攀枝花市平菇培养料的筛选

该文介绍了攀枝花市平菇生产中培养料发展现状及其筛选方法。     

浅议粮库建设中桩基的应用与分析

通过中央粮食储备库建设的实际经历，指出在粮库建设过程中上部结构及地基的概况，并选择与之相应的合理桩基，并考虑基础整体价值优化选型的原则．     

Sliding mode H_∞ control for a class of uncertain nonlinear state-delayed systems

1 .INTRODUCTIONSince ti me delays and uncertainties are frequentlyencounteredin practical engineering,and often re-sult in poor performance or even systeminstabili-ty , much work has been done for the analysis andsynthesis of uncertain ti me-delay systems[1 ~5 ,7 ,8].The sliding mode control (SMC) is regarded as oneof the best approaches for the robust stabilizationof uncertain ti me-delay systems ,because it exhib-its the sliding mode which has anintrinsic propertyof adaptiveness for the…     

利用代理服务器实现对Internet教学培训的管理

对教师和学生有关互联网方面知识的教学培训必不可少，通过在校园网中增加代理服务器，便可对教学、培训网络环境实施有效的管理。     

拟南芥U59 snoRNA基因簇的结构与功能研究

在拟南芥（Ａｒａｂｉｄｏｐｓｉｓ ｔｈａｌｉａｎａ）中发现和鉴定了具有以义序列的ｓｎｏＲＮＡ组成的一个基因簇，该基因族由两个相同的ｓｎｏＲＮＡ基因组成。位于ｂｏｘＤ′上游的反义序列与人Ｕ５９ｓｎｏＲＮＡ的反义序列相同。因此命名为拟南芥Ｕ％９ａ和Ｕ５９ｂ。位于ｂｏｘＤ上游的反义序列在所有哺乳动物和酵母ｓｎｏＲＮＡ基因的反义序列中未找到同源拷贝，经低浓度的ｄＮＴＰ逆转录检验证实此反义序列并不指导拟南芥     

Modeling of Non-Coherent Sequential Acquisition Process for DS/SS Signals

A modified non-coherent sequential detection decision logic based on continuous accumulation to achieve fast PN code acquisition is proposed. To simplify the design and analysis, the equivalent relationship between the likelihood ratio of the current sample and that of all the previous samples is deduced. The scheme is proved to be an optimum sequential detection under certain assumptions. Because the average sample number (ASN) can not be calculated through the methods applied to the conventional sequential detection, an algorithm is also provided, which can estimate both the probability density function (pdf) and the upper threshole of ASN. The desired probabilities of false alarm and detection, as well as faster PN code acquisition compared to the conventional sequential detection can be achieved by employing this structure . In addition, Rayeigh-faded reception case is also taken into consideration. Performances of the proposed schemes are obtained, which suggest that the proposed non-coherent seque     

Simulation for CCSDS Advanced Orbiting System (AOS)with BONeS Designer

Abstract: This paper describes the modeling and simulation of the protocol of CCSDS advanced orbiting systems (AOS).The network features modeled in the implementation of CCSDS AOS are to multiplex different kinds of sources into virtualchannel data units (VCDUs) in the data processing module. The emphasis of this work is placed on the algorithm for com-mutating VCDUs into physical channels in the form of continuous data stream. The objectives of modeling CCSDS AOSprotocol are to analyze the performance of this protocol when it is used to process various data.     

Synthesis of Water-dispersed Polyurethane Adhesive and Its Application in Pigment Printing

Water-dispersed polyurethane (PU) adhesive is a novel and highly efficient adhesive with broad application potential. In this study, the key parameters affecting the synthesis and application of this adhesive were examined, and optimal conditions were identified. The water-dispersed PU adhesive was successfully synthesized, and applied in the fastness test of pigment printing on cotton fabric. The data demonstrated that all the fastnesses of PU adhesive were better than that of the cenventional PA one.     

基于知识的设计支持系统用于雷达系统方案设计

本文探讨了基于知识的设计支持系统基本概念和观点,提出分解和基于实例推理作为设计支持系统的基本求解模型。针对雷达系统,给出了设计知识的描述方法和系统的基本结构。     

Facile immobilization of heparin on bioabsorbable iron via mussel adhesive protein (MAPs)

Motivated by adhesive proteins in mussels, strategies using dopamine to modified surface have become particularly attractive. In the present work, we developed a novel and convenient method to modify the biodegradable Fe plates with heparin. Iron was first treated by a facile one-step p H-induced polymerization of dopamine, and then a high density heparin was successfully grafted onto the surface via coupling with polydopamine(PDA) active layer. Heparin immobilization contributed much longer blood clotting coagulation time than the pure Fe sample, and hence reduced the risk of thrombosis. Cell viability tests suggested that the heparin modified Fe plates were more favorable to the proliferation of ECV304 cells. In summary, the heparin modified Fe plates with good anti-thrombus properties and inhibiting the proliferation of VSMC cells provide great prospects for biodegradable iron.