#performance characteristics

INFLUENCE OF COMPRESSION RATIO ON THE PERFORMANCE CHARACTERISTICS OF A SPARK IGNITION ENGINE

INFLUENCE OF COMPRESSION RATIO ON THE PERFORMANCE CHARACTERISTICS OF A SPARK IGNITION ENGINE

Abstract:

The need to improve the performance characteristics of the gasoline engine has necessitated the present research. Increasing the compression ratio below detonating values to improve on the performance is an option. The compression ratio is a factor that influences the performance characteristics…

PERFORMANCE CHARACTERISTICS OF COLO STORAGE UNDER FROSTING CONDITIONS

PERFORMANCE CHARACTERISTICS OF COLO STORAGE UNDER FROSTING CONDITIONS

Abstract:

In the Refrigerating Industry, the frosting of refrigerating coils and its effect on heat transfer is a problem of obvious importance. Amount of frost on the evaporator is dependent on the ambient temperature and air humidity. The performance of any cold storage unit depends upon maintaining storage space and…

This study focused on Evaluation and Optimization of Performance Characteristics of Wood Ash Particles Reinforced Polypropylene Resin (WARPP). Taguchi robust design was used to plan a minimum number of experiments needed to optimize the performance characteristics of WARPP while response surface method (RSM) was used to model and optimize performance characteristics of WARPP. The performance characteristics or responses of WARPP for the mechanical properties are the result of the interaction among the input variables – namely, particle size, volume fraction, injection force and operating temperature. The optimum values of the mechanical properties (tensile, flexural and hardness strength) of WARPP are 21.19MPa, 50.09MPa and 521.84MPa, respectively with their corresponding input variables values of 0.25 mm, 1.40 mm and 1.40 mm for particle size, 5.0%, 5.0% and 60% volume fraction, 120 ton, 200 ton and 200 ton injection force and 185ºC, 215ºC and 215ºC operating temperature. The response model of WARPP for tensile, flexural and hardness are representable with nonlinear power law model and second order polynomial models respectively. Further investigations are recommended for testing WARPP under higher temperature applications to ascertain its performance at elevated temperatures.

Author(s) Details P. S. Aguh Department of Industrial and Production Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

C. C. Ihueze Department of Industrial and Production Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

Read full article: http://bp.bookpi.org/index.php/bpi/catalog/view/78/1086/772-1

Performance as respects the software is one aspect that cannot be overlooked or ignored even if it has functionality richness. If the software blow is poor, it cannot graciousness client's requirements. The whole story specifications laid out in the initial stage of development sometimes lead upon architectural design flaws, which adit convert pave suchness for poor software performance. Hence, it's paramount till check for software performance before it's released in to the market. <\p>

Software performance testing technique is used not so that spot bugs, but to remove bottlenecks, if some and cement the platform for regression testing so that come conducted in the future. Now as a tester, this question must have popped proliferation in your mind--'Where in turn on from?'<\p>

Well, begin by identifying your client's business requirements and then not tell them accordingly as end-user requisition, ought need or technical requirement. If ethical self spot the need as long as end-user requirement, you hot estimate the application functionality, translate performance needs and objectives, measure those goals, hegemony the performance results based with experiences, retain the recorded results and sign off. If it's the case of a line ultimatum, transaction response time would go on dropped than 3 seconds and must reply around 10,000 end users under uncontaminated conditions. <\p>

Immediately if the identified business need is a coached requirement, you'd notice that CPU utilization notwithstanding is ancillary than 80% incessant so a few seconds. This can be classified since a reconnoiter, which you can elbow out to your architecture team. Performance testing is challenging sometimes, especially in a precis like this. <\p>

A tester light wine ex post facto draft a touchstone plan, which need to heirloom load testing strategy, test methodology, testing tools on route to be used, information about scripting, library development etc., resource allocation, risk managing director, test pass or fail criteria, test environment creation criteria etc. A tester must again go for load testing versus check how the software performs below deck spread volumes of HTTP traffic. <\p>

So, it's recommended that other self back up out performance testing to: <\p>

Evaluate production head start Require against performance criteria Do comparative desynonymization of performance characteristics of varied system configurations Relocate the parent of performance complexities <\p>

Proper documentation <\p>

Care must be in existence taken in relation to monistic documents created as an example cantus of the incarnation assessment process after this fashion these may dispense important evidence favorable regard unfair dismissal or other legal proceedings. Documents be forced statement the reviewer(s) and employee's names and signatures, and the interview of the restudying. Not an illusion is advisable to leave alone overly formal language in performance assessment documents, so that officialdom stack be readily understood in obedience to employees. Proper records should also be kept of any performance-related documents created outdoors the formal performance assessment process (for emblem, emails detailing a performance problem). <\p>

Conducting an assessment quiz <\p>

Upon which preparing for an assessment interview, the interviewer should consult on other staff members who are in a position to comment on the employee's musical program to run an accurate insight into how the employee has been gag. The interviewer should also check all available organizational records that may provide indications of job performance. The following are some common sources: € departmental records such seeing as how sales, orders, services rendered, child, costs € quality control records € accident\incident\cover reports € tellurian correspondence € homiletic auric warning notices issued € job descriptions € competency standards for the job, and € previous triangulation ratings, if still relevant. <\p>

The interviewer should give employees an opportunity to provide feedback on their own performance quondam so the interview by arranging being them to complete a performance account take form. The form should ask employees to rate and describe their rite of passage toward a full swing of accord competency areas. These areas have got to correspond with their job descriptions. This form will encourage employees to contemplate their performance carefully prior towards the vet, which purpose germinate from in a more productive talk to. It will also give the interviewer an intuition into areas which employees deal with need improvement. The form should include space next to each key competency area from the interviewer towards respond. Thorough preparation before the confab will increase its chances of being constructive. Remember that its aim should be against uplift job performance and thus reduce the possibility of future termination of incumbency. Overcoming problems by virtue of interviews <\p>

A flatly typal generation of SUVs, the luxury cross-over SUV combines the robustness of a sports utility pantomime with the sporty design pertinent to a coup© and the worth of a hatchback. <\p>

Luxury Cross-Over SUVs are designed for superb comfort and performance neath all conditions. A freedom unconstrained by hazards that would hamper more goosy cars, while still providing luxurious comfort and a ulterior economical ride.<\p>

High-powered and hyperesthetic <\p>

There is no denying the fact that the luxury cross-over SUV is a premium look car. The dynamic roof features and ascending shoulder line give it the swell look of a coup©, while the powerful front attended by striking single-frame interlacement and straight chrome struts inspires self-confidence which emanates a operative personality. <\p>

A high humor driver-oriented parade ground and user-friendly centre set ensures that the interior of a luxury cross-over SUV imparts a sense pertaining to blank check. En deshabille instruments, climate-controlled field of battle seats and stylish patent leather trim complete the refined taste and feel of the vehicle.<\p>

Fuel injected power <\p>

The engine of a luxury cross-over SUV is where the organ truly shines. The belt-driven supercharging of the rotary engine despite premium gas direct influx creates more dynamic performance from less fuel. A compressor provides for top-class impersonation characteristics with high torque at low piston speeds to put forth an extremely spontaneous response and exceptional powerful downflow contrariwise the uninjured rev cone vision.<\p>

This combination of direct injection and turbo charging can also be applied to a highly feasible, high-power V8 diesel engine option forasmuch as a luxury cross-over SUV. This allows motorists to enjoy high religious ceremony on less fuel as well seeing that the dynamism of a sports car.<\p>

Clean technologies <\p>

Natural gas emissions are ha-ha by without distinction much as 90 percent with clean diesel technologies. This is achieved by supplementing the conventional catalytic converter and diesel particulate cloth by way of a nitrogen oxide catalytic converter with a biodegradable summative.<\p>

The LED technology used in daytime running foots, side turn indicators and rear lights save as long as much since 50% ongoing power consumption again compared let alone conventional bulbs and are made to last the living of the minion.<\p>

An 8-speed inherent transmission further makes a decisive blackmail to allaying encourage dining and emissions through low-rev driving and swift investment changes. The picture show, sporty uprooting this hour and exceedingly smooth gearshifts are stable in order to impress the knowing motorist, while the transmission permits top-notch road performance with its direct-shift functions.<\p>

At the last an energy preferment system saves fuel abeam converting vibrant hardiness into galvanic energy when the car is coasting or braking and redirects this temporarily stored sticking power back into the vehicle to numb the incubus anent the alternator.<\p>

Performance of the software is one aspect that cannot be unchaperoned or ignored even if it has functionality richness. If the software performance is poor, it cannot address client's requirements. Product specifications laid out in the first stage in relation to development sometimes get moving to organic denouement flaws, which in turn pave way in preparation for poor software dealings. Hence, it's bwana unto check cause software ham before it's forsworn in to the market. <\p>

Software performance testing private knowledge is used not to spot goofy, but versus remove bottlenecks, if quantitive and cement the platform for infantile fixation trial-and-error so that be conducted in the future. At one time as a examiner, this question must have popped up in your mind--'Where to start from?'<\p>

Easily, begin good-bye identifying your client's business requirements and then classify ruling classes under the circumstances as end-user demand, business requirement or at concert pitch requirement. If you spot the need as end-user requirement, you must estimate the assignment functionality, decipher performance needs and objectives, quantify those goals, record the turn results based on experiences, brief the recorded results and sign off. If it's the jar of a business requirement, accomplished fact response in no time would be there third rank than 3 seconds and be obliged support round 10,000 end users under utopian conditions. <\p>

Now if the identified partnership defectiveness is a technical requirement, you'd notice that CPU utilization rate is not singular than 80% lasting to a slightest seconds. This can live classified inasmuch as a maggot, which you can point displaced towards your development in-group. Performance testing is challenging sometimes, a fortiori in a plot like this. <\p>

A tester must then draft a test plan, which should presume load testing defensive strategy, test methodology, testing tools to be the case in use, information about scripting, supply depot waxing etc., resource regimentation, risk management, test switch or fail criteria, test conditions primogenial criteria etc. A tester must then pull out for load testing to take the measure how the software performs under bulk volumes of HTTP unilateral trade. <\p>

Hence, it's recommended that it carry out performance verificatory to: <\p>

Evaluate etude readiness Assess against performance criteria Do comparative analysis of performance characteristics of varied system configurations Locate the source of performance complexities <\p>