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EXPErIMENTAL rESEArCH oF EQUILIBrIUM AND NoNEQUILIBrIUM DYNAMIC ADSorPTIoN oF Cd^(++) IN SoIL--EFFECT oF DIFFErENT ACIDITIES AND SATUrATIoN

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Journal of Hydrodynamics 1992年第2期4卷 1-9页

作者： Huang Jun-qi Xie Xi-na Bai Yiao-dong, Institute of Porous Flow and Fluid Mechanics, NPCC and Academia Sinica, P.o.BoX 44, Langfang Hebei 102801, P.r.China

This paper studies water and solute transport in soil. It mainly deals with the adsorption behavior of heavy metal Cd^(++) in soil at different P^H values and the dynamic charac- ters of adsorption process in unsaturated state. Through theoretical analysis and experimental re- search, the adsorption isotherm and the equations of dynamic adsorption in saturated and unsatu- rated states are proposed.

关键词： soil adsorption dynamics unsaturation experiment

Health Awareness: A Significant Factor in Chronic Diseases Prevention and Access to Care

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Journal of Biosciences and Medicines 2023年第2期11卷 64-79页

作者： raymond o. Chimezie Liberty University Lynchburg Virginia USA

Health literacy and awareness are essential strategies in promoting global health and improving access to care. While seen as an essential tool for promoting population health awareness to improve early detection and treatment of chronic diseases, it is yet to be emphasized in most African countries. Health literacy is an essential practice to promote chronic disease prevention and reduce the growing threat to population health. Incidences and mortalities from chronic diseases commonly arise from limited knowledge of the causative risk factors and access to health facilities. Without knowledge about causes, health impacts, and available health services, people continue to indulge in the habits that worsen their health conditions and fail to access care timely. By using health literacy and awareness as a tool for chronic disease prevention, healthcare professionals will develop strategic health awareness programs that fit the socio-demographics of the population they serve. This article explored the significant role health awareness occupies in individual and community health prevention through health promotion and education. It reviewed the concept and dimensions of chronic disease prevention, cultural beliefs and impact on chronic diseases, gaps created by low health literacy, and the significance of health literacy in disease prevention and health promotion. Furthermore, it recommends that health systems and local communities form partnerships to address common and emerging health problems, and health systems should be properly funded.

关键词： Health Awareness Health Literacy Chronic Disease Management Preventive Health Health Education

Design and Implementation of remotely Controlled Vehicle Anti-Theft System via GSM Network

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Wireless Sensor Network 2013年第8期5卷 151-157页

作者： T. T. oladimeji P. o. oshevire o. o. omitola o. E. Adedokun Department of Computer Engineering Afe Babalola University Ado-Ekiti Nigeria Department of Electrical/Electronics Engineering Afe Babalola University Ado-Ekiti Nigeria Federal Ministry of Communication Abuja Nigeria

The purpose of this paper is to build a secured and reliable vehicle anti-theft system which will have the ability to access the vehicle subsystems from a remote location where there is GSM network. And also, the design method involves the interfacing of GSM/GPrS modem module with the vehicle ignition subsystem, and the test result shows that it performs some control actions on the vehicle subsystems from a mobile phone, having taken the advantage of the wide coverage area of some GSM networks. Hence the topic is “remotely Controlled Vehicle Anti-theft System via GSM Network”.

关键词： CoDEC—Coder and Decoder GSM—Global System for Mobile Telecommunication GPrS—General Packet radio Service MoDEM—Modulator and Demodulator SMS—Short Messaging Service

Biological nutrient removal by internal circulation upflow sludge blanket reactor after landfill leachate pretreatment

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Journal of Environmental Sciences 2013年第10期25卷 2130-2137页

作者： Alkhafaji r.Abood Jianguo Bao Zaidun N.Abudi State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Thi Qar University Al-Mustansiryiah University College of Engineering

The removal of biological nutrient from mature landfill leachate with a high nitrogen load by an internal circulation upflow sludge blanket （ICUSB） reactor was studied. The reactor is a set of anaerobic-anoxic-aerobic （A^2/o） bioreactors, developed on the basis of an expended granular sludge blanket （EGSB）, granular sequencing batch reactor （GSBr） and intermittent cycle extended aeration system （ICEAS）. Leachate was subjected to stripping by agitation process and poly ferric sulfate coagulation as a pretreatment process, in order to reduce both ammonia toxicity to microorganisms and the organic contents. The reactor was operated under three different operating systems, consisting of recycling sludge with air （A^2/o）, recycling sludge without air （low oxygen） and a combination of both （A^2/o and low oxygen）. The lowest effluent nutrient levels were realised by the combined system of A^2/o and low oxygen, which resulted in effluent of chemical oxygen demand （CoD）, NH3-N and biological oxygen demand （BoD5） concentrations of 98.20, 13.50 and 22.50 mg/L. The optimal operating conditions for the efficient removal of biological nutrient using the ICUSB reactor were examined to evaluate the influence of the parameters on its performance. The results showed that average removal efflciencies of CoD and NH3- N of 96.49% and 99.39%, respectively were achieved under the condition of a hydraulic retention time of 12 hr, including 4 hr of pumping air into the reactor, with dissolved oxygen at an rate of 4 mg/L and an upflow velocity 2 m/hr. These combined processes were successfully employed and effectively decreased pollutant loading.

关键词： landfill leachate anaerobic-anoxic-aerobic (A^2/o) bioreactor biological nutrient removal combined treatment

Impact of Clocking on the Aero-Thermodynamics of a Second Stator tested in a one and a Half Stage HP Turbine

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Journal of Thermal Science 2008年第2期17卷 97-110页

作者： N.Billiard G.Paniagua r.Dénos Turbomachinery and Propulsion Department von Karman Institute for Fluid Dynamics

This paper focuses on the experimental investigation of the time-averaged and time-accurate aero- thermodynamics of a second stator tested in a 1.5 stage high-pressure turbine. The effect of clocking on aerodynamic and heat transfer are investigated. Tests are performed under engine representative conditions in the VKI compression tube CT3. The test program includes four different clocking positions, i.e. relative pitch-wise positions between the fh-st and the second stator. Probes located upstream and downstream of the second stator provide the thermodynamic conditions of the flow field. on the second stator airfoil, measurements are taken around the blade profile at 15, 50 and 85% span with pressure sensors and thin-film gauges. Both time-averaged and time-resolved aspects of the flow field are addressed. regarding the time-averaged results, clocking effects are mainly observed within the leading edge region of the second stator, the largest effects being observed at 15% span. The surface static pressure distribution is changed locally, hence affecting the overall airfoil performance. For one clocking position, the thermal load of the airfoil is noticeably reduced. Pressure fluctuations are attributed to the passage of the up- stream transonic rotor and its associated pressure gradients. The pattern of these fluctuations changes noticeably as a function of docking. The time-resolved variations of heat flux and static pressure are analyzed together showing that the major effect is due to a potential interaction. The time-resolved pressure distribution integrated along the second stator surface yields the unsteady forces on the vane. The magnitude of the unsteady force is very dependent on the clocking position.

关键词： transonic flow turbines stator clocking forces heat transfer.

Potential of asymmetrical Si/Ge and Ge/Si based hetero-junction transit time devices over homo-junction counterparts for generation of high power

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Journal of Semiconductors 2011年第11期32卷 24-30页

作者： Moumita Mukherjee Pravash r.Tripathy S.P.Pati Centre of Millimeter-Wave Semiconductor Devices and Systems Institute of Radio Physics and ElectronicsUniversity of Calcutta Puroshottam Institute of Engineering & Technology RourkelaOdishaIndiaSambalpur University AICTE Emeritus Professor NISTPelur HillsBerhampurOdishaIndia

Static and dynamic properties of both complementary n-Ge/p-Si and p-Ge/n-Si hetero-junction DoubleDrift IMPATT diodes have been investigated by an advanced and realistic computer simulation technique, devel- oped by the authors, for operation in the Ka-, V- and W-band frequencies. The results are further compared with corresponding Si and Ge homo-junction devices. The study shows high values of device efficiency, such as 23%, 22% and 21.5%, for n-Ge/p-Si IMPATTs at the Ka, V and W bands, respectively. The peak device negative con- ductances for n-Si/p-Ge and n-Ge/p-Si hetero-junction devices found to be 50.7× 10^6 S/m^2 and 71.3× 106 S/m^2, which are -3-4 times better than their Si and Ge counterparts at the V-band. The computed values of rF powerdensity for n-Ge/p-Si hetero-junction IMPATTs are 1.0 ×10^9, 1.1 × 10^9 and 1.4× 10^9 W/m^2, respectively, for Ka-, V- and W-band operation, which can be observed to be the highest when compared with Si, Ge and n-Si/p-Ge devices. Both of the hetero-junctions, especially the n-Ge/p-Si hetero-junction diode, can thus become a superior rF-power generator over a wide range of frequencies. The present study will help the device engineers to choose a suitable material pair for the development of high-power MM-wave IMPATT for applications in the civil and defense-related arena.

关键词： admittance characteristics double drift diode high-power IMPATT high-efficiency MM-wave de- vice Si/Ge and Ge/Si material systems

国际心脏病联合会和世界卫生组织(ISFC/WHo)特别工作组关于M型超声心动图测量标准化的报告

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国际心血管病杂志 1985年第1期 13-15页

作者： o’rourke r A 徐大地

M型超声心动图是一种非侵入性技术,用以对心室腔的大小、心室壁的厚度、心室壁的运动、大血管内径和瓣膜运动作线性测量。美国超声心动图学会和欧洲心脏病学会超声心动图小组已对M型超声心动图的测量部位和方法的标准化提出建议。ISFC/... 详细信息

M型超声心动图是一种非侵入性技术,用以对心室腔的大小、心室壁的厚度、心室壁的运动、大血管内径和瓣膜运动作线性测量。美国超声心动图学会和欧洲心脏病学会超声心动图小组已对M型超声心动图的测量部位和方法的标准化提出建议。ISFC/WHo特别工作组根据两者的报道并吸取了国际M型超声心动图专家的意见,在M型超声心动图的测量方法及其应用方面取得统一意见。本文详细阐述了一些常用的M型超声心动图测量,至于另一些较少用的定量数据只是扼要地提一下。必须强调,M型超声心动图测量的准确性与图象描记的技术同样重要。准确的测量

关键词：超声心动图超声波诊断室间隔厚后壁厚度工作组

Leaching of rare Earth elements from an Illinois basin coal source

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Journal of rare Earths 2019年第3期37卷 312-321页

作者： X.Yang J.Werner r.Q.Honaker Department of Mining Engineering University of Kentucky

The existence of rare earth elements(rEEs) in coal sources at elevated concentrations has been the focus of several studies over the past decade. However, limited research has been conducted on methods to recover and refine the rEEs. This paper reports the results of a detailed study into the potential of selectively recovering rEEs in an Illinois basin coal source by leaching. Leaching characteristics are obtained for several segments obtained from a core sample as well as three different reject materials collected at a coal processing plant. Using a 1.2 mol/L sulfuric acid solution at 75 ℃,over 60% rEE recovery is achieved from the direct floor and an inner parting material as well as the coal-rich core segments that are pretreated by low-temperature plasma oxidation to obtain access to the microdispersed mineral matter. In the leachable parting material, fluorapatite is detected by XrD analysis,which is one of the more soluble phosphate minerals with a documented association with rEEs. For the three plant reject samples, the leaching recovery values obtained for the heavy rEEs are higher than those obtained for the light rEEs under the standard leaching conditions and when 0.1 mol/L(NH_4)_2So_4 was used to extract rEEs by an ion exchange mechanism. Thermal activation by roasting or chemical activation by pretreatment using 8 mol/L NaoH solution increases the total rEE recovery with significantly higher gains obtained for the light rEEs. Leaching kinetics are relatively fast within the first 2 h and then slow to provide relatively low overall recovery values under the standard test conditions for the coarse and fine reject samples. However, significantly higher recovery values are realized when treating mixed-phase(middling) particles existing within the coarse reject material.

关键词： Leaching Coal Thermal activation Chemical activation rare earth elements

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控制猪的体内寄生虫

国外畜牧学（猪与禽） 2012年第12期32卷 65-66页

作者：陶莉 r.o.Myer 玛丽安娜农业研究和教育中心

据估计，猪的体内寄生虫（蠕虫）每年可造成美国2．5亿美元的经济损失，但它们并未被认为是致猪死亡的原因。体内寄生虫掠夺猪的必需养分、损伤重要器官，从而使猪变得衰弱。严重感染寄生虫的猪更易患有各种疾病，如腹泻和肺炎。由此产... 详细信息

据估计，猪的体内寄生虫（蠕虫）每年可造成美国2．5亿美元的经济损失，但它们并未被认为是致猪死亡的原因。体内寄生虫掠夺猪的必需养分、损伤重要器官，从而使猪变得衰弱。严重感染寄生虫的猪更易患有各种疾病，如腹泻和肺炎。由此产生的疾病和衰弱是造成经济损失的主要因素。养猪生产者应了解常见的猪体内寄生虫和它们的预防、控制办法。

关键词：体内寄生虫养猪控制经济损失生产者疾病蠕虫死亡