Research on in-situ condition preserved coring and testing systems

As shallow resources are increasingly depleted,the mechanics'theory and testing technology of deep insitu rock has become urgent.Traditional coring technologies obtain rock samples without retaining the in-situ environmental conditions,leading to distortion of the measured parameters.Herein,a coring and testing systems retaining in-situ geological conditions is presented:the coring system that obtains in-situ rock samples,and the transfer and testing system that stores and analyzes the rocks under a reconstructed environment.The ICP-Coring system mainly consists of the pressure controller,active insulated core reactor and insulation layer and sealing film.The ultimate bearing strength of 100 MPa for pressurepreservation,temperature control accuracy of 0.97%for temperature-retained are realized.CH_(4)and CO permeability of the optimized sealing film are as low as 3.85 and 0.33 ppm/min.The average tensile elongation of the film is 152.4%and the light transmittance is reduced to 0%.Additionally,the pressure and steady-state temperature accuracy for reconstructing the in-situ environment of transfer and storage system up to 1%and±0.2 is achieved.The error recorded of the noncontact sensor ring made of lowdensity polymer is less than 6%than that of the contact test.The system can provide technical support for the deep in-situ rock mechanics research,improving deep resource acquisition capabilities and further clarifying deep-earth processes.

Repeat HIV Testing and Incident Rates among Individuals Attending Voluntary Counseling and Testing Clinics in Wuxi, China： A Retrospective Study

Objective We aimed to elucidate the rates of repeat HIV testing and incident HIV diagnosis, and baseline CD4^＋ T cell count among individuals attending HIV voluntary counseling and testing （VCT） clinics in Wuxi, China. Methods A repeat HIV testing within 12 months was recorded if individuals had their first test with negative results, during 2013-2014 and retested within 12 months. An incident HIV diagnosis was recorded if individuals had their first test with negative results, during 2013-2015 and had a subsequent positive result at any point by the end of 2015. Data on HIV testing and diagnosis among individuals attending 32 VCT clinics from 2013 to 2015 and HIV diagnosis from other clinical services in Wuxi, China, were retrieved. A multivariate logistic regression model was used to analyze factors associated with repeat HIV testing. Cox regression was used to evaluate factors associated with incident HIV diagnosis. Results From 2013 to 2014, 11,504 individuals tested HIV negative at their first recorded test, with 655 （5.7%） retesting within 12 months. Higher repeat HIV testing within 12 months was associated with male gender [adjusted odds ratio （a OR） = 1.7, 95% confidence interval （CI）： 1.4-2.2], risk behaviors [commercial heterosexual behaviors （a OR = 1.4, CI： 1.1-1.6）, male-male sexual behaviors （a OR = 3.7, CI： 2.7-4.9）], injection drug use （a OR = 9.9, CI： 6.5-15.1）, and having taken HIV tests previously （a OR = 2.0, CI： 1.6-2.4）. From 2013 to 2015, 1,088 individuals tested negative on HIV test at their visit and at ≥ 2 subsequent tests; of them 30 had incident HIV diagnosis. The overall rate of incident HIV diagnosis among all VCT individuals was 1.6 （95% CI： 1.1-2.1） per 100 person-years. Incident HIV diagnosis was associated with male gender [adjusted hazard ratio （a HR） = 8.5, 95% CI： 1.9-38.1], attending hospital-based VCT clinics （a HR = 7.8, 95% CI： 1.1-58.3）, and male-male sexual behavior （a HR = 8.4, 95% CI： 1.5-46.7）. Individuals diagnosed at VCT clinics had higher CD4＋ T cell count compared with those diagnosed at other clinical services （median 407 vs. 326 copies/mm3, P = 0.003）. Conclusion VCT individuals in Wuxi, China, had a low repeat HIV testing rate and high HIV incidence. VCT-clinic-based interventions aimed at increasing repeat HIV testing are needed to detect more cases at an earlier stage, especially among individuals at high risk for HIV infection such as men who have sex with men.

Machines and Testing Equipment

National Quality Supervision ＆ Inspection Center for Refractories Business scope： Selective examination for national quality supervision; Identification of production license; Arbitration inspection and technical achievements evaluation; Commodities inspection and otherquality inspections .

Uncertainties of landslide susceptibility prediction:Influences of different spatial resolutions,machine learning models and proportions of training and testing dataset

This study aims to reveal the impacts of three important uncertainty issues in landslide susceptibility prediction(LSP),namely the spatial resolution,proportion of model training and testing datasets and selection of machine learning models.Taking Yanchang County of China as example,the landslide inventory and 12 important conditioning factors were acquired.The frequency ratios of each conditioning factor were calculated under five spatial resolutions(15,30,60,90 and 120 m).Landslide and non-landslide samples obtained under each spatial resolution were further divided into five proportions of training and testing datasets(9:1,8:2,7:3,6:4 and 5:5),and four typical machine learning models were applied for LSP modelling.The results demonstrated that different spatial resolution and training and testing dataset proportions induce basically similar influences on the modeling uncertainty.With a decrease in the spatial resolution from 15 m to 120 m and a change in the proportions of the training and testing datasets from 9:1 to 5:5,the modelling accuracy gradually decreased,while the mean values of predicted landslide susceptibility indexes increased and their standard deviations decreased.The sensitivities of the three uncertainty issues to LSP modeling were,in order,the spatial resolution,the choice of machine learning model and the proportions of training/testing datasets.

Low Level of Hepatitis B Surface Antigen Screening in a Tertiary Health Facility in Nigeria 2000-2014: Imperative for Provider Initiated Testing and Counselling for Hepatitis B Virus?

Introduction: Viral hepatitis is a major public health challenge that requires an urgent response. Reducing mortality requires major scale-up in prevention, testing and treatment access;coverage in HBV vaccination, testing and treatment is low and must accelerate massively to achieve the 2030 targets. Less than 1% of HBV-infected individuals are diagnosed in Sub-Sahara Africa, despite the availability of rapid tests with good diagnostic accuracy. Materials and Methods: This was retrospective cross sectional study conducted in Federal Teaching Hospital Gombe, in North East Nigeria. All children and adults who presented to the out-patient departments, and those that were admitted irrespective of their HIV and or Hepatitis C virus status and had Hepatitis B and/or Hepatitis B envelope antigen test were conducted between 2000 to 2015. All children and adults were tested using the Hospital standard for Hepatitis B surface antigen test strip. Results: Between 2000 and 2014, 739,456 children and adults were admitted and reviewed in the outpatient units of the Federal Teaching Hospital Gombe;there were 685,552 adults and 53,904 children. Children constituted 7.3% (53,904/739,456) of admissions and outpatient consultations. 2.8% (210/7570), 3.3% (773/23,783), 3.6% (1145/32,142), 5.2% (1694/33,043), 3.3% (986/29,216), 1.9% (661/3321), 0.1% (53/41,626), 0.2% (113/46,634), 2.6% (1418/54,423), 5.4% (3717/69,696), 3.7% (2332/62,086), 3.5% (3241/90,623), 3.2% (2881/89,398), 3.8% (2428/62,687), 2.8% (1835/63,208) of children and adults were tested for HBsAg in 2000, 2001, 20002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 and 2014 respectively. 23,487 children and adults were tested for HBsAg with a cumulative testing rate of 3%. Overall 4465/23,487 children and adults were seropositive for HBsAg giving a cumulative prevalence of 19%. Conclusion: HBV screening in our health facility is very low. Massive scale up in awareness and HBV vaccination are required. Provider initiated testing and counseling for HBV in health facilities needs support for implementation in Health Facilities in Sub Saharan Africa.

Survey on AIDS related knowledge and attitude among married people of childbearing age in China

Objective:To learn about the current circumstances surrounding AIDS related knowledge,attitudes and relevant influential factors,and to provide recommendations for HIV/AIDS preven-tion and control.Methods:A cross sectional study was designed by the cluster sampling method,and a self-administered,closed,and anonymous questionnaire was administered.There were a total of 4,800 married people of childbearing age,from six counties,during the period November throughDecember,2003.Results:There were 4,693 valid questionnaires and the validity rate was 97.78%.The gen-eral correct rate of AIDS knowledge of the respondents was 63.60%.Factors such as sex,age,place of registered permanent residence and different areas had influence on the level of AIDSknowledge.Respondents knew more about AIDS transmission related knowledge than non-trans-mission related knowledge.Only 30.6% of respondents had heard about volunteer counseling andtesting(VCT)of AIDS,and just 8.5% of them thought that they had the possibility of being in-fected with HIV/AIDS,64.5% of participants were afraid of AIDS,66.5% of them thought thatHIV positive people should be quarantined,74.1% of them held that HIV positive people shouldbe forbidden to go to public places,and they would not like to have dinner(68.8%),shakehands(67.8%),or work(63.4%)with HIV positive people.Respondents of different sex,reg-istered permanent residence,education and living places had different attitudes towards HIV/AIDS.Conclusion:The AIDS knowledge level of respondents is below the goal of 75% up to 2005brought forward by National AIDS Office of China.It is very important to strengthen the Infor-mation,Education,Communication(IEC)on AIDS non-transmission related knowledge amongmarried people of childbearing age,especially those who are younger,lower educated and female.Furthermore,the knowledge about VCT should be publicized.More than half of the respondentshave negative attitudes towards AIDS patients.

上海区级疾病预防控制机构现代化建设思考与展望

本文根据国家关于推动疾病预防控制事业高质量发展指导意见的要求,结合上海市疾病预防控制体系现代化建设进展与经验,总结了近年来上海区级疾控机构的建设成效,并结合当前超大城市疾病预防控制各项任务需求与下阶段疾控事业发展目标要求,梳理作为直辖市和超大城市基层疾控机构建设发展所面临的紧迫问题。在监测预警、检验检测、应急处置、信息化建设、学科人才发展和区域协同联动等方面对加强区级疾控机构建设,推进区域疾控体系同质化、一体化发展提出若干思考和建议,为下阶段做好推动落实疾病预防控制高质量发展各项任务,以及各地相关政策规划的制定提供参考。

上海市公共卫生监督技术服务机构消毒产品检验能力现况调查

目的 掌握本市公共卫生监督技术服务机构消毒产品检验能力现状,为完善对该类机构的指导与管理提供科学依据。方法 2021年8—11月,采用信息查询、问卷和现场调查的方法对上海市公共卫生监督技术服务机构中具备消毒产品领域资质的检验检测机构进行调查,描述和分析机构基本情况、专业技术人员、业务能力和业务开展等。结果 调查机构34家,其中企业制机构18家(52.9%)、事业制机构16家(47.1%)。企业制机构和事业制机构在从业人数、实验室面积和专业技术人员的分布上均存在明显差异(P <0.05)。72.2%的企业制机构为小微企业[5.6%微型企业(<10人),66.6%小型企业(10~<100人)],事业制机构从业人数均在100人以上;83.3%的企业制机构实验室面积为2 000 m2以下,87.5%的事业制机构为2 000 m2以上;企业制机构的专业技术人员年龄结构更年轻,学历相对较低,毕业于卫生相关专业的较少,无职称人员占比较高。消毒产品检验能力较为全面的机构占5.9%,各机构检验能力数(以方法计)7~344项,85.3%的机构检验能力数少于30项,只有5.9%的机构能力数达到100项以上。55.9%的机构消毒产品检验领域年业务额为0,41.2%的机构该领域占年总业务额不超过5.0%,2020年较2019年报告量呈明显增加。结论 本市第三方机构在消毒产品检验能力储备、人员能力等方面有待进一步提升,应加强技术能力储备、优化技术人才培养、拓展消毒产品业务领域。建议相关部门加强对机构的指导和引导,进一步加强质量控制机构管理协调职能,推动公共卫生监督技术服务机构健康发展。

Improved Soil Quality Prediction Model Using Deep Learning for Smart Agriculture Systems

Soil is the major source of infinite lives on Earth and the quality of soil plays significant role on Agriculture practices all around.Hence,the evaluation of soil quality is very important for determining the amount of nutrients that the soil require for proper yield.In present decade,the application of deep learning models in many fields of research has created greater impact.The increasing soil data availability of soil data there is a greater demand for the remotely avail open source model,leads to the incorporation of deep learning method to predict the soil quality.With that concern,this paper proposes a novel model called Improved Soil Quality Prediction Model using Deep Learning(ISQP-DL).The work considers the chemical,physical and biological factors of soil in particular area to estimate the soil quality.Firstly,pH rating of soil samples has been collected from the soil testing laboratory from which the acidic range has been categorized through soil test and the same data has been taken as input to the Deep Neural Network Regression(DNNR)model.Secondly,soil nutrient data has been given as second input to the DNNR model.By utilizing this data set,the DNNR method is used to evaluate the fertility rate by which the soil quality has been estimated.For training and testing,the model uses Deep Neural Network Regression(DNNR),by utilizing the dataset.The results show that the proposed model is effective for SQP(Soil Quality Prediction Model)with efficient good fitting and generality is enhanced with input features with higher rate of classification accuracy.The results show that the proposed model achieves 96.7%of accuracy rate compared with existing models.

Model eyes with curved multilayer structure for the axial resolution evaluation of an ophthalmic optical coherence tomography device

Optical coherence tomography(OCT)has been widely applied to the diagnosis of eye diseasesduring the past two decades.However,valid evaluation methods are stil not available for theclinical OCT devices.In order to assess the axial resolution of the OCT system,standard modeleyes with micro-scale multilayer structure have been designed and manufactured in this study.Mimicking a natural human eye,proper Titanium dioxide(TiO_(2))materials of particles withdifferent concentrations were selected by testing the scattering coefficient of PDMS phantoms.The artificial retinas with multilayer films were fabricated with the thicknesses from 9.5 to 30 micrometers using spin coating technology,Subsequently,standard OCT model eyes were ac-complished by embedding the retina phantoms into the artificial frames of eyes.For ease ofmeasurement processing,a series of model eyes were prepared,and each contained flms withthree kinds of thicknesses.Considering the traceability and accuracy of the key parameters of the standard model eyes,the thicknesses of multilayer structures were verfed using ThicknessMonitoring System.Through the experiment with three different OCT devices,it demonstratedthe model eyes fabricated in this study can provide an effective evaluation method for the axialresolution of an ophthalmic OCT device.

Adaptive modification of turbofan engine nonlinear model based on LSTM neural networks and hybrid optimization method

An accurate and reliable turbofan engine model which can describe its dynamic behavior within the full flight envelop and lifecycle plays a critical role in performance optimization, controller design and fault diagnosis. However, due to the performance differences caused by the tolerance of engine manufacturing and assembly, and performance degradation during continuously stringent environmental regulations, the model accuracy is severely reduced. In this paper, an adaptive modification method of turbofan engine nonlinear Component-Llevel Model(CLM) based on Long Short-Term Memory(LSTM) Neural Network(NN) and hybrid optimization algorithm is pro-posed. First, a dynamic compensator with a combined LSTM NN architecture is constructed to compensate for the initial error between the experimental data and CLM of a turbofan engine under health condition. Then, a sensitivity analysis approach based on the entropy coefficient and technique for order preference by similarity to an ideal solution integrated evaluation is developed to choose the unmeasurable health parameters to be adjusted. Finally, a parallel hybrid optimization algorithm is developed to complete the adaptive model modification when the performance degrades. The proposed method is verified on a military low-bypass twin-spool turbofan engine, and the experimental results show the effectiveness of the proposed method.

Video information recovery from EM leakage of computers based on storage oscilloscope

A hardware platform using broadband antenna,oscilloscope,and spectrum analyzer is designed to receive radio frequency(RF)signals from electromagnetic radiation leakage of computers in the office environment.The process of receiving and the processing techniques have also been given.Then,the software radio-based computing models and software algorithms are proposed to demodulate and decode the RF signals.An experimental result shows that the text information can be recovered from electromagnetic(EM)leakage wave of computer by this interception system.This architecture not only reduces the cost of the system’s hardware but also makes interception more flexible.The innovation points of this paper are recovering the video information in EM leakage wave of computers in an ordinary office environment based on public equipments and proposing the process of receiving processing techniques that only use the software radiobased computing models and software algorithms.

Concentration Inequalities for Statistical Inference

This paper gives a review of concentration inequalities which are widely employed in non-asymptotical analyses of mathematical statistics in awide range of settings,fromdistribution-free to distribution-dependent,from sub-Gaussian to sub-exponential,sub-Gamma,and sub-Weibull random variables,and from the mean to the maximum concentration.This review provides results in these settings with some fresh new results.Given the increasing popularity of high-dimensional data and inference,results in the context of high-dimensional linear and Poisson regressions are also provided.We aim to illustrate the concentration inequalities with known constants and to improve existing bounds with sharper constants.