浅析酸性水罐氮封系统设计

结合工程实例,简单阐述酸性水罐的氮封系统设计。本设计采用安全水封罐确保酸性水罐压力,通过脱臭罐排放硫化氢气体;在脱臭罐出现事故情况下则通过安全水封罐排放硫化氢气体。该流程与储运常规氮风系统流程相比,更加安全可靠,更有利于减少环境污染。     

绿色天然化妆品

虽然受经济衰退的束缚,天然个人护理品的购买力依然从2011年开始复苏。介绍了最新的各种天然护理品品牌以及含天然组分的新品。     

Enzymatic Writing to Soft Films: Potential to Filter,Store, and Analyze Biologically Relevant Chemical Information

Sensor‐based chemical analyses commonly enlist either the molecular recognition capabilities of biology (e.g., enzyme biosensors) or advanced information processing algorithms (e.g., the electronic nose). Here, a hybrid approach is proposed in which an enzyme is used to “filter” chemical information and write this information to a film which then serves as a permanent storage medium that can be ‘read’ repeatedly, interactively, and by multiple sensor modalities. This approach is demonstrated by analyzing common dietary phenols that are reported to offer health benefits. Specifically, the enzyme tyrosinase is used to convert these phenols into reactive quinones that graft (i.e., write) to a chitosan film. Grafting can be detected by optical, mechanical, and electrochemical sensors. Importantly, grafting confers redox activity to the films and this redox activity can be probed interactively by advanced electrochemical methods that allow the intrinsic redox reactivities to be compared, redox interactions to be identified, and biologically relevant redox activities to be examined. The transfer of chemical and biological information to a film is envisioned to provide broader access to the extensive capabilities offered by sensor technologies and signal processing methodologies.     

Adaptive Robust Waveform Selection for Unknown Target Detection in Clutter

A basic assumption of most recently proposed waveform design algorithms is that the target impulse response is a known deterministic function or a stochastic process with a known power spectral density(PSD).However,it is well-known that a target impulse response is neither easily nor accurately obtained;besides it changes sharply with attitude angles.Both of the aforementioned cases complicate the waveform design process.In this paper,an adaptive robust waveform selection method for unknown target detection in clutter is proposed.The target impulse response is considered to be unknown but belongs to a known uncertainty set.An adaptive waveform library is devised by using a signal-to-clutter-plus-noise ratio(SCNR)-based optimal waveform design method.By applying the minimax robust waveform selection method,the optimal robust waveform is selected to ensure the lowest performance bound of the unknown target detection in clutter.Results show that the adaptive waveform library outperforms the predefined linear frequency modulation(LFM)waveform library on the SCNR bound.     

高层建筑施工安全问题及管控措施研究

近些年来建筑业获得了飞速的发展,其中一个较为突出的现状就是高层建筑变得越来越多。由于高层建筑自身构造的特点,导致了高层建筑施工技术具有较高的要求。因此,高层建筑施工安全问题就成为了人们关注的焦点所在。本文将围绕高层建筑施工安全问题展开进一步的讨论,并根据高层建筑构造复杂化和功能实用化的特点,提出了我们必须强化对于高层建筑施工安全的管控措施,遏制住高层建筑施工安全隐患发生的源头,促进施工过程中的安全生产,从而保障高层建筑施工工程的质量,进一步保护好社会经济利益和个人人身安全。     

Value‐added bioconversion of biomass by solid‐state fermentation

The value‐added bioconversion of biomass is necessary due to the depletion of fossil fuels and deterioration of the global environment situation. Based on the analysis of characteristics of solid materials and the applicability of solid agro‐industrial residues used as feedstock for solid‐state fermentation (SSF), the authors established a value‐added bioconversion system for biomass using the key technology SSF. This article gives an overview of biomass bioconversion by SSF and the corresponding advances achieved in recent years. Copyright © 2012 Society of Chemical Industry     

一种基于八叉树分解的岩矿储量估算方法

论述的基于八叉树分解的岩矿储量估算方法,是针对现有的估算方法普遍存在着对已知数据要求过多、使用繁琐等缺点而提出来的。该方法具有对采样数据的要求不高、使用简便快捷的特点,用在普查阶段的岩矿储量估算有着明显的优越性。     

Ether linkage in poly(1,2-propylene carbonate), a key structure factor to tune its performances

As an alternating copolymer of CO₂ and propylene oxide, poly(1,2-propylene carbonate) (PPC) should be composed of fully carbonate structure, whereas it generally contains certain ether linkage due to the existence of competitive formation of ether linkage by consecutive epoxide enchainment. Though the ether linkage was not always the dominant structure in PPC, a new understanding was provided in that the ether linkage was crucial structure factor on the PPC performances, especially for oxygen barrier property, transparency, thermal and mechanical properties. The gas barrier properties and transparency of PPC film became worse with increasing ether linkages, the oxygen, nitrogen and carbon dioxide permeability of PPC with ether linkage of 0.6 % were 14 cm³/m²/24 h/0.1 MPa, 11 cm³/m²/24 h/0.1 MPa and 220 cm³/m²/24 h/0.1 MPa, respectively, while for PPC with ether linkage of 54.1 %, they became 116 cm³/m²/24 h/0.1 MPa, 108 cm³/m²/24 h/0.1 MPa and 599 cm³/m²/24 h/0.1 MPa, respectively. When the ether linkage in PPC increased from 0.6 % to 54.1 %, the thermal decomposition temperature at 5 wt% loss(T _d-5% ) increased from 218.6 °C to 241.0 °C, while the glass-transition temperature(T _g ) decreased from 45.2 °C to 11.1 °C, meanwhile, the room temperature tensile strength decreased from 55.4 MPa to 2.3 MPa, and the elongation at break increased from 8.5 % to 1558.2 %.     

A GIS-based management and publication framework for data handling of numerical model results

There has been an increasing awareness that large-scale datasets of earth-system model results would be produced and accumulated rapidly within the next few decades with extensive usage of numerical models. The successful exploration of these data for scientific research and engineering applications requires the capability of efficient storage, retrieval, integration and visualization of these large datasets. Robust publication methods are also needed to enable data exchange through the web to increase global research collaborations. In this study, a comprehensive GIS-based data management and publication framework (GMPF) was developed and applied to the use, representation, and analysis of hydrodynamic modeling results of Hamburg Port, Germany. Linking with GIS, a desktop- and a web-based model-results data atlas were developed to provide an interactive environment for various cartography and time series plots. The implementation of the framework was based on modular software design, open specifications and reuse of open source projects. The study results showed that the project life-cycle was shortened and development efforts were reduced through applying GMPF. The developed system could be integrated into commercial hydrodynamics software platforms to enhance the capability of model-results management and publication.     

C++语言中关于函数参数传递方式的探讨

在C++程序设计函数调用过程中,函数参数的传递是至关重要的内容,参数传递的方式不同,其传递的内容也不同类型,在程序设计过程中,选择恰当的参数传递方式,不仅可以使程序更加简洁,同时可以提供程序的运行效率,该文较为全面的论述了C++中函数参数传递的几种常见方式以及各种方式的优点及区别。