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Mathematical function having a characteristic S-shaped curve or sigmoid curve
A sigmoid function is any mathematical function whose graph has a characteristic S-shaped or sigmoid curve. A common example of a sigmoid function is
Sigmoid_function
Topics referred to by the same term
Look up sigmoid in Wiktionary, the free dictionary. Sigmoid means resembling the lower-case Greek letter sigma (uppercase Σ, lowercase σ, lowercase in
Sigmoid
Section of the large intestine closest to the rectum and anus
The sigmoid colon (or pelvic colon) is the part of the large intestine that is closest to the rectum and anus. It forms a loop that averages about 35–40
Sigmoid_colon
neural networks, a hard sigmoid is non-smooth function used in place of a sigmoid function. These retain the basic shape of a sigmoid, rising from 0 to 1
Hard_sigmoid
Indian train tracking application
trains in select Indian cities. The application was originally developed by Sigmoid Labs, a startup founded by former TiVo Corporation engineers, and was acquired
Where_Is_My_Train
Medical condition
Sigmoid colon volvulus, also known as sigmoid volvulus, is volvulus affecting the sigmoid colon. It is a common cause of bowel obstruction and constipation
Sigmoid_colon_volvulus
Digestive disease of the large intestine
America and Europe the abdominal pain is usually on the left lower side (sigmoid colon), while in Asia it is usually on the right (ascending colon). The
Diverticulitis
Twisting of part of the intestine, causing a bowel obstruction
risk. The most commonly affected part of the intestines in adults is the sigmoid colon, with the cecum being the second most affected. In children the small
Volvulus
Last part of the digestive system in vertebrates
the ascending colon to the transverse, the descending and finally the sigmoid colon) is the longest portion of the large intestine, and the terms "large
Large_intestine
Contiguous fold of tissues that supports the intestines
structure, with all named parts—the ascending, transverse, descending, and sigmoid mesocolons, the mesoappendix, and the mesorectum—separately terminating
Mesentery
Pattern seen during radiologic examination
sign observed on abdominal radiographs that specified the presence of a sigmoid volvulus, a form of bowel obstruction. It can be identified on both abdominal
Coffee_bean_sign
Vein channel in the skull
The sigmoid sinuses (sigma- or s-shaped hollow curve), also known as the pars sigmoid, are paired dural venous sinuses within the skull that receive blood
Sigmoid_sinus
Mathematical activation function in data analysis
swish β ( x ) = x sigmoid ( β x ) = x 1 + e − β x . {\displaystyle \operatorname {swish} _{\beta }(x)=x\operatorname {sigmoid} (\beta x)={\frac {x}{1+e^{-\beta
Swish_function
S-shaped curve
A logistic function or logistic curve is a common S-shaped curve (sigmoid curve) with the equation f ( x ) = L 1 + e − k ( x − x 0 ) {\displaystyle f(x)={\frac
Logistic_function
Blood vessels
The sigmoid arteries are 2–5 branches of the inferior mesenteric artery that are distributed to the distal descending colon and the sigmoid colon. The
Sigmoid_arteries
Middle English variant of the letter S
Sigmoid S (Ꟙ ꟙ) is a letter of the Latin script that was commonly used in Middle English, Middle Scots, and Middle Cornish. Everson, Michael (2020-10-01)
Sigmoid_S
Ribbons of smooth muscle along the colon
smooth muscle on the outside of the ascending, transverse, descending and sigmoid colons. They are visible and can be seen just below the serosa or fibrosa
Taenia_coli
Type of activation function
paper: f ( x ) = x ⋅ sigmoid ( x ) , {\displaystyle f(x)=x\cdot \operatorname {sigmoid} (x),} f ′ ( x ) = x ⋅ sigmoid ′ ( x ) + sigmoid ( x ) {\displaystyle
Rectified_linear_unit
Groove in the ramus of the mandible
The mandibular notch, also known as the sigmoid notch, is a groove in the ramus of the mandible. It is the gap between the coronoid process anteriorly
Mandibular_notch
Surgical procedure
Vaginoplasty is any surgical procedure that results in the construction or reconstruction of the vagina. It is a type of genitoplasty. Pelvic organ prolapse
Vaginoplasty
Final portion of the large intestine
(4.7 in) long, and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory
Rectum
Anatomical landmark
The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is in the distal radius, and is narrow, concave, smooth
Ulnar_notch_of_the_radius
American medical television drama series
place patient Claire Burns on the whiteboard, delaying treatment for a sigmoid volvulus until emergency surgery is required, drawing sharp criticism from
The_Pitt
Smoothed ramp function
softplus function is equivalent to the log of the sigmoid function in the following way: − ln ( sigmoid ( − x ) ) = − ln ( 1 1 + e x ) = ln ( 1 + e
Softplus
Fold in the back of the temporal bone
mastoid portion of the temporal bone presents a deep, curved groove, the sigmoid sulcus, which lodges part of the transverse sinus; in it may be seen the
Sigmoid_sulcus
Eighteenth letter of the Greek alphabet
"sigm-" (e.g. sigmodon, sigmurethra, etc.) Derivative "sigmoid" (e.g. sigmoid sinus, sigmoid colon, sigmoidoscopy, etc.) "the same letter, which the
Sigma
Large depression in the upper extremity of the ulna forming part of the elbow joint
trochlear notch (/ˈtrɒklɪər/), also known as semilunar notch and greater sigmoid cavity, is a large depression in the upper extremity of the ulna that fits
Trochlear_notch
Proposed human anatomical structure
rectosigmoid sphincter or sphincter of O'Beirne, is the junction of the sigmoid colon and the rectum. The rectosigmoid sphincter, also known as the sphincter
Rectosigmoid_junction
that, groove for sigmoid sinus continues as groove for transverse sinus. Sigmoid sinus Cancer Web: Sigmoid Sulcus "Groove for sigmoid sinus". http://ect
Groove_for_sigmoid_sinus
Family of interpolation and clamping functions
Smoothstep is a family of sigmoid-like interpolation and clamping functions commonly used in computer graphics, video game engines, and machine learning
Smoothstep
Medical examination of the large intestine from the rectum to the sigmoid colon
intestine from the rectum through to the nearest part of the colon, the sigmoid colon. There are two types of sigmoidoscopy: flexible sigmoidoscopy, which
Sigmoidoscopy
Vein channel in the skull
confluence of sinuses (by the internal occipital protuberance) to the sigmoid sinuses, which ultimately connect to the internal jugular vein. See diagram
Transverse_sinuses
Nineteenth letter of the Latin alphabet
ɕ: 𝼞 𐞺 Ꞅ ꞅ : Insular S Ꟗ ꟗ : Used in Middle Scots Ꟙ ꟙ : Latin letter Sigmoid S was used in medieval palaeography $ : Dollar sign ₷ : Spesmilo § : Section
S
Removal of colorectal polyps to prevent them turning cancerous
Colonic polypectomy is the removal of colorectal polyps in order to prevent them from turning cancerous. Gastrointestinal polyps can be removed endoscopically
Colonic_polypectomy
Area of the cranium containing the brainstem and cerebellum
where the sigmoid sinus becomes the internal jugular vein. Note that a superior petrosal sinus enters the junction of the transverse and sigmoid sinuses
Posterior_cranial_fossa
External opening of the rectum
tissues; its injuries include anal sphincter lacerations and rectal and sigmoid colon (rectosigmoid) perforation, which might result in death. Lubricant
Human_anus
Artificial neural network node function
function is nonlinear. Modern activation functions include the logistic (sigmoid) function used in the 2012 speech recognition model developed by Hinton
Activation_function
Mathematical function conceived as a crude model
activation function. Depending on the task, these functions could have a sigmoid shape (e.g. for binary classification), but they may also take the form
Artificial_neuron
Sexual activity involving the anus and rectum
anal fisting injuries include anal sphincter lacerations and rectal and sigmoid colon (rectosigmoid) perforation, which might result in death. Repetitive
Anal_sex
Sex toy that is designed to be inserted into the rectum
Some plugs are designed (long, flexible and curved) to penetrate the sigmoid colon. Butt plugs are made of a variety of materials, the most common being
Butt_plug
Medical condition
condition arises when ileum loops wrap around the bottom of a redundant sigmoid loop. In some countries in Africa, Asia, and the Middle East, the ileosigmoid
Ileosigmoid_knot
Condition of the wall of the intestine
condition known as diverticulitis. Diverticula typically occur in the sigmoid colon, which is commonplace for increased pressure. The left side of the
Diverticulosis
Type of feedforward neural network
requires that modern MLPs use continuous activation functions such as sigmoid or ReLU. Multilayer perceptrons form the basis of deep learning, and are
Multilayer_perceptron
Class of artificial neural networks
element-wise matrix multiplication, and sigmoid ( ⋅ ) {\displaystyle {\text{sigmoid}}(\cdot )} is the sigmoid function. In other words, the nodes with
Graph_neural_network
Part of the human colon
flexure to the level of the iliac crest (whereupon it transitions into the sigmoid colon). The function of the descending colon in the digestive system is
Descending_colon
Venous channels in the dura mater
sagittal sinus, inferior sagittal sinus, transverse sinus, straight sinus, sigmoid sinus and cavernous sinus. These sinuses play a crucial role in cerebral
Dural_venous_sinuses
Artery
branches go on to form anastomoses with the middle colic artery, and a sigmoid artery (respectively). The left colic artery usually represents the dominant
Left_colic_artery
Organ system within humans and other animals
subdivided into the cecum, and ascending, transverse, descending, and sigmoid colons, rectum, and anal canal. The small intestine is a tubular structure
Gastrointestinal_tract
Machine Learning framework written in the R language
binary addition. > # install the rnn package, including the dependency sigmoid > install.packages('rnn') > # load the rnn package > library(rnn) > # create
Rnn_(software)
Opening in the base of the skull allowing many structures to pass
pass, including the inferior petrosal sinus, three cranial nerves, the sigmoid sinus, and the posterior meningeal artery. The jugular foramen is formed
Jugular_foramen
Species of beetle
Cryptophagus varus, the sigmoid fungus beetle, is a species of silken fungus beetle in the family Cryptophagidae. It is found in North America. "Cryptophagus
Cryptophagus_varus
Physiological phenomenon involving the hardening and enlargement of the penis
more by relaxation of the retractor penis muscle and straightening of the sigmoid flexure. A male fossa's penis reaches to between his forelegs when erect
Erection
Human position used for rectal examination, treatments, and enemas
Sigmoidoscopy – Medical examination of the large intestine from the rectum to the sigmoid colon Pamela J. Carter; Susan Lewsen (2005). "11. Positioning, lifting
Sims'_position
Pouch in the large intestine
During a dissection, the colon could be traced from the rectum, to the sigmoid colon, through the descending, transverse, and ascending sections. The
Cecum
Visual tool used to understand how human blood carries and releases oxygen
lower oxygen partial pressures. The curve is usually best described by a sigmoid plot, using a formula of the kind: S ( t ) = 1 1 + e − t . {\displaystyle
Oxygen–hemoglobin dissociation curve
Oxygen–hemoglobin_dissociation_curve
Stomach aches
cancer, endometrial cancer Left lower quadrant Bowel: diverticulitis, sigmoid colon volvulus, bowel obstruction, gas accumulation, Toxic megacolon Right
Abdominal_pain
Organ in the gastrointestinal tract
and transverse colon will be formed and from colon 2 the descending and sigmoid colons and the rectum. Second stage of development of the intestinal canal
Small_intestine
supplied by the artery, viz., the left colic and sigmoid plexuses, which supply the descending and sigmoid parts of the colon; and the superior hemorrhoidal
Inferior_mesenteric_plexus
Mango variety produced in Mexico
generally weigh between 6 and 10 ounces (170 and 280 g), with a somewhat sigmoid shape ("S"-shaped) and a gold-yellow skin. The flesh is not fibrous, and
Ataulfo_(mango)
Time to make a decision as a result of the possible choices
shown that the relationship between predictability and reaction time is sigmoid, not linear associated with different modes of action. Hick's law is sometimes
Hick's_law
Asymmetric sigmoid function
for a time series, named after Benjamin Gompertz (1779–1865). It is a sigmoid function which describes growth as being slowest at the start and end of
Gompertz_function
Function in statistics
are the probit function and probit model. The logit and probit are both sigmoid functions with a domain between 0 and 1, which makes them both quantile
Logit
Digestive system structure
duodenum, all of the small intestine, caecum and appendix, transverse colon, sigmoid colon and rectum. In these sections of the gut there is clear boundary
Gastrointestinal_wall
Paradigm in machine learning that uses no classification labels
thresholded at 2/3. The inverse function = { 0 if x <= 2/3, 1 if x > 2/3 }. Sigmoid Belief Net Introduced by Radford Neal in 1992, this network applies ideas
Unsupervised_learning
Cognitive science approach
known as "hidden layers") alongside input and output units, and used a sigmoid activation function instead of the old "all-or-nothing" function. Their
Connectionism
Topics referred to by the same term
to elliptic functions Rado's sigma function, see busy beaver See also sigmoid function. This disambiguation page lists mathematics articles associated
Sigma_function
Part of the throat that is behind the mouth and nasal cavity
colon Hepatic flexure Transverse colon Splenic flexure Descending colon Sigmoid colon Continuous taenia coli haustra epiploic appendix Rectum Transverse
Pharynx
Tube running from the outer ear to the middle ear
millimetres (1 in) long and 7 millimetres (0.28 in) in diameter. It has a sigmoid form and runs from behind and above downward and forward. On the cross-section
Ear_canal
Process of constructing a curve that has the best fit to a series of data points
logistic sigmoid function (S-curve) is used to describe the relation between crop yield and growth factors. The blue figure was made by a sigmoid regression
Curve_fitting
S-curved form used in woodworking, moulding, textile weaving, and architecture
architecture and building trades—that has a serpentine or extended S shape (sigmoid). Ogees consist of a double curve, the combination of two curves that,
Ogee
Architectural motif in neural networks for aggregating information
element-wise matrix multiplication, and sigmoid ( ⋅ ) {\displaystyle {\text{sigmoid}}(\cdot )} is the sigmoid function. In other words, the nodes with
Pooling_layer
Hyperbolic analogues of trigonometric functions
functions List of integrals of hyperbolic functions Poinsot's spirals Sigmoid function Trigonometric functions Weisstein, Eric W. "Hyperbolic Functions"
Hyperbolic_functions
Topics referred to by the same term
compositional purposes S-curve (math), a characteristic S-shaped curve of a sigmoid function S-curve corset, an Edwardian corset style S-Curve Records, a record
S_Curve
Organs of the immune system
(a) small glands on the branches of the left colic and sigmoid arteries (b) a group in the sigmoid mesocolon, around the superior hemorrhoidal artery (c)
Inferior mesenteric lymph nodes
Inferior_mesenteric_lymph_nodes
Family of computer vision models designed for efficient inference on mobile devices
piecewise-linear approximations of swish and sigmoid activation functions (which they called "h-swish" and "h-sigmoid"), squeeze-and-excitation modules, and
MobileNet
Body cavity bounded by the pelvic bones
reproductive organs, urinary bladder, distal ureters, proximal urethra, terminal sigmoid colon, rectum, and anal canal. In females, the uterus, fallopian tubes
Pelvic_cavity
Branch of the abdominal aorta supplying part of the large intestine
anal canal. The regions supplied by the IMA are the descending colon, the sigmoid colon, and part of the rectum. The IMA arises from the anterior aspect
Inferior_mesenteric_artery
Name for several different families of probability distributions
left and right tails, one of the sigmoids in the pdf saturates to one, so that the tail is formed by the other sigmoid. For large negative x {\displaystyle
Generalized logistic distribution
Generalized_logistic_distribution
Air-filled cavities in the temporal bone
process to its tip, and be separated from the posterior cranial fossa and sigmoid sinus by a mere slip of bone or not at all. They may extend into the squamous
Mastoid_cells
Reflex of the gastrointestinal tract in humans and other mammals
gastrocolic reflex is unevenly distributed throughout the colon, with the sigmoid colon exhibiting a greater phasic response to propel food distally into
Gastrocolic_reflex
Anatomical subdivision scheme
posterior quadrant. Important organs here are: the descending colon and sigmoid colon the left ovary and fallopian tube the left ureter The left upper
Quadrants and regions of abdomen
Quadrants_and_regions_of_abdomen
Blood vessel
accommodated by the groove for marginal sinus. It usually drains into either the sigmoid sinus, or the jugular bulb. It communicates with the basilar venous plexus
Marginal_sinus
Medical condition
condition in which a herniation of peritoneum containing loops of redundant sigmoid colon descends (prolapses) into the rectouterine pouch (in females), between
Sigmoidocele
Body cavity in the abdominal area
portion of the colon to the abdominal wall, and the sigmoid mesocolon which enfolds the sigmoid colon. The omentum are specialized folds of peritoneum
Abdominal_cavity
Thin connective tissue layer of mucous membranes
colon Hepatic flexure Transverse colon Splenic flexure Descending colon Sigmoid colon Continuous taenia coli haustra epiploic appendix Rectum Transverse
Lamina_propria
Primary sexual organ of male animals
are curved in an S-shape when not erect. In bulls, rams and boars, the sigmoid flexure of the penis straightens out during erection. When mating, the
Penis
Technique in neural networks for learning joint representations of text and images
is a learned parameter. Other loss functions are possible. For example, Sigmoid CLIP (SigLIP) proposes the following loss function: L = 1 N ∑ i , j ∈ 1
Contrastive Language–Image Pre-training
Contrastive_Language–Image_Pre-training
Chemical reaction whose product is also its catalyst
{[A]_{0}}{[B]_{0}}}e^{-([A]_{0}+[B]_{0})kt}}}} . The graph for these equations is a sigmoid curve (specifically a logistic function), which is typical for autocatalytic
Autocatalysis
Top border of the hip
sinuously curved, being concave inward in front, concave outward behind. It is sigmoid in shape, such that viewed from above, the left iliac crest resembles an
Iliac_crest
Protective layer that lines the interior of hollow organs
colon Hepatic flexure Transverse colon Splenic flexure Descending colon Sigmoid colon Continuous taenia coli haustra epiploic appendix Rectum Transverse
Mucous_membrane
Protein-coding gene in the species Homo sapiens
gland pancreatic ductal cell right lobe of thyroid gland rectum mucosa of sigmoid colon right uterine tube olfactory zone of nasal mucosa trachea Top expressed
Trefoil_factor_3
Posterior part of the alimentary canal
of the transverse colon and the splenic flexure, the descending colon, sigmoid colon and up to the ano-rectal junction. In zoology, the term hindgut refers
Hindgut
Protein-coding gene in the species Homo sapiens
Mouse (ortholog) Top expressed in smooth muscle tissue muscle layer of sigmoid colon epithelium of colon right auricle of heart subcutaneous adipose tissue
Dermatopontin
Protein-coding gene in the species Homo sapiens
right lobe of liver rectum placenta mucosa of urinary bladder mucosa of sigmoid colon olfactory zone of nasal mucosa Top expressed in left lobe of liver
HSD17B2
Inability to fully empty the rectum during bowel movements
normal (unlike slow transit constipation), but delayed in the rectum and sigmoid colon. Constipation is usually divided into two groups: primary and secondary
Obstructed_defecation
Sigmoid shape special function
π {\displaystyle 2/{\sqrt {\pi }}} . This nonelementary integral is a sigmoid function that occurs often in probability, statistics, and partial differential
Error_function
Tube attached to the intestine
colon Hepatic flexure Transverse colon Splenic flexure Descending colon Sigmoid colon Continuous taenia coli haustra epiploic appendix Rectum Transverse
Appendix_(anatomy)
Protein-coding gene in humans
fiber pancreatic ductal cell parietal pleura germinal epithelium mucosa of sigmoid colon Top expressed in ascending aorta calvaria fossa aortic valve condyle
CKAP4
Position of the body used for sexual activities
the depth of penetration, but can pose the risk of pushing against the sigmoid colon. If the receiving partner is male, this increases the chances of
Sex_position
over the entire domain (i.e. including the tail-end). Using the logistic sigmoid function for the same data applied in the van Genuchten-Gupta model, the
Salt_tolerance_of_crops
SIGMOID
SIGMOID
SIGMOID
SIGMOID
Boy/Male
Belgium, Indian, Portuguese
Removes Darkness by Bringing Light; Turning Around
Girl/Female
American, British, Christian, English, French, Greek, Scottish, Spanish
Pretty; Good; Sweet; Strange; Foreign; Charming; Beautiful; Pleasant
Boy/Male
Indian, Punjabi, Sikh
God's Light
Girl/Female
Native American
Beautiful.
Boy/Male
Australian, Finnish, German, Greek
Men Warrior
Boy/Male
African, Arabic, Egyptian, Swahili
Victorious; Supporter
Girl/Female
Polish American Czechoslovakian Hawaiian
A flower name.
Boy/Male
Hindu, Indian
Shiva's Ansh; Part of Lord Shiva
Female
French
Possibly a contracted form of French Gwenaëlle, GAËLLE means "holy and generous."
Girl/Female
Tamil
Ankira | அநà¯à®•à¯€à®°à®¾
Loser, Follower
SIGMOID
SIGMOID
SIGMOID
SIGMOID
SIGMOID
adv.
In a sigmoidal manner.
a.
Alt. of Sigmoidal
a.
Curved in two directions, like the letter S, or the Greek /.