繁殖個體數 的英文怎麼說
中文拼音 [fánzhígètǐshǔ]
繁殖個體數
英文
breeding size-
Centropages tenuiremis is a mainly dominant species in xiamen waters during winter - spring. there is a noticeable character in its life history, that in may and june, when the population of this species begin to reduce gradually, the females could produce diapause eggs with long spines on their surface to over summer - autumn ( from july to november )
瘦尾胸刺水蚤（ centropagestenuiremisthompsen & seott ， 1903 ）是廈門海區冬春季節的主要優勢種，其生活史中一個顯著的特點就是在種群數量逐漸減少的5 6月間，雌體會產出表面遍布長刺的滯育卵，以滯育形式度過不利其生長繁殖的夏秋季（ 7 11月） 。Garbage, dejection and rot materials active and reproductive place forfiics. theirlittle bodies could take a lot of bacteria and pollute your food dishware at any moment, and you are harmed unconsciously by these bacteria weapon
人類最惟恐避之不及的地方（垃圾、糞便、腐爛物）卻是它們活動繁殖的樂園，它們小小的個體可能攜帶著世界上種類、數量最多的細菌，隨著尋找您的食物和餐具「空投」他們的致命炸彈，讓你不知不覺中了細菌武器的傷害。Longgang nature reserve plays an important role in preserving two langur species of both white - headed langur and francois langur. interview and field survey methods were used to survey the distribution and population size of these two langurs in this natural reserve from december 2001 to january 2002. the result indicated that the reserve has 8 groups of white - headed langur with 68 individuals in longrui and 10 groups of francois langur with 75 individuals in longgang. the distribution area and population size of both of the two langurs in this reserve have greatly declined in the past decades. they are seriously threatened and have high risk of disappearance from this reserve if no effective measures are to be taken at once
為了確定弄崗自然保護區內白頭葉猴的種群數量，彌補黑葉猴種群數量的空白，掌握此保護區葉猴的生存現狀，採用訪問法和實地數量統計法相結合的方法對弄崗自然保護區的弄崗、隴瑞和弄呼3個部分進行深入的調查研究.調查結果表明，在隴瑞片范圍內，共有8群白頭葉猴，種群大小在68隻左右，和20世紀80年代末的244隻相比，數量下降相當驚人;在弄崗片內，共記錄到黑葉猴群10群，最大的種群為11隻個體，最小的種群是4隻個體，共計約有75隻黑葉猴（絕對數量統計） ;弄呼的黑葉猴種群已經于上個世紀的晚期消失.造成目前狀況的因素主要是過度狩獵和其他形式的過度干擾.弄崗自然保護區的葉猴種群數量已經接近可持續繁殖種群的最低水平，如不採取有效的保護措施，這個種群將很可能在短期內消失The four psb strains, wst22 sc21 sc42 sx51, grow rapidly and can be conserved for a long time. 2. the resistant function to pathogenic e. coli and salmonella enteritidis of four psb strains was test that they had different function by oxford cup test
Wst22 、 sc21 、 sc42 、 sx514株光合細菌生長較快，在培養基中光照培養3天活菌數即可達到10 ~ 9個/ ml ；存活期長，在液體培養基中保存3個月後將其轉入新的培養基中仍然能夠保持很高的繁殖能力。Hand straps on buses were next with 380 units, followed by bathroom doorknobs at 340. rounding out the list were elevator buttons at 130 colony forming units and hand straps on subways at 86
電梯按鈕上的菌落是130個，地鐵拉手上的菌落個數是86 ，這兩樣物體在細菌繁殖場排名中居后。This thesis suggests a process considered minimizes the population size as similar individuals occur in the fitter members of the population, which helps reduce the execution times for ga by removing the redundancy associated with the saturation effect found in the later generation. this thesis uses a method that adds dynamic penalty terms to the fitness function according to the optimal degree of solutions, so as to create a gradient toward a feasible suboptimal or even optimal solutions. on the basis of the difference of the biggest and the smallest of fitness of individual, modifying the fitness function in order to convergence is a satisfaction
動態調節種群大小，去掉遺傳演算法在迭代後期搜索產生的過多相似個體，達到減少計算時間的目的；按照解的優劣程度給適應度函數增加一個在ga搜索過程中動態改變的可變罰函數，給搜索最優解創造一個梯度，使遺傳演算法收斂到可行的較優解或最優解；根據適應度值最大和最小個體的差修正適應度函數，使適應度函數值適中不容易造成收斂太快、局部收斂或根本不收斂而變成隨機搜索；為了避免「近親繁殖」採用競爭擇優的交叉操作；利用并行遺傳演算法的思想，提出一種自適應多子種群進化策略；提出人口汰新政策來解決類似甚至相同的個體的情況發生。分享友人