future. Here published is the second part of the paper. 展开更多
关键词 Current Advanced Power Generation Technologies and Options for China
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Current Advanced Power Generation Technologies and Options for China(1) 被引量:1
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作者 Mohsen Assadi 《Electricity》 2008年第3期36-40,共5页
In China, electricity consumption keeps growing at a high speed and installed capacity will be dou- bled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance ... In China, electricity consumption keeps growing at a high speed and installed capacity will be dou- bled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future. 展开更多
关键词 Current Advanced Power Generation Technologies and Options for China
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Theoretical Analysis of Nano Displacement of Nanometer Precision Actuator and Its Application
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作者 ZHENG Wei, HUANG Yuan-qing (Dept. of Mechatronics, Xiamen University, Xiamen 361005, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期85-,共1页
The kind of micro-/nano-meter precision actuator in cludes a piezoelectric one, an electric deformation one, a magnetic deformation one, a mechanical one, and a mechanical and electrical one. This paper puts forw ard ... The kind of micro-/nano-meter precision actuator in cludes a piezoelectric one, an electric deformation one, a magnetic deformation one, a mechanical one, and a mechanical and electrical one. This paper puts forw ard a mechanical and electrical step actuator of nanometer precision, which cons ists of a step motor of large fine-dividing number of step angle, shaft couplin gs, a decelerator of large decelerating ratio, a screw mechanism and a pole of U shape, and has the minimum step displacement of 10 nm, the step displac ement precision of 1 nm, the step frequency of 4 kHz, the maximum loadability of 20 kg. In order to achieve the nano displacement of nano precision by this actu ator, the theoretical analysis of stress and strain must be made on the transmit ting course of nano displacement of the actuator, and their numerical simulation is done by computer. The paper establishes the constitutive equation of 3-D stress and the strain co ordinate equation of the composing system of the nanometer precision actuator. A s a result, the theoretical relation among stress and strain and displacement is set up. The torque of the step motor produces a thrust to transmit the displace ment of the above system of the parts and assemblies to output the needed nano d isplacement. In the case of concrete analysis and calculating, the comparing met hod of film-roof is applied to analyze and calculate the motor axis, decelerato r axes, the screw pole and the nut. The analysis method of plane stress and stra in is used to analyze and calculate the shaft couplings and gears. The analysis method of beam stress and strain is used to do the pole of U shape. These calcul ation is belong to the physical non-linear problem. Under the condition of smal l deformation, the analysis way of the finite element can be combined with the a bove analyses and calculations. The elementary analysis results show that the na nometer precision actuator can be applied in STM nanofabrication. 展开更多
关键词 step micro-actuator theoretical analysis MEMS advanced manufacturing technology micro-/nano-technology
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Precision Analysis of Three Dimension Free Curves Nanofabrication
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作者 ZHENG Wei 1, WANG Er-qi 2, SONG De-hui 2, W B LEE 3, S andy TO 3 (1. Department of Mechatronics, Xiamen University, 2. College of Computer and Information Engineering, Xiamen University, Xiamen 361005, China 3. Ultra-Precision Machining Centre, Department of Industrial and Systems Engin eering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期279-,共1页
Three dimension free curves find wide applications in engineering. There is no problem to express them exactly mathematically, but th e reportage has not been done on the investigation of precision analysis of thre e-... Three dimension free curves find wide applications in engineering. There is no problem to express them exactly mathematically, but th e reportage has not been done on the investigation of precision analysis of thre e-dimension free curves nanofabrication. Nanofabrication Precision includes the geometrical precision and the precision of driving system (below simply cal led the system precision). This paper submits the precision analysis method of c urve normal vector to analyze geometrical precision. Take an aspherical surf ace for example, it can be fitted and constructed by tensor product parameter cu rves, such as linear drawing curves, straight veins curves, rotating curves, swe eping curves, DUCT curves and Geomap curves. Then the curves of the aspherical s urface is iterated and modified to select the best fitted curves of the aspheric al surface. Finally, the geometrical precision of perfect approximate aspherical surface fitting has been sought. This kind of geometrical fitting construction is very important. Another is the system precision, which contains axial position precision, line p recision, and twisting and swinging precision, etc. The paper adopts the theory of precision optimum match (Prof. Wang Er-qi first put forward in 19 83) to allocate precision optimumly. The minimum cost is used as an objective fu nction, and weight method matches the precision. To obtain the optimum match combination of the minimum cost design parameters and every composing element t olerance, the precision is iterated and sought optimumly to design the system op timumly. The theoretical analysis shows that it’s feasible to control three dim ension free curves nanofabrication within nanometer scale precision. 展开更多
关键词 three dimension curves PRECISION optimum match advanced manufacturing technology micro-/nano-technology
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Chinese Bio-oxidation Gold Extraction Technology Reaches International Advanced Level
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作者 HAO Ziguo FEI Hongcai +2 位作者 LIU Lian HAO Qingqing Susan TURNER 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第5期1617-1617,共1页
In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold rec... In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold recoveries and become "stay mine". Features of refi'actory gold ores are: gold in micro-particles or a microscopic state that is wrapped in pyrite, presence of arsenopyrite and other sulfide minerals or disseminated in the crystal lattice of sulfide minerals; harmful impurity elements such as arsenic, carbon, mercury, antimony, copper with high content are closely related with the gold, and these elements affect the contact reaction between the gold and solvent extraction, making the recovery of the gold extraction process low. In the past 20 years, overseas countries have developed the application of the roasting oxidation method, hot acid (alkali) oxidation, bacterial oxidation and flash chlorination oxidation technology to solve this problem.Among these, biological oxidation has developed rapidly in the domestic market and gold enterprises abroad because of its low investment in infrastructure, low production costs, less environmental pollution, simple process and easy control, etc. 展开更多
关键词 Gold In Chinese Bio-oxidation Gold Extraction Technology Reaches International Advanced Level
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