Asymmetric energy flow in coupled nonlinear LC transmission line

We constructed a coupled LC transmission line and studied the propagation of waves in it. We found asymmetric energy flow when we changed the driving conditions at the boundary. We analyzed this change and believe that it occurs because of the bandpass characteristics of the LC transmission line and high-order harmonic waves induced by nonlinearities. The LC transmission line could be used to simulate a microscopic crystal lattice. Therefore, we hope to observe thermal rectification in the system. We investigated the dependence of the system on different parameters, and then discussed the multi-frequency condition to aid in experimental verification.     

DNA damage stress induces the dissociation of Smurf1/2 from MDM2 in a slow manner

The tumor suppressor p53 locates at the key point of cell growth or apoptosis balance, and the expression level of p53 is tightly controlled by ubiquitin ligases including MDM2. Upon DNA damage stresses, p53 was accumulated and activated, leading to cell cycle arrest or apoptosis. We previously showed that Smad ubiquitylation regulatory factor 1/2 (Smurf1/2) promotes p53 degradation by interacting with and stabilizing MDM2, and consequently enhancing MDM2-mediated ubiquitylation of p53. However, it is uncle...     

Micro-particle deposition and lobar distribution of mass flow in human upper respiratory tract model

A representative human upper respiratory tract model consisting of oropharyngeal and asymmetric tracheobronchial(TB) airways from the trachea(G0) to the main lobar bronchi(G2) was constructed. Laminar-to-turbulent airflow for typical inhalation modes as well as micro-particle transportation,wall deposition and mass flow to lobes was simulated using the CFX10.0 software from Ansys Inc. The numerical particle deposition efficiency of the oropharynx region and two generations(G1 and G2) of TB airways shows gre...     

Characteristics and realization of the second generation surface acoustic wave’s wavelet device

1.INTRODUCTIONDue to the process and characteristics of the non-stationary signals both in ti me and frequency do-mains,wavelet technology has been widely em-ployedin scientific research and engineering appli-cation fields[1~3].To date,wavelet algorithmthatneeds a larger number of mathematic operationsand complicated program is mainly realized bycomputer,whichis quite difficult and expensive toapplyit to engineeringfields and portable electron-ic systems.To solve these problems,we proposed…     

Revision of the genus Abrestheria (Crustacea: Conchostraca) from the Dabeigou Formation of northern Hebei, China

Re-examination of the type specimens of the conchostracan genus Abrestheria using a scanning electron microscope (SEM) has revealed details of carapace features of important taxonomic value, which have not been described hitherto. The new characteristics include: (1) small-sized reticulations on growth lines near the umbo; (2) serrated lower margins of growth lines; (3) punctae in the even lumina of reticulations; and (4) tubercles at the lower ends of the claviform radial lirae on the growth bands of the lower parts of the carapace. Consequently, the diagnosis of Abrestheria is revised, and a discussion is also made concerning relationships between Abrestheria and closely related genera, such as Eosestheriopsis, Eosestheria and Orthestheria, which have important biostratigraphic implications.     

Biodiversity and palaeoclimate of the Middle Jurassic floras from the Tiaojishan Formation in western Liaoning, China

The Middle Jurassic Tiaojishan Formation in Beipiao City, western Liaoning comprises a variety of plant fossils including leaf impressions, compressions, permineralized rhizomes, fossil wood and dispersed spores and pollen grains. Impression and compression data suggest that the flora in the Tiaojishan Formation is dominated by Bennettitales, ferns and Nilssoniales, followed by ginkgophytes; conifers and sphenopsids are less common. Abundant permineralized rhizomes are referable to diverse taxa within fern families such as Osmundaceae and Cyatheaceae. Abundant and upright fossil stumps are common in the Tiaojishan Formation. They are well preserved with distinct growth rings and are predominatly conifers. The floristic signature of the Tiaojishan Formation indicates that subtropical to temperate warm and humid climates prevailed during the late Middle Jurassic in the Beipiao area. Growth ring pattern analysis of the fossil conifer wood demonstrates a consistent and distinct seasonal climate during this interval. The biodiversity of the remarkable Tiaojishan flora provides essential evidence for understanding the vegetation, palaeoclimate and environmental evolution of western Liaoning during the Middle to Late Jurassic.     

Magnetism parameters characteristics of drilling deposits in Jianghan Plain and indication for forming of the Yangtze River Three Gorges

The forming time of the Yangtze River Three Gorges is considered as one of keys in the research on the Yangtze River, also is one of the most disputed hotspots. In order to solve the difficult problem, the authors adopt the internationally recognized thoughts and methods of substance tracing from source to sink. The lithologic characteristics, magnetic parameters and magnetic mineral characteristics of deposits in 2 bores are analyzed, which are both sampled from the sedimentary center of the Jianghan Plain. The results are as follows： At about 110 m depth of the core, the contents of coarse materials and stable magnetic mineral both increase significantly. Meanwhile, the magnetic susceptibility of sediment, saturation isothermal remanent magnetization and magnetic susceptibility values of anhysteretic remanent magnetism increase suddenly, which all reflect that at about 110 m depth, the important adjustment has appeared in water system of the Jianghan Plain, and the sedimentary environment and material composition have changed greatly. And it may be the horizon where the Yangtze River Three Gorges formed, its forming time reflected by the paleomagnetic dating is between 1.17 and 1.12Ma B.P.     

浅谈高职高专会计教育改革

本文在阐述高职高专会计教育的培养目标以及当前会计教育所存在的问题基础上,从课程体系、教学方式、会计实践、教师素质等方面,探讨了高职高专会计教育的改革。高职高专会计教育需要明确培养目标,以培养学生的实践能力为中心,以就业为导向,围绕经济发展的要求培养面向21世纪的实用型、管理型会计人才。     

Three-Gorges Reservoir Area on the Yangtze River Faced with Risk of Induced Destructive Earthquakes

The Three-Gorge Water Conservancy Project on the Yangtze River started to impound water by locking gates on June１,２００３．A swarm of more than２０００small earthquakes suddenly occurred densely along the river section in Xinling Town north of Badong,Hubei Province,on June７．This caused grave concern in the following years,but,with the completion of the second- and third-phase engineering construction,the water level in the reservoir will rise up to１５６m and１７５m respectively,no matter whether it can induce larger and stronger earthquakes．After an analysis of the distribution of active faults in the eastern part of the reservoir area,their intersections and capability to generate earthquakes from a seismo-tectonic viewpoint,we consider that after the reservoir impounding,two potential focal zones existing in Badong and Zigui counties may generate M５.５earthquake,the seismic intensity of which may reachⅧ．It will induce landslide bodies in the reservoir area to be reactivated and slide．The evidence is the large-scale landslide occurring on the Shazhenxi Creek river in Zigui County on June１２,２００３．     

Target distribution in cooperative combat based on Bayesian optimization algorithm

1 .INTRODUCTIONThe target distributionis one of difficult content incooperation air combat . The missionis fully exertsthe whole advantage of all firepower units . Thedistributionis finding the best schedule which ac-cord with distribution principles at the moment ofgiven conditions .It can make finitely weapons gainthe best effective through opti mizing method. Theresult is that the effective of weaponis best andthewhole benefits are highest .But the target distribu-tionis restricted wi…