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14 papers found.
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Identification of bacterial communities in sediments of Poyang Lake, the largest freshwater lake in China

Bacteria play a vital role in various biogeochemical processes in lacustrine sediment ecosystems. This study is among the first to investigate the spatial distribution patterns of bacterial community composition in the sediments of Poyang Lake, the largest freshwater lake of China. Sediment samples were collected from the main basins and mouths of major rivers that discharge into ...

Some results on zeros and the uniqueness of one certain type of high difference polynomials

Jie Zhang In this paper, we investigate the distribution of the zeros of some high differential-difference polynomials and obtain some uniqueness theorems with regard to it. MSC: 30D35; 34M10 1

Some results on zeros and the uniqueness of one certain type of high difference polynomials

Jie Zhang In this paper, we investigate the distribution of the zeros of some high differential-difference polynomials and obtain some uniqueness theorems with regard to it. MSC: 30D35; 34M10 1

Small cell backhaul: challenges and prospective solutions

2003. He has over 30 patents granted, 22 patent filings pending and over 35 peer-reviewed publications. He is a Senior Member of the IEEE. Jie Zhang () is a full professor and holds the Chair in

Development of tartaric esters as bifunctional additives of methanol-gasoline

tartaric is the most effective one. Competing interests The authors declare that they have no competing interests. Authors’ contributions Jie Zhang carried out the synthesis of tartaric esters, and

Synthesis and application of polyaminoamide as new paraffin inhibitor from vegetable oil

Gang Chen 0 Ying Tang 0 Jie Zhang 0 0 College of Chemistry and Chemical Engineering, Xi'an Shiyou University , Xi'an Shaanxi, 710065, China In this work, a series of novel paraffin inhibitor

A novel model mouth system for evaluation of In Vitrorelease of nicotine from moist snuff

Background Pouch moist snuff, as a form of oral smokeless tobacco products, is becoming increasingly popular in North America, Scandinavia (where it is known as Snus), South Asia and parts of Africa. User usually places a pouch between the upper jaw and cheek to obtain euphoria from tobacco, leading to partial intake of tobacco constituents. To evaluate user exposure to tobacco, an ...

Investigation of DiospyrosKaki L.f husk extracts as corrosion inhibitors and bactericide in oil field

Background Hydrochloric acid is used in oil-well acidizing commonly for improving the crude oil production of the low-permeable reservoirs, while it is a great challenge for the metal instruments involved in the acidification. Developing natural products as oilfield chemicals is a straight way to find less expensive, green and eco-friendly materials. The great plant resources in ...

Investigation of ginkgo biloba leave extracts as corrosion and Oil field microorganism inhibitors

Jie Zhang 0 2 0 College of Chemistry and Chemical Engineering, Xi'an Shiyou University , Xi'an Shaanxi 710065 , People's Republic of China 1 Shannxi Hai'an Industry Co., LTD , Xi'an 710065 , People's

A context-aware framework for the efficient integration of femtocells in IP and cellular infrastructures

In today’s heterogeneous networking (HetNet) environments, where end users are provided with universal connectivity opportunities, femtocell deployments can become key players in the enhancement of critical performance indicators such as capacity, coverage, QoS, etc. In order to confront the up-to-date LTE femtocell challenges, we propose a context-aware framework that provides a ...

New bactericide derived from Isatin for treating oilfield reinjection water

Isatin, an extract from Strobilanthes cusia (Nees) Kuntze, was the base for synthesizing derivatives that were screened for antibacterial activity against oilfield water-borne bacteria. The bacterial groups are sulfate reducing, iron and total. The derivatives were characterized by spectrums and they showed good to moderate activity against sulfate reducing bacteria.

Implementation and Validation of a New Combined Model for Outdoor to Indoor Radio Coverage Predictions

A new model used to compute the outdoor to indoor signal strength emitted from an outdoor base station is presented. This model is based on the combination of 2 existing models: IRLA (Intelligent Ray Launching), a 3D Ray Optical model especially optimized for outdoor predictions, and MR-FDPF (Multiresolution Frequency Domain ParFlow), a 2D Finite Difference model initially ...

Intracell Handover for Interference and Handover Mitigation in OFDMA Two-Tier Macrocell-Femtocell Networks

There are two main access policies (open and closed) to Femtocell Access Points (FAPs), being closed access the customers favorite. However, closed access is the root cause of crosstier interference in cochannel deployments of two-tier networks (i.e., macrocells and femtocells). Further, the effect of this problem is remarkably serious in the downlink of outdoor users not ...

Applying FDTD to the Coverage Prediction of WiMAX Femtocells

´lpar J u¨ttner 0 David L o´pez-Pe´ rez 0 Jie Zhang 0 Recommended by Michael A. Jensen 0 Centre for Wireless Network Design (CWIND), University of Bedfordshire , D109 Park Square, Luton, Bedfordshire LU1