This report is a Toxicology Assessment for six per- and polyfluoroalkyl substances (PFAS)-free aqueous film forming foam (AFFF) products under consideration for use by the Department of Defense. This phased assessment...
详细信息
This report is a Toxicology Assessment for six per- and polyfluoroalkyl substances (PFAS)-free aqueous film forming foam (AFFF) products under consideration for use by the Department of Defense. This phased assessment is in active testing and therefore this report represents the status of information available as of April 2022.
The Federal Highway Administration’s (FHWA) new Cooperative Driving Automation (CDA) program has put a spotlight on the entire transportation system and how infrastructure can be leveraged to support mobility and saf...
详细信息
The Federal Highway Administration’s (FHWA) new Cooperative Driving Automation (CDA) program has put a spotlight on the entire transportation system and how infrastructure can be leveraged to support mobility and safety. CDA is poised to transform our Nation’s roadways. This technology will improve the efficiency and safety of vehicles across the transportation system.
Soil Organic Carbon(SOC)is the most important indicator of soil health and determines long-term crop ***,we applied the Random Forest regression model to soil hyper-spectral data to determine the important spectral ba...
详细信息
Soil Organic Carbon(SOC)is the most important indicator of soil health and determines long-term crop ***,we applied the Random Forest regression model to soil hyper-spectral data to determine the important spectral bands and regions for SOC *** existing studies already identified specific wavelength bands that could be good indicators of ***,there is no hyperspectral-based method that is currently available to simulta-neously investigate these identified specific wavelength regions for *** help fill this gap,we developed the Perimeter-Area Soil Carbon Index(PASCI)that utilized optimal SOC spectral bands and then evaluated its robustness for SOC prediction and retrieval against other existing *** results of regression analysis between SOC and PASCI values showed a significant relationship(r2=0.76;p＜0.05).A significant statistical relationship(r2=0.73)was also observed between SOC and the sum *** results from this study have advanced our understanding of the optimal spectral bands for ***,the PASCI could be applied to hyperspectral and multispectral images to remotely quantify,predict,and map SOC.
Toughening by in-situ phase formation is highly desired for high-performance refractories, as it enhances their thermomechanical properties (e.g. thermal shock damage resistance). For this purpose, pseudobrookite and ...
详细信息
Spinal cord injury can be traumatic or non-traumatic in origin,with the latter rising in incidence and prevalence with the aging demographics of our *** r,as the global population ages,individuals with co-existent deg...
详细信息
Spinal cord injury can be traumatic or non-traumatic in origin,with the latter rising in incidence and prevalence with the aging demographics of our *** r,as the global population ages,individuals with co-existent degenerative spinal pathology comprise a growing number of traumatic spinal cord injury cases,especially involving the cervical spinal *** makes recovery and treatment approaches particula rly challenging as age and comorbidities may limit regenerative *** these reasons,it is critical to better understand the complex milieu of spinal cord injury lesion pathobiology and the ensuing inflammatory *** review discusses microglia-specific purinergic and cytokine signaling pathways,as well as microglial modulation of synaptic stability and plasticity after ***,we evaluate the role of astrocytes in neurotransmission and calcium signaling,as well as their border-forming response to neural *** the inflammatory and reparative roles of these cells have eluded our complete understanding and remain key therapeutic targets due to their extensive structural and functional roles in the nervous *** advances have shed light on the roles of glia in neurotransmission and reparative injury responses that will change how interventions are *** key processes and existing knowledge gaps will allow future research to effectively target these cells and harness their regenerative potential.
researchers continually demonstrated through published literature how LiDAR could create unparalleled measurements of ecosystem structure and forest *** are a number of studies conducted utilizing waveform LiDAR produ...
详细信息
researchers continually demonstrated through published literature how LiDAR could create unparalleled measurements of ecosystem structure and forest *** are a number of studies conducted utilizing waveform LiDAR products for terrestrial monitoring,but those that deal specifically with the assessment of space-borne waveform LiDAR for monitoring and modeling of phenology is very *** review highlights the waveform LiDAR system and looks into satellite sensors that could link waveform LiDAR and vegetation phenology,such as the proposed NASA’s Global Ecosystem Dynamics Investigation(GEDI)and the Japanese Experimental Module(JEM)-borne LiDAR sensor named MOLI(Multi-footprint Observation LIDAR and Imager).Further,this work examines the richness and utility of the waveform returns and proposes a spline-function-derived model that could be exploited for estimating the leaf-shooting *** new approach may be utilized for ecosystem-level phenological studies.
In this paper, Fluent software was used to simulate the proppant reflux law, and finite element method was used to study the stress of proppant particles at each part of a single fracture and the flow law of proppant ...
详细信息
Lamaidean oilfield is a sandstone oil reservoir with low porosity, low permeability and low abundance, with extremely broken structure, many faults, deep burial, poor physical properties and complicated oil-water rela...
详细信息
作者：
Yan, YonghengDevelopment Program Room
Geological Research Institute No. 6 Oil Production Plant Daqing Oilfield Heilongjiang province Daqing163100 China
Downhole oil-water separation technology (DOWS) is a new type of separation technology, which can improve efficiency, reduce energy consumption, and can solve the problem of high water cut oilfield development. At pre...
详细信息
With the development of oil and gas exploration and technology, China's oil and gas development has shifted from conventional reservoirs to low-permeability and difficult-to-utilize unconventional reservoirs, and ...
详细信息
暂无评论