Структура Водораздельной рудной зоны Многовершинного месторождения золота: данные по открытым горным выработкам и керну скважин

Актуальность работы обусловлена необходимостью доизучения структуры Многовершинного месторождения золота с целью повышения точности прогнозирования размеров потенциально рудных жил при проведении разведочных работ. Цель работы: уточнение строения рудной зоны Водораздельная Многовершинного месторождения золота. Методы исследования. Определение кинематики перемещений по разрывным нарушениям было выполнено методами стрейн-анализа. Прослеживание на глубину структур и увязка их пересечений в открытых выработках и керне скважин выполнено по разработанной нами методике учета структурных данных по неориентированному керну. Результаты. Выдвинута гипотеза о генетической связи отдельных систем разрывных нарушений с перемещениями по крупным разломам, определяющим структуру месторождения. Выделены системы сопряженных трещин, соответствующие дорудному, рудному, пострудному этапам становления месторождения. Результаты структурного анализа показывают, что основными рудоконтролирующими структурами являются трещины скола - сместители разрывов северо-восточного простирания, заложенные в предрудный этап и испытавшие подновление в рудный. На основе предложенной методики статистической обработки и учета углов к оси неориентированного керна проведен поиск рудоконтролирующих разрывных структур, прослеженных как на поверхности, так и бурением. Была подтверждена высокая вероятность их идентификации в керне скважин. Глубина экстраполяции выбрана исходя из наиболее вероятной максимальной глубины влияния рудоконтролирующих разрывов и глубины эрозионного среза. Замеренные для контактов жил углы к оси керна были пересчитаны в углы и азимуты падения с шагом поворота вокруг оси керна в 10? - для каждого замера рассчитаны 36 равновероятных положения. Из полученного массива данных по углу и азимуту падения были выбраны с определенным допуском замеры по элементам, сонаправленным структурным элементам, выделенным по поверхности. Таким образом, была оценена глубина развития отдельных систем трещин, относящихся к рудному этапу. Полученные результаты дают количественную характеристику выдержанности рудовмещающих трещин. Сформулированы требования к результатам документации керна для применения использованной методики для увязки пересечений по неориентированному керну.The relevance of the discussed issue is caused by the need of further investigation of the MNV gold deposit tectonic structure. The main aim of the studyis to increase the probability of forecasting the spatial properties of ore-bearing vein zones. The methods used in the study: strain-analysis of vein-containing structures and a new method of recognizing geological structures between the surface and the deep horizons using statistic data obtained from core documentation. The results. The author has put forward the hypothesis on a genetic relation of individual fault systems in the Vodorazdelnaya ore zone and the movements upon major faults. These faults define the structure of the whole Mnogovershinnoye deposit. Few systems of ajoint cracks were dedicated. These fractures were formed before, after and exactly in the ore stage. The carried out analysis shows that shear cracks (the main faults with North-Eastern strike) were the ore-controlling structures. They were formed in pre-ore stage and then they were reactivated in the ore stage. The proposed method for recognizing geological structures is based on finding intersections (data extrapolation) between structural data obtained by open mining and the accounted results of undirected diamond drilling core documentation. The depth of extrapolation was chosen as a maximum dipping depth of single investigated fractures due to erosion. Strike and dip angles for contacts, measured against core axis, were calculated in 36 positions of equal probability as if the plane of the contact was turned around the core axis with 10° discretion. A pair of dipping azimuth and angle was the key to recognize the same structures in trenches and in the core. So the author could measure the vertical dimension of cracks and veinlets as well as their consistency and proposed the requirements for documentation of core for implementation of the discussed method

Automated information system for the classification of data from XML documents

The article presents the developed automated information system that solves the task of structuring information obtained from the xml file and storing it in the database. Also, this AIS allows to change the information and upload it to the formats xls and xml

Incidence and prognostic significance of malignant arrhythmias during (repetitive) Holter electrocardiograms in patients with pulmonary hypertension

BackgroundIn patients with pulmonary hypertension (PH), increased pulmonary vascular resistance (PVR) may lead to increased right ventricular afterload and cardiac remodelling, potentially providing the substrate for ventricular arrhythmias. Studies dealing with long term monitoring of patients with PH are rare. The present study evaluated the incidence and the types of arrhythmias retrospectively recorded by Holter ECG in patients with newly detected PH during a long-term Holter ECG follow-up. Moreover, their impact on patient survival was evaluated.Patients and methodsMedical records were screened for demographic data, aetiology of PH, incidence of coronary heart disease, level of brain natriuretic peptide (BNP), results from Holter ECG monitoring, 6-minute walk test distance, echocardiographic data and hemodynamic data derived from right heart catheterization. Two subgroups were analyzed: 1. patients (n = 65) with PH (group 1 + 4) and derivation of at least 1 Holter ECG within 12 months from initial detection of PH and 2. patients (all PH etiologies, n = 59) with 3 follow-up Holter ECGs. The frequency and complexity of premature ventricular contractions (PVC) was classified into “lower” and “higher” (=non sustained ventricular tachycardia, nsVT) burden.ResultsHolter ECG revealed sinus rhythm (SR) in most of the patients (n = 60). Incidence of atrial fibrillation (AFib) was low (n = 4). Patients with premature atrial contractions (PAC) tend to have a shorter period of survival (p = 0.098), PVC were not correlated with significant survival differences. During follow-up PAC and PVC were common in all PH groups. Holter ECG revealed non sustained ventricular tachycardia in 19/59 patients [(32.2%); n = 6 during first Holter-ECG, n = 13 during second/third Holter-ECG]. In all patients suffering from nsVT during follow-up previous Holter ECG revealed multiform/repetitive PVC. PVC burden was not linked to differences in systolic pulmonary arterial pressure, right atrial pressure, brain natriuretic peptide and results of six-minute walk test.ConclusionPatients with PAC tend to have a shortened survival. None of the evaluated parameters (BNP, TAPSE, sPAP) was correlated with the development of arrhythmias. Patients with multiform/repetitive PVC seem to be at risk for ventricular arrhythmias

Обзор и назначение экономических информационных систем

ObjectivesThis study was designed to develop a technique to selectively increase the sympathetic tone to the heart by cardiac sympathetic nerve stimulation (SNS).BackgroundAccess to the cardiac sympathetic neurons may allow modulating the adrenergic tone of the heart while avoiding systemic side effects.MethodsCardiac sympathetic nerves course within neural sleeves along the subclavian artery. Because of this proximity, transvascular SNS was attempted with electrode catheters inside the subclavian artery in 16 pigs.ResultsRight/left (R-/L-) SNS (20 Hz) during ventricular pacing at 200/min evoked a >100% increase of left ventricular systolic pressure (baseline: 51 ± 1 mm Hg; L-SNS: 118 ± 26 mm Hg; R-SNS: 116 ± 33 mm Hg; p < 0.001) while systemic vascular resistance remained unchanged. There was a sigmoid dose-response curve with rapid on- and offset of the effect during SNS initiation/cessation. Positive inotropic effects persisted for 12 h of continued SNS (n = 4). Besides positive dromotropic effects, L-SNS/R-SNS yielded a 41% and 77% sinus rate increase, respectively.ConclusionsThe neural adrenergic tone to the heart can be selectively increased by catheter stimulation of cardiac efferent sympathetic nerves

Исследование влияния внешних факторов на изоляцию нефтепогружных кабелей

Нефтяная отрасль - это специфический пласт деятельности, требующий особого подхода к изготавливаемому оборудованию. Истощение поверхностных запасов нефти привело к тому, что процесс добычи сырья происходит на большей глубине, чем ранее, что требует использования более прочного оборудования, в том числе и кабеля для нефтяной промышленности. Цель работы: Исследование влияния механических нагрузок и времени старения на пробивное напряжение изоляционных материалов, применяемых в нефтепогружных кабелях.The oil industry is an activity where a special approach to manufactured equipment is required. Depletion of surface oil reserves has led to the fact that the process of extracting raw materials occurs at a greater depth than previously, so it is necessary to use more durable equipment, including cables for the oil industry

Preserved parasympathetic cardiac innervation after atrioventricular node modification : evidence from circle maps of respiratory sinus arrhythmia

Introduction: Respiratory sinus arrhythmia (RSA) and heart rate variability (HRV) are parameters of autonomic cardiac innervation. They decrease with age and after atrioventricular nodal modification (AVNM) suggesting vagal denervation in both situations. We hypothesized, however, that AVNM causes only a transient, functional decline in vagal activity, whereas aging causes permanent vagal denervation. A new method of analyzing RSA phase dynamics based on circle maps (CM) can potentially differentiate between both forms of reduced vagal activity.Methods: In 18 younger and 14 older healthy control subjects 24-hour Holter ECGs were recorded for HRV analysis. Repeated measurements of RSA were acquired during paced breathing (PB). In 16 consecutive patients undergoing AVNM the same measurements were applied before, 1 day and 3 months after the procedure. CM were calculated from consecutive RR intervals and the similarity between different CM quantified by the Kullback information gain (KIG).Results: HRV analysis revealed lower HF bands, LF bands and RSA amplitudes in older vs. younger control subjects. KIG revealed less similarity between younger and older control subjects than within the respective age groups. After AVNM a decrease in HF bands was noted in HRV analysis. Three months after AVNM, HF bands returned to pre-ablation values. CM obtained before and 1 day after AVNM displayed comparable similarity to CM acquired 1 day before and 3 months after ablation.Conclusions: In contrast to conventional HRV parameters, CM of RSA are not altered by ablation in the posteroseptal space but by aging. Thus, this new method appears to differentiate between transient autonomic modification and chronic denervation