永安火电厂电子皮带秤实物检测装置的标定

介绍永安火电厂电子皮带秤实物检测装置标定的依据、重要量值的确定及现场标定的内容,进而以实例说明电子皮带秤实物检测装置标定的方法,为省内电厂开展类似工作提供参考。

浅谈《实物检测管理系统》的开发心得

该文是软件开发经验之谈,讲述了建设工程实物检测管理系统的组成、功能及开发过程中的注意要点,对推进检测工作现代化管理及提高检测质量和效率有积极意义,并对同行开发类似软件有着很好的借鉴作用。

HCS型电子皮带秤实物检测装置的研制

能源部要求电力系统发电单位采用正平衡计算煤耗,为确保在线电子皮带秤运行可靠,计量准确,1990年山东电力试验研究所与济南衡器厂共同研制HCS型电子皮带秤实物检测装置。第一台安装在山东枣庄十里泉电厂1991年10月测试又经过8个多月使用,于1992年6月由国家技术监督局非自动衡器检测中心,山东省电力试验研究所共同对该产品进行检测,检测结果符合《监定大纲》的要求,省、市技术监督机关据此发给了产品许可证,省电力局确定该产品为山东省各发单位定点厂家。1991年为山东济南黄台电厂设计一台HCS-20型全自动化电子皮带秤实物检测装置,于1992年4月由山东省电力局,山东省电力试验研究所测试,测试结果符合《监定大纲》的要求,该二台检测装置发挥了应有的作用。

实物检测装置在电厂中的应用

本文介绍了实物检测装置的主要结构及在电厂中的一种应用方式,根据现场情况多次讨论选定实物检测装置的位置,解决了皮带秤物料试验的难题。为解决有些现场循环链码不能满足要求的历史遗留问题,本文提供了增加实物检测装置校验皮带秤的一种参考方案。

实物检测装置在电厂中的应用

介绍了实物检测装置的主要结构及其在电厂中的一种应用方式。由于滕州新源热电公司三期、四期项目规划设计时没有预留实物检测装置的位置,根据现场情况多次讨论选定了实物检测装置的位置,解决了皮带秤物料试验的难题,为解决有些现场循环链码不能满足要求的历史遗留问题提供了增加实物检测装置校验皮带秤的一种参考方案。

橡胶与金属热黏结胶黏剂厚度检测方法的研究

通过对橡胶与金属热硫化黏结胶黏剂厚度测试方法的研究,对检测过程基材粗糙度对胶带法检测、直接实物法检测结果的影响进行了分析和研究,并对胶带法检测、直接实物检测的应用提出适用性要求。

走出循环链码的误区

针对当前大部分用户采用循环链码取代实物检测装置的现象,分析了循环链码的不足和实物检测装置的优点,指出了实物检测装置仍是目前检测皮带秤的理想设备之一。采用循环链码取代实物检测装置,达不到预期的目的,看似节约了资金,其实是最大的浪费。

取得电力部“使用认可证”的国产电子皮带秤的测试特性

为了进一步贯彻《中华人民共和国计量法》、《电力部计量管理工作规定》,落实1992年全国能源工作会议和全国电力生产工作会议精神,逐步实现对火电厂燃料计量工作的依法管理,增强自我保护意识,防止伪劣产品进入电力部门,在国家技术监督局指导下,电力部于1992年9月15日至10月15日以及1993年10月6日至10月23日在安徽省铜陵市安徽省电子皮带秤产品检测站对参加“能源杯”

Characteristics of liver on magnetic resonance diffusion-weighted imaging:Dynamic and image pathological investigation in rabbit liver VX-2 tumor model

AIM： To investigate dynamical and image pathological characteristics of the liver on magnetic resonance （MR） diffusion-weighted imaging （DWI） in the rabbit VX-2 tumor model. METHODS： Forty New Zealand rabbits were included in the study and VX-2 tumor piece was implanted intrahepatically. Fifteen animals received two intrahepatic implantations while 25 had one intrahepatical implantation. DWI, T1- and T2-weighted of magnetic resonance imaging （MRI） were carried out on the 7th and the 14th d after implantation and DWI was conducted, respectively on the 21th d. Ten VX-2 tumor samples were studied pathologically. RESULTS： The rate of lump detected by DWI, TlWI and T2WI was 78.7%, 10.7% and 53.5% （X^2 =32.61, P 〈 0.001） on the 7th d after implantation and 95.8%, 54.3% and 82.9% （X^2 = 21.50, P 〈 0.001） on the 14th d. The signal of most VX-2 tumors on DWI was uniform and it was equal diffusion coefficient （ADC）. did not decrease on the 7th on the map of apparent The signal of VX tumors d after implantation, most of them slowly growing during the week following implantation without significant cell dying within the tumor. VX-2 tumors grew increasingly within 14 d after implantation but the signal of most VX-2 tumors on DWI or on the map of ADC was uniform or uneven and ADC of VX tumors decreased obscurely or slightly because tumor necrosis was still not obvious. On the 21th d after implantation, the signal of most VX-2 tumors on DWI or on the map of ADC was uneven because tumor necrosis was evident and ADC of VX-2 tumor necrotic areas decreased. The areas of viable cells in VX-2 tumors manifested a high signal on DWI and a low signal on the map of ADC. The areas of dead cells or necrosis in VX-2 tumors manifested low signals on DWI and low, equal or high signals on the map of ADC but they manifested high signals on DWI and on the map of ADC at the same time when the areas of necrotic tumor became liquefied or cystic. The border of tumors on DWI appeared gradually distinct and internal signals of tumor became progressively uneven. CONCLUSION： The manifestations of viable, necrotic and liquefied or cystic areas in VX-2 tumors on DWI are typical and DWI is of significant and potential values in clinical application in both the early detection and diagnosis of liver tumors.

Using oligonucleotide suspension arrays for laboratory identification of bacteria responsible for bacteremia

The aim of this study was to develop and validate an oligonucleotide suspension array for rapid identification of 15 bacterial species responsible for bacteremia, particularly prevalent in Chinese hospitals. The multiplexed array, based on the QIAGEN LiquiChip Workstation, included 15 oligonucleotide probes which were covalently bound to different bead sets. PCR amplicons of a variable region of the bacterial 23S rRNA genes were hybridized to the bead-bound probes. Thirty-eight strains belonging to 15 species were correctly identified on the basis of their corresponding species-specific hybridization profiles. The results show that the suspension array, in a single assay, can differentiate isolates over a wide range of strains and species, and suggest the potential utility of suspension array system to clinical laboratory diagnosis.

Three-Dimensional Finite Element Numerical Simulation and Physical Experiment for Magnetism-Stress Detecting in Oil Casing

The casing damage has been a big problem in oilfield production. The current detection methods mostly are used after casing damage, which is not very effective. With the rapid development of China's offshore oil industry, the number of offshore oil wells is becoming larger and larger. Because the cost of offshore oil well is very high, the casing damage will cause huge economic losses. What's more, it can also bring serious pollution to marine environment. So the effective methods of detecting casing damage are required badly. The accumulation of stress is the main reason for the casing damage. Magnetic anisotropy technique based on counter magnetostriction effect can detect the stress of casing in real time and help us to find out the hidden dangers in time. It is essential for us to prevent the casing damage from occurring. However, such technique is still in the development stage. Previous studies mostly got the relationship between stress and magnetic signals by physical experiment, and the study of physical mechanism in relative magnetic permeability connecting the stress and magnetic signals is rarely reported. The present paper uses the ANSYS to do the three-dimensional finite element numerical simulation to study how the relative magnetic permeability works for the oil casing model. We find that the quantitative relationship between the stress' s variation and magnetic induction intensity's variation is: Δδ =K* ΔB, K = 8.04×109, which is proved correct by physical experiment.

Computational prediction and experimental validation of novel markers for detection of STEC O157:H7

AIM:To identify and assess the novel makers for detection of Shiga toxin producing Escherichia coli (STEC) O157:H7 with an integrated computational and experimental approach. METHODS:High-throughput NCBI blast (E-value cutoff e-5) was used to search homologous genes among all sequenced prokaryotic genomes of each gene encoded in each of the three strains of STEC O157:H7 with complete genomes,aiming to find unique genes in O157:H7 as its potential markers. To ensure that the identified markers from the three strains of STEC O157:H7 can serve as general markers for all the STEC O157:H7 strains,a genomic barcode approach was used to select the markers to minimize the possibility of choosing a marker gene as part of a transposable element. Effectiveness of the markers predicted was then validated by running polymerase chain reaction (PCR) on 18 strains of O157:H7 with 5 additional genomes used as negative controls. RESULTS:The blast search identified 20,16 and 20 genes,respectively,in the three sequenced strains of STEC O157:H7,which had no homologs in any of the other prokaryotic genomes. Three genes,wzy,Z0372 and Z0344,common to the three gene lists,were selected based on the genomic barcode approach. PCR showed an identification accuracy of 100% on the 18 tested strains and the 5 controls. CONCLUSION:The three identified novel markers,wzy,Z0372 and Z0344,are highly promising for the detection of STEC O157:H7,in complementary to the known markers.

Experimental Study of Ultrasound on MDR in a Human Tumor in Vivo

OBJECTIVE To evaluate the potential efficacy of low-intensity ultrasound （US） in combination with anticancer drugs to reverse multidrug resistance （MDR）in nude mice. METHODS A total of 40 male and female athymic nude mice were inoculated subcutaneously with 5×10^6 HepG2/ADM and HepG2 cells. Ultrasound with pulsed irradiation at an average intensity of 0.5 W/cm^2 was given to the tumor area 10 rain after administration of adriamycin （ADM）. The tumor 3 dimensional diameters were measured by calipers before and after treatment, and the tumor growth indexes （TGI） calculated. RT-PCR was used to detect the gene levels of the HepG2/ADM cells. Immunohistochemical analyses for MDR proteins were conducted on the tumor tissues. RESULTS The ultrasonic treatment resulted in an average reduction in the tumor volume of 62% one month later. The relative mRNA levels of MDR1 and MRP were significantly different among the following 4 groups： untreated group as control, ADM treated; US treated; and ADM plus US treated. The mRNA levels of mdrl and mrp were down-regulated in the US groups compared to those of the non-ultrasound groups by multiple comparisons. The relative mRNA levels of Irp expression were not significantly changed. The results of immunohistochemistry indicated that tumor tissue from animals treated with US had remarkably low mdrl and mrp expression. CONCLUSION The results showed that low-intensity US can effectively reduce the size of adriamycin-resistant human hepotacarcinoma in a nude mouse model, and support the efficacy of US to overcome multiple mechanisms of drug resistance.

Profiling and Comparison of Color Body Wall Transcriptome of Normal Juvenile Sea Cucumber(Apostichopus japonicus) and Those Produced by Crossing Albino

Sea cucumber(Apostichopus japonicus) is one of the most important aquaculture animals in China. Usually its normal body color is black that fits its living environment. The juvenile individuals obtained by crossing albino sea cucumber segregated in body color. To document the transcriptome difference between albino associating sea cucumber and the control, we sequenced their transcriptomes with RNA-seq. Approximately, 4.790 million(M) and 4.884 M reads, 200 nt in length, were generated from the body wall of albino associating sea cucumber and the control, respectively, from them, 9550(46.81%) putative genes were identified. In total, 583 genes were found to express differentially between albino associating sea cucumber and the control. Of these differentially expressed genes(DEGs), 4.8% changed more than five-folds. The expression levels of eight DEGs were confirmed with real-time PCR. The changing trend of these DEGs detected with real-time PCR agreed well with that detected with RNA-seq, although the change degree of some DEGs was different. Four significantly enriched pathways were identified for DEGs, which included phagocytosis, Staphylococcus aureus infection, ECM-receptor interaction and focal adhesion. These pathways were helpful for understanding the physiological difference between albino associating sea cucumber and the control.

The Prosperity of Using Domestic Triticale Varieties in Kyrgyzstan

The present researches mentioned questions of economic use of domestic triticale and their influences on a phytosanitory condition and fertility of an irrigated arable land in the Chuy Valley of Kyrgyzstan. The result of the work consists of four tables, purpose of the work was to discover roots systems, nutrion value and the main laboratory testing of samples were conducted at the Humboldt University in Berlin, which was completed under the high and compliant standards of the world. The present research conducted on triticale varieties was firstly studied in Kyrgyzstan.

PandaX: a liquid xenon dark matter experiment at CJPL

PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.

Explanations of the DAMPE high energy electron/positron spectrum in the dark matter annihilation and pulsar scenarios

Many studies have shown that either the nearby astrophysical source or dark matter （DM） annihilation/decay can be used to explain the excess of high energy cosmic ray （CR） e^±which is detected by many experiments, such as PAMELA and AMS-02. Recently, the dark matter particle explorer （DAMPE） collaboration has reported its first result of the total CR e^± spectrum from 25 GeV to 4.6TeV with high precision. In this work, we study the DM annihilation and pulsar interpretations of this result. We show that the leptonic DM annihilation channels to r＋＇/＂-, 4p, 4＂/＇, and mixed charged lepton final states can well explain the DAMPE e^± spectrum. We also find that the mixed charged leptons channel would lead to a sharp drop structure at - TeV. However, the ordinary DM explanations have been almost excluded by the constraints from the observations of gamma-ray and CMB, unless some exotic DM models are introduced. In the pulsar scenario, we analyze 21 nearby known pulsars and assume that one of them dominantly contributes to the high energy CR e^± spectrum. Involving the constraint from the Fermi-LAT observation of the e^± anisotropy, we find that two pulsars could explain the DAMPE e^± spectrum. Our results show that it is difficult to discriminate between the DM annihilation and single pulsar explanations of high energy e^± with the current DAMPE result.