Moving web instability caused by the bending deflection of the support idle roller

The moving web is transported through a lot of rollers in the roll to roll process machines. These rollers are usually driven rollers, dancer rollers and idle rollers. The number of the idle roller is the largest in the roll to roll process machines. The kind of roller is a thin and long part. The bending deflection can be produced by the own gravity and the web tension. The influences on the deflection of the idle rollers by the web tension, gravity, shoulder length and wall thickness are analyzed. The investigation is focused on the dynamics of the idle roller and the web stability. The relationships between the roller dynamic and the speed and tension of the web are developed. The effect on the instability by the diameter of the idle roller, the length of the idle roller, the roller wall thickness, the surface properties of the roller and the web are discussed. The best parameter combinations of the web and roller are given. The results show that the guide rollers dynamic characteristics have a direct impact on the web motion stability

Current management of intracerebral haemorrhage in China: a national, multi-centre, hospital register study

<p>Abstract</p> <p>Background</p> <p>We aimed to examine current practice of the management and secondary prevention of intracerebral haemorrhage (ICH) in China where the disease is more common than in Western populations.</p> <p>Methods</p> <p>Data on baseline characteristics, management in-hospital and post-stroke, and outcome of ICH patients are from the ChinaQUEST (QUality Evaluation of Stroke Care and Treatment) study, a multi-centre, prospective, 62 hospital registry in China during 2006-07.</p> <p>Results</p> <p>Nearly all ICH patients (n = 1572) received an intravenous haemodiluting agent such as mannitol (96%) or a neuroprotectant (72%), and there was high use of intravenous traditional Chinese medicine (TCM) (42%). Neurosurgery was undertaken in 137 (9%) patients; being overweight, having a low Glasgow Coma Scale (GCS) score on admission, and Total Anterior Circulation Syndrome (TACS) clinical pattern on admission, were the only baseline factors associated with this intervention in multivariate analyses. Neurosurgery was associated with nearly three times higher risk of death/disability at 3 months post-stroke (odd ratio [OR] 2.60, p < 0.001). Continuation of antihypertensives in-hospital and at 3 and 12 months post-stroke was reported in 732/935 (78%), 775/935 (83%), and 752/935 (80%) living patients with hypertension, respectively.</p> <p>Conclusions</p> <p>The management of ICH in China is characterised by high rates of use of intravenous haemodiluting agents, neuroprotectants, and TCM, and of antihypertensives for secondary prevention. The controversial efficacy of these therapies, coupled with the current lack of treatments of proven benefit, is a call for action for more outcomes based research in ICH.</p

Occurrence Status and Influencing Factors of Cognitive Dysfunction in Population Aged 60 and Above

Background With the accelerated aging process, the incidence of dementia is increasing year by year, but there is no effective cure and the prognosis is poor. The cognitive function is still plastic during subjective cognitive decline (SCD) , which as a preclinical stage of dementia, it is of great significance for the prevention and management of dementia to investigate the prevalence and influencing factors of SCD. Objective To investigate the prevalence and risk factors of SCD, MCI and dementia in population aged 60 and above in Baotou, Inner Mongolia. Methods From June 2021 to September 2022, a cross-sectional survey was conducted involving 1 120 objects in 21 neighborhood councils and 17 village committees randomly selected from 3 banner counties (Hondlon District, Jiuyuan District and Guyang County) of Baotou City, Inner Mongolia Autonomous Region by using the combination of multistage sampling, cluster sampling and random sampling. General information of the study subjects were collected by questionnaire and their cognitive function was assessed. According to cognitive function, the study subjects were divided into the normal group (n=206) , SCD group (n=491) , MCI group (n=320) and dementia group (n=103) . Multivariate Logistic regression was used to analyze the influencing factors of cognitive function. Results The median age of the study subjects was 68.0 (63.0, 73.0) years and the median number of years of education was 9.0 (5.0, 11.4) years. Absence of spouse〔OR=2.542, 95%CI (1.139, 5.674) , P=0.023〕, obesity〔OR=6.058, 95%CI (2.281, 16.093) , P&lt;0.001〕, predominant vegetarian type of diet〔OR=3.037, 95%CI (1.868, 4.936) , P&lt;0.001〕, nightly sleep duration &lt;6 hours〔OR=1.662, 95%CI (1.099, 2.516) , P=0.016〕, smoking history〔OR=1.971, 95%CI (1.231, 3.157) , P=0.005〕, diabetes history〔OR=1.975, 95%CI (1.140, 3.422) , P=0.015〕, coronary heart disease history〔OR=3.501, 95%CI (1.016, 12.062) , P=0.047〕, and vision loss history〔OR=2.454, 95%CI (1.638, 3.677) , P&lt;0.001〕were risk factor for the prevalence of SCD in population aged 60 and above. Rural residence〔OR=2.636, 95%CI (1.231, 5.641) , P=0.013〕, absence of spouse〔OR=2.843, 95%CI (1.228, 6.582) , P=0.015〕, obesity〔OR=5.626, 95%CI (2.046, 15.475) , P=0.001〕, predominant vegetarian type of diet〔OR=3.832, 95%CI (2.212, 6.640) , P&lt;0.001〕, predominant meat type of diet〔OR=2.619, 95%CI (1.536, 4.465) , P&lt;0.001〕, smoking history〔OR=1.912, 95%CI (1.133, 3.227) , P=0.015〕, diabetes history〔OR=2.544, 95%CI (1.378, 4.697) , P=0.003〕, coronary heart disease history〔OR=3.945, 95%CI (1.110, 14.016) , P=0.034〕, and vision loss history〔OR=2.846, 95%CI (1.780, 4.551) , P&lt;0.001〕were risk factors for the prevalence of MCI in population aged 60 and above, education level of junior high school〔OR=0.180, 95%CI (0.103, 0.314) , P&lt;0.001〕, high school and above〔OR=0.075, 95%CI (0.041, 0.136) , P&lt;0.001〕were protective factors for MCI in population aged 60 and above. Rural residence〔OR=5.511, 95%CI (2.306, 13.170) , P&lt;0.001〕, absence of spouse〔OR=2.987, 95%CI (1.152, 7.746) , P=0.024〕, obesity〔OR=7.303, 95%CI (2.436, 21.890) , P&lt;0.001〕, predominant vegetarian type of diet〔OR=7.025, 95%CI (3.626, 13.609) , P&lt;0.001〕, predominant meat type of diet〔OR=2.255, 95%CI (1.102, 4.616) , P=0.026〕, nightly sleep duration&lt;6 hours〔OR=2.164, 95%CI (1.206, 3.883) , P=0.010〕, smoking history〔OR=2.661, 95%CI (1.415, 5.004) , P=0.002〕, diabetes history〔OR=2.186, 95%CI (1.033, 4.624) , P=0.041〕, coronary heart disease history〔OR=6.830, 95%CI (1.809, 25.783) , P=0.005〕and vision loss history〔OR=3.267, 95%CI (1.785, 5.979) , P&lt;0.001〕were risk factors for the prevalence of dementia in population aged 60 and above. Age 60-69 years〔OR=0.211, 95%CI (0.074, 0.597) , P=0.003〕, 70-79 years〔OR=0.218, 95%CI (0.077, 0.620) , P=0.004〕, education level of junior high school〔OR=0.473, 95%CI (0.229, 0.977) , P=0.043〕, high school and above〔OR=0.227, 95%CI (0.105, 0.493) , P&lt;0.001〕were protective factors for the prevalence of dementia in population aged 60 and above. Conclusion The prevalence rates of SCD, MCI and dementia among the older adults aged 60 and above in Baotou region of Inner Mongolia is at a high national level. Rural residents, old age, absence spouse, low education level, obesity, predominant vegetarian or meat type of diet, sleep less than 6 hours per night, smoking, diabetes, coronary heart disease and vision loss are the main risk factors of the prevalence of SCD, MCI and dementia among the older adults in this region

Mapping Ulva prolifera green tides from space: A revisit on algorithm design and data products

Since the first report in 2008, macroalgal blooms of Ulva prolifera (often called green tides) in the Yellow Sea have occurred every year, with their origins, transport pathways, temporal changes, as well as causes and consequences studied extensively. Of these studies, satellite remote sensing has been used widely to detect the bloom presence and quantify the bloom size (i.e., U. prolifera coverage in km2 or biomass in kilotons). However, substantial variability has been found in the refereed literature in the remote sensing methodology, results, and interpretation of the U. prolifera coverage, especially in the attempts to study inter-annual changes or long-term trends. There are often inconsistent or contradicting results even from the same satellite sensor. Such inconsistencies or contradictions create difficulty not only within the remote sensing community when presenting new methodology or results, but also to researchers when attempting to use the remote sensing results to make predictions or perform impact assessments. Here, we review the literature on the remote sensing methodology to detect and quantify U. prolifera blooms, and make recommendations based on physical principles. Specifically, we propose the following conceptual guidelines: 1) a reliable index or algorithm should be relatively tolerant to perturbations by non-optimal observing conditions (thick aerosols, thin clouds, moderate sun glint, cloud-adjacent straylight, which can all be found frequently in the study region) for presence/absence detection, as well as to small errors in the selected thresholds to quantify U. prolifera; 2) a reliable index or algorithm should also make it relatively easy to account for variability in subpixel coverage of U. prolifera (i.e., through pixel unmixing) in order to obtain an accurate estimate of total U. prolifera coverage from an image; 3) a reliable data product (i.e., U. prolifera maps) should be able to account for the variable clouds when interpreting spatial patterns or temporal changes, with uncertainty estimates provided whenever possible; and 4) both the algorithm and the data product should minimize manual work in order to make them more objective and repeatable by other researchers. Finally, we show different types of time series of U. prolifera amounts in the Yellow Sea using the approaches based on these guidelines and Moderate Resolution Imaging Spectroradiometer (MODIS) observations, and discuss their implications on the interpretation of annual changes in interdisciplinary studies

Prognosis and antiplatelet therapy of small single subcortical infarcts in penetrating artery territory: a post hoc analysis of the Third China National Stroke Registry

Background Small single subcortical infarction (SSSI) may be classified as parent artery disease-related or only branch involved according to the stenosis of parent artery. The study aimed to evaluate short-term and long-term prognoses and the effectiveness of antiplatelet therapy in SSSI.Methods We prospectively enrolled 2890 patients with SSSI from the Third China National Stroke Registry (CNSR-III) database from August 2015 to March 2018. We assessed clinical outcomes and antiplatelet treatment effects in patients with SSSI with and without parent artery stenosis (PAS) identified by magnetic resonance angiography.Results Among 2890 patients with SSSI in the perforator territory of the middle cerebral artery and the basilar artery, there were 680 (23.53%) patients with PAS and 2210 (76.47%) patients without PAS, respectively. After adjusting for potential confounders, the PAS group had a greater initial stroke severity (OR 1.262, 95% CI 1.058 to 1.505; p=0.0097) and a higher risk of ischaemic stroke recurrence at 3 months (OR 2.266, 95% CI 1.631 to 3.149; p&lt;0.0001) and 1 year (OR 2.054, 95% CI 1.561 to 2.702; p&lt;0.0001), as well as composite vascular events at 3 months (OR 2.306, 95% CI 1.674 to 3.178; p&lt;0.0001) and 1 year (OR 1.983, 95% CI 1.530 to 2.570; p&lt;0.0001), compared with the non-PAS group. In both groups, dual antiplatelet therapy was not superior to single antiplatelet therapy in preventing stroke recurrence, composite vascular events and disability.Conclusion PAS related to significantly higher rates of short-term and long-term stroke recurrence and composite vascular events, suggesting heterogeneous mechanisms in SSSI subgroups. The effectiveness of antiplatelet therapy for SSSI needs further investigation