Beijing Academic Library & Information System (BALIS) is the largest regional university library alliance (RULA) in Beijing, which has 100 member libraries, covering almost all university libraries (UL) of Beijing. BALIS was founded in 2007, through more than fifteen years of development, which has formed a certain business scale. Its services mainly cover six aspects: document delivery (DD), interlibrary loan (ILL), group procurement, joint consulting, business training, and technical support. ...

Library, Intelligence and Philology 

In order to reveal the enrichment characteristics of shale oil in the southeastern Ordos Basin, the shale samples in Yan’an exploration area were taken as the research object, combined with drilling and logging data, geochemical tests such as organic carbon, rock pyrolysis and vitrinite reflectance were carried out, and the shale gas enrichment and main controlling factors of Yanchang Formation in the study area were discussed in detail. The results show that: 1) The organic carbon (TOC) content...

Petroleum Geology 

In the past, the research on tight oil accumulation in the eastern part of Shanbei slope of Ordos basin is relatively weak, mainly because the effective source rock is not developed in this area, and the crude oil is migrated from Chang 7 source rock in the center of the lake basin. Taking Qilicun Oilfield in Yan’an area as an example, this paper studies the reservoir-forming conditions of Chang 7 tight oil according to the methods and means of well logging, thin section identification, reservoi...

Petroleum Geology 

In this paper, we study to solve general Cauchy-Jensen additive mappings with 3k-variables. First, we investigated the Cauchy-Jensen stability of the functional Equations (1.1), (1.2) and (1.3) in Banach-spaces and then I apply the fixed point method to establish homomorphisms on the Banach algebras.

Mathematics 

Since the central government launched the “low toxicity biological pesticide subsidy demonstration pilot project” in eight provinces and cities in 2011, the country has successively issued a series of policies to guide the application and promotion of biological pesticides. This paper collects and analyzes the data from the field of biological pesticide policy practice for more than ten years. The results show that there are many related policy texts on the promotion of biological pesticides, an...

Agricultural Science 

In this paper, in order to study the microscopic pore structure characteristics and influencing factors of its dense reservoir, the lithological characteristics and pore characteristics of the Chang 4 5 reservoir in Heijiabao area were studied by using casting thin section, scanning electron microscope, high pressure mercury compression and other testing techniques, and the reservoir distribution characteristics were also studied.

Petroleum Geology 

Cardiocerebral infarction (CCI), defined as the concomitant occurrence of acute myocardial infarction (AMI) and acute ischaemic stroke (AIS), has been rarely reported in the literature. The aim of this manuscript is to describe the challenges in the treatment of CCI and to highlight the different approaches in the management of this entity. We report the case of two young women admitted to our cardiology department with acute coronary syndrome concomitant with stroke at different times and whose...

Cardiology 

The effect of centimeter waves of non-thermal level on four types of bacteria has been studied. On E. coli strains, a sharp increase in survival during the first cycle of cell division was obtained. The mechanism of inhibition of pathogenic bacteria by a weak electromagnetic field is explained. The mechanism of stimulating the survival of bacteria associated with the activation of genes that reduces the number of dying bacteria is explained. The general form of the modified Ferhulst equat...

Pharmacology  Cell Biology  Pathology  Biophysics 

GCOOH-WO₃ composites mixed with different amounts of Graphene-COOH functionalized (GCOOH) (0, 0.05, 0.1 and 0.2 wt%) were prepared by hydrothermal method at 180°C for 10 h and 24 h. The asprepared WO₃ and GCOOH-WO₃ composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy and other equipment. The effect of the amount of graphene in the composites on the gas-sensing responses and the gas-sensing selecti...

Physical Chemistry 

The stannic oxide (SnO₂) was modified using Quasi-Molecular imprinting method. The morphology and structure of the modified SnO₂ were characterized by X-ray diffraction (XRD), and transmission electron microscopy (SEM). The gas-sensing performance of the modified and unmodified SnO₂ sensors was compared, and the mechanism of MIP technique in improving the gas-sensing performance of SnO₂ was discussed. The selective test results showed that the improved...

Physical Chemistry