Hidden Trouble Research Articles

P‐93: Development of Flexible display for a Pen‐drop Function

Folding screen as the display benchmark of the new era, provide consumers with great portability as the size of diversified changes. at the same time, due to the need to meet the folding characteristics, the flexible material in the screen replaced the original rigid material, thus the hidden trouble caused by the flexible material also appeared. Among them, the cover plate materials led by CPI and PET are the preferred materials for folding screens. Due to the low rigidity of polymer material, it has good flexible folding and poor impact resistance. BOE has done research on improving the pen drop characteristics of flexible folding screen.

Analysis and Prevention of Common Hidden Trouble in Gynecological Nursing

Analysis and Prevention of Common Hidden Trouble in Gynecological Nursing

Safety Hidden Trouble and Prevention of Nursing in Neurology Department

Safety Hidden Trouble and Prevention of Nursing in Neurology Department

Imbalance and breakout in the post-epidemic era: Research into the spatial patterns of freight demand network in six provinces of central China.

This study aims to explore the freight demand network spatial patterns in six provinces of central China from the perspective of the spread of the epidemic and the freight imbalance and breakout. To achieve this purpose, the big data of “cart search” demand information provided by small and medium freight enterprises on the freight information platform are analyzed. 343,690 pieces of freight demand big data on the freight information platform and Python, ArcGIS, UCINET, and Gephi software are used. The results show that: (1) The choke-point of unbalanced freight demand network is Wuhan, and the secondary choke-points are Hefei and Zhengzhou. (2) In southern China, a chain reaction circle of freight imbalance is formed with Wuhan, Hefei, and Nanchang as the centers. In northern China, a chain reaction circle of freight imbalance is formed with Zhengzhou and Taiyuan as the centers. (3) The freight demand of the six provinces in central China exhibits typical characteristics of long tail distribution with large span and unbalanced distribution. (4) The import and export of freight in different cities vary greatly, and the distribution is unbalanced. This study indicates the imbalance difference, chain reaction, keys and hidden troubles posed by the freight demand network. From the perspectives of freight transfer breakout, freight balance breakout, freight strength breakout, and breakout of freight periphery cities, we propose solutions to breakouts in the freight market in six provinces of central China in the post-epidemic era.

Unraveling the formation mechanism of hydrogenated vacancy at γ-Ni/γ'-Ni3Al phase interface and its roles in interfacial stability and strength

γ/γ' phase interfaces are hidden troubles that threaten the service safety of Ni-based single crystal superalloys due to their thermodynamic instabilities and lower mechanical strengths. To gain insights into the role of hydrogenated vacancy in the stability and cohesion of γ/γ' interfaces, the formation mechanism of hydrogenated vacancy at (001) γ-Ni/γ'-Ni3Al interface and its influences on interfacial stability and fracture strength were systematically studied by using first-principles calculations. Our results show that the short-range interplay between monovacancy and single hydrogen atom at (001) γ-Ni/γ'-Ni3Al interface causes the formation of Vac-H complex structure (i.e., hydrogenated vacancy) as separated by a certain distance rather than a direct recombination. The hydrogen atom in the first nearest-neighbor interstices of Ni vacancy (site 6) deviates from the interstitial centers to the vacancy, owing to the interattraction between monovacancy and hydrogen atom. The formation of hydrogenated vacancy at (001) γ-Ni/γ'-Ni3Al interface can promote the interfacial thermodynamic stability as compared with the vacancy-containing γ/γ' interface, but weaken the interfacial fracture strength and change the preferable fracture place of γ/γ' interface. The underlying mechanisms of stabilizing and weakening effects on the γ/γ' interface were revealed by using spin-polarized density of states and differential charge densities.

Improvement strategy of overcharging characteristics of a new type lithium iron phosphate battery in substation

In order to solve the hidden trouble for the long-term overcharging condition of lithium iron phosphate batteries, it is urgent to develop overcharging protective lithium iron phosphate batteries. A strategy combining autonomous equalization technology and passive equalization technology is proposed in this paper to improve the overcharging characteristics of lithium iron phosphate batteries. A certain proportion of oxidizing reductant is added to the electrolyte of ordinary lithium iron phosphate battery. And a comparative test is conducted between conventional lithium iron phosphate battery module and self-equalization lithium iron phosphate battery module in continuous overcharging state. The test results show that the proposed comprehensive strategy has reduced the voltage difference between the cells significantly, and the single cell voltage difference is small in the long-term overcharging process, so as to maintain the safe voltage level.

1032: Hidden Trouble: Pulmonary Vein Thrombosis Disguised as Shortness of Breath

Ahmed, Nayab1; Mahmood, Riaz2; Freyre, Joseph3; Herrera, Martin4; Field, Wesley5; Arfoosh, Rami6 Author Information

Classification Control and Hidden Trouble Checking of Safety Risk in Chemical Enterprises

Classification Control and Hidden Trouble Checking of Safety Risk in Chemical Enterprises

The Impact of Marine Environment on the Flight Safety of Marine Surveillance Aircraft and Countermeasures

Zhang, B.; Liu, S.-S.; Guo, H.; Zhu, L.; Wang, Y., and Liu, J.-X., 2020. The impact of marine environment on the flight safety of marine surveillance aircraft and countermeasures. In: Qiu, Y.; Zhu, H., and Fang, X. (eds.), Current Advancements in Marine and Coastal Research for Technological and Sociological Applications. Journal of Coastal Research, Special Issue No. 107, pp. 113-116. Coconut Creek (Florida), ISSN 0749-0208.In recent years, high-precision aircraft electronic equipment has been put into use, playing an irreplaceable role in aviation law enforcement in the Marine environment. Marine surveillance aircraft are based at coastal airports all the year round and mainly perform maritime flight missions. In recent years, it has become the norm for maritime surveillance aircraft to go to sea or stay on the island. At the same time, if the equipment operation and maintenance personnel do not find the hidden trouble in time during the inspection, resulting in the sudden breakdown of the aircraft in the air, it will seriously endanger the safety of maritime surveillance aircraft and the completion of law enforcement tasks. Therefore, it is very important to pay attention to the environmental anti-corrosion work of airborne equipment. The atmospheric environment of high temperature, humidity and high salt is more serious to the corrosion of aircraft instruments.

Research on vulnerability assessment technology of power consumption based on data analysis

In this paper, an evaluation model for the vulnerability of power consumption in enterprises is proposed. Firstly, we establish the customer electricity vulnerability index system, which includes the organizational structure, hidden trouble and optimized power consumption. Then, we calculate the index weight and assignment based on the analytic hierarchy process (AHP). And the comprehensive index method is employed to get the customer electricity vulnerability. At last, an example is employed to show our results clearly.

Analysis on the contact force behaviors among strands of CICC conductor cross section

International Thermonuclear Experimental Reactor (ITER) hopes to achieve controllable thermonuclear fusion by constraining the motion of high temperature plasma by a strong magnetic field which is generated by superconducting magnets wound by the cable-in-conduit conductors (CICCs). The CICC structure is complex, usually with thousands of NbTi/Cu or Nb3Sn/Cu twisted in four or five stages. It operates in a complex environment of extremely low temperature, high current and strong magnetic field. The electromagnetic force generated by the superconducting material will cause deformation, reduce its characteristic parameters and bring hidden trouble to the safety of the device. Traditional studies on the contact force of the cross-section strand of CICC mostly adopt non-actual object photoelastic model in the experiment, and numerically adopt discrete element method (DEM) without particle deformation. However, it is difficult to give the contact force of the cross-section strand closer to the real working condition. In this experiment, the deformation characteristics were calculated between strands of the prototype of CICC by spraying speckle on the cross-section and using digital image correlation (DIC). Theoretically, taking the strand deformation obtained by DIC as the input parameter of granular element method (GEM), the distribution characteristics of the contact force of the CICC conductor under the action of transverse pressure are calculated, and the size and direction of the contact force chain are statistically analyzed.

Research and Application on the Power Transmission and Transformation Equipments’ Fault Diagnosis Method Based on Online Monitoring

How to ensure the safe and stable operation of power system is one of the key tasks that need to be solved urgently in power department at present, and the fault factors such as normal operation and condition maintenance of power transmission and transformation equipment determine the safety of power system. In order to solve the fault diagnosis method of transmission and transformation equipment, improving the efficiency of equipment condition maintenance and improving the ability of fault discrimination is one of the main solutions. In this paper, through the equipment state evaluation and fault early warning based on-line monitoring, a variety of inspection measures are fully considered through the model, so as to predict the equipment with hidden trouble and put forward the fault early warning.

A Predictive Model of Mining Collapse Extent and Its Application

To reveal the mechanical behavior mechanism of collapse and to control risks effectively, the instability extent of the collapse area was established through theoretical mechanics and numerical methods, taking one metal mine as a case study; on this basis, a routine reinforcement program was determined, and the effect of the program was evaluated. The results show the following. (1) Analytical formulas of the critical slip angle and the collapse height of the ore body were derived by the mechanics method, and the rock mechanics parameters were obtained by field coring and physical and mechanical experiments. The slipping line angle increases along with uniform force Q and is inversely proportional to the bending stiffness. Meanwhile, the calculation formula for the maximum subsidence of ore body was deduced. (2) Numerical results can be used to determine the basic form of the collapse area, and a “U‐shaped” collapse area formed when a plastic area passed completely through, resulting in the overall destruction. (3) The grouting reinforcement program includes “determining the instability region ⟶ roadway temporary support ⟶ improve the water environment and surrounding rock bearing capacity ⟶ mining planning” which were determined on the basis of prediction. (4) The hierarchical structure of the rock body and filling were improved combined with the Delphi method, and the grouting effect evaluation model was constructed and verified using the improved FD‐AHP method; the evaluation value indicating that the grouting reinforcement improved the bearing capacity of ore body and filling body in collapse area. The research results provide systematic reference and technical support for the analysis of stope collapse mechanism, prediction of hidden trouble, and the subsequent mining.

Effect of Type B Steel Sleeve Rehabilitate Girth Weld Defect on the Microstructure and Property of X80 Pipeline

In recent years, accident caused by girth weld defects is relatively common. The failure mode of girth weld is mostly fracture. It is an effective way to avoid the failure accident of girth weld to find the hidden trouble of girth weld and repair it in time before the failure. The type B steel sleeve is an effective method to repair the girth weld defects. However, quite few works have been carried out on the reliability verification and engineering practice of repairing the X80 pipeline girth welds. Therefore, it is necessary to carry out full-size physical test for engineering and obtain the influence law of welding operation on main pipeline performance, with the aim of reliability of repair quality and service after repair. In the present work, the reliability study of repairing with type B steel sleeve on X80 pipe girth weld defects was verified. The results show that the bearing capacity of the type B sleeve can effectively guarantee the safe operation of the pipeline in the case of leakage from the girth weld. But there are obvious influence on the material properties of the outer surface of the main pipe due to the welding heat. Effects from longitudinal weld seam is smaller than effects from fillet weld. Grain roughening occurred in heat affected zone of fillet weld which results in that the hardness of the main pipe under the fillet weld increased and the yield strength was reduced by 5.5%. Surface cracking occurs during bending test. There is a certain service risk and it should be used under more frequent monitoring than usual.

Test on Noxious Gases in Urban Sewage Pipe Based on Odor Classification

Urban sewage pipes are filled with flammable, explosive, toxic and other noxious gases, which have brought hidden troubles during system maintenance and operation. To ease these threats to the urban sewage pipeline network, we should perform spot inspection and take some measures against safety risks that may occur on them. But of those, the test of noxious gases is the most challenging. Based on the odor classification method, we take an urban sewage pipe network in Chongqing as a study case for sample collection and spot inspection. The purpose of this paper is to classify and test the methane CH4 and hydrogen sulfide H2S by different methods. Data available from individual supervision spots are compared and analyzed in parallel, in order to explore how to measure these noxious gases and what’s the distribution and concentration change laws of them in urban sewage pipes, hoping to provide the clues to the early warning and safety operation of urban sewage pipeline network.

Thoughts on the procurement and management of research-use reagents and consumables in hospitals

Objective Along with the fast increasing of scientific research capacity, more and more financial funding were available at hospital level, at the same time, the kinds and quantities of the reagents and consumables for scientific research uses are also increased. As a result, procurement risks become a gig concern in hospitals. Thus, how to increase the cost-effectiveness of their financial funds while lowering the risks and hidden troubles are the key issues need addressing urgently. Methods This paper took Beijing Obstetrics and Gynecology Hospital, Capital Medical University as an example, summarized its service conditions of reagents and consumables for scientific research uses in past three years (2014-2016), according to the comparison and analysis of their actual prices with the guiding prices on the same as indicated on the informational procurement platform, to discuss the existing issues and risks. Results Under the current procurement management system of reagents and consumables for scientific research uses, the purchasing price for some items are relatively high. Conclusions This paper specifically proposed some measures and advices on risk prevention and control during the period of transition with the intention to reduce the purchasing cost, increasing the costef-fectiveness of the financial funds, and lowering the risks and hidden troubles in procurements. Key words: Reagents and consumables for scientific research uses; Procurement management; Procurement platform; Information disclosure

Application of SBAR communication mode on safety management in emergency department

Objective To explore the application of SBAR communication culture in emergency department, so as to promote the effective communication between doctors and nurses and ensure the safety of patients. Methods From July 2015 to June 2016, by setting up an emergency SBAR studio, training, implementation and monitoring of the SBAR communication model for medical staff were carried out, and compared the effect of SBAR communication mode before and after the implementation of the medical cooperative attitude scale, the safety attitude scale and the self-made communication satisfaction scale, and counted the incidence of adverse events caused by communication barriers. Results After the SBAR communication mode, the attitude of nursing cooperation (52.06±4.52) score, and the satisfaction of medical staff (65.62±3.84) were significantly improved compared with before (t=10.905, 6.676; P<0.05) , due to communication barriers caused by adverse events and hidden trouble from the previous 50% to decline after the development of the 14.29% (χ2=4.453, P<0.05) . Conclusions SBAR communication mode improves the standardization, accuracy and effectiveness of information in emergency medical communication, and has a significant effect on improving the team cooperation and promoting the safety of patients. Key words: Emergency department; Safety communication; Situation-background-assessment-recommendation communication mode; Information communication

Curative effect of ALA-PDT combined with Quxietang douching in the treatment of cervical HPV infection

Objective To investigate the efficacy and safety of ALA-PDT combined with Quxietang douching in the treatment of cervical HPV infection. Methods 208 female cervical PCR-HPV positive patients were randomly divided into treatment group and control group, each group had 104 cases.The control group received 10% (ALA) in cervical for 3 hours, then red light for 30 minutes once a week, a total of 3 times.Treatment group was given 10% (ALA) in cervical for 3 hours, then red light for 30 minutes once a week, a total of 3 times, and douching vagina with Quxietang, one day at a time, stay 3 weeks.After treatment for 3 months, every month, a cervical PCR-HPV check was conducted, summarized virus removal efficiency. Results The virus removal efficiency of treatment group was 89.42%, that of the control group was 73.08%, the difference was statistically significant (χ2=7.471, P<0.05). The patients in the treatment group had light local mild erythema, swelling, burning pain, without treatment subside. Conclusion ALA-PDT combined with Quxietang douching method is efficient, with mild adverse reactions, the treatment group was better than the control group in removing cervical HPV infection and effectively eliminating the hidden trouble of cervical HPV. Key words: Humom papillmavirus; ALA-PDT; Quxietang; Cervix uteri

Research on the Novel Non-Contact Power Supply System Tuning Methodology based on Fuzzy Neural Network Theory under the Random Load Condition

In this paper, we combine the literature review and technique reports to conduct research on the novel non-contact power supply system tuning methodology based on fuzzy neural network theory under the random load condition. Power supply by noncontact way could increase the flexibility of electrical equipment, eliminates the traditional power supply methods of safe hidden trouble and makes up for the traditional power supply methods because of the existence of electrical connections of the lack of divination. The background harmonic separation of qualitative method is detecting system side and user side common connection point for the size of the harmonic distortion effect. The genetic algorithm with adaptive system, cellular automata, chaos theory and artificial intelligence is considered for the next decade computing technology has a significant impact on the key technology which is adopted by our research to optimize the proposed system. Mathematical analysis and dynamic load change can lead to circuit reactance, so system will deviate from the resonance state. The experimental simulation proves the feasibility and robustness of our proposed methodology. In the near future, more related research will be conducted to optimize and modify the current method.

New Green Building Materials

With our country economy has already came second in the world, urbanization development, but the rapid economic development also brings great hidden trouble, for example, the environmental problems, the population problem, such as water pollution problems. Which is closely related to the construction industry, therefore, make the green building industry, environmental protection and governance environment in China, such as water pollution problem plays an important role. This article is through the introduction to green materials, the classification of the new green building materials to do an overview.