Design ideas on PCB setting up, structure and wiring

April 12th, 2021

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PCB may be the Chinese identify for printed circuit board, also referred to as printed circuit board, printed circuit board, is an vital electronic part, will be the guidance physique of digital parts, may be the service provider of digital parts electrical relationship. Because it is created applying digital printing, it can be termed “printed” circuit board. As being the PCB dimensions needs are getting more compact and smaller sized, the machine density prerequisites are receiving greater and better, as well as the issues of PCB structure is having even bigger and bigger. The best way to attain a large fee of PCB structure and shorten the look time, through which I discuss the PCB preparing, layout and wiring design skills.

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Just before setting up the wiring should be carefully analyzed on the structure in addition since the tool software for watchful set up, that will make the design additional in line with the requirements.

one Decide the number of levels in the PCB

Circuit board dimension and wiring levels need to have being decided early during the style and design. The number of layers of wiring and lamination (STack-up) approach will right have an effect on the wiring and impedance from the printed strains. The size from the board aids figure out the lamination strategy as well as the width in the printed traces to attain the desired structure consequence. At the moment there’s very little expense difference between multilayer boards and it is best to start out the look with more circuit levels and a uniform distribution of copper lay-up.

2 Structure regulations and constraints

To productively full the wiring endeavor, the wiring instrument ought to do the job within just the proper guidelines and constraints. All specific requirements for signal traces ought to be labeled. Every single signal course ought to have a precedence, as well as larger the priority, the stricter the foundations. Guidelines concerning printed line width, highest number of vias, parallelism, signal line interactions and layer restrictions have a fantastic influence within the general performance from the wiring software.

three Format of components

Style for manufacturability (DFM) rules can place constraints on ingredient structure all through optimal assembly. When the assembly office lets ingredient motion, the circuit may be adequately optimized for simpler automated wiring. The rules and constraints described can have an effect on the layout design. The automatic wiring device will only take into consideration just one signal in a time. By placing constraints to the wiring and location the layers on which signal traces is often laid, the wiring software is usually created to perform the wiring as being the designer envisioned.

As an example, for that layout of electricity traces.

The PCB format should really be made to decouple the power supply circuit near each individual related circuit, instead of placed during the energy offer section, normally it will eventually influence each the bypass outcome along with the pulsating recent flowing through the ability and floor lines, producing tampering.

To the electrical power offer path within the circuit, the power supply need to be taken through the closing phase into the entrance phase, and the ability source filter capacitor of the portion really should be organized close to the remaining phase.

For a few major present-day channels, such as within the debugging and tests process to disconnect or measure the current, the present gap ought to be arranged inside the layout of your printed wire.

Also, look closely at the voltage regulator energy provide during the layout, in terms of achievable, organized on the separate printed board. Once the ability offer plus the circuit along with the printed board, within the layout, really should stay away from the voltage regulator as well as circuit components combined layout or make the power offer plus the circuit together with the ground. Since this wiring is not only straightforward to generate interference, and also inside the servicing of your load cannot be disconnected, and after that only cut a part of the printed wire, as a result harmful the printed board.

While at this time, the PCB surface area procedure procedure is not a large improve, as though it is nonetheless a comparatively distant point, nevertheless it really should be observed: the long-term gradual modify will lead to terrific variations. Inside the circumstance of increasing environmental calls, the surface area procedure system of PCBs will definitely bear huge changes in the future.

Essentially the most primary purpose of area remedy would be to assure excellent solderability or electrical homes. As copper in character tends to exist during the method of oxides within the air, it’s not likely to remain as being the unique copper for years, so other treatment options are desired for copper. Although powerful flux can be employed to eliminate most copper oxides in subsequent assemblies, powerful flux alone is not really effortlessly eliminated, hence the industry generally doesn’t use potent flux.

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The four major money-saving technologies for housing loans also need to be house slaves

March 12th, 2021

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For the rigid needs, under the premise of not very good economic strength, they must face the loan problem to buy a house. If you can spend time researching the methods and characteristics of loans to choose a suitable loan plan, you can undoubtedly save more and more real costs of buying a house. So, what are the money-saving tips for buying a house with a loan?

供樓計算機

Choose a different bank.

When borrowers apply for mortgage loans, choosing different banks can achieve different savings effects. In the current housing loan market, foreign banks are becoming more and more localized, domestic banks have a stronger sense of competition, and borrowers have more room for remaining Yu’ebao.

The advantage of domestic banks is that they understand the needs of local borrowers. The loan products they sell are suitable for different groups of people, such as state-owned banks, commercial banks, and agricultural credit cooperatives. The creditworthiness of the borrowing is high, and the business locations such as bank branches are dense. Borrowers are easy to repay. The disadvantage is that the details of some domestic bank loans lack humanized services, the business solution is poorly connected to various departments, and the management system and competitive strategy are not mature.

The advantage of foreign banks is that they have a wealth of housing loan products, one-to-one services are humanized, and there are no restrictions on early repayment. The disadvantage of some housing loan policies is the high barriers to entry for customers. Generally, customers with a certain amount of deposits in the bank are required to solve the housing loan business. The borrower’s qualification review is strict, with few business outlets and low localization.

Mortgage to buy a house.

If you want to save money, the borrower can also choose a mortgage. It is recommended that borrowers who use mortgaged real estate to purchase houses should try not to purchase houses in the form of mortgage loans. This is the monthly salary paid for the mortgage loan and the commercial loan. The interest rate of the commercial loan may be doubled, which will put a lot of pressure on the borrower to repay. Borrowers choose mortgage loans and savings on hand, etc., can avoid the housing policy to a certain extent, and it is safer for borrowers to choose mortgage to purchase in full.

Find out how to repay

Choosing the right repayment method can also save the lender’s money. At present, there are three common repayment methods: equal principal and interest, equal principal, and two-week provision. From the point of view of saving interest, provide biweekly>equal principal>equal principal. The characteristics of the three methods of repayment and the applicants have their own characteristics, and the borrower can choose according to his actual situation.

Use provident funds cleverly.

It is recommended that borrowers who have paid full-month provident fund use provident fund loans as much as possible. When buying a house, the provident fund has obvious advantages. Not only is the low down payment easy to review, but the interest rate also has a certain percentage of preferential policies. When using the provident fund to buy policy housing, not only can you enjoy low interest rates, you can also directly pay the balance in your provident fund account.

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買房那樣選年利率,或許月供越來越低

住宅ローンを購入する利息を計算する方法は?お金を稼ぐ方法は?

住宅ローンの利息を計算する方法は?

What is nitrogen reflow soldering and what’s its functionality?

March 4th, 2021

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Nitrogen reflow soldering would be to fill the reflow oven with nitrogen to be able to prevent air from getting into the reflow oven to avoid oxidation on the ingredient ft all through reflow soldering. The usage of nitrogen reflow soldering is principally to reinforce the standard of soldering, to ensure that soldering occurs in an ecosystem which has a pretty very low oxygen articles (100PPM), which can avoid the oxidation of elements. Thus, the primary difficulty of nitrogen reflow soldering should be to make certain that the reduced the oxygen information, the greater.

smt reflow oven

With the boost in assembly density as well as the emergence of high-quality pitch assembly technological know-how, nitrogen-filled reflow soldering procedures and equipment happen to be developed, which have improved the soldering good quality and yield of reflow soldering, and also have come to be the event direction of reflow soldering.

HELLER1936MK5 nitrogen reflow soldering

The advantages of nitrogen reflow soldering: protect against reduction of oxidation; enhance soldering wetting force, speed up the wetting speed; reduce the era of solder balls, prevent bridging, and acquire much better soldering high quality.

The downside of nitrogen reflow soldering is the clear raise in price tag. This enhanced expense improves with all the sum of nitrogen. When you should access 1000ppm oxygen content and 50ppm oxygen material during the furnace, the overall nitrogen content check is from the matching on the net oxygen written content Analyzer, the oxygen written content take a look at theory is always that the oxygen content analyzer is connected towards the assortment point via nitrogen reflow soldering, and afterwards the gas is gathered. The oxygen content material price is analyzed because of the oxygen content material analyzer to acquire the nitrogen articles purity array. There exists not less than one particular nitrogen reflow soldering gasoline assortment issue, and there are actually greater than a few high-end nitrogen reflow soldering gasoline assortment points. The requirements for soldering products and solutions are different plus the demand for nitrogen is quite distinct.

For your introduction of nitrogen in reflow soldering, a cost-benefit examination must be completed. Its added benefits include product or service produce, high quality improvement, reduction in rework or routine maintenance expenditures, and so forth. A whole analysis frequently reveals which the introduction of nitrogen does not maximize costs, on the contrary , But we can easily reward from it. At the moment, liquid nitrogen is prevalent, and you can find nitrogen turbines, plus the choice of nitrogen is a lot more versatile.

Exactly what is the proper oxygen content material in PPM for nitrogen reflow soldering? Practice has proved the wettability under 1000PPM is excellent. 1000-2000PPM is often applied, but many of the genuine use process utilizes ninety nine.99% or 100PPM nitrogen, and perhaps ninety nine.999% or 10PPM. Some consumers are literally using 98% nitrogen, and that is 20000PPM. Yet another stating is the OSP process, double-sided welding, need to be underneath 500PPM when you can find PTH, and the boost in tombstones is caused with the low printing accuracy.

A lot of the at this time used nitrogen reflow soldering is from the compelled incredibly hot air circulation sort, and it’s challenging to regulate the intake of nitrogen using this style of furnace. There are many strategies to lessen the consumption of nitrogen: one is to reduce the opening region of ??the furnace inlet and outlet. It is very essential to use partitions, roller blinds or similar gadgets to dam the unused component of the inlet and outlet place. One other is to make use of the basic principle which the warm nitrogen layer is lighter than air instead of easy to combine. When creating the furnace, the heating chamber is increased when compared to the inlet and outlet, making sure that a organic nitrogen layer is fashioned from the heating chamber, cutting down the quantity of nitrogen payment and Sustain the necessary purity.

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The legitimate worth of cloud servers

February 24th, 2021

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Cloud server is a buzzword while in the on the web business hosting market currently. Although the worth of cloud servers is simple to check out, these as trustworthiness, overall flexibility and scalability, it is difficult to determine the price of cloud servers. In fact, it could be hard for a few firms to estimate simply how much cloud servers will expense. This stems within the proven fact that cloud servers charge on an irregular basis. At times, when the firm has a large quantity of frequent dynamic workloads, it can be difficult for that corporation to properly forecast their resource requirements.

Cloud Managed Service

Functions of cloud server

The speed and flexibility that cloud servers give organizations allow for them to expand or shrink their resource usage at any time and only pay for whatever they have to have. This enables the corporation to flexibly change to need and give attention to innovation somewhat than infrastructure upkeep.

Certainly, using cloud servers is a organic place to begin for entrepreneurial pursuits, and it’s also a whole new challenge for which you have unproven baseline prerequisites. When you have mysterious demands, cloud computing is the ideal position to run checks or improve startups, nevertheless it also delivers rate uncertainty. Just what exactly is definitely the true value of cloud servers?

Naturally, the cost will range according to the cloud server provider you find yourself using. When picking a provider, it is necessary not only to take into consideration your decision-making pricing. Components these types of as allocating assets, safety as well as customer service levels can all engage in a crucial purpose within your pleasure with all the cloud server expertise.

Private clouds might be more expensive than public cloud servers, nonetheless they may even deliver extra services and features, this sort of as improved security or disaster restoration ideas. Handling a non-public cloud architecture might expense much more than a negligible cloud server, however it is your distinctive means, a lot easier to start out, and a lot easier to deal with.

At the conclusion of the day, the only strategy to definitely work out the fee of cloud servers along with other web hosting alternatives would be to determine your web hosting demands. When comparing the cost of the cloud server in Hong Kong with choices these types of as standalone server rental, it is necessary not merely to incorporate the components price tag, and also to spend some time running the server to secure a accurate comparison value.

Just after managing the data, chances are you’ll notice that the hybrid option may be the best option in your needs. You are able to blend a customizable encounter and exclusive server means with the ability to obtain unexpected operate inside the cloud. The genuine price tag may not be as essential since the worth of the cloud server delivered.

The worth of cloud servers

Using a cloud server is like an open up road to where you need to go. The worth of cloud web hosting may not only be the money spent, even so the ROI could be more than velocity or scalability. The cloud server is the core of innovation and will do the job properly with Pioneer. It enables you to conduct operations which were not possible in the previous, these as massively growing workloads right away with no being affected by physical infrastructure constraints. During the cloud server, we uncovered the price proposition changed from “how much does it price?” to “how much price will it improve?”. The pliability and dependability of cloud servers give a secure foundation for accurate innovation and growth.

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how Hong Kong could be a leader during the battle from weather improve

December 28th, 2020

Hong Kong aims being amongst Asia major metropolitan areas on local climate motion, such as on investigate associated with renewable vitality these as inexperienced hydrogen, in accordance to Secretary for the Environment Wong Kam-sing.Hydrogen, very long touted as being the fuel of the potential, is currently accessible for energy-intensive industries, but only grey hydrogen which is made with methane and releases greenhouse gases is commonly in use.Environmentally friendly hydrogen, generated by using drinking water and renewable electricity, has a short while ago been recognised as a alternative to decarbonising energy-intensive sectors.

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Climate Change Hong Kong: Why Young Minds Need To Focus On Climate Change Discussions And How They Can Take Part.Hong Kong want to be one of the foremost towns in Asia on local weather action and we hope to set an case in point for other metropolitan areas from the region, he mentioned.Solar panels from Hong Kong skyline. The city has pledged to eliminate carbon emissions by 2050.Investigation into new energy sources, new strength vehicles, squander management and environmentally friendly tech and finance was also anticipated to develop thousands of new careers in Hong Kong, he included.Wong spoke for the Submit ahead of a meeting organised jointly before this month by the French consulate along with the Hong Kong College of Science and Engineering to mark the fifth anniversary of your paris Settlement on weather transform.

Hong Kong is one of the 196 signatories dedicated to keeping the increase in international ordinary temperatures to well within just two degrees Celsius previously mentioned pre-industrial degrees.Wong explained the town would seek advice from the Sustainable progress Council (SDC) report on medium-to-long-term decarbonisation and help extra innovation, study and enhancement on zero-carbon electrical power sources, which include inexperienced hydrogen.

The long-delayed coverage report launched last thirty day period via the metropolis environmental advisers urged considering nuclear electricity and renewable strength as possibilities to polluting fossil fuels for ability technology, which contributed sixty five for each cent of Hong Kong emissions in 2017.

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Royal Dutch Shell Plc is selling its Norwegian natural gas supplier Gasnor

December 7th, 2020

As many businesses are transitioning to shift focus to online based, traditional businesses are looking for venue to reduce cost and get m…

As many businesses are transitioning to shift focus to online based, traditional businesses are looking for venue to reduce cost and get more businesses too 低碳.

Shell has explored possibilities to secure funds for deals, of which it is also in talks to sell its Norwegian natural gas supplier Gasnor. Shell took over the company in 2012, paying $74 million for the ownership control of the company. Now, they are looking for ways to transition to low-carbon energy sources as they cut green house emissions in 2019.

The pandemic of 2020 is hitting many fossil fuel companies hard, with many expecting a long term reduction in demand for oil and gas services with logistics-transportation related businesses stymied by regulatory travel restrictions globally.

Currently, Shell is valued at US$115 billion with its share prices down by 48% this year.

寶寶的奶粉可以經常換嗎?

November 19th, 2020

寶寶出生時要特別注意喂奶粉,大小要准確,具體注意事項要在課堂上參考清單。很多時候,媽媽們更換奶粉是因為看到孩子個子不長或者大便變綠、發火,卻沒有意識到換奶粉會給孩子帶來很大壓力。初期更換奶粉會減少攝入量,造成消化不良,有些還會引起嘔吐、腹瀉、便秘等症狀。同時,也要避免一些媽媽僅憑傳聞說某某奶粉好就換奶粉的做法。除了因為偶爾對牛奶過敏而喂食特殊蛋白奶粉外,最重要的是堅持喂同一種奶粉。

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不太推薦食鐵丸,因會會對腸胃造成負擔和嬰兒便秘。在親身體驗方面,如果寶寶喝的是某品牌奶粉,沒有任何不適症狀,就不需要頻繁更換。寶寶的脾胃還很嫩,太頻繁更換奶粉牌子,會導致寶寶腸胃不適,會影響寶寶的消化吸收。即使你想改變,也要根據寶寶的情況來決定,不能操之過急。你應該吃得過多,讓你的寶寶慢慢適應。

奶粉比較:有些狀況比較容易處理,例如肚餓、換尿片等都是比較容易處理的;但見到bb面仔有粒粒都會擔心是否嬰兒敏感或嬰兒濕疹。嬰兒不應該吃太多奶粉。父母擔心他們的孩子會挨餓。喂奶粉的時候,他們總是想把奶粉增稠。甚至有人認為,只要孩子能吃,奶粉越濃越有營養。真的是這樣嗎?事實上,牛奶濃度過高,寶寶的胃腸不能完全吸收,尤其是蛋白質不能被吸收。相反,它會增加嬰兒的胃腸道負擔,導致腹脹、腹瀉和營養吸收障礙。因此,喂給寶寶的奶粉的量必須與寶寶的年齡相適應。

一般配方是:半個月內,每100毫升牛奶中含有約9克奶粉;2個月內含奶粉12克,3個月內含奶粉不超過15克。如果嬰兒奶粉的月攝入量超標,就會出現厭食症,或者變得肥胖。肥胖很容易增加體內的脂肪組織,使心髒負擔過重,導致運動緩慢,活動減少,影響發育。如果是3個月後,寶寶的每日進食量應控制在1000毫升以內。

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Many requirements suitable to helmets are viewable provided

October 29th, 2020

accidents, and crisis vehicle harm at roadway incidents proceed being problematic for crisis companies, and, actually, the quantity of incidents is increasing,” according to Jack Sullivan, director of training for the Crisis Responder protection Institute (ERSI). For years, ERSI has encouraged the usage of fire helmets and high-visibility ppE for personnel doing the job roadway incident scenes.

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Opt for our Flipper machine for inverting PCB in double-sided processing. Equipped with PLC micro computer control, the machines are reliable for production.The helmet advice is based on anecdotal info from firefighters instantly involved in struck-by-vehicle incidents. proposed improvements include earning the responders additional conspicuous by adding fluorescent and reflective markings on their own helmets and offering extra physical head defense.

They are a lot of other attractive features that you will come to know once having the motorcycle specifications explained to you.The roadway accident in Lubbock in January 2020 prodded me down the trail of exploring for just a protecting helmet for roadway operate. I started by demonstrating shots of assorted sorts of helmets to seasoned firefighters and asking them, “If you ended up heading to receive struck by a motor vehicle over a roadway, which helmet would you instead be putting on?” The most popular decisions were being the off-road grime bicycle along with the auto racing helmets. I then requested which helmet could well be the worst possible helmet for this state of affairs. The unanimous respond to was the structural firefighting helmet. proper there and afterwards, I knew I’d a new mission in life. It’s a mission I’d prefer to continue by working with hearth departments, study institutes, laboratories, helmet makers, and benchmarks bodies to build far better head security for crisis responders at roadway incidents.

Allowing remote control and remote access to office resources.The investigate performed for this post was on the incredibly restricted spending budget. The effects of COVID-19 has frozen our price range. Many requirements suitable to helmets are viewable provided that you purchase the typical; therefore, I couldn’t assessment as a lot of helmet criteria as I’d have favored. The helmets analyzed within the roll-off exam were being helmets I owned, borrowed, or received from 1 company. The roll-off take a look at apparatus was crafted predominantly from scrap metallic and economically offered sections.

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The investigation done for this article was with a extremely limited spending plan

花灑明裝和暗裝的哪個好

September 28th, 2020

現在家裝的主要消費人群集中在80、90後年輕人,他們處在高度的工作壓力下,面對繁忙的工作和生活逐漸麻木。傳統的衛浴空間通常給人的印象都是冷冰冰的,缺乏情感共鳴的。但隨著時代的進步,人們對於精神需求的要求越來越高,認識到衛浴空間更是每個人最私密、最放松的空間。而淋浴花灑是我們衛浴間中不可缺少的物品之一,每天拖著疲憊的身軀回到家中後,最幸福的莫過於吃一頓熱騰騰的飯,洗一個舒服的熱水澡。淋浴花灑能給我們消除疲勞,放松身心。

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好用的花灑頭 推介, 您是否正在追求舒爽暢快的沐浴空間?您是否希望在家都可以享受酒店級的豪華淋浴?如果想把每天屬於自己的私人休憩空間昇華,就必須選擇最好的浴室設施。以下3個雨淋花灑套裝及花灑頭推介,絕對能夠把生活提升去更高級的層次。目前我國市面上的淋浴可以大致內容分為明裝與暗裝。兩種淋浴有什麼問題分別呢?今天我們設計師就來和大家進行講解分析一下明裝花灑與暗裝花灑的區別發展以及技術優缺點。花灑明裝和暗裝的哪個好 哪個企業更適合中國現在的衛生間?首先來了解花灑明裝與暗裝的基本理論知識,明裝花灑就是指一個衛生間裝修好之後花灑直接安裝在牆壁上,明裝花灑的花灑供水軟管是露在外面的,這種通過安裝工作方式也比較研究常見。

優點:安裝使用方便、維修人員容易。缺點:占用公共浴室進行空間,視覺效果不美觀;控水主體和供水系統軟管都裸露在牆體外,易發生磕碰。暗裝淋浴花灑就是花灑管道隱藏在牆體材料內部,只露出花灑頭和控制工作開關。此外,暗裝淋浴花灑也分為基於嵌入式頂噴花灑和側噴式功能花灑兩種。優點:不占用浴室以及空間,外觀結構設計更加簡潔自然大方。缺點:施工管理難度相關系數略高,需提早鑿牆預埋管道;後期發展維護自己不方便,檢修技術較為複雜麻煩。重點研究分析不同戶主挑選淋浴花灑明裝與暗裝的四大主要因素:從維護上來說:明裝淋浴花灑更便捷。要是壞了我們可以通過直接卸下來買新的,除了這些小問題的話也可以選擇直接拆換小配件,省心省事的很。要是暗裝淋浴花灑的話,一旦企業出現安全問題,啥都在牆內呢,難修;

從價格上來說:明裝淋浴花灑性價比要求更高。因為工程施工進行簡單,好操作,成本並不高。要是暗裝淋浴花灑的話,安裝使用起來會很麻煩,成本以及相應的就高了,這也是我們不少學生家庭對暗裝花灑望而卻步的原因;從顏值來說:暗裝淋浴花灑更氣派。這個社會問題沒啥爭議,畢竟有很大影響一部分同學朋友自己喜歡暗裝淋浴花灑的原因之一就是通過管線數據可以直接埋在牆裏。明裝的整體式淋浴花灑管件露在牆上會讓人有一種比較雜亂的感覺,看著他們不夠重視高級。

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臨睡前敷美容效果最好

June 15th, 2018

俗話說,一白遮百醜。在這種觀念下,全身的透白自然就成了極致的極致。怎樣可以讓皮膚美白呢?祖宗們不僅給出了要求,還給出了解答的辦法。博大精深的中醫有著一套針對全身不同部位,對症下藥、以內養外的科學美白方案。教你怎樣可以讓皮膚美白呢,下面就一起看看吧!   在東方人的審美觀念中,白,就是最高的標准和最終極的美麗目標。在東方人的審美觀念中,白,就是最高的標准和最終極的美麗目標   身體美白   1、膝部糙黑的食療   維生素A攝入不足時膝部極易出現皮膚幹燥、粗糙、角化和灰暗。   食療辦法:   富含維生素A的食品有胡蘿卜、香蕉、牛奶等。   常飲蘆薈汁可以補充皮膚水分,恢複膠原蛋白功能,從而防止或延緩膝部皮膚的幹皺、生斑,使之保持彈性和嫩白。   2、眼部黑眼圈的食療   如果你經常工作到深夜二三點,早晨8點又要趕緊上班,那么,黑眼圈就會呈現出來。   食療辦法:   洗淨馬蹄與蓮藕,切碎後放入榨汁機,再加兩杯水攪拌。將水隔渣,然後敷跟10分鍾。蓮藕及馬蹄富含粉質、鐵質及蛋白質,有散血去瘀作用。臨睡前敷美容效果最好,可以降低黑跟圈的機會。   或用蜂花粉—茶匙+蜂皇漿—茶匙,混和後在黑眼圈位置薄薄地敷上一層。1小時後以清水去。蜂皇漿含氨基酸,有漂白作用,且有促進新陳代謝之功效。   3、乳部暈黑的食療   隨著女性的成長成熟,由於雌性激素分泌、過度刺激乳頭等關系的影響,都會漸漸變成黑褐色。   食療辦法:   可用肉蓯蓉、杭菊、松子仁各10 g,鴨蛋2只,共煮:待蛋熟敲開一頭再煮,棄渣食蛋。每日服1次。成年女性則宜用人參5 g,蓮子20 g,冰糖10 g,燉1-2小時,隔日1次。   也可用胡桃仁120 g,搗膏,補骨脂、杜仲各120 g,杵勻入前膏,如梧桐子大。服法:空腹溫酒鹽湯吞服50丸。能益血補髓,明目悅心,保濕潤膚紅暈。   4、妊娠紋黑的食療   妊娠紋醫學上名為腺狀萎縮症,是因為懷孕而導致皮膚組織中的膠原蛋白纖維松弛甚至斷裂。且時間愈久,凹陷部位色澤愈深,呈現黃褐色或暗黑色。   食療辦法:   每日早晚應進行按摩並重視營養調配,補充維生素E,常食畜脾、牡蠣等以活化組織細胞,刺激真皮恢複生機,多食豬皮、魚翅、礦膠、豬蹄、牛排等易被人體吸收的富含大分子膠原蛋白纖維的食物,對消除妊娠紋黑的效果極佳。   頸部美白   1、頸部糙黑的食療   中醫學認為:心虧血少,前頸部蒼黃暗淡:肝氣鬱結,後頸部皮膚黑青;脾虛血滯,頸部肌膚黑粗。   核酸是首選的營養食品,日本科學家發現,女性每日服用核酸800 mg,1個月之後,頸部皮膚會變得白嫩誘人。富含核酸的食物有魚、蝦、酵母、肝、蘑菇、木耳、花粉等。   米粥是美頸的傳統膳食,紅棗、粟米具益氣養血、潤膚豐肌的功效,適用於脾虛血弱所致者。   2、腰腹部黑的食療   中醫髒明學認為,脾虧腎虛時,五髒運化精氣的功能失調,使流向腰椎與關節盤的氣血減少,腰腹部便形成一道粗糙松弛的黑膚圈。   傳統膳食中的首烏粳米粥方,具有補氣血、悅膚色、益肝腎之功效,適用於腰腹酸軟、衰痕發黑者。   常吃蠶蛾、幼蟬等昆蟲也有佳效,因為這類美食中含有20多種遊離氨基酸,是理想的肌膚健美物質。   堅持吃穀物、蔬菜、水果,其中所含的鈣、鉀、鈉、鎂等多種礦物質是美肌膚最理想的食物。   3、臂部紫黑的食療   臀部紫黑多見於久坐工作者,或見於患有肝病,坐骨神經症、內分泌疾病以及月經失調者。   維生素E可促進代謝、增加毛細血管的抵抗力,維持毛孔的正常通透性,改善臀部血液循環,平展硬皺,延緩皮膚衰老。故應補充維生素C、E。富含維生素E的食物有乳類、蛋類、芝麻、蜂蜜等。   同時應少食辛辣刺激性食物和酸性食物,並注意日常生活中的坐行交替,保持情緒穩定。   不同部位美白方   1、面部厚黑的食療   中醫學認為面色發黑多為腎虛精血不足所致,可內服六味地黃丸等補腎藥物。   酸棗仁桂圓粥方,適用於心脾氣血不足所致的面膚變厚。   人參山藥粥方,適用於氣衰引起的臉色黯黃;

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