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Genetic Engineering Aims to Take a Bite Out of Insect Pests

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Engineering 2022年第11期18卷 6-8页

作者： chris Palmer Senior Technology Writer

In March 2022,the US Environmental Protection Agency(EPA)cleared the Abingdon,UK-based biotech company Oxitec to release up to 2.4 billion genetically modified(GM)mosquitoes through 2024 in California and Florida[1].The Oxitec mosquitoes—in this case,Aedes aegypti males—are engineered to produce only male offspring and not the female mosquitoes that feed on blood and vector disease(Fig.1).Releasing large numbers of these GM males aims to reduce the overall mosquito population and thereby the spread of the diseases they can *** Aedes aegypti,this includes the viral illnesses yellow fever,dengue,and Zika;other mosquitoes—in the genus Anopheles—transmit the age-old parasitic protozoan scourge of malaria that remains a front-line public health problem in the developing world,against which GM approaches are also being explored.

关键词： diseases thereby yellow

Cadmium,chromium,copper,iron,lead,mercury,nickel,and zinc in freshwater fish:Assessing trophic transfer using stable isotope ratios ofδ^(15)N andδ^(13)C

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Journal of Environmental Sciences 2023年第6期128卷 250-257页

作者： Chester Lau X.chris Le Department of Chemistry Faculty of ScienceUniversity of AlbertaAlberta T6G 2G2Canada Division of Analytical and Environmental Toxicology Department of Laboratory Medicine and PathologyFaculty of Medicine and DentistryUniversity of AlbertaAlberta T6G 2G3Canada

Introduction The health benefits of consuming aquatic organisms are clear,given their high protein count,low saturated fats,and low cholesterol ***,in particular,contains valuable nutrients(e.g.,omega-3 polyunsaturated fats),vitamins,essential elements,and is therefore considered an important part of a balanced human *** is a major seafood producer,accounting for 58%of global production in 2018(Crona et al.,2020).China is the largest seafood consuming country in the world,with consumption rates steadily *** the 1978 Chinese economic reform,the amount of seafood consumed per capita in China increased from 5 kg per capita in 1980 to 41 kg in 2015(Zhang et al.,2021).By 2030,the overall amount of fish consumption will likely exceed the amount of fish production in China.

关键词： Aquatic environment Bioaccumulation Biomagnification Fish consumption Growth dilution effect Metal contamination Stable isotope ratio Trace elements Trophic levels

Fluorescence imaging of Cu(Ⅰ) in endoplasmic reticulum of live cells and tissue

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Science China Chemistry 2019年第7期62卷 887-888页

作者： Xiaowen Yan X. chris Le Key Laboratory of Spectrochemical Analysis and Instrumentation Ministry of Education Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Division of Analytical and Environmental Toxicology Department of Laboratory Medicine and Pathology Faculty of Medicine and Dentistry University of Alberta Edmonton AB T6G 2G3 Canada

Copper (Cu) is an essential element to living organisms. The redox activity of Cu gives rise to redox cycling reactions between Cu^2+ and Cu^+. Organisms harness this redox cap? ability for their biological functions by tightly regulating copper homeostasis in the processes of cellular uptake, intracellular transport, protein loading and storage [1].

关键词： endoplasmic reticulum Copper (Cu) living organisms

Highwall mining of thick,steeply dipping coal–A case study in geotechnical design and recovery optimization

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International Journal of Mining Science and Technology 2019年第5期29卷 777-780页

作者： chris Ross David Conover Jake Baine Agapito Associate Inc.GoldenCOUSA Westmoreland Kemmerer LLC Kemmerer MineKemmererUSA

Highwall mining of thick(up to 30.48 m)steeply dipping(20°or more)coal seams provides many chal lenges,both geotechnically and operationally,as seam dips near or in excess of highwall mining machine capabilities are *** coal recovery while maintaining highwall stability requires innovative techniques with regard to web and barrier pillar layout,depth of penetration,and choice of mining horizon within the *** of highwall mining slopes,openings,and pillarsare typically analyzed using the ARMPS-HWM program,as well as LAMODEL,UDEC and SLOPE/W *** stability can be maintained,and highwall mining production optimized by applying design cri-teria in creative ways,including alternating miner penetration depths and initiating mining of thick seams toward the bottom of the *** mining of thick,steeply dipping coal requires careful planning and execution,including close cooperation between geotechnical design engineers,the mining company,and the highwall mining *** paper describes the application of creative design techniques to a specific pit arrangement at the Westmoreland Kemmerer Mine,Kemmerer,*** mining was accomplished by UGM ADDCAR Systems,LLC on a contract basis.

关键词： mining thick optimization

Hybrid Short-term Load Forecasting Method Based on Empirical Wavelet Transform and Bidirectional Long Short-term Memory Neural Networks

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1216-1228页

作者： Xiaoyu Zhang Stefanie Kuenzel Nicolo Colombo chris Watkins School of Artificial Intelligence Anhui UniversityHefei 230601China Department of Electronic Engineering Royal HollowayUniversity of LondonEgham HillEgham TW20 OEXUK Department of Computer Science Royal HollowayUniversity of LondonEgham HillEgham TW200EXUK

Accurate short-term load forecasting is essential to modern power systems and smart grids. The utility can better implement demand-side management and operate power system stably with a reliable load forecasting system. The load demand contains a variety of different load components, and different loads operate with different frequencies. The conventional load forecasting methods, e.g., linear regression(LR), auto-regressive integrated moving average(ARIMA), deep neural network, ignore the frequency domain and can only use time-domain load demand as inputs. To make full use of both time-domain and frequency-domain features of the load demand, a load forecasting method based on hybrid empirical wavelet transform(EWT) and deep neural network is proposed in this paper. The proposed method first filters noises via wavelet-based denoising technique, and then decomposes the original load demand into several sub-layers to show the frequency features while the time-domain information is preserved as well. Then, a bidirectional long short-term memory(LSTM) method is trained for each sub-layer independently. In order to better tune the hyperparameters, a Bayesian hyperparameter optimization(BHO) algorithm is adopted in this paper. Three case studies are designed to evaluate the performance of the proposed *** the results, it is found that the proposed method improves the prediction accuracy compared with other load forecasting method.

关键词： Load forecasting empirical wavelet transform(EWT) recurrent neural network data denoising Bayesian hyperparameter optimization(BHO)

Influence of reference states on Jupiter’s dynamo simulations

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Earth and Planetary Physics 2021年第4期5卷 305-313页

作者： LongHui Yuan YuFeng Lin chris AJones Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China Department of Earth Sciences The University of Hong KongPokfulam RoadHong KongChina School of Mathematics University of LeedsLeedsLS29JTUnited Kingdom

Jupiter’s magnetic field is thought to be generated in its deep metallic hydrogen region through dynamo action,yet the detailed dynamic process remains poorly *** simulations have produced Jupiter-like magnetic fields,albeit using different control parameters and reference state *** this study,we investigate the influence of different reference state models,based on ab initio calculations and based on the polytropic equation of *** doing so,we perform five anelastic convection dynamo simulations that can be divided into two *** each group,different reference states are used while other control parameters and conditions are set to be *** find the reference state model can be very influential for the simulations in which buoyancy force is dominant over the Lorentz *** this regime,different dynamical outcomes can be attributed to the effective buoyancy force resulting from different reference *** simulations in which the Lorentz force is dominant over the buoyancy force,however,dynamo actions tend to be insensitive to different reference state *** Jupiter’s dynamo is in a strong field regime,i.e.,the Lorentz force plays a dominant role,our numerical results suggest that Jupiter’s internal reference state,which remains poorly constrained,may play a minor role in the dynamo process of the planet.

关键词： giant planets planetary dynamo Jupiter’s magnetic field internal structure

SCENIC HUDSON'S LONG DOCK PARK CULTIVATING RESILIENCE:TRANSFORMING A POST-INDUSTRIAL BROWNFIELD INTO A FUNCTIONAL ECOSYSTEM

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Journal of Green Building 2016年第3期11卷 55-77页

作者： chris Moyles Timothy Craul Reed Hilderbrand LLC Craul Land Scientists Inc

Scenic Hudson’s Long Dock Park is a resilient living work of art and a vibrant community asset for the Hudson River Valley.A 23-acre peninsula on the east side of the Hudson at Beacon,New York,the site includes the Peter *** Park and the Klara Sauer Hudson River *** decades in the making,beginning in 1997,it took a decade to plan and remediate,and,by its completion in early 2017,it will have taken just as long to build and *** 1997,nonprofit Scenic Hudson,the largest environmental and land preservation group focused on the Hudson River Valley,started assembling the different ownership parcels of the Long Dock *** 1999 to 2003,they engaged the Beacon community through a series of community meetings and workshops to articulate its vision for its waterfront and cleanup of the site *** 2003 to 2007,the design team developed the architectural and site program for the project,restoration measures,and its physical expression with the *** with the City and the New York State Department of Environmental Conservation(NYSDEC),the project completed the State Environmental Quality Review Act(SEQR)process,filing a Draft Environmental Impact Statement(DEIS)and received approval of the final EIS ensuring that there was significant environmental,social,or economic *** NYSDEC and the *** Corps of Engineers(USACE)were also directly involved in oversight of the brownfield remediation and work within the Hudson River and site *** the SEQR process complete and approval of a mitigation plan from the USACE,the team worked with the City of Beacon to complete the site plan application process for *** mandate was clear from the start-build resilience,but realize it *** project’s first phase,opened in 2009,included additional remediation and removal of contaminated soils,removal of invasive species,stabilization of the south shoreline,a test plot for different materials,a wetland boardwalk and interior pat

关键词： waterfront park brownfield remediation sustainable SITES designing soil for the urban environment stormwater treatment invasive plant species

Investigation of the heat distribution in dry friction systems during fade and recovery using fiber-optic sensing and infrared technology

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Friction 2022年第3期10卷 422-435页

作者： Albert ALBERS Thomas KLOTZ chris FINK Sascha OTT IPEK–Institute of Product Engineering Karlsruhe Institute of TechnologyBaden Wurttemberg 76131Germany

The design of dry-running friction pairings and systems determines not only their installation space and costs,but also their reliability under critical load conditions,for example in emergencies,in the case of faults,and in the event of *** knowledge of the contact pattern is highly important for the development of clutches and brakes,the contact-related measurement of the temperature of these systems has not yet been solved in a satisfactory *** its importance,the temperature distribution has only been measured in a few ***,temperature measurements of complete clutches and brakes are carried out using thermocouples *** this study,a new innovative test setup is *** setup is able to measure the heat distribution of the lining and the steel disk of a brake with high spatial resolution by means of fiber optic sensing technology and *** a novelty,it enables measurement of the heat distribution and allows to correlate it with the fade and recovery *** to the expectations,the contact pattern is heterogeneous in circumferential *** causes are discussed using simulation *** with surface analysis,the new setup contributes to the investigation of the causes of fade and recovery.

关键词： dry-running clutch and brake fade and recovery high-resolution spatial temperature distribution measurement

Optimizing control of coal flotation by neuro-immune algorithm

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International Journal of Mining Science and Technology 2013年第3期23卷 407-413页

作者： Yang Xiaoping chris Aldrich School of Chemical & Environmental Engineering China University of Mining & Technology Western Australian School of Mines Curtin University of Technology

Coal flotation is widely used to separate commercially valuable coal from the fine ore slurry, and is an industrial process with nonlinear, multivariable, time-varying and long time-delay characteristics. The online detection of ash content of products as the operation performance evaluation in the flotation system is extraordinarily difficult because of the low solid content and numerous micro-bubbles in the slurry. Moreover, it is time-consuming by manual analysis. Consequently, the optimal separation is not usually maintained. A novel technique, called the neuro-immune algorithm (NIA) inspired by the biological nervous and immune systems, is presented in this paper for predicting the ash content of clean coal and performing the optimizing control to the coal flotation system. The proposed algorithm integrates the deeply-studied artificial neural network (ANN) and the developing artificial immune system (AIS). A two-layer back-propagation network was constructed offline based on the historical process data under the best system situation, using five parameters: the flow and the density of raw slurry, the input flows of water, the kerosene and the GF oil, as the inputs and the ash content of clean coal as the output. The immune cell of AIS is made up of six parameters above as the antigen. The cytokine based clone selection algorithm is used to produce the relative antibody. The detailed computation procedures about the hybrid neuro-immune algorithm are minutely discussed. The ash content of clean coal was predicted by NIA using the practical process data s: (308.6 174.7 146.1 43.6 4.0 9.4), and the absolute difference between the actual and computed ash content values was 0.0967%. The optimizing control on NIA was simulated considering two different situations where the ash content of clean coal was controlled downward from 10.00% or upward from 9.20% predicted by ANN to the target value 9.50%. The results indicate that the target ash content and the value of cont

关键词： Optimizing control Neuro-immune algorithm Neural networks Immune system Coal flotation