A Novel Lapping Method for High Precision Balls Based on Variable-Radius V-Groove

2013 ◽  
Vol 1 (4) ◽  
Author(s):  
Ping Zhao ◽  
Weigang Guo ◽  
Ming Feng ◽  
Binghai Lv ◽  
Qianfa Deng ◽  
...  
Keyword(s):  
High Precision ◽  
High Efficiency ◽  
Ball Bearing ◽  
Lower Plate ◽  
The Novel ◽  
Variable Radius ◽  
Novel Method ◽  
Set Up ◽  
High Consistency ◽  
Steel Balls

The precision ball is the most key component of ball bearing, which is widely used in many precision mechanical fields. This paper presents a variable-radius V-groove lapping method since this method can make the spin angle vary between 0 deg and 90 deg, and the lapping trajectory can cover the ball's surface. Based on this lapping method, an observation of lapping surface of balls experiment is set up in which blackened balls is brightened effectively only after 10 circulations of lower plate in 2 min. Next, another experiment is also done: A batch of G16 level steel balls has been lapped to G5 level in the machining experiment. All results illustrate that the novel method has properties of high efficiency, high precision, and high consistency, which needs further study and then it is likely to replace the traditional one in the future.

Synthesis and Antifouling Capability of New Mixture Ratio Coating Containing Methoxysilane Moiety

2012 ◽  
Vol 152-154 ◽  
pp. 1211-1214
Author(s):  
Qiang Wang ◽  
Zhuan Ni Yu ◽  
Liang Min Yu
Keyword(s):  
Environmental Protection ◽  
High Efficiency ◽  
East Coast ◽  
Acrylic Resin ◽  
Test Site ◽  
The Novel ◽  
Mixture Ratio ◽  
Static Test ◽  
Antifouling Coating ◽  
Set Up

In recent years, high-efficiency and low-toxic antifouling coating are predominant in view of environmental protection and public safety. In this paper, a novel coating containing methoxysilane and acrylic resin were synthesized which have special structure to antifouling. We concluded the colonization of benthic diatoms (Nitzschia flosterium) of the novel coating, taking the antifouling coating containing AM(4.3%w\w）, HD-70 (3.4%w\w），VTMO (2.3%w\w）and Cu2O (28.5%w\w）for instance, we obtained that the colonization of Nitzschia flosterium was 4.3*104N.cm-2. A static test site was set up in Number 8-dock of Qingdao harbor, on the East Coast of China to investigate the antifouling effectiveness of the novel antifouling coating. The results of the present paper demonstrate that the novel coating enhanced the antifouling .

scholarly journals Balloon-borne Limb profiling of UV/vis skylight radiances, O<sub>3</sub>, NO<sub>2</sub> and BrO: technical set-up and validation of the method

2004 ◽  
Vol 4 (6) ◽  
pp. 7631-7665 ◽  
Author(s):  
F. Weidner ◽  
H. Bösch ◽  
H. Bovensmann ◽  
J. P. Burrows ◽  
A. Butz ◽  
...  
Keyword(s):  
Electrochemical Cell ◽  
Trace Gas ◽  
The Novel ◽  
Atmospheric Parameters ◽  
Near Ir ◽  
Solar Occultation ◽  
Novel Method ◽  
Gas Measurements ◽  
Set Up

Abstract. A novel light-weight, elevation scanning and absolutely calibrated UV/vis spectrometer and its application to balloon-borne Limb radiance and trace gas measurements is described. Its performance and the novel method of balloon-borne UV/vis Limb trace gas measurements has been tested against simultaneous observations of the same atmospheric parameters available from either (a) in-situ instrumentation (cf., by an electrochemical cell (ECC) ozone sonde also deployed aboard the gondola) or (b) trace gas profiles from inferred UV/vis/near IR solar occultation measurements performed on the same payload. The novel technique is also cross validated with radiative transfer modelling. Reasonable agreement is found (a) between measured and simulated Limb radiances and (b) inferred Limb O3, NO2 and BrO and otherwise measured profiles when properly accounting for all relevant atmospheric parameters (temperature T, pressure P, aerosol extinction, and major absorbers).

scholarly journals A Novel and High-Precision Method for Calculating the γ-Ray Build-Up Factor for Multilayer Shields

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Chao Li ◽  
Yingming Song ◽  
Zehuan Zhang ◽  
Jie Mao ◽  
Weiwei Yuan ◽  
...  
Keyword(s):  
Radiation Field ◽  
High Precision ◽  
Single Layer ◽  
Field Calculation ◽  
The Novel ◽  
Precision Method ◽  
Practical Tool ◽  
Novel Method ◽  
Kernel Integration ◽  
Single Material

In the field of radiation protection, the point-kernel code method is a practical tool widely used in the calculation of 3-D radiation field, and the accuracy of the point-kernel integration method strongly depends on the accuracy of the build-up factor. It is well known that calculation of the build-up factor for single-layer shields is composed of single material, but it is very complicated to calculate the build-up factor for multilayer shields (MLBUF). Recently, a novel and high-precision method based on the deep neural network (DNN) for calculating MLBUF has been proposed. In this paper, the novel method is described completely by slab models. Through the study of photon transport in multilayer shields, the parameters that mainly affect the calculation of build-up factor are analyzed. These parameters are trained by DNN as the input vectors, and the build-up factor for multilayer shields is predicted based on the trained DNN. The results predicted by DNN confirm that the method can calculate the build-up factor for multilayer shields quickly and accurately. The method has been preliminarily applicated into a 3-D radiation field calculation software, and it has proved that the method for calculating MLBUF has a broad application prospects in 3-D radiation field calculation.

scholarly journals Development of a High-Efficiency Immunomagnetic Enrichment Method for Detection of Human Norovirus via PAMAM Dendrimer/SA-Biotin Mediated Cascade-Amplification

2021 ◽  
Vol 12 ◽  
Author(s):  
Junshan Gao ◽  
Le Zhang ◽  
Liang Xue ◽  
Weicheng Cai ◽  
Zhiwei Qin ◽  
...  
Keyword(s):  
High Efficiency ◽  
Pamam Dendrimer ◽  
Capture Efficiency ◽  
The Novel ◽  
Human Norovirus ◽  
Enrichment Method ◽  
Detection Rates ◽  
Immunomagnetic Enrichment ◽  
Novel Method ◽  
Cascade Amplification

Human norovirus is a common cause of acute gastroenteritis worldwide, and oysters have been found to be the main carriers for its spread. The lack of efficient pre-treatment methods has been a major bottleneck limiting the detection of viruses in oysters. In this study, we established a novel immunomagnetic enrichment method using polyamidoamine (PAMAM) dendrimer/SA-biotin-mediated cascade amplification for reverse transcriptase quantitative real-time polymerase chain reaction (RT-qPCR) detection. We compared the capture efficiency of traditional immunomagnetic enrichment, biotin-amplified immunomagnetic enrichment, and PAMAM dendrimer/SA-biotin-mediated cascade-amplification immunomagnetic enrichment. The optimal capture efficiency of the novel method was 44.26 ± 1.45%, which increased by 183.17% (P &lt; 0.01) and 18.09% (P &lt; 0.05) compared with the first two methods, respectively. Three methods were all applied in detecting norovirus in 44 retail oysters, the detection rate of the PAMAM dendrimer/SA-biotin-mediated method was 25.0%, which was higher than those of traditional IME (15.90%) and SA-biotin-amplified IME (18.80%) by 9.1 and 6.2%, respectively. In conclusion, the novel method can be applied for the rapid detection of norovirus in oysters, which can help reduce the cost and time of detection and improve detection rates.

scholarly journals FACT- Frankfurt adjusted COVID-19 testing- a novel method enables high-throughput SARS-CoV-2 screening without loss of sensitivity

2020 ◽  
Author(s):  
Michael Schmidt ◽  
Sebastian Hoehl ◽  
Annemarie Berger ◽  
Heinz Zeichhardt ◽  
Kai Hourfar ◽  
...  
Keyword(s):  
False Negative ◽  
Significant Loss ◽  
Single Sample ◽  
The Novel ◽  
Professional Groups ◽  
Hands On ◽  
Sample Testing ◽  
Novel Method ◽  
Low Probability ◽  
Set Up

AbstractBackgroundIn the pandemic, testing for SARS-CoV-2 by RT-PCR in one of the pillars on which countermeasures are based. Factors limiting the output of laboratories interfere with the effectiveness of public health measures. Conserving reagents by pooling samples in low-probability settings is proposed, but may cause dilution and loss of sensitivity.MethodsWe tested an alternate approach (FACT) by simultaneously incubating multiple respiratory swabs in a single tube. This protocol was evaluated by serial incubation of a respiratory swab in up to 10 tubes. The analytics validity of this concept was demonstrated in a five-sample mini pool set-up. It was consequently applied in the testing of 50 symptomatic patients (five-sample pools) as well as 100 asymptomatic residents of a nursing home (ten-sample pools).ResultsSerial incubation of a respiratory swab in up to 10 tubes did not lead to a significant decline in viral concentration. The novel FACT-protocol did not cause a false negative result in a five-sample mini-pool setup, with non-significantly differing Ct values between single sample and mini-pool NAT. In two routine applications, all mini pools containing positive patient samples were correctly identified.ConclusionsOur proposed FACT-protocol did not cause a significant loss in analytic or diagnostic sensitivity compared to single sample testing in multiple setups. It reduced the amount of reagents needed by up to 40%, and also reduced hands-on time. This method could enhance testing efficiency, especially in groups with a low pretest-probability, such as systemically relevant professional groups.

scholarly journals Balloon-borne limb profiling of UV/vis skylight radiances, O<sub>3</sub>, NO<sub>2</sub>, and BrO: technical set-up and validation of the method

2005 ◽  
Vol 5 (5) ◽  
pp. 1409-1422 ◽  
Author(s):  
F. Weidner ◽  
H. Bösch ◽  
H. Bovensmann ◽  
J. P. Burrows ◽  
A. Butz ◽  
...  
Keyword(s):  
Trace Gas ◽  
The Novel ◽  
Atmospheric Parameters ◽  
Near Ir ◽  
Solar Occultation ◽  
Novel Method ◽  
Gas Measurements ◽  
Set Up ◽  
Radiative Transfer Modeling

Abstract. A novel light-weight, elevation scanning and absolutely calibrated UV/vis spectrometer and its application to balloon-borne limb radiance and trace gas profile measurements is described. Its performance and the novel method of balloon-borne UV/vis limb trace gas measurements has been tested against simultaneous observations of the same atmospheric parameters available from either (a) in-situ instrumentation (cf., by an electrochemical cell (ECC) ozone sonde also deployed aboard the gondola) or (b) trace gas profiles inferred from UV/vis/near IR solar occultation measurements performed on the same payload. The novel technique is also cross validated with radiative transfer modeling. Reasonable agreement is found (a) between measured and simulated limb radiances and (b) inferred limb O3, NO2, and BrO and correlative profile measurements when properly accounting for all relevant atmospheric parameters (temperature, pressure, aerosol extinction, and major absorbers).

A Study of N Heterocyclic Compound as a Potential Lubricating Oil Additive

2011 ◽  
Vol 239-242 ◽  
pp. 2698-2702
Author(s):  
Ping Ouyang ◽  
Xian Ming Zhang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Ball Bearing ◽  
Liquid Paraffin ◽  
Tribological Performance ◽  
Lubricating Oil ◽  
The Novel ◽  
X Ray ◽  
Steel Balls ◽  
Lubricating Oil Additive

Lauric acid-N-quinazolin-4-one methylester was synthesized as potential lubricating oil additive. The friction and wear behaviors of the synthesized compound as an additive in liquid paraffin on 12.7mm diameter steel ball bearing specimen were evaluated with a four-ball machine. The worn surfaces of the steel balls were observed using a scanning electron microscopy and X-ray photoelectron spectroscopy. It was found that the novel compound as an additive in liquid paraffin was effective in improving the tribological performance.

A Study of (N-octylic acid)-N-Quinazolin-4-One Methylester as an Oil Additive

2011 ◽  
Vol 291-294 ◽  
pp. 1496-1499
Author(s):  
Ping Ouyang ◽  
Xian Ming Zhang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Ball Bearing ◽  
Liquid Paraffin ◽  
Tribological Performance ◽  
Lubricating Oil ◽  
The Novel ◽  
X Ray ◽  
Steel Balls ◽  
Lubricating Oil Additive

(n-octylic acid)-N-quinazolin-4-one methylester was synthesized as potential lubricating oil additive. The friction and wear behaviors of the synthesized compound as an additive in liquid paraffin on 12.7mm diameter steel ball bearing specimen were evaluated with a four-ball machine. The worn surfaces of the steel balls were observed using a scanning electron microscopy and X-ray photoelectron spectroscopy. It was found that the novel compound as an additive in liquid paraffin was effective in improving the tribological performance.

A novel method for the determination of linting propensity of paper

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 9-17
Author(s):  
ALESSANDRA GERLI ◽  
LEENDERT C. EIGENBROOD
Keyword(s):  
Ash Content ◽  
The Novel ◽  
Offset Printing ◽  
Excellent Correlation ◽  
End Conditions ◽  
Bottom Side ◽  
Novel Method ◽  
Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

On the Influence of the Slot Orifice in Diesel Common Rail Nozzle

2018 ◽  
Vol 11 (1) ◽  
pp. 55-69 ◽  
Author(s):  
Giancarlo Chiatti ◽  
Ornella Chiavola ◽  
Fulvio Palmieri ◽  
Roberto Pompei
Keyword(s):  
Cross Section ◽  
Flow Rate ◽  
Experimental Analysis ◽  
Common Rail ◽  
Spray Angle ◽  
The Novel ◽  
Hydraulic Behavior ◽  
Reference Information ◽  
Light Duty ◽  
Set Up

Background:The paper deals with a diesel common rail nozzle in which a novel orifice layout is implemented.Objective:Its influence on the nozzle mechanical-hydraulic behavior and on the spray shape transient development is experimentally investigated.Methods:In the research, a solenoid injector for light duty diesel engines is equipped with the novel nozzle prototype and tested. The prototype layout is described, pointing out the features of the nozzle orifices, in which a Slot cross-section is adopted; the investigation is accomplished extending the hydraulic tests and the spray visualizations to a reference nozzle with standard holes. The influence of the hole layout on the mechanical-hydraulic behavior of the nozzle is assessed by experimental analysis based on the rate of injection measurement, in comparison with the reference nozzle. Once the hydraulic behavior of the novel nozzle has been characterized in terms of mass flow rate, the slot influence on the spray shape is assessed analyzing the macroscopic features such as the penetration distance and the spray angle, in non evaporative conditions. The study is carried out under transient injection conditions, for different injection pressures, up to 1400 bar.Results:The results on spray characteristics also provide reference information to set up spray models suited to take the Slot orifice into account.

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