نتایج جستجو برای: optimal economic extraction

تعداد نتایج: 826343  

Journal: :اقتصاد و توسعه کشاورزی 0
حسین زاد حسین زاد جوادی جوادی حیاتی حیاتی پیش بهار پیش بهار دشتی دشتی

abstract the use of water sources has increased due to extend of agricultural activity for answering food needs of increasing population. while because of exploitation and consumption of water, the use of this restricted resource is not appropriate. consequently in many districts of country the head level of ground water aquifers have been fallen and water level is negative. so, application of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه شیمی و مهندسی شیمی ایران - پژوهشکده شیمی تجزیه و معدنی 1390

hydrochlorothiazide (hct) is a diuretic agent which is shown to be effective in the treatment of hypertension. literature reports have demonstrated that urinary excretion data may be used to assess the bioavailability of various formulations containing this thiazide. also hct consumption by the athletes is one of the drugs which should be regulated by world anti-doping agency (wada), because of...

Journal: :اقتصاد و توسعه کشاورزی 0
صبوحی صبوحی مجرد مجرد

abstract atrak basin is an agricultural area in north khorasan province that the most farmers are using from groundwater resources for irrigation their crops. decreasing rainfall in recent years in this area, competition between urban, agriculture and industrial consumers has increased for water acquisition. in present study, game theory was applied for groundwater resources management of atrak...

2017
Yajie Tian Yingsa Wang Yunyun Ma Pengbo Zhu Jing He

The subcritical water extraction (SWE) is a high-efficiency and environment-friendly extraction method. The extraction of resveratrol (RES) of grape seeds obtained from the wine production process was proposed using subcritical water extraction (SWE). The effects of different extraction process parameters on RES yield were investigated by single factors. Extraction optimization was conducted us...

Journal: :iranian journal of environmental sciences 0
pardeep singh department of chemistry, indian institute of technology (bhu), varanasi, 221005, india a. borthakur centre for studies in science policy, school of social sciences, jawaharlal nehru university, new delhi 110067, india r. singh institute of environment and sustainable development, banaras hindu university (bhu), varanasi, india sh. awasthi department of chemistry, indian institute of technology (bhu), varanasi, 221005, india d.b. pal department of botany, banaras hindu university (bhu), varanasi, india p. srivastava department of chemical engineering & technology, indian institute of technology (bhu), varanasi, india d. tiwary

this study presents the natural dye recovery from various biodegradable temple and household wastes. the raw material for colour extraction consisted residual flowers and garlands from various temples as well as onion and vegetables peels from vegetable markets, university hostels, and households, which were washed, dried, crushed, and sieved. the extracted natural colours were produced by mean...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده برق و کامپیوتر 1391

در سیستمهای قدرت امروزی یکی از مهمترین مسائل مانیتورینگ online سیستم بمنظور حفظ شرایط کارکرد نرمال و نزدیک کردن سیستم به شرایط کارکرد بهینه می باشد. تمامی توابع کاربردی موجود در سیستمهای مدیریت انرژی از قبیل فلوی توان بهینه (optimal power flow )، توزیع بار اقتصادی (economic dispatch ) و... داده های مورد نیاز خود را از تخمین گر حالت دریافت می کنند. به بیان دیگر تخمین گر حالت را می توان به عنوان ...

2016
Jin Woo Lee Eun Jin Mo Ji Eun Choi Yang Hee Jo Hari Jang Ji Yeon Jeong Qinghao Jin Hee Nam Chung Bang Yeon Hwang Mi Kyeong Lee

BACKGROUND Extraction conditions greatly affect composition, as well as biological activity. Therefore, optimization is essential for maximum efficacy. METHODS Korean Red Ginseng (KRG) was extracted under different conditions and antioxidant activity, extraction yield, and ginsenoside Rg1 and phenolic content evaluated. Optimized extraction conditions were suggested using response surface met...

1999
Christian Friis Bach

The main purpose of this article is to evaluate different policy options for promoting low-impact logging through the use of economic incentives. To do this we construct a small optimal control theory model within an integrated framework including both the biological and the economic implications of timber extraction. The approach uses detailed stock, yield and cost data from Ghana. A numerical...

2014
Chikara Nakahata Kazuhiro Aruga Masashi Saito

Optimal bucking methods were applied to two operational sites of the Nasu-machi Forest Owners’ Co-operative to maximize profits, with and without taking log size into consideration, and to maximize revenues considering a new subsidy system and higher unit prices of smallsized logs. Corresponding optimum extraction rates and small-sized log prices were examined. Extraction rates from stands usin...

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